Fastening device and musical instrument

Abstract

The application discloses a musical instrument and a fastening device for the musical instrument. The musical instrument comprises a first part, a second part and a third part, the first part is provided with a first socket, the second part is provided with a second socket aligned with the first socket, the first part and the second part are configured to switch between an unfolded state and a folded state, and the fastening device comprises a rotating assembly and a sliding assembly. The rotating assembly is configured to rotate with the third part; the sliding assembly is arranged on one side of the first part, and the sliding assembly comprises a sliding piece and a sliding shaft, the sliding shaft is fixed on the sliding piece, the sliding piece is in contact with the rotating assembly, and the sliding piece is configured to move towards the first socket during rotation of the rotating assembly, so as to drive the sliding shaft to move towards the first socket, thereby enabling the sliding shaft to be inserted into the first socket and the second socket when the first part and the second part are in the unfolded state. In this way, the rigidity of the joint of the first part and the second part is enhanced.

Description

Technical Field

[0001] This invention relates to the field of musical instrument technology, and more particularly to a fastening device and a musical instrument. Background Technology

[0002] In folding guitars, the neck and body fold together for easy carrying. However, during use, especially during energetic performances, vigorous shaking and jumping can cause the neck to wobble, leading to folding between the neck and body. Therefore, improving the rigidity of the neck-body joint when the guitar is unfolded is a crucial technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] The present invention provides a fastening device and a musical instrument to solve at least one of the aforementioned technical problems.

[0004] The fastening device of this invention is used in a musical instrument, which includes a first part, a second part, and a third part. The first part has a first insertion hole, the second part has a second insertion hole aligned with the first insertion hole, and the third part is rotatably disposed on the first part. The first and second parts are configured to switch between an unfolded state and a folded state. The fastening device includes a rotating assembly and a sliding assembly. The rotating assembly is configured to rotate with the third part. The sliding assembly is disposed on one side of the first part and includes a slider and a sliding shaft. The sliding shaft is fixed to the slider and contacts the rotating assembly. The slider is configured to move toward the first insertion hole during the rotation of the rotating assembly to drive the sliding shaft toward the first insertion hole, thereby inserting the sliding shaft into the first and second insertion holes when the first and second parts are in the unfolded state.

[0005] In the fastening device of the present invention, the sliding shaft is inserted into the first and second sockets when the first and second parts are in the unfolded state. This provides additional support points and prevents the first and second parts from switching from the unfolded state to the folded state, thereby significantly enhancing the rigidity of the joint between the first and second parts, effectively preventing the first or second part from swaying in the unfolded state, and improving the stability of the instrument and the user experience.

[0006] In some embodiments, the sliding shaft is configured to move toward the first socket between a first position and a second position. When the first part and the second part are in the unfolded state, the sliding shaft is in the first position and is inserted into the first socket and the second socket. When the first part and the second part are in the folded state, the sliding shaft is in the second position and is located outside the first socket and the second socket.

[0007] In some embodiments, the rotating assembly includes a rotating shaft and a rotating block connected to one end of the rotating shaft, the rotating shaft being configured to rotate following the third part, the rotating block being wedge-shaped and configured to rotate about the axis of the rotating shaft, and the rotating block contacting the slider.

[0008] In some embodiments, the slider includes a first surface and a second surface that is angularly connected to the first surface. When the sliding shaft is in the first position, the rotating block abuts against the first surface, and when the sliding shaft is in the second position, the rotating block abuts against the second surface.

[0009] In some embodiments, the sliding assembly further includes a compression member abutting against the sliding member, the sliding member and the rotating assembly maintaining close contact under the action of the compression member, the compression member being in a first compression state when the sliding shaft is in the first position; and the compression member being in a second compression state when the sliding shaft is in the second position, the compression amount of the compression member in the second compression state being less than the compression amount of the compression member in the first compression state.

[0010] In some embodiments, the compression member is a compression spring, which is sleeved on the sliding shaft and one end of the compression spring abuts against the sliding member. When the sliding shaft is in the first position, the compression spring is compressed to the first compression state, and when the sliding shaft is in the second position, the compression spring returns to the second compression state.

[0011] In some embodiments, the sliding shaft is clearance-fitted with both the first and second insertion holes. The first part is also provided with a third insertion hole. The sliding member is provided with a fourth insertion hole aligned with the third insertion hole. The fastening device also includes a fixed shaft. One end of the fixed shaft is fixed, and the other end of the fixed shaft is inserted into the third insertion hole and is interference-fitted with the third insertion hole. The middle part of the fixed shaft passes through the fourth insertion hole and is clearance-fitted with the fourth insertion hole.

[0012] In some embodiments, the fastening device further includes a fixing bracket, the first part including a first body and a first coupling member fixed to the first body, the first coupling member having the third insertion hole, the end of the fixing shaft away from the first coupling member being fixedly connected to the fixing bracket, and the fixing bracket being fixed to the first body.

[0013] In some embodiments, the number of sliding shafts is at least two, the number of first sockets is at least two, the number of second sockets is at least two, each sliding shaft corresponds to one first socket and one second socket, and two adjacent sliding shafts are symmetrically arranged about the centerline of the fixed shaft.

[0014] The musical instrument according to the embodiments of the present invention includes the fastening device described in any of the above embodiments.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of a musical instrument according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A magnified view of part a of the musical instrument;

[0019] Figure 3 This is a schematic diagram of a sliding shaft inserted into a first socket and a second socket according to an embodiment of the present invention;

[0020] Figure 4 yes Figure 3 Partial sectional view;

[0021] Figure 5 This is a schematic diagram of an embodiment of the present invention in which the sliding shaft is located outside the first and second sockets;

[0022] Figure 6 yes Figure 5 Partial sectional view.

[0023] Explanation of reference numerals in the attached figures:

[0024] Fastening device 100; musical instrument 200; first part 201; second part 202; third part 203; first socket 2010; second socket 2020; rotating assembly 10; sliding assembly 20; sliding member 21; sliding shaft 22; rotating shaft 11; rotating block 12; first surface 210; second surface 211; compression member 23; third socket 2011; fourth socket 212; fixed shaft 30; fixed bracket 40; first body 2012; first connecting member 2013; second connecting member 2021; second body 2022. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0030] In foldable musical instruments, although the folding mechanism has a self-locking function, it lacks rigidity. Therefore, when the instrument is in the unfolded state, the two foldable parts of the instrument may still fold together, which will affect the user experience.

[0031] Please refer to Figure 1 and Figure 2 The fastening device 100 of this embodiment is used for a musical instrument 200, which includes a first part 201, a second part 202, and a third part 203. Please continue to refer to... Figure 3 and Figure 4 The first part 201 is provided with a first socket 2010, the second part 202 is provided with a second socket 2020 aligned with the first socket 2010, and the third part 203 is rotatably disposed on the first part 201. The first part 201 and the second part 202 are configured to switch between an unfolded state and a folded state. The fastening device 100 includes a rotating assembly 10 and a sliding assembly 20.

[0032] The rotating assembly 10 is configured to rotate with the third part 203; the sliding assembly 20 is disposed on one side of the first part 201, and the sliding assembly 20 includes a slider 21 and a sliding shaft 22. The sliding shaft 22 is fixed on the slider 21, and the slider 21 contacts the rotating assembly 10. The slider 21 is configured to move toward the first socket during the rotation of the rotating assembly 10, so as to drive the sliding shaft 22 to move toward the first socket, thereby inserting the sliding shaft 22 into the first socket 2010 and the second socket 2020 when the first part 201 and the second part 202 are in the unfolded state.

[0033] In the fastening device 100 of this embodiment, when the first part 201 and the second part 202 are unfolded, as the third part 203 rotates, the rotating assembly 10 rotates accordingly and drives the sliding member 21 to move, thereby pushing the sliding shaft 22 and inserting the sliding shaft 22 into the first insertion hole 2010 and the second insertion hole 2020. Since the sliding shaft 22 is inserted into the first insertion hole 2010 and the second insertion hole 2020 when the first part 201 and the second part 202 are in the unfolded state, this provides an additional support point, preventing the first part 201 and the second part 202 from switching from the unfolded state to the folded state, thereby significantly enhancing the rigidity of the joint between the first part 201 and the second part 202, effectively preventing the first part 201 or the second part 202 from swaying in the unfolded state, and improving the stability and user experience of the musical instrument 200.

[0034] Specifically, the musical instrument 200 can be a guitar, violin, or other foldable musical instrument 200. For example, the musical instrument 200 is a guitar, with the first part 201 being the guitar body, the second part 202 being the guitar neck, and the third part 203 being the guitar frame. In use, the neck and body can fold together, and the frame can rotate around the body. As another example, the first part 201 and the third part 203 are respectively the first and second units of a foldable neck, and the second part 202 is the guitar body. In use, the entire foldable neck can fold together with the body, and the second unit of the foldable neck can rotate around the first unit.

[0035] In the musical instrument 200, the relative positional change of the first part 201 and the second part 202 enables the musical instrument 200 to unfold and fold; the rotation of the third part 203 drives the rotating component 10 to move, which in turn drives the sliding component 20 to move, thereby enhancing the rigidity of the joint between the first part 201 and the second part 202 when they are in the unfolded state.

[0036] The first insertion hole 2010 is a hole structure provided on the first part 201. The second insertion hole 2020 is a hole structure provided on the second part 202. Both the first insertion hole 2010 and the second insertion hole 2020 are used to insert the sliding shaft 22, and the sliding shaft 22 is limited by the hole walls forming the first insertion hole 2010 and the second insertion hole 2020. At the same time, the actuation relationship between the sliding shaft 22 and the hole wall will increase the rigidity of the joint between the first part 201 and the second part 202.

[0037] The number of first sockets 2010 and second sockets 2020 can be one or more. The shapes of the first sockets 2010 and second sockets 2020 can be regular shapes such as squares or circles, or they can be irregular shapes. The dimensions of the first sockets 2010 and second sockets 2020 can be the same or different. The shape and dimensions of the first sockets 2010 and second sockets 2020 can be adjusted according to the design of the sliding shaft 22. For example, both the first sockets 2010 and second sockets 2020 can be circular holes with the same diameter, which facilitates the insertion of the circular sliding shaft 22.

[0038] Alignment of the first socket 2010 and the second socket 2020 means that the central axis of the first socket 2010 and the central axis of the second socket 2020 are collinear.

[0039] The third part 203 is rotatably mounted on the first part 201 via a bearing connection or hinge.

[0040] The first part 201 and the second part 202 can be folded together using a folding device. When folding is needed, the first part 201 and the second part 202 can move closer to each other until they are flush, thus actuating the folding device and switching from an unfolded state to a folded state. When unfolding is needed, the first part 201 and the second part 202 can move further apart, thus actuating the folding device and switching from a folded state to an unfolded state.

[0041] The rotating assembly 10 may include components such as a rotating shaft or a rotating bearing. The rotating assembly 10 may be fixedly connected to the third part 203, so that the rotating assembly 10 can rotate with the third part 203. For example, the rotating assembly 10 is engaged with the third part 203, and the rotating assembly 10 rotates with the third part 203 during the rotation of the third part 203.

[0042] The sliding assembly 20 is used to cooperate with the rotating assembly 10 to convert the rotation of the rotating assembly 10 into the movement of the sliding member 21 and the sliding shaft 22 in the sliding assembly 20 toward the first insertion hole. The conversion method can be gear and rack transmission, or lead screw and slider transmission with linkage mechanism, etc.

[0043] The sliding shaft 22 can be fixed to the sliding member 21 by means of threaded connection, snap-fit, or other mechanical connection. The sliding shaft 22 and the sliding member 21 can also be integrally formed, which can reduce the connection gap and weak points between the sliding member 21 and the sliding shaft 22, and significantly improve the overall rigidity of the sliding assembly 20.

[0044] In use, the third part 203 is driven to rotate, thereby causing the rotating assembly 10 to rotate. Simultaneously, the rotation of the rotating assembly 10 causes the sliding member 21 to move towards the first insertion hole, thus causing the sliding shaft 22 fixed on the sliding member 21 to move towards the first insertion hole. This allows the sliding shaft 22 to be inserted into or removed from the first insertion hole 2010 and the second insertion hole 2020. When the first part 201 and the second part 202 are in the unfolded state, the sliding shaft 22 can be in a... Figure 4 In the state shown, the sliding shaft 22 is inserted into the first insertion hole 2010 and the second insertion hole 2020, thereby enhancing the rigidity of the joint between the first part 201 and the second part 202.

[0045] The shape of the sliding shaft 22 can be customized as needed. For example, the sliding shaft 22 can be a straight shaft, a curved shaft, or a shaft of other shapes. In one embodiment, the sliding shaft 22 is a straight shaft, and the slider 21 is configured to move linearly along the axial direction of the sliding shaft 22 during the rotation of the rotating assembly 10, thereby driving the sliding shaft 22 to move linearly. This configuration of the sliding assembly 20 results in a compact structure, reducing the overall space occupied by the fastening device 100 and improving the space utilization of the musical instrument 200.

[0046] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the sliding shaft 22 is configured to move toward the first socket between a first position and a second position. When the first part 201 and the second part 202 are in an unfolded state, the sliding shaft 22 is in the first position and is inserted into the first socket 2010 and the second socket 2020. When the first part 201 and the second part 202 are in a folded state, the sliding shaft 22 is in the second position and is located outside the first socket 2010 and the second socket 2020.

[0047] Thus, by inserting the sliding shaft 22 into the first socket 2010 and the second socket 2020 in the unfolded state and withdrawing it from the first socket 2010 and the second socket 2020 in the folded state, the fastening device 100 can increase the rigidity of the joint between the first part 201 and the second part 202 when the instrument 200 is in the unfolded state, and can avoid the adverse effects of the fastening device 100 on the folding process of the instrument 200.

[0048] like Figure 4 As shown, in the unfolded state, the sliding shaft 22 is in the first position and inserted into the first socket 2010 and the second socket 2020. This design effectively enhances the rigidity of the joint between the second part and the first part. The insertion of the sliding shaft 22 can limit the relative movement between the second part and the first part, preventing the second part from swaying during use, thereby improving the stability and reliability of the instrument 200.

[0049] like Figure 6 As shown, in the folded state, the sliding shaft 22 is outside the first socket 2010 and the second socket 2020, which can prevent the sliding shaft 22 from affecting the folding function of the instrument 200.

[0050] Specifically, the first position and the second position are two specific positions of the sliding shaft 22 during its movement toward the first socket. The first position corresponds to the fully unfolded state of the instrument 200, in which the sliding shaft 22 is inserted into the first socket 2010 and the second socket 2020; the second position corresponds to the fully folded state of the instrument 200, in which the sliding shaft 22 is disengaged from the first socket 2010 and the second socket 2020.

[0051] The first and second positions can correspond to the angles of rotation of the rotating assembly 10. For example, taking the angle of rotation of the rotating assembly 10 when the sliding shaft 22 is in the first position as 0 degrees as a reference, the angle of rotation of the rotating assembly 10 when the sliding shaft 22 is in the second position can be 180 degrees. Of course, the angle of rotation of the rotating assembly 10 in the second position can also be other angles, and the embodiments of the present invention do not limit this.

[0052] Please refer to Figure 3 and Figure 5 In some embodiments, the rotating assembly 10 includes a rotating shaft 11 and a rotating block 12 connected to one end of the rotating shaft 11. The rotating shaft 11 is configured to rotate following the third part 203. The rotating block 12 is wedge-shaped and configured to rotate about the axis of the rotating shaft 11. The rotating block 12 is in contact with the slider 21.

[0053] Thus, the wedge-shaped rotating block 12 ensures that the contact force between the rotating block 12 and the slider 21 is evenly distributed during rotation. This allows the rotating block 12 to smoothly convert the rotational motion into the movement of the slider 21 toward the first insertion hole, thereby enhancing the stability of force transmission. The wedge design provides a gradually increasing contact force, making the movement of the slider 21 smoother and more precise.

[0054] Specifically, the rotating block 12 can be connected to one end of the rotating shaft 11 by means of threaded connection, snap-fit, or other mechanical connection. The rotating block 12 and the rotating shaft 11 can also be integrally formed, which can reduce the connection gap and weak points between the rotating block 12 and the rotating shaft 11, and significantly improve the overall rigidity of the rotating assembly 10.

[0055] The rotating shaft 11 can be fixedly connected to the third part 203 so as to rotate with the third part 203. For example, the third part 203 is provided with a hole for mounting the third part 203, and the third part 203 can be interference-fitted to the hole so that the third part 203 drives the rotating shaft 11 to rotate when it rotates.

[0056] Wedges can be designed with different angles and shapes, such as isosceles trapezoids and triangles, to adapt to different force transmission requirements.

[0057] Please refer to Figure 3 and Figure 5 In some embodiments, the slider 21 includes a first surface 210 and a second surface 211 connected at an angle to the first surface 210. When the sliding shaft 22 is in the first position, the rotating block 12 abuts against the first surface 210, and when the sliding shaft 22 is in the second position, the rotating block 12 abuts against the second surface 211.

[0058] Thus, when the sliding shaft 22 is in the first position, the rotating block 12 abuts against the first surface 210 of the sliding member 21, ensuring that the sliding shaft 22 can be accurately inserted into the first insertion hole 2010 and the second insertion hole 2020. The rotating block 12 also prevents the sliding shaft 22 from exiting the first insertion hole 2010 and the second insertion hole 2020, ensuring the stability of the sliding shaft 22's position and thus guaranteeing the rigidity of the joint between the first part 201 and the second part 202. When the sliding shaft 22 is in the second position, the rotating block 12 abuts against the second surface 211 of the sliding member 21, limiting the movement stroke of the sliding shaft 22 and improving the efficiency of the sliding shaft 22's next insertion into the first insertion hole 2010 and the second insertion hole 2020.

[0059] Specifically, the first surface 210 and the second surface 211 are two different surfaces on the slider 21, connected at an angle. The first surface 210 and the second surface 211 can be planes, curved surfaces, or other geometric shapes. For example, both the first surface 210 and the second surface 211 are planes, the first surface 210 can be a surface parallel to the horizontal plane, and the second surface 211 can be a surface inclined relative to the horizontal plane.

[0060] Please refer to Figure 4 and Figure 6In some embodiments, the sliding assembly 20 further includes a compression member 23, which abuts against the sliding member 21. The sliding member 21 and the rotating assembly 10 are kept in close contact under the action of the compression member 23. When the sliding shaft 22 is in the first position, the compression member 23 is in a first compression state; when the sliding shaft 22 is in the second position, the compression member 23 is in a second compression state. The compression amount of the compression member 23 in the second compression state is less than the compression amount of the compression member 23 in the first compression state.

[0061] Thus, when the sliding shaft 22 is in the first position, the compression member 23 is in a first compression state. This state provides sufficient force to ensure that the sliding member 21 tightly abuts against the rotating assembly 10, ensuring that the sliding shaft 22 can be stably inserted into the socket. When the sliding shaft 22 is in the second position, the compression member 23 is in a second compression state, with a reduced compression amount, thereby reducing the resistance when the sliding shaft 22 exits the socket, making the movement of the sliding shaft 22 smoother and facilitating its reset. At the same time, the sliding member 21 and the rotating assembly 10 maintain close contact under the action of the compression member 23, ensuring the continuity and linearity of the sliding shaft 22's movement trajectory.

[0062] Specifically, the compression member 23 can generate force through elastic deformation to ensure that the sliding member 21 maintains close contact with the rotating assembly 10 and provides necessary elastic support during the movement of the sliding shaft 22. The compression member 23 can be a compression spring, a rubber spring, or an elastic washer, etc.

[0063] In the first compression state, the compression member 23 provides a large elastic force to ensure that the sliding shaft 22 is stably inserted into the socket; in the second compression state, the elastic force of the compression member 23 decreases, making it easier for the sliding shaft 22 to smoothly exit the socket.

[0064] Please refer to Figure 4 and Figure 6 In some embodiments, the compression member 23 is a compression spring, which is sleeved on the sliding shaft 22 and one end of the compression spring abuts against the sliding member 21. When the sliding shaft 22 is in the first position, the compression spring is compressed to the first compression state. When the sliding shaft 22 is in the second position, the compression spring returns to the second compression state.

[0065] Thus, when the sliding shaft 22 is in the first position, the compression spring is compressed to the first compression state, providing a large elastic force to ensure that the sliding shaft 22 can be firmly inserted into the socket, thereby enhancing the reliability of the connection. When the sliding shaft 22 is in the second position, the compression spring returns to the second compression state, reducing the resistance when the sliding shaft 22 exits the socket, allowing the sliding shaft 22 to exit the socket smoothly.

[0066] Furthermore, the compression spring can disperse the contact force between the sliding member 21 and the rotating assembly 10, reducing localized wear and thus extending the service life of both the sliding member 21 and the rotating assembly 10. Simultaneously, the elastic force of the compression spring can absorb a certain amount of impact force, further protecting the fastening device 100 from damage.

[0067] Specifically, the compression spring can be fitted onto the sliding shaft 22 in different ways, such as by directly fitting it or by using a guide sleeve for auxiliary fitting.

[0068] During the unfolding of the first part 201 and the second part 202, the third part 203 is driven to rotate, thereby causing the rotating shaft 11 to rotate. The rotating block 12 connected to one end of the rotating shaft 11 rotates with the rotating shaft 11 and drives the slider 21 to move toward the first insertion hole, so that the sliding shaft 22 fixed on the slider 21 moves toward the first insertion hole until the sliding shaft 22 moves to the first position. During this process, the compression spring is compressed from the second compression state to the first compression state.

[0069] During the folding of the first part 201 and the second part 202, the third part 203 rotates in the opposite direction, thereby driving the rotating shaft 11 to rotate. The rotating block 12 connected to one end of the rotating shaft 11 rotates with the rotating shaft 11 and drives the slider 21 to move toward the first insertion hole, so that the sliding shaft 22 fixed on the slider 21 moves toward the first insertion hole until the sliding shaft 22 moves to the second position. During this process, the compression spring returns from the first compressed state to the second compressed state.

[0070] Please refer to Figure 4 and Figure 6 In some embodiments, the sliding shaft 22 is clearance-fitted with the first insertion hole 2010 and the second insertion hole 2020. The first part 201 is also provided with a third insertion hole 2011. The sliding member 21 is provided with a fourth insertion hole 212 aligned with the third insertion hole 2011. The fastening device 100 also includes a fixed shaft 30. One end of the fixed shaft 30 is fixed, and the other end of the fixed shaft 30 is inserted into the third insertion hole 2011 and is interference-fitted with the third insertion hole 2011. The middle part of the fixed shaft 30 passes through the fourth insertion hole 212 and is clearance-fitted with the fourth insertion hole 212.

[0071] Thus, the fixed shaft 30 ensures that the sliding member 21 remains stable during movement, guarantees the straightness of the sliding shaft 22, and prevents the sliding shaft 22 from shifting or wobbling when inserted into or withdrawing from the socket, ensuring smooth movement of the sliding shaft 22. By ensuring stable movement of the sliding shaft 22, the sliding shaft 22 can smoothly insert into and withdraw from the first socket 2010 and the second socket 2020, preventing the sliding shaft 22 from getting stuck during movement and avoiding jamming caused by shifting or wobbling.

[0072] Specifically, the alignment of the third socket 2011 and the fourth socket 212 means that the central axis of the third socket 2011 is collinear with the central axis of the fourth socket 212.

[0073] The third socket 2011 is a hole structure provided on the first part 201. The third socket 2011 can be a blind hole provided on the first part 201. The third socket 2011 is spaced apart from the first socket 2010. The fourth socket 212 is a hole structure provided on the slider 21. The fourth socket 212 can be a through hole passing through the slider 21.

[0074] The number of third sockets 2011 and fourth sockets 212 can be one or more. The shapes of third sockets 2011 and fourth sockets 212 can be regular shapes such as squares or circles, or they can be irregular shapes. The dimensions of third sockets 2011 and fourth sockets 212 can be the same or different. The shape and dimensions of third sockets 2011 and fourth sockets 212 can be adjusted according to the design of the fixed shaft 30. For example, both third sockets 2011 and fourth sockets 212 can be circular holes with the same diameter, which facilitates the insertion of a circular fixed shaft 30.

[0075] One end of the fixed shaft 30 can be fixed to the first part 201 or to other parts of the musical instrument 200. Both ends of the fixed shaft 30 are fixed, and the middle part passes through the fourth insertion hole 212 of the slider 21. Therefore, the fixed shaft 30 can limit the offset of the slider 21 during its movement, thereby ensuring the straightness of the slider 22.

[0076] Please refer to Figure 2 , Figure 4 and Figure 6 In some embodiments, the fastening device 100 further includes a fixing bracket 40. The first part 201 includes a first body 2012 and a first coupling member 2013 fixed on the first body 2012. The first coupling member 2013 is provided with a third insertion hole 2011. One end of the fixing shaft 30 away from the first coupling member 2013 is fixedly connected to the fixing bracket 40. The fixing bracket 40 is fixed on the first body 2012.

[0077] Thus, by setting the first connecting member 2013 and the fixed bracket 40, the fixed shaft 30 is fixed. This method facilitates the installation and adjustment of the fixed shaft 30, thereby improving the flexibility of its use. Furthermore, the fixed bracket 40, fixed to the first body 2012, provides additional support for the fixed shaft 30, thereby enhancing its stability. This design prevents the fixed shaft 30 from loosening or shaking under stress, ensuring more stable movement of the sliding shaft 22.

[0078] Specifically, the fixed bracket 40 is a structure used to support and fix the fixed shaft 30, and can be made of metal or high-strength plastic. The fixed bracket 40 provides stable support for the fixed shaft 30, preventing it from loosening or shaking under stress, and ensuring the stability of the sliding component 21's movement. The fixed bracket 40 can be fixed to the first body 2012 by means of threaded connection, snap-fit, or other mechanical connection. The fixed bracket 40 and the first body 2012 can be detachably connected, which facilitates the replacement of the fixed bracket 40 and extends the service life of the fastening device 100.

[0079] The first body 2012 is the main structure of the first part 201 of the musical instrument 200. The first connecting member 2013 is a structure disposed at the joint between the first part 201 and the second part 202, used to engage with the second part 202. The first connecting member 2013 can be fixed to the first body 2012 by bolt connection, snap-fit, or other mechanical connection. The first connecting member 2013 and the first body 2012 can also be an integrally formed structure, which can reduce the connection gaps and weak points between the first connecting member 2013 and the first body 2012, and significantly improve the overall rigidity of the first part 201.

[0080] The first connector 2013 may be provided with a first socket 2010. The third socket 2011 may be provided on the first connector 2013 in an area spaced apart from the first socket 2010.

[0081] The second part 202 may further include a second connector 2021 and a second body 2022. The second connector 2021 is fixed to the second body 2022. The second connector 2021 is connected to the first connector 2013. The second connector 2021 may be provided with the aforementioned second insertion hole 2020. When the sliding shaft 22 is inserted into the first insertion hole 2010 and the second insertion hole 2020, the first connector 2013 and the second connector 2021 form a whole.

[0082] The second body 2022 is the main structure of the second part 202 of the musical instrument 200. The second connecting piece 2021 can be fixed to the second body 2022 by bolt connection, snap-fit ​​or other mechanical connection.

[0083] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the number of sliding shafts 22 is at least two, the number of first sockets 2010 is at least two, the number of second sockets 2020 is at least two, each sliding shaft 22 corresponds to one first socket 2010 and one second socket 2020, and two adjacent sliding shafts 22 are symmetrically arranged about the centerline of the fixed shaft 30.

[0084] Thus, the number of sliding shafts 22 is at least two, and two adjacent sliding shafts 22 are symmetrically arranged about the centerline of the fixed shaft 30. This symmetrical design can distribute the force, making the force borne by each sliding shaft 22 more even, ensuring that the insertion and withdrawal of the sliding shafts 22 are smoother during movement, thereby improving the load-bearing capacity and stability of the fastening device 100, and thus ensuring the rigidity of the joint between the first part 201 and the second part 202.

[0085] The musical instrument 200 of the present invention includes the fastening device 100 of any of the above embodiments.

[0086] Since the musical instrument 200 includes the fastening device 100 described above, the musical instrument 200 includes at least all the beneficial effects of the fastening device 100 described above.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fastening device for a musical instrument, characterized in that, The musical instrument includes a first part, a second part, and a third part. The first part has a first socket, the second part has a second socket aligned with the first socket, and the third part is rotatably mounted on the first part. The first and second parts are configured to switch between an unfolded state and a folded state. The fastening device includes: A rotating assembly configured to rotate in accordance with the third part; A sliding assembly is disposed on one side of the first part. The sliding assembly includes a slider and a sliding shaft. The sliding shaft is fixed on the slider. The slider is in contact with the rotating assembly. The slider is configured to move toward the first socket during the rotation of the rotating assembly to drive the sliding shaft to move toward the first socket, thereby inserting the sliding shaft into the first socket and the second socket when the first part and the second part are in the unfolded state.

2. The fastening device according to claim 1, characterized in that, The sliding shaft is configured to move toward the first socket between a first position and a second position. When the first part and the second part are in the unfolded state, the sliding shaft is in the first position and is inserted into the first socket and the second socket. When the first part and the second part are in the folded state, the sliding shaft is in the second position and is located outside the first socket and the second socket.

3. The fastening device according to claim 2, characterized in that, The rotating assembly includes a rotating shaft and a rotating block connected to one end of the rotating shaft. The rotating shaft is configured to rotate following the rotation of the third part. The rotating block is wedge-shaped and configured to rotate about the axis of the rotating shaft, and the rotating block is in contact with the sliding member.

4. The fastening device according to claim 3, characterized in that, The slider includes a first surface and a second surface that is angularly connected to the first surface. When the sliding shaft is in the first position, the rotating block abuts against the first surface. When the sliding shaft is in the second position, the rotating block abuts against the second surface.

5. The fastening device according to claim 2, characterized in that, The sliding assembly further includes a compression member, which abuts against the sliding member. The sliding member and the rotating assembly are kept in close contact under the action of the compression member. When the sliding shaft is in the first position, the compression member is in a first compression state. When the sliding shaft is in the second position, the compression member is in a second compression state, and the compression amount of the compression member in the second compression state is less than the compression amount of the compression member in the first compression state.

6. The fastening device according to claim 5, characterized in that, The compression component is a compression spring, which is sleeved on the sliding shaft, with one end of the compression spring abutting against the sliding component. When the sliding shaft is in the first position, the compression spring is compressed to the first compression state. When the sliding shaft is in the second position, the compression spring returns to the second compression state.

7. The fastening device according to claim 1, characterized in that, The sliding shaft is clearance-fitted with both the first and second insertion holes. The first part is also provided with a third insertion hole. The sliding member is provided with a fourth insertion hole aligned with the third insertion hole. The fastening device also includes a fixed shaft. One end of the fixed shaft is fixed, and the other end of the fixed shaft is inserted into the third insertion hole and is interference-fitted with the third insertion hole. The middle part of the fixed shaft passes through the fourth insertion hole and is clearance-fitted with the fourth insertion hole.

8. The fastening device according to claim 7, characterized in that, The fastening device further includes a fixing bracket. The first part includes a first body and a first connecting member fixed on the first body. The first connecting member is provided with the third insertion hole. The end of the fixing shaft away from the first connecting member is fixedly connected to the fixing bracket. The fixing bracket is fixed on the first body.

9. The fastening device according to claim 7, characterized in that, The number of sliding shafts is at least two, the number of first sockets is at least two, the number of second sockets is at least two, each sliding shaft corresponds to one first socket and one second socket, and two adjacent sliding shafts are symmetrically arranged about the centerline of the fixed shaft.

10. A musical instrument, characterized in that, The musical instrument includes a fastening device as described in any one of claims 1-9.

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