Guitar string tuner

Abstract

A guitar string tuner, according to one embodiment of the present invention, comprises: a worm wheel installed on a winding shaft around which a guitar string is wound; a worm shaft having a worm formed thereon that meshes with the worm wheel; a bracket having a first grip portion that rotatably fixes one side of the worm shaft and a second grip portion that rotatably fixes the other side of the worm shaft; a first correction flange that is fastened to a first fastening hole formed perpendicularly to the longitudinal direction of the worm shaft within the first grip portion and comes into contact with one side of the worm shaft to correct backlash between the worm and the worm wheel; and a second correction flange that is fastened to a second fastening hole formed perpendicularly to the longitudinal direction of the worm shaft within the second grip portion, and comes into contact with the other side of the worm shaft to correct backlash between the worm and the worm wheel.

Description

Guitar string tuning device

[0001] The present invention relates to a guitar string tuning device.

[0002] The guitar string tuning device located on the head of the guitar is composed of a winding shaft on which the guitar strings are wound, a worm wheel installed on the winding shaft, and a worm shaft having a worm that meshes with the worm wheel. The user tunes the pitch of the guitar strings by rotating the worm shaft. Depending on the direction of rotation of the worm shaft, the worm wheel meshed with the worm rotates, and as a result, the winding shaft on which the worm wheel is installed rotates, releasing or winding the guitar string further, changing the pitch of the guitar string.

[0003] In the case of this type of guitar tuning device, there was a tolerance between the worm shaft and the worm wheel during the initial manufacturing process, and there was no way to preload it.

[0004] Additionally, when a guitar string tuning device is used continuously, backlash occurs, creating a gap between the teeth of the worm and the worm wheel. This causes the worm and worm wheel to misalign, gradually increasing the force applied to the teeth, potentially damaging the worm and worm wheel. Furthermore, backlash makes fine tuning of the guitar strings impossible.

[0005] The purpose of the present invention is to provide a guitar string tuning device capable of applying a preload.

[0006] The purpose of the present invention is to provide a guitar tuning device capable of compensating backlash.

[0007] In addition, it is obvious that the technical tasks are not limited to the technical tasks described above, and other technical tasks may be derived from the following description.

[0008] According to one embodiment of the present invention, a guitar string tuning device is characterized by including: a worm wheel installed on a winding shaft around which a guitar string is wound; a worm shaft having a worm formed thereon to engage with the worm wheel; a bracket having a first grip portion for rotatably fixing one side of the worm shaft and a second grip portion for rotatably fixing the other side of the worm shaft; a first correction flange fastened to a first fastening hole formed perpendicular to the longitudinal direction of the worm shaft within the first grip portion and in contact with one side of the worm shaft to correct backlash between the worm and the worm wheel; and a second correction flange fastened to a second fastening hole formed perpendicular to the longitudinal direction of the worm shaft within the second grip portion and in contact with the other side of the worm shaft to correct backlash between the worm and the worm wheel.

[0009] In addition, the first compensation flange and the second compensation flange are characterized in that, when rotated in the fastening direction, they move in the direction of the worm shaft so that one end pushes one side and the other side of the worm shaft in the direction of the worm wheel.

[0010] In addition, one end of the first correction flange and the second correction flange is characterized by being rounded.

[0011] In addition, the first compensation flange and the second compensation flange are characterized in that a wrench groove is formed at the other end.

[0012] In addition, the first grip portion and the second grip portion are characterized in that they wrap around a portion of the outer surface of the worm shaft.

[0013] In addition, the worm shaft is characterized in that a first step portion protruding radially is formed on one side thereof, and a second step portion protruding radially is formed on the other side thereof.

[0014] The present invention has the effect of reducing manufacturing tolerances, preventing damage to the worm and worm wheel, and enabling fine tuning of other strings by providing a compensation flange that pushes a worm shaft in which a worm is formed, thereby enabling preload adjustment and backlash compensation.

[0015] In addition, since the effects of the present invention described as such are naturally exerted by the composition of the described contents regardless of whether the inventor is aware of them, the above-described effects are only a few effects according to the described contents and should not be recognized as describing all effects that the inventor has recognized or actually existed.

[0016] In addition, the effects of the present invention should be additionally understood by the entire description of the specification, and even if not explicitly described in sentences, if a person with ordinary knowledge in the technical field to which the described content belongs can recognize such effects through this specification, then it should be regarded as an effect described in this specification.

[0017] FIG. 1 is a drawing showing a guitar tuning device according to one embodiment of the present invention.

[0018] FIG. 2 is a drawing showing a first correction flange and a second correction flange inside a bracket according to one embodiment of the present invention.

[0019] FIG. 3 is a drawing showing the tolerance or backlash between a worm and a worm wheel according to one embodiment of the present invention.

[0020] Figure 4 is a drawing showing that the first compensation flange and the second compensation flange push the worm shaft to compensate for tolerance or backlash.

[0021] When adding reference numbers to components of each drawing in this specification, it should be noted that identical components are given the same numbers as much as possible even if they are shown in different drawings.

[0022] Meanwhile, the meanings of terms described in this specification should be understood as follows. Singular expressions should be understood to include plural expressions unless the context clearly defines otherwise, and terms such as "first" and "second" are intended to distinguish one component from another, and the scope of rights should not be limited by these terms. Terms such as "include" or "have" should be understood to not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0023] The term "at least one" should be understood to include all combinations that can be represented from one or more of the associated items. For example, "at least one of the first, second, and third items" means any combination of items that can be represented from two or more of the first, second, and third items, as well as each of the first, second, and third items.

[0024] FIG. 1 is a drawing showing a guitar tuning device according to one embodiment of the present invention. FIG. 2 is a drawing showing a first compensation flange and a second compensation flange inside a bracket according to one embodiment of the present invention. FIG. 3 is a drawing showing a tolerance or backlash between a worm and a worm wheel according to one embodiment of the present invention. FIG. 4 is a drawing showing that the first compensation flange and the second compensation flange push the worm shaft to compensate for the tolerance or backlash.

[0025] As shown in FIGS. 1 to 4, the guitar tuning device includes a plate (100), a worm wheel (200), a worm shaft (300), a bracket (400), a first compensation flange (500), and a second compensation flange (600).

[0026] The plate (100) is arranged with each component of the guitar tuning devices. The plate (100) on which each component is arranged is installed to the head of the guitar using a fastener.

[0027] On the plate (100), three guitar string tuning devices can be arranged, and the remaining three guitar string tuning devices can be arranged on another plate. In the drawing, three guitar string tuning devices are illustrated as being arranged on the plate (100), but this is only an example, and each guitar string tuning device can be arranged on a different plate (100). In addition, in this case, each guitar string tuning device can be installed on the head of the guitar through the plate (100).

[0028] In addition, in the present invention, it is described that each component of the guitar string tuning devices is arranged on the plate (100), but the guitar string tuning device according to the present invention may be installed directly on the head of the guitar without the plate (100).

[0029] The worm wheel (200) is installed on a winding shaft (250) that is fixedly penetrated on a plate (100). On one side of the winding shaft (250) with respect to the plate (100), a guitar string is wound, and on the other side, the worm wheel (200) is installed. Accordingly, when the worm wheel (200) rotates, the winding shaft (250) rotates, and the guitar string wound on one side of the winding shaft (250) is wound or unwound, so that the guitar string can be tuned.

[0030] The worm wheel (200) rotates by engaging with a worm (350) formed on a worm shaft (300).

[0031] The worm shaft (300) is rotatably fixed by the first grip portion (430) and the second grip portion (460) of the bracket (400), and is placed on the plate (100) in a direction perpendicular to the winding shaft (250) on which the worm wheel (200) is installed.

[0032] The worm shaft (300) has a worm (350) formed in the center that engages with the worm wheel (200).

[0033] The worm shaft (300) has a first step (360) formed on one side protruding radially from the center, and a second step (370) formed on the other side protruding radially.

[0034] The first step portion (360) is placed on the first grip portion (430), and the second step portion (370) is placed on the second grip portion (460), so that the worm shaft (300) can be fixed.

[0035] The bracket (400) is fixedly installed on the plate (100) and includes a first grip portion (430) that rotatably fixes one side of the worm shaft (300) and a second grip portion (460) that rotatably fixes the other side of the worm shaft (300).

[0036] The first grip portion (430) is formed to surround a portion of the outer surface of the worm shaft (300). Specifically, the first grip portion (430) is formed to surround a portion of the outer surface of the first step portion (360) formed on one side of the worm shaft (300). For example, the first grip portion (430) may be formed in the shape of an open 'C'.

[0037] The first grip portion (430) has a first fastening hole (432) formed therein in a direction perpendicular to the longitudinal direction of the worm shaft (300). Accordingly, the first fastening hole (432) may be formed along the direction in which the first grip portion (430) is opened. A first correction flange (500) may be fastened to the first fastening hole (432). At this time, a screw groove may be formed in the first fastening hole (432).

[0038] The second grip portion (460) is formed to surround a portion of the outer surface of the worm shaft (300). Specifically, the second grip portion (460) is formed to surround a portion of the outer surface of the second step portion (370) formed on the other side of the worm shaft (300). For example, the second grip portion (430) may be formed in the shape of an open 'C'.

[0039] The second grip portion (460) has a second fastening hole (462) formed therein in a direction perpendicular to the longitudinal direction of the worm shaft (300). Accordingly, the second fastening hole (462) may be formed along the direction in which the second grip portion (460) is opened. A second correction flange (600) may be fastened to the second fastening hole (462). At this time, a screw groove may be formed in the second fastening hole (462).

[0040] The first compensation flange (500) is fastened to the first fastening hole (432) formed inside the first grip portion (430). At this time, a screw thread may be formed on the outer circumferential surface of the first compensation flange (500). Accordingly, the first compensation flange (500) can be fastened along the fastening groove of the first fastening hole (432). When the first compensation flange (500) is rotated in the fastening direction, it moves toward the worm shaft (300) along the first fastening hole (432), and when it is rotated in the releasing direction, it can move in the opposite direction of the worm shaft (300).

[0041] The first compensation flange (500) can be in contact with one side of the worm shaft (300) to compensate for the tolerance or backlash between the worm (350) and the worm wheel (200). Specifically, the first compensation flange (500) has one end in contact with the first step portion (360) formed on one side of the worm shaft (300), and when rotated in the fastening direction, moves toward the worm shaft (300) to push one side of the worm shaft (300) toward the worm wheel (200). Accordingly, the present invention can provide a preload and compensate for backlash.

[0042] One end of the first compensation flange (500) may be rounded. This is to prevent damage to the first step portion (360) during the backlash compensation process.

[0043] A wrench groove may be formed at the other end of the first compensation flange (500). Accordingly, the first compensation flange (500) may be rotated in the fastening direction or in the releasing direction in the first fastening hole (432) using a wrench.

[0044] The second compensation flange (600) is fastened to the second fastening hole (462) formed inside the second grip portion (460). At this time, a screw thread may be formed on the outer circumferential surface of the second compensation flange (600). Accordingly, the second compensation flange (600) can be fastened along the fastening groove of the second fastening hole (462). When the second compensation flange (600) is rotated in the fastening direction, it moves toward the worm shaft (300) along the second fastening hole (462), and when it is rotated in the releasing direction, it can move in the opposite direction of the worm shaft (300).

[0045] The second compensation flange (600) can be in contact with the other side of the worm shaft (300) to compensate for the tolerance or backlash between the worm (350) and the worm wheel (200). Specifically, the second compensation flange (600) has one end in contact with the second step portion (370) formed on the other side of the worm shaft (300), and when rotated in the fastening direction, moves toward the worm shaft (300) to push the other side of the worm shaft (300) toward the worm wheel (200). Accordingly, the present invention can provide a preload and compensate for backlash.

[0046] One end of the second compensation flange (600) may be rounded. This is to prevent damage to the second step portion (370) during the backlash compensation process.

[0047] A wrench groove may be formed at the other end of the second compensation flange (600). Accordingly, the second compensation flange (600) may be rotated in the fastening direction or in the releasing direction in the second fastening hole (462) using a wrench.

[0048] According to the above-described embodiment, the worm gear corresponding to the worm wheel (200) and the worm shaft (300) according to the guitar tuning device may include other gears. For example, the worm gear may include a roller gear cam.

[0049] Those skilled in the art will appreciate that the present invention described above can be implemented in other specific forms without changing the technical idea or essential features thereof.

[0050] Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included within the scope of the present invention.

Claims

1. A worm wheel installed on the winding shaft on which the guitar strings are wound; A worm shaft having a worm formed therein that meshes with the above worm wheel; A bracket having a first grip portion that rotatably fixes one side of the worm shaft and a second grip portion that rotatably fixes the other side of the worm shaft; A first correction flange that is fastened to a first fastening hole formed perpendicular to the longitudinal direction of the worm shaft within the first grip portion and pushes one side of the worm shaft; and A guitar tuning device characterized by including a second correction flange that is fastened to a second fastening hole formed perpendicular to the longitudinal direction of the worm shaft inside the second grip portion and pushes the other side of the worm shaft.

2. In paragraph 1, The above first compensation flange and second compensation flange, A guitar string tuning device characterized in that when rotated in the direction of fastening, it moves in the direction of the worm shaft and pushes one side and the other side of the worm shaft in the direction of the worm wheel.

3. In paragraph 2, One end of the first compensation flange and the second compensation flange, A guitar string tuning device characterized by being rounded.

4. In paragraph 1, The above first compensation flange and second compensation flange, A guitar string tuning device characterized by a wrench groove formed on the other end.

5. In paragraph 1, The above first grip portion and second grip portion, A guitar string tuning device characterized by wrapping a portion of the outer surface of the above worm shaft.

6. In paragraph 1, A guitar string tuning device characterized in that a first step portion protruding radially is formed on one side of the worm shaft, and a second step portion protruding radially is formed on the other side of the worm shaft.

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