Cart stand

Abstract

To provide a cart stand.SOLUTION: The cart stand includes: a support column; a sliding member slidably provided with respect to the support column; an elastic member provided on the support column; a first connecting member; a first interlocking member, where a first end of the first connecting member is connected to the sliding member and a second end of the first connecting member is interlockingly connected to the first interlocking member; a second interlocking member interlockingly connected to the first interlocking member; and a second connecting member having a first end interlockingly connected to the second interlocking member and a second end connected to the elastic member. When the sliding member slides relative to the support column, the first interlocking member moves along a first predetermined trajectory, and the second interlocking member moves along a second predetermined trajectory. The movements of the first and second interlocking members deform the elastic member accordingly. The sliding member has a suspended support position, and the second interlocking member is configured to be movable along a predetermined direction relative to the first interlocking member. The technical aspect of the invention allows adaptation to loads of different weights.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] This application claims priority to a Chinese utility model having application number 202420739176.8, filed on April 10, 2024, and entitled "Cart Stand."

[0002] The present invention relates to the field of lifting devices, and more particularly to cart stands. [Background technology]

[0003] In the past, to accommodate a wider range of applications, cart stands generally adopted electric lifting or hand-operated lifting. The electric type is expensive, requires plugging into an outlet, is not very convenient for mobile cart stands, and has a slow lifting speed. The hand-operated type requires manually turning a handle to rotate the screw, which is time-consuming and inconvenient to use.

[0004] The inventor knows a lifting device that can achieve free suspension in the height direction, but this lifting device is only suitable for supporting objects of a fixed weight. Based on this, the inventor provides a cart stand that can be suitable for supporting objects of different weights while achieving free suspension in the height direction. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION The main object of the present invention is to provide a cart stand that can accommodate heavy objects of different weights and allows for free hanging. [Means for solving the problem]

[0006] In order to achieve the above object, according to one aspect of the present invention, there is provided a mechanism for moving a movable member along a first predetermined locus, the mechanism comprising: a support; a sliding member slidably provided on the support; an elastic member provided on the support; a first connecting member; a first interlocking member movably provided along a first predetermined locus, the first connecting member having a first end connected to the sliding member and a second end interlocked with the first interlocking member; a second interlocking member interlocked with the first interlocking member and movably provided along a second predetermined locus, the first end interlocked with the second interlocking member; and a second connecting member having a second end connected to the elastic member, wherein when the sliding member slides relative to the support, the first interlocking member moves along a first preset locus and the second interlocking member moves along a second preset locus, and the first and second connecting members move, carrying and deforming the elastic member, the sliding member has a hanging support position, and the second interlocking member is movable along a preset direction relative to the first interlocking member to accommodate supported objects of different gravity.

[0007] Furthermore, the cart stand further includes a pivot structure pivotally connected to the support pillar, wherein a first interlocking member and a second interlocking member are both provided on the pivot structure, the second interlocking member is located between a pivot point between the pivot structure and the support pillar and the first interlocking member, the pivot structure is provided to be swingable around the pivot point, and the second interlocking member slides into the pivot structure; alternatively, the first predetermined trajectory is arc-shaped, and the second predetermined trajectory is arc-shaped.

[0008] Furthermore, when the cart stand includes a pivoting structure, the second linking member, the first linking member and the pivot point form a triangular structure.

[0009] Furthermore, the cart stand further includes an adjustment structure for adjusting the position of the second interlocking member, the adjustment structure including a screw and an adjustment member connected to the screw, the screw is rotatably fixed to the rotating structure, the screw is inserted into the second interlocking member and threadedly attached to the second interlocking member, and by twisting the adjustment member, the second interlocking member is moved linearly along the axial direction of the screw, the rotating structure including a first rotating member and a second rotating member arranged opposite each other, the first rotating member having a rotating shaft, a second interlocking member and a fixed shaft arranged in that order, the screw is connected to the locking member after passing through the rotating shaft, the second interlocking member and the fixed shaft, and the second rotating member is fixedly connected to the first rotating member.

[0010] Furthermore, an operating hole corresponding to the adjustment member is provided on the side wall of the support, or a guide hole is provided in the first rotating member and / or the second rotating member, and a part of the structure of the second interlocking member is inserted into the guide hole, so that the second interlocking member can slide along the guide hole.

[0011] Furthermore, the first connecting member is a rope, and the cart stand further includes a first guide member connected to the support, one end of the rope is hung around a fixed pulley and then connected to the sliding member, and the other end of the rope is hung around the first guide member and then linked to the first interlocking member, the first guide member includes a first guide wheel and a second guide wheel arranged coaxially, the radius of the first guide wheel is larger than the radius of the second guide wheel, and the other end of the rope is hung around the first guide wheel and the second guide wheel sequentially and then linked to the first interlocking member.

[0012] Furthermore, a plurality of tooth grooves are provided at intervals on the outside of the axial end surface of the first guide member, and the cart stand further includes a rotation prevention device and a mounting seat, the mounting seat is fixedly connected to the support, the rotation prevention device is movably mounted relative to the mounting seat and has a first position in which it engages with the tooth groove and a second position in which it disengages from the tooth groove, and the cart stand further includes a knob threadedly attached to the mounting seat, the end of the knob that passes through the mounting seat is connected to the rotation prevention device and moves the knob along the axial direction.

[0013] Furthermore, the second connecting member is a chain, and the cart stand further includes a second guide member connected to the support, which is used to guide the chain and transmit the acting force to the elastic member, and the second guide member is a sprocket, and there are two sprockets, each located on both sides of the width direction of the chain.

[0014] Furthermore, the support pillar is provided with a first stopper and a second stopper, and the second stopper is located between the first stopper and the pivoting structure, the first stopper is used to determine the limit position for the sliding member to slide upward, and the second stopper is used to determine the limit position for the sliding member to slide downward.

[0015] Furthermore, both the first preset locus and the second preset locus are arc-shaped, and the radius of the second preset locus is equal to or less than the radius of the first preset locus; alternatively, a first pulley group including a plurality of first pulleys is provided on the side of the sliding member facing the support post, and a second pulley group including a plurality of second pulleys is provided on a side of the sliding member, and the plurality of second pulleys are provided on opposite side surfaces of the sliding member, respectively, and the plurality of second pulleys located on the same side of the sliding member are offset, and the sliding member is slidably fitted to the support post via the first pulley group and the second pulley group. [Effects of the Invention]

[0016] By applying the technical aspects of the present invention, the sliding member has a suspension support position due to the interlocking of the first interlocking member and the second interlocking member, making it possible to hang heavy objects at different heights. In addition, because the second interlocking member is provided to be movable along a predetermined direction, the point of application of the elastic member interlocked and connected to the second interlocking member can be changed, making it possible to adapt to heavy objects with different gravitational forces, such as display panels. [Brief explanation of the drawings]

[0017] The explanatory drawings which form a part of this invention are intended to provide a further understanding of the invention, and the schematic embodiments of the invention and the description thereof are intended to illustrate the invention and are not intended to unduly limit the invention.

[0018] [Figure 1] 1 shows a perspective view of a partial configuration of a cart stand according to an embodiment of the present invention. [Figure 2] 1 shows a schematic overall configuration diagram of a cart stand according to an embodiment of the present invention; [Figure 3] 1 shows a schematic exploded view of a cart stand according to an embodiment of the present invention; [Figure 4] 4 shows a schematic configuration diagram of the rotation structure, the adjustment structure, and the second connecting member of the cart stand of FIG. 3. [Figure 5] 5 shows a schematic exploded view of the configuration of FIG. [Figure 6] 4 shows a schematic exploded view of the first guide member, the first connecting member, and the like of the cart stand of FIG. 3. [Figure 7] 4 shows a schematic view of the cart stand of FIG. 3 with the slide member in a first position. [Figure 8] 4 shows a schematic view of the cart stand of FIG. 3 with the slide member in a second position. [Figure 9] 4 shows a schematic perspective view of the sliding member of the cart stand of FIG. 3. FIG. [Figure 10] 10 shows a top view of the sliding member of FIG. 9. [Figure 11] 10 shows a schematic exploded view of a cart stand according to another embodiment of the present invention. [Figure 12] 10 is a schematic exploded view of a cart stand according to another embodiment of the present invention, seen from another perspective; [Figure 13] 10 is a schematic exploded view of a first connecting member and a fitting structure of a cart stand according to another embodiment of the present invention; FIG. [Figure 14] FIG. 10 shows a schematic perspective view of an adjustment assembly according to another embodiment of the present invention after removing the spring. DETAILED DESCRIPTION OF THE INVENTION

[0019] It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other as long as they do not conflict with each other. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments with reference to the drawings.

[0020] 1 to 10, the present invention provides a cart stand. The cart stand of this embodiment includes a support 10, a sliding member 20 slidably mounted on the support 10, an elastic member 30 mounted on the support 10, a first connecting member 40, a first interlocking member A movable along a first predetermined locus, the first connecting member 40 having a first end connected to the sliding member 20 and a second end interlocked with the first interlocking member A, a second interlocking member B interlocked with the first interlocking member A and movable along a second predetermined locus, the first end of the first interlocking member A being interlocked with the second interlocking member B, and the second interlocking member B being interlocked with the first interlocking member A. and a second connecting member 50 having a first end connected to the first interlocking member A and a second end connected to the elastic member 30. When the sliding member 20 slides relative to the support 10, the first interlocking member A moves along a first predetermined locus, and the second interlocking member B moves along a second predetermined locus, and the first connecting member 40 and the second connecting member 50 move, thereby carrying and deforming the elastic member 30. The sliding member 20 has a hanging support position, and the second interlocking member B is movable along a predetermined direction relative to the first interlocking member A so as to adapt to supported objects with different gravitational forces.

[0021] By configuring the cart stand as described above, the sliding member has a hanging support position through the interlocking of the first interlocking member A and the second interlocking member B, allowing for the hanging of heavy objects at different heights. Furthermore, because the second interlocking member B is movable in a predetermined direction, the point of application of the elastic member interlocked with the second interlocking member B can be changed, allowing for adaptation to heavy objects with different gravitational forces, such as display panels.

[0022] The first interlocking member A and / or the second interlocking member B are pin shafts. Of course, they may also be rolling wheels or rotating wheels. In the present invention and the embodiments thereof, the second interlocking member B is a pin shaft and the first interlocking member A is a pulley. Interlocking connection means that the interlocking members (including the first interlocking member A and the second interlocking member B) can interlock the connected structures and play the role of transmitting motion. The predetermined direction of the second interlocking member B means the axial direction of the screw, i.e., the lengthwise extension direction of the guide hole.

[0023] As shown in FIG. 3, the cart stand further includes a pole cover plate 90 connected to the pole 10 .

[0024] 9 and 10, in one embodiment of the present invention, a first pulley group including a plurality of first pulleys 21 is provided on the side of the sliding member 20 facing the support post 10. A second pulley group including a plurality of second pulleys 22 is provided on the side of the sliding member 20, and the plurality of second pulleys 22 are provided on both opposing side surfaces of the sliding member 20, respectively, and the plurality of second pulleys 22 located on the same side surface are provided offset, and the sliding member 20 is slidably fitted to the support post 10 via the first pulley group and the second pulley group.

[0025] Specifically, the number of the multiple first pulleys 21 is four, and the four first pulleys 21 are provided at four corner positions on the back surface of the sliding member 20, and the four first pulleys 21 abut against the left and right side surfaces of the support 10, respectively, to achieve left and right positioning. In addition, four second pulleys 22 are provided on the left and right side surfaces of the sliding member 20, and the second pulleys 22 abut against the rails of the support 10 to achieve front and rear positioning. This allows the sliding member 20 to slide freely on the support 10, and prevents shaking.

[0026] 1, in one embodiment of the present invention, the cart stand further includes a crossbar 23 and a hanging arm 24 connected to the crossbar 23, the crossbar 23 is connected to the sliding member 20, and the hanging arm 24 is used to connect a supported object such as a display panel. Preferably, a base 15 is provided at the bottom of the support 10, and rollers are provided on the base 15 to facilitate movement of the entire cart stand.

[0027] In one embodiment of the present invention, the cart stand further includes a pivot structure 60 pivotally connected to the support 10, wherein a first interlocking member A and a second interlocking member B are both provided on the pivot structure 60, the second interlocking member B is located between the pivot point between the pivot structure 60 and the support 10 and the first interlocking member A, the pivot structure 60 is arranged to be swingable around the pivot point, and the second interlocking member B is slidably fitted into the pivot structure 60.

[0028] In the above installation, the pivoting structure 60 can be used to achieve free pivoting on the support 10 .

[0029] In one embodiment, the second linking member B, the first linking member A and the pivot point form a triangular structure.

[0030] By arranging them in this manner, there is no interference between the movement processes of the first interlocking member A and the second interlocking member B, the longitudinal dimension of the pivoting structure 60 is minimized, and the overall structure of the pivoting structure 60 equipped with the first interlocking member A and the second interlocking member B can be ensured to be compact.

[0031] In one embodiment of the present invention, the first preset trajectory and the second preset trajectory are both arc-shaped, and the radius of the second preset trajectory is less than or equal to the radius of the first preset trajectory.

[0032] When the first interlocking member A and the second interlocking member B have different movement trajectories, for example, when the radius of the trajectory of the first interlocking member A is fixed and the radius of the trajectory of the second interlocking member B is adjustable, gravity acts on the first interlocking member A and the elastic force of the elastic member 30 acts on the second interlocking member B, so that the movement trajectory of the second interlocking member B can be adjusted according to the weight of the supported object, such as a display panel. The above adjustment process is convenient and easy to operate.

[0033] Note that the radius of the second preset trajectory is equal to the radius of the first preset trajectory means that the two trajectories overlap into one trajectory.

[0034] As shown in FIG. 5 , in one embodiment of the present invention, the cart stand further includes an adjustment structure 80 for adjusting the position of the second interlocking member B. The adjustment structure 80 includes a screw 82 and an adjustment member 81 connected to the screw 82. The screw 82 is rotatably fixed to the pivoting structure 60. The screw 82 is inserted into the second interlocking member B and threadedly engaged with the second interlocking member B. Twisting the adjustment member 81 causes the second interlocking member B to move linearly along the axial direction of the screw 82. The pivoting structure includes a first pivoting member 61 and a second pivoting member 62 arranged opposite each other. The first pivoting member 61 is provided with a pivot shaft 63, a second interlocking member B, and a fixed shaft 64, in that order. The screw 82 passes through the pivot shaft 63, the second interlocking member, and the fixed shaft 64 before connecting to the locking member 83. The second pivoting member 62 is fixedly connected to the first pivoting member 61.

[0035] The first interlocking member A is pivotally connected between the first rotating member 61 and the second rotating member 62. The adjustment structure 80 adjusts the second interlocking member B so that it is movable along the axial direction of the screw 82. At the same time, one end of the elastic member 30 is connected to the second interlocking member B, so that the point of application of the elastic member 30 on the first rotating member 61 can be changed as the second interlocking member B moves, making it possible to adapt to display panels with different gravitational forces. In addition, by utilizing the form in which the screw 82 and the second interlocking member B are threadedly connected, the rotational movement of the screw 82 can be converted into linear movement of the second interlocking member B, and this adjustment method is simple and easy to operate.

[0036] 4, in order to guide the movement direction of the second interlocking member B, two guide holes are preferably provided in each of the first rotating member 61 and the second rotating member 62, and two corresponding guide holes are provided, and a part of the structure of the second interlocking member B is inserted into the two guide holes, so that the second interlocking member B can slide along the guide holes. Preferably, the length extension direction of the two guide holes is parallel to the axial direction of the screw 82.

[0037] 2, in one embodiment of the present invention, an operating hole 11 corresponding to the adjustment member 81 is provided on the side wall of the support 10 to facilitate operation of the adjustment member 81. In this way, a tool such as a wrench 14 can be passed through the support 10 to directly twist the screw 82, adjusting the point of application of the elastic member 30 to the pivot structure 60 and changing the moment of the elastic force on the pivot structure 60, thereby making it possible to accommodate display panels of different weights.

[0038] In one embodiment of the present invention, the first connecting member 40 is a rope, and the cart stand further includes a first guide member 71 connected to the support 10. One end of the rope is looped around the fixed pulley 16 and then connected to the sliding member 20, and the other end of the rope is looped around the first guide member 71 and then interlocked with the first interlocking member A. The first guide member 71 includes a first guide wheel 711 and a second guide wheel 712 arranged coaxially, the radius of the first guide wheel 711 being larger than the radius of the second guide wheel 712, and the other end of the rope is looped around the first guide wheel 711 and the second guide wheel 712 in sequence and then interlocked with the first interlocking member A.

[0039] When relative movement occurs between the sliding member 20 and the support 10, the rope moves, transmitting power to the second connecting member 50 and deforming the elastic member 30. The first guide member 71 changes the stroke of the sliding member 20. Because the rotation angle of the pivoting structure 60 is limited, the first guide member 71 does not have a second guide wheel 712. If the force acts directly on the pivoting structure 60 via the first guide wheel 711, the number of rotations of the first guide wheel 711 will be reduced, affecting the stroke of the sliding member 20. In this embodiment, the first guide member 71 includes two guide wheels with different radii. This keeps the rope at one end of the elastic member 30 taut, ensuring smooth power transmission to the pivoting structure 60. The proportion of variable-diameter wheels also reduces the strain on the elastic member while increasing the stroke of the sliding member 20.

[0040] Of course, in optional embodiments, the first guide member 71 may not be provided, or the first guide member 71 may include two pulleys.

[0041] In an optional embodiment, the elastic member 30 is a spring. The number of springs may be one or multiple springs arranged in parallel. One end of the spring is connected to the support 10, and the other end of the spring is connected to the second connecting member 50. The initial tension of the spring is preset and does not need to be adjusted. In this embodiment, one end of the spring is tensioned and attached to the support 10 by a screw, which makes installation easy. Of course, one end of the spring can also be used as a hook to directly hang on the support 10, but in that case, a tool must be used to unfold the spring and hang it on the support 10.

[0042] 6, in one embodiment of the present invention, the first guide member 71 has a plurality of spaced apart tooth grooves on the outer side of its axial end surface, and the cart stand further includes a rotation stopper 74 and a mounting seat 73. The mounting seat 73 is fixedly connected to the support 10, and the rotation stopper 74 is movably mounted relative to the mounting seat 73, having a first position where it engages with the tooth grooves and a second position where it disengages from the tooth grooves. The cart stand further includes a knob 75 threadedly attached to the mounting seat 73, and the end of the knob 75 that passes through the mounting seat 73 is connected to the rotation stopper 74, allowing the rotation stopper 74 to move axially along the knob 75.

[0043] In this way, by twisting the knob 75, the anti-rotation device 74 can be moved along with it, allowing the anti-rotation device 74 to be engaged and disengaged with the tooth groove, making the above operation easy. Furthermore, when the anti-rotation device 74 engages with the tooth groove, the first guide member 71 cannot rotate, thereby fixing the sliding member 20 in a certain position. As shown in FIG. 5 , in one embodiment of the present invention, the second connecting member 50 is a chain, and the cart stand further includes a second guide member 72 connected to the support 10. The second guide member 72 is used to guide the chain and transmit the acting force to the elastic member 30. The second guide member 72 is a sprocket, and there are two sprockets, each located on either side of the chain in the width direction.

[0044] Preferably, anti-rotation device 74 is provided with at least one mounting through-hole, and mounting seat 73 is provided with a pin shaft that fits into the mounting through-hole. This allows anti-rotation device 74 to be assembled to mounting seat 73. With this installation, after knob 75 is twisted, anti-rotation device 74 can move along the axial direction of the pin shaft.

[0045] By using a chain as the second connecting member 50, the chain has a certain rigidity relative to the rope, ensuring stable transmission of the acting force and ensuring smooth movement. The second guide member 72 not only serves to guide the chain, but also transmits the acting force to the elastic member 30 via the chain while the chain is moving.

[0046] In another optional embodiment, the second connecting member 50 may be a connecting rope and the second guiding member 72 may be a guiding pulley accordingly.

[0047] In this embodiment of the present invention, the rope serving as the first connecting member 40 has a stopper block attached to the first guide member 71, which has a corresponding groove. In this way, a pulling force applied to one end of the rope does not affect the other end, and one rope corresponds to two ropes. When one end of the rope located on the first guide wheel 711 is pulled, the rope is wound around the first guide wheel 711 several times, causing the first guide wheel 711 to rotate. As a result, the rope pulling one end of the second guide wheel 712 begins to be wound around the second guide wheel 712, pulling the rotating plate.

[0048] To prevent the stopper block from falling out of the groove, a cover plate is attached to the first guide member 71. Each of the first guide wheels 711 is provided with a threaded rib, which allows the ropes to be separated so that they do not come into contact with each other, preventing the ropes from coming into contact and wearing out and breaking during reeling, and also preventing the ropes from coming into contact and generating abnormal noise during reeling.

[0049] 7 and 8, in one embodiment of the present invention, a first stopper and a second stopper are provided on the support 10 to define the limit positions to which the sliding member 20 can move relative to the support 10, i.e., to restrict the sliding range of the sliding member 20. The second stopper is located between the first stopper and the pivot structure 60, and the first stopper is used to define the limit position to which the sliding member can slide upward, while the second stopper is used to define the limit position to which the sliding member 20 can slide downward. In FIG. 7, the sliding member 20 is in a first position, and in FIG. 8, the sliding member 20 is in a second position, and the first position is higher than the second position.

[0050] Preferably, the sliding member 20 is a sliding panel.

[0051] The exercise process will be described below with reference to FIGS.

[0052] When a heavy load is attached to the sliding panel and the sliding panel is pulled downward to pull the rope, the rope is first wound around the first guide wheel 711 of the first guide member 71 several times, causing the first guide member 71 to rotate clockwise, and at this time the second guide wheel 712 of the first guide member 71 also pulls the rope in synchronization, pulling the rotating structure 60 and rotating it counterclockwise.

[0053] On the other hand, since the spring is attached to the sprocket via a chain and acts on the sliding axis of the rotating structure 60, a clockwise moment is generated on the rotating structure 60, which offsets the moment of gravity on the rotating structure 60 and allows the heavy object to be stopped freely at a certain position.

[0054] If the sliding panel is continued to be pulled downward, the angle of the spring force acting on the pivoting structure 60 will constantly change as the pivoting structure 60 continues to rotate, the spring will also constantly be pulled, the value of the spring force will constantly change, and while gravity will not change, the angle at which the component force generated by gravity acts on the pivoting structure 60 will also constantly change. Based on these known conditions, computer motion simulation can be used to make the gravity torque and the spring torque equal at any angle of the pivoting structure 60, and the specific parameters and position of the spring's point of application can be obtained. This allows the sliding panel to be freely stopped at any position.

[0055] 11 to 14, in one embodiment of the present invention, the first connecting member 40 is a rope, and the cart stand further includes a mounting seat 9 connected to the support 10 and a third connecting member 12 fixedly installed relative to the mounting seat 9, with a fixed pulley 16 provided on the mounting seat 9. One end of the first connecting member 40 is hung around the fixed pulley 16 and then connected to the sliding member 20, and the other end of the first connecting member 40 is hung around the first interlocking member A and then connected to the third connecting member 12. A locking device is provided on the mounting seat 9, and the locking device is provided corresponding to the fixed pulley 16 and has a locked state and an unlocked state. When the locking device is in the locked state, it locks the rope to the fixed pulley 16, and when the locking device is in the unlocked state, it unlocks the rope.

[0056] The third connecting member 12 is fixedly installed relative to the mounting seat 9. It may be directly attached and fixed to the mounting seat 9, or directly fixedly connected to the support column 10, thereby providing a fixed connection end for the first connecting member 40 and allowing the other end of the first connecting member 40 to be fixed to the mounting seat 9. A fixed pulley 16 is provided on the mounting seat 9, one end of the first connecting member 40 is hung on the fixed pulley 16 and then connected to the sliding member 20, and the other end of the first connecting member 40 is hung on the first interlocking member A and then connected to the third connecting member 12. During the up and down movement of the sliding member 20, one end of the first connecting member 40 moves up and down together with the sliding member 20 to adjust the length of the first connecting member 40 located between the mounting seat 9 and the pivoting structure 60, and further adjust the swing position of the pivoting structure 60, thereby deforming the elastic member 30. At the same time, by adjusting the position of the second interlocking member B, the point of action of the elastic member 30 on the first rotating member 61 can be changed, so as to adapt to display panels of different gravity so that the sliding member 20 is in the hanging position.

[0057] When the sliding member 20 is in the hanging position, the locking device on the mounting base 9 can be operated to lock the rope to the fixed pulley 16, thus locking the display in its current position and preventing it from moving up or down. Even if the rope breaks, the rope connected to the sliding member 20 can still be locked by the locking device on the fixed pulley 16, preventing the display from falling directly, further protecting the display and preventing damage to the display due to rope breakage, thereby improving the safety and reliability of the cart stand. After the locking device is released, the display can still be freely adjusted in height by the sliding member 20 without affecting the adjustment of the hanging position of the sliding member 20.

[0058] In one embodiment, the mounting seat 9 includes two opposing upright plates 91 and a connecting plate 92 connected between the two opposing upright plates 91, the fixed pulley 16 is attached between the two upright plates 91, and both ends of the third connecting member 12 are attached to the two opposing upright plates 91, respectively. A loop 41 is provided at the second end of the rope, and the loop 41 is hooked on the third connecting member 12. The locking device includes a presser block 93 and an adjustment assembly connected to the presser block 93, and the adjustment assembly can adjust the distance between the presser block 93 and the fixed pulley 16, thereby allowing the presser block 93 to lock the rope to the fixed pulley 16 or release the lock of the rope by the presser block 93.

[0059] The mounting base 9 has a U-shaped structure, and two opposing upright plates 91 can be used to attach and support the third connecting member 12. A loop 41 is provided at the second end of the rope, facilitating the connection and fixation of the rope to the third connecting member 12. The pressure block 93 is located between the connecting plate 92 and the fixed pulley 16. By narrowing the gap between the pressure block 93 and the fixed pulley 16 using the adjustment assembly, the rope can be pressed against the fixed pulley 16, locking the pressure block 93 and the fixed pulley 16. As a result, the rope is clamped between the pressure block 93 and the fixed pulley 16 and cannot move, thereby locking the rope by the pressure block 93. When unlocking is required, the gap between the pressure block 93 and the fixed pulley 16 can be widened using the adjustment assembly to release the contact between the pressure block 93 and the rope and the fixed pulley 16. At this time, the rope can move around the fixed pulley 16, thereby unlocking the rope.

[0060] In one embodiment, the device includes a torsion member 94 and a threaded member 95, and the threaded member 95 includes a threaded portion 951 and a shank portion 952. The torsion member 94 is provided on a side of the connecting plate 92 away from the fixed pulley 16, the threaded portion 951 is fixedly connected to the torsion member 94, and the shank portion 952 is provided at an end of the threaded portion 951 away from the torsion member 94. The retaining block 93 is provided on a side of the connecting plate 92 away from the torsion member 94 and is positioned between the connecting plate 92 and the fixed pulley 16. A threaded hole 921 is provided in the connecting plate 92, and the threaded portion 951 is threadably engageable with the threaded hole 921. The retaining block 93 is rotatably connected to the shank portion 952 and forms an axial position restriction between the retaining block 93 and the shank portion 952.

[0061] A handle is provided on the top of the twisting member 94 to facilitate twisting of the twisting member 94. The threaded portion 951 is fixedly connected to the twisting member 94, and twisting the twisting member 94 rotates the threaded member 95 along with it, thereby enabling the threaded member 95 to be threaded forward and backward. The twisting member 94 may be formed separately from the threaded member 95 and then fixedly connected thereto by interference fit or welding, or may be formed integrally with the threaded member 95. Axial positioning is restricted between the holding block 93 and the shank portion 952, allowing the two to rotate relative to each other in the circumferential direction. As the twisting member 94 rotates the threaded member 95, the threaded portion 951 of the threaded member 95 is threaded into the threaded hole 921 of the connecting plate 92, forming a threaded engagement. Through the screwing action, the threaded member 95 moves the pressure block 93 toward the fixed pulley 16, and in the process, the width of the pressure block 93 fits the width between the two upright plates 91, and the position restricting action of the upright plates 91 on both sides prevents the pressure block 93 from rotating together with the threaded member 95, ensuring the precision of the fitting position between the pressure block 93 and the fixed pulley 16. Furthermore, because axial position restriction is formed between the pressure block 93 and the shank portion 952, the pressure block 93 can move toward the fixed pulley 16 together with the threaded member 95, and the axial movement of the threaded member 95 can be used to easily move the pressure block 93 in the axial direction, thereby realizing the rope locking and unlocking operations.

[0062] In one embodiment, the pressure block 93 includes a pressure projection 931 that protrudes toward the chute of the fixed pulley 16, and the pressure projection 931 has a concave surface that fits the rope. The pressure block 93 has a stepped hole 932 that extends therethrough, and the stepped hole 932 has a small hole portion and a large hole portion. A connection hole 953 is formed at the end of the shank portion 952, and a screw 101 is provided in the pressure block 93. The screw 101 passes through the small hole portion of the stepped hole 932 and connects to the connection hole 953, and the head of the screw 101 rests on the stepped surface of the stepped hole 932. The shank portion 952 has a stop step 954, and the pressure block 93 rests on the stop step 954.

[0063] The pressing protrusion 931 protrudes toward the chute and its shape matches the chute, ensuring a matching relationship between the pressing protrusion 931 and the chute. This allows the pressing protrusion 931 to be smoothly inserted into the chute without being obstructed by the wheel edges on both sides of the chute. The pressing surface of the pressing protrusion 931 is concave to match the shape of the rope. This allows the pressing protrusion 931 to conform to the surface of the rope when pressing the rope, creating a large contact area with the rope and ensuring the effectiveness of the pressure block 93 in pressing the rope. A stepped hole can be formed in the pressure block 93, allowing the screw 101 to be positioned within the countersunk hole after connecting the pressure block 93 and the shank 952 within the stepped hole 932. This allows the screw 101 to be positioned inside the concave surface of the pressing protrusion 931, preventing interference with the pressure fit between the pressing protrusion 931 and the rope. After the screw 101 is fixedly connected to the shank portion 952, it cooperates with the stop step 954 to form an axial position restriction for the holding block 93, and since the holding block 93 is sleeved on the outside of the shank portion 952, free rotation of the holding block 93 relative to the screw-attaching member 95 can be ensured.

[0064] In one embodiment, a spring 96 is provided between the torsion member 94 and the connecting plate 92, the spring 96 being sleeved onto the outside of the threaded member 95, with one end of the spring 96 abutting the torsion member 94 and the other end of the spring 96 abutting the connecting plate 92.

[0065] A spring 96 is provided between the torsion member 94 and the connecting plate 92. After the torsion member 94 carries the screw member 95 and screws it out of the connecting plate 92, the elastic force of the spring 96 presses the retaining block 93 against the inner surface of the connecting plate 92, thereby securing the locking device to the mounting seat 9. This avoids the problem of noise being generated when the locking device is free to move relative to the mounting seat 9 after the screw member 95 is screwed out of the connecting plate 92 during use.

[0066] In one embodiment, the second connecting member 50 is a chain, and the cart stand further includes a second guide member 72 connected to the support pole 10. The second guide member 72 is used to guide the chain and transmit the force to the elastic member 30. The second guide member 72 is a sprocket, and there is one sprocket. In this embodiment, the elastic member 30 is a spring, and this spring is provided on one side of the support pole 10. Therefore, when installing the spring, simply providing the second guide member 72 at the spring's mounting position allows the chain to be guided by the sprocket. After being guided by the sprocket, the extension direction of the chain is aligned with the axial direction of the spring in its natural state, preventing the spring from separating during operation and improving the operating efficiency of the spring.

[0067] From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects. The cart stand of the present application allows the sliding member to have a suspension support position through the interlocking of the first interlocking member A and the second interlocking member B, thereby enabling the suspension of heavy objects at different heights. Furthermore, because the second interlocking member B is movable along a predetermined direction, the point of application of the elastic member interlocked with the second interlocking member B can be changed, allowing the cart stand to accommodate heavy objects with different gravitational forces, such as display panels.

[0068] It is clear that the above-mentioned embodiments are only a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without paying creative labor should fall within the scope of protection of the present invention.

[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present application. As used herein, the use of the singular includes the plural unless the context clearly dictates otherwise. Also, when the terms "comprise" and / or "have" are used herein, it should be understood that they refer to the presence of features, steps, operations, devices, assemblies, and / or combinations thereof.

[0070] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications and variations to the present invention. Any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention shall be included within the protection scope of the present invention. [Explanation of symbols]

[0071] 10...Support, 11...Operation hole, 12...Third connecting member, 14...Wrench, 15...Base, 16...Fixed pulley, 20...Sliding member, 21...First pulley, 22...Second pulley, 23...Crossbar, 24...Suspension arm, 30...Elastic member, 40...First connecting member, 41...Loop, 50...Second connecting member, 60...Pivoting structure, 61...First pivoting member, 62...Second pivoting member, 63...Pivoting shaft, 64...Fixed shaft, 71...First guide member, 711...First guide wheel, 7 12...second guide wheel, 72...second guide member, 73...mounting seat, 74...rotation stopper, 75...knob, 80...adjustment structure, 81...adjustment member, 82...screw, 83...locking member, 9...mounting seat, 91...standing plate, 92...connecting plate, 93...holding block, 931...pressure protrusion, 932...step hole, 94...torsion member, 95...screw member, 951...thread portion, 952...shank portion, 953...connecting hole, 954...stop step, 96...spring, 101...screw.

Claims

1. A cart stand, A support (10); a sliding member (20) provided slidably relative to the support (10); an elastic member (30) provided on the support (10); A first connecting member (40); a first interlocking member A provided to be movable along a first preset trajectory, wherein a first end of the first connecting member (40) is connected to the sliding member (20) and a second end of the first connecting member (40) is interlocked with the first interlocking member A; a second interlocking member B interlocked with the first interlocking member A and movable along a second preset trajectory; a second connecting member (50) having a first end interlockingly connected to the second interlocking member B and a second end connected to the elastic member (30); When the sliding member (20) slides relative to the support (10), the first interlocking member (A) moves along the first preset locus, the second interlocking member (B) moves along the second preset locus, the first connecting member (40) and the second connecting member (50) move, and cause the elastic member (30) to deform, the sliding member (20) has a hanging support position, and the second interlocking member (B) is movable along a preset direction relative to the first interlocking member (A) to adapt to supported objects with different gravitational forces.

2. The vehicle further includes a rotating structure (60) that is rotatably connected to the support (10), wherein the first interlocking member A and the second interlocking member B are both provided on the rotating structure (60), the second interlocking member B is located between a pivot point between the rotating structure (60) and the support (10) and the first interlocking member A, the rotating structure (60) is provided so as to be swingable around the pivot point, and the second interlocking member B is slidably fitted into the rotating structure (60), Alternatively, the first predetermined trajectory is an arc, and the second predetermined trajectory is an arc.

2. The cart stand according to claim 1.

3. When the cart stand includes the pivot structure (60), the second linking member B, the first linking member A and the pivot point form a triangular structure.

3. The cart stand according to claim 2.

4. The present invention further includes an adjustment structure (80) for adjusting the position of the second interlocking member B, the adjustment structure (80) including a screw (82) and an adjustment member (81) connected to the screw (82), the screw (82) being rotatably fixed to the rotating structure (60), the screw (82) being inserted into the second interlocking member B and threadedly engaged with the second interlocking member B, and twisting the adjustment member (81) causes the second interlocking member B to move linearly along the axial direction of the screw (82), The rotation structure includes a first rotation member (61) and a second rotation member (62) provided opposite to each other, the first rotation member (61) is provided with a rotation shaft (63), the second interlocking member B, and a fixed shaft (64) in this order, the screw (82) is connected to a lock member (83) after passing through the rotation shaft (63), the second interlocking member, and the fixed shaft (64), and the second rotation member (62) is fixedly connected to the first rotation member (61).

3. The cart stand according to claim 2.

5. An operation hole (11) corresponding to the adjustment member (81) is provided on the side wall of the support (10), or A guide hole is provided in the first rotating member (61) and / or the second rotating member (62), a part of the structure of the second interlocking member B is inserted into the guide hole, and the second interlocking member B is slidable along the guide hole.

5. The cart stand according to claim 4.

6. The first connecting member (40) is a rope, The cart stand further includes a first guide member (71) connected to the support (10), one end of the rope is wound around a fixed pulley and then connected to the sliding member (20), and the other end of the rope is wound around the first guide member (71) and then interlocked with the first interlocking member A; The first guide member (71) includes a first guide wheel (711) and a second guide wheel (712) that are coaxially arranged, the radius of the first guide wheel (711) is larger than the radius of the second guide wheel (712), and the other end of the rope is sequentially wound around the first guide wheel (711) and the second guide wheel (712) and then interlocked with the first interlocking member A.

6. The cart stand according to claim 1, wherein the cart stand is a stand for supporting a vehicle.

7. A plurality of tooth grooves are provided at intervals on the outer side of the axial end surface of the first guide member (71), The cart stand further includes a rotation stopper (74) and a mounting seat (73), the mounting seat (73) is fixedly connected to the support (10), and the rotation stopper (74) is movably provided relative to the mounting seat (73) and has a first position where it engages with the tooth groove and a second position where it disengages from the tooth groove; The cart stand further includes a knob (75) screwed into the mounting seat (73), and an end of the knob (75) passing through the mounting seat (73) is connected to the anti-rotation device (74) to move the anti-rotation device (74) along the axial direction of the knob (75).

7. The cart stand according to claim 6.

8. The second connecting member (50) is a chain, The cart stand further includes a second guide member (72) connected to the support (10), the second guide member (72) being used to guide the chain and transmit the acting force to the elastic member (30); The second guide member (72) is a sprocket, and there are two sprockets, and the two sprockets are located on both sides in the width direction of the chain, respectively.

6. The cart stand according to claim 1, wherein the cart stand is a stand for supporting a vehicle.

9. The support (10) is provided with a first stopper and a second stopper, and the second stopper is located between the first stopper and the rotating structure (60), the first stopper is used to define a limit position for the sliding member to slide upward, and the second stopper is used to define a limit position for the sliding member (20) to slide downward.

6. The cart stand according to claim 2, wherein the cart stand is a stand for supporting a vehicle.

10. The first preset trajectory and the second preset trajectory are both arc-shaped, and the radius of the second preset trajectory is equal to or less than the radius of the first preset trajectory; or A first pulley group including a plurality of first pulleys is provided on the side of the sliding member (20) facing the support (10), and a second pulley group including a plurality of second pulleys is provided on the side of the sliding member (20), and the plurality of second pulleys are provided on opposite side surfaces of the sliding member (20), respectively, and the plurality of second pulleys located on the same side of the sliding member (20) are provided offset, and the sliding member (20) is slidably fitted onto the support (10) via the first pulley group and the second pulley group.

6. The cart stand according to claim 2, wherein the cart stand is a stand for supporting a vehicle.

11. The first connecting member (40) is a rope, The cart stand further includes a mounting seat (9) connected to the support (10), and a third connecting member (12) fixedly installed to the mounting seat (9), A fixed pulley (16) is provided on the mounting seat (9), one end of the first connecting member (40) is hung on the fixed pulley (16) and then connected to the sliding member (20), and the other end of the first connecting member (40) is hung on the first interlocking member A and then connected to the third connecting member (12), A locking device is provided on the mounting seat (9), and the locking device is provided corresponding to the fixed pulley (16), and has a locked state and an unlocked state, and when the locking device is in the locked state, the rope is locked to the fixed pulley (16), and when the locking device is in the unlocked state, the rope is unlocked.

6. The cart stand according to claim 1, wherein the cart stand is a stand for supporting a vehicle.

12. The mounting seat (9) includes two opposing upright plates (91) and a connecting plate (92) connected between the two opposing upright plates (91), the fixed pulley (16) is attached between the two upright plates (91), and both ends of the third connecting member (12) are attached to the two opposing upright plates (91), respectively. A loop (41) is provided at the second end of the rope, and the loop (41) is hooked onto the third connecting member (12); The locking device includes a pressure block (93) and an adjustment assembly connected to the pressure block (93), and the adjustment assembly can adjust the distance between the pressure block (93) and the fixed pulley (16), thereby allowing the pressure block (93) to lock the rope to the fixed pulley (16) or unlock the rope from the pressure block (93).

12. The cart stand of claim 11.

13. the adjustment assembly includes a torsion member (94) and a threaded member (95), the threaded member (95) including a threaded portion (951) and a shank portion (952), the torsion member (94) being provided on a side of the connecting plate (92) remote from the fixed pulley (16), the threaded portion (951) being fixedly connected to the torsion member (94), and the shank portion (952) being provided on an end of the threaded portion (951) remote from the torsion member (94); The pressing block (93) is provided on the side of the connecting plate (92) away from the torsion member (94) and is located between the connecting plate (92) and the fixed pulley (16); A screw hole (921) is provided in the connecting plate (92), the screw portion (951) can be screwed into the screw hole (921), and the pressing block (93) is rotatably connected to the shank portion (952) and forms an axial position restriction between the pressing block (93) and the shank portion (952).

13. The cart stand of claim 12.

14. The pressing block (93) includes a pressing protrusion (931) that protrudes toward the chute of the fixed pulley (16), and the pressing protrusion (931) has a concave surface that fits the rope; The pressing block (93) has a stepped hole (932) formed therethrough, the stepped hole (932) including a small hole portion and a large hole portion, A connecting hole (953) is opened at the end of the shank portion (952), a screw (101) is provided in the holding block (93), the screw (101) passes through the small hole portion of the stepped hole (932) and is connected to the connecting hole (953), and the head of the screw (101) stops on the stepped surface of the stepped hole (932), The shank portion (952) is provided with a stop step (954), and the pressing block (93) stops at the stop step (954), and / or A spring (96) is provided between the torsion member (94) and the connecting plate (92), the spring (96) is sleeved on the outside of the screw member (95), one end of the spring (96) abuts against the torsion member (94), and the other end of the spring (96) abuts against the connecting plate (92).

14. The cart stand of claim 13.

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