Double-positioning type audio test fixture

Abstract

The utility model provides a double-positioning type audio test fixture, which belongs to the technical field of audio electronic equipment test and is characterized in that a guide pin is arranged between a floating plate and a sound cavity cover, and the floating plate is far away from or close to the sound cavity cover along the guide pin; the floating plate is provided with a mounting groove and a positioning arc, the positioning arc is communicated with the mounting groove, the mounting groove extends to one side of the floating plate, the sound cavity cover is provided with a profiling positioning groove, the profiling positioning groove is arranged below the floating plate, a lower shell is arranged in the profiling positioning groove, and an upper shell is arranged in the mounting groove and the positioning arc; the lower shell can enter the profiling positioning groove formed in the sound cavity cover according to needs, meanwhile, the upper shell reaches the positioning arc along the mounting groove and reaches the testing position of a product, product mounting and positioning are achieved, and during testing, the floating plate tightly presses the lower shell in the direction of the guide pin, so that the product is prevented from being damaged. The test positioning of the product is realized due to the change of the position of the plugging test device in the test process of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of audio electronic equipment testing, in particular to a double-positioning audio testing fixture. Background Art

[0002] After the electronic products, such as personal portable products (earphones, mobile phones) and automotive acoustic modules (microphones, Bluetooth headsets), are assembled in the factory, they need to undergo performance tests and pass the tests before they can be shipped. The above electronic products all involve the testing of MIC audio parameters (including semi-finished product testing procedures and finished product testing procedures) to ensure that the product MIC audio parameters are within the design requirements.

[0003] Since the shape of audio components in the industry is generally rectangular or square, this type of product requires a contoured seat with the largest shape to achieve product positioning. After the product is pressed, the MIC audio module is powered by a probe or connector, and the sound cavity makes a sound. The MIC sound hole of the MIC audio module faces the sound cavity to receive the sound of the speaker in the sound cavity. The sound is transmitted to the MIC and converted into an electrical signal. The test software then processes the electrical signal, and then compares it with the electrical signal of the standard product to determine whether it is qualified, completing the product performance test. In the above-mentioned products, the MIC monomer is assembled into a MIC module circuit board by SMT patch, welding and other processes with PCB, MIC and other components, and then the MIC circuit board and the product shell are assembled into an integrated audio module. Due to the characteristics of the dimensional tolerance of the above-mentioned products, the assembly of the MIC module circuit board and the product shell will have parameter differences due to the randomness of the structural matching. For example, audio sealing, FR, product consistency, etc. must reach a certain parameter range to be qualified. The product parameters are measured within a certain range to be qualified products, otherwise they are defective products. This requires the product to have good positioning accuracy and repeated placement positioning consistency in the test fixture. The existing positioning method is only suitable for products with rectangular or non-circular shapes. For products with circular shapes, the products will rotate in a circle and cannot be tested at a fixed position and angle, making it difficult to ensure the accuracy and consistency of the test. In addition, because the product needs to be connected to the carrier board by plugging and unplugging during the test, the product is very likely to move or rotate during the plugging and unplugging process, resulting in reduced accuracy and consistency of the test.

[0004] Therefore, there is an urgent need for a fixture that is not limited by its shape and will not move or rotate during the test process. Utility Model Content

[0005] In view of this, the utility model proposes a double-positioning beverage testing fixture for performing installation positioning during product testing and positioning during testing.

[0006] The technical solution of the utility model is achieved as follows: a double-positioning audio test fixture comprises a sound cavity cover and a floating plate, a guide pin is arranged between the floating plate and the sound cavity cover, and the floating plate moves away from or approaches the sound cavity cover along the guide pin; a mounting groove and a positioning arc are arranged on the floating plate, the positioning arc is connected with the mounting groove, and the mounting groove extends to one side of the floating plate, a contoured positioning groove is arranged on the sound cavity cover, the contoured positioning groove is arranged below the floating plate, a lower shell is arranged in the contoured positioning groove, and an upper shell is arranged in the mounting groove and the positioning arc.

[0007] On the basis of the above technical solution, preferably, the lower shell body and the contoured positioning groove are both circular, and the lower shell body is provided with a first positioning block and a second positioning block, the first positioning block is arranged in the installation groove, and one side of the first positioning block is close to one end of the positioning arc, and the second positioning block is arranged in the installation groove, and one side of the second positioning block is close to the other end of the positioning arc.

[0008] On the basis of the above technical solution, preferably, the upper shell is provided with a guide bar and a buckle, and the lower shell is provided with a guide groove and a buckle. The guide bar is slidably arranged in the guide groove, and the buckle is snapped in the buckle groove.

[0009] On the basis of the above technical solution, preferably, a guide hole is provided on the floating plate, a guide fixing hole is provided on the sound cavity cover, and one end of the guide pin passes through the guide hole and the other end is fixed in the guide fixing hole.

[0010] On the basis of the above technical solution, preferably, it also includes a sleeve and a spring, wherein the sleeve and the spring are both sleeved on the guide pin, the sleeve is arranged in the guide hole, and the spring is arranged between the sleeve and the sound cavity cover.

[0011] On the basis of the above technical solution, preferably, it further comprises a positioning protrusion, which is arranged on a side of the floating plate facing the contoured positioning groove, and the positioning protrusion is arranged in cooperation with the lower shell.

[0012] On the basis of the above technical solution, preferably, a sealing foam is provided between the lower shell and the contoured positioning groove.

[0013] On the basis of the above technical solution, preferably, it also includes a pressing bracket, a pressing cylinder and a pressing plate, the pressing bracket is arranged on the sound cavity cover, the pressing cylinder is arranged on the pressing bracket, and the pressing cylinder drives the pressing plate to move away from or approach the floating plate.

[0014] On the basis of the above technical scheme, preferably, it also includes a plug-in port, a wire protection plate, a plug-in carrier plate and a plug-in cylinder, the plug-in cylinder is arranged on the sound cavity cover, the plug-in port is arranged at one end of the plug-in carrier plate facing the upper shell body, the plug-in carrier plate is arranged on the plug-in cylinder, and the plug-in cylinder drives the plug-in port to approach or move away from the upper shell body; a test port is arranged on the upper shell body, a PIN pin is arranged in the test port, the plug-in port and the test port are arranged in coordination, and when the plug-in port is close to the upper shell body, the plug-in port is inserted into the test port.

[0015] On the basis of the above technical solution, preferably, it also includes a sound cavity assembly, and the sound cavity cover is fixedly arranged on the sound cavity assembly.

[0016] The dual-positioning audio test fixture of the utility model has the following beneficial effects compared with the prior art:

[0017] When the product is placed in the test fixture, the floating plate moves away from the sound cavity cover along the guide pins. At this time, an installation gap is left between the floating plate and the sound cavity cover, and the lower shell can enter the contoured positioning groove set on the sound cavity cover as needed. At the same time, the upper shell reaches the positioning arc along the installation groove and reaches the test position of the product, thereby realizing product installation and positioning. When testing, the floating plate presses the lower shell along the direction of the guide pins to prevent the product from changing its position due to the plug-in test device during the test process, thereby realizing product test positioning. The test fixture uses product installation positioning and test positioning to ensure the accuracy and consistency of the test.

[0018] The contact area between the floating plate and the lower shell is large, which reduces the damage to the workpiece during the test and increases the positioning accuracy.

[0019] The width of the mounting groove is greater than the diameter of the positioning arc, so when the first positioning block and the second positioning block are respectively close to one end of the positioning arc, the rotation of the product is restricted, and the positioning of the entire product is more accurate. Only when the positioning accuracy of the product is improved can the accuracy and consistency of the test be achieved, and the test results can be avoided from being affected by inaccurate positioning;

[0020] The upper shell and the lower shell are designed separately. In order to better install the upper shell and the lower shell, we use the guide bar to slide in the guide groove for installation guidance, and use the buckle to snap into the card slot to connect the upper shell and the lower shell into a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a stereogram of a dual-positioning audio test fixture of the utility model;

[0023] Figure 2 For this utility model Figure 1 A three-dimensional diagram of the local structure;

[0024] Figure 3 For this utility model Figure 2 A cross-sectional view of

[0025] Figure 4 For this utility model Figure 2 Exploded diagram of

[0026] Figure 5 A three-dimensional diagram of the product of the utility model;

[0027] Figure 6 For this utility model Figure 5 Top view of the . DETAILED DESCRIPTION

[0028] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-6As shown, a double-positioning audio test fixture includes a sound cavity cover 75 and a floating plate 72, wherein a guide pin 74 is arranged between the floating plate 72 and the sound cavity cover 75, and the floating plate 72 moves away from or approaches the sound cavity cover 75 along the guide pin 74; the floating plate 72 is provided with a mounting groove 721 and a positioning arc 722, the positioning arc 722 is connected to the mounting groove 721, and the mounting groove 721 extends to one side of the floating plate 72, and the sound cavity cover 75 is provided with a contoured positioning groove 77, the contoured positioning groove 77 is arranged below the floating plate 72, a lower shell 11 is arranged in the contoured positioning groove 77, and an upper shell 12 is arranged in the mounting groove 721 and the positioning arc 722. The product includes an upper shell 12 and a lower shell 11. When the product is placed in the test fixture, the floating plate 72 moves away from the sound cavity cover 75 along the guide pin 74. At this time, an installation gap is left between the floating plate 72 and the sound cavity cover 75, and the lower shell 11 can enter the contoured positioning groove 77 set on the sound cavity cover 75 as needed. At the same time, the upper shell 12 reaches the positioning arc 722 along the installation groove 721 and reaches the test position of the product, realizing the installation and positioning of the product; when testing, the floating plate 72 presses the lower shell 11 along the direction of the guide pin 74 to prevent the product from changing its position due to the plug-in test device during the test process, realizing the test positioning of the product. The test fixture uses product installation positioning and test positioning to ensure the accuracy and consistency of the test. The floating plate 72 has a large contact area with the lower shell 11, which causes less damage to the workpiece during the test and has higher positioning accuracy.

[0030] When the lower shell 11 and the contoured positioning groove 77 are both circular, the lower shell 11 is easily rotated axially when it is placed in the contoured positioning groove 77. In order to avoid axial rotation, the lower shell 11 is provided with a first positioning block 113 and a second positioning block 114. The first positioning block 113 is arranged in the mounting groove 721, and one side of the first positioning block 113 is close to one end of the positioning arc 722. The second positioning block 114 is arranged in the mounting groove 721, and one side of the second positioning block 114 is close to the other end of the positioning arc 722. The width of the mounting groove 721 is greater than the diameter of the positioning arc 722, so when the first positioning block 113 and the second positioning block 114 are respectively close to one end of the positioning arc 722, the rotation of the product is restricted, and the positioning of the entire product is more accurate. Only when the positioning accuracy of the product is improved can the accuracy and consistency of the test be achieved, and the test results are not affected due to inaccurate positioning.

[0031] The upper shell 12 is provided with a guide bar 121 and a buckle 122, and the lower shell 11 is provided with a guide groove 111 and a buckle 122. The guide bar 121 is slidably arranged in the guide groove 111, and the buckle 122 is snapped into the buckle 112. The upper shell 12 and the lower shell 11 are designed separately. In order to better install the upper shell 12 and the lower shell 11, we use the guide bar 121 to be slidably arranged in the guide groove 111 for installation guidance, and use the buckle 122 to snap into the buckle 122 to connect the upper shell 12 and the lower shell 11 into a whole.

[0032] The floating plate 72 is provided with a guide hole 723, and the sound cavity cover 75 is provided with a guide fixing hole 751. One end of the guide pin 74 passes through the guide hole 723 and the other end is fixedly set in the guide fixing hole 751. In order to realize the positioning function of the floating plate 72 during the detection process, the installation position of the guide pin 74 is particularly critical, and a distance gap needs to be reserved between the floating plate 72 and the sound cavity cover 75 to facilitate the installation of the lower shell 11 into the contoured positioning groove 77. This embodiment utilizes a method in which one end of the guide pin 74 passes through the floating plate 72 and is then fixedly set on the sound cavity cover 75.

[0033] It also includes a sleeve 76 and a spring 73, both of which are sleeved on the guide pin 74, the sleeve 76 is arranged in the guide hole 723, and the spring is arranged between the sleeve 76 and the sound cavity cover 75. In order to achieve positioning during the detection process and facilitate the installation of the lower shell 11 into the contoured positioning groove 77, we set the sleeve 76 between the guide pin 74 and the guide hole 723, and the spring 73 between the sleeve 76 and the sound cavity cover 75. When the floating plate 72 is in a natural state, the spring 73 applies an external force to the floating plate 72, so that the floating plate 72 maintains a certain distance from the sound cavity cover 75, which is convenient for installing the lower shell 11 into the contoured positioning groove 77. When testing, the external force exerted downward on the floating plate 72 can firmly fix the lower shell 11 in the contoured positioning groove 77, thereby achieving accurate positioning during the test process and improving the stability and consistency of the product test results.

[0034] It also includes a positioning protrusion 71, which is arranged on the side of the floating plate 72 facing the contour positioning groove 77. The positioning protrusion 71 is arranged in cooperation with the lower shell 11. In order to prevent the floating plate 72 from failing to press the lower shell 11, we arrange the positioning protrusion 71 on the side of the floating plate 72 facing the contour positioning groove 77 to reduce the moving distance of the floating plate 72 and improve the positioning accuracy.

[0035] A sealing foam 78 is provided between the lower shell 11 and the contoured positioning groove 77. The sealing foam 78 plays a sealing and buffering role to prevent bubbles from being generated between the lower shell 11 and the contoured positioning groove 77 to affect the positioning result. In addition, it prevents the external force applied during the downward movement of the floating plate 72 from increasing instantaneously and damaging the lower shell 11.

[0036] It also includes a pressing bracket 41, a pressing cylinder 42 and a pressing plate 43. The pressing bracket 41 is arranged on the sound cavity cover 75, and the pressing cylinder 42 is arranged on the pressing bracket 41. The pressing cylinder 42 drives the pressing plate 43 to move away from or close to the floating plate 72. The external force of the floating plate 72 pressing down on the lower shell 11 comes from the pressing cylinder 42. The pressing cylinder 42 drives the pressing plate 43 to move toward the floating plate 72, so that the lower shell 11 reaches a predetermined position, which plays a positioning effect.

[0037] It also includes a plug-in port 61, a wire protection plate 62, a plug-in carrier plate 63 and a plug-in cylinder 64. The plug-in cylinder 64 is arranged on the sound cavity cover 75. The plug-in port 61 is arranged at one end of the plug-in carrier plate 63 facing the upper shell 12. The plug-in carrier plate 63 is arranged on the plug-in cylinder 64. The plug-in cylinder 64 drives the plug-in port 61 to approach or move away from the upper shell 12. The upper shell 12 is provided with a test port 123, and a PIN pin 124 is arranged in the test port 123. The plug-in port 61 is matched with the test port 123. When the plug-in port 61 approaches the upper shell 12, the plug-in port 61 is inserted into the test port 123. It also includes a sound cavity assembly 1, and the sound cavity cover 75 is fixedly arranged on the sound cavity assembly 1.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-positioning audio test fixture, comprising a sound cavity cover (75), characterized in that: The invention also comprises a floating plate (72), wherein a guide pin (74) is arranged between the floating plate (72) and the sound cavity cover (75), and the floating plate (72) moves away from or approaches the sound cavity cover (75) along the guide pin (74); the floating plate (72) is provided with a mounting groove (721) and a positioning arc (722), the positioning arc (722) is connected to the mounting groove (721), and the mounting groove (721) extends to one side of the floating plate (72); the sound cavity cover (75) is provided with a contoured positioning groove (77), the contoured positioning groove (77) is arranged below the floating plate (72), a lower shell (11) is arranged in the contoured positioning groove (77), and an upper shell (12) is arranged in the mounting groove (721) and the positioning arc (722).

2. A dual-positioning audio test fixture as claimed in claim 1, characterized in that: The lower shell (11) and the contoured positioning groove (77) are both circular. The lower shell (11) is provided with a first positioning block (113) and a second positioning block (114). The first positioning block (113) is arranged in the mounting groove (721), and one side of the first positioning block (113) is in close contact with one end of the positioning arc (722). The second positioning block (114) is arranged in the mounting groove (721), and one side of the second positioning block (114) is in close contact with the other end of the positioning arc (722).

3. A dual-positioning audio test fixture as claimed in claim 1, characterized in that: The upper shell (12) is provided with a guide strip (121) and a buckle (122), and the lower shell (11) is provided with a guide groove (111) and a buckle (112); the guide strip (121) is slidably arranged in the guide groove (111), and the buckle (122) is buckled in the buckle groove (112).

4. A dual-positioning audio test fixture as claimed in claim 1, characterized in that: The floating plate (72) is provided with a guide hole (723), the sound cavity cover (75) is provided with a guide fixing hole (751), and one end of the guide pin (74) passes through the guide hole (723) and the other end is fixedly arranged in the guide fixing hole (751).

5. The dual-positioning audio test fixture according to claim 1, characterized in that: It also includes a shaft sleeve (76) and a spring (73), wherein the shaft sleeve (76) and the spring (73) are both sleeved on the guide pin (74), the shaft sleeve (76) is arranged in the guide hole (723), and the spring is arranged between the shaft sleeve (76) and the sound cavity cover (75).

6. A dual-positioning audio test fixture as claimed in claim 1, characterized in that: It also includes a positioning protrusion (71), which is arranged on a side of the floating plate (72) facing the contoured positioning groove (77), and the positioning protrusion (71) is arranged in cooperation with the lower shell (11).

7. A dual-positioning audio test fixture as claimed in claim 6, characterized in that: A sealing foam (78) is provided between the lower shell (11) and the contoured positioning groove (77).

8. The dual-positioning audio test fixture according to claim 1, characterized in that: It also includes a pressing bracket (41), a pressing cylinder (42) and a pressing plate (43); the pressing bracket (41) is arranged on the sound cavity cover (75); the pressing cylinder (42) is arranged on the pressing bracket (41); and the pressing cylinder (42) drives the pressing plate (43) to move away from or approach the floating plate (72).

9. The dual-positioning audio test fixture according to claim 1, characterized in that: The device also comprises a plug-in port (61), a wire protection plate (62), a plug-in carrier plate (63) and a plug-in cylinder (64); the plug-in cylinder (64) is arranged on the sound cavity cover (75); the plug-in port (61) is arranged at one end of the plug-in carrier plate (63) facing the upper shell (12); the plug-in carrier plate (63) is arranged on the plug-in cylinder (64); the plug-in cylinder (64) drives the plug-in port (61) to approach or move away from the upper shell (12); a test port (123) is arranged on the upper shell (12); a PIN pin (124) is arranged in the test port (123); the plug-in port (61) and the test port (123) are arranged in coordination; when the plug-in port (61) approaches the upper shell (12), the plug-in port (61) is inserted into the test port (123).

10. The dual-positioning audio test fixture according to claim 1, characterized in that: It also comprises a sound cavity component (1), wherein the sound cavity cover (75) is fixedly arranged on the sound cavity component (1).

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