Wind instrument key fixing jig

Abstract

This utility model belongs to the field of musical instrument manufacturing technology, specifically relating to a key fixing fixture for wind instruments. It includes a fixture body with a processing section and a fastening section joined together. A contoured clamping groove is formed on the top surface of the processing section. A linearly movable fastening block is provided in the fastening section. One end of the fastening block abuts against the processing section, changing the volume of the contoured clamping groove. A pneumatic pump linearly drives the fastening block, causing one end to abut against a spring-loaded clamping plate, forcing the spring-loaded clamping plate closer to a fixed clamping plate, thus reducing the volume within the contoured clamping groove. The sidewall of the contoured clamping groove clamps and fixes the key, achieving secure and quick assembly / disassembly of the instrument key. Simultaneously, the compressive force applied to the spring-loaded clamping plate occurs at one end, allowing the key to abut against the other end of the contoured clamping groove, unifying the key abutment reference position and improving the accuracy of multiple machining operations.

Description

Technical Field

[0001] This utility model belongs to the field of musical instrument manufacturing technology, specifically relating to a key fixing fixture for wind instruments. Background Technology

[0002] The key system of wind instruments is the key mechanism for controlling pitch and timbre. Depending on the type of instrument, the key structure and function vary. Pitch is primarily adjusted by changing the length of the pipe, with the key system playing a crucial role. Modern brass instruments use metal linkages and universal joints in their key systems, improving structural stability and key response speed, reducing intonation problems caused by wear, and featuring a more ergonomic key layout that enhances playing comfort and flexibility.

[0003] A button processing fixture disclosed in patent CN209394347U includes a base, a support rod on the base, a processing table on the support rod and having a vacuum chamber, a vacuum tube communicating with the vacuum chamber, and a vacuum pump connected to the vacuum tube. A vacuum hole is formed on the surface of the processing table away from the support rod, and the vacuum hole communicates with the vacuum chamber. A sheet is placed on the processing table at the location of the vacuum hole. The vacuum pump is turned on and draws a vacuum into the vacuum chamber through the vacuum tube. At this time, a pressure difference is formed between the side of the sheet near the vacuum hole and the side away from the vacuum hole. The pressure on the side of the sheet away from the vacuum hole presses and fixes the sheet on the processing table for subsequent CNC machining. Because a vacuum adsorption method is used, sheets of different sizes can be pressed and positioned on the processing table, achieving the versatility of the button processing fixture.

[0004] In the above solution, the machining platform has a vacuum hole to hold the button on the table. However, the vacuum holding only has a longitudinal restraining force. In the subsequent CNC machining, the button will inevitably be subjected to pressure from the horizontal tool. The holding force cannot resist the lateral squeezing of the tool, causing the button to shift and resulting in a decrease in machining accuracy. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned problems by providing a key fixing fixture for wind instruments that can solve the aforementioned technical issues.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A key fixing fixture for wind instruments includes a fixture body, in which a processing part and a fastening part are provided and spliced ​​together. A contour clamping groove is provided on the top surface of the processing part, and a linearly movable fastening block is provided in the fastening part. One end of the fastening block abuts against the processing part to change the volume of the contour clamping groove.

[0008] In the aforementioned wind instrument key fixing fixture, the processing part includes a fixed clamping plate and an elastic clamping plate that can be assembled into the complete contour clamping groove. The fixed clamping plate is connected to the fastening part, and the side of the elastic clamping plate away from the fastening part is elastically connected to the fixed clamping plate and is abutted by the fastening block.

[0009] In the aforementioned wind instrument key fixing fixture, a splicing gap groove is provided on the side of the processing part near the fastening part. The splicing gap groove divides the contour clamping groove into two parts distributed on the fixed clamping plate and the elastic clamping plate.

[0010] In the aforementioned wind instrument key fixing fixture, the end of the elastic clamp near the fastening part can elastically swing relative to one side of the fixing clamp and abut against the fastening block.

[0011] In the aforementioned wind instrument key fixing fixture, the fastening block pushes the elastic clamping plate against one side of the fixed clamping plate, thereby reducing the volume of the conformal clamping groove.

[0012] In the aforementioned wind instrument key fixing fixture, the processing part is provided with several uniformly arranged contour clamping grooves, and there is a separation gap groove between two adjacent elastic clamping plates, which is opened from the side near the fastening part. The fastening block simultaneously abuts against the two elastic clamping plates from the separation gap groove.

[0013] In the aforementioned wind instrument key fixing fixture, a wedge-shaped opening is provided at one end of the separation gap groove near the fastening part, and a wedge-shaped head is provided at the end of the fastening block to cooperate with and abut against the wedge-shaped opening.

[0014] In the aforementioned wind instrument key fixing fixture, an extended through groove is provided at the end of the separation gap groove away from the fastening part, and the width of the extended through groove is greater than the width of the separation gap groove.

[0015] In the aforementioned wind instrument key fixing fixture, the fastening part has a fastening groove leading to the processing part, and the fastening block moves linearly in the fastening groove.

[0016] In the aforementioned wind instrument key fixing fixture, a fastening cover plate is provided on the side of the fastening part near the processing part, covering the fastening block. The fastening cover plate has a guide groove on its surface that cooperates with the fastening block.

[0017] Advantages of this utility model:

[0018] A pneumatic pump linearly drives the fastening block, with one end pressing against the elastic clamping plate. This forces the elastic clamping plate closer to the fixed clamping plate, reducing the volume within the contour clamping groove. The sidewall of the contour clamping groove then holds the fixed keys, enabling secure and quick assembly / disassembly of the instrument keys. Simultaneously, the compressive force applied to the elastic clamping plate at one end allows the keys to rest against the other end of the contour clamping groove, unifying the key's reference position and improving the precision of multiple machining operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the processing part and fastening part of this utility model.

[0021] Figure 3 This is a schematic diagram of the fastening block structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the fastening cover structure of this utility model.

[0023] In the diagram, there are: machining part 1, contour clamping groove 11, fixing clamping plate 12, elastic clamping plate 13, splicing gap groove 14, separation gap groove 15, extension through groove 16, guide groove 17, wedge-shaped opening 18, fastening part 2, fastening block 21, wedge head 22, fastening slide 23, and fastening cover plate 24. Detailed Implementation

[0024] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.

[0025] like Figures 1-4 As shown, a wind instrument key fixing fixture includes a fixture body, in which a processing part 1 and a fastening part 2 are spliced ​​together. A contour clamping groove 11 is provided on the top surface of the processing part 1, and a linearly movable fastening block 21 is provided in the fastening part 2. One end of the fastening block 21 abuts against the processing part 1 to change the internal volume of the contour clamping groove 11.

[0026] That is, the fixture body is divided into two parts: a processing part 1 and a fastening part 2. A contour clamping groove 11 is opened on the processing part 1 to place the key. Then, the fastening block 21 on the fastening part 2 is driven by the cylinder to push against the contour clamping groove 11 area of ​​the processing part 1, so that the contour clamping groove 11 undergoes a certain deformation to change its internal volume, thereby allowing the groove wall to clamp the key and ensure the stability of the key in subsequent processing.

[0027] In this embodiment, the processing part 1 includes a fixed clamping plate 12 and an elastic clamping plate 13 that can be assembled into a complete contour clamping groove 11. The fixed clamping plate 12 is connected to the fastening part 2, and the elastic clamping plate 13 is elastically connected to the fixed clamping plate 12 on the side away from the fastening part 2 and is abutted by the fastening block 21.

[0028] The fixed clamp plate is integral with the fixture base or bolted together to maintain rigidity. The elastic clamp plate is partially connected to the fixed clamp plate at the end away from the fastening part 2, so that the end of the elastic clamp plate near the fastening part 2 can swing elastically relative to the fixed clamp plate. The fastening block pushes against the elastic end of the elastic clamp plate and moves closer to the fixed clamp plate, thereby forming a clamping and fixing of the key by the fixed clamp plate 12 and the fastening part 2.

[0029] In this embodiment, a splicing gap groove 14 is provided on the side of the processing part 1 near the fastening part 2. The splicing gap groove 14 divides the contour clamping groove 11 into two parts distributed on the fixed clamping plate 12 and the elastic clamping plate 13.

[0030] A gap groove that does not penetrate between the fixed clamping plate and the elastic clamping plate is cut on the top surface using a fine milling cutter. This ensures that the elastic clamping plate has room to move relative to the fixed clamping plate, allowing the contour clamping slot to have enough margin for quick material loading, while also ensuring stable clamping of the key when the two clamping plates are close together.

[0031] In this embodiment, the end of the elastic clamp 13 near the fastening part 2 can swing elastically relative to the side of the fixed clamp 12 and abut against the fastening block 21.

[0032] The elastic clamp 13 has a certain degree of extensibility. The movable end of the elastic clamp 13 is pushed by the fixed block to bend and move closer to the fixed clamp, thereby achieving the clamping of the key.

[0033] In this embodiment, the fastening block 21 pushes the elastic clamping plate 13 against the fixed clamping plate 12, thereby reducing the internal volume of the contour clamping groove 11.

[0034] When the front end of the fastening block contacts the elastic clamping plate, it applies pressure evenly, pressing it against the fixed clamping plate. The clamping groove walls of the two plates close, pressing the musical instrument keys.

[0035] In this embodiment, the processing part 1 is provided with a plurality of uniformly arranged contour clamping grooves 11, and there is a separation gap groove 15 between two adjacent elastic clamping plates 13, which is opened from the side near the fastening part 2. The fastening block 21 simultaneously abuts against the two elastic clamping plates 13 from the separation gap groove 15.

[0036] The fastening block extends into the separation gap groove 15 and pushes the elastic clamping plate to both sides, causing the elastic clamping plate to move closer to the fixed clamping plate, thus forming a synchronous action of the two clamping positions.

[0037] In this embodiment, a wedge-shaped opening 18 is provided at one end of the separation gap groove 15 near the fastening part 2, and a wedge-shaped head 22 is provided at the end of the fastening block 21 to cooperate with the wedge-shaped head 22 to abut.

[0038] The wedge-shaped opening 18 and the wedge-shaped head 22 cooperate to make the fastening block 21 squeeze into the separation gap groove 15 more smoothly, and the clamping force of the two clamps on the key can also be adjusted by controlling the air pump.

[0039] In this embodiment, an extension groove 16 is provided at the end of the separation gap groove 15 away from the fastening part 2, and the width of the extension groove 16 is greater than the width of the separation gap groove 15.

[0040] The extension groove 16 is larger than the separation gap groove 15, which reduces the thickness of the plate at the connection between the fixed clamping plate 12 and the elastic clamping plate 13, thereby increasing the extensibility of the elastic clamping plate 13, improving the range of motion of the movable end, and also reducing the thrust required for the air pump to push the fixed block.

[0041] In this embodiment, the fastening part 2 is provided with a fastening groove 23 leading to the processing part 1, and the fastening block 21 moves linearly in the fastening groove 23.

[0042] An insert or a milled U-shaped groove is used inside the fastening part to embed a linear bearing or slide rail; the fastening block is equipped with a slide rail hole, and a guide rod is used to constrain its linear movement to ensure smooth and lateral movement.

[0043] In this embodiment, a fastening cover plate 24 is provided on the side of the fastening part 2 near the processing part 1, covering the fastening block 21. The fastening cover plate 24 has a guide groove 17 on its surface that cooperates with the fastening block 21.

[0044] The upper half of the fastening slide 23 on the side near the processing part 1 is composed of fastening cover plate 24. The fastening slide 23 can be manually disassembled and fixed to the fastening part 2 by bolts. The guide groove matches the shape of the upper side of the fastening block to prevent it from deflecting. It also makes it easy to open the fastening cover plate 24 to clean the wedge-shaped opening 18 and the wedge-shaped head 22, preventing metal chips from getting stuck in it during the processing.

[0045] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A mouthpiece key fixing jig for a wind instrument, comprising a jig body, characterized by, The fixture body is provided with a processing part (1) and a fastening part (2) that are spliced ​​together. A contour clamping groove (11) is provided on the top surface of the processing part (1). A linearly movable fastening block (21) is provided in the fastening part (2). One end of the fastening block (21) abuts against the processing part (1) to change the internal volume of the contour clamping groove (11).

2. The wind instrument key fixing fixture according to claim 1, characterized in that, The processing part (1) includes a fixed clamping plate (12) and an elastic clamping plate (13) that can be assembled into the complete contour clamping groove (11). The fixed clamping plate (12) is connected to the fastening part (2). The elastic clamping plate (13) is elastically connected to the fixed clamping plate (12) on the side away from the fastening part (2) and is abutted by the fastening block (21).

3. The wind instrument key fixing fixture according to claim 2, characterized in that, A splicing gap groove (14) is provided on the side of the processing part (1) near the fastening part (2). The splicing gap groove (14) divides the contour clamping groove (11) into two parts distributed on the fixed clamping plate (12) and the elastic clamping plate (13).

4. The wind instrument key fixing fixture according to claim 3, characterized in that, The elastic clamp (13) near the fastening part (2) can swing elastically relative to the fixed clamp (12) and abut against the fastening block (21).

5. The wind instrument key fixing fixture according to claim 3, characterized in that, The fastening block (21) pushes the elastic clamp (13) against the fixed clamp (12) side, making the internal volume of the contour clamping groove (11) smaller.

6. The wind instrument key fixing fixture according to claim 3, 4, or 5, characterized in that, The processing part (1) has a number of uniformly arranged contour clamping grooves (11), and there is a separation gap groove (15) between two adjacent elastic clamps (13) from the side near the fastening part (2). The fastening block (21) simultaneously abuts against the two elastic clamps (13) from the separation gap groove (15).

7. The wind instrument key fixing fixture according to claim 6, characterized in that, The separation gap groove (15) has a wedge-shaped opening (18) at one end near the fastening part (2), and the end of the fastening block (21) is provided with a wedge-shaped head (22) that cooperates with the wedge-shaped opening (18) to abut.

8. The wind instrument key fixing fixture according to claim 6, characterized in that, The separation gap groove (15) has an extension groove (16) at one end away from the fastening part (2), and the width of the extension groove (16) is greater than the width of the separation gap groove (15).

9. The wind instrument key fixing fixture according to claim 1, characterized in that, The fastening part (2) has a fastening groove (23) leading to the processing part (1), and the fastening block (21) moves linearly in the fastening groove (23).

10. The wind instrument key fixing fixture according to claim 9, characterized in that, The fastening part (2) is provided with a fastening cover plate (24) on the side near the processing part (1) to cover the fastening block (21). The fastening cover plate (24) has a guide groove (17) on its surface to cooperate with the fastening block (21).

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