Bidirectional slow descending mechanism for piano key cover

Abstract

The utility model provides a piano key cover two-way slow descending mechanism which comprises a piano frame, and a left side arm plate and a right side arm plate are correspondingly arranged on the two sides of the top of the piano frame respectively. Key cover connecting plates are rotationally mounted on the inner side walls of the left side arm plate and the right side arm plate through key cover rotating shafts respectively, and key covers are fixedly mounted on the outer walls of the two key cover connecting plates; a half gear is fixedly installed on the side wall of the key cover connecting plate, the half gear is in meshing transmission with a descent control device gear on an output shaft of a damping descent control device, and the damping descent control device is fixedly installed on the inner side wall of the corresponding left side arm plate and the inner side wall of the corresponding right side arm plate. According to the bidirectional slow descending mechanism, the forward and reverse dual-damping slow descending device is adopted, bidirectional slow descending of the key cover can be achieved, it is guaranteed that the key cover can stay at will in the opening and closing process, and fingers of a player cannot be hurt; in addition, a hidden structural design is adopted, so that the installation space is reduced, and the attractiveness is ensured.

Description

Technical Field

[0001] The utility model relates to the field of piano parts, in particular to a two-way slow-drop mechanism for a piano key cover. Background Art

[0002] The key cover of the piano is heavy. In order to reduce the difficulty of opening the key cover and ensure its stable support after opening, the key cover support structure usually adopted is a damping rod support structure. The disadvantages of using a damping rod support structure are:

[0003] (1) Due to the long length of the damping rod, it occupies a large installation space during the specific installation process;

[0004] (2) The damping rod needs to remain in an oblique state after being subsequently expanded and is located on both sides of the keyboard, which results in poor aesthetics;

[0005] (3) During actual use, the damping rod requires a large amount of force to open or close, which affects the user experience to a certain extent. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a two-way slow-down mechanism for a piano key cover. The two-way slow-down mechanism adopts a positive and negative double-damping slow-down device, which can realize the two-way slow-down of the key cover, ensuring that the key cover can stay at will during the opening and closing process, and will not cause damage to the fingers of the player; in addition, the hidden structure design is adopted to reduce the installation space and ensure the aesthetics.

[0007] In order to realize the above-mentioned technical features, the purpose of the utility model is achieved as follows: a two-way slow-down mechanism for a piano key cover comprises a piano frame, and a left arm plate and a right arm plate are respectively arranged on the two sides of the top of the piano frame; key cover connecting plates are respectively rotatably installed on the inner side walls of the left arm plate and the right arm plate through the key cover rotating shaft, and the key covers are fixedly installed on the outer walls of the two key cover connecting plates; a half gear is fixedly installed on the side wall of the key cover connecting plate, and the half gear is meshed with the speed reducer gear on the output shaft of the damping speed reducer for transmission, and the damping speed reducer is fixedly installed on the inner side walls of the corresponding left arm plate and the right arm plate.

[0008] A keyboard is arranged at the middle part of the top of the piano frame and between the left arm board and the right arm board, and a key pressing baffle is arranged on the side of the keyboard.

[0009] The key cover is fixedly connected to the key cover connecting plate via key cover screws.

[0010] Limiting columns for limiting the maximum opening angle of the key cover connecting plate are fixed on the inner side walls of the left arm plate and the right arm plate.

[0011] The inner walls of the left arm plate and the right arm plate are provided with waist-shaped grooves, and a connecting plate is fixedly installed inside the waist-shaped groove by long bolts. The key cover shaft passes through the connecting plate, and a bushing is set between the key cover shaft and the connecting plate, and the key cover connecting plate is set on the outside of the bushing.

[0012] The half gear is fixedly connected to the key cover connecting plate through a plurality of locking bolts.

[0013] The inner side walls of the left arm plate and the right arm plate are provided with damper mounting grooves for mounting the damping descent control device.

[0014] The utility model has the following beneficial effects:

[0015] 1. By adopting the bidirectional slow-down mechanism of the utility model and adopting the positive and negative double-damping slow-down device, the bidirectional slow-down of the key cover can be achieved, ensuring that the key cover can stay at will during the opening and closing process without causing damage to the player's fingers; in addition, the hidden structure design reduces the installation space and ensures aesthetics.

[0016] 2. By adopting the above-mentioned key cover screws, a reliable fixed connection between the key cover and the key cover connecting plate can be achieved.

[0017] 3. The key cover can be limited by the above-mentioned limit column to prevent the opening angle from being too large.

[0018] 4. By adopting the above-mentioned damper installation groove, the fixed installation of the damping device can be achieved, thereby achieving a damping effect during the opening or closing process of the key cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional diagram of the overall structure of the utility model from the first perspective.

[0021] Figure 2 This is a three-dimensional diagram of the overall structure of the utility model from the first perspective.

[0022] Figure 3 It is a three-dimensional diagram of the utility model after removing the left arm plate and a partial enlarged diagram A.

[0023] Figure 4 It is a three-dimensional diagram of the utility model after removing the keyboard and a partial enlarged diagram B.

[0024] Figure 5 It is a three-dimensional diagram of the utility model after removing the keyboard and a partial enlarged diagram of C.

[0025] Figure 6 It is the front view of the utility model.

[0026] Figure 7 For this utility model Figure 6 Medium DD view.

[0027] In the figure: piano frame 1, keyboard 2, left arm plate 3, key pressing baffle 4, key cover connecting plate 5, key cover 6, key cover screw 7, right arm plate 8, descending device gear 9, connecting plate 10, long bolt 11, limit column 12, damping descending device 13, key cover rotating shaft 14, half gear 15, bushing 16, locking bolt 17. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0029] See also Figure 1-7 The invention discloses a piano key cover bidirectional slow-down mechanism, comprising a piano frame 1, wherein the left arm plate 3 and the right arm plate 8 are respectively arranged on the top two sides of the piano frame 1; the key cover connecting plates 5 are respectively rotatably mounted on the inner side walls of the left arm plate 3 and the right arm plate 8 through the key cover rotating shaft 14, and the key cover 6 is fixedly mounted on the outer walls of the two key cover connecting plates 5; a half gear 15 is fixedly mounted on the side wall of the key cover connecting plate 5, and the half gear 15 is meshed with the slow-down gear 9 on the output shaft of the damping slow-down device 13 for transmission, and the damping slow-down device 13 is fixedly mounted on the inner side walls of the corresponding left arm plate 3 and the right arm plate 8. This bidirectional slow-down mechanism adopts a positive and negative double damping slow-down device, which can realize the bidirectional slow-down of the key cover, and ensures that the key cover can stay at will during the opening and closing process, and will not cause damage to the fingers of the performer; in addition, the hidden structure design is adopted to reduce the installation space and ensure the aesthetics. In the specific use process, the opening or closing process of the key cover 6 can be damped and buffered by the two groups of symmetrically arranged damping slow-down devices 13.

[0030] Furthermore, a keyboard 2 is provided at the top middle portion of the piano frame 1 and between the left arm board 3 and the right arm board 8 , and a key pressing baffle 4 is provided on the side of the keyboard 2 .

[0031] Furthermore, the key cover 6 is fixedly connected to the key cover connecting plate 5 by means of key cover screws 7. By using the key cover screws 7, a reliable fixed connection between the key cover 6 and the key cover connecting plate 5 can be achieved.

[0032] Furthermore, a limiting column 12 for limiting the maximum opening angle of the key cover connecting plate 5 is fixed on the inner side wall of the left arm plate 3 and the right arm plate 8. The limiting column 12 can limit the key cover 6 to prevent the opening angle from being too large.

[0033] Furthermore, waist-shaped grooves are provided on the inner side walls of the left arm plate 3 and the right arm plate 8, and a connecting plate 10 is fixedly installed inside the waist-shaped grooves by long bolts 11, and a key cover rotating shaft 14 passes through the connecting plate 10, and a bushing 16 is sleeved between the key cover rotating shaft 14 and the connecting plate 10, and the key cover connecting plate 5 is sleeved outside the bushing 16. Through the above-mentioned installation structure, the key cover rotating shaft 14 can be reliably connected, and at the same time, it is ensured that the key cover connecting plate 5 can rotate around the key cover rotating shaft 14.

[0034] Furthermore, the half gear 15 is fixedly connected to the key cover connecting plate 5 by a plurality of locking bolts 17. The half gear 15 can be reliably connected to the key cover connecting plate 5 by the locking bolts 17, thereby ensuring that the half gear 15 is reliably engaged with the descending device gear 9 of the damping descending device 13, thereby achieving a damping effect during the opening or closing process of the key cover 6.

[0035] Furthermore, the inner side walls of the left arm plate 3 and the right arm plate 8 are provided with damper mounting grooves for mounting the damper descent control device 13. By adopting the damper mounting grooves, the damper descent control device 13 can be fixedly mounted, thereby achieving a damping effect during the opening or closing process of the key cover 6.

[0036] The specific working process and principle of this utility model:

[0037] During operation, when opening or closing the key cover 6, the key cover 6 will synchronously drive the key cover connecting plate 5 to rotate, and the half gear 15 on the key cover connecting plate 5 will engage with the retarder gear 9 at the same time, and the main shaft of the damping retarder 13 will be driven by the retarder gear 9, and then the damping retarder 13 will play a buffering and damping effect, thereby ensuring that the key cover can stay at will during the opening or closing process, and will not cause damage to the player's fingers.

Claims

1. A two-way slow-down mechanism for piano key covers, characterized in that: The piano frame (1) comprises a piano stand (1), wherein a left arm plate (3) and a right arm plate (8) are respectively arranged on both sides of the top of the piano stand (1); a key cover connecting plate (5) is rotatably mounted on the inner side walls of the left arm plate (3) and the right arm plate (8) via a key cover rotating shaft (14); a key cover (6) is fixedly mounted on the outer walls of the two key cover connecting plates (5); a half gear (15) is fixedly mounted on the side wall of the key cover connecting plate (5); the half gear (15) is meshed with a descent control gear (9) on the output shaft of a damping descent control device (13) for transmission; and the damping descent control device (13) is fixedly mounted on the inner side walls of the corresponding left arm plate (3) and the right arm plate (8).

2. The piano key cover bidirectional slow-drop mechanism according to claim 1, characterized in that: A keyboard (2) is arranged at the middle part of the top of the piano frame (1) and between the left armboard (3) and the right armboard (8), and a key pressing baffle (4) is arranged on the side of the keyboard (2).

3. The piano key cover bidirectional slow-drop mechanism according to claim 1, characterized in that: The key cover (6) is fixedly connected to the key cover connecting plate (5) via a key cover screw (7).

4. The piano key cover bidirectional slow-drop mechanism according to claim 1, characterized in that: Limiting columns (12) for limiting the maximum opening angle of the key cover connecting plate (5) are fixed on the inner side walls of the left arm plate (3) and the right arm plate (8).

5. The piano key cover bidirectional slow-drop mechanism according to claim 1, characterized in that: The inner side walls of the left arm plate (3) and the right arm plate (8) are provided with waist-shaped grooves, a connecting plate (10) is fixedly installed inside the waist-shaped grooves by means of long bolts (11), a key cover rotating shaft (14) passes through the connecting plate (10), a bushing (16) is sleeved between the key cover rotating shaft (14) and the connecting plate (10), and the key cover connecting plate (5) is sleeved outside the bushing (16).

6. The piano key cover bidirectional slow-drop mechanism according to claim 5, characterized in that: The half gear (15) is fixedly connected to the key cover connecting plate (5) via a plurality of locking bolts (17).

7. The piano key cover bidirectional slow-drop mechanism according to claim 1, characterized in that: Damper mounting grooves for mounting a damping descent control device (13) are provided on the inner side walls of the left arm plate (3) and the right arm plate (8).

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