An ultra-thin sound cavity welding device and method for a loudspeaker

Abstract

The present invention relates to the technical field of welding, and particularly to a welding device and method for a super-thin sound cavity of a loudspeaker. The device includes: a workbench, which is independently and fixedly arranged; a plurality of clamping blocks, all arranged on the workbench and attached to the side surface of the sound cavity housing; a plurality of welding heads, all arranged above the workbench and moving closer to and away from the workbench; a feeding push block, which slides along the length direction of the sound cavity housing on the workbench; a pressing block, which slides vertically on the feeding push block; two support modules, symmetrically arranged on both sides of the sound cavity housing; each support module includes: a slider, which slides along the length direction of the sound cavity housing; a first sliding rod, which slides vertically on the slider; a second sliding rod, which slides vertically on the slider and has a chute arranged at the bottom end; a rotating block, which is hinged to the bottom of the first sliding rod and is provided with a sliding column extending into the chute; a runner is also arranged on the rotating block. The present invention can effectively solve the problem of low welding quality of the existing welding equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly to a welding device and method for an ultra-thin sound cavity of a loudspeaker. Background Art

[0002] With the demand for thinner and lighter electronic devices, the built-in loudspeakers also need to develop in the direction of light weight. Among them, the sound cavity of the loudspeaker also needs to be smaller and thinner in design. The sound cavity usually consists of two parts, a housing and a cover plate. During production, the housing and the cover plate need to be welded together to form a cavity. As the side wall of the housing becomes thinner, the welding head is more likely to cause deformation of the housing when pressing down. As shown in Figure 1 When the side wall of the housing deforms outward (as shown on the right side in the figure), at this time, support can be formed through an external positioning component. However, when the side wall of the housing deforms inward (as shown on the left side in the figure), then the external positioning component cannot play a supporting role at this time. Then, with the deformation of the side wall, it will lead to problems such as insufficient pressing force at this place by the welding head to form a virtual weld, or misalignment of the welding position, seriously affecting the welding quality. Summary of the Invention

[0003] The present invention provides a welding device and method for an ultra-thin sound cavity of a loudspeaker, which can effectively solve the problem of low welding quality of the existing welding device in the background art.

[0004] A welding device for an ultra-thin sound cavity of a loudspeaker provided by the present invention includes:

[0005] A workbench, independently and fixedly arranged;

[0006] A plurality of clamping blocks, all arranged on the workbench and fitting with the side surface of the sound cavity housing;

[0007] A plurality of welding heads, all arranged above the workbench and moving close to and away from the workbench;

[0008] A feeding push block, sliding along the length direction of the sound cavity housing on the workbench;

[0009] A pressing block, vertically sliding on the feeding push block;

[0010] Two support modules, symmetrically arranged on both sides of the sound cavity housing; each support module includes:

[0011] A slider, sliding along the length direction of the sound cavity housing;

[0012] A first sliding rod, vertically sliding on the slider;

[0013] A second sliding rod, vertically sliding on the slider and provided with a chute at the bottom end;

[0014] The rotating block is hinged to the bottom of the first sliding rod and is provided with a sliding column extending into the sliding groove; a rotating wheel is also arranged on the rotating block.

[0015] Furthermore, the support module further includes:

[0016] The guiding plate is arranged above the workbench and is relatively fixed to the workbench; a first guiding groove and a second guiding groove are arranged on the guiding plate; one end of the first guiding groove away from the feeding pushing block is inclined upward, and one end of the second guiding groove away from the feeding pushing block is inclined upward;

[0017] A first guiding post is fixedly arranged on the first sliding rod, and the first guiding post extends into the first guiding groove;

[0018] A second guiding post is fixedly arranged on the second sliding rod, and the second guiding post extends into the second guiding groove.

[0019] Furthermore, guiding rollers are arranged on both the first guiding post and the second guiding post.

[0020] Furthermore, the length of the inclined part of the first guiding groove is less than the length of the inclined part of the second guiding groove.

[0021] Furthermore, the inclined part of the first guiding groove is parallel to the inclined part of the second guiding groove.

[0022] Furthermore, one end of the first guiding groove or the second guiding groove close to the feeding pushing block communicates with the side wall of the guiding plate; a supporting roller aligned with the first guiding groove or the second guiding groove is arranged on the feeding pushing block.

[0023] Furthermore, the support module further includes:

[0024] The third sliding rod slides vertically on the slider and is fixedly connected to the first sliding rod;

[0025] The fourth sliding rod slides vertically on the slider and is fixedly connected to the second sliding rod.

[0026] Furthermore, a plurality of pneumatic push rods are arranged on the feeding pushing block, and the pressing block is driven by the pneumatic push rods.

[0027] Furthermore, a rubber bottom plate is arranged at the bottom of the pressing block.

[0028] The present invention also provides a welding method for a super-thin sound cavity of a loudspeaker, which is used for the above-mentioned welding equipment for the super-thin sound cavity of the loudspeaker, and includes:

[0029] S10: Both the first sliding rod and the second sliding rod rise, so that the rotating wheel moves up to the highest position; the pressing block and the welding head both move up to the highest position;

[0030] S20: Place the sound cavity housing on the workbench, press against the side wall of the sound cavity housing with the clamping block, then lower the first sliding rod and the second sliding rod so that the rotating wheel presses against the inside of the side wall of the sound cavity housing in the length direction, and the slider moves to the position closest to the feeding pusher block; place the sound cavity cover on the workbench, and then lower the pressing block to press against the sound cavity cover.

[0031] S30: The feeding pusher block moves towards the sound cavity housing to send the sound cavity cover towards the sound cavity housing; the slider moves synchronously with the feeding pusher block. When the rotating wheel is about to reach the side of the sound cavity housing, the first sliding rod and the second sliding rod rise to move the rotating wheel up to the highest position.

[0032] S40: After the sound cavity cover covers the sound cavity housing, keep the position of the feeding pusher block unchanged, and the welding head located in the length direction of the sound cavity housing descends for welding.

[0033] S50: After welding, the welding head and the feeding pusher block return to their original positions, and then the welding head located in the width direction of the sound cavity housing descends for welding, and the welding of the sound cavity can be completed.

[0034] Through the technical solution of the present invention, the following technical effects can be achieved:

[0035] When the feeding pusher block pushes the sound cavity cover to contact the sound cavity housing, this welding equipment presses against the inside of the side wall of the sound cavity housing through the rotating wheel, applying an outward pressing force from the inside to the side wall of the housing. When the side wall of the housing deforms, it will only deform outward, and the rotating wheel will also move as the sound cavity cover moves, thereby pushing the side wall of the entire length direction of the sound cavity housing outward, so as to ensure the welding quality of the entire length direction of the sound cavity housing. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a deformation schematic diagram of the sound cavity in the prior art;

[0038] Figure 2 It is a structural schematic diagram of the ultra-thin sound cavity welding equipment for speakers in the present invention;

[0039] Figure 3 It is a structural schematic diagram of the ultra-thin sound cavity welding equipment for speakers in the present invention after hiding the workbench and the welding head;

[0040] Figure 4 It is a structural schematic diagram of the support module in the present invention;

[0041] Figure 5 Schematic diagram of the first state when the support module in the present invention operates;

[0042] Figure 6 Schematic diagram of the second state when the support module in the present invention operates;

[0043] Figure 7 Schematic diagram of the third state when the support module in the present invention operates;

[0044] Figure 8 Schematic diagram of the structure of the guide plate in the present invention;

[0045] Figure 9 Schematic diagram of the second structure of the rotating block in the present invention;

[0046] Figure 10 Schematic diagram of the third structure of the rotating block in the present invention.

[0047] Reference numerals: 1, workbench; 2, clamping block; 3, welding head; 4, loading push block; 41, support roller; 42, pneumatic push rod; 5, pressing block; 6, support module; 61, slider; 62, first sliding rod; 62a, first guiding column; 63, second sliding rod; 63a, second guiding column; 64, rotating block; 65, runner; 66, guide plate; 66a, first guiding groove; 66b, second guiding groove; 67, third sliding rod; 68, fourth sliding rod. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0049] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0050] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] The present invention relates to a welding device for an ultra-thin sound cavity of a speaker, as Figures 2 to 4 shown. Its main components include a workbench 1, a clamping block 2, a welding head 3, a feeding push block 4, a pressing block 5, and a support module 6. The specific structures of each component are as follows:

[0052] The workbench 1 is independently and fixedly arranged, usually fixedly installed on the ground or a frame; multiple areas are defined on the workbench 1, including a housing placement area and a cover placement area that are in contact with each other. The cover placement area is higher than the housing placement area, so that the sound cavity cover can be moved onto the sound cavity housing by horizontal movement.

[0053] Multiple clamping blocks 2 are all arranged on the workbench 1 and are used to fit against the side of the sound cavity housing, so that the sound cavity housing can be fixed on the workbench 1 and provide support for the side wall of the sound cavity housing during welding. Among the multiple clamping blocks 2, one clamping block 2 for abutting against the length side wall of the sound cavity housing and one clamping block 2 for abutting against the length side wall of the sound cavity housing are arranged in a slidable structure on the workbench 1 to facilitate the placement of the sound cavity housing; the remaining one clamping block 2 is fixed on the workbench 1 to form a right-angle structure with the cover placement area, facilitating the positioning of the sound cavity housing.

[0054] Multiple welding heads 3 include two welding heads 3 for welding in the length direction of the sound cavity and two welding heads 3 for welding in the width direction of the sound cavity. Each welding head 3 is arranged above the workbench 1 and moves closer to and away from the workbench 1. The movement trajectories of each welding head 3 are all inclined, so as to leave more space for the installation of the remaining components above.

[0055] The feeding push block 4 slides on the workbench 1 along the length direction of the sound cavity housing under the drive of a power device and slides between the housing placement area and the cover placement area.

[0056] The pressing block 5 slides vertically on the feeding push block 4 and is used to press the sound cavity cover.

[0057] Two support modules 6 are symmetrically arranged on both sides of the sound cavity housing; each support module 6 includes:

[0058] A slider 61 that slides along the length direction of the sound cavity housing under the drive of a power device;

[0059] A first sliding rod 62 slides vertically on the sliding block 61;

[0060] The second slide bar 63 slides vertically on the slide block 61, and a slide groove is provided at the bottom end;

[0061] The rotating block 64 is hinged to the bottom of the first sliding rod 62 and is provided with a sliding column extending into the sliding groove; the rotating block 64 is also provided with a rotating wheel 65.

[0062] Based on the above-mentioned speaker ultra-thin sound cavity welding equipment, the present invention uses the following speaker ultra-thin sound cavity welding method to weld the sound cavity, including:

[0063] S10: The first slide bar 62 and the second slide bar 63 are both raised, so that the rotating wheel 65 moves up to the highest position; the lower pressing block 5 and the welding head 3 are also moved up to the highest position;

[0064] S20: Place the sound cavity shell on the workbench 1, use the clamping block 2 to press against the side wall of the sound cavity shell, then the first slide bar 62 and the second slide bar 63 are lowered, so that the rotating wheel 65 presses the inner side wall of the sound cavity shell in the length direction, and the slide block 61 moves to the position closest to the loading push block 4; place the sound cavity cover plate on the workbench 1, and then the lower pressing block 5 is lowered to press the sound cavity cover plate;

[0065] S30: The loading push block 4 moves toward the sound cavity housing to send the sound cavity cover plate to the sound cavity housing; the slider 61 moves synchronously with the loading push block 4, and when the rotating wheel 65 is about to reach the side of the sound cavity housing, the first slide bar 62 and the second slide bar 63 rise to make the rotating wheel 65 move up to the highest point;

[0066] S40: After the sound cavity cover covers the sound cavity shell, the position of the loading push block 4 is kept unchanged. At this time, the lower pressing block 5 will continue to maintain the pressure on the sound cavity cover, so that the sound cavity cover is close to the sound cavity shell and generates downward pressure on the sound cavity shell, so that the sound cavity shell keeps the side wall deformed toward the outer shape; then the welding head 3 located in the length direction of the sound cavity shell descends to perform welding;

[0067] S50: After welding, the welding head 3 is reset, the feeding push block 4 drives the lower pressure block 5 to move upward to remove the downward pressure and reset, and then the welding head 3 located in the width direction of the sound cavity shell is lowered for welding, and the welding of the sound cavity can be completed.

[0068] The specific principle of this welding equipment is as follows:

[0069] The length direction of the sound cavity is relatively long and is therefore the area most prone to deformation. During welding, it is necessary to ensure that the side walls of the sound cavity shell here do not deform inward.

[0070] During operation, when the loading push block 4 pushes the sound cavity cover plate to contact the sound cavity housing, the pressure exerted by the lower pressing block 5 on the sound cavity cover plate will be transmitted to the side wall of the sound cavity housing. As shown in Figure 5 When this happens, the descending runner 65 will press against the inside of the side wall of the sound cavity housing, applying an outward abutting force to the side wall of the housing. In this way, when the side wall of the housing deforms, it will only deform outward. Then, the clamping block 2 will further limit the degree of deformation, so as to ensure that the deformation of the side wall of the housing will not be too large. During subsequent welding, the welding head 3 can apply sufficient pressure to the sound cavity to ensure the welding quality. Moreover, during the process of the loading push block 4 transporting the sound cavity cover plate, since the slider 61 will move synchronously with the loading push block 4, the runner 65 will also move along with the movement of the sound cavity cover plate, thereby pushing the side walls of the entire length direction of the sound cavity housing outward, so as to ensure the welding quality of the entire length direction of the sound cavity housing.

[0071] After welding in the length direction first, the longer two sides of the sound cavity cover plate and the sound cavity housing have been connected into one body. In this way, when welding in the width direction later, due to the limitation of the already welded part, there will be no inward deformation in the width direction. Therefore, there is no need to use the structure of the support module 6, and direct welding can be carried out.

[0072] When necessary, the clamping block 2 can be provided with a concave curved surface structure on the surface in contact with the side wall of the sound cavity housing. In this way, it can better maintain the outward deformation of the side wall of the sound cavity housing. The curved surface structure should be as shallow as possible and the radius should be as large as possible, so as to maintain the outward deformation of the side wall of the sound cavity housing while not allowing the side wall of the sound cavity housing to have too much deformation space, avoiding the pressure on the sound cavity when the welding head 3 presses down being insufficient due to excessive deformation of the side wall of the sound cavity housing, which affects the welding quality.

[0073] The specific shape of the rotating block 64 can be designed according to the installation situation inside the sound cavity. For example, it can be various shapes as shown in Figure 5 and Figures 9 to 10 so as to avoid interference between the rotating block 64 and the internal structure of the sound cavity.

[0074] The actions of the first sliding rod 62 and the second sliding rod 63 can be realized by various existing power technologies such as electric push rods. However, since these technologies require a relatively precise electric control system to ensure that the first sliding rod 62 and the second sliding rod 63 can perform accurate actions at specific positions, they are relatively dependent on the electric control system, with high costs and poor reliability. To solve the above problems, this welding equipment provides a support module 6 with a lower cost and higher reliability that is purely mechanically controlled. Each support module 6, in addition to the aforementioned structure, will also include:

[0075] The guide plate 66 is arranged above the workbench 1 and is usually installed on the same frame as the workbench 1 to keep it relatively fixed with respect to the workbench 1. The guide plate 66 is provided with a first guide groove 66a and a second guide groove 66b. As Figure 8 shown, one end of the first guide groove 66a away from the loading push block 4 slopes upward, and one end of the second guide groove 66b away from the loading push block 4 slopes upward;

[0076] A first guide post 62a is fixedly arranged on the first slide bar 62, and the first guide post 62a extends into the first guide groove 66a;

[0077] A second guide post 63a is fixedly arranged on the second slide bar 63, and the second guide post 63a extends into the second guide groove 66b.

[0078] During operation, as long as the slider 61 moves, it can drive the first slide bar 62 and the second slide bar 63 to different positions of the first guide groove 66a and the second guide groove 66b. In this way, the first guide post 62a and the second guide post 63a in the first guide groove 66a and the second guide groove 66b change their heights with the change of position, thereby driving the first slide bar 62 and the second slide bar 63 to rise and fall. In this structure, it can be ensured that the first slide bar 62 and the second slide bar 63 can act in time when moving to the corresponding positions, and the situation that the runner 65 collides with the side wall in the width direction of the sound cavity housing due to the delay of the electric control system will not occur.

[0079] In order to reduce the friction between the first guide post 62a and the second guide post 63a and the first guide groove 66a and the second guide groove 66b and improve the service life of the equipment, guide rollers can be arranged on both the first guide post 62a and the second guide post 63a.

[0080] Preferably, the length of the inclined part of the first guide groove 66a is less than the length of the inclined part of the second guide groove 66b. In this way, when the slider 61 slides to this position, that is, when the first slide bar 62 and the second slide bar 63 need to rise, the second slide bar 63 will contact the inclined part before the first slide bar 62, that is, the second slide bar 63 will rise earlier than the first slide bar 62. In this way, the rotating block 64 can be rotated first to separate the runner 65 from the side wall of the sound cavity housing, as Figure 6As shown, the first slide bar 62 and the second slide bar 63 will then rise together to move the rotating block 64 and the rotating wheel 65 out of the sound cavity housing. Similarly, when descending, the first slide bar 62 and the second slide bar 63 will first descend together to make the rotating block 64 and the rotating wheel 65 enter the sound cavity housing, and then the second slide bar 63 will descend alone for a distance to drive the rotating block 64, so that the rotating wheel 65 sticks to the side wall of the sound cavity housing. If the inclined portion of the first guide groove 66a is the same length as the inclined portion of the second guide groove 66b, then the first slide bar 62 and the second slide bar 63 will rise and fall together, and at this time the rotating wheel 65 is still pressed on the side wall of the sound cavity housing, so it is easy to scratch the side wall of the sound cavity housing, or it will drive the sound cavity housing to rise and fall together, affecting the normal welding of the sound cavity.

[0081] It is preferred that the inclined portion of the first guide groove 66a and the inclined portion of the second guide groove 66b are parallel to each other, so that when the first slide bar 62 and the second slide bar 63 slide up and down, the sliding speeds of the two will remain consistent, thereby ensuring the overall stability of the welding equipment.

[0082] In order to leave room for the welding head 3, the support module 6, etc. to move, the power device that drives the loading push block 4 can only be set on the side away from the welding head, and auxiliary components such as guide rails cannot be installed. Therefore, after the loading push block 4 is pushed out to the top of the sound cavity shell, due to the lack of limit, it is easy to cause it to tilt upward, affecting its downward pressure on the sound cavity cover. Therefore, the design of this welding equipment uses a guide plate 66 for auxiliary limit, and the specific structure is as follows:

[0083] The first guide groove 66a or the second guide groove 66b is connected to the side wall of the guide plate 66 near one end of the loading push block 4; the loading push block 4 is provided with a support roller 41 aligned with the corresponding first guide groove 66a or second guide groove 66b. When the loading push block 4 is pushed out to the top of the sound cavity housing, the support roller 41 will enter the first guide groove 66a or the second guide groove 66b to form a limit position to prevent the loading push block 4 from tilting upward.

[0084] Preferably, a third slide bar 67 and a fourth slide bar 68 are also provided in the support module 6;

[0085] The third slide bar 67 slides vertically on the slider 61 and is fixedly connected to the first slide bar 62 by a connecting block, so that the first slide bar 62 and the third slide bar 67 can move synchronously, and the first slide bar 62 is restricted from rotating to prevent the first slide bar 62 from rotating and affecting its connection with the rotating block 64; similarly, the fourth slide bar 68 slides vertically on the slider 61 and is fixedly connected to the second slide bar 63 by a connecting block, so that the second slide bar 63 and the fourth slide bar 68 can move synchronously, and the second slide bar 63 is restricted from rotating to prevent the second slide bar 63 from rotating and affecting its connection with the rotating block 64.

[0086] Since the support module 6 occupies a part of the space, in order to prevent the feeding push block 4 from hitting the support module 6, the support module 6 can only press a part of the sound cavity cover plate. The part of the sound cavity cover plate facing the support module 6 needs to be vacated. In order to form a limit for this part, the welding equipment further optimizes the design of the support module 6. When the first slide bar 62 and the second slide bar 63 rise to the highest point, the rotating block 64 will drive the rotating wheel 65 to rotate to the vertical direction, and the height of the bottom of the rotating wheel 65 is aligned with the height of the sound cavity cover plate, as Figure 7 shown, so that the rotating wheel 65 can press the sound cavity cover plate to complete the limit of the sound cavity cover plate.

[0087] Preferably, a plurality of pneumatic push rods 42 are arranged on the feeding push block 4. The pressing block 5 is driven by the pneumatic push rods 42, and the pneumatic push rods 42 are driven by high-pressure gas. This driving method will produce an overload protection effect, effectively preventing the pressure of the pressing block 5 on the sound cavity cover plate from being too large and causing damage to the sound cavity cover plate. Preferably, a rubber bottom plate is arranged at the bottom of the pressing block 5 to increase the friction force on the sound cavity cover plate through the rubber bottom plate and ensure the driving effect on the sound cavity cover plate.

[0088] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A speaker ultra-thin sound cavity welding device, characterized in that: include: A workbench (1), independently fixed; A plurality of clamping blocks (2) are arranged on the workbench (1) and fit closely to the side surfaces of the sound cavity housing; A plurality of welding heads (3) are arranged above the workbench (1) and move towards and away from the workbench (1); A loading push block (4) slides on the workbench (1) along the length direction of the sound cavity shell; A lower pressing block (5) slides vertically on the feeding pushing block (4); Two support modules (6) are symmetrically arranged on both sides of the sound cavity housing; each of the support modules (6) comprises: A slider (61) slides along the length direction of the sound cavity housing; A first sliding rod (62) slides vertically on the sliding block (61); A second sliding rod (63) slides vertically on the sliding block (61) and has a sliding groove at its bottom end; A rotating block (64) is hinged to the bottom of the first sliding rod (62) and is provided with a sliding column extending into the sliding groove; a rotating wheel (65) is also provided on the rotating block (64); A guide plate (66) is arranged above the workbench (1) and fixed relative to the workbench (1); a first guide groove (66a) and a second guide groove (66b) are arranged on the guide plate (66); an end of the first guide groove (66a) away from the loading push block (4) is inclined upward, and an end of the second guide groove (66b) away from the loading push block (4) is inclined upward; A first guide column (62a) is fixedly arranged on the first slide bar (62), and the first guide column (62a) extends into the first guide groove (66a); A second guide column (63a) is fixedly arranged on the second slide bar (63), and the second guide column (63a) extends into the second guide groove (66b); The length of the inclined portion of the first guide groove (66a) is shorter than the length of the inclined portion of the second guide groove (66b); the inclined portion of the first guide groove (66a) and the inclined portion of the second guide groove (66b) are parallel to each other; During operation, when the loading push block (4) pushes the sound cavity cover plate to contact the sound cavity shell, the pressure exerted by the lower pressing block (5) on the sound cavity cover plate will be transmitted to the side wall of the sound cavity shell. At this time, the lowered rotating wheel (65) will press the inside of the side wall of the sound cavity shell, exerting an abutting force from the inside to the outside on the side wall of the shell, and the clamping block (2) limits the degree of deformation of the side wall of the sound cavity shell; in the process of the loading push block (4) transporting the sound cavity cover plate, the slider (61) moves synchronously with the loading push block (4), so that the rotating wheel (65) will also move with the movement of the sound cavity cover plate, thereby pushing the side wall of the sound cavity shell in the entire length direction outward.

2. The speaker ultra-thin sound cavity welding equipment according to claim 1 is characterized in that: Guide rollers are arranged on the first guide column (62a) and the second guide column (63a).

3. The speaker ultra-thin sound cavity welding equipment according to claim 1 is characterized in that: One end of the first guide groove (66a) or the second guide groove (66b) close to the loading push block (4) is connected to the side wall of the guide plate (66); and a supporting roller (41) aligned with the first guide groove (66a) or the second guide groove (66b) is provided on the loading push block (4).

4. The speaker ultra-thin sound cavity welding equipment according to claim 1 is characterized in that: The support module (6) further comprises: a third sliding rod (67) which slides vertically on the sliding block (61) and is fixedly connected to the first sliding rod (62); The fourth sliding rod (68) slides vertically on the sliding block (61) and is fixedly connected to the second sliding rod (63).

5. The speaker ultra-thin sound cavity welding equipment according to claim 1 is characterized in that: A plurality of pneumatic push rods (42) are arranged on the loading push block (4), and the lower pressing block (5) is driven by the pneumatic push rods (42).

6. The speaker ultra-thin sound cavity welding device according to claim 5 is characterized in that: A rubber bottom plate is arranged at the bottom of the lower pressing block (5).

7. A method for welding an ultra-thin sound cavity of a loudspeaker, characterized in that: The ultra-thin sound cavity welding device for a loudspeaker as claimed in any one of claims 1 to 6 comprises: S10: The first slide bar (62) and the second slide bar (63) are both raised, so that the rotating wheel (65) moves up to the highest position; the lower pressing block (5) and the welding head (3) are also moved up to the highest position; S20: placing the sound cavity shell on the workbench (1), using the clamping block (2) to press against the side wall of the sound cavity shell, then lowering the first slide bar (62) and the second slide bar (63) so that the rotating wheel (65) presses against the inner side wall of the sound cavity shell in the length direction, and the slide block (61) moves to the position closest to the loading push block (4); placing the sound cavity cover plate on the workbench (1), and then lowering the pressing block (5) to press against the sound cavity cover plate; S30: the loading push block (4) moves toward the sound cavity housing to send the sound cavity cover plate toward the sound cavity housing; the slider (61) moves synchronously with the loading push block (4), and when the rotating wheel (65) is about to reach the side of the sound cavity housing, the first slide bar (62) and the second slide bar (63) rise to move the rotating wheel (65) to the highest position; S40: After the sound cavity cover plate covers the sound cavity shell, the position of the loading push block (4) is kept stationary, and the welding head (3) located in the length direction of the sound cavity shell is lowered to perform welding; S50: After welding, the welding head (3) and the material loading push block (4) are reset, and then the welding head (3) located in the width direction of the sound cavity shell is lowered to perform welding, thereby completing the welding of the sound cavity.

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