Striking pad

Abstract

The utility model provides a striking pad, which comprises a circuit board and a key assembly laminated with the circuit board, a plurality of contact parts are arranged on the circuit board, and the key assembly comprises a support plate and a plurality of keys arranged on the support plate; each key comprises a key main body and a conductive part arranged on the key main body, and the key main body comprises a key cap arranged on one side, opposite to the circuit board, of the supporting plate and a plurality of supporting parts which are arranged around the conductive part and abut against the circuit board. According to the striking pad provided by the utility model, the key is provided with the plurality of supporting parts which abut against the circuit board, the plurality of supporting parts can enable the conductive part of the key to be separated from the contact part of the circuit board when the key is not knocked, and the plurality of supporting parts can generate deformation when the key is knocked so as to accelerate the contact between the conductive part and the contact part; therefore, the sensitivity of the striking pad is improved.

Description

Technical Field

[0001] The utility model belongs to the field of musical instruments, and more specifically relates to a striking pad. Background Art

[0002] The pad is actually a "MIDI controller". The pad consists of 8x8=64 colorful buttons. With the Ableton Live audio editing software, it can not only be edited and manipulated, but also the timbre and phrase of each button pad can be customized. In Mixer mode, these buttons can be used to control the position of the volume fader, and can also control functions such as sound and image, send, mute, solo, clip stop, and prepare for recording. At the same time, the 8 horizontal and vertical function buttons on the side are also used for performance scenes or customized functions for electronic music. In the early days, these pad buttons were only used for control, but in recent years, with the enrichment of digital musical instruments, people have discovered different ways of playing. Similar to music games, pressing the corresponding buttons will make corresponding sounds and flash different dazzling lights. These ways of playing have further promoted the widespread use of pads. And its experience satisfaction has also become the core competitive factor of digital musical instruments.

[0003] Each key of the pad is a speed or force sensitive feedback button. When the key is struck, the internal structure of the key deforms to change its sensing resistance, and then the striking condition is restored by collecting the resistance change. The accuracy of collecting the key resistance change is closely related to sensitivity. The technical manifestation of poor sensitivity is: the key cannot be triggered when it is lightly tapped, or the trigger is always on and cannot be restored. When the pad has the technical problem of poor sensitivity, it will limit the user's playing style, make musical expression difficult to achieve, and may be perceived by the user as low quality.

[0004] Therefore, in order to achieve user-friendly, more economical and higher-quality products, how to improve the sensitivity of the pad is a technical problem that needs to be solved urgently in the industry. Utility Model Content

[0005] The utility model aims to provide a striking pad to solve the problem that the sensitivity of the existing striking pad needs to be improved.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a striking pad, comprising:

[0007] A circuit board, wherein a plurality of contact portions are provided on the circuit board;

[0008] A key assembly is stacked with the circuit board, and the key assembly includes a support plate and a plurality of keys arranged on the support plate;

[0009] Each of the keys includes a key body and a conductive part arranged on the key body, the conductive part corresponds to the contact part, the key body includes a key cap arranged on the side of the support plate facing away from the circuit board, and a plurality of support parts arranged around the conductive part and abutting against the circuit board, the key cap is used to receive pressing force and transfer the pressing force to the plurality of support parts so that the conductive part contacts the contact part, and the plurality of support parts are used to ensure that there is a gap between the conductive part and the contact part when the key cap is not subjected to pressing force.

[0010] Furthermore, the support plate is provided with a plurality of grooves on one side close to the circuit board, each of the grooves is arranged around the key body and connects the gap between two adjacent support parts, and each of the support parts is provided with an oblique angle or arc angle connected to the conductive part on the side facing away from the groove.

[0011] Furthermore, a plurality of exhaust grooves communicating with the plurality of grooves are formed on a side of the support plate close to the circuit board, and the number of the exhaust grooves is greater than the number of the grooves.

[0012] Furthermore, the number of the plurality of support portions is greater than or equal to three.

[0013] Furthermore, the number of the plurality of support parts is six.

[0014] Furthermore, a gap height between the conductive portion and the contact portion is 0.08 mm.

[0015] Furthermore, the conductive portion is circular in shape, and the contact portion is arranged in the shape of an Archimedean spiral.

[0016] Furthermore, the key body is a silicone key body, and the conductive part is a conductive carbon particle layer integrally formed with the silicone key body.

[0017] Furthermore, the key body also includes an inclined wall for connecting the key cap and the support plate, and the inclined wall is in an arch shape.

[0018] Furthermore, a light emitting element is provided on the circuit board in the contact portion, and a light avoiding hole corresponding to the light emitting element is provided in the conductive portion.

[0019] The beneficial effect of the strike pad provided by the utility model is that: compared with the prior art, the strike pad provided by the utility model is provided with multiple supporting parts abutting against the circuit board through the key, and the multiple supporting parts can separate the conductive part of the key from the contact part of the circuit board when the key is not struck, and the multiple supporting parts can be deformed when the key is struck to accelerate the contact between the conductive part and the contact part, thereby improving the sensitivity of the strike pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the explosion structure of the striking pad provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of a key assembly provided in an embodiment of the utility model;

[0023] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 for Figure 2 Enlarged cross-sectional view at point A;

[0025] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0026] Figure 6 A schematic diagram of the structure of the contact portion provided by an embodiment of the utility model;

[0027] Figure 7 A schematic diagram of the transmission path of the pressing force when a key is struck provided by an embodiment of the utility model;

[0028] Figure 8 A schematic diagram of the relationship between pressing force and contact area when tapping a key provided by an embodiment of the utility model;

[0029] Among them, the main marks of the drawings in the figure are:

[0030] 1. Circuit board; 12. Contact part; 13. Light emitting element;

[0031] 2. button assembly; 21. support plate; 212. groove; 213. exhaust groove;

[0032] 22. button; 220. button body; 221. button cap; 222. supporting part; 2221. bevel; 223. connecting part; 224. inclined wall; 225. conductive part; 2251. light avoidance hole. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Each key of the pad is a speed or force sensitive feedback button. When the key is struck, the internal structure of the key is deformed to change its sensing resistance, and then the resistance change is collected to restore the striking condition. However, the existing key resistance change collection design is not satisfactory. This is due to a variety of reasons, and the technical performance is as follows: 1) Poor force collection accuracy, when the different force changes and the resistance changes are inconsistent (for example, when the force of the strike is increased from 80g to 120g under the external consistent condition, the resistance collection does not change or changes very differently); 2) Small dynamic range, when the signal generated by the key strike only increases in a small range of force (from the minimum to the maximum); 3) Poor consistency, when different keys require different forces to trigger, for example, one key requires 80g to trigger, and another key requires 120g to trigger; 4) Poor sensitivity, when the key cannot be triggered when it is lightly struck, or the trigger is always on and cannot be restored. These unsatisfactory technical problems may limit the user's playing style, make musical expression difficult to achieve, and may also be perceived by users as low quality.

[0035] In order to achieve user-friendly, more economical and higher-quality products, the utility model provides a striking pad to solve these technical problems.

[0036] See also Figure 1 The striking pad provided in this embodiment includes a circuit board 1 and a key assembly 2. The striking pad also includes a shell (not shown in the figure), the shell has a receiving space, and the circuit board 1 and the key assembly 2 are placed in the receiving space.

[0037] like Figure 1 , Figure 2 As shown, the key assembly 2 includes a support plate 21 and a plurality of keys 22 arranged on the support plate 21 .

[0038] This embodiment does not limit the specific number and layout of the keys 22. Preferably, the plurality of keys 22 are arranged in an array, with eight keys 22 in each row and eight keys 22 in each column, that is, the number of keys 22 is sixty-four.

[0039] like Figure 3 , Figure 4 , Figure 5As shown, each key 22 includes a key body 220 and a conductive part 225, the conductive part 225 is arranged on the key body 220, and the conductive part 225 is provided with a light avoidance hole 2251. The key body 220 includes a key cap 221, a support part 222, a connecting part 223 for connecting the key cap 221 and the support part 222, and an inclined wall 224 for connecting the key cap 221 and the support plate 21. The key cap 221 and the inclined wall 224 are both arranged on the side of the support plate 21 facing away from the circuit board 1, and the connecting part 223 and the support part 222 are both arranged on the side of the support plate 21 close to the circuit board 1.

[0040] It should be noted that, in the present embodiment, the key 22 is divided into a key body 220 consisting of a key cap 221, an inclined wall 224, a connecting portion 223 and a supporting portion 222, and a conductive portion 225 in order to clearly illustrate the overall structure of the key 22, but it does not limit the key 22 to be disassembled into independently arranged key caps 221, inclined walls 224, connecting portions 223, supporting portions 222 and conductive portions 225.

[0041] In this embodiment, the materials of the key cap 221, the inclined wall 224, the connecting part 223 and the supporting part 222 are all silicone, and the key cap 221, the inclined wall 224, the connecting part 223 and the supporting part 222 are integrally formed to form the silicone key body 220. The material of the conductive part 225 is carbon particles, that is, the conductive part 225 is a conductive carbon particle layer, and the conductive carbon particle layer is integrated with the silicone key body 220 by hot pressing. At this time, the entire key 22 is an integrated structure and cannot be further disassembled. Since the technical consistency is directly related to the stability and consistency of the manufacturing production process, this embodiment improves the reliability of consistency by integrating the conductive carbon particle layer with the silicone key body 220.

[0042] In this embodiment, the shape of the button cap 221 can be round or square. Figure 1 As shown, the key cap 221 is in a square shape.

[0043] In this embodiment, preferably, Figure 4As shown, the shape of the inclined wall 224 adopts an L-arch shape, which has a small pressing force, a long service life, and a rebound force, which is better adapted to the industry's high sensitivity requirements for the striking pad. It should be noted that the shape of the inclined wall 224 is usually a conical, arched and flat shape. If a conical inclined wall 224 is adopted, the P (press) / S (stroke) curve is straight, the pressing feel rhythm is obvious, and it is suitable for a key 22 with a higher pressing force. If an arched inclined wall 224 is adopted, the pressing force is small, the service life is long, there is no pressing feel rhythm and the elastic force is large, which is suitable for products with low pressing force and long stroke. If a flat inclined wall 224 is adopted, P (press) / S (stroke) is a linear curve, which does not rebound and has no pressing feel. Of course, the inclined wall 224 of this embodiment also adopts a fusion of any two or three of the conical, arched and flat shapes. It should be understood that the shape of the inclined wall 224 can be flexibly designed according to actual needs.

[0044] In this embodiment, if Figure 3 As shown, the end faces of the conductive portion 225 and the connecting portion 223 are both circular. The conductive portion 225 is concentrically arranged with the connecting portion 223, the diameter of the connecting portion 223 is larger than the diameter of the conductive portion 225, and the axial length of the connecting portion 223 is smaller than the axial length of the conductive portion 225. At this time, the connecting portion 223 cooperates with the conductive portion 225 to form a step surface, and a plurality of supporting portions 222 are arranged at intervals on the aforementioned step surface. In this embodiment, a plurality of supporting portions 222 are arranged so that when the key 22 is not struck, the conductive portion 225 of the key 22 is spaced apart from the contact portion 12 of the circuit board 1, and when the key 22 is struck, it is deformed to accelerate the contact between the conductive portion 225 and the contact portion 12, thereby improving the sensitivity.

[0045] In this embodiment, the number of the support portions 222 can be flexibly set according to the force deformation condition of the key 22. Preferably, the number of the support portions 222 is greater than or equal to three. In one example, the number of the support portions 222 is set to three, and the three support portions 222 are evenly arranged around the conductive portion 225, that is, the angle between two adjacent support portions 222 is 120 degrees. In another example, the number of the support portions 222 is set to six, and the six support portions 222 are evenly arranged around the conductive portion 225, that is, the angle between two adjacent support portions 222 is 60 degrees.

[0046] In this embodiment, the support portion 222 is provided with an oblique angle or a rounded angle at the connection between the support portion 222 and the conductive portion 225. Figure 5 As shown, the support portion 222 is provided with an angled angle 2221 connected to the conductive portion 225. This embodiment does not limit the angle of the angled angle 2221, and can be flexibly designed according to actual needs. This embodiment effectively ensures that the pressing force and stroke of the key 22 are in a linear relationship by providing an angled angle or arc angle on the support portion 222, while increasing the deformation stroke of the key 22, so that more pressing force is released around the striking contact surface.

[0047] like Figure 1 , Figure 6 As shown, a plurality of contact portions 12 are provided on the circuit board 1. The contact portion 12 includes a positive grid and a negative grid. Since the positive grid and the negative grid are not connected together, the switch circuit of the striking pad is disconnected. In order to close the circuit, the conductive portion 225 of the button 22 can be pressed to contact the contact portion 12 of the circuit board 1, thereby realizing electrical connection between the positive grid and the negative grid.

[0048] In this embodiment, the contact portion 12 is shaped as an Archimedean spiral, that is, the contact portion 12 includes a positive grid in the shape of an Archimedean spiral and a negative grid in the shape of an Archimedean spiral, and the two are concentrically arranged. Figure 7 , Figure 8 , Figure 8 It reflects the relationship between the pressing force and the contact area of ​​the key 22. When the pad is under the action of external force (constant unit area), the contact area will increase with the greater the pressing force. It can also be obtained that the area surges only in a certain interval, and the later pressing force has a relatively small impact on the area, and this linear surge interval is the key acquisition area. In order to improve the acquisition dynamic range, this embodiment increases the number of positive and negative grids on the circuit board. For this purpose, the contact portion 12 is set to be in the shape of an Archimedean spiral, and the number of circles is slightly increased. The dynamic range can also be better optimized in combination with the carbon particle resistance of the conductive portion 225 and the software algorithm. At the same time, see Figure 7 When the key 22 is struck, the transmission path of the pressing force is like throwing a small head into the water, which will generate circles of water ripples spreading outward. In this embodiment, the contact portion 12 is arranged in the shape of an Archimedean spiral, which is also conducive to improving the accuracy of force collection.

[0049] In this embodiment, the circuit board 1 is provided with a plurality of grooves 212 and a plurality of exhaust grooves 213, and the number of the exhaust grooves 213 is greater than the number of the grooves 212. Figure 2 , Figure 3 As shown, exhaust grooves 213 are provided around each groove 212 on the circuit board 1. It is understandable that when the key 22 is struck, the conductive portion 225 on the key body 220 is deformed so that it moves toward the contact portion 12 of the circuit board 1, and the air inside the synchronous key 22 is discharged through the groove 212 and the exhaust groove 213. When the key 22 is released, the key body 220 returns to the state before deformation, and the external air flows back into the key 22 through the exhaust groove 213 and the groove 212, thereby improving the reliability of the key 22.

[0050] In this embodiment, if Figure 6As shown, a light emitting element 13 is provided in the contact portion 12 on the circuit board 1 for emitting light of a specific color. The color of the light emitting element 13 can be any one of a red light emitting element, a green light emitting element and a blue light emitting element. At the same time, the type of the light emitting element 13 can be an LED lamp. It can be understood that when different keys 22 are struck, not only corresponding sounds can be emitted, but also dazzling lights can be flashed.

[0051] For a better understanding, let's combine Figures 1 to 6 The preferred striking pad of this embodiment is further described as follows:

[0052] like Figure 1 As shown, the striking pad includes a circuit board 1 and a key assembly 2 which are stacked.

[0053] like Figure 6 As shown, a plurality of contact portions 12 are provided at intervals on the circuit board 1, and each contact portion 12 is shaped like an Archimedean spiral. A light emitting element 13 is provided inside each contact portion 12 on the circuit board 1, and the light emitting element 13 is an LED lamp.

[0054] like Figure 1 , Figure 2 , Figure 3 As shown, the key assembly 2 includes a support plate 21 and a plurality of keys 22 disposed on the support plate 21. A plurality of grooves 212 and a plurality of exhaust grooves 213 communicating with the plurality of grooves 212 are provided on the side of the support plate 21 close to the circuit board 1. The grooves 212 are square in shape. Exhaust grooves 213 are provided around each groove 212 on the support plate 21, and two adjacent grooves 212 are communicated with the same exhaust groove 213.

[0055] like Figure 3 , Figure 4 , Figure 5As shown, each key 22 includes a key body 220 and a conductive part 225 disposed on the key body 220, and a light avoidance hole 2251 is disposed on the conductive part 225. Even, a light avoidance groove corresponding to the light avoidance hole 2251 is also disposed on the key body 220 to adapt to a light emitting element 13 of a larger height. The key body 220 is made of silica gel, and the conductive part 225 is made of carbon particles, and the conductive part 225 is integrally formed on the key body 220 by hot pressing of a mold. The key body 220 includes an integrally arranged key cap 221, an inclined wall 224, a connecting part 223 and six supporting parts 222, the key cap 221 and the inclined wall 224 are disposed on the side of the support plate 21 facing away from the circuit board 1, the inclined wall 224 connects the key cap 221 and the support plate 21, the connecting part 223 and the six supporting parts 222 are disposed on the side of the support plate 21 close to the circuit board 1, and the connecting part 223 connects the key cap 221 and the conductive part 225. The key cap 221 is square, the inclined wall 224 is arched, the connecting portion 223 and the conductive portion 225 are circular, and since the height of the connecting portion 223 is less than the height of the conductive portion 225, and the diameter of the connecting portion 223 is greater than the diameter of the conductive portion 225, the connecting portion 223 cooperates with the conductive portion 225 to form a step surface, and six support portions 222 are arranged at intervals on the step surface. The six support portions 222 are all in contact with the circuit board 1, and the gap height between the conductive portion 225 and the contact portion 12 is 0.08 mm. Each support portion 222 is provided with an oblique angle 2221 connected to the conductive portion 225 on one side away from the groove 212.

[0056] The working principle of the striking pad is as follows: when the striking pad is in a stationary state (i.e., idle), since each key 22 is provided with six supporting parts 222 abutting against the circuit board 1, the conductive part 225 of each key 22 is spaced apart from the contact part 12 of the circuit board 1. When the performer strikes the key 22, the key body 220 is deformed so that the conductive part 225 contacts the contact part 12, thereby emitting sound and light. At this stage, since the inclined wall 224 of the key body 220 is arched and the six supporting parts 222 are provided with bevels 2221, the pressing force is mainly concentrated inside the striking contact surface, while more pressing force is released around the striking contact surface, and the gas inside the synchronous key 22 is discharged through the gap between adjacent supporting parts 222, the groove 212 and the exhaust groove 213 in turn. When the performer releases the key 22, the key body 220 returns to its shape before deformation. At this stage, the inclined wall 224 and the six supporting parts 222 of the key body 220 quickly return to their initial state, and the external air is simultaneously sucked back into the key 22 through the exhaust groove 213, the groove 212 and the gap between the adjacent supporting parts 222.

[0057] In the preferred striking pad of this embodiment, the carbon film cost of an 8*8 MIDI striking pad is 25 RMB. By integrating the silicone key body with the conductive carbon particle layer, the cost can be directly saved by 15 RMB. At the same time, the back-end incoming material quality inspection and production assembly can also reduce the operation process of related personnel, and one product can indirectly save 1-2 RMB, which significantly reduces costs and increases efficiency. At the same time, because the striking pad product is integrally formed, it has good stability and consistency, and the manufacturing yield is higher, reaching 97%.

[0058] In the preferred striking pad of this embodiment, by setting the inclined wall of the key body in an L-shaped arch and six oblique supporting parts, on the one hand, sufficient structural deformation space of the striking pad is effectively guaranteed to prevent the gap between the conductive part of the key and the contact part of the circuit part from being too high, which may cause difficulty in triggering, and too low, which may cause constant triggering; on the other hand, the striking pad key exhaust is effectively guaranteed to prevent the failure to discharge / absorb gas in time during striking, which will directly affect the striking force / key recovery, and indirectly cause the distortion of data collection accuracy and make the user perceive it as low quality. The sensitivity is better, and the trigger condition can be reached at 60-90g.

[0059] In the preferred striking pad of this embodiment, the conductive portion of the button is arranged in a circular shape and the contact portion of the circuit board is arranged using an Archimedean spiral, thereby improving the acquisition dynamic range and the accuracy of the force acquisition.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A striking pad, characterized in that: include: A circuit board, wherein a plurality of contact portions are provided on the circuit board; A key assembly is stacked with the circuit board, and the key assembly includes a support plate and a plurality of keys arranged on the support plate; Each of the keys includes a key body and a conductive part arranged on the key body, the conductive part corresponds to the contact part, the key body includes a key cap arranged on the side of the support plate facing away from the circuit board, and a plurality of support parts arranged around the conductive part and abutting against the circuit board, the key cap is used to receive pressing force and transfer the pressing force to the plurality of support parts so that the conductive part contacts the contact part, and the plurality of support parts are used to ensure that there is a gap between the conductive part and the contact part when the key cap is not subjected to pressing force.

2. The striking pad according to claim 1, wherein: The support plate is provided with a plurality of grooves on one side close to the circuit board, each of the grooves is arranged around the key body and connects the gap between two adjacent support parts, and each support part is provided with an oblique angle or arc angle connected to the conductive part on the side facing away from the groove.

3. The striking pad according to claim 2, wherein: A plurality of exhaust grooves communicating with the plurality of grooves are formed on one side of the support plate close to the circuit board, and the number of the exhaust grooves is greater than the number of the grooves.

4. The striking pad according to claim 1, wherein: The number of the plurality of support parts is greater than or equal to three.

5. The striking pad according to claim 4, characterized in that: The number of the plurality of support portions is six.

6. The striking pad according to claim 1, wherein: The gap height between the conductive portion and the contact portion is 0.08 mm.

7. The striking pad according to claim 1, wherein: The conductive portion is circular in shape, and the contact portion is arranged in the shape of an Archimedean spiral.

8. The striking pad according to claim 1, wherein: The key body is a silicone key body, and the conductive part is a conductive carbon particle layer integrally formed with the silicone key body.

9. The striking pad according to claim 1, wherein: The key body further comprises an inclined wall for connecting the key cap and the support plate, and the inclined wall is in an arch shape.

10. The striking pad according to claim 1, wherein: A light emitting element is arranged inside the contact portion on the circuit board, and a light avoiding hole corresponding to the light emitting element is opened in the conductive portion.

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