CN106531126B - Vertical piano - Google Patents

Abstract

The application relates to an upright piano, which comprises a key, strings (4) and a string striking mechanism, wherein the strings (4) and the string striking mechanism are arranged corresponding to the key, the string striking mechanism comprises a hammer assembly (3), a jack (9) and a jack resetting device, the jack (9) can rotate around a first pivot point so as to drive the hammer assembly (3) to rotate around a second pivot point to strike the strings (4), and the jack resetting device can rotate along with the hammer assembly (3) and is used for exerting a force on the jack (9) to enable the jack (9) to pivot towards a direction far away from the key after external force applied to the key is released. The upright piano is beneficial to the ejector rod in the string striking mechanism to quickly return to a state of abutting against the bottom of the cam of the butt, the whole mechanism is quickly converted into a string striking state so as to improve the playing sensitivity of the upright piano and adapt to quick continuous playing. Moreover, the upright piano has a simple structure, can simplify the processing technology and the installation and adjustment technology, and can save materials.

Description

Vertical piano

Technical Field

The application relates to the field of pianos, in particular to an upright piano.

Background

Piano enjoys a reputation of the band in its broad range of tones, graceful tone and unique performance, known as the king of the instrument. With the continuous development of society, pianos are increasingly favored by people in China, and in recent years, the yield of pianos in China is suddenly increased, the market of pianos is huge, and various brands of pianos abroad are also in mass. Although the variety of pianos is various, the structure of the string striking mechanism adopted by the existing upright pianos is basically the same or different, the main structure of the string striking mechanism is still changed after long-term development, and each piano manufacturer improves the tone quality and the quality of the pianos from the angles of improving materials or optimizing processes.

The prior art upright piano string striking mechanism generally adopts the structure shown in fig. 1, the white key 15 and the black key 16 (collectively called keys) are installed on the chassis through the front gear 13, the middle gear 14 and the rear gear 12, the linkage rod 18 is respectively installed on the total gear 8 through the linkage shaft bracket 10, the butt cam 33 is respectively installed on the total gear 8 through the butt shaft bracket 7 and the adjusting button 19 through the crab pincers 22, the total gear 8 is installed on the bracket 5, the bolt 1 passes through the iron plate 2 to be used for fixing the bracket 5, the clamp 17 is arranged below the linkage rod 18, the clamp 17 is installed on one end of the key far away from a player, the playing force born by the key is transmitted to the linkage rod 18 through the clamp 17, the climbing hook 211 and the supporting wood rod 201 are installed on the linkage rod 18, and the supporting wood 202 adhered with the supporting wood felt 203 is installed on the supporting wood rod 201. The ejector rod 9 is jointly arranged on the linkage rod 18 through the ejector rod shaft bracket 11 and the ejector rod spring; the stopper wood 205 to which the stopper wood sheet 204 is attached to the butt cam 33 via the stopper lever 206 and the hammer 31 via the hammer shank 32, respectively, and the connection with the strap hook 211 is achieved via the strap 212 attached under the stopper wood 205. Referring to fig. 5, the damper head 25 is mounted on the damper rod 29 through the damper wire 40, the damper rod 29 is mounted on the main rail 8 through the damper shaft bracket 30, and the torsion of the damper spring 50 mounted on the damper rod 29 causes the damper head 25 to be closely attached to the strings 4.

Next, the operation principle of such an upright piano striking mechanism will be described. When the integral structure of the upright piano striking mechanism is in an initial state (or called home or rest state), the key is supported by the center rail 14 and the rear rail 12, the interlocking lever 18 is supported by the clip 17, the hammer shank 32 is supported by the back rail 6, and the upper end of the jack 9 abuts against the lower portion of the butt cam 33.

When a player applies a playing force to the key, the front part of the key is stressed downwards, the middle rail 14 is taken as a fulcrum, the clamp 17 works according to the lever principle, the clamp pin 17 upwards jacks up the linkage rod 18, the general rail 8, the butt cam 33 and the ejector rod 9 work according to the four-bar principle, the ejector rod 9 jacks up the lower part of the butt cam 33, and the butt cam 33 drives the hammer 31 to move towards the direction of the string 4 by taking the butt shaft bracket 7 as the circle center so as to strike the string subsequently. When the hammer 31 moves to a distance of 2mm to 3mm from the string 4, the convex portion of the lower portion of the jack 9 is brought into contact with the bottom surface of the knob 19 and restrained so that the upper end portion of the jack 9 is disengaged from the lower portion of the butt cam 33, a so-called "disconnected" state, so that the hammer 31 has a space for free vibration by inertial striking and string. When the front part of the key is lowered to the bottom and is stationary by the action of the playing force, the stopper 205 on the hammer cam 33 is stopped from moving by contact with the supporting wood 202 in the return stroke of the hammer 31, so that a space is reserved for the upper end of the jack 9 to return to the original position in time for the next striking.

After the playing force is removed, all parts of the string striking mechanism quickly return to the original positions under the action of gravity, and the whole string striking process is realized. When the string is tapped, a good resetting action is performed on the hammer assembly 3 due to the connection of the bridle strap 212.

In practical production and use of the upright piano, the performance of the upright piano is limited to the structure of the string-striking machine, and the playing performance of the upright piano is not as fast and sensitive as that of a deltoid piano, particularly, repeated continuous and rapid playing of keys cannot be realized when the half stroke of the key is depressed and the key is not depressed, and when the design, the installation or the adjustment is slightly out of place, if the key is flicked, slowly flicked or the rapid combined playing is performed, the phenomenon that the ejector rod 9 cannot be reset in time and is blocked often occurs due to the slow fallback or half stroke fallback of the string-striking mechanism and the keyboard mechanism, so that the hammer 31 cannot perform string-striking operation any more, the piano cannot sound, the touch feeling of playing and the expression of music are directly influenced, and the rapid continuous playing requirement of a player is difficult to adapt.

Disclosure of Invention

The application provides an upright piano, which can improve the playing sensitivity of the upright piano so as to better adapt to the rapid continuous playing requirement.

In order to achieve the above object, the present application provides an upright piano comprising a key, strings provided in correspondence with the key, and a striking mechanism including a hammer assembly, a jack rotatable about a first pivot point to thereby drive the hammer assembly to rotate about a second pivot point to strike the strings, and a jack resetting means rotatable with the hammer assembly for exerting a force on the jack after an external force applied to the key is released to drive the jack to pivot in a direction away from the key.

Further, the hammer assembly includes a butt cam and a hammer shank, one end of the hammer shank being provided with a hammer and the other end thereof being fixedly disposed with respect to the butt cam, the butt cam being rotatable about the second pivot point to rotate the hammer shank, and the jack resetting device being provided on the hammer shank and/or the butt cam.

Further, the jack resetting device includes a driving member, one end of which is provided on the hammer assembly, and the other end of which is capable of applying a pushing force thereto in contact with the jack after release of an external force applied to the key, so that the jack is rotated in a direction away from the key.

Further, the other end of the driving member is provided with a bent portion capable of abutting the jack to exert the pushing force thereon after the external force applied to the key is released.

Further, the shape of the curved portion includes a hook shape, a circle shape, a polygon shape, or an oblong shape.

Further, an elastic member is provided between the jack resetting means and the jack such that the elastic member is in a stretched state before the hammer assembly strikes the string; after the hammer assembly strikes the string, the elastic member contracts to pull the jack resetting device toward the jack.

Further, the elastic element is a spring.

Further, one of the ejector rod and the ejector rod resetting device is provided with a bulge, and the bulge is positioned between the ejector rod and the ejector rod resetting device; and

the projection is configured to abut against the other of the jack and the jack return means to stop the rotational fall back of the hammer assembly before the jack hits the butt cam, while the key is at rest by being depressed to the lowest position by the playing force and the hammer assembly is in the rotational fall back.

Further, the cross-sectional shape of the protrusion includes a portion of a circle or a polygon.

Further, the method comprises the steps of, the protrusion is disposed on the ejector rod adjacent to the upper end thereof.

Further, the device also comprises a silencing component, wherein the silencing component is arranged on one of the ejector rod and the ejector rod resetting device and is used for absorbing noise generated when the ejector rod resetting device is abutted with the ejector rod.

Further, the sound attenuating member includes a cushioning structure.

Further, the sound attenuating member includes a buffer layer.

Further, the material of the buffer layer includes chamois or felt.

According to the vertical piano disclosed by the application, the hammer component in the string striking mechanism is provided with the ejector rod resetting device, so that the ejector rod can rotate along with the hammer component after the external force applied to the key is released to apply acting force to the ejector rod so as to force the ejector rod to rotate towards the direction far away from the key, the ejector rod can be quickly returned to the original state of abutting against the bottom of the butt cam, the whole mechanism is quickly converted into the string striking state, the string striking can be repeatedly played when the key is slightly away from the position pressed to the bottom, and the playing sensitivity of the vertical piano can be improved, so that the vertical piano is suitable for quick continuous playing. Moreover, the upright piano string striking machine has simple structure, can simplify the processing technology and the installation and adjustment technology, and can save materials, thereby reducing the production cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a view of a prior art upright piano a string striking mechanism structure schematic diagram;

fig. 2 to 4 are schematic structural views showing an embodiment of a string striking mechanism in an upright piano of the present application in an initial state, a disconnected state and a key-press-to-bottom state, respectively;

fig. 5 to 7 are main structural schematic views of parts of the upright piano shown in fig. 2 to 4, respectively, corresponding to the initial state, disconnected state and key-pressed-to-bottom state of the action mechanism;

fig. 8a to 8f are schematic views of various shapes that can be adopted when the driving member is a bent lever in the upright piano of the present application;

fig. 9a and 9b are schematic views of two structures of a driving member in an upright piano of the present application, respectively;

FIGS. 10a to 10g are schematic views showing various structures that can be adopted for the silencing structure provided on the ejector pin;

FIGS. 11 and 12 are front and perspective views, respectively, of one embodiment of a carrier rod;

fig. 13 is a schematic view showing a structure in which a driving member is mounted on a butt cam in the upright piano of the present application.

Description of the reference numerals

1-a bolt; 2-iron plates; 3-hammer assembly; 4-strings; 5-a bracket; 6-backing; 7-a butt cam butt pedestal; 8-Total a gear; 9-ejector rods; 10-a linkage shaft bracket; 11-ejector rod a shaft bracket; 12-post a gear; 13-front gear; 14-mid range; 15-white bond; 16-black keys; 17-staple; 18-linkage rod; 19-adjusting buttons; 20-limiting components; a 21-bridle strap assembly; 22-crab pincers; 23-an elastic element; 24-drive a piece; 25-making sound heads; 26-a protrusion; 27-a buffer layer; 28-spoon nails; 29-a sound producing rod; 30-damper axle brackets; 40-making a sound lead screw; 50-producing sound a spring;

31-hammer; 32-hammer shank; 33-butt cam; 34-chamois; 61-backing felt; 91-mounting a ring; 201-supporting a wood rod; 202-supporting wood; 203-supporting wood a felt; 204-braking the veneer; 205-braking wood; 206-a brake lever; 211-climbing hook; 212-climbing belt; a-a first pivot point; b-a second pivot point.

Detailed Description

The present application is described in detail below. In the following paragraphs, the different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless explicitly stated to be non-combinable. In particular, any feature or features may be combined with one or more other features may be desired and advantageous.

The terms "first," "second," and the like in the present application are merely for convenience of description to distinguish between different constituent components having the same name, and do not denote a sequential or primary or secondary relationship.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "far" and "near" etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application, and do not indicate or imply that the apparatus must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application.

Aiming at the problem that the upright piano in the prior art has discontinuous in use caused by larger sensitivity difference in playing, the inventor finds that the main reason for the problem is as follows: in the process of the hammer assembly 3 falling back after the hammer 31 hits the string, the falling back process of the hammer assembly 3 is limited only by the limiting assembly 20, so that the jack 9 has sufficient time and space to return freely, but factors of design, installation or adjustment which are not in place cannot be avoided in practice, in this case, when a player flicks, slowly flicks the key or rapidly allies, the jack 9 cannot return in time to be blocked, and the hammer 31 cannot perform the next string hitting operation any more.

On the basis of analyzing the cause of the problem, the inventor intends to realize the return of the ejector rod 9 by actively driving through structural improvement, and according to the thought, the application provides an improved quick and effective return structure of the upright piano string striking machine, and the relevant parts of the improvement points are mainly described on the basis of the prior art.

In an exemplary embodiment, as shown in fig. 2 to 7 and 13, the upright piano includes keys, strings 4 and striking mechanisms provided in correspondence with the keys, each of the keys corresponding to a set of the co-dullness strings 4 and striking mechanisms. Wherein, hit string mechanism includes: the hammer assembly 3, the jack 9, and the jack resetting device, the hammer assembly 3 includes a hammer 31, a hammer shank 32, and a butt cam 33, one end of the hammer shank 32 is provided with the hammer 31 and the other end thereof is fixedly disposed with respect to the butt cam 33, and the butt cam 33 is rotatable about the second pivot point B to rotate the hammer shank 32. The jack 9 is rotatable about the first pivot point a to thereby drive the butt cam 33 to rotate about the second pivot point B to strike the hammer 31 on the string 4, and the jack resetting means is rotatable with the hammer assembly 3 for exerting a force on the jack 9 to pivot the jack 9 in a direction away from the key after the external force exerted on the key is released. The first pivot point a is the axis of the coupler shaft frame 10, and is a point at which the jack 9 rotates relative to the coupler shaft frame 10, and the second pivot point B is the axis of the butt shaft frame 7, and is a point at which the butt cam 33 rotates relative to the butt shaft frame 7.

In the initial (home) state, as shown in fig. 2 and 5, the end of the jack 9 adjacent to the hammer assembly 3 abuts against the bottom of the butt cam 33, the linkage 18, the rail 8, the butt cam 33 and the jack 9 form a four-bar mechanism, and during the key depression, the staple 17 lifts up the linkage 18, the four-bar mechanism operates to rotate the jack 9 counterclockwise about the first pivot point a to lift the lower portion of the butt cam 33, and drives the butt cam 33 to rotate counterclockwise about the second pivot point B to drive the hammer 31 to move in the direction of the string 4 through the hammer shank 32 to strike the string. A chamois 34 is provided at the bottom of the butt cam 33 to increase friction between the jack 9 and the butt cam 33.

When the head of the hammer 31 moves to a predetermined distance (e.g., 2mm to 3 mm) from the string 4, the convex portion of the lower portion of the L-shaped jack 9 comes into contact with the bottom surface of the knob 19 and is restrained, in the disconnected state shown in fig. 3 and 6, i.e., the state in which the jack 9 and the butt cam 33 are about to be separated. At this time, in the process of continuing to press the key downward until reaching the bottom, as shown in fig. 4 and 7, the jack 9 rotates clockwise with the contact position of the protruding portion with the knob 19 as a fulcrum, so that the end of the jack 9 adjacent to the hammer assembly 3 rotates toward the side close to the key to be disengaged from the bottom of the butt cam 33, providing a space for returning the hammer assembly 3 after striking the string, and in the returning process, the jack resetting device is stopped by the limit of the jack 9, leaving a proper space for resetting the jack 9. After the external force applied to the key is released, the hammer assembly 3 returns under the action of gravity, the jack resetting device rotates along with the force and applies the acting force to the jack 9, so that the jack 9 rotates towards the direction away from the key, the jack 9 is kept to be in the original position, and the jack 9 is in the state of striking strings again.

This embodiment upright piano in the course of the operation of the machine, the ejector pin resetting device can bring about at least one of the following advantages.

(1) When the hammer 31 in the hammer assembly 3 is at rest with the key continuously depressed at the lowest position by the playing force after the striking of the string is completed, the hammer 31 is sprung back by the rebound force of the string 4 and falls back under the action of gravity, at which time the string 4 is free to vibrate. When the hammer assembly 3 rotates clockwise to fall back toward the jack 9, before the butt cam 33 hits the jack 9, the jack resetting means hits the jack 9 to be caught, preferably, the jack resetting means contacts with the upper end of the jack 9, so that the falling back movement of the hammer assembly 3 is stopped. The contact between the ejector rod resetting device and the ejector rod 9 can replace the contact between the brake veneer 204 and the wood supporting felt 203 in the existing structure, so that the function of stopping the hammer 31 from falling back is realized.

(2) When the playing force is removed, that is, after the fingers of the player leave the keys, the whole string striking mechanism returns to the original position due to the action of gravity, in the process, the hammer assembly 3 continues to rotate clockwise and falls back, and drives the ejector rod resetting device to apply an acting force to the ejector rod 9, so that the ejector rod 9 is pushed to rotate anticlockwise to the original position against the bottom of the butt cam 33, the acting force is beneficial to improving the return of the ejector rod 9, and meanwhile, the rest parts of the string striking mechanism quickly return to the original position, so that the whole mechanism is quickly converted into the string striking state.

Therefore, the reset structure of the vertical piano string striking machine can effectively solve the problems that the structure in the prior art is not installed or adjusted in place, and the ejector rod 9 is often blocked and cannot strike strings any more because of being unable to return in time, the ejector rod 9 is pushed back to the position contacted with the bottom of the cam 33 of the butt machine by actively applying external force, and the ejector rod 9 is always kept in an excited state after the external force applied to the keys is withdrawn, so that the strings can be repeatedly struck at the position where the keys are slightly separated from the positions pressed to the bottoms, the play sensitivity of the vertical piano is improved, the single bond has better continuous striking performance, and the vertical piano is suitable for rapid continuous playing, and is more free and handy. Thus, when the player flicks, slowly flicks the key or rapidly allies, the upright piano can sound reliably.

According to the functions realized by the ejector rod resetting device, it can be known that the ejector rod resetting device is arranged to replace the limiting component 20 and the climbing belt component 21 in the prior art shown in fig. 1, so that the structure of the string striking mechanism is greatly simplified, and raw material consumption of wood, felt, leather and the like is saved. Because the homophone group string striking mechanism which is matched with 88 keys in number is arranged in the piano, the processing technology and the installation and adjustment technology of the whole piano can be greatly simplified, materials can be saved, and the production cost is reduced.

In addition, the ejector rod resetting device replaces the limiting component 20 and the climbing belt component 21 in the prior art, so that a certain space can be saved between the string striking mechanism and the shell component, and the space of the shell component is reduced; in addition, the structure of the application can effectively avoid the phenomenon that the hands of the operator are easily scratched by the climbing hooks 211 when the existing upright piano is uncapped because the climbing hooks 211 are removed.

In the embodiment of the present application, the jack resetting means may be provided on the hammer shank 32 or the butt cam 33 as required, or may be provided on both the hammer shank 32 and the butt cam 33. Preferably, as shown in fig. 13, the ejector pin resetting device is provided on the butt cam 33, and can drive the ejector pin 9 to rotate at a position closer to the butt cam, so that the length or the volume of the ejector pin resetting device can be reduced, and the rigidity of the ejector pin resetting device can be easily ensured.

In one specific structural form, the jack resetting means includes a driving member 24, one end of the driving member 24 is fixed to the hammer assembly 3, the other end of the driving piece 24 can be brought into contact with the jack 9 to exert a pushing force thereon after the external force exerted on the key is released, so that the jack 9 is turned in a direction away from the key. Fig. 13 shows a schematic structural view of connecting one end of the driver 24 to the side of the butt cam 33 near the key.

As a preferred embodiment, the driving member 24 is a rod-like member, and a first end of the driving member 24 is connected to the hammer assembly 3, for example, to the butt cam 33, and a second end of the driving member 24 is used to apply a pushing force to the jack 9. The first and second ends mentioned herein are both directed to the rod-like member as a whole. Alternatively, the driving member 24 may be designed as a plate-like member or a block-like member or the like.

The embodiments described below each take the driving member 24 as a rod-like member. Depending on the function to be performed by the driver 24, the rod-like member may be linear or curved. Wherein the bending bar can better adapt to the requirements of mounting or applying a pushing force to the ejector rod 9. In a specific structural form, when the driving member 24 is a bent lever, the first end of the bent lever serves as a connecting portion for connecting with the hammer assembly 3, and the second end of the bent lever is provided with a bent portion capable of abutting against the jack 9 to exert a pushing force thereon after the external force applied to the key is released, so that the upper tip end portion of the jack 9 is always kept in a state of being in contact with the bottom of the butt cam 33.

The following gives a possible form of construction of the bending bar, as shown in fig. 8a to 8 f. In fig. 8a and 8b, the bending portion is oblong, and the bending portion is bent to a side away from the butt cam 33 and the free end abuts on the connecting portion, except that the height at which the second end of the bending lever abuts on the connecting portion is higher in fig. 8a compared to fig. 8 b. The portion bent to the side away from the butt cam 33 can play a role in reinforcing the overall structure of the bending lever, and the oblong bending portion has a superior reinforcing effect, and in the embodiment to be given later on in which the elastic member 23 needs to be mounted, it can be ensured that the elastic member 23 is fixed reliably and does not fall off. In fig. 8c to 8e, the bent portion is bent in a hook shape to a side away from the butt cam 33, and in an embodiment to be given later, in which the elastic member 23 is required to be mounted, the elastic member 23 is easily hooked, the free end of the hook shape is in a straight line in fig. 8c, the free end of the hook shape is bent outward in fig. 8d, and the free end of the hook shape is bent inward in fig. 8 e. In fig. 8f, the curvature is configured as a triangle, or other polygons are possible.

Alternatively, as shown in fig. 8a to 8d, 8f, the connecting portion is configured in a right-angle shape, and preferably, the axis of the connecting portion with the butt cam 33 on the connecting portion is perpendicular to the axis of the hammer shank 32. As shown in fig. 8e, the connection portion is configured in an arc shape, forming an S-shaped structure together with the hook-shaped bent portion.

On the basis of the various structural forms of the bending rod, as shown in fig. 9a and 9b, the cross section of the bending rod can be circular, elliptical, triangular or rectangular. For example, fig. 9a shows a curved bar with a circular cross section, and fig. 9b shows a curved bar with a rectangular cross section, with an overall band shape.

In terms of material use, the bending bar may be selected from any material having a certain strength, such as a rigid plastic or a metal material. Preferably, the bending bar is made of a metal material with higher hardness to ensure its own strength.

For the embodiment of the present application, after the external force applied to the key is released, the hammer assembly 3 can fall back by gravity, though, with the jack resetting means rotated accordingly to apply a force to the jack 9. In order to be able to further improve the reliability of the applied force, in a preferred embodiment, as shown in fig. 5 to 7, the striking mechanism of the upright piano further comprises an elastic member 23, the elastic member 23 being disposed between the jack resetting means and the jack 9, so that the elastic member 23 is in a stretched state before the hammer 31 strikes the string; after the hammer 31 strikes the string 4, the elastic member 23 contracts to pull the jack resetting means toward the jack 9. For example, the elastic member 23 may be an elastic member such as a spring.

Specifically, as shown in fig. 11 and 12, a mounting ring 91 may be provided on the side of the jack 9 facing the player, one end of an elastic member 23 (e.g., a spring) being attached to the mounting ring 91, and the other end being hooked to the bent portion of the bent lever.

In the initial state, as shown in fig. 5, the elastic element 23 (e.g., spring) is in a free state; in the process of pressing the key to push the butt cam 33 by the jack 9 to rotate the hammer 31 counterclockwise to strike the string, as shown in fig. 6, the driver 24 rotates together with the butt cam 33 to put the elastic member 23 in a stretched state; during the rebound after the striking of the hammer 31, as shown in fig. 7, the elastic member 23 is partially retracted so that the driving piece 24 abuts against the upper end of the jack 9; after the external force applied to the key is released, the elastic member 23 returns to the free state, and the force provided in this process can assist the gravity of the hammer assembly 3 together with the driver 24 to promptly return to apply the force to the jack 9. The provision of the elastic member 23 makes it possible to more rapidly switch the overall mechanism to the string striking state, and improves the play sensitivity of the upright piano, thereby further accommodating rapid continuous play.

Further, one of the ejector 9 and the ejector resetting means has a projection 26, the projection 26 being located between the ejector 9 and the ejector resetting means. When the key is depressed to the lowest position by the playing force while being stationary and the hammer assembly 3 is in the rotational fall, the projections 26 are configured to abut against the other of the jack 9 and the jack resetting means to stop the rotational fall of the hammer assembly 3 before the jack 9 hits the butt cam 33. The projections 26 can limit the hammer assembly 3 during the return after the hammer assembly 3 strikes the string 4, to make room for the return of the jack 9. As shown in fig. 11, a projection 26 is preferably provided on the ejector rod 9.

Preferably, a projection 26 is provided on the ejector rod 9 adjacent to its upper end.

Specifically, the cross-sectional shape of the protrusion 26 includes a portion of a circle or a polygon. Fig. 10a to 10f schematically show the projections 26 in different configurations, the projections 26 in fig. 10a being of quarter-circular cross-section, the projections 26 in fig. 10b being of semi-circular cross-section, the projections 26 in fig. 10c being of approximately circular cross-section, the projections 26 in fig. 10d being of triangular cross-section, the projections 26 in fig. 10e being of rectangular cross-section and being partly embedded in the carrier rod 9, the projections 26 in fig. 10f being of rectangular cross-section and being provided on the surface of the carrier rod 9. Thus, the first and second substrates are bonded together, the cross-section of the projection 26 may include a portion of a circle, a polygon, or other annular shape.

In another embodiment of the present application, the string striking mechanism further includes a silencing structure, which is located between the ejector rod 9 and the ejector rod resetting device (e.g., the driving member 24) and on one of the ejector rod 9 and the ejector rod resetting device, for absorbing collision noise generated when the ejector rod resetting device abuts against the ejector rod 9. Preferably, the sound deadening structure is provided on the upper end portion of the jack 9 on the side facing the player. Through setting up amortization structure not only can absorb the noise that sends when hammer subassembly 3 returns in-process ejector pin resetting means and ejector pin 9 touch, can also alleviate the collision dynamics when ejector pin resetting means and ejector pin 9 touch simultaneously.

In one implementation, the sound attenuating structures include cushioning material or cushioning structures. Referring to fig. 11 and 12, the cushioning material optionally includes a cushioning layer 27, the cushioning layer 27 being applied to the surface of the projections 26 and/or to the surface area of the ejector 9 that is acted upon by the ejector resetting mechanism, the area of the ejector resetting mechanism that applies force to the ejector 9 being located generally below the projections 26. For example, the buffer layer 27 may be made of a material such as chamois or felt.

Fig. 10a to 10f show schematic structural views of the buffer layer 27 attached when different protrusions 26 are adopted, and the silencing structures of these structural forms can simultaneously eliminate noise generated by the contact of the ejector rod resetting device with the ejector rod 9 in the returning process of the hammer 31 after the striking of the string, and noise generated when the ejector rod resetting device applies a force to the ejector rod 9 after the release of the key.

In other embodiments, as shown in fig. 10g, the silencing structure may be provided without the projection 26, and the buffer layer 27 may be directly attached to the surface area of the ejector return device that contacts the ejector 9.

In order to make the operation principle of the upright piano of the present application more clearly understood by those skilled in the art, the operation of the upright piano of the present application will be described below with reference to fig. 2 to 7.

When the integral structure of the upright piano striking mechanism of the application is in an initial state (or called home state, static state), as shown in fig. 2 and 5, the key is supported by the middle rail 14 and the rear rail 12, the linkage rod 18 is supported by the clamp 17, the hammer shank 32 is supported by the back rail 6, the back rail 6 is provided with a back rail felt 61, the upper end of the ejector rod 9 is propped against the bottom of the butt cam 33, the second end of the driving piece 24 is contacted with the upper part of the ejector rod 9, and all the supporting and contacting parts are provided with felt or leather pads.

When a player applies a playing force to the key, the front part of the key starts to descend, the middle rail 14 is taken as a fulcrum and works according to the lever principle, the clamp 17 upwards jacks the linkage rod 18, the general rail 8, the butt cam 33 and the ejector rod 9 work according to the four-bar principle, the ejector rod 9 upwards jacks the bottom of the butt cam 33, and after the butt cam 33 is stressed, the hammer 31 mounted on the hammer is driven to move towards the direction of the string 4 by taking the second pivot point B as a circle center, so that the aim of striking the string is fulfilled. At the same time, the driving member 24 is moved away from the carrier rod 9 and the spring 23 is stretched. As shown in fig. 3 and 6, when the hammer 31 travels to a distance of 2mm to 3mm from the string 4, the convex portion of the lower portion of the jack 9 comes into contact with the bottom surface of the knob 19 and is restrained, at which time the striking mechanism is about to enter the disconnected state, and the spring 23 continues to be stretched. Meanwhile, in the process of depressing the key, the interlinking lever 18 drives the spoon pin 28 to press the lower end of the damper lever 29 away from the player, and the damper lever 29 rotates clockwise about the damper shaft 30 as the center, and the damper head 25 is away from the string 4, so that the string 4 can vibrate.

When the front part of the key is lowered to the bottom by the action of the playing force and is stationary, as shown in fig. 4 and 7, the jack 9 rotates clockwise around the contact position of the boss portion of itself with the knob 19 as a fulcrum, so that the upper end portion of the jack 9 is disengaged from the bottom of the butt cam 33, allowing the hammer 31 a space free to strike the string and the string 4 to vibrate. After the hammer 31 hits the string 4, the rebound force of the hammer 31 hitting the string and the contraction force of the spring 23 return the hammer 31 away from the string 4, and in the return process, the driving piece 24 on the butt cam 33 contacts with the buffer layer 27 on the surface of the boss 26 on the upper part of the jack 9, the return movement is stopped, and the movement of the hammer 31 is stopped, so that the string 4 is in a free vibration state, and the rest time for the key to descend to the bottom, namely the delay time of the string vibration, is maintained. This state also leaves space and time for the upper end of the ejector rod 9 to return to its original position in time. It can be seen from the description that the function of limiting the upper end of the ejector rod 9 to the driving member 24 replaces the function of contacting the wood supporting felt 203 with the brake veneer 204 in the existing structure.

When the playing force applied to the key is released, that is, after the player's finger leaves the key, the parts of the striking mechanism and the parts of the keyboard are quickly restored to their original positions due to the gravity, and at this time, the second end (lower end) of the driving member applies a force to the jack 9 under the gravity of the hammer assembly 3 and the force of the elastic member 23, so that the jack 9 returns to the position contacting the bottom of the butt cam 33, thereby completing the process of striking the string once. In the process of removing the playing force, each part of the string striking mechanism can be quickly converted into a string striking state only by slightly separating the keys from the rest position which is lowered to the bottom, so that the playing force is repeatedly added, and a good continuous and quick string striking effect is achieved.

The above description is made in detail of an upright piano provided by the present application. The principles and embodiments of the present application have been described herein with reference to specific examples, which are intended to be merely illustrative of the methods of the present application and their core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims (11)

1. An upright piano comprising a key, strings (4) provided in correspondence with the key, and a striking mechanism, characterized in that the striking mechanism comprises a hammer assembly (3), a jack (9) and a jack resetting device, wherein the jack (9) is rotatable about a first pivot point to thereby drive the hammer assembly (3) to rotate about a second pivot point to strike the strings (4), the jack resetting device is rotatable with the hammer assembly (3) for exerting a force on the jack (9) to drive the jack (9) to pivot in a direction away from the key after an external force exerted on the key is released;

the hammer assembly (3) includes a butt cam (33) and a hammer shank (32), one end of the hammer shank (32) being provided with a hammer (31) and the other end thereof being fixedly disposed with respect to the butt cam (33), the butt cam (33) being rotatable about the second pivot point to rotate the hammer shank (32); the jack resetting device comprises a driving piece (24), wherein one end of the driving piece (24) is directly connected to the hammer shank (32) and/or the butt cam (33), and the other end of the driving piece (24) can be contacted with the jack (9) to exert thrust force on the driving piece after the external force exerted on the key is released;

one of the ejector rod (9) and the ejector rod resetting device is provided with a bulge (26), and the bulge (26) is positioned between the ejector rod (9) and the ejector rod resetting device; the projection (26) is configured to abut against the other of the jack (9) and the jack resetting means to stop the rotational fall-back of the hammer assembly (3) before the jack (9) hits the butt cam (33) when the key is depressed to the lowest position to be stationary and the hammer assembly (3) is in the rotational fall-back.

2. The upright piano according to claim 1, characterized in that the other end of said driving member (24) is provided with a bent portion capable of abutting against said jack (9) to exert said pushing force thereon after release of an external force applied to the key.

3. The upright piano of claim 2, wherein the shape of said bent portion comprises a hook shape, a circular shape, a polygonal shape or an oblong shape.

4. The upright piano of claim 1, further comprising an elastic element (23), said elastic element (23) being disposed between said jack resetting means and said jack (9) such that said elastic element (23) is in a stretched state before said hammer assembly (3) strikes said string (4); after the hammer assembly (3) strikes the string (4), the elastic member (23) contracts to pull the jack resetting means toward the jack (9).

5. Upright piano according to claim 4, characterized in that said elastic element (23) is a spring.

6. The upright piano of claim 1, characterized in that the cross-sectional shape of said protuberance (26) comprises a portion of a circle or a polygon.

7. Upright piano according to claim 1, characterized in that said protuberance (26) is provided on said jack (9) adjacent to its upper end.

8. The upright piano of claim 1, further comprising a silencing member provided on one of said jack (9) and said jack resetting means for absorbing noise generated when said jack resetting means abuts against said jack (9).

9. The upright piano of claim 8, wherein said sound attenuating member comprises a cushioning structure.

10. The upright piano of claim 8 or, wherein said sound damping member comprises a cushioning layer (27).

11. The upright piano of claim 10, wherein the material of said cushion layer (27) comprises suede or felt.