Key assembly

Abstract

The utility model discloses a key assembly, and relates to the technical field of keys, the key assembly comprises a connecting rod structure, the connecting rod structure comprises an injection molding part and a metal plate; wherein the whole injection molding part is in a V-shaped trend, one end of the injection molding part is a stress end, the other end of the injection molding part is a force application end, and the force application end can hammer the sound production element and reduce resonance of the connecting rod structure; the metal plates are compounded on the two sides of the force application end, so that the connecting rod structure forms a plastic and metal composite part, and the hammering force of the force application end is increased; according to the key assembly, the connecting rod structure formed by compounding the injection molding part and the metal plate is arranged, so that the key assembly can reduce noise caused by resonance of the connecting rod while guaranteeing the precision of the connecting rod, the hammering force of the connecting rod is guaranteed, and then the precision of piano sound is greatly optimized; according to the piano key assembly, the fixed shaft is arranged, so that all the connecting rod structures are assembled on the fixed shaft and limited by the fixed shaft, and the situation that the connecting rod structures fall off when a piano falls off can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of keys, in particular to a key component. Background Art

[0002] For the keys in the prior art, they have a connecting rod structure. When pressing the key body of the key, the connecting rod structure below works synchronously to strike a sound element with a hammer element to achieve the purpose of sounding.

[0003] The connecting rod structures in the prior art generally adopt iron materials. However, the production efficiency of iron materials is low, and the precision of the punching presses for producing iron connecting rod structures is generally not high enough, resulting in inaccurate piano sounds.

[0004] In addition, the metal connecting rod structure will generate a large resonance when striking the sound element, further resulting in inaccurate piano sounds. Content of the Utility Model

[0005] The utility model provides a key component, which has the advantage of high connecting rod precision to solve the problem of inaccurate piano sounds caused by connecting rod resonance in the prior art.

[0006] To achieve the purpose of high connecting rod precision, the utility model provides the following technical solution: a key component, including a connecting rod structure, and the connecting rod structure includes an injection molded part and a metal plate; wherein: the injection molded part as a whole shows a V-shaped trend, and one end of the injection molded part is a force receiving end, and the other end of the injection molded part is a force applying end, and the force applying end can strike on the sound element and reduce the resonance of the connecting rod structure; the metal plate is compounded on both sides of the force applying end, so that the connecting rod structure forms a composite of plastic and metal to increase the hammering force of the force applying end.

[0007] As a preferred technical solution of the utility model, the metal plate and the injection molded part are connected by riveting, gluing, clamping, injection encapsulation, insert molding, hot melt fixing or elastic clamping.

[0008] As a preferred technical solution of the utility model, it further includes a key body and a fixed shaft; wherein: each key body has a connecting rod structure; each injection molded part is provided with a second injection hole, and all the connecting rod structures are assembled on the fixed shaft through the second injection holes and can rotate on the fixed shaft.

[0009] As a preferred technical solution of the utility model, the fixed shaft is an integral metal optical shaft.

[0010] As a preferred technical solution of the utility model, the fixed shaft includes: an elastic inner shaft, and the length of the elastic inner shaft can at least accommodate all the second injection holes; a metal skin, and the metal skin is curled along the circumferential direction of the elastic inner shaft outside the circumference of the elastic inner shaft, and the injection molded part is placed on the metal skin.

[0011] As a preferred technical solution of the present utility model, the metal skins are arranged in a linear matrix on the elastic inner shaft, so that an exposed part is formed on the elastic inner shaft between two adjacent groups of metal skins.

[0012] As a preferred technical solution of the present utility model, an I-shaped metal cylinder is arranged in the second injection hole, and the two I-shaped ends of the I-shaped metal cylinder are defined at both ends of the second injection hole.

[0013] As a preferred technical solution of the present utility model, one end of the key body close to the force-receiving end is the pressing end, and one end of the key body close to the force-applying end is the installation end; a bracket is further included, the bracket is located below the connecting rod structure, a key body assembly ridge for rotatably assembling the installation end is arranged on the bracket, and a limiting ridge for limiting the pressing end is further arranged on the bracket.

[0014] As a preferred technical solution of the present utility model, a convex frame is arranged at a position of the lower part of the key body opposite to the force-receiving end, and the force-receiving end is located inside the convex frame, so that when the key body is pressed down, the convex frame presses down the force-receiving end.

[0015] As a preferred technical solution of the present utility model, a connecting rod assembly ridge is arranged in a region of the bracket opposite to the fixed shaft, an inner cavity is reserved in the connecting rod assembly ridge, and the second injection hole is located in the inner cavity; a shaft hole is opened along the length direction of the piano on the connecting rod assembly ridge, and the fixed shaft is sleeved into the shaft hole; both ends of the fixed shaft are fixed to the edge of the bracket.

[0016] Compared with the prior art, the present utility model provides a key assembly, which has the following beneficial effects:

[0017] 1. For this key assembly, a connecting rod structure composed of an injection molded part and a metal plate is provided, so that the key assembly can reduce the noise caused by the resonance of the connecting rod while ensuring the accuracy of the connecting rod, and ensure the hammering force of the connecting rod, thereby greatly optimizing the accuracy of the piano sound.

[0018] 2. For this key assembly, a fixed shaft is provided, so that all the connecting rod structures are assembled on the fixed shaft and are limited by the fixed shaft, and the situation that the connecting rod structure falls off when the piano drops can be avoided.

[0019] 4. For this key assembly, the fixed shaft includes an elastic inner shaft and metal skins. The metal skins can ensure the anti-bending ability of the fixed shaft and ensure that the fixed shaft is a straight shaft, so as to ensure the strength and stability of the shaft body. The elastic inner shaft can reduce the vibration conduction between the connecting rod structure and the fixed shaft, so as to avoid the situation that when a single key body is pressed, the connecting rod structure on the pressed key body conducts a small amount of vibration to the fixed shaft, and then the fixed shaft conducts the vibration to other connecting rod structures, resulting in noise, that is, further reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is an orthographic projection diagram of the assembly of the connection structure of the utility model;

[0022] Figure 3 This is an exploded view of the connecting rod structure in the riveted state of the utility model;

[0023] Figure 4 The state in which each connecting structure in the first embodiment of the utility model is on a fixed axis;

[0024] Figure 5 This is a schematic diagram of the utility model of an I-shaped metal cylinder assembled in the second injection hole;

[0025] Figure 6 This is an exploded view of the I-shaped metal cylinder assembly and the injection molded part of the utility model;

[0026] Figure 7 For this utility model Figure 1 Rear view of the

[0027] Figure 8 It is a schematic diagram of the positions of the key body assembly ridge and the limit ridge of the utility model;

[0028] Figure 9 This is a bottom view of the utility model;

[0029] Figure 10 For this utility model Figure 9 A magnified image of area A

[0030] Figure 11 This is an assembly diagram of the fixed shaft and connecting rod structure in the second embodiment of the present utility model;

[0031] Figure 12 A perspective view of the fixed axis in the second embodiment of the present utility model

[0032] Figure 13 This is an appearance diagram of the fixed axis in the second embodiment of the present utility model.

[0033] In the figure: 200, key body; 210, pressing end; 220, mounting end; 230, convex frame; 300, connecting rod structure; 310, injection molded part; 311, force-bearing end; 312, force-applying end; 313, limiting protrusion; 314, injection molding hole one; 315, injection molding hole two; 320, metal plate; 321, through hole; 322, limiting hole; 400, fixed axis; 410, metal skin; 420, elastic inner axis; 421, exposed part; 500, bracket; 510, key body assembly ridge; 520, connecting rod assembly ridge; 521, inner cavity; 530, limiting ridge; 600, I-shaped metal cylinder. DETAILED DESCRIPTION

[0034] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Next, according to Figure 1 - Figure 13 describe the key assembly provided by the embodiments of the present invention.

[0036] Embodiment 1:

[0037] Please refer to FIGS. 1 and Figure 2 As shown, the present invention discloses a key assembly, including a key body 200 and a link structure 300 located below the key body 200. Each key body 200 has a link structure 300. When the key body 200 is pressed, the link structure 300 will move in conjunction to strike a sounding element.

[0038] As Figure 2 and Figure 3 shown, the above-mentioned link structure 300 includes an injection molded part 310. The injection molded part 310 has an overall V-shaped trend. One end of the injection molded part 310 is a force receiving end 311, and the force receiving end 311 is used to bear the pressure from the key body 200. The other end of the injection molded part 310 is a force applying end 312, and the force applying end 312 can hammer on the sounding element and reduce the resonance of the link structure 300. The reason why the resonance of the link structure 300 can be reduced here is due to the plastic properties of the injection molded part 310 itself. It is composed of a high molecular polymer, has a low density and high flexibility. Therefore, compared with the metal links in the prior art, its own vibration is small, and the noise reduction effect can be achieved, and there is no need to assemble noise reduction silica gel.

[0039] In addition, since the injection molded part 310 is injection molded by a mold, its accuracy is high and it is superior to use.

[0040] Furthermore, the overall angle of the above-mentioned V-shaped injection molded part 310 is an obtuse angle.

[0041] Preferably, the angle of the V-shaped injection molded part 310 is 140°.

[0042] However, although the above-mentioned injection molded part 310 can achieve the effect of noise reduction, due to its own light weight, it will lead to insufficient hammering force when hammering the sound element, so it is also equipped with a metal plate 320. The metal plate 320 is compounded on both sides of the force-applying end 312, so that the connecting rod structure 300 forms a composite part of plastic and metal. Then, when the force-applying end 312 hammers the sound element, it is actually the metal plate 320 and the force-applying end 312 that hammer the sound element at the same time, thereby increasing the hammering force of the force-applying end 312.

[0043] It should be understood that when the force-applying end 312 hammers the sound-generating element, the metal plate 320 provided here will also produce a certain resonance, but since its metal covering area is smaller than that of the all-metal connecting rod in the prior art, the resonance amount is also extremely small.

[0044] In actual usage scenarios, the height of the upper end surface of the metal plate 320 should be lower than the height of the force-applying end 312, so that the metal plate 320 does not directly contact the sound-generating element when hammering, which can further reduce the resonance of the metal plate 320 and play a role in eliminating noise.

[0045] In summary, the piano key assembly provided by the embodiment of the utility model can reduce the noise caused by the resonance of the connecting rod while ensuring the accuracy of the connecting rod, and ensure the hammering force of the connecting rod, thereby greatly optimizing the accuracy of the piano sound.

[0046] like Figure 1 and Figure 2 In order to enable the connecting rod structure 300 to be linked when the key body 200 is pressed down, a convex frame 230 is provided at the lower part of the key body 200 opposite to the force end 311, and the force end 311 is located in the convex frame 230, so that the convex frame 230 presses down the force end 311 when the key body 200 is pressed down.

[0047] Optionally, the metal plate 320 is connected to the injection molded part 310 by riveting, gluing, clamping, injection encapsulation, embedding molding, hot-melt fixing or elastic clamping.

[0048] For example Figure 3 As shown, the metal plate 320 is connected to the injection molded part 310 in the form of riveting, and an integral limiting protrusion 313 is provided on both sides of the force-applying end 312, and a limiting hole 322 adapted to the limiting protrusion 313 is provided on the metal plate 320, so that the position of the metal plate 320 and the injection molded part 310 is limited, and an injection hole 314 is also reserved in the injection molded part 310, and a through hole 321 is reserved at the corresponding position of the metal plate 320, and rivets are assembled in the injection hole 314 and the through hole 321 to achieve riveting of the metal plate 320 and the injection molded part 310.

[0049] In fact, in the prior art, the connecting rod structure 300 is not integrally installed, but is snap-fitted onto an existing support base, which causes the existing piano to be afraid of being dropped. Once dropped, the connecting rod structure 300 is likely to fall off and be damaged. Therefore, the embodiment of the present utility model also provides a fixed shaft 400. Combining with Figures 2 - 4 As shown, the fixed shaft 400 is an integral metal optical shaft. Injection holes two 315 adapted to the fixed shaft 400 are provided on each injection molded part 310. All the connecting rod structures 300 are assembled on the fixed shaft 400 through the injection holes two 315 and can rotate on the fixed shaft 400. Thus, when a downward force is applied to the force receiving end 311, the entire connecting rod structure 300 can rotate at a certain angle on the fixed shaft 400, so that the force applying end 312 can hammer the sound generating element in a raised state.

[0050] In this implementation scheme, by providing the fixed shaft 400, all the connecting rod structures 300 can be assembled on the fixed shaft 400 and be limited by the fixed shaft 400, so as to avoid the situation that the connecting rod structure 300 falls off when the piano is dropped.

[0051] Preferably, the injection hole two 315 is a cylindrical hole with both ends protruding from the injection molded part 310 to improve the stability of the injection molded part 310 on the fixed shaft 400.

[0052] As Figure 5 and Figure 6 shown, more specifically, in order to reduce the large wear of the injection hole two 315 on the injection molded part 310 by the fixed shaft 400, resulting in the gradual increase of the injection hole two 315, an I-shaped metal cylinder 600 is provided in the injection hole two 315. The contact surface between the injection hole two 315 and the fixed shaft 400 is replaced by the inner surface of the I-shaped metal cylinder 600. The wear resistance of the I-shaped metal cylinder 600 is much higher than that of the injection molded part 310, which is better for use.

[0053] Therefore, the key structure provided by the embodiment of the present utility model can improve the accuracy of the piano sound by reducing the wear of the injection hole two 315.

[0054] In addition, the two ends of the I-shaped metal cylinder 600 are limited at both ends of the injection hole two 315 to prevent the I-shaped metal cylinder 600 from having relative displacement with the injection hole two 315.

[0055] Combining with Figure 2 、 Figure 7 and Figure 8 shown, when in use, one end of the key body 200 close to the force receiving end 311 is the pressing end 210, and one end of the key body 200 close to the force applying end 312 is the installation end 220. The support 500 is located below the connecting rod structure 300. A key body assembly ridge 510 for rotatably assembling the installation end 220 is provided on the support 500. A limiting ridge 530 for limiting the pressing end 210 is also provided on the support 500 to ensure the pressing stability of the key body 200.

[0056] Combined with Figure 9 and Figure 10 As shown, in order to install the fixed shaft 400, a connecting rod assembly ridge 520 is provided in the area of the bracket 500 opposite to the fixed shaft 400. An inner cavity 521 is reserved in the connecting rod assembly ridge 520, and the injection hole two 315 is located in the inner cavity 521; an axial hole is opened along the length direction of the piano on the connecting rod assembly ridge 520, the fixed shaft 400 is sleeved into the axial hole, and both ends of the fixed shaft 400 are fixed to the edge of the bracket 500.

[0057] In this embodiment, the inner cavity 521 can better limit the cylindrical injection hole two 315, and the connecting rod assembly ridge 520 can better limit the fixed shaft 400.

[0058] Embodiment Two:

[0059] Combined with Figures 11 - 13 As shown, the difference between this embodiment and Embodiment One is that the fixed shaft 400 here includes an elastic inner shaft 420 and a metal skin 410. The metal skin 410 is curled circumferentially along the elastic inner shaft 420 outside the circumference of the elastic inner shaft 420. In the fixed shaft 400 with such a structure, the metal skin 410 can ensure the anti-bending ability of the fixed shaft 400, ensure that the fixed shaft 400 is a straight shaft, so as to ensure the strength and stability of the shaft body. On the other hand, it can also reduce the vibration conduction between the connecting rod structure 300 and the fixed shaft 400, so as to avoid the situation of noise caused by the connecting rod structure 300 on the pressed key body 200 conducting a small amount of vibration to the fixed shaft 400 when pressing a single key body 200 and then being conducted by the fixed shaft 400 to other connecting rod structures 300, that is, further reducing noise.

[0060] In addition, it should be noted that the length of the elastic inner shaft 420 can at least accommodate all the injection holes two 315, that is, the length of the elastic inner shaft 420 is the length that can penetrate all the injection holes two 315.

[0061] Preferably, the material of the elastic inner shaft 420 is rubber, that is, the elastic inner shaft 420 is a rubber shaft. And in order to improve the hardness of the rubber shaft, substances such as carbon black, hardening resin, anti-high styrene, and benzoic acid can be added to the raw materials during production to improve the hardness of the rubber column to better support the metal skin 410.

[0062] During assembly, the curled metal skin 410 is supported on the connecting rod assembly ridge 520, which can ensure the stability of the entire fixed shaft 400.

[0063] Optionally, the metal skin 410 is a copper sheet, an iron sheet or a steel sheet.

[0064] Optionally, the thickness of the metal skin 410 is 1 - 2 cm.

[0065] Further, it is preferable to set the metal skin 410 as a split structure. A plurality of metal skins 410 are arranged in a linear matrix on the elastic inner shaft 420, so that the elastic inner shaft 420 forms an exposed part 421 between two adjacent groups of metal skins 410. The exposed part 421 here is not restricted by the metal skin 410, and thus can better absorb vibration and further reduce noise.

[0066] It should be understood that during actual assembly, the injection molded part 310 is located on the metal skin 410, rather than on the exposed part 421.

[0067] It should be noted that in this text, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0068] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piano key assembly, characterized in that: It comprises a connecting rod structure (300), wherein the connecting rod structure (300) comprises an injection molded part (310) and a metal plate (320); in: The injection molded part (310) is V-shaped as a whole, and one end of the injection molded part (310) is a force-bearing end (311), and the other end of the injection molded part (310) is a force-applying end (312), and the force-applying end (312) can hammer on the sound-generating element and reduce the resonance of the connecting rod structure (300); The metal plates (320) are composited on both sides of the force-applying end (312), so that the connecting rod structure (300) forms a composite part of plastic and metal, thereby increasing the hammering force of the force-applying end (312).

2. The piano key assembly according to claim 1, characterized in that: The metal plate (320) is connected to the injection molded part (310) by riveting, gluing, clamping, injection encapsulation, embedding molding, hot-melt fixing, or elastic clamping; It also includes a key body (200) and a fixed axis (400); in: Each of the key bodies (200) has a connecting rod structure (300); Each injection molded part (310) is provided with a second injection molding hole (315), and all connecting rod structures (300) are assembled on the fixed shaft (400) through the second injection molding hole (315) and are capable of rotating on the fixed shaft (400).

3. The piano key assembly according to claim 2, characterized in that: The fixed axis (400) is an integral metal optical axis.

4. The key assembly according to claim 2, characterized in that: The fixed axis (400) comprises: An elastic inner shaft (420), wherein the length of the elastic inner shaft (420) is at least sufficient to accommodate all the second injection holes (315); A metal skin (410) is curled outside the circumference of the elastic inner shaft (420) along the circumference of the elastic inner shaft (420), and the injection molded part (310) is placed on the metal skin (410).

5. The piano key assembly according to claim 4, characterized in that: The metal skins (410) are arranged in a linear matrix on the elastic inner shaft (420), so that the elastic inner shaft (420) forms an exposed portion (421) between two adjacent groups of metal skins (410).

6. The piano key assembly according to any one of claims 2 to 5, characterized in that: An I-shaped metal tube (600) is arranged in the second injection hole (315), and the two ends of the I-shaped metal tube (600) are limited to the two ends of the second injection hole (315).

7. The piano key assembly according to claim 2, characterized in that: An end of the key body (200) close to the force-bearing end (311) is a pressing end (210), and an end of the key body (200) close to the force-applying end (312) is a mounting end (220); The invention also comprises a bracket (500), wherein the bracket (500) is located below the connecting rod structure (300), and a key body assembly ridge (510) is provided on the bracket (500) for rotationally assembling the installation end (220), and a limiting ridge (530) is also provided on the bracket (500) for limiting the position of the pressing end (210).

8. The piano key assembly according to claim 7, characterized in that: A convex frame (230) is provided at a position of the lower part of the key body (200) opposite to the force-bearing end (311), and the force-bearing end (311) is located in the convex frame (230), so that when the key body (200) is pressed downward, the convex frame (230) presses down the force-bearing end (311).

9. The piano key assembly according to claim 8, characterized in that: A connecting rod assembly ridge (520) is provided in an area on the bracket (500) opposite to the fixed axis (400), an inner cavity (521) is reserved in the connecting rod assembly ridge (520), and the second injection hole (315) is located in the inner cavity (521); An axial hole is provided on the connecting rod assembly ridge (520) along the length direction of the piano, and the fixed shaft (400) is inserted into the axial hole; Both ends of the fixed axis (400) are fixed to the edges of the bracket (500).

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