Guqin detection device

Abstract

The utility model belongs to the technical field of seven-stringed plucked instruments, and particularly relates to a seven-stringed plucked instrument detection device, which comprises an upper frame body and a base, the upper frame body is hinged with the base at one end, and the upper frame body is in pin joint with the base at the other end; the upper frame body is provided with strings, and the base is provided with a pressing assembly. The pressing assembly comprises an elastic body and a pressing plate, the elastic body is located between the pressing plate and the base, the pressing plate is used for containing a to-be-tested workpiece, and the elastic body is used for making the to-be-tested workpiece abut against the string. According to the guqin detection device, the pressing force for pressing the string by the workpiece is provided through the pressing assembly, the guqin detection device can be suitable for detection of guqin of various sizes, and during detection, the upward thrust provided after the elastic body is pressed can always ensure that the workpiece is attached to the string, so that the reliability of workpiece detection is ensured, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of guqin, and specifically, the utility model relates to a guqin detection device. Background Art

[0002] The manufacturing process of guqin is complex, and the luthier needs to work meticulously at each step of making the guqin. During the manufacturing process, the process of making the guqin is interspersed before and after assembling the guqin, and sound quality detection is supplemented. During the detection, it is necessary to detect whether the three kinds of sound qualities of the sound of the guqin embryo, such as open string sound, harmonic sound, and stopped sound, meet the expectations, so a detection device is required for detection.

[0003] Currently, there are also some design cases of guqin detection devices in the prior art. For example, in the patent application document with the application number 201910632220.9, the application date of July 13, 2019, and the invention creation name of a guqin sound quality debugging mold, a device for detecting guqin is mentioned. Among them, the guqin sound quality debugging mold includes an upper mold and a lower mold, and the upper mold and the lower mold are rotatably connected through a hinge. When in use, according to the height of the guqin body to be debugged, a support rod with a different height of the padding plate is selected and placed on the groove on the storage groove, and then the guqin body is placed on the two support rods, and the guqin body is aligned with the placement groove. After placing it well, the upper mold is covered on the lower mold, so that the strings are pressed on the guqin body. Finally, the lock catch on the lower mold is fastened to the lock ring on the upper mold, so that the upper mold and the lower mold are locked tightly, and then the strings can be plucked to debug the guqin body.

[0004] In the technical solution of the above guqin sound quality debugging mold, it is necessary to select different support rods according to different heights of the guqin body, and each guqin has its own characteristics, and due to its own size and other factors, it may not be exactly adapted to the support rod. If support rods are made separately for each guqin, the material cost and time cost will be increased. Therefore, it is particularly important to provide a guqin detection device with universality. Content of the Utility Model

[0005] The utility model provides a guqin detection device, which can solve the technical problem that the guqin detection device in the prior art cannot be universal for various guqins.

[0006] To solve the above problems, the utility model provides a guqin detection device, and its technical solution is as follows:

[0007] A guqin detection device includes an upper frame body and a base, the upper frame body and the base are hinged at one end and pin-connected at the other end; strings are installed on the upper frame body, and a pressing component is installed on the base; the pressing component includes an elastic body and a pressing plate, the elastic body is located between the pressing plate and the base, the pressing plate is used for placing the workpiece to be tested, and the elastic body is used for making the workpiece to be tested abut against the strings.

[0008] The guqin detection device described above is further preferably configured as follows: the pressing components are arranged in pairs, with one pressing component near one end of the workpiece to be measured and the other pressing component near the other end of the workpiece to be measured; the pressing component further includes a bottom plate, which is located between the base and the elastic body and is used to provide an installation position for the elastic body; each pressing component includes one pressing plate, one bottom plate and two elastic bodies, and the elastic bodies are springs; the vertical heights of the two pressing plates are flush, and the sizes of the four elastic bodies are the same.

[0009] The guqin detection device described above is further preferably configured as follows: the upper frame body includes a frame and adjusting plates. There are two adjusting plates, which are respectively located at both ends in the length direction of the frame; one end of the string is installed on one adjusting plate, and the other end of the string is installed on the other adjusting plate; two adjusting grooves and two adjusting bolts are provided on each adjusting plate. A wing nut is threadedly connected to the adjusting bolt. The length direction of the adjusting groove is arranged vertically. The adjusting bolt passes through the adjusting groove and passes through the through hole on the frame; the adjusting bolt and the wing nut are used to fasten the adjusting plate to the frame, and the adjusting groove is used to adjust the matching position with the adjusting bolt to adjust the distance between the string and the base.

[0010] The guqin detection device described above is further preferably configured as follows: a connecting column is installed on one adjusting plate, and a string post is installed on the other adjusting plate. The string post is used to adjust the tension of the string; one end of the string is connected to the connecting column, and the other end of the string is connected to the string post. There are multiple string posts, and the multiple string posts correspond to the multiple strings one by one.

[0011] The guqin detection device described above is further preferably configured to further include a fret position indicator, which includes a guqin fret scale and an indicating block; the guqin fret scale is fixedly installed on the upper frame body, and scales are provided on the guqin fret scale; the indicating block is movably installed on the guqin fret scale, and an indicating hole is provided on the indicating block, and the indicating hole is used to indicate the fret position of the workpiece to be measured.

[0012] The guqin detection device described above is further preferably configured as follows: the cross-sectional profile of the guqin fret scale is an inverted isosceles trapezoid; a sliding groove is provided at the bottom of the indicating block, and the profile of the sliding groove is the same as the cross-sectional profile of the guqin fret scale; the sliding groove is slidably matched with the guqin fret scale to realize the sliding of the indicating block on the guqin fret scale.

[0013] The guqin detection device described above is further preferably configured as follows: the guqin fret scale is made of ferromagnetic material, the indicating block is a magnet, and the indicating block is attracted to the guqin fret scale.

[0014] The guqin detection device as described above is further preferably: the base is located inside the upper frame, and the outer contour of the base is in clearance fit with the inner contour of the upper frame.

[0015] The guqin detection device as described above is further preferably: the outer contours of both the upper frame and the base are rectangular. The hinged end of the upper frame and the base is located at a short side of the rectangle, and the pin-connected end of the upper frame and the base is located at the other short side of the rectangle; at the hinged end, the upper frame and the base are connected by a hinge assembly; at the pin-connected end, the upper frame is provided with a jack, the base is provided with a socket, and a pin is detachably installed in the jack and the socket.

[0016] The guqin detection device as described above is further preferably: the hinge assembly includes a first leaf, a second leaf, a hinge shaft and a torsion spring; the hinge shaft passes through the hinge holes of the first leaf and the second leaf. The first leaf is installed on the upper frame, and the second leaf is installed on the base; the torsion spring is sleeved on the outer circumference of the hinge shaft, one end of the torsion spring abuts against the upper frame, and the other end of the torsion spring abuts against the base.

[0017] The guqin detection device as described above is further preferably: a detection frame is installed on a long side of the upper frame, and a plurality of detection holes are provided on the detection frame, and the detection holes are used to provide installation positions for sound listening devices.

[0018] The guqin detection device as described above is further preferably: in the middle of the long side where the detection frame is located, the upper frame is provided with a bracket interface, and the bracket interface is used to provide an installation position for the bracket; the bracket interface is a threaded hole.

[0019] The guqin detection device as described above is further preferably: the base is provided with a hollowed-out groove, and the area of the hollowed-out groove accounts for more than 50% of the area of the base; a reinforcing plate is snap-connected in the hollowed-out groove, and the reinforcing plate fits the upper surface of the base to improve the structural strength of the base; the reinforcing plates are arranged in pairs, and two pressing components are located between the two reinforcing plates.

[0020] The guqin detection device as described above is further preferably: the bottom plate of one pressing component is snap-connected to the hollowed-out groove, and the bottom plate of the other pressing component is lapped on the hollowed-out groove.

[0021] The guqin detection device described above is further preferably: a first string distance plate and a second string distance plate are provided on the strings, a plurality of first string distance grooves are provided on the first string distance plate, and a plurality of second string distance grooves are provided on the second string distance plate; the first string distance plate is used to abut against the longyin of the workpiece, and the first string distance grooves are used to define the string distance of the strings at the longyin; the second string distance plate is used to abut against the yueshan of the workpiece, and the second string distance grooves are used to define the string distance of the strings at the yueshan.

[0022] Analysis shows that, compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0023] The guqin detection device of the present invention provides the pressing force for pressing the strings by the pressing assembly, and can be applicable to the detection of workpieces of various specifications. During the detection, the upward thrust provided after the elastic body is pressed can always ensure that the workpiece to be detected fits the strings, thereby ensuring the reliability of the detection, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the closed state of the guqin detection device of the present invention Figure 1 ;

[0025] Figure 2 Of the present invention Figure 1 Partial enlarged view at A;

[0026] Figure 3 Schematic diagram of the closed state of the guqin detection device of the present invention Figure 2 ;

[0027] Figure 4 Of the present invention Figure 2 Partial enlarged view at B;

[0028] Figure 5 Schematic diagram of the open state of the guqin detection device of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the pressing assembly of the present invention;

[0030] Figure 7 Schematic diagram of the bottom structure of the guqin detection device of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the hinge assembly of the present invention;

[0032] Figure 9 Schematic diagram of the installation of the workpiece to be detected on the guqin detection device of the present invention.

[0033] In the figure: 1 - upper frame body; 2 - pressing component; 3 - adjusting plate; 4 - inlay position indicator; 5 - string; 6 - detection frame; 7 - adjusting groove; 8 - adjusting bolt; 9 - connecting column; 10 - hinge component; 11 - frame; 12 - string post; 13 - bracket interface; 14 - base; 15 - fret ruler; 16 - indicating block; 17 - jack; 18 - socket; 19 - pin; 20 - reinforcing plate; 21 - hollow groove; 22 - bottom plate; 23 - elastic body; 24 - pressing plate; 25 - hinge shaft; 26 - torsion spring; 27 - first blade; 28 - second blade; 29 - first string spacing plate; 30 - workpiece to be measured; 31 - yueshan; 32 - second string spacing plate. Detailed implementation manner

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0035] In the description of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected" and "coupled" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] In the present invention, the "workpiece 30 to be measured" is a general term for various states of the guqin during tone measurement, and can refer to a guqin embryo that has just been assembled and not painted, a guqin embryo after painting, a guqin embryo without strings, or even the wood used to make the guqin, etc.

[0037] Please refer to Figures 1 to 9 , in which, Figure 1 is a schematic diagram of the closed state of the guqin detection device of the present invention Figure 1 ; Figure 2 is the Figure 1 partial enlarged view at A of the present invention; Figure 3 is a schematic diagram of the closed state of the guqin detection device of the present invention Figure 2 ; Figure 4 is the Figure 2Partial enlarged view at B; Figure 5 Schematic diagram of the open state of the guqin detection device of the present utility model; Figure 6 Schematic diagram of the structure of the pressing component of the present utility model; Figure 7 Schematic diagram of the bottom structure of the guqin detection device of the present utility model; Figure 8 Schematic diagram of the structure of the hinge component of the present utility model; Figure 9 Schematic diagram of the installation of the workpiece to be measured on the guqin detection device of the present utility model.

[0038] As Figure 1 、 Figure 3 and Figure 9 As shown, in an embodiment of the present utility model, a guqin detection device is provided. Specifically, the guqin detection device includes an upper frame body 1 and a base 14. The upper frame body 1 is hinged to the base 14 at one end and pin-connected at the other end. A string 5 is installed on the upper frame body 1, and a pressing component 2 is installed on the base 14. Among them, the pressing component 2 includes an elastic body 23 and a pressing plate 24, and the elastic body 23 is located between the pressing plate 24 and the base 14.

[0039] During use, the workpiece 30 to be measured is placed on the pressing plate 24, and then the upper frame body 1 and the base 14 are pin-connected. In the state where the upper frame body 1 and the base 14 are pin-connected, the elastic body 23 is compressed, providing an upward thrust for the workpiece 30 to be measured, so that the workpiece 30 to be measured can be in contact with the string 5. In this embodiment, the pressing component 2 is used to provide the pressing force for the workpiece 30 to be measured to press the string 5, which can be applicable to the detection of workpieces 30 to be measured of various specifications. During detection, the upward thrust provided after the elastic body 23 is compressed can always ensure that the workpiece 30 to be measured fits the string 5, thereby ensuring the reliability of the detection, and the operation is simple and convenient.

[0040] Furthermore, as Figure 1 and Figure 9 shown, in this embodiment, the pressing components 2 are arranged in pairs, one pressing component 2 is close to one end of the workpiece 30 to be measured, and the other pressing component 2 is close to the other end of the workpiece 30 to be measured. The two pressing components 2 can play the role of the heaven and earth columns in the guqin belly.

[0041] Even further, as Figure 6As shown, in this embodiment, the pressing assembly 2 further includes a bottom plate 22. The bottom plate 22 is located between the base 14 and the elastic body 23 and can provide an installation position for the elastic body 23. Specifically, each pressing assembly 2 includes a pressing plate 24, a bottom plate 22, and two elastic bodies 23, and the elastic bodies 23 are springs. Compared with installing one spring for each pressing assembly 2, two springs are installed for each pressing assembly 2 in this embodiment, and the force on the pressing plate 24 is more balanced. Preferably, the four springs are of the same size, so that the workpiece 30 to be measured is subjected to balanced forces at the two pressing assemblies 2; the vertical heights of the two pressing plates 2 are flush, which can simulate the placement state of the guqin on a horizontal plane.

[0042] When detecting a guqin, the height differences of guqins with similar size specifications are not significant. If the size specifications of the guqins vary greatly, relying solely on the elastic force of the pressing assembly 2 will inevitably result in too much or too little pressure during pressing. To further improve the universality of the present utility model, as Figure 1 and Figure 2 shown, in an embodiment of the present utility model, the upper frame body 1 includes a frame 11 and adjusting plates 3. There are two adjusting plates 3, which are respectively located at both ends of the frame 11 in the length direction. One end of the string 5 is installed on one adjusting plate 3, and the other end of the string 5 is installed on the other adjusting plate 3. The heights of the two adjusting plates 3 are adjustable relative to the frame 11, and thus the height of the string 5 can be adjusted to adapt to workpieces 30 to be measured with different size specifications. Specifically, each adjusting plate 3 is provided with two adjusting slots 7 and two adjusting bolts 8. A wing nut is threadedly connected to the adjusting bolt 8. The length direction of the adjusting slot 7 is arranged vertically, and the adjusting bolt 8 is inserted into the adjusting slot 7 and passes through the through hole on the frame 11. During use, the adjusting plate 3 can be fastened to the frame 11 through the adjusting bolt 8 and the wing nut. When it is necessary to adjust the height of the string 5, loosen the wing nut on the adjusting bolt 8, adjust the position of the adjusting plate 3, and then tighten the wing nut on the adjusting bolt 8, and the height of the string 5 can be adjusted, that is, by adjusting the matching position of the adjusting slot 7 and the adjusting bolt 8, the distance between the string 5 and the base 14 can be adjusted.

[0043] Furthermore, as Figures 1 to 3As shown in the figure, in this embodiment, a connecting post 9 is installed on one adjusting plate 3, and a string post 12 is installed on the other adjusting plate 3. One end of the string 5 is connected to the connecting post 9, and the other end of the string 5 is connected to the string post 12, thereby enabling the installation of the string 5 on the two adjusting plates 3. In this embodiment, there are multiple (seven) string posts 12, and the seven string posts 12 correspond to the seven strings 5 one by one, which can not only fix the strings 5 but also adjust the tension of the strings 5. When adjusting the tension of the strings 5, the adjustment principle of the string posts 12 is the same as that of stringed instruments (such as guqin and guitar), which can be obtained by those skilled in the art according to the existing technology and is not within the protection scope of this utility model, so it will not be elaborated here.

[0044] As Figure 3 and Figure 4 shown, in an embodiment of the present utility model, it further includes a fret indicator 4. Specifically, the fret indicator 4 includes a fret scale 15 and an indicating block 16. The fret scale 15 is fixedly installed (such as by gluing) on the upper frame body 1, and the fret scale 15 is provided with scales. The indicating block 16 is movably installed on the fret scale 15, and the indicating block 16 is provided with an indicating hole, which is used to indicate the fret position of the workpiece 30 to be measured. When in use, by adjusting the positions of the respective indicating blocks 16 on the fret scale 15, the fret positions of the workpiece 30 to be measured can be marked, which is convenient for reference during playing detection, controlling the accuracy of each pitch position, and can test the audio and tone quality.

[0045] Furthermore, as Figure 4 shown, in this embodiment, the cross-sectional contour of the fret scale 15 is an inverted isosceles trapezoid. The bottom of the indicating block 16 is provided with a sliding groove, and the contour of the sliding groove is the same as the cross-sectional contour of the fret scale 15. The sliding groove is in sliding fit with the fret scale 15, which can realize the sliding of the indicating block 16 on the fret scale 15, and further adjust the position of the indicating block 16. In other embodiments of the present utility model, the adjustment of the fret indicator 4 can also have other forms. For example, the material of the fret scale 15 is selected as a ferromagnetic material, and the material of the indicating block 16 is selected as a magnet. The indicating block 16 is attracted to the fret scale 15, and the position of the indicating block 16 can also be adjusted.

[0046] As Figure 5 and Figure 7 shown, in an embodiment of the present utility model, when the base 14 is pin-connected to the upper frame body 1, the base 14 is located inside the upper frame body 1, and the outer contour of the base 14 is in clearance fit with the inner contour of the upper frame body 1. In this embodiment, the clearance fit between the base 14 and the upper frame body 1 can ensure the smoothness of the flipping of the upper frame body 1; the base 14 is located inside the upper frame body 1, and when the two are pin-connected, the base 14 can also play a limiting role on the upper frame body 1 inside the upper frame body 1 to prevent the upper frame body 1 from deforming.

[0047] As Figure 5As shown, in an embodiment of the present utility model, the outer contours of the upper frame body 1 and the base 14 are both rectangular. The hinged end of the upper frame body 1 and the base 14 is at a short side of the rectangle, and the pin-connected end of the upper frame body 1 and the base 14 is at the other short side of the rectangle. In this embodiment, when the workpiece 30 to be measured (such as a piano blank) is placed, when the upper frame body 1 is lowered so that the strings 5 are in contact with the piano blank, the seven strings 5 are stressed simultaneously, and there will be no situation of misalignment with the piano blank due to different stress sequences.

[0048] Further, as Figure 1 , Figure 2 and Figure 5 shown, in this embodiment, at the hinged end, the upper frame body 1 and the base 14 are connected by a hinge assembly 10, which facilitates the flipping of the upper frame body 1; at the pin-connected end, the upper frame body 1 is provided with a jack 17, the base 14 is provided with a socket 18, and a pin 19 is installed in the jack 17 and the socket 18 in a pluggable manner, so as to realize the pin connection between the upper frame body 1 and the base 14.

[0049] Furthermore, as Figure 5 shown, in this embodiment, the axial direction of the pin 19 is parallel to the short side of the rectangle, and one jack 17 is provided at each of the two long sides of the upper frame body 1. When the upper frame body 1 and the base 14 are pin-connected, the pin 19 is inserted into the two jacks 17 and a socket 18, so as to ensure the balanced stress when the upper frame body 1 and the base 14 are pin-connected.

[0050] As Figure 8 shown, in an embodiment of the present utility model, the hinge assembly 10 includes a first leaf 27, a second leaf 28, a hinge shaft 25 and a torsion spring 26. Specifically, the hinge shaft 25 is inserted into the hinge holes of the first leaf 27 and the second leaf 28, and the first leaf 27 and the second leaf 28 can be rotated around the hinge shaft 25. At the same time, the first leaf 27 is installed on the upper frame body 1 by screws, and the second leaf 28 is installed on the base 14 by screws, so as to realize the hinged connection between the upper frame body 1 and the base 14. The torsion spring 26 is sleeved on the outer circumference of the hinge shaft 25, one end of the torsion spring 26 abuts against the upper frame body 1, and the other end of the torsion spring 26 abuts against the base 14. During the process of lowering the upper frame body 1 to pin-connect the upper frame body 1 and the base 14, the torsion spring 26 can play a role in blocking the falling of the upper frame body 1, so as to avoid pinching hands caused by the sudden falling of the upper frame body 1, and can also provide assistance for operators with small strength (such as women) to turn up or lower the upper frame body 1.

[0051] Further, as Figure 8 shown, in this embodiment, there are two first leaves 27, two second leaves 28 and two torsion springs 26, and there is one hinge shaft 25. One first leaf 27 and one second leaf 28 form a leaf pair, and the two torsion springs 26 are located between the two leaf pairs.

[0052] As Figure 1 shown, in an embodiment of the present utility model, a detection frame 6 is installed on one long side of the upper frame body 1. A plurality of detection holes are provided on the detection frame 6. The detection holes can provide installation positions for sound listening devices, facilitate the installation of various devices during detection, and provide interfaces for them to prevent the devices from falling off.

[0053] As Figure 3 shown, in an embodiment of the present utility model, at the middle part of the long side where the detection frame 6 is located, the upper frame body 1 is provided with a bracket interface 13. The bracket interface 13 can provide an installation position for the bracket, facilitating the external connection of the bracket, such as an external music score stand. Preferably, the bracket interface 13 is a threaded hole. When connecting the external bracket, the bracket can be fastened to the upper frame body 1 by means of threaded connection.

[0054] As Figure 5 and Figure 7 shown, in an embodiment of the present utility model, the base 14 is made of wood. A hollow groove 21 is provided on the base 14. The area of the hollow groove 21 accounts for more than 50% of the area of the base 14, which can reduce the weight of the base 14 and improve its portability.

[0055] Further, as Figure 7 shown, in this embodiment, a reinforcing plate 20 is provided on the base 14. Specifically, the reinforcing plate 20 is snap-connected to the hollow groove 21 and fits the upper surface of the base 14, which can stabilize the wood on both sides of the hollow groove 21, improve the structural strength of the base 14, and prevent the structural strength of the base 14 from decreasing due to the opening of the hollow groove 21.

[0056] Furthermore, as Figure 7 shown, in this embodiment, the number of the reinforcing plates 20 is two. The two reinforcing plates 20 correspond to the two pressing components 2 one by one. The two pressing components 2 are located between the two reinforcing plates 20. Thus, the reinforcing plate 20 can enhance the stability of the force-bearing part of the base 14. Preferably, the bottom plate 22 of one pressing component 2 is snap-connected to the hollow groove 21, and the bottom plate 22 of the other pressing component 2 is lapped on the hollow groove 21. The bottom plate 22 is only placed on the base 14 and can be adjusted at any time, facilitating the position adjustment according to the length of the workpiece 30 to be measured.

[0057] As Figure 9As shown in the figure, in order to accurately correspond the string 5 with the workpiece to be measured 30 (such as a blank of a guqin), in an embodiment of the present invention, a first string distance plate 29 and a second string distance plate 32 are provided on the string 5. A plurality of first string distance grooves are provided on the first string distance plate 29, and a plurality of second string distance grooves are provided on the second string distance plate 32. During detection, the first string distance plate 29 is used to abut against the longyin of the blank of a guqin, and the first string distance grooves are used to define the string distance of the string 5 at the longyin; the second string distance plate 32 is used to abut against the yueshan 31 of the blank of a guqin and can also be used as the yueshan 31 temporarily, and the second string distance grooves are used to define the string distance of the string 5 at the yueshan 31. In this embodiment, by providing the first string distance plate 29 and the second string distance plate 32, the accuracy of positioning the string 5 can be improved.

[0058] As Figures 1 to 9 shown in the figure, the working process of the present invention will be described in detail below:

[0059] The first step: Pull out the bolt 19 and turn up the upper frame body 1 along the hinge assembly 10.

[0060] The second step: Place the workpiece to be measured 30 (such as a blank of a guqin) on the pressing plate 24. During placement, preliminarily position the blank of a guqin, and the longyin of the blank of a guqin abuts against the first string distance plate 29.

[0061] The third step: Lower the upper frame body 1 and insert the bolt 19 between the upper frame body 1 and the base 14 to achieve pin connection.

[0062] The fourth step: Adjust the position of the second string distance plate 32 so that the second string distance plate 32 is located at the yueshan 31 and abuts against the blank of a guqin.

[0063] The fifth step: Adjust the position of the indicating block 16 on the qinhui scale 15 to mark the qinhui position of the blank of a guqin to prepare for playing.

[0064] The sixth step: Correspondingly install a sound listening device at the detection hole, install a bracket at the bracket interface 13, and place a qin score on the bracket.

[0065] After completion, the correct installation of the blank of a guqin on the guqin detection device is achieved, and then the blank of a guqin can be played to test whether the open string sound, harmonic sound, and stopped sound of the blank of a guqin meet the expectations.

[0066] As is known by common technical knowledge, the present invention can be implemented by other embodiments that do not deviate from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A guqin detection device, characterized in that: include: An upper frame and a base, wherein the upper frame and the base are hinged at one end and pinned at the other end; The upper frame is provided with strings, and the base is provided with a pressing assembly; The clamping assembly comprises an elastic body and a pressing plate, wherein the elastic body is located between the pressing plate and the base, the pressing plate is used to hold the workpiece to be measured, and the elastic body is used to make the workpiece to be measured abut against the strings.

2. The guqin detection device according to claim 1, characterized in that: The clamping assemblies are arranged in pairs, one of the clamping assemblies is close to one end of the workpiece to be measured, and the other of the clamping assemblies is close to the other end of the workpiece to be measured; The clamping assembly further includes a bottom plate, which is located between the base and the elastic body and is used to provide a mounting position for the elastic body; Each of the clamping assemblies comprises a pressing plate, a bottom plate and two elastic bodies, wherein the elastic bodies are springs; The vertical heights of the two pressing plates are flush, and the sizes of the four elastic bodies are consistent.

3. The guqin detection device according to claim 1, characterized in that: The upper frame includes a frame and an adjustment plate, wherein the number of the adjustment plates is two and the adjustment plates are respectively located at two ends of the frame in the length direction; One end of the string is mounted on one of the adjustment plates, and the other end of the string is mounted on the other adjustment plate; Each of the adjustment plates is provided with two adjustment slots and two adjustment bolts, the adjustment bolts are threadedly connected with butterfly nuts, the length direction of the adjustment slots is vertically arranged, the adjustment bolts are inserted into the adjustment slots and pass through the through holes on the frame; The adjusting bolt and the butterfly nut are used to fasten the adjusting plate to the frame, and the adjusting slot is used to adjust the matching position with the adjusting bolt to adjust the distance between the strings and the base.

4. The guqin detection device according to claim 1, characterized in that: Also included is a fret position indicator, which includes a fret scale and an indicator block; The piano logo ruler is fixedly mounted on the upper frame, and the piano logo ruler is provided with scales; The indicating block is movably mounted on the piano scale, and an indicating hole is provided on the indicating block, and the indicating hole is used to indicate the position of the workpiece to be measured.

5. The guqin detection device according to claim 4, characterized in that: The cross-sectional profile of the piano logo ruler is an inverted isosceles trapezoid; A slide groove is provided at the bottom of the indicator block, and the contour of the slide groove is consistent with the cross-sectional contour of the piano logo ruler; The slide groove is slidably matched with the piano logo ruler to realize the sliding of the indicator block on the piano logo ruler.

6. The guqin detection device according to claim 4, characterized in that: The piano logo ruler is made of ferromagnetic material, the indicating block is a magnet, and the indicating block is attracted to the piano logo ruler.

7. The guqin detection device according to claim 1, characterized in that: The base is located within the upper frame, and the outer contour of the base is clearance-matched with the inner contour of the upper frame; The outer contours of the upper frame and the base are both rectangular, the hinged ends of the upper frame and the base are located at one short side of the rectangle, and the pinned ends of the upper frame and the base are located at the other short side of the rectangle; At the hinged end, the upper frame and the base are connected via a hinge assembly; At the pin connection end, a plug hole is provided on the upper frame body, and a plug sleeve is provided on the base. A plug pin is installed in the plug hole and the plug sleeve in a pluggable manner.

8. The guqin detection device according to claim 7, characterized in that: The hinge assembly comprises a first leaf piece, a second leaf piece, a hinge shaft and a torsion spring; The hinge shaft is inserted into the hinge hole of the first leaf piece and the hinge hole of the second leaf piece, the first leaf piece is installed on the upper frame, and the second leaf piece is installed on the base; The torsion spring is sleeved on the outer side of the circumference of the hinge shaft, one end of the torsion spring abuts against the upper frame body, and the other end of the torsion spring abuts against the base.

9. The guqin detection device according to claim 7, characterized in that: A detection frame is installed on one long side of the upper frame body, and a plurality of detection holes are provided on the detection frame, and the detection holes are used to provide an installation position for the listening device; The upper frame is provided with a bracket interface in the middle of the long side where the detection frame is located, and the bracket interface is used to provide an installation position for the bracket; The bracket interface is a threaded hole.

10. The guqin detection device according to claim 2, characterized in that: The base is provided with a hollow groove, and the area of ​​the hollow groove accounts for more than 50% of the area of ​​the base; A reinforcing plate is clamped and connected in the hollow groove, and the reinforcing plate is attached to the upper surface of the base, so as to improve the structural strength of the base; The reinforcing plates are arranged in pairs, and the two pressing assemblies are located between the two reinforcing plates; The bottom plate of one of the clamping assemblies is connected to the hollow groove by snapping, and the bottom plate of the other clamping assembly is connected to the hollow groove by overlapping.

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