Speaker magnetic circuit adhesion force detection apparatus

Abstract

The utility model discloses a loudspeaker magnetic circuit bonding force detection equipment relates to loudspeaker detection equipment technical field, including first detection device and second detection device, first detection device includes first sliding mechanism, elevating system, first pressure sensor and first contact fixture that connect gradually, still be equipped with first detection station on first detection device, first sliding mechanism is configured as drive elevating system and is close to or is far from first detection station along first direction, and elevating system is configured as drive first contact fixture and is close to or is far from first detection station along second direction, second detection device includes second sliding mechanism, second pressure sensor and second contact fixture that connect gradually, still be equipped with second detection station on second detection device, and second sliding mechanism is configured as drive second contact fixture and is close to or is far from second detection station along third direction, and the axial of loudspeaker semi -manufactured goods is perpendicular with first direction, third direction and is parallel with second direction.

Description

Technical Field

[0001] This utility model relates to the technical field of loudspeaker testing equipment, and in particular to a loudspeaker magnetic circuit adhesion testing equipment. Background Technology

[0002] Loudspeakers typically include a bracket, magnetic circuit assembly, diaphragm, and voice coil. In related technologies, during the loudspeaker manufacturing process, the bracket and magnetic circuit assembly are bonded together to form a semi-finished loudspeaker. The magnetic circuit assembly includes a U-shaped iron, a washer, and a magnet. However, occasionally, insufficient adhesion causes fatal defects such as the magnetic circuit assembly detaching, including the U-shaped iron falling off the bracket and the washer and magnet falling off the U-shaped iron. This problem cannot be effectively detected using existing process inspection methods. Therefore, there is an urgent need in this field for a testing device that can detect whether the bonding strength of the magnetic circuit assembly in a semi-finished loudspeaker meets design requirements. Utility Model Content

[0003] The main purpose of this invention is to provide a speaker magnetic circuit adhesion testing device, which aims to solve the problem that existing process testing methods cannot effectively detect insufficient adhesion of magnetic circuit components.

[0004] To achieve the above objectives, the speaker magnetic circuit adhesion testing device proposed in this utility model includes a first testing device and a second testing device. The first testing device includes a first sliding mechanism, a lifting mechanism, a first pressure sensor, and a first contact fixture connected in sequence. The first testing device is also provided with a first testing station. The first sliding mechanism is configured to drive the lifting mechanism to move closer to or away from the first testing station along a first direction, and the lifting mechanism is configured to drive the first contact fixture to move closer to or away from the first testing station along a second direction. The second testing device includes a second sliding mechanism, a second pressure sensor, and a second contact fixture connected in sequence. The second testing device is also provided with a second testing station. The second sliding mechanism is configured to drive the second contact fixture to move closer to or away from the second testing station along a third direction. When the speaker semi-finished product is placed at the first testing station, the axis of the speaker semi-finished product is perpendicular to the first direction and parallel to the second direction. When the speaker semi-finished product is placed at the second testing station, the axis of the speaker semi-finished product is perpendicular to the third direction. Attached Figure Description

[0005] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 the structures shown in these drawings without creative effort.

[0006] Figure 1 This invention provides a schematic diagram of the structure of an embodiment of the first detection device in a loudspeaker magnetic circuit adhesion testing equipment; Figure 2 for Figure 1 A schematic diagram showing the first contact head contacting the speaker semi-finished product; Figure 3 A schematic diagram of one embodiment of the loudspeaker magnetic circuit adhesion testing device is provided for this utility model; Figure 4 This invention provides a schematic diagram of an embodiment of the second detection device in a loudspeaker magnetic circuit adhesion testing equipment. Figure 5 for Figure 4 Exploded view of the second detection device in the middle; Figure 6 for Figure 4 Cross-sectional view of the second detection device.

[0007] Explanation of icon numbers: 1. First testing device; 1a. First testing station; 11. First sliding mechanism; 111. First sliding base; 112. First cylinder; 113. First sliding member; 113a. First guide part; 114. Second guide part; 115. Hydraulic stop; 116. Soft rubber block; 12. First pressure sensor; 13. Lifting mechanism; 131. Lifting bracket; 132. Second cylinder; 133. Second sliding member; 133a. Third guide part; 134. Fourth guide part; 14. First contact fixture; 141. First mounting base; 142. First contact head; 1421. Step portion; 2. Second testing device; 2a. Second testing station; 21. Second sliding mechanism; 211. Second sliding base; 212. Drive device; 213. Lead screw; 214. Third sliding component; 22. Second pressure sensor; 23. Second contact fixture; 231. Second contact head; 231a. Through groove; 232. Second mounting base; 3. Speaker semi-finished products.

[0008] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0009] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0010] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0011] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0012] This invention proposes a device for testing the adhesion force of a loudspeaker magnetic circuit.

[0013] Please see Figure 1 , Figure 3 , Figure 4 and Figure 6, in an embodiment of the present utility model, the speaker magnetic circuit adhesion force detection apparatus comprises a first detection device 1 and a second detection device 2. The first detection device 1 includes a first sliding mechanism 11, a first pressure sensor 12, a lifting mechanism 13 and a first contact fixture 14 connected in sequence. The first detection device 1 is further provided with a first detection station 1a. The first sliding mechanism 11 is configured to drive the lifting mechanism 13 to move toward or away from the first detection station 1a along a first direction. The lifting mechanism 13 is configured to drive the first contact fixture 14 to move toward or away from the first detection station 1a along a second direction. The second detection device 2 includes a second sliding mechanism 21, a second pressure sensor 22 and a second contact fixture 23 connected in sequence. The second detection device 2 is further provided with a second detection station 2a. The second sliding mechanism 21 is configured to drive the second contact fixture 23 to move toward or away from the second detection station 2a along a third direction. When the speaker semi-finished product 3 is placed on the first detection station 1a, the axial direction of the speaker semi-finished product 3 is perpendicular to the first direction and parallel to the second direction. When the speaker semi-finished product 3 is placed on the second detection station 2a, the axial direction of the speaker semi-finished product 3 is perpendicular to the third direction.

[0014] In this embodiment, the speaker magnetic circuit adhesion force detection apparatus can perform a non-destructive push test on each bonding surface between the magnetic circuit assembly and the support at the stage of the speaker semi-finished product 3. It should be noted that the speaker semi-finished product 3 includes a support, a U-shaped iron, a magnetic steel and a washer. The U-shaped iron is disposed on one side of the support. The magnetic steel and the washer are coaxially disposed in the U-shaped iron and are fixed by bonding, and the bonding surfaces are parallel to each other. The axial direction of the speaker semi-finished product 3 is perpendicular to each bonding surface of the U-shaped iron, the magnetic steel and the washer. The speaker semi-finished product 3 can be placed upright on the first detection station 1a so that the magnetic steel and the washer are placed upward, and can be placed upside down on the second detection station 2a so that the U-shaped iron is placed upward, which facilitates the contact of the contact fixture and observation. During detection, the first contact fixture 14 of the first detection device 1 extends into the support and the U-shaped iron, abuts against the washer or the magnetic steel, and applies a force perpendicular to the axial direction of the speaker semi-finished product 3 to the washer or the magnetic steel. The first pressure sensor 12 is configured to detect the abutting force of the first contact fixture 14 and the washer or the magnetic steel along the first direction, so as to reflect the adhesion force between the washer and the magnetic steel, and between the magnetic steel and the U-shaped iron. The second contact head 231 of the second detection device 2 abuts against the outer wall of the U-shaped iron, and applies a force perpendicular to the axial direction of the speaker semi-finished product 3 to the U-shaped iron. The second pressure sensor 22 is configured to detect the abutting force of the second contact fixture 23 and the U-shaped iron along the third direction, so as to reflect the adhesion force between the U-shaped iron and the support. When the detected adhesion force reaches a preset value without separation, the product is qualified. In this way, it is possible to detect whether the bonding strength of the magnetic circuit assembly in the speaker semi-finished product 3 meets the design requirements, and solve the problem that the existing process detection means cannot effectively detect the insufficient adhesion force of the magnetic circuit assembly.

[0015] Specifically, the first sliding mechanism 11, the second sliding mechanism 21, and the lifting mechanism 13 can all be a combination of a servo motor and a ball screw, or a linear motor, cylinder, etc., and this embodiment does not limit the specific choice. Taking the first sliding mechanism 11 as an example, the first sliding mechanism 11 can be a combination of a servo motor and a ball screw. The screw nut is rigidly connected to the back plate of the lifting mechanism 13. When the servo motor rotates, the nut drives the lifting mechanism 13 to reciprocate along the first direction to move closer to or further away from the first detection station 1a. In addition to the motor and screw combination scheme, the first sliding mechanism 11 can also use a linear motor. As long as it can output controllable linear motion in the first direction, it can achieve the same technical effect. The lifting mechanism 13 and the second sliding mechanism 21 are similar and will not be described in detail here. The first sliding mechanism 11 drives the lifting mechanism 13 to move closer to or further away from the first inspection station 1a along the first direction. The lifting mechanism 13 is configured to drive the first contact fixture 14 to move closer to or further away from the first inspection station 1a along the second direction. In a spatial rectangular coordinate system, when the speaker semi-finished product 3 is placed at the first inspection station 1a and the second inspection station 2a, the axial direction of the speaker semi-finished product 3 coincides with or is parallel to the Z-axis. The first direction can be set along the X-axis or Y-axis, and the second direction can be set along the Z-axis. In this way, the first sliding mechanism 11 drives the lifting mechanism 13 and the first contact fixture 14 to reciprocate along the X-axis or Y-axis, and the lifting mechanism 13 drives the first contact fixture 14 to reciprocate along the Z-axis. This can adapt to the shape of various brackets so that the first contact fixture 14 can be inserted into the bracket and a radial thrust can be applied to the magnet or washer. Similarly, the third direction can be set along the X-axis or Y-axis. In this way, the second sliding mechanism 21 drives the second contact fixture 23 to reciprocate along the X-axis or Y-axis to move closer to or away from the second workstation and apply a radial thrust to the U-shaped iron. The first pressure sensor 12 and the second pressure sensor 22 can be commercially available cylindrical tension / compression sensors, or other common pressure sensors. This embodiment does not limit the choice.

[0016] The loudspeaker magnetic circuit adhesion testing equipment may include a mounting base to support the first testing device 1 and the second testing device 2, or the first testing device 1 and the second testing device 2 may be directly installed on an indoor floor. It may also be further equipped with a transfer mechanism such as a robotic arm to move the speaker semi-finished product 3 between the first testing station 1a and the second testing station 2a. The first testing station 1a and the second testing station 2a are groove-shaped spaces adapted to the outer contour shape of the speaker semi-finished product 3, such as... Figure 4 and Figure 5 As shown, it should be noted that the first inspection station 1a and the second inspection station 2a can be directly opened on the installation base, or a platform with the groove-shaped space can be added to the installation base or indoor floor.

[0017] Further, please refer to Figure 1 and Figure 2In one embodiment of the present invention, the first sliding mechanism 11 includes a first sliding base 111, a first cylinder 112, and a first sliding member 113. The first cylinder 112 is fixedly disposed on the first sliding base 111, and the first sliding member 113 is fixedly connected to the lifting mechanism 13. The piston rod of the first cylinder 112, the first pressure sensor 12, and the lifting mechanism 13 are connected in sequence. The first sliding member 113 is provided with a first guide portion 113a, and the first sliding base 111 is provided with a second guide portion 114. The first guide portion 113a and the second guide portion 114 are slidably engaged, and both the first guide portion 113a and the second guide portion 114 extend along a first direction.

[0018] In this embodiment, to simplify the structure, reduce costs, and improve reliability under frequent start-stop conditions, the first sliding mechanism 11 is driven by a cylinder. Specifically, the first sliding mechanism 11 includes a first sliding base 111, a first cylinder 112, and a first sliding member 113. A mounting plate protrudes from the top surface of the first sliding base 111. The outer shell of the first cylinder 112 is fixedly mounted on the mounting plate, and the piston rod of the first cylinder 112 extends through the mounting plate to the other side of the mounting plate. The first sliding member 113 is arranged in a rectangular block shape and is fixedly connected to the bottom of the lifting mechanism 13. The piston rod of the first cylinder 112, the first pressure sensor 12, and the side wall of the lifting mechanism 13 are sequentially connected and distributed along a first direction, so that the pressure among the three is transmitted along the first direction. A first guide portion 113a is provided on the first sliding member 113, and a second guide portion 114 is provided on the first sliding base 111. The first guide portion 113a and the second guide portion 114 slide in cooperation, and both the first guide portion 113a and the second guide portion 114 extend along the first direction.

[0019] The first guide part 113a can be a slide rod. The two ends of the slide rod are connected to the first sliding base 111 through support members and are spaced apart from the first sliding base 111. The second guide part 114 is a slide sleeve that is slidably sleeved on the slide rod. The slide sleeve is connected to the first sliding member 113 through fasteners such as bolts. In this way, the slide sleeve slides along the slide rod to guide the first sliding member 113 to slide in the first direction, so that the first contact fixture 14 always maintains a straight trajectory when pushing the washer or magnet, and ensures that the pressure sensor reading truly reflects the bonding strength.

[0020] Further, please refer to Figure 1 and Figure 2 In one embodiment of the present invention, one of the first guide portion 113a and the second guide portion 114 is a guide groove, and the other is a guide rail.

[0021] In this embodiment, the inner contour of the guide groove matches the outer contour of the guide rail, and the guide rail can be embedded in the guide groove. The two can slide relative to each other in a straight line. The guide groove can be placed on the first sliding member 113 and the guide rail can be placed on the first sliding base 111, or the guide groove can be placed on the first sliding base 111 and the guide rail can be placed on the first sliding member 113, both of which can achieve the function of sliding guidance. For example, the guide groove can be directly formed on the bottom surface of the first sliding member 113, and the guide rail can be embedded in or connected to the top surface of the first sliding base 111 by fasteners such as bolts. Both extend along the first direction. In order to prevent the first sliding member 113 from being disturbed and derailing, a straight rib parallel to the first direction can be further provided on the side wall of the guide groove, and a straight groove parallel to the first direction can be provided on the side wall of the guide rail. The straight rib and the inner wall of the straight groove are tightly slidably connected. In this way, the guide rail and the inner wall of the guide groove are interlocked so that the first sliding member 113 can only slide along the first direction and will not disengage from the guide groove in other directions.

[0022] Further, please refer to Figure 1 and Figure 2 In one embodiment of the present invention, the first sliding base 111 is provided with two elastic stops, which are respectively disposed on both sides of the second guide portion 114 so that the first sliding member 113 is slidably limited between the two elastic stops.

[0023] In this embodiment, two elastic stops are added to the first sliding base 111, respectively located near the two ends of the second guide portion 114, so that the first sliding member 113 is always restricted to reciprocating between the two. The stops can be soft rubber blocks 116, which are cylindrical and made of polyurethane. A stainless steel screw is inserted into the center of the soft rubber block 116, and the screw root is threaded into the threaded hole on the end face of the first sliding base 111. The height of the head boss is slightly lower than the top end face of the soft rubber block 116, ensuring that the first sliding member 113 contacts the soft rubber block 116 first and is then stopped, thereby avoiding direct impact that could cause structural damage. The elastic stops can also be hydraulic stops 115, which are alloy steel shells fixed to the first sliding base 111 by a mounting plate. The piston rod of the hydraulic stops 115 extends toward the first sliding member 113, and a nylon impact cap is fitted to the end of the rod. Before the first sliding member 113 reaches its endpoint, the impact cap first contacts the side of the first sliding member 113, the piston rod is pressed in, and the silicone oil in the housing generates a velocity-related damping force through the throttling gap. The kinetic energy is smoothly converted into heat energy and slowly released during reset, achieving a flexible stop with almost no rebound. In this way, by setting two elastic stop members, the cylinder-driven first sliding mechanism 11 increases the safety and quiet elastic limit, reduces cylinder damage, and improves the cylinder's service life.

[0024] Further, please refer to Figure 1 and Figure 2In one embodiment of this utility model, the lifting mechanism 13 includes a lifting bracket 131, a second cylinder 132, and a second sliding member 133. The lifting bracket 131 is fixedly connected to the first sliding mechanism 11, the second cylinder 132 is fixedly disposed on the lifting bracket 131, and the second sliding member 133 is fixedly connected to the first contact fixture 14. The piston rod of the second cylinder 132 is connected to the first contact fixture 14. The second sliding member 133 is provided with a third guide portion 133a, and the lifting bracket 131 is provided with a fourth guide portion 134. The third guide portion 133a and the fourth guide portion 134 slide in cooperation, and both the third guide portion 133a and the fourth guide portion 134 extend along the second direction.

[0025] In this embodiment, the lifting bracket 131 includes a horizontally arranged base plate connected to the first sliding member 113, and a support column with an I-shaped cross-section vertically arranged on the base plate. The first pressure sensor 12 and the first contact fixture 14 are respectively located on both sides of the support column. The housing of the second cylinder 132 is fixed to the top of the support column, and the piston rod of the second cylinder 132 is fixedly connected to the top of the first contact fixture 14. The side wall of the first contact fixture 14 facing the support column is fixedly connected to the second sliding member 133. The second sliding member 133 is provided with a third guide portion 133a, and the lifting bracket 131 is provided with a fourth guide portion 134. The third guide portion 133a and the fourth guide portion 134 are slidably engaged, and both the third guide portion 133a and the fourth guide portion 134 extend along a second direction. The third guide portion 133a and the fourth guide portion 134 can be a sliding sleeve and a sliding rod, respectively. The arrangement of the first guide portion 113a and the second guide portion 114 in the above embodiment can be referred to, and will not be repeated here. In this way, the first contact fixture 14 maintains a straight trajectory as it extends into the bracket and approaches the washer or magnet, so as to make precise contact with the washer or magnet.

[0026] Further, please refer to Figure 1 and Figure 2 In one embodiment of the present invention, one of the third guide portion 133a and the fourth guide portion 134 is a guide groove, and the other is a guide rail.

[0027] In this embodiment, the inner contour of the guide groove matches the outer contour of the guide rail, and the guide rail can be embedded in the guide groove. The two can slide relative to each other in a straight line. The guide groove can be placed on the second sliding member 133 and the guide rail can be placed on the support column, or the guide groove can be placed on the support column and the guide rail can be placed on the second sliding member 133, both of which can achieve the function of sliding guidance. For example, the guide groove can be directly formed on the side of the second sliding member 133, and the guide rail is embedded in or connected to the side wall of the support column by fasteners such as bolts. Both extend along the second direction. In order to prevent the second sliding member 133 from being disturbed and derailing, a straight rib parallel to the second direction can be further provided on the side wall of the guide groove, and a straight groove parallel to the second direction can be provided on the side wall of the guide rail. The straight rib and the inner wall of the straight groove are tightly slidably connected. In this way, the guide rail and the inner wall of the guide groove are interlocked, so that the second sliding member 133 can only slide along the second direction and will not disengage from the guide groove in other directions.

[0028] Further, please refer to Figure 1 and Figure 2 In one embodiment of the present invention, the first contact fixture 14 includes a first mounting base 141 and a first contact head 142 that are detachably connected to each other; the first mounting base 141 is connected to the piston rod of the second cylinder 132, and the first contact head 142 is provided with a stepped portion 1421 for abutting against the magnetic circuit assembly.

[0029] In this embodiment, the first mounting base 141 is a rectangular aluminum alloy block with a threaded hole at the center of its top surface, which engages with the floating joint at the piston rod end of the second cylinder 132. Its sidewalls are connected to the second sliding member 133 via bolts. The side of the first mounting base 141 facing away from the second sliding member 133 is connected to the first contact head 142 via bolts. The first contact head 142 is a square columnar structure extending along the second direction. Its bottom end is milled with one or more steps 1421 according to the outer diameter of the washer or magnet. The step surface is perpendicular to the speaker axis. The sidewalls of each step are arc-shaped, and their dimensions correspond one-to-one with the outer diameter specifications of common magnets or washers, thus adapting to various magnets and washers. If a single first contact head 142 cannot meet the usage requirements, a suitable first contact head 142 can be replaced simply by loosening the set screw.

[0030] Further, please refer to Figures 4 to 6 In one embodiment of the present invention, the second sliding mechanism 21 includes a second sliding base 211, a driving device 212, a lead screw 213, and a third sliding member 214; the driving device 212 is fixedly disposed on the second sliding base 211, the lead screw 213 is rotatably disposed on the second sliding base 211, the driving device 212 is connected to the lead screw 213 in a transmission connection, and the third sliding member 214 is sleeved on the lead screw 213 and screwed to the lead screw 213; the third sliding member 214, the second pressure sensor 22, and the second contact fixture 23 are connected in sequence.

[0031] In this embodiment, the second sliding mechanism 21 serves as the power source for the second detection device 2. Its function is to output a smooth, reversible, and position-controllable linear displacement in the horizontal plane, allowing the second contact fixture 23 to slowly approach or move away from the speaker semi-finished product 3 that is inverted at the second detection station 2a, thereby applying radial pushing force to the outer wall of the U-shaped iron. Specifically, the second sliding base 211 is a rectangular platform milled from a single piece of metal. The bottom surface can be directly locked to the equipment base, and the top surface has two spaced mounting plates that are distributed along a third direction. Each mounting plate is inlaid with a bearing, and the optical shaft sections at both ends of the lead screw 213 are respectively inserted into the bearings to reduce friction during rotation. The drive device 212 uses a servo motor, which can be coaxially connected to the lead screw 213 via an adapter sleeve or coupling. Alternatively, the servo motor can be set parallel to the lead screw 213 and connected to the lead screw 213 via a gear set. The third sliding member 214 has a through hole extending along a third direction. The inner wall of the through hole has an external thread and is screwed to the lead screw 213. The second pressure sensor 22 is located between the third sliding member 214 and the second contact fixture 23. Its force direction coincides with the axis of the lead screw 213, ensuring that the pushing force is transmitted to the outer wall of the U-shaped iron without additional bending moment. When the drive device 212 rotates at a preset speed, the lead screw 213 rotates synchronously, and the third sliding member 214 translates along the axial direction of the lead screw 213. The third sliding member 214, the second pressure sensor 22, and the second contact fixture 23 move as a whole. By controlling the forward and reverse rotation and the number of rotations of the drive device 212, the pushing distance of the second contact fixture 23 can be precisely adjusted.

[0032] Further, please refer to Figures 4 to 6 In one embodiment of the present invention, the second contact fixture 23 includes a second mounting base 232 and a second contact head 231 that are detachably connected to each other. The second mounting base 232 is connected to the second pressure sensor 22. The second contact head 231 is provided with a through groove 231a. The inner wall of the through groove 231a is used to abut against the magnetic circuit assembly. The through groove 231a is gradually narrowed from the opening to the bottom of the through groove 231a.

[0033] In this embodiment, the second contact fixture 23 is the final actuator that applies the pushing force to the outer wall of the U-shaped iron. It must ensure that the pushing axis coincides with the second pressure sensor 22 and adapt to U-shaped irons of various outer diameters to avoid downtime losses caused by replacing the entire fixture. Therefore, this embodiment splits the second contact fixture 23 into a second mounting base 232 and a second contact head 231. The second mounting base 232 is a rectangular aluminum alloy block with a transverse fixing groove machined on one side. The second contact head 231 is snapped into the fixing groove and connected to the second mounting base 232 by bolts. This allows for the replacement of different second contact heads 231 to adapt to different magnetic circuit components. The second contact head 231 is provided with a universal groove 231a, which gradually narrows from its opening to its bottom, for example, in a V-shape or trapezoidal shape. This not only adapts to various types of magnetic circuit components but also allows the magnetic circuit components to automatically center themselves, avoiding eccentric force.

[0034] Furthermore, in one embodiment of this utility model, the speaker magnetic circuit adhesion force detection device also includes a main control module, and the first sliding mechanism 11, the lifting mechanism 13, the first pressure sensor 12, the second sliding mechanism 21, and the second pressure sensor 22 are all communicatively connected to the main control module.

[0035] In this embodiment, the main control module receives signals from the first pressure sensor 12 and the second sensor, and controls the movement of the first sliding mechanism 11, the lifting mechanism 13, and the second sliding mechanism 21. Taking the first sliding mechanism 11 as an example, initially, the main control module controls the first sliding mechanism 11 to move towards the first workstation and apply pressure to the magnetic circuit assembly. The first pressure sensor 12 outputs a signal to the main control module in real time. When the first pressure sensor 12 detects that the pressure applied to the magnetic circuit assembly is greater than the preset adhesive force, it indicates that the adhesive force meets the requirements. At this time, the main control module controls the first sliding mechanism 11 to return. The second sliding mechanism 21 works similarly, so it will not be described in detail. The main control module can be a microcontroller board, a programmable logic controller, a host server, etc. These types of main control module products are all existing mature technologies, and will not be described in detail here.

[0036] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A device for testing the adhesion force of a loudspeaker magnetic circuit, characterized in that, The loudspeaker magnetic circuit adhesion testing equipment includes: A first detection device, comprising a first sliding mechanism, a first pressure sensor, a lifting mechanism, and a first contact fixture connected in sequence, and further comprising a first detection station, wherein the first sliding mechanism is configured to drive the lifting mechanism to move closer to or away from the first detection station along a first direction, and the lifting mechanism is configured to drive the first contact fixture to move closer to or away from the first detection station along a second direction; and The second detection device includes a second sliding mechanism, a second pressure sensor, and a second contact fixture connected in sequence. The second detection device is also provided with a second detection station. The second sliding mechanism is configured to drive the second contact fixture to move closer to or away from the second detection station in a third direction. Specifically, when the speaker semi-finished product is placed at the first testing station, the axis of the speaker semi-finished product is perpendicular to the first direction and parallel to the second direction; when the speaker semi-finished product is placed at the second testing station, the axis of the speaker semi-finished product is perpendicular to the third direction.

2. The loudspeaker magnetic circuit adhesion testing device as described in claim 1, characterized in that, The first sliding mechanism includes a first sliding base, a first cylinder, and a first sliding member. The first cylinder is fixedly mounted on the first sliding base, and the first sliding member is fixedly connected to the lifting mechanism. The piston rod of the first cylinder, the first pressure sensor, and the lifting mechanism are connected in sequence. The first sliding member is provided with a first guide portion, and the first sliding base is provided with a second guide portion. The first guide portion and the second guide portion slide in cooperation, and both the first guide portion and the second guide portion extend along the first direction.

3. The loudspeaker magnetic circuit adhesion testing device as described in claim 2, characterized in that, Of the first guide portion and the second guide portion, one is a guide groove and the other is a guide rail.

4. The loudspeaker magnetic circuit adhesion testing device as described in claim 2, characterized in that, The first sliding base is provided with two elastic stops, which are respectively located on both sides of the second guide portion so that the first sliding member is slidably limited between the two elastic stops.

5. The loudspeaker magnetic circuit adhesion testing device as described in claim 1, characterized in that, The lifting mechanism includes a lifting bracket, a second cylinder, and a second sliding member. The lifting bracket is fixedly connected to the first sliding mechanism, the second cylinder is fixedly mounted on the lifting bracket, the second sliding member is fixedly connected to the first contact fixture, and the piston rod of the second cylinder is connected to the first contact fixture. The second sliding member is provided with a third guide portion, and the lifting bracket is provided with a fourth guide portion. The third guide portion and the fourth guide portion slide in cooperation, and both the third guide portion and the fourth guide portion extend along the second direction.

6. The loudspeaker magnetic circuit adhesion testing device as described in claim 5, characterized in that, Of the third guide portion and the fourth guide portion, one is a guide groove and the other is a guide rail.

7. The loudspeaker magnetic circuit adhesion testing device as described in claim 5, characterized in that, The first contact fixture includes a first mounting base and a first contact head that are detachably connected to each other; The first mounting base is connected to the piston rod of the second cylinder, and the first contact head is provided with a stepped portion for abutting against the magnetic circuit assembly.

8. The loudspeaker magnetic circuit adhesion testing device as described in any one of claims 1 to 7, characterized in that, The second sliding mechanism includes a second sliding base, a driving device, a lead screw, and a third sliding member; The driving device is fixedly mounted on the second sliding base, the lead screw is rotatably mounted on the second sliding base, the driving device is connected to the lead screw in a transmission connection, and the third sliding member is sleeved on the lead screw and screwed to the lead screw; The third sliding member, the second pressure sensor, and the second contact fixture are connected in sequence.

9. The loudspeaker magnetic circuit adhesion testing device as described in any one of claims 1 to 7, characterized in that, The second contact fixture includes a second mounting base and a second contact head that are detachably connected to each other, and the second mounting base is connected to the second pressure sensor; The second contact head is provided with a universal groove, the inner wall of which is used to abut against the magnetic circuit assembly, and the universal groove gradually narrows from the opening to the bottom of the universal groove.

10. The loudspeaker magnetic circuit adhesion testing device as described in any one of claims 1 to 7, characterized in that, The speaker magnetic circuit adhesion force detection device also includes a main control module, and the first sliding mechanism, the lifting mechanism, the first pressure sensor, the second sliding mechanism, and the second pressure sensor are all communicatively connected to the main control module.

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