Function fine adjustment jig

Abstract

The utility model provides a function fine adjustment jig which comprises a tray, a base and an adjusting knob, the tray comprises a tray body, a positioning structure located on the first surface of the tray body and used for placing a to-be-adjusted product, a guide column arranged on the second surface, away from the positioning structure, of the tray body and a stud, and the guide column and the stud are arranged on the second surface, away from the positioning structure, of the tray body; the adjusting knob is provided with a threaded hole; the base comprises a base body, a limiting support arranged on the base body, a guide hole and a through hole. The tray and / or the base are / is provided with a notch for exposing at least part of the adjusting knob; wherein the guide column is inserted into the guide hole, the adjusting knob is installed on the limiting support, and the threaded hole is coaxial with the through hole and connected with the stud in a screwed mode. The jig has a lifting function, can accurately adjust the relative height of a to-be-adjusted product and a laser source to adapt to the laser focal length, avoids the influence of repeated adjustment of a laser lens on the equipment stability and the resistance value adjustment precision, and enables the electrical performance of the product to meet the requirements, thereby improving the qualified rate and reducing the production cost.

Description

Technical Field

[0001] The present disclosure relates to the field of hybrid integrated circuit manufacturing, and more specifically, to a function fine-tuning jig used in thin-film hybrid integrated circuit manufacturing. Background Art

[0002] Hybrid integrated circuits include thick-film hybrid integrated circuits and thin-film hybrid integrated circuits. Among them, thin-film hybrid integrated circuits are integrated circuits made by combining semiconductor integration technology with thin-film deposition technology. Thin-film components and their interconnections are made on a substrate using a film-forming method, and discrete semiconductor components, monolithic integrated circuits or micro-components are mixed and assembled on the same substrate, and then packaged. Thin-film hybrid integrated circuits have the characteristics of high interconnection density and high integration, and are suitable for manufacturing low-power circuits. The entire packaging structure has system-level functions, and is also small in size, light in weight, and highly reliable, so they have been widely used.

[0003] In thin-film hybrid integrated circuits, thin-film resistors are one of the main components. The manufacturing method includes depositing one or more layers of metal, oxide or dielectric thin films on the surface of the substrate, and then using photolithography to produce the required graphic structure. Since thin-film hybrid integrated circuits have high requirements for the accuracy of resistor values, and the value range of multiple resistors in the entire thin-film hybrid integrated circuit is relatively wide, it is difficult to achieve the required resistance value by a one-time deposition, and the value needs to be adjusted later.

[0004] Laser resistance trimming is a commonly used thin-film resistor value adjustment method. In the process of implementing this method to adjust the resistance value of the product to be adjusted, there is a technical problem of repeated adjustment of the laser lens for focusing, which leads to poor adjustment accuracy of the resistance value. For example, if the circuit has been assembled and the substrate has been assembled in the housing, at this time, the height of the substrate (i.e., the product to be adjusted) in the housing has changed. If you want to achieve the purpose of laser focusing, you need to repeatedly adjust the laser lens, which is not only inconvenient to operate, but also repeatedly adjusting the laser lens will affect the stability of the equipment and the adjustment accuracy of the resistance value, and even cause the technical parameters of the finished product after the resistance value is adjusted to be significantly different from the expected value. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the present disclosure provides a function fine-tuning fixture, which includes a tray, a base and an adjustment knob, wherein:

[0006] The tray comprises a tray body, a positioning structure for placing the product to be adjusted on a first surface of the tray body, and a guide column and a stud arranged on a second surface of the tray body away from the positioning structure;

[0007] The adjusting knob is provided with a threaded hole;

[0008] The base includes a base body, a limiting bracket, a guide hole and a through hole arranged on the base body;

[0009] The tray and / or the base are provided with a notch for revealing at least a portion of the adjustment knob;

[0010] The guide column is inserted into the guide hole, the adjusting knob is installed on the limit bracket, the limit bracket is used to limit the axial displacement of the adjusting knob, and the threaded hole is coaxial with the through hole and is screwed to the stud.

[0011] The functional fine-tuning jig of the present application has a lifting function. By turning the adjustment knob, the stud screwed thereto can be driven to move vertically, thereby driving the tray to rise / fall to adjust the height of the functional fine-tuning jig carrying the product to be adjusted, thereby at least avoiding the technical problem of poor adjustment accuracy of the resistance value caused by repeatedly adjusting the laser lens for focusing in the prior art.

[0012] Optionally, the limiting bracket includes:

[0013] A plurality of limiting columns are arranged on the base body and are located around the through hole;

[0014] A plurality of limiting plates are respectively arranged on the top ends of the plurality of limiting columns and extend toward the through holes to form a plurality of suspended portions.

[0015] The suspended portion avoids the space above the through hole to avoid interference with the stud, and at the same time forms a limiting space between the base and the suspended portion of the limiting plate. The adjusting knob is arranged in the aforementioned limiting space, so that the vertical (axial) displacement of the adjusting knob (relative to the base) is limited, so that when the adjusting knob is rotated, the tray can be driven to rise / lower relative to the base.

[0016] Optionally, there are multiple guide holes corresponding to the multiple limiting columns one by one; the guide holes penetrate the limiting plate, the limiting columns and the base body. The multiple guide holes are used to stabilize the relative movement between the tray and the base and ensure that the tray is always horizontal.

[0017] Optionally, there are two limiting posts, which are symmetrically arranged on both sides of the through hole;

[0018] The limiting bracket also includes a first connecting plate and / or a second connecting plate, wherein:

[0019] The first connecting plate is arranged between the limiting columns, fits with the base body, and has a hole coaxially arranged with the through hole;

[0020] The second connecting plate is connected between the plurality of limiting plates and has a hole coaxially arranged with the through hole.

[0021] The aforementioned connecting plate can further improve the firmness of the connection of the limiting bracket.

[0022] Optionally, the tray body and the base body are circular with a notch; the stud is arranged at the center of the tray body, and the through hole is arranged at the center of the base body.

[0023] Optionally, the tray body and the base body are provided with the same V-shaped notch;

[0024] The base body is provided with a plurality of positioning holes distributed in an annular shape.

[0025] When in use, the direction of the V-shaped notch of the fixture is based on the convenience of human operation. The positioning holes on the base correspond to the threaded holes reserved on the laser value adjustment device one by one, and are fixed with screws or bolts. The V-shaped notch is used to expose the adjustment knob for easy operation, and can also be used to pull the wire out of the notch.

[0026] Optionally, the adjustment knob is in the shape of a perfect circle, an ellipse or a polygon; the outer circumference of the adjustment knob is provided with knurling, which can increase friction to facilitate precise adjustment of the tray height and focus.

[0027] Optionally, a gasket is provided between the adjusting knob and the base, or symmetrically provided on both sides of the adjusting knob in the axial direction, and the gasket has an inner hole provided coaxially with the threaded hole. Optionally, the gasket and the adjusting knob are integrally formed, and the inner hole of the gasket has a thread that is the same as and continuous with the threaded hole. The gasket is conducive to reducing the friction between the base and the adjusting knob, facilitating operation, and can also play a guiding role for the stud.

[0028] When the two gaskets are symmetrically arranged, the adjusting knob can be easily installed without distinguishing between the front and back during installation.

[0029] Optionally, the positioning structure includes: a plurality of positioning screw holes and a recessed area provided on the first surface of the tray body, wherein a support block is provided in the recessed area. The recessed area is used to accommodate the welding points of the semi-finished product to be adjusted, the support block is used to fully support the semi-finished product to be adjusted, and the positioning screw holes are used to fix the semi-finished product to be adjusted with screws or bolts.

[0030] In summary, by using the functional fine-tuning fixture with a lifting function provided in the embodiment of the present invention, the relative height between the product to be adjusted and the laser source can be accurately adjusted to adapt to the laser focal length, thereby avoiding the influence of repeated adjustment of the laser lens on the stability of the equipment and the accuracy of the resistance adjustment value, and the electrical performance of the product can be made to meet the requirements, thereby improving the qualification rate and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

[0032] Figure 1 is a schematic diagram of the overall structure of the fixture in the embodiment of the present disclosure;

[0033] Figure 2 is a schematic top view of the overall structure of the fixture in the embodiment of the present disclosure;

[0034] Figure 3 is a side view schematic diagram of the overall structure of the fixture in the embodiment of the present disclosure;

[0035] Figure 4 is a schematic diagram of the base structure of the fixture in the embodiment of the present disclosure;

[0036] Figure 5 is a bottom schematic diagram of a base of a fixture in an embodiment of the present disclosure;

[0037] Figure 6 is a schematic diagram of an adjustment knob of a fixture in an embodiment of the present disclosure;

[0038] Figure 7 is a schematic diagram of an adjustment knob of a fixture in an embodiment of the present disclosure, and the figure shows gaskets symmetrically arranged on both sides of the adjustment knob;

[0039] Figure 8 is a schematic diagram of the back structure of a tray of a fixture in an embodiment of the present disclosure;

[0040] Fig. 9 is a schematic diagram of the front structure of a tray of a fixture in an embodiment of the present disclosure;

[0041] Fig.10 It is a schematic diagram of the base structure including two connecting plates in the present disclosure.

[0042] Note in the figure:

[0043] 100 trays, 200 bases, 300 adjustment knobs;

[0044] 101 tray body, 201 base body;

[0045] 111 recessed area, 112 support block, 120 guide column, 130 stud, 140 positioning screw hole;

[0046] 210 limiting bracket, 211 limiting column, 212 limiting plate, 213 first connecting plate, 214 second connecting plate, 220 guide hole, 230 through hole, 240 positioning hole;

[0047] 310 threaded hole, 320 gasket, 330 knurling. DETAILED DESCRIPTION

[0048] In the present specification, it will also be understood that when an element is referred to as being relative to other elements, such as being "connected to" other elements, the one element may be directly connected to or directly coupled to the one element, or there may also be an intervening third element; in addition, in the embodiments of the present disclosure, "connection" mainly refers to structural connection or mechanical transmission connection, such as threaded connection between studs and threaded holes, sliding connection between holes and columns, etc.

[0049] The present disclosure will now be described more fully below with reference to the accompanying drawings, however, the present disclosure can be implemented in many different ways and should not be construed as being limited to the embodiments set forth herein. On the contrary, providing these embodiments herein will make the present disclosure more detailed and complete, and fully convey the scope of the present disclosure to those skilled in the art. The same reference numerals throughout the text represent the same objects.

[0050] At least in order to solve the problems existing in the aforementioned prior art, the present disclosure provides a special function fine-tuning jig, which can be used in the manufacturing process of thin-film hybrid integrated circuits to adjust the assembled or partially assembled semi-finished circuits (hereinafter referred to as semi-finished products to be adjusted or products to be adjusted), that is, to continue to perform functional fine-tuning on them.

[0051] The functional fine-tuning fixture (hereinafter referred to as the "fixture") provided by the present invention is referred to as Figure 1 The whole comprises three parts, namely a base 200 at the bottom, a tray 100 at the top for placing the semi-finished product to be adjusted, and an adjusting knob 300 arranged between the two and fixed relative to the base 200 in the vertical direction and capable of rotating.

[0052] from Figure 1 , Figure 2 , Fig. 9 It can be seen that the tray 100 includes a tray body 101 and a positioning structure located on a first surface (top surface or front surface) of the tray body 101 for placing the product to be adjusted.

[0053] like Figure 8 As shown, the second surface (back or bottom surface) of the tray body 101 away from the positioning structure is provided with a guide post 120 and a stud 130. The guide post 120 may be one or more, preferably two guide posts 120 symmetrically arranged with the stud 130 as the center.

[0054] like Figure 6 , Figure 7 As shown, the adjusting knob 300 is provided with a threaded hole 310 , the thread of the threaded hole 310 matches the thread of the stud 130 , and the thread lead angle should be set to make the thread form a self-locking thread.

[0055] like Figure 3 , Figure 4 and Figure 5As shown, the base 200 includes a base body 201, on which a limiting bracket 210, a guide hole 220 and a through hole 230 are provided. The limiting bracket 210 is used to limit the axial displacement (i.e., the displacement in the vertical direction) of the adjusting knob 300; the guide hole 220 corresponds one-to-one to the guide column 120 of the aforementioned tray 100, and the dimensions are matched. The guide column 120 can slide in the guide hole 220 to limit the movement direction of the tray 100 when it is raised / lowered and maintain its horizontality.

[0056] like Figure 4 , Figure 5 As shown, the through hole 230 is preferably disposed in the middle of the base 200 and passes through the base body 201 for accommodating the stud 130 when the tray 100 is lowered. The provision of the through hole 230 helps to increase the range of motion of the tray 100 when it is raised / lowered.

[0057] At least one of the tray 100 and the base 200 is provided with a notch, preferably both the tray 100 and the base 200 are provided with a notch, and the shape of the notch is exemplified as follows: Figure 1 or Figure 2 As shown, the notch can reveal part of the adjusting knob 300 , making it easier for the user to operate the adjusting knob 300 . In addition, the notch can also be used to lead out a wire connected to the semi-finished product to be adjusted during the test process.

[0058] Optionally, the base 200 and the tray 100 are both fan-shaped due to the setting of the aforementioned notch. Accordingly, the aforementioned notch is V-shaped. Optionally, the notch of the tray body 101 and the notch of the base body 201 are of the same size and shape.

[0059] like Figure 1 and Figure 3 As shown, in a typical assembly state, the guide post 120 is inserted into the guide hole 220, the adjustment knob 300 is installed on the limit bracket 210, the threaded hole 310 is coaxial with the through hole 230, and the stud 130 is screwed with the threaded hole 310. In this state, the axial movement freedom of the adjustment knob 300 is limited by the limit bracket 210, and the radial movement freedom is limited by the stud 130, and it only has the freedom to rotate along the axis. When disassembly is required, the adjustment knob 300 is rotated until the stud 130 is completely screwed out of the threaded hole 310, and the tray 100 can be removed and the adjustment knob 300 can be further removed.

[0060] In a preferred embodiment, Figure 4As shown, the limiting bracket 210 specifically includes a plurality of limiting columns 211 and a plurality of limiting plates 212. The plurality of limiting columns 211 are arranged on the base body 201 and are located around the through hole 230. The plurality of limiting plates 212 are respectively arranged at the top ends of the plurality of limiting columns 211 and extend toward the through hole 230 to form a plurality of suspended portions. The plurality of suspended portions avoid the space above the through hole 230 to avoid interference with the stud 130. At the same time, a limited space is formed between the base 200 and the suspended portion of the limiting plate 212. The adjusting knob 300 is arranged in the aforementioned limited space, so that the displacement of the adjusting knob 300 in the vertical direction (axial direction) (relative to the base 200) is limited, so that when the adjusting knob 300 is rotated, the tray 100 can be driven to rise / lower relative to the base 200.

[0061] Further preferably, there are multiple guide holes 220 and they correspond one-to-one to the multiple limiting pillars 211; Figure 5 As shown, the guide hole 220 passes through the limiting plate 212, the limiting column 221 and the base body 201, which can maximize the effective length of the guide hole 220 and ensure the stability of the movement of the tray 100 and the horizontality when it is stationary.

[0062] In some embodiments, Figure 4 As shown, there are two limiting posts 211, which are symmetrically arranged on both sides of the through hole 230. In a further embodiment, the limiting bracket 210 further includes a connecting plate arranged between the limiting posts 211, and the connecting plate may more specifically include a first connecting plate 213 and / or a second connecting plate 214, and a hole is arranged on the connecting plate, and the hole is coaxially arranged with the aforementioned through hole 230, so that the stud 130 can also pass through the hole on the connecting plate. By providing the connecting plate, the firmness of the limiting bracket 210 can be improved.

[0063] In a preferred embodiment, Figure 4 As shown, a first connecting plate 213 is disposed between the limiting posts 211 , the first connecting plate 213 is disposed in close contact with the base body 201 , and has a hole disposed coaxially with the aforementioned through hole 230 . In a further embodiment, the first connecting plate 213 is formed integrally with the two limiting posts 211 .

[0064] In a preferred embodiment, Fig.10As shown, there are two connecting plates, specifically including a first connecting plate 213 and a second connecting plate 214. The first connecting plate 213 is arranged in close contact with the base body 201, and the second connecting plate 214 is connected to the two limiting plates 212 and arranged between the two limiting plates 212. Similar to the above-mentioned embodiment, the first connecting plate 213 and the second connecting plate 214 are both provided with holes coaxial with the through hole 230. In this embodiment, due to the first connecting plate 213 and the second connecting plate 214, the limiting bracket 210 is more solid than other embodiments, and the limiting of the adjusting knob 300 is more reliable. In a further embodiment, the second connecting plate 214 is formed integrally with the two limiting plates 212.

[0065] In a preferred embodiment, the limiting bracket 210 only includes the second connecting plate 214 disposed between the limiting plates 212 , that is, only the connecting plate is disposed above the adjusting knob 300 .

[0066] In an alternative embodiment, the first connecting plate 213 and the second connecting plate 214 may be omitted.

[0067] Furthermore, when there are more than two limiting columns 211, more connecting plates can be provided between the limiting columns 211, so as to further improve the firmness of the limiting bracket.

[0068] In a preferred embodiment, the tray body 101 and the base body 201 are circular with a notch; the stud 130 is disposed at the center of the tray body 101 , and the through hole 230 is disposed at the center of the base body 201 .

[0069] In a preferred embodiment, Figure 4 or Figure 8 As shown, the tray body 101 and the base body 201 are provided with the same V-shaped notch.

[0070] In a preferred embodiment, Figure 4 , Figure 5 As shown, the base body 201 is provided with a plurality of positioning holes 240 distributed in an annular shape, which are used for installation and fixing with threaded holes reserved on the laser value adjustment device by means of screws or bolts; the distribution and design of the positioning holes 240 correspond to the distribution and design of threaded holes reserved on the laser value adjustment device, and are not limited here.

[0071] Optionally, the adjustment knob 300 is in the shape of a perfect circle, an ellipse or a polygon. Figure 6As shown, the outer circumference of the adjusting knob 300 is provided with knurling 330 to facilitate its rotation. The polygon can be a hexagon or an octagon. In the embodiment where the base body 201, the adjusting knob 300 and the tray body 101 are all perfect circles, the through hole 230 and the threaded hole 310 are respectively arranged at the center of the circular base body 201 and the adjusting knob 300, and the stud 130 is located at the center of the second surface of the circular tray body 101.

[0072] In a preferred embodiment, Figure 6 , Figure 7 As shown, the fixture further includes a gasket 320, which is disposed between the adjusting knob 300 and the base 200, and the gasket 320 has an inner hole coaxially disposed with the threaded hole 310. The gasket 320 is conducive to reducing the friction between the base 200 and the adjusting knob 300, and is easy to operate.

[0073] In a preferred embodiment, Figure 7 As shown, two gaskets 320 are symmetrically arranged on both sides of the axial direction of the adjusting knob 300, that is, on the upper and lower sides of the adjusting knob 300 when the fixture is normally used, and the two gaskets 320 respectively have inner holes coaxially arranged with the threaded hole 310. Optionally, the two gaskets 320 are exactly the same (for example, the thickness, inner hole, etc. of the two gaskets 320 are the same). Optionally, the two gaskets 320 are integrally formed with the adjusting knob 300. By arranging two gaskets 320 on the upper and lower sides of the adjusting knob 300, it is possible to make it unnecessary to distinguish between the front and back of the adjusting knob 300 during installation.

[0074] The aforementioned structure with two washers is particularly suitable for the aforementioned embodiment with two connecting plates at the same time, and the upper and lower washers can respectively reduce the friction between the first connecting plate 213 and the second connecting plate 214. In a preferred embodiment, the washer 320 and the adjusting knob 300 are integrally formed, that is, integrally formed, and the inner hole of the washer 320 has the same and continuous thread as the threaded hole 310, which can guide the stud 130.

[0075] The present disclosure does not limit the positioning structure on the tray 100, as long as it can fix the semi-finished product to be adjusted during the adjustment process. In a preferred embodiment, Fig. 9 As shown, the positioning structure includes: a plurality of positioning screw holes 140 provided on the tray body 101, which are used to fix the semi-finished product to be adjusted by screws or bolts; a recessed area 111 on the first surface of the tray body 101, which is used to accommodate the welding points of the semi-finished product to be adjusted, and a support block 112 is provided in the recessed area 111, which is used to fully support the semi-finished product to be adjusted. The recessed area 111 can be a square groove, such as Fig. 9The support block 112 covers the center of the top of the tray 100 and partially extends to the edge of one side of the tray 100 and the V-shaped notch. The support block 112 can be selected as a plurality of square protrusions, which can be the same or different in size.

[0076] In order to fully disclose the fixture structure in this application, the following exemplary operation process using the above fixture is provided as follows:

[0077] (1) The operator opens the cabin of the laser value adjustment device and installs the function fine-tuning fixture. The direction of the V-shaped notch of the fixture is based on the convenience of the technician's operation. The positioning holes 240 on the base 200 correspond to the threaded holes reserved on the laser value adjustment device one by one, and are fixed with screws or bolts.

[0078] (2) Weld one end of the wire to the back of the semi-finished product to be adjusted, and connect the other end of the wire to an external testing instrument.

[0079] (3) The semi-finished product to be adjusted is placed on the tray 100, all the wires are pulled out from the V-shaped notch of the jig, and an insulating pad is placed between the solder joint position at the bottom of the semi-finished product to be adjusted and the recessed area 111 on the tray 100 to prevent short circuit; then the positioning holes of the semi-finished product to be adjusted are matched one by one with the positioning screw holes 140 on the tray 100, and they are fixed with screws or bolts to prevent the semi-finished product from moving during the function fine-tuning process.

[0080] (4) Rotate the adjustment knob 300 exposed at the V-shaped notch of the functional fine-tuning fixture to enable the tray 100 to achieve vertical movement in the up / down direction, and continue to adjust until the display on the laser value adjustment device can clearly see the resistance to be adjusted, thereby achieving laser focusing.

[0081] (5) Call the corresponding program of the equipment to start fine-tuning the function of the semi-finished product to be adjusted, that is, to make slight adjustments to the resistance value of the resistor that affects the circuit performance.

[0082] (6) When the semi-finished product meets the index requirements, complete the function fine-tuning.

[0083] (7) Turn off the power of the external testing instrument, open the laser value adjustment equipment, and take away the semi-adjusted products to be adjusted.

[0084] (8) After the function fine-tuning of the semi-finished product to be adjusted is completed, the function fine-tuning jig is removed.

[0085] The jig provided by the present disclosure can be used for thin-film hybrid integrated circuits, and is a mechanism for continuing to fine-tune the functions of semi-finished circuits that have been assembled in the circuit. For example, the jig of the present application can be applied to the laser resistance adjustment method, and the focusing purpose can be achieved by adjusting the relative height between the jig carrying the semi-finished product to be adjusted and the laser source. Specifically, by turning the adjustment knob, the stud connected to it can be driven to move vertically, and then the tray can be driven to rise / fall, so that the display on the laser value adjustment device can clearly see the resistance to be adjusted, thereby achieving laser focusing. At this time, the function of the semi-finished circuit to be adjusted can be fine-tuned. In other words, the resistance value of the resistor that affects the circuit performance can be slightly adjusted.

[0086] To sum up, the use of the fixture provided in the embodiment of the present disclosure not only has the function of assisting the laser adjustment equipment to realize the fine adjustment of the function of the semi-finished product to be adjusted, but also can solve the problem that the height of the semi-finished products to be fine-tuned of different models are inconsistent, and the height of the laser head needs to be repeatedly adjusted to achieve laser focusing, thereby preventing the incomplete laser etching of the resistance film in the semi-finished product to be adjusted due to inaccurate laser focal length, and further reducing the risk of partial detachment of the residual resistance film due to temperature stress.

[0087] The jig provided by the embodiments of the present disclosure effectively reduces unnecessary waste, thereby reducing production costs and improving product qualification rate.

[0088] The above description is only part of the specific implementation methods of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A function fine-tuning fixture, characterized in that: The invention comprises a tray (100), a base (200) and an adjusting knob (300), wherein: The tray (100) comprises a tray body (101), a positioning structure for placing a product to be adjusted located on a first surface of the tray body (101), and a guide column (120) and a stud (130) arranged on a second surface of the tray body (101) away from the positioning structure; The adjusting knob (300) is provided with a threaded hole (310); The base (200) comprises a base body (201), a limiting bracket (210) arranged on the base body (201), a guide hole (220) and a through hole (230); The tray (100) and / or the base (200) are provided with a notch for revealing at least a portion of the adjustment knob (300); The guide column (120) is inserted into the guide hole (220), the adjusting knob (300) is installed on the limiting bracket (210), the limiting bracket (210) is used to limit the axial displacement of the adjusting knob (300), and the threaded hole (310) is coaxial with the through hole (230) and is screwed to the stud (130).

2. The function fine-tuning fixture according to claim 1, characterized in that: The limiting bracket (210) comprises: A plurality of limiting columns (211) are arranged on the base body (201) and are located around the through hole (230); A plurality of limiting plates (212) are respectively arranged on the top ends of the plurality of limiting columns (211) and extend toward the through holes (230) to form a plurality of suspended portions.

3. The function fine-tuning fixture according to claim 2, characterized in that: There are a plurality of guide holes (220) corresponding one-to-one to the plurality of limit posts (211); the guide holes (220) penetrate the limit plate (212), the limit posts (211) and the base body (201).

4. The function fine-tuning fixture according to claim 3, characterized in that: There are two limit posts (211), which are symmetrically arranged on both sides of the through hole (230); The limiting bracket (210) further comprises a first connecting plate (213) and / or a second connecting plate (214), wherein: The first connecting plate (213) is arranged between the limiting columns (211), is fitted with the base body (201), and has a hole coaxially arranged with the through hole (230); The second connecting plate (214) is connected between the plurality of limiting plates (212) and has a hole coaxially arranged with the through hole (230).

5. The function fine-tuning fixture according to claim 1, characterized in that: The tray body (101) and the base body (201) are circular with a notch; the stud (130) is arranged at the center of the tray body (101), and the through hole (230) is arranged at the center of the base body (201).

6. The function fine-tuning jig according to claim 5, characterized in that: The tray body (101) and the base body (201) are provided with the same V-shaped notch; The base (200) further comprises a plurality of positioning holes (240) which are arranged on the base body (201) and are distributed in a ring shape.

7. The function fine-tuning jig according to claim 1, characterized in that: The adjusting knob (300) is in the shape of a perfect circle, an ellipse or a polygon; The outer peripheral side of the adjusting knob (300) is provided with knurling (330).

8. The function fine-tuning jig according to claim 1, characterized in that: It also includes a gasket (320) which is arranged between the adjusting knob (300) and the base (200), or symmetrically arranged on both axial sides of the adjusting knob (300), and the gasket has an inner hole which is coaxially arranged with the threaded hole (310).

9. The function fine-tuning jig according to claim 8, characterized in that: The gasket (320) is integrally formed with the adjusting knob (300), and the inner hole of the gasket (320) has a thread that is identical and continuous with the threaded hole (310).

10. The function fine-tuning fixture according to claim 1, characterized in that: The positioning structure comprises: A plurality of positioning screw holes (140) and a recessed area (111) are arranged on the first surface of the tray body (101), and a support block (112) is arranged in the recessed area (111).

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