Vertical piano back frame with high bearing capacity

Abstract

The utility model relates to the technical field of pianos, and discloses a vertical piano back frame with high bearing capacity, which comprises a piano main body, two cross rods and two groups of vertical rods, the side surfaces of the two cross rods, which are far away from each other, are contacted with the inner wall of the piano main body, and the outer surfaces of the two vertical rods are contacted with the inner wall of the piano main body. The side faces, away from each other, of the vertical rods are fixedly connected with the outer surface of the transverse rod, two limiting rods are jointly and fixedly installed on the inner walls of the two sets of vertical rods, a connecting groove is formed in the back face of each transverse rod, two clamping grooves are formed in the back face of each vertical rod, and a trapezoid rod is slidably connected into each connecting groove. The outer surface of each trapezoidal rod is in contact with the inner wall of the corresponding clamping groove; by arranging the transverse rods, the vertical rods, the limiting rods, the connecting grooves, the clamping grooves, the trapezoid rods, the connecting springs, the movable plates and the limiting columns, the effect of limiting and fixing the connecting positions of the transverse rods and the vertical rods is achieved, and therefore the bearing capacity of the back frame is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of pianos, in particular to an upright piano back frame with high load-bearing capacity. Background Art

[0002] The piano back is an important part of the entire piano. It affects the sound quality and appearance of the entire piano. The piano back is assembled by the back frame and the columns through mortise and tenon joints.

[0003] When the existing upright piano back frames are in use, most of them do not have a limiting and fixing structure between the back frame and the uprights. Therefore, when the back frame is in use, the strings will generate a large pulling force on the back frame. After long-term use, the uprights are prone to bending and deformation, and the connection between the uprights and the back frame is prone to loosening, which in turn causes the bearing capacity of the back frame to decrease. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a vertical piano back frame with high load-bearing capacity, which has the function of limiting and fixing the back frame and the uprights, and has the advantage of avoiding loose connection between the uprights and the back frame as much as possible.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vertical piano back frame with high load-bearing capacity, comprising a piano body, two cross bars and two groups of vertical bars, the side surfaces of the two cross bars away from each other are in contact with the inner wall of the piano body, wherein the outer surfaces of the two vertical bars are in contact with the inner wall of the piano body, and the side surfaces of each vertical bar away from each other are fixedly connected to the outer surface of the cross bar, and the inner walls of the two groups of vertical bars are jointly fixedly installed with two limiting rods, the back side of each cross bar is provided with a connecting groove, the back side of each vertical bar is provided with two clamping grooves, the interior of each connecting groove is slidably connected with a ladder rod, the outer surface of each ladder rod is in contact with the inner wall of the clamping groove, and the front sides of the other two vertical bars are fixedly installed with two groups of connecting springs, the end of each group of connecting springs away from the vertical bar is fixedly installed with a moving plate, the back side of each moving plate is fixedly installed with a limiting column, and the end of each limiting column away from the moving plate passes through the vertical bar and extends to the interior of the ladder rod.

[0008] Preferably, two sets of universal wheels are fixedly mounted on the bottom surface of the piano body, and a brake pad is fixedly mounted on the outer surface of each universal wheel.

[0009] Preferably, two connecting ears are fixedly installed on the front side of each cross bar, and a fixing bolt is threadedly connected to the interior of each connecting ear, and one end of each fixing bolt close to the piano body passes through the connecting ear and extends to the interior of the piano body.

[0010] Preferably, two groups of telescopic rods are fixedly mounted on the front sides of the other two uprights, and the telescopic end of each telescopic rod is fixedly connected to the back side of the movable plate.

[0011] Preferably, a connecting column is fixedly mounted on the front side of each movable plate, and a pull ring is rotatably connected inside each connecting column.

[0012] Preferably, two groups of connecting rods are fixedly mounted on the inner wall of the piano body, and a placement rack is fixedly mounted on the front sides of the two groups of connecting rods.

[0013] Preferably, a movable stool is provided on the back of the piano body, and two movable rods are fixedly installed on the front of the movable stool, and each of the movable rods is slidably connected to the inside of the piano body.

[0014] Preferably, a sponge pad is fixedly mounted on the upper surface of the movable stool, and a key cover is movably hinged inside the piano body.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides an upright piano back frame with high load-bearing capacity, which has the following beneficial effects: the upright piano back frame with high load-bearing capacity, by providing a piano body, a cross bar and an upright bar, achieves the purpose of assisting the cast iron plate in supporting the tension of the strings; by providing a limit rod, the limit rod is used to limit the upright bar, so as to avoid deformation and bending of the upright bar when the strings exert a large pulling force on the back frame as much as possible, thereby ensuring good load-bearing capacity of the back frame; by providing a connecting groove, a clamping groove, a ladder-shaped rod, a connecting spring, a movable plate and a limit column, the ladder-shaped rod is clamped in the connecting groove and the clamping groove, and the elastic force of the connecting spring is used to fix the ladder-shaped rod with the limit column, thereby avoiding loosening of the connection between the upright bar and the cross bar as much as possible, thereby further strengthening the load-bearing capacity of the back frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the piano main body of the utility model;

[0018] Figure 2 It is a three-dimensional structural diagram of the crossbar of the utility model;

[0019] Figure 3 It is a three-dimensional structural diagram of the rear view of the crossbar of the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of a cross-sectional view of the movable plate of the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of a rear sectional view of a piano main body of the utility model.

[0022] In the figure: 1. Piano body; 2. Crossbar; 3. Vertical bar; 4. Limit rod; 5. Connecting groove; 6. Snap-in groove; 7. Ladder rod; 8. Connecting spring; 9. Moving plate; 10. Limit column; 11. Universal wheel; 12. Brake pad; 13. Connecting ear; 14. Fixing bolt; 15. Telescopic rod; 16. Connecting column; 17. Pull ring; 18. Connecting rod; 19. Placement rack; 20. Moving stool; 21. Moving rod; 22. Sponge pad; 23. Key cover. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below with reference to the accompanying drawings.

[0024] See also Figure 1-5 The utility model discloses a vertical piano back frame with high load-bearing capacity, comprising a piano body 1, two cross bars 2 and two groups of vertical bars 3, wherein the side surfaces of the two cross bars 2 that are away from each other are in contact with the inner wall of the piano body 1, wherein the outer surfaces of the two vertical bars 3 are in contact with the inner wall of the piano body 1, and the side surfaces of each vertical bar 3 that are away from each other are fixedly connected to the outer surface of the cross bar 2, and two limit rods 4 are fixedly installed on the inner walls of the two groups of vertical bars 3, and the back of each cross bar 2 is provided with a connecting groove 5, and the back of each vertical bar 3 is provided with two clamping grooves 6, the interior of each connecting groove 5 is slidably connected with a ladder rod 7, the outer surface of each ladder rod 7 is in contact with the inner wall of the clamping groove 6, and the front faces of the other two vertical poles 3 are fixedly installed with two groups of connecting springs 8, and the end of each group of connecting springs 8 away from the vertical pole 3 is fixedly installed with a movable plate 9, and the back of each movable plate 9 is fixedly installed with a limiting column 10, and the end of each limiting column 10 away from the movable plate 9 penetrates the vertical pole 3 and extends to the interior of the ladder rod 7, the number of each group of vertical poles 3 is two, and the number of each group of connecting springs 8 is four.

[0025] Two sets of universal wheels 11 are fixedly installed on the bottom surface of the piano body 1, and a brake pad 12 is fixedly installed on the outer surface of each universal wheel 11. The universal wheels 11 are used to facilitate users to move the device, thereby increasing the convenience of moving the device. The installation of the brake pads 12 plays a role in locking the universal wheels 11, thereby minimizing the phenomenon of the universal wheels 11 rotating on their own, thereby ensuring the stability of the universal wheels 11.

[0026] Two connecting ears 13 are fixedly installed on the front side of each cross bar 2, and a fixing bolt 14 is threadedly connected to the interior of each connecting ear 13. The end of each fixing bolt 14 close to the piano body 1 passes through the connecting ear 13 and extends to the interior of the piano body 1. The installation of the connecting ears 13 and the fixing bolts 14 plays a role in fixing the cross bar 2 inside the piano body 1, thereby avoiding the cross bar 2 from moving on its own as much as possible, thereby ensuring the stability of the cross bar 2.

[0027] Two sets of telescopic rods 15 are fixedly installed on the front sides of the other two vertical poles 3. The telescopic end of each telescopic rod 15 is fixedly connected to the back side of the movable plate 9. The installation of the telescopic rods 15 serves to limit the moving trajectory of the movable plate 9, thereby avoiding the phenomenon of the movable plate 9 deviating from the moving trajectory during movement as much as possible, thereby ensuring the stability of the movement of the movable plate 9.

[0028] A connecting column 16 is fixedly installed on the front of each movable plate 9, and a pull ring 17 is rotatably connected to the inside of each connecting column 16. The installation of the connecting column 16 and the pull ring 17 makes it convenient for workers to pull the movable plate 9, thereby increasing the convenience of workers' operation.

[0029] Two groups of connecting rods 18 are fixedly installed on the inner wall of the piano body 1, and a placement rack 19 is fixedly installed on the front of the two groups of connecting rods 18. The installation of the connecting rods 18 and the placement rack 19 plays the role of placing music scores, thereby facilitating users to view the music scores, thereby increasing the practicality of the device.

[0030] A movable stool 20 is arranged on the back of the piano body 1, and two movable rods 21 are fixedly installed on the front of the movable stool 20. Each movable rod 21 is slidably connected to the inside of the piano body 1. The arrangement of the movable stool 20 and the movable rod 21 does not require the user to find a seat stool separately, thereby increasing the convenience of using the device.

[0031] A sponge pad 22 is fixedly installed on the upper surface of the movable stool 20, and a key cover 23 is movably hinged inside the piano body 1. The installation of the sponge pad 22 increases the comfort of the movable stool 20, and the installation of the key cover 23 plays a role in protecting the piano keys.

[0032] The working principle of the utility model is as follows: first, the worker pulls the pull ring 17, so that the pull ring 17 cooperates with the connecting column 16 to drive the movable plate 9 to move to the side away from the vertical pole 3, so that the movable plate 9 drives the limiting rod 4 to slide away from the inside of the vertical pole 3, and then the worker inserts the ladder rod 7 into the inside of the connecting groove 5 and the clamping groove 6, and then the worker loosens the pull ring 17, so that the movable plate 9 drives the limiting column 10 to be inserted into the inside of the ladder rod 7 under the action of the elastic force of the connecting spring 8, thereby realizing the fixed connection between the ladder rod 7 and the vertical pole 3. The ladder-shaped rod 7 limits and fixes the connection between the crossbar 2 and the vertical rod 3, and tries to avoid the crossbar 2 and the vertical rod 3 from loosening, thereby ensuring the good bearing capacity of the back frame. After that, the worker fixes the crossbar 2 inside the piano body 1 through the fixing bolts 14 and the connecting ears 13, so that when the strings exert a large pulling force on the back frame, the limit rod 4 and the ladder-shaped rod 7 limit and fix the crossbar 2 and the vertical rod 3, and try to avoid the crossbar 2 and the vertical rod 3 from deformation and bending, thereby ensuring the good bearing capacity of the back frame.

[0033] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-load-bearing upright piano back frame, comprising a piano body (1), two cross bars (2) and two sets of upright bars (3), characterized in that: The side surfaces of the two cross bars (2) that are away from each other are in contact with the inner wall of the piano body (1), wherein the outer surfaces of the two vertical bars (3) are in contact with the inner wall of the piano body (1), and the side surfaces of each vertical bar (3) that are away from each other are fixedly connected to the outer surface of the cross bar (2), and two limit rods (4) are fixedly installed on the inner walls of the two groups of vertical bars (3), and the back of each cross bar (2) is provided with a connecting groove (5), and the back of each vertical bar (3) is provided with two clamping grooves (6), and each connecting groove ( The interior of each of the vertical rods (5) is slidably connected with a ladder rod (7), the outer surface of each of the ladder rods (7) contacts the inner wall of the clamping groove (6), and the front faces of the other two vertical rods (3) are fixedly installed with two groups of connecting springs (8), and the end of each group of connecting springs (8) away from the vertical rod (3) is fixedly installed with a moving plate (9), and the back of each of the moving plates (9) is fixedly installed with a limiting column (10), and the end of each of the limiting columns (10) away from the moving plate (9) penetrates the vertical rod (3) and extends to the interior of the ladder rod (7).

2. The upright piano back frame with high load-bearing capacity according to claim 1, characterized in that: Two sets of universal wheels (11) are fixedly mounted on the bottom surface of the piano body (1), and a brake pad (12) is fixedly mounted on the outer surface of each universal wheel (11).

3. The upright piano back frame with high load-bearing capacity according to claim 1, characterized in that: Two connecting ears (13) are fixedly mounted on the front of each cross bar (2), and a fixing bolt (14) is threadedly connected inside each connecting ear (13), and one end of each fixing bolt (14) close to the piano body (1) passes through the connecting ear (13) and extends into the inside of the piano body (1).

4. The upright piano back frame with high load-bearing capacity according to claim 1, characterized in that: Two groups of telescopic rods (15) are fixedly mounted on the front sides of the other two upright poles (3), and the telescopic end of each telescopic rod (15) is fixedly connected to the back side of the movable plate (9).

5. The upright piano back frame with high load-bearing capacity according to claim 1, characterized in that: A connecting column (16) is fixedly mounted on the front side of each movable plate (9), and a pull ring (17) is rotatably connected inside each connecting column (16).

6. The upright piano back frame with high load-bearing capacity according to claim 1, characterized in that: Two groups of connecting rods (18) are fixedly installed on the inner wall of the piano body (1), and a placement rack (19) is fixedly installed on the front sides of the two groups of connecting rods (18).

7. The upright piano back frame with high load-bearing capacity according to claim 1, characterized in that: A movable stool (20) is arranged on the back of the piano body (1), and two movable rods (21) are fixedly installed on the front of the movable stool (20), and each movable rod (21) is slidably connected to the inside of the piano body (1).

8. The upright piano back frame with high load-bearing capacity according to claim 7, characterized in that: A sponge pad (22) is fixedly mounted on the upper surface of the movable stool (20), and a key cover (23) is movably hinged inside the piano body (1).

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