A guitar chord assist fingering device

Abstract

This invention provides a guitar chord assist fretting device, relating to the field of chord assisting equipment. It includes a fixed frame connected to the headstock, at least one manual string presser, and at least one electric string presser. The manual string presser performs string pressing by manipulating a corresponding manual drive mechanism mounted on the fixed frame, and the electric string presser performs string pressing by controlling a corresponding electric drive mechanism mounted on the fixed frame. This invention uses a combination of manual and electric string pressers, allowing multiple strings to be pressed with a small number of motors, improving space utilization, and reducing cost.

Description

Technical Field

[0001] This invention relates to the field of chord assist devices, and more specifically to a guitar chord assist fingering device. Background Technology

[0002] When playing the guitar, the left hand needs to press down chords while the right hand plucks the strings. A chord presser is a tool to assist the left hand in pressing down chords. A common chord presser involves pressing a button located on a spring plate, which then presses down on the string – entirely manual operation, which is quite strenuous. For example, Chinese patent CN201820925076.9 relates to a guitar playing aid for pressing strings, including a support frame. The support frame has a support mounting structure, and a spring plate is provided on the support frame. The spring plate has a fixed end and a movable end. The fixed end of the spring plate and the support frame are connected by a quick-installation structure. A button is located on the front of the movable end of the spring plate, and a string pressing block is located on the back of the movable end of the spring plate. When playing the guitar, human power is used to drive the elastic plate to deform. When there are multiple string-pressing blocks with a large span on the same elastic plate, it is impossible to press all the string-pressing blocks in place by pressing at one point, and the required pressing force is large. In addition, setting multiple elastic plates at the same time will make the mechanical structure of the chord assist device complex. The complex mechanical structure has a high failure rate. Furthermore, setting multiple elastic plates will make it difficult to press multiple strings at a distance at the same time.

[0003] Chinese patent CN201820565385.X provides a pressing aid device for assisting guitar chord playing, including a bottom clamp, a fixing plate, a connector, a housing, chord keys, a motor assembly, and a direct-acting component. The bottom plate is located below the guitar's fretboard, while the mounting plate is located above it. A connector links the bottom plate and the mounting plate together. The outer shell is mounted on the mounting plate, and the chord keys are mounted on the outer shell, matching the number of chords on the guitar. The number of motor units is the same as the number of chord keys, with each motor unit containing the same number of motors as the number of chords. Each motor is mounted on the mounting plate, and the outer shell covers all the motors. The number of direct-acting components is the same as the number of motors, with each direct-acting component passing through the mounting plate. One end of each direct-acting component is connected to the output shaft of a corresponding motor, and the other end of each direct-acting component is aligned with a corresponding chord. During the pressing of a chord key, the motor drives the direct-acting component to press the chord. The pressing force is small, simplifying the practice process and protecting the user. However, since the motor units are all located on the mounting plate and within the outer shell, it increases the thickness of the chord aid, resulting in low space utilization and high cost. Furthermore, the multiple chord keys are usually laid out flat, making it difficult to press multiple chord keys at a distance simultaneously.

[0004] In conclusion, overcoming the aforementioned shortcomings is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This solution addresses the problems and needs mentioned above by proposing a guitar chord-assisting fingering device, which solves the aforementioned technical problems by adopting the following technical solutions.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A guitar chord assist fretting device includes a fixed frame connected to the headstock, and further includes at least one manual fretting block and at least one electric fretting block. The manual fretting block performs the string pressing action by manipulating a corresponding manual drive mechanism disposed on the fixed frame, and the electric fretting block performs the string pressing action by controlling a corresponding electric drive mechanism disposed on the fixed frame.

[0008] Furthermore, the manual drive mechanism has a manual operation part, and the electric drive mechanism has an electric operation part. When an external force is applied to the corresponding manual operation part, it can simultaneously act on the corresponding electric operation part to achieve combined linkage.

[0009] Furthermore, the electric operating part is a trigger switch, and the corresponding trigger switch controls the motor drive component of the corresponding electric drive mechanism to work through the drive circuit to drive the corresponding electric key block.

[0010] Furthermore, it also includes a battery module integrated on the mounting bracket to provide power to the electric drive mechanism.

[0011] Furthermore, the motor drive assembly includes a long shaft, a motor, and a transmission mechanism. The motor is connected to one end of the long shaft via the transmission mechanism, and at least one radially extending electric key block is connected to the long shaft.

[0012] Furthermore, the long axis spans at least one string.

[0013] Furthermore, the manual drive mechanism is an elastic sheet with one end fixed to the fixed frame. The elastic sheet has at least one manual string pressing block facing the guitar. Both the manual string pressing block and the electric string pressing block are provided with buffer pads that contact the strings.

[0014] Furthermore, the elastic sheet is provided with a pressing boss facing away from the guitar.

[0015] Furthermore, a trigger switch is provided on the pressing protrusion.

[0016] Furthermore, the manual drive mechanism is a resilient button mounted on the fixed frame and located above the strings.

[0017] Furthermore, the elastic button is equipped with a trigger switch.

[0018] Furthermore, the trigger switch is a mechanical button, a touch switch, or a sensor switch.

[0019] Furthermore, the mounting bracket is provided with several support bolts that can abut against the front of the guitar.

[0020] As can be seen from the above technical solution, the beneficial effects of the present invention are:

[0021] 1. The combination of manual and electric string pressers allows for easy pressing of two or more strings over long distances at a low cost;

[0022] 2. The trigger switch for controlling the motor is installed on the manual drive mechanism. When the finger presses the trigger switch, it also presses the manual string pressing block. While the manual string pressing block presses the corresponding string, the motor drives the corresponding long shaft to rotate, causing the electric string pressing block to press the corresponding string. Therefore, multiple strings can be pressed with a small number of motors, which is low in cost and easy to operate.

[0023] 3. The motor is mounted on the side, with its long shaft extending deep into the chord. Therefore, the motor does not need to be installed inside the chord, which avoids excessively high mounting brackets and improves space utilization.

[0024] In addition to the objectives, features, and advantages described above, the preferred embodiments of the invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate a better understanding of the features and advantages of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. The accompanying drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to this.

[0026] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0027] Figure 2 This is a schematic diagram of an installation structure for the trigger switch of the present invention.

[0028] Figure 3 This is a schematic diagram of another installation structure for the trigger switch of the present invention.

[0029] Figure 4 This is a schematic diagram of the long axis of the present invention.

[0030] Figure 5 This is a schematic diagram showing the installation position of the support bolts of the present invention.

[0031] Reference numerals: 1. Fixing bracket; 11. Support bolt; 2. Manual drive mechanism; 21. Elastic sheet; 22. Elastic button; 3. Trigger switch; 4. Long shaft; 41. Electric keypad; 42. Buffer pad; 5. Battery module; 6. Drive circuit; 7. Motor drive assembly. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] This application discloses a guitar chord assist fingering device that can press multiple strings with the assistance of a small number of motors, improves space utilization, and has a low cost.

[0034] The following combination Figures 1 to 5 Showing content, such as Figure 1 , Figure 2 and Figure 3 As shown, the device is described below. A guitar chord-assisting string-pressing device includes a fixed frame 1 detachably connected to the headstock, at least one manual string-pressing block, and at least one electric string-pressing block 41. The manual string-pressing block is connected to a corresponding manual drive mechanism 2 mounted on the fixed frame 1. The manual string-pressing block performs the string-pressing action by manipulating the corresponding manual drive mechanism 2 mounted on the fixed frame 1. The electric string-pressing block 41 is connected to a corresponding electric drive mechanism mounted on the fixed frame 1. The electric string-pressing block 41 performs the string-pressing action by controlling the operation of the corresponding electric drive mechanism mounted on the fixed frame 1. The combination of the manual string-pressing block and the electric string-pressing block, using the manual drive mechanism 2 and the electric drive mechanism to simultaneously drive the manual string-pressing block and the electric string-pressing block located at different positions, allows for easy pressing of two or more strings at a distance. It is convenient to use, low in cost, and avoids the problem of incomplete pressing caused by one manual drive mechanism 2 simultaneously driving multiple manual string-pressing blocks. It is reliable in use, and the electric operating part of the electric drive mechanism can be centrally located with the manual drive mechanism 2 for easier operation.

[0035] The manual drive mechanism 2 and the electric drive mechanism can operate independently or in conjunction with each other.

[0036] In the embodiments of this application, the manual drive mechanism has a manual operation part, and the electric drive mechanism has an electric operation part. When an external force is applied to the corresponding manual operation part, it can simultaneously act on the corresponding electric operation part to realize the combined linkage of the manual string pressing block and the electric string pressing block.

[0037] Specifically, pressing the manual operation part of the corresponding manual drive mechanism can drive the corresponding manual string pressing block to perform string pressing operation, and at the same time, it can connect the corresponding electric operation part to make the corresponding electric drive mechanism work, thereby driving the corresponding electric string pressing block 41 to perform string pressing operation, forming a combined linkage.

[0038] In the embodiments of this application, the electric operating part is a trigger switch 3, and the electric drive mechanism further includes a motor drive component 7. Both the motor drive component 7 and the trigger switch 3 are electrically connected to the drive circuit 6. The corresponding trigger switch 3 controls the corresponding motor drive component 7 to work through the drive circuit 6 to drive the corresponding electric key block 41 to work.

[0039] Specifically, the mounting bracket 1 is fixed to the guitar neck by tightening screws, or it can be fixed by other mounting structures. The drive circuit 6 and the motor drive assembly 7 are both integrated into the mounting bracket 1. Figure 2 As shown in the embodiments of this application, one structure of the manual drive mechanism 2 is an elastic sheet 21 with one end fixed to the fixed frame 1. The elastic plate 21 has a fixed end and a movable end. The fixed end of the elastic plate 21 is connected to the fixed frame 1 through an elastic plate mounting structure. The movable end of the elastic plate 21 facing the guitar has at least one manual string pressing block. The part of the movable end of the elastic plate 21 facing away from the guitar, which is for finger pressing, is the manual operation part of the elastic plate 21. The part of the movable end of the elastic plate 21 facing away from the guitar, which is for finger pressing, has a pressing protrusion or a trigger switch 3. That is, the trigger switch 3 can be set on the manual operation part of the elastic plate 21. All the pressing protrusions on the elastic plate 21 are the same height or different heights for easy operation. The trigger switch 3 can also be set on pressing protrusions of different heights for easy operation. The distribution of the manual string pressing blocks connected to the elastic plate 21 and their relative positional relationship with other elastic plates 21 can be defined as arbitrary shapes. In use, the elastic plate 21 is usually connected by screws for detachability. When it is necessary to play different chords, the elastic plate 21 can be replaced. Only the elastic plate 21 corresponding to the changed manual string pressing block needs to be replaced. However, during installation and replacement, the operator needs to install the corresponding elastic piece 21 into the correct position according to the markings.

[0040] like Figure 3As shown in the embodiment of this application, another structure of the manual drive mechanism 2 is an elastic button 22 disposed on the fixed frame 1 and located above the strings. The elastic button 22 is connected to the fixed frame 1 via a mounting bracket. The elastic button 22 is a combination of a movable button and a spring. The movable button is connected to the corresponding manual string pressing block. The finger-pressing part of the elastic button 22 is the manual operation part of the elastic button 22. The trigger switch 3 can be disposed on the manual operation part of the movable button of the elastic button 22.

[0041] The trigger switch 3 is installed on the corresponding manual drive mechanism 2. The trigger switch 3 controls the corresponding motor drive component 7 to rotate forward or reverse, thereby controlling the corresponding electric string-pressing block 41 to press down or reset, thus pressing or resetting the string. When the trigger switch 3 is installed on the manual drive mechanism 2, pressing the trigger switch 3 triggers the corresponding motor drive component 7 and simultaneously presses the manual drive mechanism 2. The manual drive mechanism 2 drives the corresponding manual string-pressing block to press the corresponding string, while the motor drive component 7 drives the corresponding electric string-pressing block 41 to press the corresponding string. Therefore, multiple strings can be pressed with a small number of motors, resulting in low cost and convenient operation.

[0042] In actual use, one or more trigger switches 3 can be set on the same manual drive mechanism 2. Multiple trigger switches 3 that can control the motor drive component 7 to perform string pressing action or reset can be distributed on different manual drive mechanisms 2, making it more flexible to use and convenient to meet different chord playing needs.

[0043] Preferably, the trigger switch 3 is a mechanical button, a touch switch, or a sensor switch.

[0044] In embodiments of this application, the guitar chord assist fingering device further includes a battery module 5, which provides power to the drive circuit 6 and the electric drive mechanism. This enables wireless use, allowing for convenient use anytime, anywhere.

[0045] The battery module 5 can be a standalone module or integrated onto the mounting bracket 1. When the battery module 5 is a standalone module, it can be used in combination with different devices, offering better versatility; when the battery module 5 is integrated onto the mounting bracket 1, it is convenient to carry and prevents loss.

[0046] Preferably, in this application, the battery module 5 is integrated on the fixing frame 1, and the battery module 5 is located at one end of the guitar chord auxiliary pressing device, which will not affect pressing the strings, making the layout reasonable, not only occupying little space, but also making the structure beautiful. The battery module 5 is a replaceable battery assembly or a storage battery module with a charging port.

[0047] Specifically, the battery module 5 is located at the end of the guitar chord assist fingering device that is away from the headstock, so it will not affect the tuning.

[0048] like Figure 2 , Figure 3 and Figure 4 As shown in the embodiments of this application, the motor drive assembly 7 includes a long shaft 4, a motor and a transmission mechanism. The motor is connected to one end of the long shaft 4 through the transmission mechanism. At least one radially extending electric string-pressing block 41 is connected to the long shaft 4. By setting multiple electric string-pressing blocks 41, multiple strings can be pressed simultaneously, making chord pressing operation simple.

[0049] Specifically, the long shaft 4 spans at least one string, and the motor and transmission mechanism are both located on the outer surface of the mounting bracket 1. The long shaft 4 is perpendicular to the string, and rotating the long shaft 4 by a corresponding angle allows all the electric finger stops 41 located on the long shaft 4 to simultaneously press and contact the corresponding string, making it easy to control the installation accuracy of the electric finger stops 41. The motor and transmission mechanism being located on the outer surface of the mounting bracket 1 will not excessively occupy the internal space of the mounting bracket 1, resulting in a smaller mounting bracket 1 thickness, thus saving space, and will not affect the use of the manual drive mechanism 2.

[0050] Preferably, both the manual string pressing block and the electric string pressing block 41 are provided with buffer pads 42 that come into contact with the strings. This prevents the manual string pressing block and the electric string pressing block 41 from damaging the strings.

[0051] Specifically, a buffer pad 42 is laid on the string pressing surface of the manual string pressing block and the string pressing surface of the electric string pressing block 41.

[0052] The motor drive assembly 7 may also consist of only a motor, which is mounted on the fixed frame 1. The output shaft of the motor is directly connected to the electric finger block 41 of the electric drive mechanism. The output shaft of the motor is parallel or perpendicular to the instrument surface.

[0053] Preferably, in this application, the motor, transmission mechanism, and drive circuit 6 are all located on the side of the fixing frame 1 closest to the human body. This facilitates thumb pressing of the power control button located on the drive circuit 6 and makes the visible outer surface of this application flat and aesthetically pleasing.

[0054] The transmission mechanism is a transmission reduction mechanism with a worm gear structure. The transmission reduction mechanism can reduce the rotational speed of the long shaft 4, thereby making the rotation angle of the long shaft 4 easier to control and reducing the control difficulty. The worm gear structure enables the transmission mechanism to have a self-locking function.

[0055] The electric drive mechanism can also be a combination structure of chord key 50, motor group 60 and direct-acting component 70 as described in Chinese patent CN201820565385.X. The chord key 50 is equivalent to the trigger switch 3, and the combination of the direct-acting component 70 and the motor group 60 is equivalent to the motor drive component 7 in the embodiment of this application. The combination of the chord key 50 and the manual drive mechanism can enable the manual string pressing action and the electric string pressing action to be performed simultaneously.

[0056] The electric drive mechanism can also be a combination of the string-pressing button 21 and the electric string-pressing device 51 of the musical instrument as described in Chinese Patent CN201711092431.5. The string-pressing button 210 is equivalent to the trigger switch 3, and the electric string-pressing device 51 of the musical instrument has been disclosed in the patent document with publication number CN107068124A. Its structure includes a motor, a gearbox, and a travel sleeve. The gearbox consists of an upper gearbox and a lower gearbox, which are fixedly connected. The motor is installed in the lower gearbox and is connected to a transmission device. The transmission device includes a motor gear, a transmission gear, and a screw. The motor gear is connected to the motor, and the transmission gear is located inside the gearbox. The transmission gear meshes with the motor gear. The screw has a screw gear that meshes with the transmission gear. The lower end of the screw has an external thread, through which a nut is connected. The lower part of the nut has a nut sleeve. The nut is axially reciprocating and sliding within the travel sleeve. The travel sleeve has an upper buffer pad. The nut sleeve is fixedly connected to a push rod. The upper part of the push rod has a lower buffer pad, and the lower end of the push rod has a string-pressing rubber pad, which is equivalent to the electric string-pressing block 41 in the embodiments of this application.

[0057] The manual drive mechanism 2 can also be the pressing mechanism 3 in Chinese patent CN201920686961.0. The pressing mechanism 3 is snapped into the corresponding through groove 2 and can slide in the through groove 2. The trigger switch 3 is installed on the top surface of the sliding block 301 or the top surface of the button 305. When the button 305 is pressed, the trigger switch 3 can be triggered.

[0058] The drive circuit 6 receives the trigger signal from the corresponding trigger switch 3 and controls the corresponding motor drive assembly 7 to operate, namely: causing the corresponding long shaft 4 to rotate forward, enabling the electric fret block 41 to press the corresponding string. After the trigger switch 3 is released, the drive circuit 6 controls the corresponding motor drive assembly 7 to operate, namely: causing the corresponding long shaft 4 to rotate in the reverse direction, causing the electric fret block 41 to separate from the string and reset. Using this method, pressing the trigger switch 3 also presses the corresponding manual drive mechanism 2. The manual drive mechanism 2 drives the corresponding manual fret block to press the corresponding string, while the long shaft 4 rotates to cause the electric fret block 41 to press the corresponding string. Therefore, multiple strings can be pressed with a small number of motors, thus improving space utilization. Users can play with fewer trigger switches 3, reducing the difficulty of pressing chords and providing a better user experience.

[0059] The electric operating part can also be directly mounted on the fixed frame 1, and the manual drive mechanism 2 can trigger the corresponding electric operating part when it is pressed down.

[0060] Specifically, the mechanical button or inductive switch in the trigger switch 3 is located below the elastic sheet 21 or below the pressing head of the elastic button 22. After the elastic sheet 21 or the elastic button 22 is pressed down and deformed, it can trigger the corresponding trigger switch 3, which can also meet the requirements of the linkage combination of the manual string pressing block and the electric string pressing block 41.

[0061] like Figure 5 As shown, the fixing frame 1 is provided with several support bolts 11 that can abut against the front of the guitar.

[0062] Specifically, the support bolt 11 is threaded onto the fixing frame 1. The extension length of the support bolt 11 can be adjusted by screwing the support bolt 11, so that the screw cap of the support bolt 11 can reliably abut against the front of the guitar, making the support effective and reliable. This can prevent the fixing frame 1 from deforming or prevent the side fixing structure of the fixing frame 1 from suddenly loosening and causing the fixing frame 1 to suddenly fall and damage the strings or guitar surface.

[0063] It should be noted that the embodiments described in this invention are merely preferred ways of implementing this invention. Any modifications that are merely obvious and belong to the overall concept of this invention should be within the protection scope of this invention.

Claims

1. A guitar chord assisting string pressing device comprising a fixing frame (1) connected with a headstock, characterized in that, It also includes at least one manual pressing block and at least one electric pressing block (41), the manual pressing block completes the pressing action by operating the corresponding manual driving mechanism (2) arranged on the fixed frame (1), and the electric pressing block (41) completes the pressing action by controlling the corresponding electric driving mechanism arranged on the fixed frame (1), wherein the manual driving mechanism has a manual operation part, the electric driving mechanism has an electric operation part, and when external force acts on the corresponding manual operation part, it can simultaneously act on the corresponding electric operation part to realize combined linkage.

2. The guitar chord assist stringing device of claim 1, wherein, The electric operation part is a trigger switch (3), and the corresponding trigger switch (3) drives the motor driving assembly (7) of the corresponding electric driving mechanism to work through the driving circuit (6) to drive the corresponding electric pressing block (41) to work.

3. The guitar chord assist stringing device of claim 1, wherein, It also includes a battery module (5) integrated on the fixed frame (1) to provide power for the electric driving mechanism.

4. The guitar chord assist stringing device of claim 2, wherein, The motor driving assembly (7) includes a long shaft (4), a motor, and a transmission mechanism, the motor is connected with one end of the long shaft (4) through the transmission mechanism, and at least one electric pressing block (41) extending radially is connected to the long shaft (4).

5. The guitar chord assist stringing device of claim 4, wherein, The long shaft (4) spans at least one string.

6. The guitar chord assist stringing device of claim 1, wherein, The manual driving mechanism (2) is an elastic sheet (21) fixed at one end of the fixed frame (1), at least one manual pressing block is arranged on the elastic sheet (21) facing the guitar direction, and a buffer pad (42) in contact with the string is arranged on the manual pressing block and the electric pressing block (41).

7. The guitar chord assist stringing device of claim 6, wherein, The elastic sheet (21) is provided with a pressing boss away from the guitar direction.

8. The guitar chord assist stringing device of claim 7, wherein, The pressing boss is provided with a trigger switch (3).

9. The guitar chord assist stringing device of claim 1, wherein, The manual driving mechanism (2) is an elastic button (22) arranged on the fixed frame (1) and located above the string.

10. The guitar chord assist stringing device of claim 9, wherein, The elastic button (22) is provided with a trigger switch (3).

11. The guitar chord assist stringing device of claim 2, wherein, The trigger switch (3) is a mechanical button or a touch switch or an induction switch.

12. The guitar chord assist stringing device of claim 1, wherein, The fixed frame (1) is provided with a plurality of support bolts (11) capable of abutting against the front of the guitar.

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