Equipment and method for assembling structural member and spring applied to earphone suspension

Abstract

The invention relates to the field of product assembling, in particular to assembling equipment applied to a structural part and a spring of an earphone suspension. The assembling equipment comprises an assembling jig and an assembling actuator. The assembling jig comprises an upper jig body and a lower jig body which can move relatively, an upper assembling groove and a lower assembling groove are formed in the adjacent ends of the upper jig body and the lower jig body respectively, and the upper jig body moves towards the lower jig body, so that the upper assembling groove and the lower assembling groove are spliced to form an assembling channel for the spring to move in the axial direction. The assembly actuator is connected with a driving element, and the driving element and the push spring move in the assembly channel; the lower jig is provided with a stop through groove corresponding to the protruding part and parallel to the assembling channel, a stop element matched with the driving element is arranged, and the stop element and the driving element are both driven by the assembling actuator to act synchronously. The distance between the stopping end of the stopping element and the protruding part corresponds to the remaining stroke of the driving element.

Description

Technical Field

[0001] This invention relates to the field of product assembly, and more particularly to equipment and methods for assembling structural components and springs used in headphone suspensions. Background Technology

[0002] The headphones consist of two parts: a headband and two speaker units that are rotatably connected at both ends of the headband.

[0003] In the existing technology, headbands are generally made of elastic plastic sheets as the main body, covered with fabric or leather. The headband and speaker unit are often hinged in the form of a pivot. By the elastic deformation of the headband, the function of changing the distance between a pair of speaker units can be realized, thereby adapting to different wearers' head shapes and clothing.

[0004] However, this single elastic deformation structure has a large range of elasticity changes, which makes it uncomfortable to wear. Some headphones choose to add a suspension module at the pivot point between the headband and the speaker unit. This suspension module is a suspension structure composed of at least two structural components connected by hinges and springs. Compared with the traditional single headband deformation, this multi-set deformation structure helps to improve the comfort of the wearer.

[0005] However, the above-mentioned technologies have at least the following technical problems: The compact design of the headphone hinge results in a very small suspension structure, which in turn leads to even smaller springs. These extremely small springs are difficult to position during assembly and are prone to popping out, posing significant challenges to the assembly of the suspension structure. Summary of the Invention

[0006] The purpose of this invention is to provide an assembly device and method for structural components and springs used in headphone suspensions, so as to solve the problem of difficult assembly of small springs used in headphone suspensions in the prior art.

[0007] The technical solution of the present invention is: an assembly device for a structural component and a spring of an earphone suspension, wherein a protrusion is formed on the structural component, a connecting through hole is formed above the protrusion, and a connecting rod for the spring to be sleeved is installed through the connecting through hole; the assembly device includes: An assembly fixture includes an upper fixture and a lower fixture that are movable relative to each other. The upper fixture and the lower fixture are respectively provided with an upper assembly groove and a lower assembly groove at their adjacent ends. The upper fixture moves toward the lower fixture, so that the upper assembly groove and the lower assembly groove are joined together to form an assembly channel for the spring to move axially. An assembly actuator is connected to a drive element, which moves in the assembly channel with a push spring. The lower fixture has a stop groove corresponding to the protrusion and parallel to the assembly channel. A stop element is provided to cooperate with the drive element. The stop element and the drive element are driven synchronously by the assembly actuator. The distance between the stop end of the stop element and the protrusion corresponds to the remaining stroke of the drive element.

[0008] Preferably, the walls adjacent to the upper assembly slot and the lower assembly slot are respectively constructed as an upper fixture limiting surface and a lower fixture limiting surface, and the assembly channel is formed in the contact state between the upper fixture limiting surface and the lower fixture limiting surface. The lower fixture has a thin-walled structure formed between the lower assembly groove and the stop groove. The upper wall surface of the stop element perpendicular to the stop end is constructed as a support end. When the upper fixture limiting surface generates an impact on the lower fixture limiting surface, the support end supports the thin-walled structure.

[0009] Preferably, the material feeding channel has a connecting assembly channel, and the structural component is placed at the end of the material feeding channel away from the assembly channel; The connection between the feeding channel and the assembly channel is set as the assembly station; the feeding driver and the upper fixture that drive the structural component to move along the feeding channel are respectively abutted against the two ends of the structural component, so that the structural component is fixed at the assembly station.

[0010] Preferably, the upper fixture is connected to a rotary lifting module, which can drive the upper fixture to perform lifting and lowering actions and swing around a vertical axis, so that a channel is formed above the lower assembly slot for the spring to be inserted vertically.

[0011] Preferably, the driving element is configured as an elongated rod-shaped structure; The stop element is constructed as a plate-like structure, and the stop end is provided with a protrusion that adapts to the arc-shaped outer edge of the protrusion.

[0012] Preferably, a guide block is fixed at one end of the lower fixture near the assembly actuator. The guide block has a through hole through which the driving element and the stop element pass. The inner wall of the through hole provides support for the end of the driving element and the stop element away from the assembly actuator.

[0013] Preferably, the driving elements are arranged in a pair in parallel, and the upper fixture limiting surface and the lower fixture limiting surface are respectively located between a pair of upper assembly slots and a pair of lower assembly slots.

[0014] Preferably, the assembly method of the structural component and spring used in the headphone suspension includes the following steps: Step 1: The rotating lifting module drives the upper fixture to rise and rotate sequentially, causing the upper assembly slot to separate from the lower assembly slot and exposing the lower assembly slot; at the same time, the structural component is placed into the feeding channel at the end away from the lower assembly slot. Step 2: Place the spring into the lower assembly slot, then rotate the lifting module to reset, forming an assembly channel; at the same time, drive the feeding driver to push the structural component into the assembly station along the feeding channel. Step 3: Start the assembly actuator so that the drive element and the stop element move along the assembly channel and the stop through slot respectively, pushing the spring into the connecting rod of the structural component until the stop element abuts against the protrusion.

[0015] Compared with the prior art, the advantages of the present invention are: (1) This application uses a circumferentially closed assembly channel formed by the combination of the upper fixture and the lower fixture to restrict the displacement of the spring during the assembly process to move axially in a horizontal position, thereby solving the problem of the small spring flying out due to the attitude deflection while the assembly actuator continuously applies driving force during the assembly process, and improving the assembly success rate.

[0016] (2) This application constructs a support end on the stop element and extends the support end below the thin-walled area for support. This allows the stop element to limit the stroke of the drive element while also maintaining the stability of the lower fixture structure, thereby ensuring the dimensional accuracy and stability of the assembly channel when the upper and lower fixtures are closed. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structural component described in this invention; Figure 2 This is a schematic diagram of the assembly of the spring and structural components described in this invention; Figure 3 This is a first-view structural diagram of the assembly equipment described in this invention; Figure 4 This is a second-view structural diagram of the assembly equipment described in this invention; Figure 5 This is a third-view structural diagram of the assembly equipment described in this invention; Figure 6 This is a schematic diagram of the assembly channel forming method described in this invention; Figure 7 This is a structural diagram of the lower fixture described in this invention; Figure 8 This is a structural diagram of the stop element described in this invention; Among them: 1. Upper fixture, 11. Upper assembly slot, 12. Upper fixture limiting surface, 13. Rotary lifting module, 2. Lower fixture, 21. Lower assembly slot, 22. Lower fixture limiting surface, 23. Stop through slot, 24. Thin-walled structure, 3. Assembly actuator, 31. Drive element, 32. Stop element, 321. Stop end, 322. Support end, 323. Protrusion, 41. Feeding channel, 42. Feeding driver, 5. Guide block, 110. Structural component, 111. Protrusion, 112. Connecting through hole, 120. Spring, 130. Connecting rod, 200. Assembly channel. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0019] In this application, unless otherwise expressly 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 connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] The present invention will be further described in detail below with reference to specific embodiments: A headphone suspension is a hinge structure used at the connection between the headband and speaker unit of some headphone models, and it includes at least the following: Figure 1 and Figure 2 The structural component 110 and spring 120 are shown. One end of the first structural component is hinged to one end of the second structural component, and the other ends or middle of the first and second structural components are elastically connected by the spring 120. This allows the multiple structural components 110 to swing together by compressing the spring 120. Compared with using a spring sheet structure to clamp a pair of speaker units to the head, this suspension structure formed by the compression spring 120 provides better wearing comfort.

[0022] Specifically, such as Figure 1 As shown, a protrusion 111 is formed on the structural member 110, and a connecting through hole 112 is provided above the protrusion 111. A connecting rod 130 is installed through the connecting through hole 112 along the protruding direction of the protrusion 111, and in conjunction with... Figure 2 As shown, spring 120 is sleeved on connecting rod 130. The protruding direction is the direction in which the protrusion 111 has the longest dimensional parameter in the spatial coordinate system composed of the X-axis, Y-axis, and Z-axis.

[0023] like Figure 3 - Figure 5 As shown, this embodiment provides an assembly device for a structural component 110 and a spring 120 applied to an earphone suspension, including an assembly jig and an assembly actuator 3.

[0024] Combination Figure 6 and Figure 7 As shown, the assembly fixture comprises two parts: an upper fixture 1 and a lower fixture 2, which are capable of relative movement. The upper fixture 1 has an upper assembly groove 11 on its end face near the lower fixture 2, and the lower fixture 2 has a lower assembly groove 21 on its end face near the upper fixture 1. When the upper fixture 1 and lower fixture 2 are separated, the spring 120 to be assembled can be pre-placed into the lower assembly groove 21. When the upper fixture 1 and lower fixture 2 are in contact, the upper assembly groove 11 and lower assembly groove 21 combine to form a circumferentially closed assembly channel 200, allowing the spring 120 to move axially in a horizontal position within the assembly channel 200. This solves the problem of small springs flying off during assembly due to continuous driving force applied by the assembly actuator 3 while the spring's posture deflects, thus improving the assembly success rate.

[0025] like Figure 2 and 3 As shown, the assembly actuator 3 is connected to a drive element 31. The drive element 31 can abut against one end of the spring 120 in the assembly channel 200 and push the spring 120 forward along the assembly channel 200 under the drive of the assembly actuator 3. During the process of the drive element 31 pushing the spring 120 forward, the circumferentially closed assembly channel 200 will restrict the deformation of the spring 120 in the direction other than the axial direction.

[0026] The connecting rod 130, which is used to mount the spring 120, passes directly into the connecting through hole 112 above the protrusion 111 of the structural member 110. This is to prevent the driving element 31 from continuing to advance after the spring 120 is assembled onto the connecting rod 130, which could cause the connecting rod 130 to loosen and slide between itself and the connecting through hole 112. Figure 7 As shown, the lower fixture 2 has a stop groove 23 corresponding to the protrusion 111 and parallel to the assembly channel 200, which is combined with Figure 3 , Figure 4 and Figure 8 As shown, a stop element 32 is provided in conjunction with the drive element 31. Both the stop element 32 and the drive element 31 are driven by the assembly actuator 3 and move synchronously. When the drive element 31 enters the assembly channel 200, the stop element 32 simultaneously enters the stop groove 23 below the assembly channel 200. The drive element 31 and the stop element 32 move synchronously toward the structural member 110. When the stop end 321 on the stop element 32 passes through the stop groove 23 and abuts against the protrusion 111 of the structural member 110, the stop element 32 stops moving due to the abutment between the protrusion 111 and the stop element 32. Simultaneously, the drive element 31 also stops moving, thereby avoiding excessive force on the connecting rod 130.

[0027] Combination Figure 4 As shown, the process of the upper fixture 1 and the lower fixture 2 abutting, i.e., the formation of the assembly channel 200, is also equipped with a limit device. Furthermore, because the diameter of the assembled spring 120 is very small, there are high requirements for the precision of the upper assembly groove 11 and the lower assembly groove 21 during the formation of the assembly channel 200. Therefore, in the preferred embodiment of this application, the limit structure needs to be as close as possible to the upper assembly groove 11 and the lower assembly groove 21.

[0028] Specifically, a horizontal wall surface adjacent to the upper assembly groove 11 in the upper fixture 1 is constructed as an upper fixture limiting surface 12, and a horizontal wall surface adjacent to the lower assembly groove 21 in the lower fixture 2 is constructed as a lower fixture limiting surface 22. When the upper fixture limiting surface 12 and the lower fixture limiting surface 22 come into contact, the assembly channel 200 is formed.

[0029] When the upper fixture limiting surface 12 and the lower fixture limiting surface 22 come into contact, a large force is generated. For workpieces with thick walls, this force will not cause negative effects such as deformation. However, the following problems exist in this application: The structural component 110, applied to the hinge of the headphones, is relatively compact. Therefore, the minimum vertical distance between the protrusion 111 and the connecting rod 130 in the structural component 110 is very small. When the spring 120 is fitted onto the connecting rod 130, the minimum vertical distance between the protrusion 111 and the spring 120 will be even smaller. Furthermore, because the spring 120 and the connecting rod 130 are located in the upper lower mounting groove 21 during assembly, and the protrusion 111 is located in the lower stop channel, the distance between the lower fixture 2 and the lower mounting groove 21 and the stop channel 23 is also smaller than the minimum vertical distance between the protrusion 111 and the spring 120, thus forming a thin-walled structure 24. The impact force generated when the upper fixture limiting surface 12 and the lower fixture limiting surface 22 abut against each other may cause deformation in the thin-walled area.

[0030] To solve this problem, in this embodiment, the top surface of the stop element 32 perpendicular to the stop end 321 is constructed as a horizontal surface and set as a support end 322. The two sides of the support end 322 extend to the bottom of the thin-walled structure 24. When the lower fixture 2 abuts against the upper fixture 2, the support end 322 on the stop element 32 supports the thin-walled structure 24, thereby reducing the impact deformation of the thin-walled structure 24 caused by the pressure of the upper fixture 1.

[0031] In a preferred embodiment of this application, such as Figure 8 As shown, the driving element 31 is configured as a slender rod-shaped structure, and the stop element 32 is constructed as a plate-shaped structure. The stop end 321 is provided with a protrusion 323 that adapts to the arc-shaped outer edge of the protrusion 111. Furthermore, the driving elements 31 are arranged in a pair in parallel, and the stop element 32 is centrally located below the pair of driving elements 31. Correspondingly, the upper mounting groove 11 and the lower mounting groove 21 are configured as a pair corresponding to the driving elements 31, and the upper fixture limiting surface 12 and the lower fixture limiting surface 22 are respectively disposed between the pair of upper mounting grooves 11 and the pair of lower mounting grooves 21.

[0032] To reduce the sag of the slender drive element 31 and stop element 32 at their ends furthest from the assembly actuator 3 under gravity, in a preferred embodiment of this application, such as... Figure 3 As shown, a guide block 5 is fixed at one end of the lower fixture 2 near the assembly actuator 3. The guide block 5 has three through holes, two of which are round holes corresponding to the drive element 31 through which the drive element 31 passes, and the other is a square hole corresponding to and through the stop element 32. Furthermore, the size of the through holes corresponds to the drive element 31 and the stop element 32, so that the inner wall of the through holes can provide support for the ends of the drive element 31 and the stop element 32 away from the assembly actuator 3.

[0033] The stop element 32 not only limits the stroke of the drive element 31, but also maintains the structural stability of the lower fixture 2, thereby ensuring the dimensional accuracy and stability of the assembly channel 200 when the upper fixture 1 and the lower fixture 2 are closed.

[0034] Other aspects concern the feeding of structural component 110 and spring 120.

[0035] Among them, such as Figure 4 As shown, the loading operation of structural component 110 is achieved through loading channel 41. Specifically, loading channel 41 is configured as a chute, allowing structural component 110 to slide along the chute under external force. Loading channel 41 is connected to assembly channel 200. Structural component 110 is placed at the end of loading channel 41 away from assembly channel 200, and a loading actuator 42 is provided at this end. The loading actuator 42 includes a loading execution end extending into loading channel 41 and a loading cylinder that drives the execution end. The end of the loading execution end away from the loading cylinder is contoured to structural component 110, enabling it to push structural component 110 along loading channel 41 under the drive of the loading cylinder.

[0036] Furthermore, the connection point between the loading channel 41 and the assembly channel 200 is designated as the assembly station, where the assembly of the spring 120 and the structural component 110 will take place. The loading driver 42 drives one end of the structural component 110 to move along the loading channel 41 until the other end of the structural component 110 abuts against the end of the upper fixture 1, thereby fixing the structural component 110 on the assembly station through the loading driver 42 and the upper fixture 1.

[0037] The loading of spring 120 is achieved as follows: An upper fixture 1 is connected to a rotary lifting module 13, which drives the upper fixture 1 to separate from or abut against the lower fixture 2. In this embodiment, the rotary lifting module 13 is formed by combining a lifting module consisting of a motor and a lead screw mechanism with a rotary motor. After the rotary lifting module 13 drives the upper fixture 1 to rise, it can swing around a vertical axis, exposing the lower assembly slot 21. This allows the spring 120 to be directly flipped into the lower assembly slot 21 vertically by the corresponding spring 120 feeding device.

[0038] The work includes the following steps: Step 1: The rotating lifting module 13 drives the upper fixture 1 to rise and rotate sequentially, causing the upper assembly slot 11 to separate from the lower assembly slot 21 and exposing the lower assembly slot 21. At the same time, the structural component 110 is placed into the end of the loading channel 41 away from the lower assembly slot 21.

[0039] Step 2: Place the spring 120 into the lower assembly slot 21, then rotate the lifting module 13 to reset, forming the assembly channel 200; at the same time, drive the loading driver 42 to push the structural component 110 into the assembly station along the loading channel 41.

[0040] Step 3: Start the assembly actuator 3 so that the drive element 31 and the stop element 32 move along the assembly channel 200 and the stop through groove 23 respectively, pushing the spring 120 into the connecting rod 130 of the structural component 110 until the stop element 32 abuts against the protrusion 111.

[0041] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. An assembly device for a structural component (110) and a spring (120) for an earphone suspension, wherein a protrusion (111) is formed on the structural component (110), a connecting through hole (112) is provided above the protrusion (111), and a connecting rod (130) for the spring (120) is installed through the connecting through hole (112), characterized in that ； The assembly equipment includes: The assembly fixture includes an upper fixture (1) and a lower fixture (2) that are movable relative to each other. The upper fixture (1) and the lower fixture (2) are respectively provided with an upper assembly groove (11) and a lower assembly groove (21) at their adjacent ends. The upper fixture (1) moves toward the lower fixture (2) so that the upper assembly groove (11) and the lower assembly groove (21) are joined together to form an assembly channel (200) for the spring (120) to move axially. An assembly actuator (3) is connected to a drive element (31), which moves in the assembly channel (200) with a push spring (120); The lower fixture (2) has a stop groove (23) corresponding to the protrusion (111) and parallel to the assembly channel (200). A stop element (32) is provided in conjunction with the drive element (31). The stop element (32) and the drive element (31) are driven synchronously by the assembly actuator (3). The distance between the stop end (321) of the stop element (32) and the protrusion (111) corresponds to the remaining stroke of the drive element (31).

2. The assembly equipment for the structural component (110) and spring (120) applied to the headphone suspension according to claim 1, characterized in that, The walls adjacent to the upper assembly slot (11) and the lower assembly slot (21) are respectively constructed as an upper fixture limiting surface (12) and a lower fixture limiting surface (22), and the assembly channel (200) is formed in the contact state between the upper fixture limiting surface (12) and the lower fixture limiting surface (22). The lower fixture (2) has a thin-walled structure (24) formed between the lower assembly groove (21) and the stop through groove (23). The stop element (32) is constructed as a support end (322) perpendicular to the upper wall surface of the stop end (321). When the upper fixture limiting surface (12) impacts the lower fixture limiting surface (22), the support end (322) supports the thin-walled structure (24).

3. The assembly equipment for the structural component (110) and spring (120) applied to the headphone suspension according to claim 2, characterized in that, A loading channel (41) has a connecting assembly channel (200), and the structural member (110) is placed at one end of the loading channel (41) away from the assembly channel (200); The connection between the loading channel (41) and the assembly channel (200) is set as the assembly station; the loading driver (42) with the drive structure (110) moving along the loading channel (41) and the upper fixture (1) respectively abut against the two ends of the structure (110), so that the structure (110) is fixed at the assembly station.

4. The assembly equipment for the structural component (110) and spring (120) applied to the headphone suspension according to claim 3, characterized in that, The upper fixture (1) is connected to a rotary lifting module (13), which can drive the upper fixture (1) to perform lifting and lowering actions and swing around a vertical axis, so that a channel for spring (120) to be inserted vertically is formed above the lower assembly groove (21).

5. The assembly equipment for the structural component (110) and spring (120) applied to the headphone suspension according to claim 4, characterized in that, The drive element (31) is constructed as an elongated rod-shaped structure; The stop element (32) is constructed as a plate structure, and the stop end (321) is provided with a protrusion (323) that adapts to the arc-shaped outer edge of the protrusion (111).

6. The assembly equipment for the structural component (110) and spring (120) applied to the headphone suspension according to claim 5, characterized in that, The lower fixture (2) has a guide block (5) fixed at one end near the assembly actuator (3). The guide block (5) has a through hole for the drive element (31) and the stop element (32) to pass through. The inner wall of the through hole provides support for the end of the drive element (31) and the stop element (32) away from the assembly actuator (3).

7. The assembly equipment for the structural component (110) and spring (120) applied to the headphone suspension according to claim 6, characterized in that, The driving elements (31) are arranged in a pair in parallel, and the upper fixture limiting surface (12) and the lower fixture limiting surface (22) are respectively located between a pair of upper assembly slots (11) and a pair of lower assembly slots (21).

8. A method for assembling a structural component (110) and a spring (120) for use in an earphone suspension, employing the assembly equipment as described in claim 7, characterized in that, Includes the following steps: Step 1: The rotating lifting module (13) drives the upper fixture (1) to rise and rotate in sequence, so that the upper assembly slot (11) and the lower assembly slot (21) are separated and the lower assembly slot (21) is exposed; at the same time, the structural component (110) is placed in the feeding channel (41) at the end away from the lower assembly slot (21); Step 2: Place the spring (120) into the lower assembly slot (21), then rotate the lifting module (13) to reset, forming the assembly channel (200); at the same time, drive the loading driver (42) to push the structural component (110) into the assembly station along the loading channel (41); Step 3: Start the assembly actuator (3) so that the drive element (31) and the stop element (32) move along the assembly channel (200) and the stop through groove (23) respectively, pushing the spring (120) into the connecting rod (130) of the structural component (110) until the stop element (32) abuts against the protrusion (111).

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