Portable electronic organ rack

Abstract

The invention provides a portable electronic organ rack. The portable electronic organ rack comprises a base, two transverse supporting legs, two vertical supporting legs and two supporting pieces. One ends of the two transverse supporting legs are rotationally connected with the base in the horizontal direction, and the two transverse supporting legs can be horizontally and outwards unfolded to the angle of a working state or inwards folded to a storage state; the lower ends of the two vertical supporting legs are rotationally connected with the base correspondingly, and the two vertical supporting legs can rotate upwards in the vertical direction to be unfolded to be in a working state and rotate downwards to be in a storage state. One ends of the two supporting pieces are rotationally connected to the upper ends of the two vertical supporting legs respectively, in the working state, the two supporting pieces can be unfolded to be in a horizontal state, and the other ends of the two supporting pieces form a supporting platform; and in a storage state, the two supporting pieces, the two vertical supporting legs and the two transverse supporting legs are folded and stored to be in a mutually parallel state. The portable electronic organ rack disclosed by the invention is stable in structure, simple to store and convenient to carry.

Description

Technical Field

[0001] The present invention relates to the technical field of musical instrument brackets, and more specifically, to a portable electronic keyboard stand. Background Art

[0002] An electronic keyboard is an electronic keyboard musical instrument and belongs to an electronic synthesizer. It uses large-scale integrated circuits and is mostly equipped with a sound memory storage for storing the true sound waveforms of various musical instruments and outputting them during performance, and is widely used. Currently, for the convenience of players, a special bracket is used to support the electronic keyboard for floor support.

[0003] In the prior art, for example, an electronic keyboard stand disclosed in CN213303623U includes a bearing plate and four support legs. When in use, it occupies a large area, and this structure is relatively troublesome to disassemble and not convenient to carry. Additionally, for example, a portable electronic keyboard stand disclosed in patent CN207800122U includes a support plate, a support block, a bottom plate, a first turning ear, an inclined support plate, a bottom panel, a swing support plate, a pin shaft, a U-shaped rod, and a locking assembly; the locking assembly includes a knob, a screw rod, a nut, and a rotating shaft; although this structure is convenient for folding and storing, small in volume, and easy to move, the overall support is only provided by a single bottom panel, resulting in insufficient stability.

[0004] Therefore, it is an urgent problem to be solved to develop an electronic keyboard stand that can ensure stability, be easily stored, and be convenient to carry. Summary of the Invention

[0005] The problem solved by the present invention is to overcome at least one defect in the prior art and provide a portable electronic keyboard stand with stable structure, simple storage, and convenient carrying.

[0006] To solve the above problems, the present invention provides a portable electronic keyboard stand, including

[0007] a base;

[0008] two transverse legs, which are respectively rotatably connected to the base, and the two transverse legs can be horizontally expanded outwards to the working state and folded inwards to the storage state;

[0009] two vertical legs, the lower ends of which are respectively rotatably connected to the base, and the two vertical legs can be vertically expanded upwards to the working state and rotated downwards to the storage state;

[0010] Two support members, one end of each of which is rotatably connected to the upper ends of the two vertical legs respectively. In the working state, the two support members are unfolded to a horizontal state, and the other ends of the two support members extend along the length directions of the two horizontal legs respectively to form a support platform for supporting the electronic piano; in the storage state, the two support members, the two vertical legs and the two horizontal legs are folded and stored in a mutually parallel state.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The bottom support of the portable electronic piano stand of the present invention is realized by two horizontal legs, and the two horizontal legs can be horizontally opened for use and stored and carried. When used in the opened state, it has high stability, and after storage, it occupies a small volume and is convenient to carry; similarly, the vertical support part is also realized by two vertical legs, and support members are respectively arranged on the two vertical legs. In the working state, the two support members are unfolded to form a support platform for supporting the electronic piano, effectively ensuring the stability of the whole frame during use. And in the storage state, the two support members, the two vertical legs and the two horizontal legs can all be folded and stored in a mutually parallel state, that is, the whole frame can be folded together to minimize the packaging volume and is convenient to carry.

[0013] As an improvement, installation grooves are respectively arranged on both sides of the base, one end of each of the two horizontal legs is rotatably connected in the two installation grooves respectively, and locking mechanisms for locking the working states of the two horizontal legs are respectively arranged in the two installation grooves. In the above improved structure, the locking structure is arranged so that when in the working state, the two horizontal legs will not easily rotate after being opened outwards, ensuring the stability of the bottom support.

[0014] Further improved, the locking mechanism includes a locking pin, the locking pin is vertically telescopically arranged on the upper surface of the end of the horizontal leg located in the installation groove, a pin hole is arranged at the top of the installation groove, in the working state, the upper end of the locking pin is fitted in the pin hole, and a first elastic member is arranged at the lower end of the locking pin for driving the locking pin to always have a tendency to move upwards; a push rod that is vertically movable and can extend into the pin hole is arranged on the base. When the push rod is pressed downwards, the push rod is used to drive the locking pin out of the pin hole so that the horizontal leg and the base can rotate relatively. In the above improved structure, locking is carried out through the locking pin, the pin hole and the first elastic member, and unlocking can be realized by pressing the pressing member. The structure is simple and the operation is convenient.

[0015] Further improved, an installation sleeve with a lower opening is provided at a position corresponding to the pin hole on the installation base. A communication hole is provided at the top of the installation sleeve. The lower end of the ejector rod is accommodated in the installation sleeve, and the upper end of the ejector rod movably passes through the communication hole. A limiting step is provided on the outer wall of the ejector rod. The upper end of the ejector rod is connected with a pressing member. A second elastic member is provided between the pressing member and the top of the installation sleeve. Under the action of the second elastic member, the upper end face of the limiting step abuts against the top of the inner cavity of the installation sleeve. In the above improved structure, by providing the second elastic member, the pressing member can quickly reset after the pressing force is eliminated without other operations.

[0016] Further improved, two activity grooves with upper openings are provided at the upper end of the base. A connecting shaft horizontally penetrating through the two activity grooves is provided on the base. The lower ends of the two vertical legs are respectively rotationally connected in the two activity grooves through the connecting shaft. Avoidance notches are provided on one side of the two activity grooves close to the horizontal leg for the vertical legs to rotate and be received in a parallel state with the horizontal leg. In the above improved structure, the two vertical legs are rotationally connected in the two activity grooves, and avoidance notches are provided only on one side. The non-notch side can play a role in supporting and limiting to ensure stability during use, and can ensure being completely parallel to the horizontal leg after being received.

[0017] Further improved, inclined positioning grooves are provided on the side walls of the two activity grooves away from each other. When in the working state, the upper ends of the two vertical legs expand to the left and right to form a V-shaped structure, and the lower ends of the two vertical legs are respectively accommodated in the two positioning grooves. A limiting mechanism for preventing the two vertical legs from approaching each other is further provided on the base. In the above improved structure, the upper ends of the two vertical legs can expand outwards to form a V shape, increasing the range of the support platform without changing the volume of the base and ensuring the support stability.

[0018] Further improved, the limiting mechanism includes two limiting members. An articulated shaft perpendicular to the connecting shaft is provided at the upper end of the base and between the two activity grooves. One ends of the two limiting members are rotationally connected to the articulated shaft, and the other ends respectively abut against and limit the opposite sides of the lower ends of the two vertical legs. In the above improved structure, the two vertical legs will not easily rotate when expanding to the left and right under the action of the limiting members, ensuring the support stability.

[0019] In a further improvement, damping blocks that are vertically movable are provided at the bottoms of the two movable slots. Third elastic members are provided between the lower ends of the two damping blocks and the bottoms of the respective movable slots, so that the damping blocks always have a tendency to move upward to abut against the lower ends of the vertical legs. The provision of the damping blocks in the above improvement structure enables the two vertical legs to overcome the spring force of the third elastic member whether they are opened at an angle to the left and right or unfolded and stored in the front and back directions. That is, each action has a certain damping effect, and the vertical legs will not easily tip over, facilitating rotational operations in all directions.

[0020] In a further improvement, the support members are hollow circular tubes, and two washers that are rotatable along their own axes are sleeved on the outer walls of the two support members to form two sets of support points that are opposite to each other in pairs and are used to support the electronic organ; the outer peripheral walls of at least one set of washers disposed oppositely on the two support members are eccentric structures. In the above improvement structure, the stability is ensured by providing the support washers, and the outer peripheral walls of one set of symmetric washers are eccentric structures. The height of the support surface can be adjusted by rotating the washers.

[0021] In a further improvement, detachable stoppers for limiting the electronic organ are connected to the ends of the two support members away from the vertical legs. In the above improvement structure, after the stoppers are added, they are used to block the side of the electronic organ away from the performer, preventing the electronic organ from falling off the support members and improving the safety of use.

[0022] Other improvement features and advantages of the present invention will be described in the subsequent specific embodiments, and some will be obvious from the description or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a perspective view of the portable electronic organ stand of the present invention in the working state;

[0024] Figure 2 is a perspective view of the portable electronic organ stand of the present invention in the stored state;

[0025] Figure 3 is a partial schematic view of the connection structure of the vertical legs, horizontal legs and base in the present invention;

[0026] Figure 4 is another partial schematic view of the connection structure of the vertical legs, horizontal legs and base in the present invention from another angle;

[0027] Figure 5 is a partial cross-sectional view of the connection structure of the horizontal legs and the base in the present invention;

[0028] Figure 6 For Figure 5 the enlarged structural diagram at position X in

[0029] Figure 7 is the partial cross-sectional view of the connection structure between the vertical leg, horizontal leg and base in the present invention;

[0030] Figure 8 is the cross-sectional view of the connection structure between the stop member and the support member in the present invention;

[0031] Figure 9 is the partial schematic diagram of the working state of the connection structure between the support member and the vertical leg in the present invention;

[0032] Figure 10 is the partial schematic diagram of the storage state of the connection structure between the support member and the vertical leg in the present invention.

[0033] Explanation of reference numerals:

[0034] 1. Base; 2. Horizontal leg; 3. Vertical leg; 4. Support member; 5. Installation groove; 6. Locking pin; 7. Pin hole; 8. First elastic member; 9. Push rod; 10. Installation sleeve; 11. Limiting step; 12. Pressing member; 13. Second elastic member; 14. Activity groove; 15. Connecting shaft; 16. Avoidance notch; 17. Positioning groove; 18. Limiting member; 19. Hinge shaft; 20. Damping block; 21. Third elastic member; 22. Washer; 23. Stop baffle; 24. Elastic sleeve; 25. Hole enlarging member; 26. Adjusting screw; 27. Fourth elastic member; 28. First connecting block; 29. Second connecting block; 30. Fixed outer tube; 31. Lifting inner tube; 32. Positioning insertion hole; 33. Positioning knob; 34. Pin shaft; 35. Wear-resistant plate; 36. Installation through hole; 37. First connecting seat; 38. Second connecting seat; 39. Locking knob; 40. Locking groove. Detailed implementation manners

[0035] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper end", "lower end", "outer wall", "inside and outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific situations.

[0038] As Figure 1 , 2 shown, the present invention provides a portable electronic piano stand, which includes a base 1, two horizontal legs 2, two vertical legs 3 and two support members 4; one end of each of the two horizontal legs 2 is rotatably connected to the base 1 in the horizontal direction, so that the two horizontal legs 2 can be horizontally opened outwards to the working state angle or folded inwards to the storage state; similarly, the lower ends of the two vertical legs 3 are respectively rotatably connected to the base 1, and the two vertical legs 3 can be rotated upwards along the vertical direction to the working state and rotated downwards to the storage state; again, one end of each of the two support members 4 is rotatably connected to the upper ends of the two vertical legs 3. In the working state, the two support members 4 can be rotated and unfolded to the horizontal state, and the other ends of the two support members 4 respectively extend along the length direction of the two horizontal legs 2 to form a support platform for supporting the electronic piano; in the storage state, the two support members 4, the two vertical legs 3 and the two horizontal legs 2 are folded and stored in a parallel state. When not in use, the entire mechanism can be completely folded and stored, minimizing the volume as much as possible for convenient packaging and carrying.

[0039] The following specifically describes the connection relationship of each component and the movement process of the working state and the storage state.

[0040] As Figures 3 - 6 shown, mounting grooves 5 are respectively arranged on both sides of the base 1, and in this structure, the two mounting grooves 5 are only open at the front end, and the open end is a fan-shaped structure, which is convenient for the horizontal rotation of the two horizontal legs 2. Specifically, there are pin shafts 34 extending vertically at the bottoms of the two mounting grooves 5. Because in order to reduce weight, the horizontal legs 2 generally adopt hollow pipes, and the connection of the end parts of this structure is inconvenient, so first connection blocks 28 are respectively connected to the end parts of the two horizontal legs 2. The ends of the two first connection blocks 28 away from the horizontal legs 2 are accommodated in the mounting grooves 5 and rotatably connected to the outside of the corresponding pin shafts 34, that is, the two horizontal legs 2 can respectively rotate left and right around the two pin shafts 34; in addition, in order to ensure that when in the working state, the two horizontal legs 2 will not easily rotate after being opened outwards, and to ensure the stability of the bottom support, in this structure, locking mechanisms for locking the working state of the two horizontal legs 2 are respectively arranged in the two mounting grooves 5.

[0041] In this embodiment, the locking mechanism includes a locking pin 6. The locking pin 6 is vertically telescopically arranged on the upper surface of one end of the transverse leg 2 located in the mounting groove 5. Specifically, mounting holes are provided at the upper ends of two first connecting blocks 28, and the two locking pins 6 are respectively slidably fitted in the two mounting holes. Correspondingly, pin holes 7 are provided at positions corresponding to the narrowing at the top of the mounting groove 5. In the working state, the transverse leg 2 rotates outward to a set angle, and the upper end of the pin shaft 34 is fitted in the pin hole 7. With this structure, the two points of the locking pin 6 and the pin shaft 34 form a constraint, and the first connecting block 28 cannot continue to rotate in the mounting groove 5. Additionally, in the above structure, to ensure the stability of the fitting between the locking pin 6 and the pin hole 7, a first elastic member 8 is provided at the lower end of the locking pin 6 to always drive the locking pin 6 to move upward. Specifically, the lower end of the first elastic member 8 is accommodated in the mounting hole, and a receiving hole is provided at the lower end of the locking pin 6. The upper end of the first elastic member 8 is fitted in the receiving hole, ensuring the stability of the first elastic member 8 during operation under the action of elastic drive. Preferably, the first elastic member 8 is a cylindrical spring. In other embodiments, the first elastic member 8 can also be in other forms of structures, such as a gas spring or a rubber bellows, etc.

[0042] Additionally, to enable the locking pin 6 to be easily unlocked when the transverse leg 2 is retracted, a top rod 9 that is vertically movable and can extend into the pin hole 7 is provided on the base 1. When the top rod 9 is pressed downward, the top rod 9 can drive the locking pin 6 to move downward, overcoming the elastic force of the first elastic member 8 until the upper end of the locking pin 6 completely disengages from the pin hole 7. After unlocking, the transverse leg 2 and the base 1 can rotate relative to each other. In this structure, whether the transverse leg 2 needs to be rotationally expanded to the working state for limiting and locking or the transverse leg 2 needs to be rotationally retracted for unlocking, it is achieved by pressing the top rod 9.

[0043] More specifically, in the above structure, a mounting sleeve 10 with a lower opening is provided at the position corresponding to the pin hole 7 on the mounting seat. A communication hole is provided at the top of the mounting sleeve 10. The lower end of the top rod 9 is accommodated in the mounting sleeve 10, and the upper end of the top rod 9 movably passes through the communication hole. A limiting step 11 is provided on the outer wall of the top rod 9. The upper end of the top rod 9 is connected with a pressing member 12. A second elastic member 13 is provided between the pressing member 12 and the top of the mounting sleeve 10, and under the action of the second elastic member 13, the upper end surface of the limiting step 11 abuts against the top of the inner cavity of the mounting sleeve 10. That is, when the pressing member 12 is driven downward, the top rod 9 overcomes the elastic force of the second elastic member 13 to drive the locking pin 6 to move downward for unlocking. After the force on the pressing member 12 is eliminated, under the restoring force of the second elastic member 13, the pressing member 12 automatically resets upward, thereby driving the top rod 9 to reset upward to the initial position. Similarly, the second elastic member 13 in this structure is preferably a cylindrical spring. In other embodiments, the second elastic member 13 can also be in other forms of structures, such as a gas spring or a rubber bellows, etc.

[0044] In this embodiment, as Figure 5 , 6 shown, since the lateral legs 2 need to rotate frequently, in order to reduce the wear between the upper end surface of the first connecting block 28 and the top of the mounting groove 5, a wear-resistant plate 35 is added at a position on the upper end surface of the first connecting block 28 close to the pin shaft 34 to improve wear resistance and extend the service life.

[0045] In this embodiment, as Figure 1 shown, at the lower end of the base 1 and the lower ends of the two lateral legs 2, support feet with adjustable height are connected to ensure the stability of the entire electronic piano stand when placed on the ground.

[0046] As Figure 7 shown, in this embodiment, two upper-open movable grooves 14 are provided at the upper end of the base 1, and a connecting shaft 15 is horizontally arranged on the base 1 and passes through the two movable grooves 14. The lower ends of the two vertical legs 3 are respectively rotatably connected to the two movable grooves 14 through the connecting shaft 15. Additionally, on one side of the two movable grooves 14 close to the lateral legs 2, avoidance notches 16 are provided for the vertical legs 3 to rotate and be received in a parallel state with the lateral legs 2. That is, the two vertical legs 3 can rotate towards one side of the lateral legs 2 to a parallel position, and at this time, the lower ends of the two vertical legs 3 are received in the corresponding avoidance notches 16.

[0047] Additionally, in order to increase the stability of the support structure and the distance between the two support members 4, inclined positioning grooves 17 are provided on the side walls of the two movable grooves 14 away from each other. In the working state, the two vertical legs 3 move outward and unfold at a certain angle. Specifically, the upper ends of the two vertical legs 3 unfold to the left and right to form a V-shaped structure, and the lower ends of the two vertical legs 3 are respectively received in the two positioning grooves 17 for positioning, and a limiting mechanism is also provided on the base 1 to prevent the two vertical legs 3 from approaching each other. Here, "outward" means the direction in which the two vertical legs 3 are away from each other, specifically along the axial direction of the connecting shaft 15. This makes the two vertical legs 3 form a V shape, increasing the range of the support platform without changing the volume of the base 1 and ensuring the support stability.

[0048] In this embodiment, in order to enable the two vertical legs 3 to move away from each other, some details are processed; because in order to reduce weight, the vertical legs 3 generally use hollow pipes, and this structure is inconvenient for end connection, so second connecting blocks 29 are inserted at the lower ends of the two vertical legs 3. Installation through holes 36 for the connecting shaft 15 to pass through are provided on the two second connecting blocks 29, and the vertical dimensions of the two installation through holes 36 gradually increase in the direction away from each other to form a structure with a conical vertical cross-section, as Figure 7As shown, when the vertical support leg 3 moves outward horizontally, it will not be interfered by the connecting shaft 15.

[0049] In addition, the limiting mechanism involved in the above structure includes two limiting members 18. A hinge shaft 19 vertically arranged with the connecting shaft 15 is arranged at the upper end of the base 1 and between the two movable grooves 14. One end of the two limiting members 18 is rotatably connected to the hinge shaft 19, and the other end is respectively abutted and limited on the opposite side of the lower end of the two vertical legs 3. In this structure, the two limiting members 18 can rotate around the hinge shaft 19. More specifically, the two limiting members 18 here can rotate downward by themselves under the action of their own gravity until they abut against the opposite inner side walls of the two second connecting blocks 29, thereby preventing the two vertical legs 3 from getting close to each other and affecting the support stability of the electronic keyboard. In order to allow the two limit members 18 to be easily released from the limit, manual shift blocks are provided at both ends of the two limit members 18. When the two vertical legs 3 need to be rotated and stored, the two limit members 18 need to be rotated upwards first to release the limit. At this time, the two vertical legs 3 can move closer to each other to the positions where the two second connecting blocks 29 correspond to the two avoidance notches 16. At this time, the two second connecting blocks 29 can be rotated around the connecting shaft 15 toward the direction of the horizontal leg 2 to a storage state parallel to it.

[0050] In the above structure, since the two vertical legs 3 and the connecting shaft 15 are flexibly matched, the two vertical legs 3 are very flexible when they are unfolded or brought together in the left-right direction, or when they are rotated and stored in the front-back direction. That is, they will fall over with a slight push, which requires the user to hold the legs with their hands at all times during operation, which is not very convenient. The front-back, left-right, and right-left here are for the convenience of understanding. Figure 4 The directions and positions indicated in the drawings do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] To this end, in this embodiment, a vertically movable damping block 20 is provided at the bottom of the two movable grooves 14. Specifically, Figure 7As shown, inner grooves are provided at the bottoms of the two movable slots 14. The damping blocks 20 are vertically movably installed in the inner grooves, and a third elastic member 21 is provided between the lower end surface of each damping block 20 and the bottom of the inner groove, so that the damping blocks 20 always have a tendency to move upward to abut against the lower ends of the vertical legs 3. Through the arrangement of the damping blocks 20, when the two vertical legs 3 are opened at an angle or expanded and stored in the left - right or front - back directions, the spring force of the third elastic member 21 needs to be overcome first. That is, each action has a certain damping effect, and the vertical legs 3 will not easily tip over, facilitating the rotational operation in all directions. In this structure, for the convenience of installation and space optimization, installation channels corresponding to the positions of the two inner grooves are provided at the bottom of the base 1 and communicate with the inner grooves. The third elastic member 21 is accommodated in the installation channel, and the outer end of the installation channel is blocked by a threaded plug. The lower end of the third elastic member abuts against the threaded plug, and the upper end abuts against the lower end surface of the damping member.

[0052] In addition, as Figure 1 , 8 shown, in this embodiment, the support member 4 is a hollow circular tube. Two washers 22 that can rotate along their own axes are sleeved on the outer walls of the two support members 4 to form two groups of support points that are pairwise opposite and used to support the electronic piano; the outer peripheral walls of at least one group of washers 22 arranged oppositely on the two support members 4 are eccentric structures. After such an arrangement, the parallelism of the electronic piano can be easily adjusted by rotating the washers 22 with eccentric structures, which is very convenient. More importantly, in this structure, in order to increase the stability of the electronic piano on the support member 4, a plurality of convex ribs extending axially along the circumference are formed on the outer peripheral wall of each washer 22.

[0053] On the other hand, in this embodiment, stoppers for limiting the electronic piano are detachably connected to the ends of the two transverse support members 4 away from the vertical legs 3. As Figure 8As shown, specifically, the stop portion here includes a stop plate 23. An elastic sleeve 24 is provided on one side of the stop plate 23 close to the support member 4. A reaming member 25 is inserted at one end of the elastic sleeve 24 away from the stop plate 23. The outer peripheral wall of the reaming member 25 is a conical surface. As the reaming member 25 moves toward the stop plate 23, under the action of the conical surface, the outer diameter of the elastic sleeve 24 expands. Specifically, an adjusting screw 26 is provided on the side of the stop plate 23 away from the elastic sleeve 24. A threaded hole is provided on the reaming member 25. One end of the adjusting screw 26 passes through the stop plate 23 and is threadedly connected in the threaded hole. That is, by screwing the adjusting screw 26, the axial movement of the reaming member 25 can be realized, so as to realize the increase of the outer diameter of the elastic sleeve 24. In this structure, when installing, first loosen the adjusting screw 26. The outer diameter of the elastic sleeve 24 is smaller than the inner diameter of the hollow round tube. At this time, both the reaming member 25 and the elastic sleeve 24 can be inserted into the hollow round tube. Then screw the adjusting screw 26 to drive the reaming member 25 to axially move toward the stop plate 23. Under the action of its conical outer wall, the outer diameter of the elastic sleeve 24 is expanded until it is tightly supported and limited against the inner wall of the hollow round tube, and easy disassembly and assembly with the hollow round tube can be realized without other fasteners. More specifically, in this structure, a fourth elastic member 27 is further provided between the reaming member 25 and the stop plate 23, so that when the adjusting screw 26 is screwed in the reverse direction, under the action of the fourth elastic member 27, the reaming member 25 can automatically move away from the stop plate 23 and reset, that is, it can be easily taken out from the hollow round tube. The fourth elastic member 27 here is a cylindrical spring.

[0054] As Figure 9 , 10 shown, a first connecting seat 37 is connected to the top of each vertical leg 3. A second connecting seat 38 is connected to the end of the support member 4 away from the stop member, and the second connecting seat 38 is arranged parallel to the support member 4. One end of the first connecting seat 37 and the second connecting seat 38 are rotatably connected by a hinge. When in the working state, the first connecting seat 37 is arranged horizontally. The second connecting seat 38 is horizontally abutted against the upper end surface of the first connecting seat 37 so that the support member 4 is arranged horizontally for the electronic piano to be horizontally placed and positioned. More specifically, in this structure, a locking knob 39 is provided on the outer wall of the first connecting seat 37, and a locking groove 40 is provided on the second connecting seat 38. When in the working state, when the second connecting seat 38 is horizontally abutted against the upper end surface of the first connecting seat 37, the connecting rod of the locking knob is received in the locking groove 40, and the end surface of the locking knob abuts against the outer end surface of the locking groove 40 to realize the locking and limiting of the first connecting seat 37 and the second connecting seat 38.

[0055] More specifically, in order to facilitate the height adjustment of the electronic organ in this embodiment, both of the two vertical legs 3 are height-adjustable lifting legs, specifically including a fixed outer tube 30 and a lifting inner tube 31. The lower end of the lifting inner tube 31 is slidably fitted inside the supporting outer tube, and the first connecting seat 37 is fixed to the top of the lifting inner tube 31; as Figure 1 shown, a number of positioning jacks 32 arranged axially are provided on the outer wall of the lifting inner tube 31, and a positioning knob 33 is provided on the upper side wall of the fixed outer tube 30. The height adjustment is achieved through the cooperation of the positioning knob 33 and the positioning jacks 32 at the corresponding height, which is very convenient.

[0056] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A portable electronic keyboard stand, characterized in that, It includes: a base (1); two transverse legs (2), which are respectively rotatably connected to the base (1), and the two transverse legs (2) can be horizontally unfolded outward to the working state and folded inward to the storage state; two vertical legs (3), the lower ends of which are respectively rotatably connected to the base (1), and the two vertical legs (3) can be vertically unfolded upward to the working state and rotated downward to the storage state; two supports (4), one ends of which are respectively rotatably connected to the upper ends of the two vertical legs (3). In the working state, the two supports (4) are unfolded to the horizontal state, and the other ends of the two supports (4) respectively extend along the length directions of the two transverse legs (2) to form a support platform for supporting an electronic piano; in the storage state, the two supports (4), the two vertical legs (3) and the two transverse legs (2) are folded and stored in a parallel state.

2. The portable electronic keyboard stand according to claim 1, wherein: Installation grooves (5) are respectively arranged on both sides of the base (1), one ends of the two transverse legs (2) are respectively rotatably connected in the two installation grooves (5), and locking mechanisms for locking the working states of the two transverse legs (2) are respectively arranged in the two installation grooves (5).

3. The portable electronic keyboard stand according to claim 2, wherein: The locking mechanism includes a locking pin (6), the locking pin (6) is vertically telescopic and arranged on the upper surface of one end of the transverse leg (2) located in the installation groove (5), a pin hole (7) is arranged at the top of the installation groove (5), in the working state, the upper end of the locking pin (6) is fitted in the pin hole (7), and a first elastic member (8) is arranged at the lower end of the locking pin (6) for driving the locking pin (6) to always have a tendency to move upward; a ejector rod (9) which is vertically movable and can extend into the pin hole (7) is arranged on the base (1), when the ejector rod (9) is pressed downward, the ejector rod (9) is used for driving the locking pin (6) to disengage from the pin hole (7) so that the transverse leg (2) and the base (1) can rotate relative to each other.

4. The portable electronic keyboard stand according to claim 3, wherein: An installation sleeve (10) with a lower opening is arranged at the position corresponding to the pin hole (7) on the installation base, a communication hole is opened at the top of the installation sleeve (10), the lower end of the ejector rod (9) is accommodated in the installation sleeve (10), the upper end of the ejector rod (9) movably passes through the communication hole, and a limiting step (11) is arranged on the outer wall of the ejector rod (9); a pressing member (12) is connected to the upper end of the ejector rod (9), a second elastic member (13) is arranged between the pressing member (12) and the top of the installation sleeve (10), and under the action of the second elastic member (13), the upper end surface of the limiting step (11) abuts against the top of the inner cavity of the installation sleeve (10).

5. The portable electronic keyboard stand according to any one of claims 1 to 4, characterized in that: Two upper-open movable slots (14) are provided at the upper end of the base (1). A connecting shaft (15) is horizontally arranged on the base (1) and passes through the two movable slots (14). The lower ends of the two vertical legs (3) are respectively rotatably connected in the two movable slots (14) through the connecting shaft (15). Avoidance notches (16) are provided on one side of the two movable slots (14) close to the horizontal leg (2) for the vertical legs (3) to be rotatably received to be parallel to the horizontal leg (2).

6. The portable electronic keyboard stand according to claim 5, wherein: Inclined positioning grooves (17) are provided on the side walls of the two movable slots (14) away from each other. In the working state, the upper ends of the two vertical legs (3) expand to the left and right to form a V-shaped structure, and the lower ends of the two vertical legs (3) are respectively accommodated in the two positioning grooves (17). A limiting mechanism is further provided on the base (1) to prevent the two vertical legs (3) from approaching each other.

7. The portable electronic keyboard stand according to claim 6, wherein: The limiting mechanism includes two limit members (18). An articulated shaft (19) perpendicular to the connecting shaft (15) is arranged at the upper end of the base (1) and between the two movable slots (14). One ends of the two limit members (18) are rotatably connected to the articulated shaft (19), and the other ends respectively abut and limit on the opposite sides of the lower ends of the two vertical legs (3).

8. The portable electronic keyboard stand according to claim 6, wherein: Damping blocks (20) that can move vertically are provided at the bottoms of the two movable slots (14). Third elastic members (21) are provided between the lower ends of the two damping blocks (20) and the bottoms of the respective movable slots (14) so that the damping blocks (20) always have a tendency to move upward to abut against the lower ends of the vertical legs (3).

9. The portable electronic keyboard stand according to claim 1, wherein: The support members (4) are hollow circular tubes. Two washers (22) that can rotate along their own axes are sleeved on the outer walls of the two support members (4) to form two sets of support points that are opposite to each other in pairs and are used to support the electronic piano; the outer peripheral walls of at least one set of washers (22) arranged oppositely on the two support members (4) are eccentric structures.

10. The portable electronic keyboard stand according to claim 1 or 9, characterized in that: Stop portions for limiting the electronic piano are detachably connected to the ends of the two support members (4) away from the vertical legs (3).

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