Ear fork detection jig

Abstract

The utility model belongs to earphone's spare part detection tool technical field especially relates to ear fork detection fixture, including fixed part and drive part, the top of fixed part is equipped with with ear fork's connecting recess groove adaptation's step, the step slidingly connected has a plurality of sliding blocks, a plurality of sliding blocks with the embedding groove's circle center circle array of ear fork, outer end is equipped with arc top -notching, inner end with Drive part transmission connection, drive part can drive a plurality of arc top -notching outward expansion or inward contraction in the radial direction of embedding groove of ear fork. The application utilizes a plurality of sliding blocks to expand and move in the radial direction to detect whether the coaxiality defect exists between embedding groove and connecting recess groove, and then finds the defective product before assembling with the slide arm, which saves the step of removing defective products in the assembling process, and greatly improves the assembling efficiency of ear fork and slide arm.

Description

Technical Field

[0001] This utility model belongs to the technical field of headphone component testing tools, and particularly relates to an ear fork testing fixture. Background Technology

[0002] Over-ear headphones typically consist of a headband, two ear forks, and two ear cups, with speakers housed in the ear cups. The headband is worn on top of the head to complete the headset's fit. The two ear cups are mounted on the two ear forks, which are then attached to opposite ends of the headband. The ear forks are usually connected to the headband via hinges, allowing the ear cups to rotate relative to the headband. This adjustment of the ear cups allows for ear adjustment to accommodate the ears and achieve noise isolation.

[0003] For example, Chinese utility model patent CN202323625262.0 discloses an earphone fork sliding arm connection structure and a headphone (as described in paragraphs 0035 to 0039 of the specification). The earphone fork sliding arm connection structure is applied at the connection between the ear fork and the sliding arm, including a connecting protrusion, a connecting groove, and a retaining spring for limiting the axial displacement of the connecting protrusion and the connecting groove. The connecting protrusion is located at the end of the sliding arm, and the side wall of the connecting protrusion is provided with an assembly groove. The connecting groove is located at the end of the ear fork, and the inner wall of the connecting groove is provided with a fitting groove. However, this structure needs to ensure the coaxiality of the fitting groove and the connecting groove. Due to the small space of the connecting groove and the difficulty in measuring the size of the radially concave fitting groove, the coaxiality defect can only be found and reworked during the assembly process. There is an urgent need for a coaxiality testing tool. Utility Model Content

[0004] The purpose of this utility model is to provide an ear fork testing fixture, which aims to solve the technical problems in the prior art.

[0005] To achieve the above objectives, the ear fork detection fixture provided in this utility model embodiment includes a fixing member and a driving member. The top end of the fixing member is provided with a step that matches the connecting groove of the ear fork. The step is slidably connected to a plurality of sliders. The plurality of sliders are arranged in a circumferential array around the center of the ear fork's fitting groove, with an arc-shaped abutment at the outer end and a transmission connection to the driving member at the inner end. The driving member can drive the plurality of arc-shaped abutments to expand outward or contract inward in the radial direction of the ear fork's fitting groove.

[0006] Optionally, the top of the step is recessed with a fan-shaped groove corresponding to each of the sliders, and the outer end of the fan-shaped groove penetrates the side of the step and forms a through hole for the arc-shaped top to extend out.

[0007] Optionally, the driving component includes a rotating plate, a transmission rod, and a handle. The top of the step is provided with a rotating groove, and the fan-shaped sliding groove is recessed in the bottom wall of the rotating groove. The rotating plate is adapted to the rotating groove. The bottom end of the transmission rod is connected to the handle, the top end passes through the fixing member, and its end is connected to the center of the rotating plate. The top of the slider is provided with a protrusion, and the rotating plate is provided with an arc-shaped hollow groove. When the rotating plate moves in a circular motion, the hollow groove and the protrusion slide together.

[0008] Optionally, the convex point is a circular columnar body.

[0009] Optionally, there are three sliders in total, and the included angle between adjacent sliders is 120°.

[0010] Optionally, the fixing member is a circular cylindrical body arranged coaxially with the handle.

[0011] Optionally, the fixing member has a circular hole in the axial direction that rotatably engages with the transmission rod, and the handle has an assembly hole in the axial direction that is interference-fitted with the transmission rod.

[0012] Optionally, the side of the fastener is provided with a first marking line and a second marking line arranged at intervals along the circumferential direction, and the top of the handle is provided with an indicator line that can be aligned with the first marking line or the second marking line.

[0013] Optionally, the arc length of the hollowed-out groove is a, and the interval between the first marking line and the second marking line is b, where a = b.

[0014] Optionally, the handle has an anti-slip structure on its side.

[0015] The above-mentioned one or more technical solutions in the ear fork testing fixture provided in this utility model embodiment have at least one of the following technical effects: During testing, the ear fork is assembled with the step through the connecting groove and the fixing part. The driving part drives several sliders to expand outward and move the arc-shaped abutment to the side close to the fitting groove until they abut. During the process, the relative movement (such as tilting, shaking, etc.) of the ear fork shell with the step is observed to obtain information on whether the arc-shaped abutment can be smoothly inserted into the fitting groove. When the arc-shaped abutment is smoothly inserted into the fitting groove, it is concluded that the coaxiality of the fitting groove and the connecting groove meets the standard. Otherwise, it is concluded that the coaxiality of the fitting groove and the connecting groove does not meet the standard. Compared with the prior art, this application uses several sliders to expand and move in the radial direction to detect whether there is a coaxiality defect between the fitting groove and the connecting groove, and then discovers defective products before it is assembled with the sliding arm, eliminating the step of removing defective products during the assembly process and greatly improving the assembly efficiency of the ear fork and the sliding arm. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is one of the structural schematic diagrams of the ear fork detection fixture provided in an embodiment of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the longitudinal section.

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] Figure 4 The second schematic diagram of the ear fork detection fixture provided in this embodiment of the utility model.

[0021] Figure 5 for Figure 4 A schematic diagram of the longitudinal section.

[0022] Figure 6 for Figure 5 A magnified view of a section at point B in the middle.

[0023] Figure 7 This is an exploded view of the components of the ear fork testing fixture provided in an embodiment of the present invention.

[0024] The following are the labeling elements in the figure:

[0025] 1—Fixed component; 11—Step; 111—Sector-shaped slide groove

[0026] 112—Through hole; 113—Rotating groove; 12—Slider

[0027] 121—Arched top; 122—Protrusion; 13—Round hole

[0028] 14—First Marker Line 15—Second Marker Line

[0029] 2—Driver component 21—Rotating plate 211—Hollowed groove

[0030] 22—Transmission rod 23—Handle 231—Assembly hole

[0031] 232—Indicator line; 233—Anti-slip structure

[0032] 3—Ear fork 31—Connecting groove 32—Matching groove. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0037] In one embodiment of this utility model, such as Figures 1-7As shown, an ear fork testing fixture is provided, including a fixing member 1 and a driving member 2. The top end of the fixing member 1 is provided with a step 11 that matches the connecting groove 31 of the ear fork 3. The step 11 is slidably connected to a plurality of sliders 12. The plurality of sliders 12 are arranged in a circular array around the center of the fitting groove 32 of the ear fork 3, with an arc-shaped abutment 121 at the outer end and a transmission connection to the driving member 2 at the inner end. The driving member 2 can drive the plurality of arc-shaped abutments 121 to expand outward or contract inward in the radial direction of the fitting groove 32 of the ear fork 3. During testing, the ear fork 3 is assembled with the step 11 via the connecting groove 31 and the fixing part 1. The driving part 2 drives several sliders 12 to expand outward, causing the arc-shaped abutment 121 to move towards the side close to the fitting groove 32 until it abuts. During the process, the relative movement (such as tilting or shaking) between the ear fork 3 and the step 11 is observed to obtain information on whether the arc-shaped abutment 121 can be smoothly inserted into the fitting groove 32. When the arc-shaped abutment 121 is smoothly inserted into the fitting groove 32, it is concluded that the coaxiality between the fitting groove 32 and the connecting groove 31 meets the standard; otherwise, it is concluded that the coaxiality between the fitting groove 32 and the connecting groove 31 does not meet the standard. In this embodiment, several sliders 12 expand and move in the radial direction to detect whether there is a coaxiality defect between the fitting groove 32 and the connecting groove 31, thereby discovering defective products before it is assembled with the sliding arm, eliminating the step of removing defective products during the assembly process, and greatly improving the assembly efficiency of the ear fork 3 and the sliding arm. Specifically, in this embodiment, the step 11 and the rotating plate are assembled into the contoured part of the connecting protrusion in patent document CN202323625262.0. The radial sliding of the three sliders 12 simulates the deformation of the retaining spring, so as to ensure that the retaining spring can be smoothly installed into the fitting groove 32 during the assembly process after the ear fork 3 has passed the test of this embodiment.

[0038] In one embodiment of this utility model, such as Figure 7 As shown, the top of the step 11 is recessed with a fan-shaped groove 111 corresponding to the slider 12. The outer end of the fan-shaped groove 111 penetrates the side of the step 11 and forms a through hole 112 for the arc-shaped abutment 121 to extend out. Specifically, the slider 12 is a fan-shaped block adapted to the fan-shaped groove 111, and its arc-shaped abutment 121 protrudes out through the through hole 112 and is exposed on the outside of the step 11.

[0039] In one embodiment of this utility model, such as Figures 1-6As shown, the driving component 2 includes a rotating plate 21, a transmission rod 22, and a handle 23. A rotating groove 113 is formed at the top of the step 11, and a fan-shaped sliding groove 111 is recessed into the bottom wall of the rotating groove 113. The rotating plate 21 is adapted to the rotating groove 113. The bottom end of the transmission rod 22 is connected to the handle 23, its top end passes through the fixing component 1, and its end is connected to the center of the rotating plate 21. A protruding point 122 is provided on the top of the slider 12, and an arc-shaped hollow groove 211 is formed on the rotating plate 21. When the rotating plate 21 moves in a circular motion, the hollow groove 211 and the protruding point 122 slide in cooperation. Specifically, during operation, rotating the handle 23 causes the rotating plate 21 to rotate and engage with the rotating groove 113 via the transmission rod 22. When the rotating plate 21 rotates, it presses against the protruding point 122 through the hollow groove 211. The protruding point 122 moves along an arc and slides radially in cooperation with the fan-shaped sliding groove 111.

[0040] In one embodiment of this utility model, such as Figure 1 As shown, the protrusion 122 is a circular columnar body. Specifically, the edgeless design reduces friction between the protrusion and the hollowed-out groove 211.

[0041] In one embodiment of this utility model, such as Figure 7 As shown, there are three sliders 12 in total, and the included angle between adjacent sliders 12 is 120°.

[0042] In one embodiment of this utility model, such as Figure 1 As shown, the fixing member 1 and the handle 23 are coaxially arranged in a circular cylindrical shape, facilitating operation.

[0043] In one embodiment of this utility model, such as Figure 2 As shown, the fixing member 1 has a circular hole 13 in the axial direction that rotates with the transmission rod 22, and the handle 23 has an assembly hole 231 in the axial direction that is interference-fitted with the transmission rod 22.

[0044] In one embodiment of this utility model, such as Figure 1 and 4 As shown, the side of the fixing member 1 is provided with a first marking line 14 and a second marking line 15 arranged at intervals along the circumferential direction. The top of the handle 23 is provided with an indicator line 232 that can be aligned with the first marking line 14 or the second marking line 15. By observing the positional relationship between the indicator line 232 and the first marking line 14 or the second marking line 15, information feedback on whether the slider 12 slides relative to the fan-shaped groove 111 can be obtained, providing a more intuitive display of the detection results.

[0045] In one embodiment of this utility model, such as Figures 1-3As shown, the arc length of the hollow groove 211 is a, and the interval between the first marking line 14 and the second marking line 15 is b, where a = b. Specifically, if a jam occurs during the rotation of the handle 23 and the indicator line 232 is located between the first marking line 14 and the second marking line 15, it indicates that the coaxiality of the connecting groove 31 and the fitting groove 32 of the ear fork 3 is not up to standard.

[0046] In one embodiment of this utility model, such as Figure 1 As shown, the handle 23 has an anti-slip structure 233 on its side. Specifically, the anti-slip structure 233 is a circumferential array of strip-shaped protrusions on the side of the handle 23.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ear fork testing fixture, characterized in that: It includes a fixing component and a driving component. The top of the fixing component is provided with a step that matches the connecting groove of the ear fork. The step is slidably connected to a number of sliders. The number of sliders are arranged in a circular array around the center of the ear fork's fitting groove. The outer end is provided with an arc-shaped abutment, and the inner end is connected to the driving component. The driving component can drive the number of arc-shaped abutments to expand outward or contract inward in the radial direction of the ear fork's fitting groove.

2. The ear fork detection fixture according to claim 1, characterized in that: The top of the step is recessed with a fan-shaped groove that corresponds to the slider. The outer end of the fan-shaped groove penetrates the side of the step and forms a through hole for the arc-shaped top to extend out.

3. The ear fork detection fixture according to claim 2, characterized in that: The driving component includes a rotating plate, a transmission rod, and a handle. The top of the step has a rotating groove, and the fan-shaped sliding groove is recessed in the bottom wall of the rotating groove. The rotating plate is adapted to the rotating groove. The bottom end of the transmission rod is connected to the handle, the top end passes through the fixing member, and its end is connected to the center of the rotating plate. The top of the slider has a protruding point, and the rotating plate has an arc-shaped hollow groove. When the rotating plate moves in a circular motion, the hollow groove and the protruding point slide together.

4. The ear fork detection fixture according to claim 3, characterized in that: The protrusion is a circular column.

5. The ear fork detection fixture according to claim 3, characterized in that: There are three sliders in total, and the included angle between adjacent sliders is 120°.

6. The ear fork detection fixture according to claim 3, characterized in that: The fixing member is a circular cylindrical body arranged coaxially with the handle.

7. The ear fork detection fixture according to claim 6, characterized in that: The fixing member has a circular hole along the axial direction that rotatably engages with the transmission rod, and the handle has an assembly hole along the axial direction that is interference-fitted with the transmission rod.

8. The ear fork detection fixture according to claim 6, characterized in that: The side of the fastener is provided with a first marking line and a second marking line arranged at intervals along the circumference, and the top of the handle is provided with an indicator line that can be aligned with the first marking line or the second marking line.

9. The ear fork detection fixture according to claim 8, characterized in that: The arc length of the hollowed-out groove is a, and the interval between the first marking line and the second marking line is b, where a = b.

10. The ear fork detection fixture according to claim 6, characterized in that: The handle has an anti-slip structure on its side.

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