Abstract: An adapter assembly for a pedestal mount for an electronic device is provided. An assembly for mounting a pedestal mount for an electronic device includes a weldment including a mount plate having a first surface and a second surface, a mount pipe is coupled to the mount plate and extends perpendicularly from the second surface of the mount plate, the first surface of the mount plate configured to receive a base of the pedestal mount, the mount pipe including a non-threaded portion coupled to the mount plate and a threaded portion; an adapter block configured to mate in a recess of a structure, the adapter block including a first aperture configured to receive the mount pipe; and a fastener configured to be disposed over the threaded portion of the mount pipe to secure a portion of the structure between the mount plate and adaptor block.

Abstract: A utility article for protecting and covering the strings of a musical instrument, while providing options for visibility and display. The utility article, including a covering member made of flexible material and having a front side and a rear side. Four flaps extend from the left edge and the right edge of the covering member, wherein two flaps extend outwards to form a sleeve and the two flaps extend rearwards wrapping the neck of the musical instrument. The two pockets will serve for holding the user's common accessories and tools, while an attachable flap will allow the device to second as a guitar strap when not in its primary use.

Abstract: A tuning machine for a stringed instrument comprising an input shaft having an eccentric at an end and being rotatable by a user, a gear member with a central axial bore to receive the eccentric to move the gear member though an eccentric circular motion as the input shaft rotates, the gear member having external teeth, a ring gear having internal teeth positioned around the external teeth of the gear member, the ring gear accommodates the gear member such that at least one of the external teeth meshes with and drives at least one of the internal teeth as the gear member moves through its eccentric circular motion to rotate the ring gear about its central axis, and a string post driven by the ring gear to wind or unwind a string of the instrument as a result of rotation of the input shaft.

Abstract: A lens barrel includes: a lens frame that holds a lens and is movable in the optical axial direction of the lens; and a moving mechanism that moves the lens frame in the optical axial direction. The moving mechanism includes: a feed screw; a drive source that rotates the feed screw; a biasing member that biases the lens frame toward direction side; a nut on the direction side of the lens frame that is screwed with the feed screw; and a low-friction member between the nut and the lens frame in the optical axial direction. At least one of a friction coefficient between the lens frame and the low-friction member or a friction coefficient between the nut and the low-friction member is smaller than a friction coefficient between the lens frame and the nut when the lens frame is in contact with the nut.

Abstract: Provided is a machine head adapter for mounting a machine head, that is misaligned with an existing mounting hole on an instrument, to the instrument. The adapter may include a solid rigid body with a base section of a first thickness, a mounting point extending the base section, a support extension of a second thickness, and a set screw. The support extension extends laterally from an upper part of the base section such that a bottom of the support extension is elevated over a bottom of the base section by a difference between the first thickness and the second thickness. The set screw is positioned about a length of the support extension, and adjustably extends below the bottom of the support extension to the bottom of the base section. The adapter includes a screw for screwing into the existing mounting hole via an opening at the mounting point.

Abstract: Embodiments disclosed herein describe keyless locking tremolo systems and methods for musical instruments that are configured to tune and restrain strings for a musical instrument without an external tool. Embodiments are configured to adjust the vertical positioning of a tightening post and string clamp without an external tool.

Abstract: A musical instrument peg winder that includes a tuning peg engaging head, a handle that extends parallel to and laterally offset from the head, and a coupling unit that interconnects the head to the handle.

Abstract: A tuner for a stringed instrument, comprising: a housing mounted to the stringed instrument; a knob coupled to one end of the housing; a post coupled to the other end of the housing, the knob and the post positioned on a rotation axis, the post for receiving a string and the knob for causing rotation of the post; a gear assembly mounted in the housing between the knob and the post, the gear assembly having a first gear for rotating about the rotation axis and a second gear mounted on a gear body, the second gear having a center axis offset from the rotation axis, the first gear being meshed with the second gear, the gear body including a plurality of pins, being opposed to the second gear, for positioning in a respective plurality of cavities in the housing; wherein the second gear being coupled to the knob and the first gear being coupled to the post.

Abstract: Provided are tune holders for string instruments, comprising: a bar-like first pressing member having a rectangular first surface, the length of the first surface at least spanning across at least two tuning pegs on one side of a string instrument; a bar-like second pressing member having a rectangular second surface, the second surface facing the first surface and the length of the second surface at least spanning across the at least two tuning pegs; and a securing assembly configured to detachably connect and secure the first pressing member and the second pressing member, allowing the first and second surfaces of the first and second members to be pressed against at least two tuning pegs or separated from at least two tuning device.

Abstract: A self-releasing and self-locking string locking mechanism for adjusting a string includes a fixed seat mounted on a stringed instrument, a worm shaft, a worm gear, a rotating shaft and a sleeve. The worm shaft drives and rotates the worm gear, and is installed on the fixed seat. The rotating shaft, pivotally connected on the fixed seat and secured on the worm gear, includes a self-releasing thread having a pitch thread between 1.25 mm and 1.6 mm and applied with a lubricant, and a locking pin. The sleeve is for the locking pin to be inserted therein, and internally includes an inner thread corresponding to the self-releasing thread and a lower surface for the locking pin to abut against. The sleeve is further provided with a through opening for the string to pass through near the lower surface.

Abstract: A tuning key for guitar strings is provided, which enables the remaining portion of guitar strings which is left after being wound on the tuning key when the guitar strings are hung and set. The tuning key for guitar strings comprises a tuning peg on which a worm gear portion is arranged at one side, a coupling body in which a male screw portion is formed, a casing in which a bearing portion is formed, a rotary rod in which a spur gear is arranged, and a nut coupled to the male screw portion of the casing and fixes the casing from a head, wherein tuning keys for guitar strings are provided in the head, and a through-hole through which the remaining portion of guitar strings wound on a winding portion is penetrated and arranged is formed in the center of the rotary rod.

Abstract: A non-geared linear tuning and anchoring system for strings of a stringed musical instrument employing plug-ended strings inserted into the shaft of a string retainer and tensioned by retracting the slidable string retainer within a channel aligned with the strings.

Abstract: There is provided a string adjusting apparatus configured to be used with a string tuning device and with a variety of tuning pegs associated with a variety of stringed musical instruments, the string adjusting apparatus comprising a plurality of peg connectors configured to be detachably coupled to the variety of tuning pegs, and a motor configured to be connected to the automatic tuning device and to be detachably coupled to the plurality of peg connectors. The apparatus further comprising a user interface and a processing unit for enabling a user to select a stringed musical instrument to tune among a displayed list of musical instruments and a processing unit connected to the user interface for receiving the user selection and for automatically determining, as a function thereof, an appropriate tuning frequency, an appropriate peg connector among the plurality of peg connectors and an appropriate torque to be applied by the motor.

Abstract: An apparatus used to tune a stringed instrument string in a limited time period contains a cap, a spring, and a peg cover. When in use, the apparatus is placed over a tuning peg such that the peg cover encloses the tuning peg. The spring is positioned in between the cap and the peg cover. The cap is placed over the peg cover. Therefore the spring can be compressed by pressing on the cap. The cap contains a tubular portion and a first hole. The hole perpendicularly passes through the tubular portion. The peg cover contains a peg receiving cavity and a second hole. The second hole perpendicularly passes through the peg receiving cavity. When the spring is compressed the first hole and the second hole align with each other. The first hole and the second hole are perimetrically large enough for a stringed instrument string to travel through.

Abstract: String tuning devices for stringed musical instruments, such as guitars or the like, comprising of tuning pegs or machine heads that provide equal or practically equal tuning sensitivity for the strings employed on the same instrument such that a unit of rotation of each tuning peg or machine head produces an equal or practically equal tonal shift in its associated string.

Abstract: A combined manual and motorized adjustment drive for adjusting the string tension of a stringed instrument having a tuning peg, a drive motor, a force-transmitting member for transmitting a drive force to the tuning peg and a manually operable adjustment element which couples with the force-transmitting member for manual adjustability of the rotary position of the tuning peg wherein said adjustment drive is improved in that in allows a compact design in addition to reliable self-retention and good adjustability of the manual drive. The force-transmitting member is an at least three-stage reduction gear having a first gear stage on which the drive motor acts with an output shaft and a last gear stage which acts on the tuning peg in order to rotate the latter, and the adjustment element acts on a gear stage of the reduction gear between the first and the last gear stages to introduce the force.

Abstract: A tuning peg for a stringed instrument, in particular a guitar, having a winding section on which a string runs and a fastening means for fixing a free end of the string. To this end, a tuning peg according to the invention comprises a clamping element and, on the tuning peg, an abutment section and a retaining section. The retaining section and clamping element are set up such that the clamping element is displaced axially on the tuning peg along the retaining section and locked in a clamping position. The clamping element and abutment section are set up such that that they clamp and retain a longitudinal section of the free end of the string between them.

Abstract: A tool for musical string instruments that is to be mounted in contact with a vibrating part of the instrument, made up of two stably coupled portions (11, 13; 16, 17; 25, 26, 27, 28), one made of wood, the other made of a material different from wood.

Abstract: An automatic tuning device including a plurality of universal attachment clamp and tuning motor assemblies, a head-mounted electronics enclosure, and a power pedal. A stringed instrument analog signal is processed by electronics in the power pedal, which calculates and then wirelessly sends information about what string is being played and whether it is in tune. The information is received by a head-mounted electronics enclosure, which then actuates a motor to turn a corresponding tuning peg as needed. The tuning motors are disposed on a universal attachment clamp, which is designed to remain on the instrument headstock securely and unobtrusively.

Abstract: Bearing and shaft assemblies include a shaft with at least one depressed region. A first one-way bearing can be positioned on the shaft in a manner such that the first one-way bearing facilitates clockwise rotation and resists counterclockwise rotation. A second one-way bearing can be positioned on the shaft in a manner such that the second one-way bearing facilitates rotation in the second direction and resists rotation in the first direction. The first one-way bearing and the second one-way bearing can be displaced axially along the shaft so the first one-way bearing, the second one-way bearing, or both one-way bearings is/are positioned around the one or more depressed regions of the shaft to facilitate rotation in one direction, both directions or neither direction, as described herein. Other aspects, embodiments, and features are also included.

Abstract: A flexible sleeve for placement around at least a portion of a tuning peg of an instrument, the sleeve comprising: a base with four sides connecting to the base which can be secured to the end of a tuning peg; the sleeve being made from flexible material to enable the base and sides to encase at least the end portion of the tuning peg; and the base and slides forming a grip over the tuning peg, wherein the user of the tuning peg has increased contact and manipulation of the tuning peg.

Abstract: There is provided a string adjusting apparatus configured to be used with a string tuning device and with a variety of tuning pegs associated with a variety of stringed musical instruments, the string adjusting apparatus comprising a plurality of peg connectors configured to be detachably coupled to the variety of tuning pegs, and a motor configured to be connected to the automatic tuning device and to be detachably coupled to the plurality of peg connectors. The apparatus further comprising a user interface and a processing unit for enabling a user to select a stringed musical instrument to tune among a displayed list of musical instruments and a processing unit connected to the user interface for receiving the user selection and for automatically determining, as a function thereof, an appropriate tuning frequency, an appropriate peg connector among the plurality of peg connectors and an appropriate torque to be applied by the motor.

Abstract: A peg turner for a stringed instrument comprises an elongate body portion extending along an axis. The body portion defines first and second opposing ends. A recess is formed in the first end of the body portion, and a tapered peg turner slot is formed in the recess. The tapered peg turner slot comprises an opening at the first end of the body portion, sized to accept a tuning peg of a string instrument. Tapered sides extend from the opening along the rotational axis toward the second end of the body portion, tapering inward to form a compressive coupling for turning the selected peg about the axis with the body portion of the peg turner.

Abstract: The invention relates to a system for adding a string to a stringed instrument, consisting of an additional string and an additional tuning machine which can be clamped onto the head of the stringed instrument using a clamping member. The system moreover preferably comprises a hooking member to which the string can be hooked, and fixing means for fixing the hooking member to the stringed instrument.

Abstract: A string compact adjustment apparatus installed on a head of a stringed instrument includes a tuning peg, a pintle, a string holder, a holding ring, a clamp ring and a compact bushing. The pintle runs through the head. The holding ring and clamp ring run through the pintle and fixedly couple on the head. The string holder is fastened to one end of the pintle close to the holding ring, and the tuning peg is fastened to another end thereof. The compact bushing has a contact surface and the clamp ring has a mating latch surface. The compact bushing is pushed by the tuning peg to allow the contact surface to tightly press the latch surface so that the compact bushing is fixedly coupled on the tuning peg and the tuning peg is fixed without turning reversely, thus string tone can be maintained for a long duration.

Abstract: A combined manual and motorized adjustment drive for adjusting the string tension of a stringed instrument, in particular a guitar, having a tuning peg (5) for winding and unwinding a string running thereon, a drive motor (9), in particular an electric motor, a force-transmitting member for transmitting a drive force generated by the drive motor (9) to the tuning peg (5) for rotating the latter and an adjustment element (24, 25, 26), which must be operated manually, and which couples with the force-transmitting member for manual adjustability of the rotary position of the tuning peg (5), wherein said adjustment drive is improved in that in allows a compact design in addition to reliable self-retention and good adjustability of the manual drive.

Abstract: A tuning peg for a stringed instrument, in particular a guitar, having a winding section, on which a string runs and a fastening means for fixing a free end of the string. To this end, a tuning peg according to the invention comprises a clamping element and, on the tuning peg, an abutment section and a retaining section. The retaining section and clamping element are set up such that the clamping element is displaced axially on the tuning peg along the retaining section and locked in a clamping position. The clamping element and abutment section are set up such that that they clamp and retain a longitudinal section of the free end of the string between them.

Abstract: A multiple string tuning peg for a stringed musical instrument capable of independently tuning at least two strings. It minimizes the amount of clutter at the top end of a stringed instrument and maximizes the use of the mechanical gearing assemblies by sharing mechanical components. A single thumb twist can be physically manipulated to operated the multiple string winding mechanisms.

Abstract: A multiple string tuning peg for a stringed musical instrument capable of independently tuning at least two strings. It minimizes the amount of clutter at the top end of a stringed instrument and maximizes the use of the mechanical gearing assemblies by sharing mechanical components. A single thumb twist can be physically manipulated to operated the multiple string winding mechanisms.

Abstract: A string tuning system useful for both acoustic and amplified instruments provides a nondestructive method and kit to replace existing thumb peg tuning controls with ergonomic orbital controls. Orbital controls are sometimes referred to as “orbs” and may comprise round tuning knobs that make string manipulation ergonomic. In one embodiment, a tuning assembly 800 comprises a headstock bolt 650, comprising a threaded shaft section 651 and nut section 652, with the headstock bolt 650 fitting into the housing 506 of the string attachment shaft 500. The main wall 103 of the orb contains a perpendicular orb void 105, the orb void 105 being sometimes used to accept an orb set screw 106. The orb 100 also comprises an interior center vertical void 104, the interior center vertical void 104 sometimes used to accept an orb collar 107. The orb collar 107 comprising a main pipe like body 114, a bottom edge 109, a top edge 110, an interior vertical void 111 and a perpendicular void 108.

Abstract: String tuning devices for D stringed musical instruments, such as guitars or the like, comprising of tuning pegs or machine heads that provide equal or practically equal tuning sensitivity for the strings employed on the same instrument such that a unit of rotation of each tuning peg or machine head produces an equal or practically equal tonal shift in its associated string.

Abstract: This is a device that keeps the stings of a stringed musical instrument from unwinding over the top of open ended tuning machines.

Abstract: A self-contained tuning stabilizer for a stringed instrument consists of a body which is attachable to the stringed instrument like a capo, the stabilizer containing mechanical members for increasing or decreasing the tension on each of the strings to keep them in tune as the instrument is played. The device contains sensors for each string, an analyzer for determining if the frequency produced by each string is correct, and a driver for each of the mechanical members for applying micro-tuning corrections to the strings. The device must first be zeroed, and the instrument tuned by hand. Thereafter, the device will maintain the original tuning.

Abstract: The invention relates to a tuning device for setting the tension of one or more strings on a stringed instrument, comprising a peg receiving portion (10), which has pairs of bores (14) for rotatably receiving tuning pegs (20), wherein the tuning pegs (20) in each case comprise a peg body with a spindle (26) for insertion into a pair of bores (12, 14) in the peg receiving portion (10) and for winding up the end portion of a string and a peg grip (22), connected to the spindle (26), for turning the spindle (26) about a common axis (a) of the peg grip (22) and the spindle (26). A gear mechanism (33) is provided outside the peg receiving portion (10), functionally between the peg grip (22) and the spindle (26), and passes on to the spindle (26) a turning movement of the peg grip (22) about the common axis (a) that is reduced in its magnitude, wherein the gear mechanism (33) is an eccentric gear mechanism.

Abstract: The mounting position of a winding shaft on a main body is changed, and a peg may be mounted in various stringed instruments by miniaturizing the main body or reducing the thickness thereof. The peg for the stringed instrument includes a main body mounted in the stringed instrument; a worm rotatably supported by the main body, the worm having a knob at an end thereof; a worm wheel engaging with the worm, the worm wheel rotatably supported by the main body; a winding shaft connecting to one side of the worm wheel in an axial direction, the winding shaft for winding a string of the stringed instrument; and bearing holes formed in at least two surfaces of the main body, the bearing holes supporting the winding shaft rotatably.

Abstract: A device for facilitating the stringing of a guitar is provided. More specifically, a device is provided that includes a head portion with at least one member for contacting and maintaining a first end of a guitar string around a cylindrical axle of a guitar bridge while the other end of the string is being interconnected to the tuning pegs of the instrument. Thus, the tool facilitates the stringing of a guitar by, for example, allowing the use of both hands to interconnect a second end of the guitar string to the tuning peg.

Abstract: A method and apparatus for string load reduction and real-time pitch alteration on stringed instruments. A string load is substantially reduced with a camming surface actuator so that the pitch can be rapidly manipulated by an input force which is generated by human power or an electronically controlled motor. Various types of camming surfaces are provided as well as a load optimization calculation which determines the shape of a variable ratio camming surface. Multiple embodiments are described including a constant force pitch alteration device, a motorized control system with pitch compensation and real-time tracking of string pitch to multiple relative input signals, a control signal generator based on real-time position measurement of a control object relative to an electromagnetic radiation sensor, and methods for generating mechanical looping, vibrato, and polyphonic chorus effects which can be automated or dynamically controlled by a user. Other embodiments are described and shown.

Abstract: A String Alignment Plate for stringed instruments to reduce the excess friction in that portion of the string in the head region, generated at the nut of the instrument as a string passes through a notch of the nut and then bends in order to align with the tuning pin or machine head. The additional friction is created at the point of the bend where the string rubs excessively against the nut. This friction impedes tuning and results in differential tension of the string on either side of the nut. The String Alignment Plate is affixed to the head of the instrument and keeps the portion of the string in the head area in-line or parallel with that portion of the same string as it extends from the bridge to the nut, thus removing the bend. Once the string reaches the String Alignment Plate, the string curves around the Peg on the String Alignment Plate to the tuning peg or machine head.

Abstract: The invention provides an instrument or instrument-like device with an attachment capper to personalize and enhance the aesthetic value of a musical experience. Thus the invention provides an instrument attachment capper adapted to connect to an instrument or instrument-like device. The instrument attachment capper has a body that defines a pair of spaced apart faces, one of the faces adapted to be secured to the instrument or instrument-like device, and another of the faces adapted for protective, educational, or decorative purpose(s). The body includes a cup, which may also contain a slit. The invention also provides an instrument attachment capper that is characterized as an acoustic guitar bridge pin. The invention further provides an instrument attachment capper that can be affixed to the instrument with a hook or hangar.

Abstract: Provided is a string tuning mechanism that enables a musician to clamp and anchor a musical instrument string to a musical instrument tuning peg. The claimed subject matter enables the musician to put on and take off the strings of a stringed musical instrument easily and rapidly. The string attachment device also enables the installed musical instrument string to equalize to pitch faster than currently possible and enables a stringed musical instrument to remain in tune longer. The disclosed device is designed to fit easily against a tuning peg and to enable the musician to use the locking of the string to the peg technology without permanently changing the physical state of their musical instrument. Another purpose of the claimed subject matter is to provide a method and device that enables the musician to use the same strings he has always used, and not to have to buy special strings.

Abstract: The invention relates to a protective tuner cover for the tuning section of a stringed musical instrument, such as a guitar. The tuner cover is sized to enclose the instrument headstock, or a substantial portion thereof, and includes a section that encloses and protects the tuning keys and knobs of the musical instrument. When constructed as a unitary structure, the tuner cover can be slid onto the instrument headstock. When constructed from separable components, the tuning cover can be opened and closed over the headstock in a bivalve manner if hinged, or by appropriately spaced latching mechanisms if completely separable. The tuner cover can be constructed to enclose and protect one or two rows of tuning keys and knobs, depending on the type of musical instrument.

Abstract: The mounting position of a winding shaft on a main body is changed, and a peg may be mounted in various stringed instruments by miniaturizing the main body or reducing the thickness thereof. The peg for the stringed instrument includes a main body mounted in the stringed instrument; a worm rotatably supported by the main body, the worm having a knob at an end thereof; a worm wheel engaging with the worm, the worm wheel rotatably supported by the main body; a winding shaft connecting to one side of the worm wheel in an axial direction, the winding shaft for winding a string of the stringed instrument; and bearing holes formed in at least two surfaces of the main body, the bearing holes supporting the winding shaft rotatably.

Abstract: A device is disclosed for adjusting the tension of the strings of a string instrument, especially a guitar, preferably an electric guitar, or a bass, preferably an electric bass, said strings being secured at a first end to a winding mechanism and at a second end to another mount, said device having at least one motor, a gear connected to the motor and flexible shafts connected to the gear for transmission of a rotational movement generated by the combination of the motor and the gear to the winding mechanism whereby the device has fewer motors than there are strings on the string instrument. With this device it is possible to arrange a drive for automatic adjustment of the tension of the strings of the string instrument in a space-saving manner and in the smallest possible amount of space.

Abstract: A stringed musical instrument includes a string which, when vibrated, produces sound. Both ends of the vibrating portion of the string touch glass.

Abstract: A tuning device for a stringed musical instrument comprising a socket to receive a peg of the instrument, a shaft rotatably connected to the socket, a motor to induce rotation of the shaft, a first gear to reduce the shaft rotation and increase torque from the motor, the first gear being engaged to the motor, a second gear to exponentially reduce the reduced shaft rotation, the second gear being engaged between the shaft and the first gear, a cutter to trim a string of the instrument, and a housing to cover and protect the shaft, the motor, and the gears, where the cutter is attached to the housing opposing the socket.

Abstract: A method of adding at least one more string to a stringed instrument having an initial plurality of strings and an initial plurality of tuners equaling the number of initial plurality of strings, wherein the stringed instrument comprises a headstock on which is disposed the initial plurality of tuners, a neck and a body coupled to the neck, wherein among other things, the headstock has a front surface, a rear surface and at least one side planer surface and at least one elongated bore in the side planer surface and wherein the headstock further comprises at least one individual aperture extending from the front surface to the rear surface of the headstock and the elongated bore extends perpendicularly to the aperture, wherein the method comprises the steps of inserting a steel flanged insert into the individual aperture; inserting a shaft, having a first end and a second end, in the elongated bore such that the first end of the shaft extends into the aperture of the headstock; coupling a first end of the at l

Abstract: Provided is a string tuning mechanism that enables a musician to clamp and anchor a musical instrument string to a musical instrument tuning peg. The claimed subject matter enables the musician to put on and take off the strings of a stringed musical instrument easily and rapidly. The string attachment device also enables the installed musical instrument string to equalize to pitch faster than currently possible and enables a stringed musical instrument to remain in tune longer. The disclosed device is designed to fit easily against a tuning peg and to enable the musician to use the locking of the string to the peg technology without permanently changing the physical state of their musical instrument. Another purpose of the claimed subject matter is to provide a method and device that enables the musician to use the same strings he has always used, and not to have to buy special strings.

Abstract: The invention relates to a protective tuner cover for the tuning section of a stringed musical instrument, such as a guitar. The tuner cover is sized to enclose the instrument headstock, or a substantial portion thereof, and includes a section that encloses and protects the tuning keys and knobs of the musical instrument. When constructed as a unitary structure, the tuner cover can be slid onto the instrument headstock. When constructed from separable components, the tuning cover can be opened and closed over the headstock in a bivalve manner if hinged, or by appropriately spaced latching mechanisms if completely separable. The tuner cover can be constructed to enclose and protect one or two rows of tuning keys and knobs, depending on the type of musical instrument.

Abstract: A D-Tuner for mounting on the peghead of a banjo. The D-Tuner has keyed cam pegs, adjustable stops for limiting the extent of rotation of the cam pegs, and linear flexible members attached to the cam pegs. The flexible members are suitable for attachment to the second B string and third G string of a banjo for tuning the banjo when the keyed cam pegs are turned.

Abstract: A string tension adjustment structure includes a dock, a winding axle longitudinally coupling with the dock that has an upper end fastened to a worm gear held in the dock and a lower end to wind a string, and a transverse rotary knob running through the dock that has a worm at one end to engage with the worm gear. The dock has a pair of insertion troughs to hold a U-shaped elastic reed. The elastic reed has a pair of clipping blades each has a notch at the top portion to clip an indented neck formed on the worm to anchor the rotary knob on the dock. The structure is simpler and fabrication and assembly are easier.