A vertical piano string striking machine capable of rapid repetition

Abstract

The invention relates to a vertical piano string striker capable of fast repetition, comprising a linkage rod, a top rod shaft support and a fast reset top rod assembly, the linkage rod is vertically installed with the top rod shaft support in the middle, the top rod shaft support is rotatably connected with the lower end of the fast reset top rod assembly through a rotating shaft, the left end of the linkage rod is rotatably connected with the lower end of the string striker total gear through a linkage shaft support, the upper end right part of the string striker total gear is rotatably installed with a striker cam, the upper end of the fast reset top rod assembly is matched with the lower end right side of the striker cam, the striker cam is installed with a hammer structure, the fast reset top rod assembly comprises a top rod cam, a top rod body and an adjusting screw, and the lower left end of the top rod cam is rotatably connected with the top rod shaft support. The invention can store part of the energy of playing for assisting the linkage reset, and the top rod with two degrees of freedom can also avoid the interference of the striker cam through swinging.

Description

Technical Field

[0001] This invention relates to the field of action mechanism technology, and in particular to an upright piano action mechanism capable of rapid repeating. Background Technology

[0002] Currently, due to structural limitations, upright pianos are inherently weaker than grand pianos in terms of rapid repeating ability. The key factor affecting repeating speed is that the action of a grand piano relies on gravity for reset, which is faster and more thorough than the spring reset of an upright piano. Most notably, the grand piano has a vibrating lever on the upper part of the linkage that enables the action to perform "repeated vibrating". Its presence allows the grand piano to repeat more than 12 times per second, while the upright piano, due to space limitations, cannot install a vibrating lever, which significantly reduces its repeating ability.

[0003] Among the publicly available technologies, there are roughly two ways to improve the repetition performance of an upright piano: 1. Speed ​​up the reset speed of the action; 2. Speed ​​up the reset speed of the linkage.

[0004] However, in actual operation, a "choking" situation often occurs, that is, during the reset process of the linkage, the push rod interferes with the cam of the rotor. At this time, the linkage does not reset, does not have the transmission conditions, and cannot drive the rotor.

[0005] Therefore, improving the repetition performance of an upright piano should not only involve speeding up the reset speed, but also ensuring the coordination between the linkage and the action while speeding up the reset speed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an upright piano action that can quickly repeat the action. It can store part of the energy of the playing to assist the linkage in resetting. At the same time, the push rod with two degrees of freedom can also avoid interference from the rotating cam of the action by swinging, thus realizing quick resetting and preventing the occurrence of "choking", thereby enhancing the repeating ability of the entire action system.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: An upright piano action mechanism capable of rapid repeating is provided, comprising a linkage rod, a push rod bracket, and a quick-reset push rod assembly. The push rod bracket is vertically mounted on the middle of the linkage rod. The upper end of the push rod bracket is rotatably connected to the lower end of the quick-reset push rod assembly via a rotating shaft. The left end of the linkage rod is rotatably connected to the lower end of the action mechanism assembly via a linkage bracket. A rotating action cam is rotatably mounted on the upper right side of the action mechanism assembly. The upper end of the quick-reset push rod assembly is connected to… The lower right side of the impactor cam forms a mating structure, and a hammer structure is installed on the impactor cam. The quick-reset push rod assembly includes a push rod cam, a push rod body, and an adjusting screw. The lower left end of the push rod cam is rotatably connected to the push rod shaft bracket. An adjusting screw that passes through the end of the push rod cam is installed on the upper left end of the push rod cam. The lower end of the push rod body adopts an expansion structure. The expansion structure is connected to the push rod cam through a longitudinal rotating shaft. An opening is provided at the lower end of the expansion structure, and the left inner wall of the opening corresponds to the adjusting screw.

[0008] In this design, the quick reset push rod assembly is divided into two sections: the push rod cam and the push rod body. The two sections are connected by a longitudinal rotating shaft. The push rod body can swing around the longitudinal rotating shaft. An adjusting screw is provided in the push rod cam to adjust the swing range of the push rod body. When a "choking" situation occurs, the push rod body can swing to avoid the interference of the rotor cam, ensuring smooth reset.

[0009] Compared to the traditional push rod design with one degree of freedom, this design adds one degree of freedom to the push rod, allowing the end of the quick-reset push rod assembly to better engage with the rotor cam.

[0010] As a supplement to this technical solution, the expansion structure is equipped with a hook rope extending to the right, and the top rod body is equipped with a hook spring in the middle. One end of the hook spring extends to the right and bends and extends in the direction of the hook rope, and the extended end of the hook spring hooks the hook rope.

[0011] A hook spring is installed in the push rod body, and a hook rope is installed in the push rod cam. The hook spring is hooked in the hook rope to ensure that the push rod body is pressed against the adjusting screw, thus ensuring the accurate positioning of the push rod body.

[0012] As a supplement to this technical solution, an impactor spring is installed on the impactor cam, and the lower end of the impactor spring abuts against the upper right side of the quick reset push rod assembly.

[0013] An impactor spring is installed on the impactor cam, which can move together with the impactor cam and be reset by the elastic auxiliary device. In this design, the push rod brake is eliminated and replaced with a one-to-one limit provided by the impactor spring for the quick reset push rod assembly.

[0014] As a supplement to this technical solution, one end of the impactor spring adopts a rod-shaped structure and is fitted to the upper end surface of the impactor cam, the other end of the impactor spring adopts a ring structure and abuts against the upper right side of the quick reset push rod assembly, and the middle part of the impactor spring adopts a torsion spring structure.

[0015] By setting one end of the impactor spring as a rod-shaped structure, the impactor spring is easy to position during installation, and the bonding strength between the two is also improved. By setting the other end of the impactor spring as a ring structure, it is possible to prevent the ring structure from damaging the quick reset push rod assembly during the process of abutting against the upper end of the quick reset push rod assembly, thus ensuring the service life of the structure.

[0016] As a supplement to this technical solution, pads are provided on both the left and right side walls of the opening. By providing the pad structure, the opening and the contact part between the adjusting screw and the push rod cam are protected.

[0017] As a supplement to this technical solution, a spring is installed on the right end of the linkage rod, and the lower right end of the push rod cam always presses against the upper end of the spring, thereby resetting the push rod cam by installing the spring.

[0018] As a supplement to this technical solution, a brake block extending to the right is installed on the right side of the rotor cam, and a support block corresponding to the brake block is provided at the right end of the linkage rod. The rotor cam is reset by setting the brake block and the support block.

[0019] As a supplement to this technical solution, a hammer action bracket is installed on the right side of the main hammer action frame, and a back block is provided on the upper right side of the hammer structure. The front end of the back block is connected and fixed to the upper right end of the hammer action bracket, and the lower end of the back block is connected to the lower side of the upper right corner of the hammer action bracket.

[0020] In this technical solution, a reset lever for the main action is provided to give the main action a reset force, and an elastic rod structure is used to ensure that the main action quickly resets when the playing force is lost.

[0021] As a supplement to this technical solution, a damper shaft bracket is installed on the upper left side of the main action frame. The left end of the damper shaft bracket extends out of the main action frame, and the damper shaft bracket is rotatably connected to the middle of the damper via a rotating shaft.

[0022] Beneficial Effects: This invention relates to an upright piano action mechanism capable of rapid repetition. It divides the rapid reset push rod assembly into two sections: a push rod cam and a push rod body, connected by a longitudinal pivot. The push rod body can swing around this pivot. An adjusting screw is located in the push rod cam to adjust the swing range of the push rod body. In the event of a "choke," the push rod body can swing to avoid interference from the action cam, ensuring smooth reset. This invention can store some of the playing energy to assist in the linkage's reset. Simultaneously, the push rod, possessing two degrees of freedom, can also swing to avoid interference from the action cam, achieving rapid reset and preventing "choke" situations, thereby enhancing the repetition capability of the entire action system. Attached Figure Description

[0023] Figure 1 This is a structural view of the present invention;

[0024] Figure 2 This is a structural view of the quick reset push rod assembly described in this invention.

[0025] Diagram: 1. Linkage rod, 2. Top rod axle bracket, 3. Quick-reset top rod assembly, 4. Action master set, 5. Action master set reset rod, 6. Action cam, 7. Brake wood, 8. Hammer structure, 9. Support wood, 10. Back rail, 11. Damper rod, 12. Damper rod axle bracket, 13. Action spring, 14. Top rod cam, 15. Adjusting screw, 16. Expansion structure, 17. Hook rope, 18. Top rod body, 19. Hook spring, 20. Longitudinal pivot, 21. Opening, 22. Pad. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0027] Embodiments of the present invention relate to an upright piano action capable of rapid repetition, such as... Figure 1As shown in Figure 2, the device includes a linkage rod 1, a push rod bracket 2, and a quick-reset push rod assembly 3. The push rod bracket 2 is vertically mounted on the middle of the linkage rod 1. The upper end of the push rod bracket 2 is rotatably connected to the lower end of the quick-reset push rod assembly 3 via a rotating shaft. The left end of the linkage rod 1 is rotatably connected to the lower end of the action mechanism assembly 4 via a linkage bracket. A striker cam 6 is rotatably mounted on the upper right side of the action mechanism assembly 4. The upper end of the quick-reset push rod assembly 3 matches the lower right side of the striker cam 6. A string is mounted on the striker cam 6. The hammer structure 8, the quick reset push rod assembly 3 includes a push rod cam 14, a push rod body 18 and an adjusting screw 15. The lower left end of the push rod cam 14 is rotatably connected to the push rod shaft bracket 2. The upper left end of the push rod cam 14 is equipped with an adjusting screw 15 that passes through the end of the push rod cam 14. The lower end of the push rod body 18 adopts an expansion structure 16. The expansion structure 16 is connected to the push rod cam 14 through a longitudinal rotating shaft 20. The lower end of the expansion structure 16 is provided with an opening 21. The left inner wall of the opening 21 corresponds to the adjusting screw 15.

[0028] In this design, the quick reset push rod assembly 3 is divided into two sections: push rod cam 14 and push rod body 18. The two sections are connected by a longitudinal rotating shaft 20. The push rod body 18 can swing around the longitudinal rotating shaft 20. An adjusting screw 15 is provided in the push rod cam 14 to adjust the swing range of the push rod body 18. When a "choking" situation occurs, the push rod body 18 can swing to avoid the interference of the rotor cam 6 and ensure smooth reset.

[0029] Compared to the traditional push rod design with one degree of freedom, this design adds one degree of freedom to the push rod, allowing the end of the quick-reset push rod assembly 3 to better engage with the rotary cam 6.

[0030] As a supplement to this technical solution, the expansion structure 16 is equipped with a hook rope 17 extending to the right, and the top rod body 18 is equipped with a hook spring 19 in the middle. One end of the hook spring 19 extends to the right and bends towards the hook rope 17, and the extended end of the hook spring 19 hooks the hook rope 17.

[0031] A hook spring 19 is provided in the push rod body 18, and a hook rope 17 is provided in the push rod cam 14. The hook spring 19 is hooked in the hook rope 17 to ensure that the push rod body 18 abuts against the adjusting screw 15, thus ensuring that the push rod body 18 is in an accurate position.

[0032] As a supplement to this technical solution, an impactor spring 13 is installed on the impactor cam 6, and the lower end of the impactor spring 13 abuts against the upper right side of the quick reset push rod assembly 3.

[0033] A spring 13 is installed on the cam 6 of the cam, which can move together with the cam 6 and be reset by the elastic auxiliary device. In this design, the push rod brake is eliminated and replaced by the spring 13 providing a one-to-one limit for the quick reset push rod assembly 3.

[0034] As a supplement to this technical solution, one end of the rotor spring 13 is fitted onto the upper surface of the rotor cam 6 with a rod-like structure, and the other end of the rotor spring 13 is fitted onto the upper right side of the top rod assembly 3 with a ring structure. The middle part of the rotor spring 13 is a torsion spring structure.

[0035] By setting one end of the impactor spring 13 into a rod-shaped structure, the impactor spring 13 is easy to position during installation, and the bonding strength between the two is also improved. By setting the other end of the impactor spring 13 into a ring structure, the ring structure will not damage the quick reset push rod assembly 3 during the process of abutting against the upper end of the quick reset push rod assembly 3, thus ensuring the service life of the structure.

[0036] As a supplement to this technical solution, pads 22 are provided on both the left and right side walls of the opening 21. By providing the pad structure, the opening 21 and the contact part between the adjusting screw 15 and the push rod cam 14 are protected.

[0037] As a supplement to this technical solution, a spring is installed on the right end of the linkage rod 1, and the lower right end of the push rod cam 14 always presses against the upper end of the spring, thereby resetting the push rod cam 14 by installing the spring.

[0038] As a supplement to this technical solution, a brake wood 7 extending to the right is installed on the right side of the rotor cam 6, and a support wood 9 corresponding to the brake wood 7 is provided at the right end of the linkage rod 1. The rotor cam 6 is reset by setting the brake wood 7 and the support wood 9.

[0039] As a supplement to this technical solution, a hammer action bracket 5 is installed on the right side of the hammer action main block 4, and a back block 10 is provided on the upper right side of the hammer structure 8. The front end of the back block 10 is connected and fixed to the upper right end of the hammer action bracket 5, and the lower end of the back block 10 is connected to the lower side of the upper right corner of the hammer action bracket 5.

[0040] In this technical solution, a reset lever 5 is provided to the main action 4 to provide a reset elastic force, and the elastic rod structure 10 is used to ensure that the main action 4 resets quickly when the playing force is lost.

[0041] As a supplement to this technical solution, a damper shaft bracket 12 is installed on the upper left side of the main action 4. The left end of the damper shaft bracket 12 extends out of the main action 4, and the damper shaft bracket 12 is rotatably connected to the middle part of the damper 11 through a rotating shaft.

[0042] Example

[0043] In the static state, both the linkage and the rotary actuator are in the initial position. The push rod body 18 on the quick reset push rod assembly 3 is pressured by the rotary actuator cam 6 and disengages from the adjusting screw 15 on the push rod cam 14.

[0044] When the key is pressed to the disconnect position, the entire linkage moves upward, and the push rod cam 14 and the main action 4 of the action mechanism begin to rotate. At this time, the push rod body 18 tends to disengage from the action cam 6.

[0045] As the key is fully pressed down, the push rod body 18 and the push rod cam 14 disengage from the hammer cam 6, and the hammer drives the hammer structure 8 to strike the string. At this time, the spring between the push rod cam 14 and the linkage rod 1 begins to store energy under the thrust of the quick-reset push rod assembly 3.

[0046] When the piano key is released, the entire linkage moves downward. While the hammer is resetting, the hammer spring 13 applies a pushing force to the quick reset push rod assembly 3, assisting the quick reset push rod assembly 3 in resetting.

[0047] The above provides a detailed description of an upright piano action mechanism capable of rapid repetition provided by this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A vertical piano stricking mechanism capable of rapid repetition, characterized in that: The utility model relates to a kind of stringed instrument, including linkage rod (1), top rod axle bracket (2) and fast reset top rod component (3), the linkage rod (1) middle part is vertically installed with top rod axle bracket (2), the top rod axle bracket (2) upper end is rotatably connected with the lower end of fast reset top rod component (3) by pivot, the left end of linkage rod (1) is rotatably connected with the lower end of percussion machine total gear (4) by linkage rod axle bracket, the upper end right part of percussion machine total gear (4) is rotatably installed with percussion machine cam (6), the upper end of fast reset top rod component (3) is matched with the lower end right side of percussion machine cam (6), the percussion machine cam (6) is installed with hammer structure (8), and the fast reset top rod component (3) includes top rod cam (14), top rod body (18) and adjusting screw (15), the lower left end of top rod cam (14) is rotatably connected with top rod axle bracket (2), the left upper end of top rod cam (14) is installed with adjusting screw (15) passing through the end of top rod cam (14), the lower end of top rod body (18) is with expansion structure (16), the expansion structure (16) is butted with top rod cam (14) by longitudinal pivot (20), the lower end of expansion structure (16) is provided with opening (21), the left side inner wall of opening (21) corresponds with adjusting screw (15), the expansion structure (16) is installed with hook rope (17) that extends to right, the middle part of top rod body (18) is installed with hook spring (19), one end of hook spring (19) extends to right, and it is curved and extends to the direction of hook rope (17), the extending end of hook spring (19) hooks hook rope (17), the percussion machine cam (6) is installed with percussion machine spring (13), the lower end of percussion machine spring (13) is in contact with the right side of the upper end of fast reset top rod component (3), one end of percussion machine spring (13) is sticked on the upper end surface of percussion machine cam (6) with rod structure, the other end of percussion machine spring (13) is in contact with the right side of the upper end of fast reset top rod component (3) with circular ring structure, and the middle part of percussion machine spring (13) is with torsion spring structure.

2. A string striker for a vertical piano capable of rapid repetition as defined in claim 1, characterized in that: The left and right two side walls of opening (21) are provided with pad (22).

3. The string striker of a vertical piano capable of rapid repetition according to claim 1, characterized in that: The right end of linkage rod (1) is installed with spring piece, and the lower side of the right end of top rod cam (14) is always pressed on the upper end of spring piece.

4. The string striker of a vertical piano capable of rapid repetition according to claim 1, characterized in that: The right side of percussion machine cam (6) is installed with brake wood (7) that extends to right, and the right end of linkage rod (1) is provided with supporting wood (9) corresponding to brake wood (7).

5. The string striker of a vertical piano capable of rapid repetition according to claim 1, characterized in that: The right side of percussion machine total gear (4) is installed with percussion machine support (5), the middle upper right side of hammer structure (8) is provided with back gear (10), the front end of back gear (10) is connected and fixed with the right upper end of percussion machine support (5), and the lower end of back gear (10) is butted with the lower side of the right upper corner of percussion machine support (5).

6. A string striker for a vertical piano capable of rapid repetition as defined in claim 1, wherein: The upper left part of the total string machine rack (4) is provided with a mute rod shaft support (12), the left end of the mute rod shaft support (12) extends out of the total string machine rack (4), and the mute rod shaft support (12) is rotationally connected with the middle part of the mute rod (11) through a rotating shaft.

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