Combined tuning peg with self-locking function

Abstract

The utility model discloses a combined tuning peg with a self-locking function, which comprises a mandrel sleeved with a shaft sleeve. The mandrel penetrates through two opposite tuning peg holes in the headstock, the shaft sleeve and the two tuning peg holes have certain taper, and the shaft sleeve and the two tuning peg holes are in interference fit; the two ends of the mandrel are connected with the limiting piece and the adjusting piece respectively, and the limiting piece and the adjusting piece are clamped on the two sides of the guitar head. The adjusting piece can move along the mandrel, and the adjusting piece can push the shaft sleeve when approaching the limiting piece so as to adjust the fit interference magnitude of the shaft sleeve and the tuning peg hole. The adjusting piece is a nut, and the mandrel is provided with an external thread structure and is in threaded fit with the nut. The limiting piece is a one-way thrust bearing. According to the utility model, the problem of matching failure of the headstock and the tuning peg caused by temperature and humidity can be solved.

Description

Technical Field

[0001] This utility model relates to components of a violin, and more particularly to a combined tuning peg with a self-locking function. Background Technology

[0002] The tuning pegs are located on the headstock of a violin and are used to secure the strings and tune the instrument. They are also called tuning pins, headstock pins, etc. Violin tuning pegs are mostly made of hardwood and typically have a taper of 1:25. They are self-locking by an interference fit with the headstock hole. When it is necessary to tighten or loosen the strings for tuning, the tuning peg is manually turned clockwise or counterclockwise. This applies a torque to overcome the frictional torque used for self-locking, thus driving the tuning peg to rotate. When the torque is removed, the tuning peg re-locks due to the interference fit with the headstock hole.

[0003] Under the influence of humidity and temperature, the headstock hole of a violin can deform after repeated adjustments of the tuning pegs, changing from a round hole to an elliptical hole or other non-round hole. This disrupts the interference fit between the tuning peg and the headstock hole, preventing self-locking and causing relative slippage, necessitating repair or scrapping. To address these shortcomings, mechanical tuning pegs based on planetary gear transmission principles have emerged on the market. However, compared to wooden tuning pegs, their structure is more complex and their manufacturing cost is higher. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a combined tuning pin with a self-locking function, which aims to solve the problem of failure of the fit between the headstock and the tuning pin due to temperature and humidity.

[0005] Technical Solution: To achieve the above objectives, this utility model provides a combined tuning peg with a self-locking function, comprising a core shaft with a bushing fitted on it; the core shaft passes through two opposing tuning peg holes on the headstock, the bushing and both tuning peg holes have a certain taper, and the bushing and the two tuning peg holes are interference-fitted; the two ends of the core shaft are respectively connected to a limiting member and an adjusting member, which are clamped on both sides of the headstock; the adjusting member can move along the core shaft, and when the adjusting member approaches the limiting member, it can push the bushing to adjust the interference fit between the bushing and the tuning peg hole.

[0006] Furthermore, the adjusting component is a nut, and the spindle has an external thread structure that engages with the nut thread.

[0007] Furthermore, a nut sleeve is provided outside the nut, and a pinching block is formed on the nut sleeve.

[0008] Furthermore, the limiting component is a one-way thrust bearing.

[0009] Furthermore, a bearing sleeve is provided outside the one-way thrust bearing, and the bearing sleeve is spaced between the headstock and the one-way thrust bearing.

[0010] Furthermore, the two opposing string shaft holes are divided into large conical holes and small conical holes according to their diameter, with the limiting member closer to the small conical hole and the adjusting member closer to the large conical hole.

[0011] Furthermore, the two ends of the bushing are a large-diameter end and a small-diameter end, respectively. The large-diameter end of the bushing extends out of the large tapered hole, and a knob is provided on the large-diameter end of the bushing.

[0012] Furthermore, the small-diameter end of the bushing is spaced apart from the limiting member.

[0013] Furthermore, the bushing is provided with an elastic mating surface, which is positioned opposite to the large tapered hole.

[0014] Furthermore, a silicone rubber sleeve is provided on the bushing, the outer contour surface of the silicone rubber sleeve is the elastic mating surface, and the length of the silicone rubber sleeve is greater than the length of the large conical hole.

[0015] Beneficial effects: The present invention provides a combined string pin with a self-locking function. The string pin consists of a core shaft and a bushing. The position of the bushing on the core shaft can be adjusted by a nut, thereby adjusting the interference fit between the bushing and the string pin hole to enhance the self-locking capability of the string pin. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram showing the connection between the tuning pegs and the headstock of the instrument.

[0017] Appendix Figure 2 This is a schematic diagram of the structure of the string axis. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] As attached Figures 1 to 2 The aforementioned combination tuning pin with a self-locking function includes a core shaft 1 and a bushing 2, with the bushing 2 fitted onto the core shaft 1. The core shaft 1 passes through two opposing tuning pin holes 13 on the violin headstock 3, as shown in the attached figure. Figure 2 As shown, both the bushing 2 and the two string pin holes 13 have a certain taper, typically 1:25. The bushing 2 and the two string pin holes 13 are interference-fitted, enabling the string pins to achieve self-locking fixation.

[0020] A limiting component and an adjusting component are connected to both ends of the spindle 1, respectively. These components are clamped on both sides of the headstock 3, and also on both sides of the bushing 2. The adjusting component can move along the spindle 1, changing its position on the spindle 1. When the adjusting component approaches the limiting component, it pushes against the bushing 2. Under this pushing force, the bushing 2 tightens its fit with the tuning peg hole 13. Therefore, changing the position of the adjusting component on the tuning peg adjusts the interference fit between the bushing 2 and the tuning peg hole 13. Thus, when the tuning peg loosens due to temperature and humidity after prolonged use, the bushing 2 can be adjusted to maintain a suitable interference fit.

[0021] Specifically, the adjusting component is a nut 4, and the spindle 1 has an external thread structure that engages with the nut 4. The nut 4 can be rotated and adjusted on the spindle 1. A nut sleeve 5 is provided outside the nut 4, and a pinch block 12 is formed on the nut sleeve 5. The pinch block 12 on the nut sleeve 5 allows the user to manually tighten or loosen the nut 4.

[0022] Specifically, the limiting component is a one-way thrust bearing 6, and a bearing sleeve 7 is provided outside the one-way thrust bearing 6, which is positioned between the headstock 3 and the one-way thrust bearing 6. The one-way thrust bearing 6 can prevent the nut 4 and the spindle 1 from loosening due to relative rotation during the adjustment of the violin's pitch by rotating the bushing 2. The bearing sleeve 7 is to prevent local surface scratches on the headstock 3 caused by the pressure from the one-way thrust bearing 6.

[0023] Specifically, as shown in the attached document Figure 2 As shown, the two opposing tuning peg holes 13 are divided into a large conical hole 8 and a small conical hole 9 according to their diameter. The limiting member is closer to the small conical hole 9, while the adjusting member is closer to the large conical hole 8. Correspondingly, the two ends of the bushing 2 are a large-diameter end and a small-diameter end, respectively. The large-diameter end is opposite to the large conical hole 8, and the small-diameter end is opposite to the small conical hole 9. The large-diameter end of the bushing 2 extends out of the large conical hole 8, and a knob 10 is provided on the large-diameter end of the bushing 2. The user can easily turn the bushing 2 by turning the knob 10 to adjust the pitch of the violin. The small-diameter end of the bushing 2 is spaced apart from the limiting member to leave a certain space allowance so that the bushing 2 can be tightened between the tuning peg hole 13 later.

[0024] Specifically, an elastic mating surface is also provided on the bushing 2, which is positioned opposite to the large tapered hole 8, further enhancing the self-locking capability of the chord shaft. In one embodiment, the bushing 2 is made of hardwood, and a silicone rubber sleeve 11 is provided on the bushing 2, with the outer contour surface of the silicone rubber sleeve 11 being the elastic mating surface. The length of the silicone rubber sleeve 11 is greater than the length of the large tapered hole 8, so even if there is a relative adjustment between the bushing 2 and the chord shaft hole 13, the outer contour of the silicone rubber sleeve 11 can still mate with the inner surface of the large tapered hole 8.

[0025] In operation, the combined tuning pins of this invention are inserted into two opposing tuning pin holes 13 on the violin headstock 3. The violin strings are connected to the pin sleeves 2. To adjust the violin's pitch, the pin sleeves 2 are rotated to tighten or loosen the strings. (See attached diagram) Figure 2 As shown, when the nut 4 is tightened through the nut sleeve 5, the bushing 2 and the silicone rubber sleeve 11 move to the left, increasing the interference fit with the tuning peg hole 13 on the headstock 3, achieving a tight fit. When the nut 4 is loosened through the nut sleeve 5, the interference fit is reduced, making the fit looser. If the fit loosens due to temperature and humidity after prolonged use, the nut 4 can be adjusted through the nut sleeve 5 to maintain a suitable interference fit.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A combined stringing shaft with a self-locking function, characterized in that: The instrument includes a spindle (1) with a bushing (2) fitted on it. The spindle (1) passes through two opposing tuning peg holes (13) on the headstock (3). The bushing (2) and the two tuning peg holes (13) have a certain taper and are interference-fitted. The two ends of the spindle (1) are connected to a limiting member and an adjusting member, which are clamped on both sides of the headstock (3). The adjusting member can move along the spindle (1). When the adjusting member is close to the limiting member, it can push the bushing (2) to adjust the interference fit between the bushing (2) and the tuning peg hole (13).

2. A combined stringing shaft with self-locking function according to claim 1, characterized in that: The adjusting component is a nut (4), and the spindle (1) has an external thread structure that is threaded into the nut (4).

3. A combined stringing shaft with self-locking function according to claim 2, characterized in that: A nut sleeve (5) is provided outside the nut (4), and a pinching block (12) is formed on the nut sleeve (5).

4. A combined stringing shaft with self-locking function according to claim 2, characterized in that: The limiting component is a one-way thrust bearing (6).

5. A combined stringing shaft with self-locking function according to claim 4, characterized in that: The one-way thrust bearing (6) is provided with a bearing sleeve (7), which is located between the headstock (3) and the one-way thrust bearing (6).

6. A combined stringing shaft with self-locking function according to claim 1, characterized in that: The two chord holes (13) are divided into a large conical hole (8) and a small conical hole (9) according to their diameter. The limiting member is closer to the small conical hole (9) and the adjusting member is closer to the large conical hole (8).

7. A combined stringing shaft with self-locking function according to claim 6, characterized in that: The bushing (2) has a large diameter end and a small diameter end at its two ends, respectively. The large diameter end of the bushing (2) extends out of the large tapered hole (8), and a knob (10) is provided on the large diameter end of the bushing (2).

8. A combined stringing shaft with self-locking function according to claim 7, characterized in that: The small-diameter end of the bushing (2) is spaced apart from the limiting member.

9. A combined stringing shaft with self-locking function according to claim 6, characterized in that: The bushing (2) is provided with an elastic mating surface, which is opposite to the position of the large tapered hole (8).

10. A combined stringing shaft with self-locking function according to claim 9, characterized in that: The bushing (2) is provided with a silicone rubber sleeve (11), the outer contour surface of the silicone rubber sleeve (11) is the elastic mating surface, and the length of the silicone rubber sleeve (11) is greater than the length of the large tapered hole (8).

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