Supporting film for piano keys

Abstract

A supporting film for piano keys has a mounting platform, a first supporting wall arranged around and protruding from the mounting platform and forming a buffer space inside, and a second supporting wall arranged around and protruding from the first supporting wall; the upper portion of the second supporting wall forms a pressing surface, and the pressing surface is concavely arranged towards the mounting platform and has a plurality of abutting portions; the abutting portions are connected to each other inside the second supporting wall and extend into the buffer space; the bottom portion of each connecting wall forms a first recess portion extending towards the pressing surface and spacing the abutting portions; the length of the abutting portions is increased by the recess portions, which increases the service life of the supporting film and improves the pressing feeling.

Description

Technical Field

[0001] This utility model relates to a support film, and more particularly to a support film for piano keys that is installed below a piano key and provides an elastic restoring force after the piano key is pressed. Background Technology

[0002] In traditional electronic pianos, in addition to a spring behind the key for return during pressing, a support membrane is also provided below the key to support it and provide an elastic return force, thereby improving the feel of the key when playing.

[0003] Traditional support film A, such as Figure 1 As shown, it has a plurality of abutment parts B of different heights inside. Each abutment part B has the same design, consisting of a curved section C and a flat section D. When the supporting film A is pressed by the piano key, it will sequentially drive each abutment part B to move downward. The volume is determined by the contact area and time between each abutment part B and a circuit board (known technology, not described in detail here) located below the piano key. The larger the contact area and the longer the contact time between each abutment part B and the circuit board, the greater the pressing force. At this time, the sound produced by the piano will change with the size of the pressing area and the time.

[0004] Since each of the abutment portions B in the traditional support film A has the same design, when each abutment portion B gradually comes into contact with the circuit board by pressing, it will cause each abutment portion B to deform in the curved section C, and cause each curved section C to accumulate an elastic restoring force.

[0005] Furthermore, in the conventional support film A, because the length of the curved segment C on each abutment part B is insufficient, the elastic restoring force generated during pressing accumulates on the curved segment C. Since the length of the curved segment C is insufficient, the deformation length of the curved segment C is insufficient, which makes the pressing sensation more pronounced. The greater the sensation of the pressing sensation, the greater the pressing noise. At the same time, when all the elastic restoring force is accumulated on the curved segment C, the insufficient deformation length will also shorten the life of the support film.

[0006] Therefore, it is necessary to develop a support film that can effectively increase service life and improve the pressing feel, while also reducing noise. Utility Model Content

[0007] The main objective of this invention is to provide a support film, specifically a support film for piano keys that is installed below a piano key and provides an elastic restoring force after the piano key is pressed.

[0008] To achieve the above objectives, the present invention provides a support film for supporting a piano film. The support film includes a mounting platform, a first support wall, and a second support wall. The mounting platform is used to mount the support film below the piano keys. The first support wall is circumferentially arranged and protrudes from the mounting platform, forming a buffer space within the first support wall. The second support wall is circumferentially arranged and protrudes from the first support wall. A pressing surface for contacting the piano keys is formed on the upper part of the second support wall, and a plurality of abutment portions are recessed from the pressing surface toward the mounting platform. Each abutment portion is interconnected on the inner side of the second support wall and extends into the buffer space. Adjacent abutment portions are interconnected by a connecting wall. Each connecting wall and the top of the second support wall constitute the pressing surface, and the bottom of each connecting wall has a first recess extending toward the pressing surface, thereby separating the abutment portions.

[0009] In one embodiment, each of the abutting portions includes a first abutting portion connected to one side of the second support wall, a second abutting portion extending from the first abutting portion, and a third abutting portion extending from the second abutting portion and connected to the other side of the second support wall.

[0010] In one embodiment, the first abutting portion, the second abutting portion, and the third abutting portion form a gap in the buffer space.

[0011] In one embodiment, the first abutting portion and the second abutting portion are connected by a connecting wall, and a first recess is formed between the first abutting portion and the second abutting portion. The second abutting portion and the third abutting portion are connected by another connecting wall, and another first recess is formed between the second abutting portion and the third abutting portion.

[0012] In one embodiment, the first abutment portion comprises a first curved segment connecting one side of the second support wall and one of the connecting walls and extending toward the buffer space, a first vertical segment extending from the first curved segment toward the buffer space, and a first planar segment connected to the lower end of the first vertical segment.

[0013] In one embodiment, the second abutment portion comprises an arcuate segment connecting the two connecting walls and extending toward the buffer space, a second curved segment extending from the arcuate segment and toward the buffer space, a second vertical segment extending from the second curved segment toward the buffer space, and a second planar portion connected to the lower end of the second vertical segment.

[0014] In one embodiment, the third abutment portion comprises a third curved section connected to the other side of the second support wall and interconnected with another connecting wall, a third vertical section extending from the third curved section toward the buffer space, and a third planar section connected to the lower end of the third vertical section.

[0015] In one embodiment, an extension section is further formed between the first support wall and the second support wall. The extension section is arc-shaped and surrounds between the first support wall and the second support wall.

[0016] In one embodiment, a second recess is formed between the extended section and each of the adjacent abutting portions, the second recess extending from the bottom of the second support wall toward the pressing surface.

[0017] Compared with the prior art, the present invention has the following advantages: by setting the recessed portions, the present invention can effectively increase the length of the abutment portions, the extension sections and the first support wall, thereby increasing the actuation stroke of the support film. In addition to increasing the service life of the support film, it can also reduce the abrupt stops generated when pressing, thus improving the pressing feel of the piano keys and reducing the noise generated when pressing the piano keys. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of an existing support film.

[0019] Figure 2 This is a three-dimensional schematic diagram of the first embodiment of the present utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the first embodiment of the present utility model.

[0021] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0022] Figure 5 This is a cross-sectional schematic diagram of the second embodiment of the present utility model.

[0023] Figure 6 This is a three-dimensional schematic diagram of the third embodiment of the present utility model.

[0024] Explanation of markings in the diagram: Existing technology: A: Supporting film; B: Supporting section; C: Curved surface segment; D: Planar segment; This utility model: 10: Supporting film; 20: Install the platform; 30: First supporting wall; 31: Buffer space; 40: Second supporting wall; 41: Pressing surface; 42: Connecting wall; 43: First recessed portion; 44: Second recessed portion; 50: Reliance Department; 51: First anchorage; 511: First curved surface segment; 512: First vertical segment; 513: First planar segment; 52: Second anchorage; 521: Circular arc section; 522: Second curved surface segment; 523: Second vertical segment; 524: Second plane segment; 53: Third Reservoir; 531: Third surface segment; 532: Third vertical segment; 533: Third plane segment; 60: Extended section. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0026] like Figures 2 to 4 As shown, this utility model provides a supporting film for mounting below a piano key (a prior art, not shown here) and fixing it to a flat surface, providing the piano key with an elastic return force after being pressed. The supporting film 10 has a mounting platform 20, a first supporting wall 30, and a second supporting wall 40.

[0027] The mounting platform 20 is a flat surface, and a plurality of positioning posts 21 are provided below the mounting platform 20 to allow the support film 10 to be positioned below the piano keys.

[0028] The first support wall 30 is provided above the mounting platform 20, protruding and surrounding the mounting platform 20, so that the interior of the first support wall 30 forms a hollow buffer space 31, and the buffer space 31 penetrates the mounting platform 20.

[0029] The second support wall 40 protrudes above the first support wall 30 and surrounds the first support wall 30. A pressing surface 41, which can contact the piano keys, is formed on the upper part of the second support wall 40. Furthermore, the second support wall 40 has a plurality of abutment portions 50 recessed from the pressing surface 41 toward the mounting platform 20. Each abutment portion 50 is interconnected on the inner side of the second support wall 40 and extends into the buffer space 31. Adjacent abutment portions 50 are interconnected by a connecting wall 42. Each connecting wall 42 and the top of the second support wall 40 form the pressing surface 41. The bottom of each connecting wall 42 has a first recess 43 extending toward the pressing surface 41, which spacees the abutment portions.

[0030] In this embodiment, each of the abutment portions 50 includes a first abutment portion 51, a second abutment portion 52, and a third abutment portion 53. The first abutment portion 51 is connected to one side of the second support wall 40. The second abutment portion 52 extends from one side of the first abutment portion 51, and the third abutment portion 53 extends from the second abutment portion 52 and connects to the other side of the second support wall 40, such that a first recess 43 is disposed between the first abutment portion 51, the second abutment portion 52, and the third abutment portion 53. In other words, the first abutment portion 51 and the second abutment portion 52 are connected by a connecting wall 42, and a first recess 43 is formed between the first abutment portion 51 and the second abutment portion 52; the second abutment portion 52 and the third abutment portion 53 are connected by another connecting wall 42, and another first recess 43 is formed between the second abutment portion 52 and the third abutment portion 53. Meanwhile, the first abutment 51, the second abutment 52 and the third abutment 53 form a gap in the buffer space 31.

[0031] The first abutment portion 51 is composed of a first curved section 511, a first vertical section 512, and a first planar section 513. The first curved section 511 is connected between one side of the second support wall 40 and a connecting wall 42 therein and extends toward the buffer space 31; the first vertical section 512 is formed by extending from the first curved section 511 toward the buffer space 31; and the first planar section 513 is connected to the lower end of the first vertical section 512.

[0032] The second abutment portion 52 is composed of an arc segment 521, a second curved surface segment 522, a second vertical segment 523, and a second planar segment 524. The arc segment 521 connects the two connecting walls 42 and extends toward the buffer space 31; the second curved surface segment 522 extends from the arc segment 521 toward the buffer space 31; the second vertical segment 523 extends from the second curved surface segment 522 toward the buffer space 31; and the second planar segment 524 is connected to the lower end of the second vertical segment 523. Thus, the first recess 43, located between the first abutment portion 51 and the second abutment portion 52, is formed between the first curved surface segment 511 and the arc segment 521.

[0033] The third abutment portion 53 is composed of a third curved section 531, a third vertical section 532, and a third planar section 533. The third curved section 531 is connected to the other side of the second support wall 40 and is interconnected with the other connecting wall 42; the third vertical section 532 extends from the third curved section 531 toward the buffer space 31; and the third planar section 533 is connected to the lower end of the third vertical section 532. Thus, the first recess 43, located between the second abutment portion 52 and the third abutment portion 53, is formed between the arc section 521 and the third curved section 531.

[0034] When the supporting film 10 of this utility model is activated, it mainly works by pressing a piano key. The bottom of the key contacts the pressing surface 41, causing the pressing surface 41 to be pulled downwards by the key. This pulls the second supporting wall 40 towards the first supporting wall 30. At this moment, the first supporting wall 30 deforms due to the movement of the second supporting wall 40, causing the third abutment 53, the second abutment 52, and the first abutment 51 to sequentially contact the circuit board. The third abutment 53 then gradually... The third curved surface segment 531 gradually deforms, and the second abutment 52 deforms on the arc segment 521 and the second curved surface segment 522. The first abutment 51 deforms on the first curved surface segment 511. An elastic restoring force is accumulated on the third curved surface segment 531, the arc segment 521, the second curved surface segment 522, the first curved surface segment 511, and the first support wall 30. When the piano key is released, the support film 10 releases the elastic restoring force, thereby driving the piano key to return to its original position.

[0035] It is worth mentioning that, in this embodiment, the first recess 43 is mainly used to increase the operating length of each of the abutment portions 50. The deeper the first recess 43, the longer the operating length of each of the abutment portions 50. The operating length of the first abutment portion 51 includes the distance from the first curved surface segment 511 to the first vertical segment 512. The operating length of the second abutment portion 52 includes the distance from the arc segment 521 and the second curved surface segment 522 to the second vertical segment 523. The operating length of the third abutment portion 53 includes the distance from the third curved surface segment 531 to the third vertical segment 532. Therefore, the deeper the first recess 43, the longer the lengths of the first curved surface segment 511, the arc segment 521, and the third curved surface segment 531 become. This allows the actuation length of each of the abutment portions 50 to be increased through the setting of the first recess 43. This effectively increases the area of ​​the elastic restoring force accumulated by the support film 10 in each of the abutment portions 50, thereby significantly improving the service life of the support film 10. Furthermore, the setting of the first recess 43 effectively reduces the abruptness generated by the piano keys during pressing, making the pressing force smoother. In addition to improving the pressing feel of the piano keys, it also makes the release of the elastic restoring force more gradual, thereby reducing the noise generated when the piano keys are pressed.

[0036] For example Figure 5 As shown, in this embodiment, an extension section 60 is further provided between the first support wall 30 and the second support wall 40. The extension section 60 is arc-shaped and surrounds the first support wall 30 and the second support wall 40. Furthermore, a second recess 44 is formed between the extension section 60 and each of the adjacent abutment portions 50. The second recess 44 extends from the bottom of the second support wall 40 toward the pressing surface 41. Therefore, in this embodiment, a second recess 44 is provided between the extension section 60 and the first abutment portion 51 and the third abutment portion 53, respectively. This allows the length of the extension section 60, the first curved section 511, and the third curved section 531 to be increased by changing the depth of the second recess 44, thereby further increasing the service life of the support film 10, improving the pressing feel, and reducing noise.

[0037] Finally, as Figure 6 As shown, in this embodiment, multiple sets of the first support wall 30 and the second support wall 40 are provided on the mounting platform 20. This not only improves production efficiency but also allows users to cut the required number of support films 10 themselves, thereby making it more convenient to assemble the support films 10.

[0038] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model, or reasonable combinations of features and solutions from various embodiments, are all within the protection scope of the present utility model.

Claims

1. A support film for piano keys, used to support a piano key, characterized in that, The supporting film has: An installation platform for mounting the support film below the piano keys; A first support wall is arranged around and protrudes from the mounting platform, so that a buffer space is formed inside the first support wall; as well as A second support wall is circumferentially arranged and protrudes from the first support wall. A pressing surface for contacting the piano keys is formed on the upper part of the second support wall, and a plurality of abutment portions are recessed from the pressing surface toward the mounting platform. Each abutment portion is interconnected on the inner side of the second support wall and extends into the buffer space. Each adjacent abutment portion is interconnected by a connecting wall. Each connecting wall and the top of the second support wall form the pressing surface, and the bottom of each connecting wall is formed with a first recess extending toward the pressing surface to space the abutment portions apart.

2. The support film for piano keys as described in claim 1, characterized in that, Each of the aforementioned abutting portions includes a first abutting portion connected to one side of the second support wall, a second abutting portion extending from the first abutting portion, and a third abutting portion extending from the second abutting portion and connected to the other side of the second support wall.

3. The support film for piano keys as described in claim 2, characterized in that, The first abutting part, the second abutting part, and the third abutting part form a gap in the buffer space.

4. The support film for piano keys as described in claim 2, characterized in that, The first abutting part and the second abutting part are connected by a connecting wall, and a first recess is formed between the first abutting part and the second abutting part. The second abutting part and the third abutting part are connected by another connecting wall, and another first recess is formed between the second abutting part and the third abutting part.

5. The support film for piano keys as described in claim 4, characterized in that, The first abutment portion consists of a first curved segment connecting one side of the second support wall and one of the connecting walls and extending toward the buffer space, a first vertical segment extending from the first curved segment toward the buffer space, and a first planar segment connected to the lower end of the first vertical segment.

6. The support film for piano keys as described in claim 4, characterized in that, The second abutment portion consists of an arcuate section connecting the two connecting walls and extending toward the buffer space, a second curved section extending from the arcuate section and toward the buffer space, a second vertical section extending from the second curved section toward the buffer space, and a second flat portion connected to the lower end of the second vertical section.

7. The support film for piano keys as described in claim 4, characterized in that, The third abutment portion consists of a third curved section connected to the other side of the second support wall and interconnected with the other connecting wall, a third vertical section extending from the third curved section toward the buffer space, and a third planar section connected to the lower end of the third vertical section.

8. The support film for piano keys as described in claim 1, characterized in that, An extension section is further formed between the first support wall and the second support wall. The extension section is arc-shaped and surrounds the first support wall and the second support wall.

9. The support film for piano keys as described in claim 8, characterized in that, A second recess is formed between the extended section and each of the adjacent abutting portions, the second recess extending from the bottom of the second support wall toward the pressing surface.

Images