Hidden cam shaft folding arm

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Through the clamping structure of the front and rear folding arms, the existing variable adjusting clamp operation problems and large size are solved, and the compact and beautiful hidden camshaft folding arms are realized, which improves the convenience and appearance quality of guitar tuning.

CN222337897UActive Publication Date: 2025-01-10茹侃俊

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Patent Information

Application Number: CN202420906446.X
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-28
Publication Date: 2025-01-10
Estimated Expiration: 2034-04-28

AI Technical Summary

Technical Problem

The existing sliding clamp type variable adjusting clamps are complicated due to the complex structure and the clamping arm being exposed to the outside, which leads to troublesome operation and large size, which affects the aesthetics.

Method used

The front and rear folding arms are used to clamp the clamping arms. The front pressing arm can be placed outside the front clamping arm, and the rear pressing arm can be embedded in the rear clamping arm, through the hinge shaft, clamping spring and damping ring. The structure realizes the convenience of folding operation and volume compression.

Benefits of technology

It realizes the convenience of clamping operation and the overall compact and beautiful design, ensuring the stability of clamping effect and the aesthetics of the product.

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Abstract

The utility model discloses a hidden type cam shaft folding arm which comprises a front clamping arm, a rear clamping arm, a front pressing arm installed on the front clamping arm, a rear pressing arm installed on the rear clamping arm, a clamping spring and a hinge shaft, the clamping spring and the hinge shaft are matched with the front clamping arm and the rear clamping arm, and the top of the front pressing arm is rotationally connected to the top of the front clamping arm. The top of the rear pressing arm is rotationally connected to the middle of the rear clamping arm, the front clamping arm is sleeved with the front pressing arm when the front pressing arm is folded, the width of the single edge of the front pressing arm is matched with the width of the side edge of the front clamping arm, the rear pressing arm is embedded in the rear clamping arm when the rear pressing arm is folded, a limiting protrusion is arranged at the top of the front pressing arm, and a limiting cam head is arranged at the top of the rear pressing arm. The front folding arm and the rear folding arm are matched with the front clamping arm and the rear clamping arm for clamping, the folding operation is convenient and reliable, the front pressing arm can be sleeved outside the front clamping arm, and the rear pressing arm can be embedded into the rear clamping arm, so that the whole tuning clamp can keep small volume as much as possible, and the appearance is attractive and elegant.

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Description

Technical Field

[0001] The utility model relates to a guitar auxiliary tool, in particular to a hidden camshaft folding arm. Background Art

[0002] The original purpose of the capo was to adjust the pitch of the guitar. It is a common auxiliary tool in folk guitar playing and singing. When changing the key, it can press the existing fret to raise the tune to a corresponding interval, so that it can be coordinated with the singer's voice. The original fingering method is used to play, which greatly reduces the difficulty of changing the key. It is widely used in the performance of flamenco guitar, classical guitar and folk guitar. When used for solo repertoire, the capo is often placed between the first and fourth frets, among which the second fret has the highest frequency, and the use above the fourth fret is basically only seen in accompaniment.

[0003] Existing capos are roughly divided into two categories, one is fixed clamping, and the other is slidable clamping. Existing sliding clamping capos have the following defects: since they are equipped with rollers, they generally have more parts and a more complicated structure. On the one hand, the clamping operation is more troublesome, and on the other hand, after clamping, the pressing arm is exposed to the outside, resulting in a larger volume of the entire tuning clamp, affecting the aesthetics. Utility Model Content

[0004] In order to solve the defects and shortcomings in the above-mentioned prior art, the utility model provides a hidden camshaft folding arm which adopts front and rear two folding arms to cooperate with front and rear clamping arms for clamping. On the one hand, the folding operation is convenient and reliable, and on the other hand, the front pressing arm can be sleeved outside the front clamping arm, and the rear pressing arm can be embedded in the rear clamping arm, so that the entire tuning clamp can keep the volume as small as possible, and the appearance is beautiful and generous.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hidden camshaft folding arm, comprising a front clamping arm, a rear clamping arm, a front pressing arm installed on the front clamping arm and a rear pressing arm installed on the rear clamping arm, and a clamping spring and a hinge shaft matching the front clamping arm and the rear clamping arm, the top of the front pressing arm is rotatably connected to the top of the front clamping arm, the top of the rear pressing arm is rotatably connected to the middle part of the rear clamping arm, the front pressing arm is sleeved outside the front clamping arm when folded, and the single-side width of the front pressing arm matches the side width of the front clamping arm, the rear pressing arm is embedded in the rear clamping arm when folded, the top of the front pressing arm is provided with a limiting protrusion, and the top of the rear pressing arm is provided with a limiting cam head.

[0006] The utility model adopts front and rear two folding arms to cooperate with front and rear clamping arms for clamping. On the one hand, the folding operation is convenient and reliable. On the other hand, the front pressing arm can be sleeved outside the front clamping arm, and the rear pressing arm can be embedded in the rear clamping arm, so that the entire tuning clip can keep the volume as small as possible and the appearance is beautiful and generous.

[0007] Preferably, the top of the front pressing arm is rotatably connected to the hinge shaft of the front clamping arm and the rear clamping arm through a hinge lug, the top of the rear clamping arm is sleeved on the outer side of the top of the front clamping arm, the top of the front pressing arm is sleeved on the outer side of the top of the rear clamping arm, the limiting protrusion is located on the hinge lug, and the rear clamping arm is provided with a limiting protrusion that cooperates with the limiting protrusion.

[0008] This structure ensures that the rotation and opening position (limited by the limiting protrusion and the limiting block) of the front pressing arm are stable and reliable, thereby ensuring the clamping effect.

[0009] Preferably, a first damping ring is provided between the hinged lug and the rear clamping arm, a limiting plate is provided at the bottom of the front pressing arm, and a limiting inner recess matching the limiting plate and a limiting convex strip matching the bottom ring of the front pressing arm are provided at the bottom of the front clamping arm.

[0010] This structure causes the front pressing arm to be subjected to a certain damping force during the rotation process, so that it will not be in hard contact with other parts and cause wear during the opening and folding process. In addition, it will be well limited when it is completely folded (by limiting the position of the limiting plate, the limiting concave and the limiting convex strip).

[0011] Preferably, the upper part of the rear clamping arm is inclined, the lower part of the rear clamping arm is vertically arranged, the limiting cam head is rotatably connected to the middle bend of the rear clamping arm through a cam shaft, and the rear clamping arm is provided with a cam limiting groove that cooperates with the limiting cam head.

[0012] This structure further facilitates the limiting of the rear pressing arm by the rear clamping arm.

[0013] Preferably, a rear pressing arm mounting groove cooperating with the rear pressing arm is provided on the back side of the rear clamping arm, and the depth of the rear pressing arm mounting groove is less than or equal to the thickness of the rear pressing arm.

[0014] This structure further facilitates the installation of the rear clamping arm to the rear pressing arm.

[0015] Preferably, the bottom of the rear clamping arm and the bottom of the rear pressing arm are provided with mutually cooperating magnetic suction components, and the two sides of the limiting cam head and the second damping ring are connected to the cam shaft.

[0016] This structure causes the rear pressing arm to be subjected to a certain damping force during the rotation process, so that it will not be in hard contact with other parts and cause wear during the opening and folding process. In addition, it will be well limited when it is completely folded (magnetic suction component).

[0017] Preferably, first damping ring limiting grooves matching the first damping ring are provided on both sides of the top of the rear clamping arm, and second damping ring limiting grooves matching the second damping ring are provided on both sides of the limiting cam head.

[0018] This structure ensures the damping effect during the rotation of the front pressing arm and the rear pressing arm.

[0019] Preferably, the first damping ring and the second damping ring are both made of rubber material.

[0020] Preferably, a limit head is provided at one end of the hinge shaft, an internal thread matching the limit bolt head is provided at the other end of the hinge shaft, and a cover plate matching the hinge shaft and a cover plate limit groove matching the cover plate are provided on the outer side of the hinge lug.

[0021] This structure ensures the stability and reliability of the connection between the top of the front clamping arm, the top of the rear clamping arm and the top of the front pressing arm.

[0022] The utility model adopts front and rear two folding arms to cooperate with front and rear clamping arms for clamping. On the one hand, the folding operation is convenient and reliable. On the other hand, the front pressing arm can be sleeved outside the front clamping arm, and the rear pressing arm can be embedded in the rear clamping arm, so that the entire tuning clip can keep the volume as small as possible and the appearance is beautiful and generous. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an explosion schematic diagram of the utility model.

[0024] Figure 2 It is a structural schematic diagram of one angle of the utility model.

[0025] Figure 3 It is a structural schematic diagram of the utility model from another angle.

[0026] Figure 4 It is a structural schematic diagram of the rear clamping arm of the utility model.

[0027] Figure 5 It is an exploded schematic diagram of the articulated shaft in the utility model.

[0028] In the figure: 1. front clamping arm, 2. rear clamping arm, 3. front pressing arm, 4. rear pressing arm, 5. clamping spring, 6. hinge shaft, 7. limiting protrusion, 8. limiting cam head, 9. hinge lug, 10. limiting convex block, 11. first damping ring, 12. second damping ring, 13. limiting plate, 14. limiting concave, 15. limiting convex strip, 16. cam shaft, 17. cam limiting groove, 18. rear pressing arm mounting groove, 19. magnetic suction assembly, 20. cover plate, 21. first damping ring limiting groove, 22. second damping ring limiting groove, 23. cover plate limiting groove, 24. limiting head, 25. limiting bolt head. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0030] like Figure 1-5 As shown, a hidden camshaft folding arm comprises a front clamping arm 1, a rear clamping arm 2, a front pressing arm 3 installed on the front clamping arm 1 and a rear pressing arm 4 installed on the rear clamping arm 2, and a hinge shaft 6 and a clamping spring 5 matching the front clamping arm 1 and the rear clamping arm 2. The top of the front pressing arm 3 is rotatably connected to the top of the front clamping arm 1, and the top of the rear pressing arm 4 is rotatably connected to the middle of the rear clamping arm 2. When the front pressing arm 3 is folded, it is sleeved outside the front clamping arm 1, and the single-side width of the front pressing arm 3 matches the side width of the front clamping arm 1. When the rear pressing arm 4 is folded, it is embedded in the rear clamping arm 2. A limiting protrusion 7 is provided on the top of the front pressing arm 3, and a limiting cam head 8 is provided on the top of the rear pressing arm 4. The top of the front pressing arm 3 is rotatably connected to the hinge shaft 6 of the front clamping arm 1 and the rear clamping arm 2 through the hinge lug 9, the top of the rear clamping arm 2 is sleeved on the outside of the top of the front clamping arm 1, the top of the front pressing arm 3 is sleeved on the outside of the top of the rear clamping arm 2, the limiting protrusion 7 is located on the hinge lug 9, and the rear clamping arm 2 is provided with a limiting protrusion 10 that matches the limiting protrusion 7. A first damping ring 11 is provided between the hinge lug 9 and the top of the rear clamping arm 2, a limiting sheet 13 is provided at the bottom of the front pressing arm 3, and a limiting concave 14 that matches the limiting sheet 13 and a limiting convex strip 15 that matches the bottom circle of the front pressing arm 3 are provided at the bottom of the front clamping arm 1. The upper part of the rear clamping arm 2 is inclined, and the lower part of the rear clamping arm 2 is vertically arranged. The limiting cam head 8 is rotatably connected to the middle bend of the rear clamping arm 2 through a cam shaft 16. The rear clamping arm 2 is provided with a cam limiting groove 17 that matches the limiting cam head 8. The back of the rear clamping arm 2 is provided with a rear pressing arm mounting groove 18 that matches the rear pressing arm 4, and the depth of the rear pressing arm mounting groove 18 is less than the thickness of the rear pressing arm 4. The bottom of the rear clamping arm 2 and the bottom of the rear pressing arm 4 are provided with a mutually matching magnetic suction component 19, and the two sides of the limiting cam head 17 and the second damping ring 12 are connected at the cam shaft 16. The top of the rear clamping arm 2 is provided with a first damping ring limiting groove 21 that matches the first damping ring 11, and the two sides of the limiting cam head 8 are provided with a second damping ring limiting groove 22 that matches the second damping ring 12. The first damping ring 11 and the second damping ring 12 are both made of rubber material. A limit head 24 is provided at one end of the hinge shaft 6, a limit bolt head 25 and an internal thread matching the limit bolt head 25 are provided at the other end of the hinge shaft 6, and a cover plate 20 matching the hinge shaft 6 and a cover plate limit groove 23 matching the cover plate 20 are provided on the outer side of the hinge lug 9.

[0031] When the utility model is folded, the front clamping arm and the rear clamping arm are in a clamping state under the action of the clamping spring, and the front pressing arm is sleeved outside the front clamping arm, and the rear pressing arm is embedded in the rear clamping arm, which is basically hidden, and the volume of the product can be greatly reduced; when it is needed to be used, the front pressing arm and the rear pressing arm are opened, and after the front pressing arm is flipped to a certain angle, the limiting protrusion is blocked by the limiting protrusion, and after the rear pressing arm is rotated to a certain angle, the limiting cam head is limited by the cam limiting groove, and at this time, the front clamping arm and the rear clamping arm are pressed and slightly forced at the same time to compress the clamping spring, so that the front clamping arm and the rear clamping arm can be opened, and after the tuning clip is placed at the specified position of the guitar, the front pressing arm and the rear pressing arm are released, the clamping spring is reset, and the front clamping arm and the rear clamping arm clamp the specified position of the guitar.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hidden camshaft folding arm, characterized in that: It includes a front clamping arm, a rear clamping arm, a front pressing arm installed on the front clamping arm, a rear pressing arm installed on the rear clamping arm, and a hinge shaft and a clamping spring that cooperate with the front clamping arm and the rear clamping arm. The top of the front pressing arm is rotatably connected to the top of the front clamping arm, and the top of the rear pressing arm is rotatably connected to the middle part of the rear clamping arm. When the front pressing arm is folded, it is sleeved outside the front clamping arm, and the single-side width of the front pressing arm matches the side width of the front clamping arm. When the rear pressing arm is folded, it is embedded in the rear clamping arm. A limiting protrusion is provided on the top of the front pressing arm, and a limiting cam head is provided on the top of the rear pressing arm.

2. The hidden camshaft folding arm according to claim 1, characterized in that: The top of the front pressing arm is rotatably connected to the hinge shaft of the front clamping arm and the rear clamping arm through a hinge lug, the top of the rear clamping arm is sleeved on the outside of the top of the front clamping arm, the top of the front pressing arm is sleeved on the outside of the top of the rear clamping arm, the limiting protrusion is located on the hinge lug, and the rear clamping arm is provided with a limiting protrusion that cooperates with the limiting protrusion.

3. The hidden camshaft folding arm according to claim 2, characterized in that: A first damping ring is arranged between the hinged lug and the top of the rear clamping arm, a limiting plate is arranged at the bottom of the front pressing arm, and a limiting inner recess matching the limiting plate and a limiting convex strip matching the bottom ring of the front pressing arm are arranged at the bottom of the front clamping arm.

4. The hidden camshaft folding arm according to claim 3, characterized in that: The upper part of the rear clamping arm is inclined, the lower part of the rear clamping arm is vertically arranged, the limiting cam head is rotatably connected to the middle bending part of the rear clamping arm through a cam shaft, and the rear clamping arm is provided with a cam limiting groove matching the limiting cam head.

5. The hidden camshaft folding arm according to claim 4, characterized in that: A rear pressing arm mounting groove matching the rear pressing arm is provided on the back of the rear clamping arm, and the depth of the rear pressing arm mounting groove is less than or equal to the thickness of the rear pressing arm.

6. The hidden camshaft folding arm according to claim 4, characterized in that: The bottom of the rear clamping arm and the bottom of the rear pressing arm are provided with mutually matching magnetic suction components, and the two sides of the limiting cam head and the second damping ring are connected to the cam shaft.

7. The hidden camshaft folding arm according to claim 6, characterized in that: The top two sides of the rear clamping arm are provided with first damping ring limiting grooves matching the first damping ring, and the two sides of the limiting cam head are provided with second damping ring limiting grooves matching the second damping ring.

8. The hidden camshaft folding arm according to claim 7, characterized in that: The first damping ring and the second damping ring are both made of rubber material.

9. The hidden camshaft folding arm according to claim 3, characterized in that: A limit head is provided at one end of the hinge shaft, a limit bolt head and an internal thread matching the limit bolt head are provided at the other end of the hinge shaft, and a cover plate matching the hinge shaft and a cover plate limit groove matching the cover plate are provided on the outer side of the hinge lug.