Key and linkage device connecting assembly convenient for fine position adjustment
By adding linkage end adjustment block and linkage nail design in the key and linkage nail connection assembly, the problem of fixed position and increased gap in traditional components is solved, and the precise adjustment of linkage nails and the high-precision adjustment of the component is realized, reducing maintenance costs and improving service life.
Patent Information
- Application Number
- CN202421500323.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The connecting components of the traditional keyboard and linker have fixed joint nails and are prone to deformation, resulting in abnormal force transmission, affecting the transmission efficiency and sound quality. The increase in the gap between the central limit pin and the hole wall leads to a worse feel and an increase in noise, which is high maintenance costs.
A key and linker connection assembly for easy adjustment of the position is designed. By adding a linking end adjustment block and a linking staple are installed on the linking end adjustment block, the linking end installation screws and waist-shaped through holes are used to achieve precise adjustment of the linking staple, reducing the gap between the pressing end, the middle and the linking end, and improving adjustment accuracy and wear resistance.
The relative position and angle between the linkage nail and the linkage nail holder is realized, which reduces maintenance costs, improves transmission efficiency and piano sound quality, extends service life, and reduces noise and shaking.
Smart Images
Figure CN222965832U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a component related to keys, in particular to a connection component between a key and a coupler which is convenient for precisely adjusting the position. Background Art
[0002] In a narrow sense, a piano generally refers to a grand piano, and in a broad sense, it refers to a keyboard instrument; in a narrow sense, a key generally refers to a piano keyboard, and in a broad sense, it refers to the keyboard of a keyboard instrument. The key of the utility model is the keyboard of a keyboard instrument in a broad sense, and of course, it is more suitable as the key of a grand piano. To achieve the function of converting the action of playing the piano into piano sounds, the key generally needs to cooperate with a coupler and other related components, and the combination of the key and the coupler forms a connection component between the key and the coupler.
[0003] Such as Figure 1 And Figure 2As shown, the basic structure of a single traditional piano key and linkage connecting assembly includes a traditional key 5 for pressing by hand, a key base 8 for installing the traditional key 5 and a linkage 1 for cooperating with the traditional key 5. The traditional key 5 and the key base 8 are both in the shape of long strips. The horizontal traditional key 5 is located above the horizontal key base 8. The middle section of the key base 8 is provided with an upwardly protruding boss 10. The upper part of the boss 10 is provided with an upwardly protruding convex strip 11. The length direction of the convex strip 11 is perpendicular to the length direction of the key base 8. The radial cross-section of the convex strip 11 is an inverted "V" shape and its top corner is in contact with the lower middle part of the traditional key 5. In this way, the pressing end of the traditional key 5 (one of the two ends of the traditional key 5) can move up and down a small distance in the direction of rotation around the convex strip 11. When the pressing end of the traditional button 5 is pressed by hand, the linkage end of the traditional button 5 (the other end of the traditional button 2) will move upward. A traditional staple mounting hole 4 is provided on the traditional button 5 near its linkage end. The traditional linkage staple 3 is installed in the traditional staple mounting hole 4. A staple seat 2 is provided at the lower part of the linkage 1. A slot is provided below the staple seat 2 and the upper end of the traditional linkage staple 3 is placed in the slot. The linkage end of the traditional button 5 moves upward to drive the traditional linkage staple 3 to move upward, and the linkage 1 is lifted up by the staple seat 2. The linkage 1 drives a small hammer (not shown in the figure) to hit the strings (not shown in the figure) to produce piano sounds. During this process, the upper end of the traditional linkage staple 3 moves adaptively in the slot of the staple seat 2 and will not leave the slot. A vertical traditional pressing end waist-shaped hole 12 (also called a flat hole) is provided on the traditional key 5 near its pressing end. The upper end of the traditional pressing end waist-shaped hole 12 does not penetrate the top of the traditional key 5. A vertical traditional middle waist-shaped hole 6 is provided on the upper middle section of the traditional key 5, and a vertical traditional middle limiting circular hole 7 is provided on the lower middle section. A vertical pressing end limiting pin 13 (generally a flat pin) is provided on the key base 8 at a position below the traditional pressing end waist-shaped hole 12. The upper and middle sections of the pressing end limiting pin 13 are located in the traditional pressing end waist-shaped hole 12. A vertical middle limiting pin 9 (a round pin) is provided on the key base 8 at a position below the traditional middle limiting circular hole 7. The lower end of the positioning pin 9 is located on the convex strip 11, and the upper and middle sections of the middle limiting pin 9 are located in the traditional middle limiting circular hole 7 and the traditional middle waist-shaped hole 6. The middle limiting pin 9 cooperates with the traditional middle limiting circular hole 7 to realize the limiting rotation function of the traditional key 5. The middle limiting pin 9 cooperates with the traditional middle waist-shaped hole 6, and the pressing end limiting pin 13 cooperates with the traditional pressing end waist-shaped hole 12 to jointly realize the pressing end limiting vertical movement function of the traditional key 5. There are many closely related matching factors such as shaking, damping, noise, and friction life between the middle limiting pin 9 and the hole walls of the traditional middle limiting circular hole 7 and the middle waist-shaped hole 6, and between the pressing end limiting pin 13 and the hole walls of the traditional pressing end waist-shaped hole 12.
[0004] like Figure 1 and Figure 2As shown, the above-mentioned traditional piano key and linkage connection assembly has the following structural defects and effect defects: the traditional linkage staple 3 is fixedly installed on the traditional key 5, and the position is fixed and cannot be adjusted. After long-term use, the relative position and angle between the traditional linkage staple 3 and the staple seat 2 of the linkage 1 will change, and the traditional linkage staple 3 and the wooden traditional key 5 are more likely to deform, resulting in the above-mentioned problems, thereby causing abnormal power transmission of the traditional key 5, affecting the transmission efficiency and the feel of playing the piano, reducing the quality of the piano sound, and even causing the linkage 1 to fail to work normally in severe cases. However, because the position of the traditional linkage staple 3 is fixed and cannot be adjusted, it is often necessary to replace the traditional linkage staple 3 or the entire traditional key 5 (when the traditional staple mounting hole 4 is deformed and a new traditional linkage staple 3 cannot be stably installed), which will increase maintenance costs and reduce maintenance efficiency.
[0005] In addition, the gap size design is used between the middle limit pin 9 of the above-mentioned traditional piano key and linkage connecting assembly and the hole wall of the traditional middle limit circular hole 7 to meet the movement needs of the traditional key 5 and reduce shaking and increase damping. Therefore, the gap size requires high precision, which will increase the processing cost. The gap size design is used between the middle limit pin 9 and the hole wall of the traditional middle waist-shaped hole 6, and between the pressing end limit pin 13 and the hole wall of the traditional pressing end waist-shaped hole 12, and wool felt is filled to meet the movement needs of the traditional key 5 and reduce shaking, increase damping and reduce noise. After a period of time, the hole walls of the traditional middle limiting circular hole 7, the traditional middle waist-shaped hole 6 and the traditional pressing end waist-shaped hole 12 will become thinner, the size of the hole will increase, the gap between each hole and the corresponding limiting pin will increase, and it will not have recovery properties, resulting in the loosening of the traditional key 5, the worsening of the hand feel when playing the piano, and the increase of noise. Moreover, since the traditional key 5 is a wooden key, its friction life is short (that is, the number of frictions without deformation is small), and the above problems are more serious; at the same time, the wool felt will also show obvious shape changes in long-term use and the changes in temperature and humidity brought about by seasonal changes, which will also lead to the above problems. During subsequent maintenance, since the corresponding aperture of the traditional key 5 has been enlarged, it is no longer possible to adjust parameters such as damping and noise through the gap between the middle limit pin 9 and the hole walls of the traditional middle limit circular hole 7 and the traditional middle waist-shaped hole 6, and between the pressing end limit pin 13 and the hole walls of the traditional pressing end waist-shaped hole 12. It is difficult to achieve precise adjustment simply by adding wool felt, so it is often necessary to directly replace the entire traditional key 5 to solve these problems. The maintenance cost is high, and it is difficult to find suitable keys to replace some pianos with small market stocks. Utility Model Content
[0006] The purpose of the utility model is to solve the above-mentioned problem and provide a piano key and linkage connecting assembly capable of accurately adjusting the position of the linkage nail, that is, facilitating fine adjustment of the position.
[0007] The present utility model realizes the above object through the following technical solutions:
[0008] A key and linkage connection assembly facilitating fine position adjustment, comprising a strip-shaped key, a strip-shaped key seat and a linkage. The horizontal key is located above the horizontal key seat. A linkage stud is installed at a position of the key close to its linkage end. A stud seat is provided at the lower part of the linkage. A slot is provided under the stud seat and the upper end of the linkage stud is placed in the slot. The key and linkage connection assembly facilitating fine position adjustment further comprises a linkage end adjustment block and a linkage end mounting screw. Two vertical linkage end screw holes distributed in the length direction of the key are provided at a position of the key close to its linkage end. Two vertically penetrating linkage waist-shaped through holes are provided on the linkage end adjustment block. A vertical stud mounting hole is provided at a position between the two linkage waist-shaped through holes on the linkage end adjustment block. The linkage stud is installed in the stud mounting hole. The screws of the two linkage end mounting screws respectively pass through the two linkage waist-shaped through holes from top to bottom and are connected to the two linkage end screw holes.
[0009] Preferably, in order to facilitate the precise adjustment of various parameters between the button and the key seat, a convex platform protruding upward is provided on the middle section of the key seat, and a convex strip protruding upward is provided on the convex platform. The length direction of the convex strip is perpendicular to the length direction of the key seat. A vertical waist-shaped hole at the pressing end is provided at a position near the pressing end of the button. A vertical pressing-end limiting pin is provided on the key seat at a position below the waist-shaped hole at the pressing end. The middle upper section of the pressing-end limiting pin is located in the waist-shaped hole at the pressing end. A laterally penetrating pressing-end adjusting screw hole is provided on the hole wall of the waist-shaped hole at the pressing end. A pressing-end adjusting screw is placed in the pressing-end adjusting screw hole. A vertically penetrating middle waist-shaped hole is provided in the middle section of the button. A vertical middle limiting pin is provided on the middle section of the key seat. The lower end of the middle limiting pin is located on the convex strip. A middle lower adjusting block is located between the lower part of the middle section of the button and the upper part of the middle section of the key seat. The screw rod of the middle lower mounting screw passes through the lower mounting through hole on the middle lower adjusting block from bottom to top and then is connected to the lower mounting screw hole on the lower surface of the middle section of the button. A vertically penetrating adjusting block circular through hole is provided on the middle lower adjusting block, and a laterally penetrating middle lower adjusting screw hole is provided on the hole wall of the adjusting block circular through hole. A middle lower adjusting screw is placed in the middle lower adjusting screw hole. A middle upper adjusting block is located above the middle section of the button. The screw rod of the middle upper mounting screw passes through the upper mounting through hole on the middle upper adjusting block from top to bottom and then is connected to the upper mounting screw hole on the upper surface of the middle section of the button. A vertically penetrating adjusting block waist-shaped through hole is provided on the middle upper adjusting block, and a laterally penetrating middle upper adjusting screw hole is provided on the hole wall of the adjusting block waist-shaped through hole. A middle upper adjusting screw is placed in the middle upper adjusting screw hole. The middle limiting pin passes through the adjusting block circular through hole, the middle waist-shaped hole, and the adjusting block waist-shaped through hole from bottom to top in sequence.
[0010] Preferably, for the convenience of installation and adjustment operations, there are two pressing-end adjusting screw holes which are respectively located on the opposite side hole walls in the width direction of the waist-shaped hole at the pressing end, and two pressing-end adjusting screws are respectively placed in the two pressing-end adjusting screw holes; there are four middle lower adjusting screw holes which are evenly distributed on the outer peripheral hole wall of the adjusting block circular through hole, and four middle lower adjusting screws are respectively placed in the four middle lower adjusting screw holes; there are two middle upper adjusting screw holes which are respectively located on the opposite side hole walls in the width direction of the adjusting block waist-shaped through hole, and two middle upper adjusting screws are respectively placed in the two middle upper adjusting screw holes.
[0011] Preferably, in order to be assembled in cooperation with the middle kidney-shaped hole on the button and facilitate the installation of two middle lower adjusting screws, the middle lower adjusting block is a strip-shaped block and the length direction thereof is the same as the length direction of the button. The two lower mounting through holes are respectively located outside the opposite sides of the circular through hole of the adjusting block and are distributed in the length direction of the middle lower adjusting block. The two lower mounting screw holes are respectively located outside the opposite sides in the length direction of the middle kidney-shaped hole. The screws of the two middle lower mounting screws respectively pass through the two lower mounting through holes from bottom to top and are connected to the two lower mounting screw holes. Transverse through screw holes are respectively provided on the side hole walls of the two lower mounting through holes far away from the circular through hole of the adjusting block.
[0012] Preferably, in order to reduce the vertical gap between the button and the key seat, a sunken groove recessed upward is provided at the position corresponding to the middle lower adjusting block on the lower surface of the middle section of the button, and the middle lower adjusting block is placed in the sunken groove.
[0013] Preferably, in order to be assembled in cooperation with the middle kidney-shaped hole on the button, the middle upper adjusting block is a strip-shaped block and the length direction thereof is the same as the length direction of the button. The two upper mounting through holes are respectively located outside the opposite sides in the length direction of the kidney-shaped through hole of the adjusting block and are distributed in the length direction of the middle upper adjusting block. The two upper mounting screw holes are respectively located outside the opposite sides in the length direction of the middle kidney-shaped hole. The screws of the two middle upper mounting screws respectively pass through the two upper mounting through holes from top to bottom and are connected to the two upper mounting screw holes; the two upper mounting screw holes and the two lower mounting screw holes are vertically corresponding respectively, and the vertically corresponding upper mounting screw hole and lower mounting screw hole can be independent of each other or connected into one body.
[0014] Preferably, in order to facilitate the adjustment of the relative positions between the middle lower adjusting block and the button and between the middle upper adjusting block and the button to further improve the adjustment accuracy of relevant parameters, both the lower mounting through hole and the upper mounting through hole are kidney-shaped through holes and the length direction thereof is the same as the length direction of the button.
[0015] Preferably, in order to improve the wear resistance of the button, the middle lower adjusting block and the middle upper adjusting block to improve the friction life and service life, the button is a resin carbon fiber composite material button, the middle lower adjusting block and the middle upper adjusting block are both resin carbon fiber composite material blocks, and the pressing end adjusting screw, the middle lower adjusting screw and the middle upper adjusting screw are all PTFE screws without nuts and a screwdriver slot is provided on the outer end face thereof.
[0016] Preferably, in order to facilitate the reliable installation of the linkage pin without affecting its normal operation and to facilitate the adjustment of its position, a vertical pin clearance hole is provided on the button between the two linkage end screw holes, and the lower end of the linkage pin passes through the pin installation hole and is located in the pin clearance hole.
[0017] Preferably, in order to facilitate the adjustment of the position of the linkage pin and improve the wear resistance of the linkage end adjustment block to increase the friction life and service life, the linkage end adjustment block is a strip block and its length direction is the same as the length direction of the button, the length direction of the two linkage waist-shaped through holes is the same as the length direction of the linkage end adjustment block, and the linkage end adjustment block is a resin carbon fiber composite material block.
[0018] The beneficial effects of the utility model are:
[0019] The utility model adds a linkage end adjustment block and installs the linkage pin on the linkage end adjustment block, and installs the linkage end adjustment block on the key through two linkage end mounting screws and two linkage waist-shaped through holes. The position of the linkage pin relative to the key can be accurately adjusted as needed, thereby accurately adjusting the relative position and angle between the linkage pin and the pin seat of the linkage device (there is a certain angle between the linkage pin and the pin seat). It is particularly suitable for later maintenance after a period of use. It only needs to adjust the position between the linkage end adjustment block and the key to meet the normal transmission working needs of the linkage pin and the linkage, ensuring that the transmission efficiency, piano sound quality and piano playing feel are not affected. Generally, there is no need to replace the linkage pin and the linkage end adjustment block, let alone the entire key, thereby reducing maintenance costs and improving maintenance efficiency.
[0020] In addition, the utility model adds a pressing end adjusting screw, a middle lower adjusting screw, a middle lower adjusting block, a middle upper adjusting screw and a middle upper adjusting block. When maintenance is needed after a period of use, the gap between the pressing end limit pin and the pressing end adjusting screw is reduced by adjusting the pressing end adjusting screw, the gap between the middle limit pin and the middle lower adjusting screw is reduced by adjusting the middle upper adjusting screw, and the gap between the middle limit pin and the middle upper adjusting screw is reduced by adjusting the middle lower adjusting screw. Finally, the purpose of reducing the gap between each limit pin and the corresponding adjusting screw is achieved through each adjusting screw, thereby realizing the fine adjustment function of each parameter of the piano key, reducing the shaking between the key and the key seat and the noise, increasing the damping and improving the feel of playing the piano, and realizing high-precision adjustment function without replacing the key, meeting user needs, greatly reducing maintenance costs compared to replacing the entire key, significantly increasing service life, and reducing maintenance difficulty. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1It is a perspective three-dimensional structure diagram of the connection component between a traditional key and a coupler before assembly;
[0022] Figure 2 It is a three-dimensional structure diagram of the connection component between a traditional key and a coupler after assembly;
[0023] Figure 3 It is a perspective three-dimensional structure diagram of the connection component between the key and the coupler for facilitating precise position adjustment according to the present invention before assembly;
[0024] Figure 4 It is a three-dimensional structure diagram of the connection component between the key and the coupler for facilitating precise position adjustment according to the present invention after assembly;
[0025] Figure 5 It is Figure 3 an enlarged view of "A" in Detailed implementation mode
[0026] The present invention will be further described below with reference to the accompanying drawings:
[0027] As Figures 3 - 5 shown, the connection component between the key and the coupler for facilitating precise position adjustment according to the present invention includes a long strip-shaped key 25, a long strip-shaped key seat 8, a coupler 1, a linkage end adjustment block 18 and a linkage end mounting screw 15. The horizontal key 25 is located above the horizontal key seat 8. A linkage stud 14 is installed at a position on the key 25 near its linkage end. A stud seat 2 is provided at the lower part of the coupler 1. There is a slot (not separately marked in the figure) under the stud seat 2 and the upper end of the linkage stud 14 is placed in this slot. At a position on the key 25 near its linkage end (one of the two ends of the key 25), two vertical linkage end screw holes 20 distributed in the length direction of the key 25 are provided. Two vertically penetrating linkage waist-shaped through holes 17 (with countersunk holes on the upper part) are provided on the linkage end adjustment block 18. A vertical stud mounting hole 16 is provided at a position between the two linkage waist-shaped through holes 17 on the linkage end adjustment block 18. The linkage stud 14 is installed in the stud mounting hole 16. The screw rods of the two linkage end mounting screws 15 respectively pass through the two linkage waist-shaped through holes 17 from top to bottom and are connected to the two linkage end screw holes 20. Note: The above connection component between the key and the coupler is one, and an actual musical instrument such as a piano has multiple connection components between the keys and the couplers.
[0028] As Figures 3 - 5 shown, the present invention also discloses the following multiple more optimized specific structures:
[0029] In order to facilitate the precise adjustment of various parameters between the button 25 and the key base 8, a convex platform 10 protruding upward is provided on the middle section of the key base 8. On the convex platform 10, a convex strip 11 protruding upward is provided. The length direction of the convex strip 11 is perpendicular to the length direction of the key base 8. At a position on the button 25 near its pressing end (the other end of the two ends of the button 25), a vertical pressing-end kidney-shaped hole 29 is provided. At a position on the key base 8 below the pressing-end kidney-shaped hole 29, a vertical pressing-end limit pin 13 is provided. The middle upper section of the pressing-end limit pin 13 is located within the pressing-end kidney-shaped hole 29. The hole wall of the pressing-end kidney-shaped hole 29 is provided with a horizontally penetrating pressing-end adjusting screw hole 30. A pressing-end adjusting screw 28 is placed within the pressing-end adjusting screw hole 30. A vertical middle kidney-shaped hole 24 is provided in the middle section of the button 25. A vertical middle limit pin 9 is provided on the middle section of the key base 8. The lower end of the middle limit pin 9 is located on the convex strip 11. A middle lower adjusting block 27 is located between the lower part of the middle section of the button 25 and the upper part of the middle section of the key base 8. The screw rod of the middle lower mounting screw 41 passes through the lower mounting through hole 38 (the lower part is a countersunk hole) on the middle lower adjusting block 27 from bottom to top and then is connected to the lower mounting screw hole 35 on the lower surface of the middle section of the button 25. The middle lower adjusting block 27 is provided with a vertically penetrating adjusting block circular through hole 37, and a horizontally penetrating middle lower adjusting screw hole 40 is provided on the hole wall of the adjusting block circular through hole 37. A middle lower adjusting screw 26 is placed within the middle lower adjusting screw hole 40. A middle upper adjusting block 23 is located above the middle section of the button 25. The screw rod of the middle upper mounting screw 21 passes through the upper mounting through hole 33 (the upper part is a countersunk hole) on the middle upper adjusting block 23 from top to bottom and then is connected to the upper mounting screw hole 34 on the upper surface of the middle section of the button 25. The middle upper adjusting block 23 is provided with a vertically penetrating adjusting block kidney-shaped through hole 31, and a horizontally penetrating middle upper adjusting screw hole 32 is provided on the hole wall of the adjusting block kidney-shaped through hole 31. A middle upper adjusting screw 22 is placed within the middle upper adjusting screw hole 32. The middle limit pin 9 passes through the adjusting block circular through hole 37, the middle kidney-shaped hole 24, and the adjusting block kidney-shaped through hole 31 from bottom to top in sequence.
[0030] In order to facilitate the installation and adjustment operations, there are two pressing-end adjusting screw holes 30, which are respectively located on the opposite side hole walls in the width direction of the pressing-end kidney-shaped hole 29. Two pressing-end adjusting screws 28 are respectively placed within the two pressing-end adjusting screw holes 30; there are four middle lower adjusting screw holes 40, which are evenly distributed on the outer peripheral hole wall of the adjusting block circular through hole 37. Four middle lower adjusting screws 26 are respectively placed within the four middle lower adjusting screw holes 40; there are two middle upper adjusting screw holes 32, which are respectively located on the opposite side hole walls in the width direction of the adjusting block kidney-shaped through hole 31. Two middle upper adjusting screws 22 are respectively placed within the two middle upper adjusting screw holes 32.
[0031] In order to be assembled in a matching manner with the middle kidney-shaped hole 24 on the button 25 and facilitate the installation of two middle lower adjusting screws 26 therein, the middle lower adjusting block 27 is a strip-shaped block and its length direction is the same as the length direction of the button 25. The two lower mounting through holes 38 are respectively located outside the opposite sides of the adjusting block circular through hole 37 and are distributed in the length direction of the middle lower adjusting block 27. The two lower mounting screw holes 35 are respectively located outside the opposite sides in the length direction of the middle kidney-shaped hole 24. The screws of the two middle lower mounting screws 41 respectively pass through the two lower mounting through holes 38 from bottom to top and are connected to the two lower mounting screw holes 35. Transversely penetrating screw through holes 39 are respectively provided on the side hole walls of the two lower mounting through holes 38 far away from the adjusting block circular through hole 37.
[0032] In order to reduce the vertical gap between the button 25 and the key seat 8, a sunken groove 36 recessed upward is provided at the position corresponding to the middle lower adjusting block 27 on the lower surface of the middle section of the button 25, and the middle lower adjusting block 27 is placed in the sunken groove 36.
[0033] In order to be assembled in a matching manner with the middle kidney-shaped hole 24 on the button 25, the middle upper adjusting block 23 is a strip-shaped block and its length direction is the same as the length direction of the button 25. The two upper mounting through holes 33 are respectively located outside the opposite sides in the length direction of the adjusting block kidney-shaped through hole 31 and are distributed in the length direction of the middle upper adjusting block 23. The two upper mounting screw holes 34 are respectively located outside the opposite sides in the length direction of the middle kidney-shaped hole 24. The screws of the two middle upper mounting screws 21 respectively pass through the two upper mounting through holes 33 from top to bottom and are connected to the two upper mounting screw holes 34; the two upper mounting screw holes 34 and the two lower mounting screw holes 35 are respectively vertically corresponding, and the vertically corresponding upper mounting screw hole 34 and lower mounting screw hole 35 can be independent of each other or connected as a whole.
[0034] In order to facilitate the adjustment of the relative positions between the middle lower adjusting block 27 and the button 25 and between the middle upper adjusting block 23 and the button 25 to further improve the adjustment accuracy of relevant parameters, both the lower mounting through hole 38 and the upper mounting through hole 33 are kidney-shaped through holes and their length directions are the same as the length direction of the button 25.
[0035] In order to improve the wear resistance of the button 25, the middle lower adjusting block 27 and the middle upper adjusting block 23 to improve the friction life and service life, the button 25 is a resin carbon fiber composite material button, the middle lower adjusting block 27 and the middle upper adjusting block 23 are both resin carbon fiber composite material blocks, the pressing end adjusting screw 28, the middle lower adjusting screw 26 and the middle upper adjusting screw 22 are all PTFE screws without nuts and their outer end faces are provided with screwdriver slots. The above resin carbon fiber composite material is preferably composed of 85% by mass of ABS resin and 15% by mass of carbon fiber.
[0036] To facilitate the reliable installation of the linkage stud 14 without affecting its normal operation and to facilitate the adjustment of its position, a vertical stud relief hole 19 is provided at a position on the key 25 between the two linkage end screw holes 20. The stud relief hole 19 is preferably an oblong hole, and the lower end of the linkage stud 14 passes through the stud mounting hole 16 and is located within the stud relief hole 19.
[0037] To facilitate the adjustment of the position of the linkage stud 14 and improve the wear resistance of the linkage end adjusting block 18 to increase the friction life and service life, the linkage end adjusting block 18 is a strip-shaped block and its length direction is the same as the length direction of the key 25. The length directions of the two linkage oblong through holes 17 are the same as the length direction of the linkage end adjusting block 18. The linkage end adjusting block 18 is a resin carbon fiber composite material block. The above resin carbon fiber composite material is preferably composed of 85% by mass of ABS resin and 15% by mass of carbon fiber. In addition, the linkage stud 14 is preferably a brass stud, and it can be snap-connected or thread-connected to the stud mounting hole 16, depending on specific needs.
[0038] As Figures 3 - 5 shown, when playing the piano, press the pressing end of the key 25 with the hand, and the linkage end of the key 25 will move upward, driving the linkage end adjusting block 18 and the linkage stud 14 to move upward. The upper end of the linkage stud 14 jacks up the linkage 1 through the stud seat 2, and the linkage 1 drives the hammer (not shown in the figure) to strike the strings (not shown in the figure) to produce the piano sound. When maintenance is required after using for a period of time, first loosen the two linkage end mounting screws 15, and then move the linkage end adjusting block 18 to drive the linkage stud 14 to move to a suitable position. During this process, the linkage end mounting screws 15 are fixed relative to the key 25 and move relative to each other within the linkage oblong through holes 17. The lower end of the linkage stud 14 moves within the stud relief hole 19. After moving to the position, tighten the two linkage end mounting screws 15 to fixedly connect the linkage end adjusting block 18 and the linkage stud 14 to the key 25, then the precise linkage adjustment between the key 25 and the linkage 1 is completed. The linkage stud 14 and the stud seat 2 have a suitable relative position and angle again, meeting the normal transmission working requirements between the linkage stud 14 and the linkage 1, ensuring that the transmission efficiency, piano sound quality, and piano-playing feel are not affected. Generally, it is not necessary to replace the linkage stud 14 and the linkage end adjusting block 18, and even less necessary to replace the entire key 25, reducing the maintenance cost and improving the maintenance efficiency.
[0039] The adjustment process between the key 25 and the key base 8 is as follows: the gap between the pressing end limit pin 13 and the pressing end adjustment screw 28 is reduced by adjusting the pressing end adjustment screw 28, the gap between the middle limit pin 9 and the middle lower adjustment screw 26 is reduced by adjusting the middle upper adjustment screw 22, and the gap between the middle limit pin 9 and the middle upper adjustment screw 22 is reduced by adjusting the middle upper adjustment screw 22. Finally, the purpose of reducing the gap between each limit pin and the corresponding adjustment screw is achieved through each adjustment screw, thereby realizing the fine adjustment function of each parameter of the key, reducing the shaking between the key 25 and the key base 8 and reducing the noise, increasing the damping and improving the feel of playing the piano, and realizing high-precision adjustment function without replacing the key 25 to meet user needs. Compared with replacing the entire key 25, the maintenance cost is greatly reduced, the service life is significantly increased, and the maintenance difficulty is reduced.
[0040] Note: The linkage 1, the staple seat 2, the key seat 8, the boss 10, the middle limit pin 9, the convex strip 11, and the pressing end limit pin 13 in the above-mentioned specific implementation method respectively correspond to the linkage 1, the staple seat 2, the key seat 8, the boss 10, the middle limit pin 9, the convex strip 11, and the pressing end limit pin 13 in the background technology content and have the same structure, so the same marking numbers and component names are used; the linkage staple 14, the staple mounting hole 16, the button 25, the circular through hole 37 of the adjustment block, the waist of the pressing end The middle waist-shaped hole 24 and the waist-shaped through hole 31 of the adjustment block in the above-mentioned specific implementation manner correspond to the traditional middle waist-shaped hole 6 in the background technology content after being connected with each other, but the structure has undergone important changes or adaptive changes, so different marking numbers and component names are adopted.
[0041] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.
Claims
1. A piano key and linkage connecting assembly for fine adjustment of position, comprising a long strip key, a long strip key seat and a linkage, wherein the horizontal key is located above the horizontal key seat, a linkage pin is installed on the key near its linkage end, a pin seat is provided at the bottom of the linkage, a slot is provided below the pin seat and the upper end of the linkage pin is placed in the slot, characterized in that: The piano key and linkage connection assembly for fine adjustment of the position also includes a linkage end adjustment block and a linkage end mounting screw. The key is provided with two vertical linkage end screw holes distributed in the length direction of the key near its linkage end. The linkage end adjustment block is provided with two vertically penetrating linkage waist-shaped through holes. The linkage end adjustment block is provided with a vertical staple mounting hole at a position located between the two linkage waist-shaped through holes. The linkage staple is installed in the staple mounting hole. The screw rods of the two linkage end mounting screws respectively pass through the two linkage waist-shaped through holes from top to bottom and are connected to the two linkage end screw holes.
2. The piano key and linkage connection assembly for facilitating fine adjustment of position according to claim 1, characterized in that: The middle section of the key seat is provided with an upwardly protruding boss, and the boss is provided with an upwardly protruding convex strip, the length direction of the convex strip is perpendicular to the length direction of the key seat, and a vertical pressing end waist-shaped hole is provided on the key near its pressing end, and a vertical pressing end limiting pin is provided at a position below the pressing end waist-shaped hole on the key seat, the middle and upper sections of the pressing end limiting pin are located in the pressing end waist-shaped hole, the hole wall of the pressing end waist-shaped hole is provided with a horizontally penetrating pressing end adjusting screw hole, the pressing end adjusting screw is placed in the pressing end adjusting screw hole, the middle section of the key is provided with a vertically penetrating middle waist-shaped hole, and a vertical middle limiting pin is provided on the middle section of the key seat, the lower end of the middle limiting pin is located on the convex strip, the middle lower adjusting block is located between the lower middle section of the key and the upper middle section of the key seat, and the screw rod of the middle lower mounting screw is installed from bottom to top. The cam-shaped screw threaded hole is used to fix the screw thread on the adjusting block, and the cam-shaped screw threaded hole is used to fix the screw thread on the adjusting block.
3. The piano key and linkage connection assembly for facilitating fine adjustment of position according to claim 2, characterized in that: There are two adjusting screw holes at the pressing end, which are respectively located on the hole walls on the opposite sides in the width direction of the waist-shaped hole at the pressing end, and the two adjusting screws at the pressing end are respectively placed in the two adjusting screw holes at the pressing end; there are four lower middle adjusting screw holes, which are respectively evenly distributed on the outer peripheral hole walls of the circular through hole of the adjusting block, and the four lower middle adjusting screws are respectively placed in the four lower middle adjusting screw holes; there are two upper middle adjusting screw holes, which are respectively located on the hole walls on the opposite sides in the width direction of the waist-shaped through hole of the adjusting block, and the two upper middle adjusting screws are respectively placed in the two upper middle adjusting screw holes.
4. The piano key and linkage connection assembly for facilitating fine adjustment of position according to claim 3, characterized in that: The middle lower adjustment block is a strip block and its length direction is the same as the length direction of the button. The two lower mounting through holes are respectively located outside the opposite sides of the circular through hole of the adjustment block and are distributed in the length direction of the middle lower adjustment block. The two lower mounting screw holes are respectively located outside the opposite sides of the length direction of the middle waist-shaped hole. The screw rods of the two middle lower mounting screws pass through the two lower mounting through holes from bottom to top and are connected to the two lower mounting screw holes. The two lower mounting through holes are provided with transversely penetrating screw through holes on the side hole wall away from the circular through hole of the adjustment block.
5. The piano key and linkage connection assembly for facilitating fine adjustment of position according to claim 4, characterized in that: A recessed groove that is recessed upwards is provided at a position below the middle section of the button corresponding to the lower middle adjusting block, and the lower middle adjusting block is placed in the recessed groove.
6. The piano key and linkage connection assembly for facilitating fine adjustment of position according to claim 3, characterized in that: The middle upper adjustment block is a bar block and its length direction is the same as the length direction of the button. The two upper mounting through holes are respectively located outside the waist-shaped through hole of the adjustment block on opposite sides in the length direction and are distributed in the length direction of the middle upper adjustment block. The two upper mounting screw holes are respectively located outside the waist-shaped hole in the middle on opposite sides in the length direction. The screw rods of the two middle upper mounting screws pass through the two upper mounting through holes from top to bottom and are connected with the two upper mounting screw holes.
7. The piano key and linkage connection assembly for facilitating fine adjustment of position according to any one of claims 2 to 6, characterized in that: The lower mounting through hole and the upper mounting through hole are both waist-shaped through holes, and the length direction thereof is the same as the length direction of the key.
8. The piano key and linkage connection assembly for facilitating fine adjustment of position according to any one of claims 2 to 6, characterized in that: The button is a resin carbon fiber composite material button, the middle lower adjustment block and the middle upper adjustment block are both resin carbon fiber composite material blocks, the pressing end adjustment screw, the middle lower adjustment screw and the middle upper adjustment screw are all polytetrafluoroethylene screws without nuts and their outer end faces are provided with tool changing grooves.
9. The piano key and linkage connection assembly for facilitating fine adjustment of position according to any one of claims 1 to 6, characterized in that: A vertical staple hole is provided on the button between the two linkage end screw holes, and the lower end of the linkage staple passes through the staple installation hole and is located in the staple hole.
10. The piano key and linkage connection assembly for facilitating fine adjustment of position according to any one of claims 1 to 6, characterized in that: The linkage end adjustment block is a strip block and its length direction is the same as the length direction of the button. The length direction of the two linkage waist-shaped through holes is the same as the length direction of the linkage end adjustment block. The linkage end adjustment block is a resin carbon fiber composite material block.