Chord plate convenient for practicing playing
By designing a chord plate that is easy to practice playing, the problem of complex memory difficulties in chord diagrams and difficult to master the relationship between series is solved, and the effect of beginners mastering chords and series is achieved faster and less out-of-tune effects.
Patent Information
- Application Number
- CN202421318428.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
In the prior art, chord diagrams are complicated and difficult to remember, inconvenient to carry, and difficult to master the series relationship, which leads to beginners being prone to off-tuning when practicing guitar and inconvenient to practice.
A chord disc is designed to facilitate practice playing, including chord content discs and chord series discs. One side of the chord content disk has multiple chord diagrams, arranged in concentric circles; the chord series disc is rotatably superimposed on the chord content disk, and a concentric ring area and a display window are set on the back. Seven series are marked through seven display windows, so that the travel pattern corresponding to the series is clear.
Through the design of the chord plate, beginners can more easily master the commonly used seven chords and their series, reducing the possibility of off-tuning, and making the practice process easier and more convenient.
Smart Images
Figure CN222672471U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of musical instrument supplies, in particular to a chord plate which is convenient for practicing playing. Background Art
[0002] A chord is a group of sounds with a certain interval relationship, that is, three or more notes are combined vertically in a third or non-third overlapping relationship, which is called a chord. Third-degree chords usually include triads (three-note chords), seventh chords (four-note chords), ninth chords (five notes), eleventh chords (six notes), and thirteenth chords (seven notes). Non-third-degree chords usually include suspended chords and power chords (i.e., pentachords). There are roughly 72 chords commonly used in twelve keys, and roughly seven chords commonly used in each key. Chords can generally be played on the guitar by strumming or breaking up the chords, and there are multiple ways to press a chord. In terms of timbre, chords can give people a beautiful enjoyment, fuller and more mellow.
[0003] However, since practicing chords on the guitar often requires chord exercises within the key and key changes to practice the seven commonly used chords in each key and the corresponding series, it is easy for beginners to confuse the progression rules corresponding to the chords and series, resulting in out-of-tune. The chord diagram is complicated and difficult to remember, inconvenient to carry, the practice process is cumbersome and difficult, it is easy to go out of tune, and practice is inconvenient. Utility Model Content
[0004] The utility model aims to provide a chord disc which is convenient for practicing playing, aiming to solve the technical problems in the prior art that the chord diagrams are complicated and difficult to remember, inconvenient to carry and the relationship between the progressions is difficult to grasp.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a chord plate that is convenient for practicing playing, comprising:
[0006] A chord content disk, at least one side of which has a plurality of different chord diagrams, wherein the plurality of chord diagrams are regularly arranged to form a plurality of concentric circles surrounding a center; and
[0007] A chord progression disk, the chord progression disk is rotatably stacked on the chord content disk, and a plurality of concentric ring areas are provided on a side of the chord progression disk away from the chord content disk, and at least seven display windows are opened in the plurality of concentric ring areas according to a predetermined rule, wherein the seven display windows are marked with corresponding progressions in a clockwise or counterclockwise direction, so that the plurality of chord diagrams are displayed through seven of the display windows to reveal the corresponding seven chord diagrams, thereby presenting a progression rule corresponding to the chords and progressions.
[0008] Furthermore, the plurality of chord diagrams are regularly arranged to form three concentric circles, and three of the plurality of concentric ring areas are correspondingly provided.
[0009] Furthermore, the three concentric circles are arranged in sequence from the inner ring to the outer ring as a first concentric circle distribution, a second concentric circle distribution and a third concentric circle distribution;
[0010] The chord diagram of the first concentric circle distribution is A7, #A7, B7, C7, #C7, D7, #D7, E7, F7, #F7, G7, #G7 in clockwise order;
[0011] The chord diagram of the second concentric circle distribution is Am7, #Am7, Bm7, Cm7, #Cm7, Dm7, #Dm7, Em7, Fm7, #Fm7, Gm7, #Gm7 in clockwise order;
[0012] The chord diagram of the third concentric circle distribution is Amaj7, #Amaj7, Bmaj7, Cmaj7, #Cmaj7, Dmaj7, #Dmaj7, Emaj7, Fmaj7, #Fmaj7, Gmaj7, and #Gmaj7 in clockwise order.
[0013] Furthermore, the seven display windows are correspondingly marked with seven different levels, which are Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ, and Ⅶ in clockwise order.
[0014] Furthermore, the display window corresponding to level I is provided with a selection start mark.
[0015] Furthermore, the three concentric ring areas are sequentially arranged as a first concentric ring area, a second concentric ring area and a third concentric ring area from the inner ring to the outer ring, and the first concentric ring area, the second concentric ring area and the third concentric ring area are each provided with twelve subareas correspondingly along the circumferential direction;
[0016] Among them, the display window corresponding to level I is located in the third concentric circle area, the display window corresponding to level II is located in the second concentric circle area, the display window corresponding to level III is located in the second concentric circle area, the display window corresponding to level IV is located in the third concentric circle area, the display window corresponding to level V is located in the third concentric circle area, the display window corresponding to level VI is located in the second concentric circle area, and the display window corresponding to level VII is located in the first concentric circle area.
[0017] Further, a vacant partition is arranged circumferentially between the display window corresponding to level I and the display window corresponding to level II, a vacant partition is arranged circumferentially between the display window corresponding to level II and the display window corresponding to level III, the display window corresponding to level III and the display window corresponding to level IV are arranged adjacent to each other circumferentially, a vacant partition is arranged circumferentially between the display window corresponding to level IV and the display window corresponding to level V, a vacant partition is arranged circumferentially between the display window corresponding to level V and the display window corresponding to level VI, a vacant partition is arranged circumferentially between the display window corresponding to level VI and the display window corresponding to level VII, and the display window corresponding to level VII is arranged adjacent to the display window corresponding to level I.
[0018] Furthermore, a connecting shaft is included, which is passed through the center of the chord progression disk and the center of the chord content disk so that the chord progression disk and the chord content disk are rotatably overlapped.
[0019] Furthermore, the connecting shaft includes a screw and a nut, a first through hole is opened at the center of the chord content disk, and a second through hole is opened at the center of the chord series disk, so that the end of the screw can pass through the first through hole and the second through hole and be threadedly connected to the nut, and a silicone anti-slip pad is arranged between the chord series disk and the chord content disk.
[0020] Furthermore, both sides of the chord content disk are provided with a plurality of chord diagrams arranged regularly in the form of a plurality of concentric circles surrounding the center.
[0021] It can be seen from the above technical scheme that the chord disk of the utility model, which is convenient for practicing playing, marks the corresponding seven levels in turn on the seven display windows on the chord level disk according to the clockwise movement rule, so that the multiple chord diagrams on the chord content disk are displayed through the seven display windows to reveal the corresponding seven chord diagrams, thereby indicating the corresponding movement rule of the chords and the levels. The design concept is novel, simple and easy to learn, which is convenient for beginners to master the commonly used seven chords and the corresponding levels more quickly, and the wheel is rotated for selection. The layout of the chords and levels is reasonable, the structure is simple, the volume is small, and it is easy to carry and store.
[0022] In order to make the technical concept and other purposes, advantages, features and functions of the present invention more clearly understood, preferred embodiments will be specifically cited in the following specific implementation manner and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments 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 creative work.
[0024] Figure 1 It is a schematic diagram of the structure of a chord plate that is convenient for practicing playing provided by an embodiment of the present application;
[0025] Figure 2 This is a front view of a chord plate that is convenient for practicing playing provided by an embodiment of the present application;
[0026] Figure 3 The embodiment of the present application provides a rear view of a chord plate that is convenient for practicing playing;
[0027] Figure 4 The embodiment of the present application provides a side view of a chord plate that is convenient for practicing playing;
[0028] Figure 5 The present invention provides an exploded view of the structure of a chord disc that is convenient for practicing playing.
[0029] The above drawings include the following reference numerals:
[0030] 100, chord content disk; 110, chord diagram; 120, first perforation;
[0031] 200, chord progression disk; 210, concentric ring area; 211, display window; 212, partition; 213, second perforation; 220, first concentric ring area; 230, second concentric ring area; 240, third concentric ring area;
[0032] 300. Connecting shaft; 310. Nut; 320. Screw; 330. Silicone anti-skid pad. DETAILED DESCRIPTION
[0033] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.
[0034] Please also read Figures 1 to 5 This embodiment provides a chord plate that is convenient for practicing playing, including:
[0035] A chord content disk 100, at least one side of which has a plurality of different chord diagrams 110, wherein the plurality of chord diagrams 110 are regularly arranged to form a plurality of concentric circles around a center; and
[0036] The chord progression disk 200 is movably stacked on the chord content disk 100, and a plurality of concentric ring areas 210 are provided on a side of the chord progression disk 200 away from the chord content disk 100. The plurality of concentric ring areas 210 are provided with at least seven display windows 211 according to a predetermined rule, wherein the seven display windows 211 are marked with corresponding progressions in a clockwise or counterclockwise direction, so that the plurality of chord diagrams 110 are displayed through the seven display windows 211 to expose the corresponding seven chord diagrams 110, thereby presenting a progression rule corresponding to the chords and progressions.
[0037] It can be seen that the chord disk for practicing playing of the present embodiment has seven display windows 211 on the chord progression disk 200 marked with corresponding seven progressions in a clockwise direction, so that the multiple chord diagrams 110 on the chord content disk 100 are displayed through the seven display windows 211 to expose the corresponding seven chord diagrams 110, thereby indicating the progression law corresponding to the chords and progressions. The design concept is novel, simple and easy to learn, which is convenient for beginners to master the commonly used seven chords and the corresponding progressions more quickly, and the selection is performed by rotating the wheel. The layout of the chords and progressions is reasonable, the structure is simple, the volume is small, and it is easy to carry and store.
[0038] In this embodiment, if Figure 5 As shown, the multiple chord diagrams 110 are regularly arranged to form three concentric circles, and the multiple concentric ring areas 210 are correspondingly provided with three, that is, the three concentric circles formed by the distribution of the multiple chord diagrams 110 are correspondingly provided with the three concentric ring areas 210 .
[0039] Specifically, if Figure 3 As shown, the three concentric circles are arranged in sequence from the inner ring to the outer ring as the first concentric circle distribution, the second concentric circle distribution and the third concentric circle distribution;
[0040] The chord diagram 110 of the first concentric circle distribution is A7, #A7, B7, C7, #C7, D7, #D7, E7, F7, #F7, G7, #G7 in clockwise order;
[0041] The chord diagram 110 of the second concentric circle distribution is Am7, #Am7, Bm7, Cm7, #Cm7, Dm7, #Dm7, Em7, Fm7, #Fm7, Gm7, #Gm7 in clockwise order;
[0042] The chord diagram 110 of the third concentric circle distribution is Amaj7, #Amaj7, Bmaj7, Cmaj7, #Cmaj7, Dmaj7, #Dmaj7, Emaj7, Fmaj7, #Fmaj7, Gmaj7, and #Gmaj7 in clockwise order.
[0043] The chord content disk 100 includes twelve modes of major third, minor third, half diminished seventh, major seventh, minor seventh, and seventh chords, with a total of 72 chords.
[0044] Furthermore, if Figure 1 and Figure 5 As shown, the seven display windows 211 are marked with seven different levels, which are Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ, and Ⅶ in clockwise order. The seven levels are preferably marked in clockwise direction to facilitate observation and practice by beginners.
[0045] Furthermore, if Figure 1 and Figure 5 As shown, the display window 211 corresponding to the Ⅰ level is correspondingly provided with a selected key start mark KEY. In this way, KEY is designed as a selected key. After the mode is selected, the seven commonly used chords in the key are practiced, and the corresponding levels are presented to facilitate the user to practice chords in the key. For example, when KEY=G: Ⅰ=G, Ⅱ=Am, Ⅲ=Bm, Ⅳ=C, Ⅴ=D, Ⅵ=Em, Ⅶ=#Fm7-5.
[0046] Among them, when practicing changing the key, find the chord progression corresponding to the song, record the corresponding chord series, and then change to the corresponding chords of other modes according to the series progression rules. For example, "Beyond Really Love You": C--G--Am--F--C--G--C. Its corresponding chord series in C key is: Ⅰ--V--VI--IV--Ⅰ--V--Ⅰ. Now align the KEY of the chord series disk 200 with G, and the selected key is G. The corresponding chord series is: Ⅰ(G)--V(D)--VI(Em)--IV(C)--Ⅰ(G)--V(D)--Ⅰ(G). At this time, the "Really Love You" you play is the G version, and other modes can be deduced by analogy.
[0047] In this embodiment, if Figure 2 and Figure 5 As shown, the three concentric ring areas 210 are sequentially arranged as a first concentric ring area 220, a second concentric ring area 230 and a third concentric ring area 240 from the inner ring to the outer ring, and the concentric ring area 210 is divided into twelve partitions 212 along the circumferential direction, that is, the first concentric ring area 220, the second concentric ring area 230 and the third concentric ring area 240 are each provided with twelve partitions 212 correspondingly along the circumferential direction, so that the thirty-six chord diagrams 110 are arranged in one-to-one correspondence with the thirty-six partitions 212.
[0048] Among them, Figure 2 As shown, the display window 211 corresponding to the I level is located in the third concentric circular area 240, the display window 211 corresponding to the II level is located in the second concentric circular area 230, the display window 211 corresponding to the III level is located in the second concentric circular area 230, the display window 211 corresponding to the IV level is located in the third concentric circular area 240, the display window 211 corresponding to the V level is located in the third concentric circular area 240, the display window 211 corresponding to the VI level is located in the second concentric circular area 230, and the display window 211 corresponding to the VII level is located in the first concentric circular area 220.
[0049] Specifically, if Figure 1 and Figure 2 As shown, a vacant partition 212 is arranged circumferentially between the display window 211 corresponding to the Ⅰ level and the display window 211 corresponding to the Ⅱ level marked on the chord progression disk 200, a vacant partition 212 is arranged circumferentially between the display window 211 corresponding to the Ⅱ level and the display window 211 corresponding to the Ⅲ level, the display window 211 corresponding to the Ⅲ level and the display window 211 corresponding to the Ⅳ level are arranged adjacent to each other along the circumferential direction, and the display window 211 corresponding to the Ⅳ level is arranged adjacent to the display window 211 corresponding to the Ⅳ level. A vacant partition 212 is arranged circumferentially between the display windows 211 corresponding to the V level, a vacant partition 212 is arranged circumferentially between the display windows 211 corresponding to the V level and the display windows 211 corresponding to the VI level, a vacant partition 212 is arranged circumferentially between the display windows 211 corresponding to the VI level and the display windows 211 corresponding to the VII level, and the display windows 211 corresponding to the VII level and the display windows 211 corresponding to the I level are arranged closely along the circumferential direction.
[0050] Among them, Figure 1 and Figure 2 As shown, the display window 211 is a hollow opening located on a partition 212 of the chord progression disk 200 , and seven display windows 211 are respectively arranged on seven partitions 212 , while the remaining partitions 212 are not provided with display windows 211 and are referred to as empty partitions 212 .
[0051] In this embodiment, if Figure 4 and Figure 5 As shown, the chord disk further includes a connecting shaft 300, which is passed through the center of the chord progression disk 200 and the center of the chord content disk 100 so that the chord progression disk 200 and the chord content disk 100 can be movably stacked, so that the chord progression disk 200 can be rotated relative to the chord content disk 100 and the display window 211 marked KEY corresponds to the corresponding mode to select the tune.
[0052] Furthermore, if Figure 5As shown, the connecting shaft 300 includes a screw 320 and a nut 310, a first through hole 120 is opened at the center of the chord content disk 100, and a second through hole 213 is opened at the center of the chord progression disk 200, so that the end of the screw 320 is passed through the first through hole 120 and the second through hole 213 and is threadedly connected with the nut 310, and a silicone anti-skid pad 330 is arranged between the chord progression disk 200 and the chord content disk 100, and the silicone anti-skid pad 330 is opened with a through hole, so that the screw 320 is inserted into the through hole of the silicone anti-skid pad 330, and the silicone anti-skid pad 330 allows the user to effectively avoid accidental rotation and dislocation between the chord progression disk 200 and the chord content disk 100 when practicing chords in tune.
[0053] The ends of the screw 320 and the nut 310 that are away from each other are both provided with end caps, so that the end caps of the screw 320 and the end caps of the nut 310 are respectively abutted against the outer side surfaces of the chord progression disk 200 and the chord content disk 100 for assembly. When tuning is required, the screw 320 is loosened to rotate the chord progression disk 200 relative to the chord content disk 100 and to match the display window 211 marked KEY with the corresponding mode for tuning.
[0054] Furthermore, if Figure 3 As shown, both sides of the chord content disk 100 are regularly arranged with multiple chord diagrams 110 in the form of multiple concentric circles surrounding the center. In this way, the multiple chord diagrams 110 on the side of the chord content disk 100 away from the chord progression disk 200 can be used by the user to practice playing the guitar with pure chords. Of course, the chord progression disk 200 can also be removed, and the chord progression disk 200 can be used to practice playing pure chords by referring to the multiple chord diagrams 110 on the side of the chord content disk 100 facing the chord progression disk 200. In this way, the user can practice pure chords, chords within the key, and changes to the key through the chord disk, so that beginners can master the common chords of the twelve keys more quickly, making chords simple and easy to learn, improving the user experience, and having multiple uses, small size, and easy to carry.
[0055] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:
[0056] The utility model is a chord disk for practicing and playing. Seven display windows 211 on the chord progression disk 200 are marked with corresponding seven progressions in a clockwise direction, so that a plurality of chord diagrams 110 on the chord content disk 100 are displayed through the seven display windows 211 to expose the corresponding seven chord diagrams 110, thereby indicating the progression law corresponding to the chords and progressions. The design concept is novel and simple to learn, which is convenient for beginners to master the commonly used seven chords and the corresponding progressions more quickly. The wheel is rotated for tuning selection, the layout of the chords and progressions is reasonable, the structure is simple, the volume is small, and it is convenient to carry and store.
[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0059] It should be noted that, in the description of the present application, unless otherwise clearly specified and limited, the terms "set, connect, connect, install" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0060] It should be understood that when an element is referred to as being "on" or "connected to" another element, it may be directly on the other element or directly connected to the other element, or an indirect connection may be made with an intervening element between the two. Conversely, when an element is referred to as being "directly" "on" or "directly connected to" another element, there are no intervening elements between the two.
[0061] In addition, it should be noted that in the description of the present invention, the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application. In the description of the present invention, unless otherwise stated, the meaning of "multiple" refers to two or more.
[0062] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.
Claims
1. A chord plate for practicing playing, characterized in that: include: A chord content disk, at least one side of which has a plurality of different chord diagrams, wherein the plurality of chord diagrams are regularly arranged to form a plurality of concentric circles surrounding a center; as well as A chord progression disk, the chord progression disk is rotatably stacked on the chord content disk, and a plurality of concentric ring areas are provided on a side of the chord progression disk away from the chord content disk, and at least seven display windows are opened in the plurality of concentric ring areas according to a predetermined rule, wherein the seven display windows are marked with corresponding progressions in a clockwise or counterclockwise direction, so that the plurality of chord diagrams are displayed through seven of the display windows to reveal the corresponding seven chord diagrams, thereby presenting a progression rule corresponding to the chords and progressions.
2. The chord plate for practicing playing according to claim 1, characterized in that: The plurality of chord diagrams are regularly arranged to form three concentric circles, and three of the plurality of concentric ring areas are correspondingly provided.
3. The chord plate for practicing playing according to claim 1, characterized in that: The three concentric circles are arranged in sequence from the inner ring to the outer ring as a first concentric circle distribution, a second concentric circle distribution and a third concentric circle distribution; The chord diagram of the first concentric circle distribution is A7, # A7, B7, C7, # C7, D7, # D7, E7, F7, # F7, G7, # G7; The chord diagram of the second concentric circle distribution is Am7, # Am7, Bm7, Cm7, # Cm7, Dm7, # Dm7, Em7, Fm7, # Fm7, Gm7, # Gm7; The chord diagram of the third concentric circle distribution is Amaj7, # Amaj7, Bmaj7, Cmaj7, # Cmaj7, Dmaj7, # Dmaj7, Emaj7, Fmaj7, # Fmaj7, Gmaj7, # Gmaj7.
4. The chord plate for practicing playing according to claim 3, characterized in that: The seven display windows are correspondingly marked with seven different levels, and are Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ, Ⅵ, Ⅶ in clockwise order.
5. The chord plate for practicing playing according to claim 4, characterized in that: The display window corresponding to level I is provided with a selection start mark.
6. The chord plate for practicing playing according to claim 4, characterized in that: The three concentric ring areas are sequentially arranged as a first concentric ring area, a second concentric ring area and a third concentric ring area from the inner ring to the outer ring, and the first concentric ring area, the second concentric ring area and the third concentric ring area are each provided with twelve subareas correspondingly along the circumferential direction; Among them, the display window corresponding to level I is located in the third concentric circle area, the display window corresponding to level II is located in the second concentric circle area, the display window corresponding to level III is located in the second concentric circle area, the display window corresponding to level IV is located in the third concentric circle area, the display window corresponding to level V is located in the third concentric circle area, the display window corresponding to level VI is located in the second concentric circle area, and the display window corresponding to level VII is located in the first concentric circle area.
7. The chord plate for practicing playing according to claim 6, characterized in that: There is a vacant partition spaced circumferentially between the display window corresponding to level Ⅰ and the display window corresponding to level Ⅱ, there is a vacant partition spaced circumferentially between the display window corresponding to level Ⅱ and the display window corresponding to level Ⅲ, the display window corresponding to level Ⅲ and the display window corresponding to level Ⅳ are arranged closely along the circumferential direction, there is a vacant partition spaced circumferentially between the display window corresponding to level Ⅳ and the display window corresponding to level Ⅴ, there is a vacant partition spaced circumferentially between the display window corresponding to level Ⅵ and the display window corresponding to level Ⅵ, there is a vacant partition spaced circumferentially between the display window corresponding to level Ⅵ and the display window corresponding to level Ⅶ, and the display window corresponding to level Ⅶ and the display window corresponding to level Ⅰ are arranged closely along the circumferential direction.
8. The chord plate for practicing playing according to any one of claims 1 to 7, characterized in that: The invention also comprises a connecting shaft rod, which is passed through the center of the chord progression disk and the center of the chord content disk so that the chord progression disk and the chord content disk are rotatably overlapped.
9. The chord plate for practicing playing according to claim 8, characterized in that: The connecting shaft includes a screw and a nut, a first through hole is opened at the center of the chord content disk, and a second through hole is opened at the center of the chord progression disk, so that the end of the screw can pass through the first through hole and the second through hole and be threadedly connected with the nut, and a silicone anti-slip pad is arranged between the chord progression disk and the chord content disk.
10. The chord plate for practicing playing according to any one of claims 1 to 7, characterized in that: Both sides of the chord content disk are provided with a plurality of chord diagrams arranged regularly in the form of a plurality of concentric circles surrounding the center.