Automatic feeding device for sound box net cover

Abstract

The invention discloses an automatic feeding device for a sound box net cover, and relates to the technical field of sound box production, and the automatic feeding device comprises an automatic feeding assembly.In the using process of the automatic feeding device, a cartridge holder bin is arranged in the middle of a side plate, and a buffering distance is reserved for a sound box body, transferred to a conveying belt, of a net cover body; and when the push plate carries the net cover body to move within the buffer distance, the rack driving piece on one side of the end face of the push plate is meshed with the tooth shape of the bottom side of the double-end toothed bar, and the rack driving piece on one side of the end face of the push plate is driven by the air cylinder to be in linkage fit with the annular dispensing assembly, so that intermittent pushing and discharging of the net cover body are achieved, and meanwhile, the net cover body can be continuously discharged. And in the process that the mesh enclosure body moves within the buffering distance, through meshing transmission of a rack driving piece on one side of the end face of a push plate and a double-end rack rod, a gear ring is driven to rotate, glue dispensing operation is conducted on an annular mesh enclosure support of the sound box body through a glue dispensing valve, and glue dispensing pretreatment before the mesh enclosure body and the sound box body are combined is completed.

Description

Technical Field

[0001] The invention relates to the technical field of audio production, in particular to an automatic audio mesh cover insertion device. Background Art

[0002] The core component of the audio is the speaker. Common speakers usually include a U cup, a bracket, a mesh cover, and a magnetic circuit unit installed in the space formed by the U cup, the bracket, and the mesh cover.

[0003] In the production process of traditional technology, it is necessary to manually place the mesh cover on the conveyor belt, and coat the glue through the dust cover glue coating component and the mesh cover glue coating component in turn, and then assemble the mesh cover and the bracket, and finally press the mesh cover through the mesh cover pressing component to fix the mesh cover and the bracket with glue. The above production process not only requires manual input of the mesh cover, resulting in low production efficiency, but also the input of the mesh cover material, the dispensing of glue at the joint between the mesh cover and the speaker, and the buckling and compaction of the mesh cover and the speaker all require different devices to be executed separately. The linkage between the devices is not strong, resulting in a low degree of automation and high production costs.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and an automatic input device for an acoustic grille cover is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic device for inserting a sound grille cover to solve the problems raised in the above background technology.

[0006] The top end of the push plate is fixed with a toothed plate, and the bottom end of the push plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate, and the toothed plate is fixed with a toothed plate

[0007] Furthermore, the side panels are fixedly mounted on one side of the frame of the conveyor belt, and the top of the conveyor belt is evenly spaced along the length direction with the speaker bodies.

[0008] Further, an annular dispensing assembly is provided above the conveyor belt. The annular dispensing assembly includes an extension plate and a guide groove. The tail of the extension plate is fastened to the end of the magazine through bolts, and a semi-circular guide groove is provided at the notch of the head of the extension plate.

[0009] Further, the annular dispensing assembly further includes a gear ring, a boss, and a dispensing valve. A gear ring is rotatably installed in the notch of the head of the extension plate, and the annular protrusion at the bottom of the gear ring is matched with the guide groove to achieve limit. A boss is fixed on the inner ring surface of the gear ring, and a dispensing valve is embedded in the middle of the boss.

[0010] Further, the annular dispensing assembly further includes a bushing and a double-headed tooth bar. A bushing is embedded on the side end of the head of the extension plate, and a double-headed tooth bar is rotatably installed inside the bushing. The tooth shape on the bottom side of the double-headed tooth bar is meshed and driven with the rack driving member, and the tooth shape on the top side of the double-headed tooth bar is meshed and driven with the gear ring.

[0011] Further, a linkage pressing-down assembly is fixedly installed on the other side of the conveyor belt. The linkage pressing-down assembly includes a vertical plate, guide rails, and sliders. The vertical plate is fixed to the other side of the frame of the conveyor belt. Guide rails are fixedly installed on both sides of the end face of the vertical plate, and sliders are slidably installed outside the guide rails.

[0012] Further, the linkage pressing-down assembly further includes a connecting arm, a pressing plate, and a driven pin. A connecting arm with an "L" shape is fixedly installed on the end face of the slider, and a pressing plate is fixedly installed at the end of the corner of the connecting arm. The outer diameter of the pressing plate is smaller than the inner diameter of the gear ring and is coaxially arranged with the gear ring. A driven pin is connected to the bottom of the side of the slider.

[0013] Further, the linkage pressing-down assembly further includes a mounting seat, a V-shaped pin, and a torsion spring. A mounting seat is fixedly installed on the side of the vertical plate, and a V-shaped pin is rotatably installed inside the notch of the mounting seat. The V-shaped pin is elastically matched with the mounting seat through the torsion spring.

[0014] Further, the linkage pressing-down assembly further includes a rubber roller. One end of the V-shaped pin is connected with a rubber roller, and the rubber roller is in abutting cooperation with the ejector rod driving member.

[0015] Further, the linkage pressing-down assembly further includes a slot. A slot is opened at the other end of the V-shaped pin, and the slot is slidably matched with the driven pin connected to the side of the slider.

[0016] The present invention provides an automatic feeding device for a speaker grille, having the following beneficial effects; 1. During the use of the present invention, when the dispensing operation of the annular mesh cover bracket of the sound box body is completed, the mesh cover body carried by the push plate also passes through the reserved buffer distance. The ejector rod driving part on the other side of the end face of the push plate driven by the air cylinder is in linkage cooperation with the linkage pressing component. After the intermittent feeding of the mesh cover body and the annular dispensing operation at the joint part of the sound box body are completed, the pressing operation of the pressing plate can be continuously completed, constituting a complete assembly process of the input of the mesh cover material, the dispensing at the joint part of the mesh cover and the sound box, and the buckling and compaction of the mesh cover and the sound box. The continuous execution of the above assembly operations only requires one air cylinder as the power source and is continuously executed through the linkage cooperation between devices, greatly improving the automation degree of the sound box mesh cover assembly and the production efficiency.

[0017] 2. During the use of the present invention, by arranging the magazine in the middle of the side plate, a buffer distance is left for the mesh cover body to be transported to the sound box body on the conveyor belt. When the push plate carries the mesh cover body and moves within this buffer distance, the rack driving part on one side of the end face of the push plate meshes with the tooth shape on the bottom side of the double-headed tooth rod. The present application drives the rack driving part on one side of the end face of the push plate by the air cylinder to be in linkage cooperation with the annular dispensing component. While realizing the intermittent feeding of the mesh cover body, during the process of the mesh cover body moving within the buffer distance, through the meshing transmission between the rack driving part on one side of the end face of the push plate and the double-headed tooth rod, the tooth ring is driven to rotate and the annular mesh cover bracket of the sound box body is dispensed through the dispensing valve, completing the dispensing pretreatment before the combination of the mesh cover body and the sound box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the execution state of the dispensing process of the present invention; Figure 2 Schematic diagram of the execution state of the pressing process of the present invention; Figure 3 Schematic cross-sectional structure diagram of the automatic input component of the present invention; Figure 4 Exploded structure diagram of the automatic input component of the present invention; Figure 5 Exploded structure diagram of the annular dispensing component of the present invention; Figure 6 Schematic cross-sectional structure diagram of the annular dispensing component of the present invention; Figure 7 Schematic structure diagram of the linkage pressing component of the present invention.

[0019] In the figure: 1. Automatic feeding component; 101. Side plate; 102. Magazine; 103. Pushing slot; 104. Discharge hole; 105. Storage rod; 106. Mesh cover body; 107. Push plate; 108. Cylinder; 109. Limit notch; 110. Rack driving part; 111. Ejector rod driving part; 2. Conveyor belt; 3. Speaker body; 4. Ring-shaped dispensing component; 401. Extension plate; 402. Guide groove; 403. Gear ring; 404. Boss; 405. Dispensing valve; 406. Bush; 407. Double-headed rack; 5. Linkage pressing-down component; 501. Vertical plate; 502. Guide rail; 503. Slide block; 504. Connecting arm; 505. Pressure plate; 506. Driven pin; 507. Mounting seat; 508. V-shaped pin; 509. Torsion spring; 510. Rubber roller; 511. Slot. Detailed implementation manners

[0020] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] Please refer to Figures 1 to 4 , the present invention provides a technical solution: an automatic feeding device for a speaker mesh cover, including an automatic feeding component 1. The automatic feeding component 1 includes a side plate 101, a magazine 102, a pushing slot 103, a discharge hole 104, a storage rod 105, a mesh cover body 106, a push plate 107, a cylinder 108, a limit notch 109, a rack driving part 110 and an ejector rod driving part 111. The magazine 102 is bolted and fixed in the middle of the side plate 101, and a pushing slot 103 is radially opened at the bottom of the magazine 102. A discharge hole 104 is axially opened at the top of the magazine 102, and the bottom end of the discharge hole 104 is vertically communicated with the middle of the pushing slot 103. At least four storage rods 105 are fixedly arranged in a circular distribution on the top surface of the magazine 102, and the four storage rods 105 form a storage space for storing the mesh cover body 106. A push plate 107 is slidably installed along the length direction inside the pushing slot 103. An installation plate on the side plate 101 is hinged with a cylinder 108, and the push plate 107 is fixedly connected to the output end of the cylinder 108. A limit notch 109 is opened in the middle of the end face of the push plate 107, a rack driving part 110 is fixedly connected to one side of the end face of the push plate 107, and an ejector rod driving part 111 is fixedly connected to the other side of the end face of the push plate 107; The specific operation is as follows. The net cover bodies are stacked axially inside the storage rod 105 in sequence. Under the action of gravity, the net cover body at the bottom falls into the middle of the pushing groove 103 vertically connected thereto through the discharge hole 104. During use, under the push of the air cylinder 108, the push plate 107 receives and transports the net cover body through the limit notch 109 in the middle of the end face, thereby realizing the automatic continuous input of the net cover body. During this process, the sound box body 3 is intermittently conveyed by the conveyor belt 2 and stops at a preset assembly station waiting for the assembly operation with the net cover body 106. In this application, by arranging the magazine 102 in the middle of the side plate 101, a buffer distance is left for the net cover body to be transported to the sound box body 3 on the conveyor belt 2; Please refer to Figures 5 to 6 , the side plate 101 is fixedly installed on one side of the frame body of the conveyor belt 2, and the sound box bodies 3 are arranged at equal intervals along the length direction on the top of the conveyor belt 2. An annular dispensing assembly 4 is arranged above the conveyor belt 2. The annular dispensing assembly 4 includes an extension plate 401 and a guide groove 402. The tail of the extension plate 401 and the end of the magazine 102 are fastened by bolts. A semicircular guide groove 402 is provided at the notch of the head of the extension plate 401. The annular dispensing assembly 4 further includes a gear ring 403, a boss 404, and a dispensing valve 405. The gear ring 403 is rotatably installed in the notch of the head of the extension plate 401, and the annular protrusion at the bottom of the gear ring 403 is matched with the guide groove 402 to achieve limit. A boss 404 is fixed on the inner ring surface of the gear ring 403, and a dispensing valve 405 is embedded in the middle of the boss 404. The annular dispensing assembly 4 further includes a bushing 406 and a double-headed toothed rod 407. The bushing 406 is embedded in the side end of the head of the extension plate 401, and the double-headed toothed rod 407 is rotatably installed inside the bushing 406. The bottom tooth shape of the double-headed toothed rod 407 is meshed and driven with the rack driving member 110, and the top tooth shape of the double-headed toothed rod 407 is meshed and driven with the gear ring 403; The specific operation is as follows. When the push plate 107 carries the mesh cover body and moves at this buffer distance, the rack driving member 110 on one side of the end face of the push plate 107 drives the bottom-side tooth shape of the double-headed tooth rod 407 through meshing, and then drives the top-side tooth shape of the double-headed tooth rod 407 to mesh with the tooth ring 403, driving the tooth ring 403 to rotate in the guide groove 402 of the notch at the end of the extension plate 401. By installing the dispensing valve 405 in one or two bosses 404 on the inner wall of the tooth ring 403, the dispensing valve 405 can be driven to perform dispensing operations on the annular mesh cover bracket of the audio body 3 during the rotation of the tooth ring 403. In this application, the rack driving member 110 on one side of the end face of the push plate 107 driven by the cylinder 108 is linked and coordinated with the annular dispensing assembly 4. While realizing the intermittent pushing and discharging of the mesh cover body 106, during the movement of the mesh cover body 106 within the buffer distance, through the meshing transmission between the rack driving member 110 on one side of the end face of the push plate 107 and the double-headed tooth rod 407, the tooth ring 403 is driven to rotate and the dispensing valve 405 performs dispensing operations on the annular mesh cover bracket of the audio body 3, completing the dispensing pretreatment before the combination of the mesh cover body 106 and the audio body 3; Please refer to Figure 7 , a linkage pressing-down assembly 5 is fixedly installed on the other side of the conveyor belt 2. The linkage pressing-down assembly 5 includes a vertical plate 501, guide rails 502 and sliders 503. The vertical plate 501 is fixed to the other side of the frame of the conveyor belt 2. Guide rails 502 are fixedly installed on both sides of the end face of the vertical plate 501, and sliders 503 are slidably installed outside the guide rails 502. The linkage pressing-down assembly 5 further includes a connecting arm 504, a pressing plate 505 and a driven pin 506. The slider 503 is fixedly installed with an "L"-shaped connecting arm 504 at the end face, and a pressing plate 505 is fixedly installed at the end of the corner of the connecting arm 504. And the outer diameter of the pressing plate 505 is smaller than the inner diameter of the tooth ring 403 and is coaxially arranged with the tooth ring 403. A driven pin 506 is connected to the bottom of the side of the slider 503. The linkage pressing-down assembly 5 further includes a mounting seat 507, a V-shaped pin 508 and a torsion spring 509. The mounting seat 507 is fixedly installed on the side of the vertical plate 501, and a V-shaped pin 508 is rotatably installed inside the notch of the mounting seat 507, and the V-shaped pin 508 is elastically matched with the mounting seat 507 through the torsion spring 509. The linkage pressing-down assembly 5 further includes a rubber roller 510. One end of the V-shaped pin 508 is connected with the rubber roller 510, and the rubber roller 510 is in abutting cooperation with the ejector rod driving member 111. The linkage pressing-down assembly 5 further includes a slot 511. A slot 511 is opened at the other end of the V-shaped pin 508, and the slot 511 is slidably matched with the driven pin 506 connected to the side of the slider 503; The specific operation is as follows. When the dispensing operation of the annular grille bracket of the sound box body 3 is completed, the grille cover body carried by the push plate 107 also passes through the reserved buffer distance and accurately falls above the annular grille bracket of the sound box body 3. Specifically, the sound box body 3 is located on the conveyor belt 2, so that the top plane of the sound box body 3 is lower than the height of the two side frames, and the height of the side plate 101 is flush with the frame of the conveyor belt 2, that is, higher than the top plane of the sound box body 3. Therefore, when moving within the buffer distance, the grille cover body 106 is supported by the side plate 101 and will not fall, nor will it be combined with the sound box body 3. The existence of this buffer distance is to reserve time for dispensing. After the dispensing is completed, the grille cover body 106 passes through this buffer distance and falls due to the height difference between the frame of the conveyor belt 2 and the sound box body 3. Thereafter, the empty push plate 107 continues to move forward until the ejector rod driving part 111 on the other side of its end face abuts against the rubber roller 510 on one side of the V-shaped pin 508, causing the V-shaped pin 508 to rotate within the mounting seat 507 against the elastic force of the torsion spring 509. Then, through the cooperation between the other side slot 511 of the V-shaped pin 508 and the driven pin 506 on the side of the slider 503, the slider 503 is pulled to move down along the guide rail 502 on the end face of the vertical plate 501. During the downward movement of the slider 503, the pressing plate 505 fixedly connected to its end face through the connecting arm 504 passes through the middle hole gap of the gear ring 403 and contacts the grille cover body. By pressing down the pressing plate 505, the grille cover body is firmly bonded to the sound box body 3 through glue. In this application, through the linkage cooperation between the ejector rod driving part 111 on the other side of the end face of the push plate 107 driven by the air cylinder 108 and the linkage pressing-down assembly 5, after the intermittent feeding and discharging of the grille cover body and the annular dispensing operation at the joint of the sound box body 3 are completed, the pressing-down operation of the pressing plate 505 can be continuously completed, constituting a complete assembly process of the input of the grille cover material, the dispensing at the joint of the grille cover and the sound box, and the buckling and compaction of the grille cover and the sound box. The continuous execution of the above assembly operations only requires one air cylinder 108 as the power source and is continuously executed through the linkage cooperation between the devices, greatly improving the automation degree of the sound box grille assembly and the production efficiency.

[0022] In summary, when using the automatic feeding device for the speaker grille cover, stack the grille cover bodies axially inside the storage rod 105 in sequence. Under the action of gravity, the grille cover body at the bottom drops into the middle of the ejection groove 103 vertically connected thereto through the discharge hole 104. During use, under the push of the cylinder 108, the push plate 107 receives and transports the grille cover body through the limit notch 109 in the middle of the end face, thereby realizing the automatic continuous feeding of the grille cover body. During this process, the speaker body 3 is intermittently conveyed by the conveyor belt 2 and stops at a preset assembly station waiting for the assembly operation with the grille body 106. This application follows the technical solution of the prior art that uses a photoelectric switch to monitor the position of the grille body 106 and accurately stop at the preset assembly station. The specific model of the photoelectric switch used is E3S-DS30E4. By arranging the magazine 102 in the middle of the side plate 101 in this application, a buffer distance is left for the grille cover body to be transported to the speaker body 3 on the conveyor belt 2. When the push plate 107 carries the grille cover body and moves within this buffer distance, the rack driving member 110 on one side of the end face of the push plate 107 drives through the engagement with the bottom tooth profile of the double-headed tooth rod 407, and then drives the rotation of the gear ring 403 in the guide groove 402 of the notch at the end of the extension plate 401 through the engagement of the top tooth profile of the double-headed tooth rod 407 with the gear ring 403. By installing a dispensing valve 405 in one or two bosses 404 on the inner wall of the gear ring 403, the dispensing valve 405 can be driven to perform a dispensing operation on the annular grille bracket of the speaker body 3 during the rotation of the gear ring 403. By linking and cooperating the rack driving member 110 on one side of the end face of the push plate 107 driven by the cylinder 108 with the annular dispensing assembly 4 in this application, while realizing the intermittent pushing and discharging of the grille body 106, during the movement of the grille body 106 within the buffer distance, through the meshing transmission of the rack driving member 110 on one side of the end face of the push plate 107 and the double-headed tooth rod 407, the gear ring 403 is driven to rotate and the dispensing valve 405 performs a dispensing operation on the annular grille bracket of the speaker body 3, completing the dispensing pretreatment before the combination of the grille body 106 and the speaker body 3. When the annular grille bracket of the speaker body 3 finishes the dispensing operation, the grille cover body carried by the push plate 107 also passes through the reserved buffer distance and accurately falls above the annular grille bracket of the speaker body 3. Specifically, the speaker body 3 is located on the conveyor belt 2, making the top plane of the speaker body 3 lower than the height of the two side frames, while the height of the side plate 101 is flush with the frame of the conveyor belt 2, that is, higher than the top plane of the speaker body 3. Therefore, when moving within the buffer distance, the grille body 106 is supported by the side plate 101 and will not fall or combine with the speaker body 3. The existence of this buffer distance is to reserve time for dispensing. After the dispensing is completed, the grille body 106 passes through this buffer distance and drops due to the height difference between the frame of the conveyor belt 2 and the speaker body 3. After that, the empty push plate 107 continues to move forward until the push rod driving member 111 on the other side of its end face abuts against the rubber roller 510 on one side of the V-shaped pin 508.The V-shaped pin 508 is caused to rotate within the mounting base 507 against the elastic force of the torsion spring 509. Then, through the cooperation between the other side slot 511 of the V-shaped pin 508 and the driven pin 506 on the side surface of the slider 503, the slider 503 is pulled to move downward along the guide rail 502 on the end face of the vertical plate 501. During the downward movement of the slider 503, the pressing plate 505 fixedly connected to its end face through the connecting arm 504 passes through the middle hole clearance of the gear ring 403 and contacts the net cover body. By pressing down the pressing plate 505, the net cover body and the audio body 3 are firmly bonded together with glue. In this application, the ejector rod driving member 111 on the other side of the end face of the lower push plate 107 driven by the cylinder 108 is linked and cooperated with the linkage pressing assembly 5. After the intermittent feeding of the net cover body and the annular dotting operation at the joint of the audio body 3 are completed, the pressing operation of the pressing plate 505 can be continuously completed, forming a complete assembly process including the input of the net cover material, the dotting at the joint of the net cover and the audio, and the buckling and compaction of the net cover and the audio. The continuous execution of the above assembly operations only requires one cylinder 108 as the power source and is continuously executed through the linkage cooperation between the devices, greatly improving the automation degree of the audio net cover assembly and enhancing the production efficiency.

[0023] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. An automatic feeding device for a speaker grille cover, comprising an automatic feeding assembly (1), characterized in that, The automatic feeding component (1) includes a side plate (101), a magazine bin (102), a pushing groove (103), a discharging hole (104), a storage rod (105), a net cover body (106), a pushing plate (107), a cylinder (108), a limiting notch (109), a rack driving member (110) and a ejector rod driving member (111). A magazine bin (102) is bolted and fixed in the middle of the side plate (101), and a pushing groove (103) is radially formed at the bottom of the magazine bin (102). A discharging hole (104) is axially formed at the top of the magazine bin (102), and the bottom end of the discharging hole (104) is vertically communicated with the middle of the pushing groove (103). Not less than four storage rods (105) are fixedly arranged in a circular distribution on the top surface of the magazine bin (102), and the four storage rods (105) form a storage space for storing the net cover body (106). A pushing plate (107) is slidably installed along the length direction inside the pushing groove (103). A cylinder (108) is hinged to the mounting plate on the side plate (101), and the pushing plate (107) is fixedly connected to the output end of the cylinder (108). A limiting notch (109) is formed in the middle of the end face of the pushing plate (107), a rack driving member (110) is fixedly connected to one side of the end face of the pushing plate (107), and an ejector rod driving member (111) is fixedly connected to the other side of the end face of the pushing plate (107).

2. The automatic feeding device for a speaker grille according to claim 1, wherein The side plate (101) is fixedly installed on one side of the frame of the conveyor belt (2), and sound body (3) are arranged at equal intervals along the length direction on the top of the conveyor belt (2).

3. The automatic feeding device for the speaker grille according to claim 2, characterized in that, An annular dispensing component (4) is arranged above the conveyor belt (2). The annular dispensing component (4) includes an extension plate (401) and a guiding groove (402). The tail of the extension plate (401) is fastened to the end of the magazine bin (102) by bolts, and a semi-circular guiding groove (402) is arranged at the notch of the head of the extension plate (401).

4. The automatic feeding device for a speaker grille according to claim 3, characterized in that, The annular dispensing component (4) further includes a gear ring (403), a convex platform (404) and a dispensing valve (405). A gear ring (403) is rotatably installed in the notch of the head of the extension plate (401), and the annular protrusion at the bottom of the gear ring (403) is matched with the guiding groove (402) to achieve limiting. A convex platform (404) is fixed on the inner ring surface of the gear ring (403), and a dispensing valve (405) is embedded in the middle of the convex platform (404).

5. An automatic feeding device for a speaker grille cover according to claim 4, characterized in that, The annular dispensing component (4) further includes a bushing (406) and a double-headed tooth bar (407). A bushing (406) is embedded at the side end of the head of the extension plate (401), and a double-headed tooth bar (407) is rotatably installed inside the bushing (406). The tooth shape at the bottom side of the double-headed tooth bar (407) is meshed and driven with the rack driving member (110), and the tooth shape at the top side of the double-headed tooth bar (407) is meshed and driven with the gear ring (403).

6. The automatic feeding device for a speaker grille according to claim 5, characterized in that On the other side of the conveyor belt (2), a linkage pressing-down component (5) is fixedly installed. The linkage pressing-down component (5) includes a vertical plate (501), a guide rail (502), and a slider (503). The vertical plate (501) is fixed to the other side of the frame of the conveyor belt (2). On both sides of the end face of the vertical plate (501), the guide rails (502) are fixedly installed, and the slider (503) is slidably installed outside the guide rails (502).

7. The automatic feeding device for the sound box grille according to claim 6, characterized in that, The linkage pressing-down component (5) further includes a connecting arm (504), a pressing plate (505), and a driven pin (506). The connecting arm (504) with an "L" - shaped structure is fixedly installed on the end face of the slider (503). At the end of the corner of the connecting arm (504), the pressing plate (505) is fixedly installed. And the outer diameter of the pressing plate (505) is smaller than the inner diameter of the gear ring (403) and is coaxially arranged with the gear ring (403). The bottom of the side of the slider (503) is connected with the driven pin (506).

8. An automatic feeding device for a speaker grille, according to claim 7, characterized in that, The linkage pressing-down component (5) further includes a mounting seat (507), a V - shaped pin (508), and a torsion spring (509). The mounting seat (507) is fixedly installed on the side of the vertical plate (501). Inside the notch of the mounting seat (507), the V - shaped pin (508) is rotatably installed. And the V - shaped pin (508) is elastically matched with the mounting seat (507) through the torsion spring (509).

9. The automatic feeding device for the speaker grille according to claim 8, wherein The linkage pressing-down component (5) further includes a rubber roller (510). One end of the V - shaped pin (508) is connected with the rubber roller (510), and the rubber roller (510) is in abutting cooperation with the ejector rod driving part (111).

10. The automatic feeding device for a speaker grille according to claim 9, characterized in that, The linkage pressing-down component (5) further includes a strip groove (511). The other end of the V - shaped pin (508) is provided with the strip groove (511), and the strip groove (511) is in sliding cooperation with the driven pin (506) connected to the side of the slider (503).

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