Steel string unwinding device

Abstract

The utility model belongs to the technical field of pianos, and particularly relates to a string wire unwinding device which comprises a base, the base comprises a fixed disc, the top of the fixed disc is rotatably connected with a rotary disc, a chassis is placed on the upper end face of the rotary disc, the center of the inner side of the chassis is connected with a center piece, and the top of the center piece is provided with a wire guiding mechanism. The wire guiding mechanism comprises a positioning column rotationally connected to the top end of the center piece, and a wire guiding frame is rotationally connected to the positioning column; a protective cover is inserted into the base plate, the protective cover is in a circular truncated cone shape with an opening in the bottom end, a wire outlet pipe is fixedly connected to the top of the protective cover, and the wire outlet pipe and the protective cover are communicated with each other. Through the arrangement of the base and the rotating disc, the steel string coil is placed more stably; the base plate is placed on the rotating disc, the rotating disc is connected with the bearing seat through the bearing column, stable rotation of the rotating disc is achieved, and the problems of steel string loosening and knotting caused by inclination or movement of a steel string roll in a traditional unwinding device are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pianos, and in particular relates to a steel string unwinding device. Background Art

[0002] In pianos, steel strings (referred to as steel strings) are a common type of strings; in the production and use of steel strings, the unwinding of steel string rolls is a key link. Traditional steel string unwinding equipment usually has some technical problems, which affects the efficiency of the unwinding process and the quality of the steel strings.

[0003] Existing steel string unwinding devices are often simple in structure and lack effective fixing and guiding mechanisms, which makes the steel strings easy to loosen during the unwinding process. Excessive looseness of the steel string roll will not only increase the friction between the steel strings, easily causing surface damage to the steel strings, but may also cause the steel strings to become knotted during the pulling process, thus affecting the normal use of the steel strings. In this case, the unwinding operation of the steel strings requires frequent manual intervention, which not only increases the complexity of the operation, but also reduces work efficiency. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a steel string unwinding device, which can ensure the stability of the steel string roll during the unwinding process, avoid the problem of loose steel strings and knots, thereby improving the unwinding efficiency and steel string quality.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A steel string unwinding device comprises a base, the base comprises a fixed disk, the top of the fixed disk is rotatably connected to a turntable, the upper end surface of the turntable is provided with a bottom plate, the center of the inner side of the bottom plate is connected to a center piece, and the top of the center piece is provided with a wire guide mechanism;

[0007] The wire mechanism comprises a positioning column screwed to the top of the center piece, and a lead frame is rotatably connected to the positioning column;

[0008] A protective cover is plugged into the chassis, and the shape of the protective cover is set to be a truncated cone with an open bottom end.

[0009] The top of the protective cover is fixedly connected with an outlet pipe, and the outlet pipe and the protective cover are interconnected.

[0010] Furthermore, a bearing column is fixedly connected to the top of the fixed disk, a bearing seat is fixedly connected to the bottom of the rotating disk, and a bearing is arranged between the bearing column and the bearing seat.

[0011] Furthermore, a retaining ring is fixedly connected to the top of the turntable. The bottom of the chassis is inserted into the retaining ring, and a threaded post is fixedly connected to the center of the inner side of the chassis. The bottom of the central member is screwed onto the threaded post.

[0012] Furthermore, a limiting ring is fixedly connected to the outer side of the chassis.

[0013] Furthermore, a threaded hole is formed in the top of the central member. The bottom of the positioning post is connected to the threaded hole, and a retaining piece is fixedly connected to the outer side of the positioning post. A nut is connected to the top of the positioning post;

[0014] The lead frame includes a top frame. A sleeve is fixedly connected to the bottom of the top frame. The sleeve is sleeved on the positioning post.

[0015] Furthermore, the shape of the top frame is set as a C shape, and a first wire threading ring is arranged on the top of the top frame. One end of the bottom of the top frame is fixedly connected with an inclined plate, and a second wire threading ring is arranged at one end of the inclined plate.

[0016] Furthermore, a protective ring is arranged at the top edge of the wire outlet pipe.

[0017] Furthermore, feet are arranged at equal intervals around the central axis at the bottom of the fixed disk.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] First of all, through the settings of the base and the turntable, the placement of the steel string coil is more stable. The chassis is placed on the turntable. The turntable is connected through the bearing column and the bearing seat, realizing the smooth rotation of the turntable, and avoiding the problems of steel string loosening and knotting caused by the inclination or movement of the steel string coil in the traditional unwinding device.

[0020] Secondly, the design of the central member and the wire guiding mechanism effectively prevents the steel string from being overly loose during the unwinding process. The central member is firmly connected to the chassis through the threaded post. The lead frame guides the steel string through the rotation of the positioning post, avoiding the increase in friction and damage caused by the excessive loosening of the steel string coil. This structural design enables the steel string to maintain an appropriate tightness during the unwinding process, ensuring the smoothness of the unwinding operation.

[0021] Moreover, the settings of the protective cover and the wire outlet pipe further improve the stability and safety of the unwinding process. The protective cover is fixed on the chassis through the limiting ring, preventing it from shifting during the unwinding process; the wire outlet pipe communicates with the protective cover and is provided with a protective ring at the top, effectively protecting the steel string from being damaged when passing through the wire outlet pipe. This design ensures the smooth release of the steel string and avoids the occurrence of knotting and damage problems.

[0022] In addition, the design of the retaining ring and the limiting ring enhances the fixing effect of the chassis and the protective cover. The setting of the retaining ring makes the chassis more stable on the turntable, and the limiting ring prevents the accidental displacement of the protective cover, thereby ensuring the operational stability of the entire unwinding device. This design not only improves the convenience of operation, but also reduces the need for manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the base of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the chassis of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the center piece of the utility model;

[0027] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0028] Figure 6 It is a structural schematic diagram of the protective cover of the utility model.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Base;

[0031] 11. Fixed plate; 111. Foot pad; 112. Bearing column;

[0032] 12. Turntable; 121. Bearing seat; 122. Retaining ring;

[0033] 2. chassis; 21. threaded column; 22. limiting ring;

[0034] 3. Center piece; 31. Threaded hole;

[0035] 4. Conductor mechanism;

[0036] 41. lead frame; 411. top frame; 412. sleeve; 413. first threading ring; 414. inclined plate; 415. second threading ring;

[0037] 42, positioning column; 421, blocking piece; 422, nut;

[0038] 5. Protective cover; 51. Wire outlet pipe; 511. Protective ring. DETAILED DESCRIPTION

[0039] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0040] See also Figure 1-6 A steel string unwinding device comprises a base 1, the base 1 comprises a fixed disk 11, the top of the fixed disk 11 is rotatably connected to a turntable 12, and a chassis 2 is placed on the upper end surface of the turntable 12; a center piece 3 is connected to the inner center of the chassis 2, and a wire mechanism 4 is arranged on the top of the center piece 3; the wire mechanism 4 comprises a positioning column 42 screwed to the top of the center piece 3, and a lead frame 41 is rotatably connected to the positioning column 42; the lead frame 41 can effectively prevent the steel string from being excessively loose during the unwinding process through the rotation of the positioning column 42; a protective cover 5 is plugged into the chassis 2, and the shape of the protective cover 5 is set to be a truncated cone with an opening at the bottom end, and the bottom of the protective cover 5 is engaged with the chassis 2 to ensure a stable connection between the protective cover 5 and the chassis 2; a wire outlet pipe 51 is fixedly connected to the top of the protective cover 5, and the wire outlet pipe 51 and the protective cover 5 are mutually connected; through this structural setting, the problem of knotting of the steel string during the unwinding process is prevented, and the smooth operation of unwinding the steel string is guaranteed.

[0041] See also Figure 2 A bearing column 112 is fixedly connected to the top of the fixed disk 11, and the bearing column 112 provides the axis of rotation of the turntable 12; a bearing seat 121 is fixedly connected to the bottom of the turntable 12, and the bearing seat 121 is connected to the bearing column 112 through a bearing; the setting of the bearing can make the turntable 12 rotate smoothly, ensuring the operating stability of the unwinding device.

[0042] See also Figure 3-4 A retaining ring 122 is fixedly connected to the top of the turntable 12, and the inner side of the retaining ring 122 contacts the outer side of the chassis 2, making the chassis 2 more stable during placement; the bottom of the chassis 2 is inserted into the retaining ring 122, and a threaded column 21 is fixedly connected to the inner center of the chassis 2, and the bottom of the center piece 3 is screwed on the threaded column 21; this structure can stably fix the center piece 3 on the chassis 2, thereby ensuring the stable placement of the steel string roll.

[0043] See also Figure 3 The outer side of the chassis 2 is fixedly connected with a limiting ring 22, and the limiting ring 22 abuts against the lower end surface of the protective cover 5, further enhancing the stability of the protective cover 5 and preventing it from being displaced during the unwinding process.

[0044] See also Figure 4-5, a threaded hole 31 is provided at the top of the central member 3, and the bottom of the positioning post 42 is connected to the threaded hole 31 to ensure the stability of the positioning post 42 through threaded connection; a retaining piece 421 is fixedly connected to the outside of the positioning post 42, and the retaining piece 421 can effectively prevent the accidental detachment of the positioning post 42; a nut 422 is connected to the top of the positioning post 42, and the nut 422 plays a role in fixing and adjusting the height of the positioning post 42; the lead frame 41 includes a top frame 411, and a sleeve 412 is fixedly connected to the bottom of the top frame 411. The sleeve 412 is sleeved on the positioning post 42. Through this structural arrangement, the lead frame 41 can rotate freely on the positioning post 42, avoiding excessive loosening and knotting of the steel string coil.

[0045] Refer to Figure 5 , the shape of the top frame 411 is set as a U-shaped, and the U-shaped structure helps to stabilize the lead frame 41; a first wire threading loop 413 is provided at the top of the top frame 411, and the first wire threading loop 413 is used to guide the release direction of the steel string; one end of the bottom of the top frame 411 is fixedly connected with an inclined plate 414, and a second wire threading loop 415 is provided at one end of the inclined plate 414. The second wire threading loop 415 further guides the steel string, enabling the steel string to smoothly pass through the unwinding device.

[0046] Refer to Figure 5 , a protective ring 511 is provided at the top edge of the wire outlet pipe 51, and the protective ring 511 can effectively protect the edge of the wire outlet pipe 51, preventing the steel string from being damaged when passing through the wire outlet pipe 51.

[0047] Refer to Figure 2 , foot pads 111 are equidistantly arranged at the bottom of the fixed disk 11 around its central axis. The foot pads 111 provide the supporting force for the fixed disk 11, enabling the unwinding device to be stably placed on the ground and avoiding sliding during use.

[0048] The working principle of the present utility model is as follows:

[0049] During use, place the steel string coil in the chassis 2, and let the central member 3 pass through the center of the steel string coil. After the steel string coil is placed stably, then pass the free end of the steel string coil through the second wire threading loop 415, the first wire threading loop 413 and the wire outlet pipe 51 in sequence. At the same time, snap the bottom of the protective cover 5 onto the chassis 2. When connecting the protective cover 5 and the chassis 2, make the lower end face of the protective cover 5 abut against the limiting ring 22. Then place the chassis 2 on the turntable 12. When placing the chassis 2, make the inner side surface of the retaining ring 122 contact with the outer side surface of the chassis 2, so that the placement of the chassis 2 is more stable.

[0050] When the steel string is pulled out, when the steel string is separated from the steel string roll, the steel string will drive the lead frame 41 to rotate on the positioning column 42, and the setting of the lead frame 41 can prevent the steel string roll from being too loose during the pulling process, because the excessively loose steel strings will not only increase the friction between each other, causing the steel strings to be damaged during the unwinding process, but also the excessively loose steel strings will easily become knotted during the pulling process, which will affect the normal unwinding operation of the steel string.

[0051] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A steel string unwinding device, comprising a base (1), characterized in that: The base (1) includes a fixed disk (11). A turntable (12) is rotatably connected to the top of the fixed disk (11). A chassis (2) is placed on the upper end surface of the turntable (12). A central member (3) is connected to the center of the inner side of the chassis (2). A wire guiding mechanism (4) is arranged on the top of the central member (3). The wire guiding mechanism (4) includes a positioning column (42) rotatably connected to the top end of the central member (3). A lead frame (41) is rotatably connected to the positioning column (42). A protective cover (5) is inserted into the chassis (2). The shape of the protective cover (5) is a frustum of a cone with an open bottom end. A wire outlet pipe (51) is fixedly connected to the top of the protective cover (5), and the wire outlet pipe (51) communicates with the protective cover (5).

2. A steel string unwinding device according to claim 1, characterized in that: A bearing column (112) is fixedly connected to the top of the fixed disk (11). A bearing seat (121) is fixedly connected to the bottom of the turntable (12). A bearing is arranged between the bearing column (112) and the bearing seat (121).

3. A steel string unwinding device according to claim 1, characterized in that: A retaining ring (122) is fixedly connected to the top of the turntable (12). The bottom of the chassis (2) is inserted into the retaining ring (122). A threaded column (21) is fixedly connected to the center of the inner side of the chassis (2). The bottom of the central member (3) is screwed onto the threaded column (21).

4. A steel string unwinding device according to claim 1, characterized in that: A limiting ring (22) is fixedly connected to the outer side of the chassis (2).

5. A steel string unwinding device according to claim 1, characterized in that: A threaded hole (31) is formed in the top of the central member (3). The bottom of the positioning column (42) is connected to the threaded hole (31). A retaining piece (421) is fixedly connected to the outer side of the positioning column (42). A nut (422) is connected to the top of the positioning column (42). The lead frame (41) includes a top frame (411). A sleeve (412) is fixedly connected to the bottom of the top frame (411). The sleeve (412) is sleeved on the positioning column (42).

6. A steel string unwinding device according to claim 5, characterized in that: The shape of the top frame (411) is U-shaped. A first wire threading ring (413) is arranged on the top of the top frame (411). An inclined plate (414) is fixedly connected to one end of the bottom of the top frame (411). A second wire threading ring (415) is arranged at one end of the inclined plate (414).

7. A steel string unwinding device according to claim 1, characterized in that: A protective ring (511) is arranged at the top edge of the wire outlet pipe (51).

8. A steel string unwinding device according to claim 1, characterized in that: Foot pads (111) are arranged at equal intervals around the central axis at the bottom of the fixed disk (11).

Images