Embedded linear bearing type unilateral translation clamping arm

Abstract

The utility model discloses an embedded linear bearing type unilateral translation clamping arm, which comprises a front clamping arm, a rear clamping arm, a pressing arm, a pull rod and a spring, an adjusting inner sleeve is arranged at the top of the front clamping arm, an adjusting limiting sleeve matched with the adjusting inner sleeve is arranged at the top of the rear clamping arm, the pull rod adopts a thread to adjust the pull rod, and the pressing arm is arranged in the adjusting limiting sleeve. One end of the threaded adjusting pull rod is connected to the pressing arm, the threaded adjusting pull rod is sleeved with the spring, a spring check ring matched with the spring is arranged in the adjusting inner sleeve, the other end of the threaded adjusting pull rod penetrates through the adjusting inner sleeve and the top of the front clamping arm and then is connected with an adjusting knob, and a plurality of balls are arranged between the adjusting inner sleeve and the adjusting limiting sleeve. The ball, the adjusting inner sleeve and the adjusting limiting sleeve form a linear bearing, and a plane bearing is arranged between the adjusting knob and the front clamping arm. The front clamping arm and the rear clamping arm are clamped and loosened in a translation mode, so that the upper clamping force and the lower clamping force of the front clamping arm and the rear clamping arm are kept consistent as far as possible, the adjusting precision is ensured, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to a guitar auxiliary tool, in particular to an embedded linear bearing type single-side translation clamping 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 fixed clamping capos have the following defects: the top of the front clamping arm and the top of the rear clamping arm are hingedly connected by a rotating fulcrum. This structure makes the upper clamping force greater than the lower clamping force when clamping, affecting its adjustment accuracy. Utility Model Content

[0004] In order to solve the defects and shortcomings in the above-mentioned prior art, the utility model provides a front clamping arm and a rear clamping arm connected by a linear bearing composed of an adjusting inner sleeve, an adjusting limit sleeve and a ball, and the translation of the adjusting inner sleeve is achieved by tightening the threaded adjusting pull rod and resetting the spring, so that the upper and lower clamping forces of the front clamping arm and the rear clamping arm are kept as consistent as possible, thereby ensuring the adjustment accuracy of the pitch, and having a wide range of applications. The utility model has an embedded linear bearing type single-sided translation clamping arm.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an embedded linear bearing type unilateral translation clamping arm, comprising a front clamping arm and a rear clamping arm that cooperate with each other, a clamping arm for clamping the two, a pull rod and a spring that cooperate with the clamping arm, the top of the front clamping arm is provided with an adjusting inner sleeve, the top of the rear clamping arm is provided with an adjusting limit sleeve that cooperates with the adjusting inner sleeve, the pull rod adopts a threaded adjusting pull rod, one end of the threaded adjusting pull rod is connected to the clamping arm, the spring is sleeved on the threaded adjusting pull rod, a spring retaining ring that cooperates with the spring is provided inside the adjusting inner sleeve, the other end of the threaded adjusting pull rod passes through the adjusting inner sleeve and the top of the front clamping arm and is connected to an adjusting knob, a plurality of balls are provided between the adjusting inner sleeve and the adjusting limit sleeve, the balls, the adjusting inner sleeve and the adjusting limit sleeve constitute a linear bearing, and a plane bearing is provided between the adjusting knob and the front clamping arm.

[0006] The utility model relates to a front clamping arm and a rear clamping arm connected by a linear bearing composed of an adjusting inner sleeve, an adjusting limit sleeve and a ball, and the translation of the adjusting inner sleeve is achieved by tightening a threaded adjusting pull rod and resetting a spring, so that the upper and lower clamping forces of the front clamping arm and the rear clamping arm are kept as consistent as possible, thereby ensuring the adjustment accuracy of the pitch, and having a wide range of applications.

[0007] Preferably, the adjusting knob comprises an integrally formed knob body and an internal threaded joint, the internal threaded joint is connected to a threaded adjusting rod, and the plane bearing is located between the knob body and the front clamping arm.

[0008] This structure facilitates the assembly of the adjusting knob and the threaded adjusting rod, ensuring the stability and reliability of the adjustment.

[0009] Preferably, the threaded adjustment rod includes an integrally formed external thread section and a smooth rod section, the other end of the external thread section is connected to an internal thread joint, the other end of the smooth rod section is connected to a clamping arm, and a connecting short rod matching the clamping arm is provided at the end of the smooth rod section, and a rod groove matching the smooth rod section and a cam head matching the connecting short rod are provided at the top of the clamping arm.

[0010] This structure ensures the assembly reliability of the threaded adjustment rod and the clamping arm, thereby ensuring the stability and reliability of the clamping arm pulling the threaded adjustment rod.

[0011] Preferably, a circular recess matching the internal thread joint and an arc-shaped notch matching the knob body are provided on the outer side of the top of the front clamping arm, and the outer side surface of the knob body is flush with the outer side surface of the front clamping arm at the position of the arc-shaped notch.

[0012] This structure makes it compact and beautiful in appearance.

[0013] Preferably, the cross-section of the adjusting inner sleeve is square, and ball grooves for matching balls are provided on the outer sides of the four corners. The cross-section of the adjusting limit sleeve is also square, and ball grooves for matching balls are provided on the inner sides of the four corners, and an arc chamfer is provided at the end of the adjusting inner sleeve.

[0014] This structure facilitates the assembly of the ball bearings and ensures that the adjusting inner sleeve moves smoothly and reliably inside the adjusting limit sleeve.

[0015] Preferably, a support block cooperating with the clamping arm is provided at the top of the rear clamping arm, and a cam groove cooperating with the clamping arm and a limit groove cooperating with the threaded adjustment rod are provided on the support block.

[0016] This structure further ensures the stability and reliability of the clamping arm pulling the threaded adjustment rod.

[0017] Preferably, a limiting end cover is provided at the end of the adjustment limit sleeve, and a clamping arm groove cooperating with the clamping arm is provided at the rear of the rear clamping arm. When the clamping arm is clamped, it is located in the clamping arm groove, and the outer side surface of the clamping arm is flush with the rear surface of the rear clamping arm.

[0018] This structure not only ensures good stability of the clamping arm when clamping, but also makes the entire product as small as possible while ensuring its aesthetics.

[0019] The utility model relates to a front clamping arm and a rear clamping arm connected by a linear bearing composed of an adjusting inner sleeve, an adjusting limit sleeve and a ball, and the translation of the adjusting inner sleeve is achieved by tightening a threaded adjusting pull rod and resetting a spring, so that the upper and lower clamping forces of the front clamping arm and the rear clamping arm are kept as consistent as possible, thereby ensuring the adjustment accuracy of the pitch, and having a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an explosion schematic diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the adjusting knob in the utility model.

[0023] Figure 4 It is a structural schematic diagram of the threaded adjustment rod in the utility model.

[0024] Figure 5 It is a structural schematic diagram of the support block in the utility model.

[0025] Figure 6 It is a structural schematic diagram of the rear clamping arm of the utility model.

[0026] Figure 7 It is a structural schematic diagram of the front clamping arm in the utility model.

[0027] In the figure: 1. front clamping arm, 2. rear clamping arm, 3. clamping arm, 4. spring, 5. adjusting inner sleeve, 6. adjusting limit sleeve, 7. threaded adjustment rod, 8. adjusting knob, 9. ball, 10. plane bearing, 11. knob body, 12. internal thread joint, 13. external thread section, 14. bare rod section, 15. connecting short rod, 16. circular concave, 17. arc notch, 18. ball groove, 19. arc chamfer, 20. ball groove, 21. support block, 22. limit end cover, 23. rod groove, 24. cam head, 25. cam groove, 26. limit groove, 27. clamping arm groove, 28. spring retaining ring. DETAILED DESCRIPTION

[0028] 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.

[0029] like Figure 1-7 As shown, an embedded linear bearing type single-sided translation clamping arm includes a front clamping arm 1 and a rear clamping arm 2 that cooperate with each other, a clamping arm 3 for clamping the two, a pull rod and a spring 4 that cooperate with the clamping arm 3, an adjusting inner sleeve 5 is provided on the top of the front clamping arm 1, and an adjusting limit sleeve 6 that cooperates with the adjusting inner sleeve 5 is provided on the top of the rear clamping arm 2. The pull rod adopts a threaded adjusting pull rod 7, one end of the threaded adjusting pull rod 7 is connected to the clamping arm 3, and the spring 4 is sleeved on the threaded adjusting pull rod 7. A spring retaining ring that cooperates with the spring 4 is provided inside the adjusting inner sleeve 5, and the other end of the threaded adjusting pull rod 7 passes through the adjusting inner sleeve 5 and the top of the front clamping arm 1 and is then connected to an adjusting knob 8. A plurality of balls 9 are provided between the adjusting inner sleeve 5 and the adjusting limit sleeve 6. The balls 9, the adjusting inner sleeve 5 and the adjusting limit sleeve 6 constitute a linear bearing, and a plane bearing 10 is provided between the adjusting knob 8 and the front clamping arm 1. The adjusting knob 8 includes an integrally formed knob body 11 and an internal thread joint 12, the internal thread joint 12 is connected to the threaded adjusting rod 7, and the plane bearing 10 is located between the knob body 11 and the front clamping arm 1. The threaded adjusting rod 7 includes an integrally formed external thread section 13 and a bare rod section 14, the other end of the external thread section 13 is connected to the internal thread joint 12, the other end of the bare rod section 14 is connected to the clamping arm 3, and a connecting short rod 15 matching the clamping arm 3 is provided at the end of the bare rod section 14, and a rod groove 23 matching the bare rod section 14 and a cam head 24 matching the connecting short rod 15 are provided at the top of the clamping arm 3. A circular concave 16 matching the internal thread joint 12 and an arc-shaped notch 17 matching the knob body 11 are provided on the outer side of the top of the front clamping arm 1, and the outer side surface of the knob body 11 is flush with the outer side surface of the front clamping arm 1 at the position of the arc-shaped notch 17. The cross section of the adjusting inner sleeve 5 is square, and the outer sides of the four corners are provided with ball grooves 18 for matching the ball 9. The cross section of the adjusting limit sleeve 6 is also square, and the inner sides of the four corners are provided with ball grooves 20 for matching the ball 9, and an arc chamfer 19 is provided at the end of the adjusting inner sleeve 5. A support block 21 for matching the clamping arm 3 is provided at the top of the rear clamping arm 2, and a cam groove 25 for matching the clamping arm 3 and a limit groove 26 for matching the threaded adjusting rod 7 are provided on the support block 21. A limit end cap 22 is provided at the end of the adjusting limit sleeve 6, and a clamping arm groove 27 for matching the clamping arm 3 is provided at the rear of the rear clamping arm 2. When the clamping arm 3 is clamped, it is located in the clamping arm groove 27, and the outer side surface of the clamping arm 3 is flush with the rear surface of the rear clamping arm 2.

[0030] When in use, the clamping arm is opened and clamped to the position where the guitar needs to be tuned, the clamping arm is pressed, and the adjusting knob and the front clamping arm are driven to translate toward the rear clamping arm through the threaded adjusting rod, so that the front clamping arm and the rear clamping arm are clamped on the guitar. At this time, the spring clamping is adjusted by the spring retaining ring inside the inner sleeve. Since the front clamping arm and the rear clamping arm are clamped by translation rather than by rotating the fulcrum, the upper and lower clamping forces of the front clamping arm and the rear clamping arm are kept as consistent as possible, thereby ensuring the adjustment accuracy of the pitch and having a wide range of applications. When loosening, the clamping arm is opened, and the adjusting knob is driven to translate toward the opposite direction of the rear clamping arm through the threaded adjusting rod. At this time, the spring is reset, which will push the front clamping arm to move in the opposite direction of the rear clamping arm to release the guitar.

[0031] The plane bearing in the utility model is a small-sized plane bearing purchased on the market, and its main function is to ensure that the rotation of the adjusting knob is smooth, stable and reliable.

[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 single-side translation clamping arm with an embedded linear bearing, comprising a front clamping arm and a rear clamping arm that cooperate with each other, a clamping arm for clamping the two, a pull rod and a spring that cooperate with the clamping arm, characterized in that: An adjusting inner sleeve is provided at the top of the front clamping arm, and an adjusting limit sleeve matching the adjusting inner sleeve is provided at the top of the rear clamping arm. The pull rod adopts a threaded adjusting pull rod, one end of the threaded adjusting pull rod is connected to the clamping arm, and the spring is sleeved on the threaded adjusting pull rod. A spring retaining ring matching the spring is provided inside the adjusting inner sleeve, and the other end of the threaded adjusting pull rod passes through the adjusting inner sleeve and the top of the front clamping arm and is connected to an adjusting knob. A plurality of balls are provided between the adjusting inner sleeve and the adjusting limit sleeve. The balls, the adjusting inner sleeve and the adjusting limit sleeve constitute a linear bearing, and a plane bearing is provided between the adjusting knob and the front clamping arm.

2. The built-in linear bearing single-side translation clamping arm according to claim 1, characterized in that: The adjusting knob comprises an integrally formed knob body and an internal thread joint, the internal thread joint is connected to a threaded adjusting pull rod, and the plane bearing is located between the knob body and the front clamping arm.

3. The built-in linear bearing type single-side translation clamping arm according to claim 2, characterized in that: The threaded adjustment pull rod includes an integrally formed external thread section and a smooth rod section, the other end of the external thread section is connected to an internal thread joint, the other end of the smooth rod section is connected to a clamping arm, and a connecting short rod matching the clamping arm is provided at the end of the smooth rod section, and a pull rod groove matching the smooth rod section and a cam head matching the connecting short rod are provided at the top of the clamping arm.

4. The built-in linear bearing type single-side translation clamping arm according to claim 2, characterized in that: The outer side of the top of the front clamping arm is provided with a circular concave matched with the internal thread joint and an arc-shaped notch matched with the knob body, and the outer side surface of the knob body is flush with the outer side surface of the front clamping arm at the position of the arc-shaped notch.

5. The built-in linear bearing type single-side translation clamping arm according to claim 1, characterized in that: The cross section of the adjusting inner sleeve is square, and ball grooves for matching balls are provided on the outer sides of the four corners. The cross section of the adjusting limit sleeve is also square, and ball grooves for matching balls are provided on the inner sides of the four corners, and an arc chamfer is provided at the end of the adjusting inner sleeve.

6. The built-in linear bearing type single-side translation clamping arm according to claim 3, characterized in that: A support block matching the clamping arm is provided on the top of the rear clamping arm, and a cam groove matching the clamping arm and a limit groove matching the threaded adjustment rod are provided on the support block.

7. The built-in linear bearing type single-side translation clamping arm according to claim 2, characterized in that: The end of the adjustment limit sleeve is provided with a limit end cover, and the rear of the rear clamping arm is provided with a clamping arm groove that matches the clamping arm. The clamping arm is located in the clamping arm groove when clamping, and the outer side surface of the clamping arm is flush with the rear surface of the rear clamping arm.

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