CN112954541B - Assembling device for headphone speaker cover - Google Patents

Abstract

The invention is suitable for the field of earphones, and provides an assembling device for a loudspeaker face cover of an earphone, which comprises a loudspeaker fixing seat for fixing the loudspeaker of the earphone and a face cover fixing plate for fixing the face cover of the loudspeaker of the earphone, wherein the loudspeaker fixing seat is fixedly arranged on the top surface of a base in an integrated mode, two ends of the top surface of the base are respectively and fixedly connected with the bottom end of a vertically-arranged supporting plate, the top end of the supporting plate is respectively and fixedly connected with two ends of the bottom surface of a top plate, the face cover fixing plate is arranged below the top plate between the supporting plates, the two ends of the top surface of the face cover fixing plate are respectively and fixedly connected with the bottom end of a vertically-arranged hydraulic rod, and connecting blocks are symmetrically welded and fixedly connected with the two sides of the face cover fixing plate and are in sliding connection with the supporting plate.

Description

Assembling device for headphone speaker cover

Technical field

The invention belongs to the field of earphones, and in particular relates to an assembly device for an earphone horn cover.

Background technique

Because the use of earphones allows one to listen to music alone without disturbing others, it is loved by people. The earphones convert and pronounce the received electrical signals through the speaker unit. The earphone speakers mainly include a sound membrane, a voice coil and an earphone holder. The earphone holder It includes a disc-shaped iron basin as a whole, a magnet is arranged in the recessed part of the iron basin, and a circuit board is arranged on the back of the recessed part.

When assembling the earphones, the cover needs to be assembled to the speaker. Since the earphone cable needs to be welded and connected to the circuit board on the earphone holder, the circumferential positional relationship between the earphone speaker and the earphone cover needs to be determined.

In the existing technology, calibration is usually performed manually, which is inconvenient to use and greatly reduces the assembly efficiency of workers.

Contents of the invention

The present invention provides an assembly device for an earphone speaker cover, aiming to solve the problem that the earphone speaker and the cover need to be calibrated circumferentially during assembly, thereby reducing the assembly efficiency of the cover.

The invention is implemented in this way. An assembly device for an earphone speaker cover includes a speaker fixing seat for fixing the earphone speaker and a cover fixing plate for fixing the cover of the earphone speaker. The speaker fixing seat passes through It is integrally formed and fixedly installed on the top surface of the base. Both ends of the top surface of the base are fixedly connected to the bottom end of a vertically installed support plate. The top end of the support plate is fixedly connected to both ends of the bottom surface of the top plate. The bottom of the top plate A face cover fixing plate is installed between the support plates. The two ends of the top surface of the face cover fixing plate are fixedly connected to the bottom end of a vertically installed hydraulic rod. The top end of the hydraulic rod is fixedly connected to the bottom surface of the top plate. The face cover Connecting blocks are symmetrically welded and fixed on both sides of the fixed plate, and the connecting blocks are slidingly connected to the support plate.

Furthermore, a vertical lifting rod is slidably installed in the middle of the cover fixing plate. The bottom end of the lifting rod is welded and fixed with a limit block. The top surface of the limit block is fixedly connected to the bottom end of the first spring. The first spring The top end is fixedly connected to the bottom surface of the cover fixing plate. The top of the lifting rod is welded and fixed with a lifting handle. The part of the lifting rod located above the surface cover fixing plate is welded and fixed with a horizontal lifting plate. The two ends of the bottom surface of the lifting plate are respectively connected with a vertical The top of the vertically installed lifting rod is fixedly connected. The bottom end of the lifting rod is hinged with the bottom end of a connecting plate. The top of the connecting plate is hinged with the top of a vertically installed sliding plate. The bottom surface of the cover fixed plate is provided with Regarding the symmetrically arranged groove of the lifting rod, two slide blocks are slidably installed in the groove. The opposite sides of the slide blocks are fixedly connected to one end of a second spring, and the other end of the second spring is fixedly connected to a clamping block. , the opposite side of the clamping block forms a cavity with the same shape as the cover, the top surface of the slider is fixedly connected to the bottom end of the vertically installed sliding plate, and the fixed plate of the cover is provided with a chute for the sliding plate to slide .

Furthermore, a vertical guide groove is provided in the middle of the speaker holder corresponding to the position of the limiting block, and a speaker groove is provided symmetrically with respect to the guide groove on the top surface of the speaker holder. The shape and position of the speaker groove corresponds to the clamping block. In the cavity formed, a second piston is slidably installed in the guide groove, and the bottom of the guide groove is fixedly connected to one end of the connecting pipe, and the other end of the connecting pipe is fixedly connected to the bottom end of the vertically installed fixed cylinder, and the fixed cylinder is integrated The first piston is fixedly installed on the top surface of the base in a molding manner. The first piston is slidably installed in the fixed cylinder. The first piston is fixedly connected to the bottom end of the pressure rod. The top of the pressure rod extends out of the fixed cylinder and a pressure plate is welded and fixed above the fixed cylinder. The pressure rod is connected to the bottom end of the pressure rod. Fixed barrel sliding connection.

Furthermore, positioning posts are symmetrically welded and fixed on both ends of the top surface of the speaker holder, and a positioning groove is provided on the cover fixing plate corresponding to the positioning post, and the lower half of the positioning groove is shaped like a truncated cone.

Furthermore, the inner diameter of the positioning groove is the same as the diameter of the positioning post.

Furthermore, a detachable cover bearing plate is installed on the bottom surface of the cover fixing plate.

Furthermore, a U-shaped opening slot is provided in the middle of the cover carrying plate and the opening of the opening slot faces the cover fixing plate. A storage slot arranged symmetrically with respect to the opening slot is provided on the top surface of the cover carrying plate, and the storage slot is evenly spaced. There is a cover placement rack for placing the cover. The bottom surface of the cover placement rack is fixedly connected to the top of a vertical push rod. The bottom end of the push rod passes under the cover bearing plate and is respectively connected to the top surface of the push plate. Both ends are fixedly connected, and the push rod is slidingly connected to the cover bearing plate.

Furthermore, guide bars are fixed symmetrically on both ends of the top surface of the cover bearing plate, and an installation groove with the same shape as the guide bar is provided on the bottom surface of the cover fixing plate at a position corresponding to the guide bar. The installation groove faces the end of the cover fixing plate. The part is set as the positioning surface.

Furthermore, the ends of the guide bars extend out of the cover bearing plate.

Furthermore, the guide bar includes a guide bar body and a guide head. The part of the guide bar body that extends beyond the cover bearing plate is fixed with an integrally formed guide head, and the guide head is in the shape of a bullet.

Beneficial effects achieved by the present invention:

Since the face cover is assembled to the speaker through the assembly function of the speaker holder and the face cover fixing plate, the calibration work of the circumferential direction of the face cover is omitted, which is easy to use and greatly improves the assembly efficiency of the earphone speaker cover.

Description of the drawings

Figure 1 is a schematic structural diagram provided by the present invention.

FIG. 2 is a schematic structural diagram of a speaker holder provided in Embodiment 2 of the present invention.

Figure 3 is a cross-sectional view of the speaker holder provided by the present invention.

FIG. 4 is a schematic structural diagram of a cover fixing plate provided in Embodiment 2 of the present invention.

Figure 5 is a second structural schematic diagram of the cover fixing plate provided in the first embodiment of the present invention.

Figure 6 is a partial enlarged view of part A provided in Embodiment 1 of the present invention.

Figure 7 is a schematic structural diagram of the clamping block provided in the fourth embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a cover bearing plate provided in Embodiment 3 of the present invention.

Figure 9 is a top view of the cover carrier plate provided in Embodiment 3 of the present invention.

Figure 10 is a schematic structural diagram of the bottom of the cover bearing plate provided in Embodiment 3 of the present invention.

Figure 11 is a schematic structural diagram of a guide bar provided in Embodiment 3 of the present invention.

Figure 12 is a half-sectional view of the cover carrier plate provided in Embodiment 5 of the present invention.

As shown in the figure: base 1, speaker holder 2, support plate 3, cover bearing plate 4, cover fixing plate 5, top plate 6, hydraulic rod 7, connecting block 8, fixed cylinder 9, positioning column 10, guide groove 12. Horn groove 13, connecting pipe 14, first piston 15, pressure rod 16, pressure plate 17, second piston 18, mounting groove 19, chute 20, sliding plate 21, connecting plate 22, lifting plate 23, lifting rod 24 , lifting handle 25, lifting rod 26, positioning groove 27, first spring 28, limit block 29, positioning surface 30, groove 31, clamping block 32, rubber ball 321, slider 33, second spring 34, storage Slot 35, cover placement frame 36, opening slot 37, guide bar 38, guide bar body 381, guide head 382, push plate 39, push rod 40.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

In this technical solution, the speaker and the cover of the earphone are respectively fixed. The cover is assembled to the speaker through the assembly function of the speaker fixing seat and the cover fixing plate, thereby eliminating the need for fixing the circumferential direction of the cover. The calibration work is easy to use and greatly improves the assembly efficiency of the headphone speaker cover.

Embodiment 1

Please refer to Figure 1. An assembly device for a headphone speaker cover, including a speaker fixing base 2 for fixing the headphone speaker and a cover fixing plate 5 for fixing the headphone speaker cover. The speaker is fixed The seat 2 is fixedly installed on the top surface of the base 1 in an integrally formed manner. The two ends of the top surface of the base 1 are fixedly connected to the bottom end of a vertically installed support plate 3. The top end of the support plate 3 is respectively connected to the bottom surface of the top plate 6. Both ends are fixedly connected, and a cover fixing plate 5 is installed between the support plates 3 below the top plate 6. The top two ends of the cover fixing plate 5 are respectively fixedly connected to the bottom end of a vertically installed hydraulic rod 7. The top end of the hydraulic rod 7 is fixedly connected to the bottom surface of the top plate 6 , and connecting blocks 8 are symmetrically welded and fixed on both sides of the cover fixing plate 5 , and the connecting blocks 8 are slidingly connected to the support plate 3 .

Please refer to Figure 4, Figure 5 and Figure 6. A vertical lifting rod 24 is slidably installed in the middle of the cover fixing plate 5. The bottom end of the lifting rod 24 is welded and fixed with a limit block 29. The top surface of the limit block 29 It is fixedly connected with the bottom end of the first spring 28, and the top end of the first spring 28 is fixedly connected with the bottom surface of the cover fixing plate 5. The top end of the lifting rod 24 is welded and fixed with a lifting handle 25. The lifting handle 25 facilitates the lifting of the lifting rod 24. In operation, the part of the lifting rod 24 located above the cover fixing plate 5 is welded and fixed with a horizontal lifting plate 23. The two ends of the bottom surface of the lifting plate 23 are fixedly connected to the top of a vertically installed lifting rod 26. The bottom of the lifting rod 26 The ends are respectively hinged with the bottom end of a connecting plate 22, the top end of the connecting plate 22 is hinged with the top end of a vertically installed sliding plate 21, and the bottom surface of the cover fixed plate 5 is provided with a groove symmetrically arranged with respect to the lifting rod 24 31. Two slide blocks 33 are slidably installed in the groove 31. The opposite sides of the slide blocks 33 are respectively fixedly connected to one end of a second spring 34, and the other end of the second spring 34 is fixedly connected to a clamping block 32. The opposite side of the clamping block 32 forms a cavity with the same shape as the face cover, so that the face cover can be clamped and fixed. At the same time, the cavity formed by the joining of the clamping blocks 32 positions the face cover in the circumferential direction. The design of the two springs 34 can prevent the clamping block 32 from deforming the cover due to excessive clamping force. At the same time, the clamping block 32 can tightly clamp the cover, and the top surface of the slider 33 is vertically aligned with the surface cover. The bottom end of the installed sliding plate 21 is fixedly connected, and the cover fixed plate 5 is provided with a chute 20 for the sliding plate 21 to slide.

When clamping the opposite cover, lift the lifting rod 24 through the lifting handle 25. The lifting rod 24 drives the lifting plate 23 to rise, and the lifting plate 23 drives the lifting rod 26 to rise. The lifting rod 26 is connected to the sliding plate 21 through the connecting plate 22. The sliding plate 21 is pushed open, and the sliding plate 21 drives the sliding block 33 to slide, thereby driving the clamping blocks 32 to separate. At this time, it is convenient to place the cover between the clamping blocks 32 for clamping and fixing.

It is further limited that the stroke of the slider 33 is greater than the overall length of the second spring 34 .

Please refer to Figures 2 and 3. A vertical guide groove 12 is provided in the middle of the speaker holder 2 corresponding to the position of the limiting block 29. A speaker groove symmetrically arranged with respect to the guide groove 12 is provided on the top surface of the speaker holder 2. 13. The shape and position of the speaker groove 13 corresponds to the cavity formed by the clamping block 32, thereby facilitating the circumferential positioning of the headphone speaker, and thereby facilitating the assembly between the face cover and the headphone speaker. A third guide groove 12 is slidably installed. Two pistons 18, and the bottom of the guide groove 12 is fixedly connected to one end of the connecting pipe 14, and the other end of the connecting pipe 14 is fixedly connected to the bottom end of the vertically installed fixed cylinder 9. The fixed cylinder 9 is fixedly installed on the On the top surface of the base 1, a first piston 15 is slidably installed in the fixed cylinder 9. The first piston 15 is fixedly connected to the bottom end of the pressure rod 16. The top of the pressure rod 16 extends out of the fixed cylinder 9, and a pressure plate 17 is welded and fixed above the fixed cylinder 9. The rod 16 is slidingly connected to the fixed cylinder 9 .

It should be noted that the part between the first piston 15 and the second piston 18 is filled with hydraulic oil. When the cover fixing plate 5 is closed on the horn fixing base 2, during the assembly process of the cover, the limit block 29 first comes with the The second piston 18 contacts, and through the damping effect of the second piston 18, the lifting rod 24 can be lifted up, and then through the transmission effect of the lifting plate 23 and the lifting rod 26 and other components, the slide block 33 drives the clamping block 32 to separate, and the After the cover is loosened and the assembly of the cover is completed, the cover fixing plate 5 is lifted, which can prevent the clamping block 32 from lifting the cover. After the cover fixing plate 5 is lifted, the first piston 15 is in the fixed cylinder 9 Under the action of the air pressure inside, the second piston 18 will be pushed back to its original position, and through the design of the pressure rod 16 and the pressure plate 17, when gas leakage occurs in the fixed cylinder 9, it can also be manually operated by workers to ensure that the second piston 18 normal work.

In actual use, the headphone speaker is fixed on the speaker holder 2, and the speaker cover is fixed on the bottom of the cover fixing plate 5. The expansion and contraction of the hydraulic rod 7 drives the cover fixing plate 5 to rise and fall. When the cover fixing plate When 5 is closed on the speaker holder 2, the work of assembling the face cover to the headphone speaker is completed, eliminating the need for staff to calibrate the face cover and the headphone speaker circumferentially, which greatly improves the assembly efficiency of the headphone speaker face cover.

Embodiment 2

Please refer to Figures 2 and 4. In the embodiment of the present invention, positioning posts 10 are symmetrically welded and fixed at both ends of the top surface of the speaker holder 2, and the cover fixing plate 5 is provided with positioning grooves 27 corresponding to the positions of the positioning posts 10. , the lower half of the positioning groove 27 is set in a truncated cone shape, and through such a design, it plays a guiding role in guiding the positioning post 10 into the positioning groove 27 .

It is further limited that the inner diameter of the positioning groove 27 is the same as the diameter of the positioning post 10. Through the structural design of the positioning post 10 and the positioning groove 27, the assembly accuracy between the speaker fixing base 2 and the cover fixing plate 5 can be improved, thereby ensuring The cover can be accurately assembled to the speaker of the headset.

Embodiment 3

Please refer to Figure 1. In the embodiment of the present invention, a detachable face cover bearing plate 4 is installed on the bottom surface of the face cover fixing plate 5. By placing the face cover on the face cover bearing plate 4, it is convenient for workers to pass through the face cover. The cover carrier plate 4 installs the cover between the clamping blocks 32 at the bottom of the cover fixing plate 5 .

Please refer to Figures 1 and 9. A U-shaped opening slot 37 is provided in the middle of the cover carrying plate 4 and the opening of the opening slot 37 faces the cover fixing plate 5. There is an opening on the top surface of the cover carrying plate 4. The storage slots 35 are symmetrically arranged in the slots 37. The storage slots 35 are provided with face cover placement racks 36 for placing the face covers. The bottom surfaces of the cover placement racks 36 are respectively fixedly connected to the top ends of a vertical push rod 40. The push rods The bottom end of 40 passes through the bottom of the cover bearing plate 4 and is fixedly connected to the two ends of the top surface of the push plate 39 respectively. The push rod 40 is slidingly connected with the cover bearing plate 4 .

It should be noted that when the cover carrying plate 4 is assembled to the bottom surface of the cover fixing plate 5, the cover placing frame 36 enters the storage groove 35, thereby not affecting the connection between the cover carrying plate 4 and the cover fixing plate 5. assembly.

Please refer to Figures 1, 8, 9 and 10. Guide bars 38 are fixed symmetrically on both ends of the top surface of the cover bearing plate 4, and guide bars 38 are provided on the bottom surface of the cover fixing plate 5 at positions corresponding to the guide bars 38. 38 has the same installation groove 19 with the same shape. The end of the installation groove 19 facing the inner cover fixing plate 5 is set as the positioning surface 30. When the end of the guide bar 38 abuts the positioning surface 30, the cover placement frame 36 is just in the clip. Just below the holding block 32, at this time, push the face cover placing frame 36 upward through the push plate 39, and the face cover can be clamped and fixed by the clamping block 32. The operation is simple and convenient, improves the work efficiency of the staff, and reduces the cost. Difficulty of the staff's work.

It is further limited that the end of the guide bar 38 extends out of the cover bearing plate 4 to facilitate the guide bar 38 to locate the installation groove 19 , thereby facilitating the assembly of the cover bearing plate 4 to the bottom of the cover fixing plate 5 .

Please refer to Figure 11. The guide bar 38 includes a guide bar body 381 and a guide head 382. The part of the guide bar body 381 extending out of the cover bearing plate 4 is fixed with an integrally formed guide head 382. The guide head 382 is in the shape of a bullet, so that When the guide bar 38 enters the installation groove 19, the assembly difficulty between the cover carrying plate 4 and the cover fixing plate 5 can be further reduced.

Embodiment 4

Please refer to Figure 7. In the fourth embodiment, other structures remain unchanged and another structural form of the clamping block 32 is provided. A rubber ball 321 is embedded and fixed on the opposite side of the clamping block 32. When the holding block 32 clamps the face cover, the rubber ball 321 forms point contact with the face cover, thereby effectively improving the clamping and fixing effect of the face cover, and due to the slight deformation ability of the rubber ball 321, when the face cover is processed due to Even if there is a slight difference in appearance, it can also achieve stable clamping of the opposite cover.

Embodiment 5

Please refer to Figure 12. In the fifth embodiment, other structures remain unchanged, and another structural form of the cover bearing plate 4 is provided to solve the problem that when the cover 11 is installed on the cover placement frame 36, due to the cover 11 itself Due to irregular shapes, uneven distribution of different materials, etc., the lower cover 11 is prone to deflection under the influence of gravity, which affects the installation accuracy of the cover; the balance plate 41 is slidably mounted on the push rod 40, and the balance plate 41 is embedded in the storage slot. 35, at the lower end of the cover placement frame 36, the balance adjustment rod 42 passes through the push plate 39 and the through hole on the cover bearing plate 4 and is connected and fixed with the balance plate 41. The balance adjustment rod 42 is threadedly connected to the push plate 39, and the balance adjustment The rod 42 is slidingly linked to the cover bearing plate 4, and the balance plate 41 is raised and lowered by adjusting the balance adjustment rod 42, thereby changing the distance between the balance plate 41 and the cover placement frame 36;

When the face cover 11 is installed on the cover placement frame 36, the balance adjustment rod 42 is rotated to make the balance plate 41 rise and fall along the push rod 40. When the upper surface of the balance plate 41 is in close contact with the lower surface of the face cover 11, the rotation is stopped. Push the face cover carrying plate 4 to just below the clamping block 32, push the face cover placement frame 36 upward through the push plate 39, and the upper surface of the balance plate 41 and the lower surface of the face cover 11 are always in close contact to avoid the face cover 11 deflection, and finally the face cover is clamped and fixed by the clamping block 32. Since the balance plate 41 can adjust the height according to the shape of the face cover 11, the upper surface of the balance plate 41 closely fits the lower surface of the face cover 11, so The face cover placing frame 36 can stably carry various face covers 11 and improve the installation accuracy of the face cover.

The upper edge ring of the face cover placement frame 36 is provided with a rough friction block 43. When the face cover 11 is installed on the face cover placement frame 36, the friction between the face cover placement frame 36 and the inner wall of the face cover 11 is increased and the friction of the face cover 11 is weakened. slide.

It should be noted that during implementation, the present invention has the following advantages:

1: Since the face cover is assembled to the speaker through the assembly of the speaker holder and the face cover fixing plate, the circumferential calibration of the face cover is omitted. It is easy to use and greatly improves the assembly of the headphone speaker cover. efficiency.

2: Due to the structural design of the speaker holder 2, after the assembly of the speaker and the cover is completed, the lifting rod 24 can be lifted up, so that the slider 33 drives the clamping block 32 to separate, and the cover is loosened. Lifting the cover fixing plate 5 can prevent the clamping block 32 from lifting the cover, thus ensuring smooth operation of the cover equipment.

Three: Since the positioning post 10 is provided on the speaker holder 2, and the positioning groove 27 is provided on the cover fixing plate 5, through the structural design of the positioning post 10 and the positioning groove 27, the speaker holder 2 and the cover fixing plate can be improved The assembly accuracy is between 5, thus ensuring that the cover can be accurately assembled to the speaker of the headset.

Four: Because the design of the face cover bearing plate 4 makes it easy to install the face cover to the bottom of the face cover fixing plate 5, it reduces the difficulty of the staff in assembling the face cover.

The working principle of the present invention is:

First, place the face cover on the face cover placement frame 36, and then install the face cover bearing plate 4 to the bottom of the face cover fixing plate 5 through the action of the guide bar 38, and according to the design of the positioning surface 30, the face cover placement frame 36 is located directly below the clamping block 32. At this time, the lifting rod 24 is lifted upward. Through the transmission function of the lifting plate 23, the lifting rod 26, the connecting plate 22 and the sliding plate 21, the clamping block 32 is opened and pushed. The plate 39 sends the cover between the clamping blocks 32, and then releases the lifting rod 24. Under the action of the first spring 28, the clamping block 32 clamps and fixes the cover, and then releases the push plate 39 and Pull out the cover bearing plate 4, and finally drive the hydraulic rod 7 to close the cover fixing plate 5 on the speaker holder 2 to complete the assembly of the cover and the headphone speaker.

In addition, when lifting the cover fixing plate 5, the pressure plate 17 needs to be pressed down, and the lifting rod 24 is pushed up by the second piston 18, so that the clamping block 32 releases the cover.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (8)

1. An assembly device for a headphone speaker cover, including a speaker holder (2) for fixing the headphone speaker and a cover fixing plate (5) for fixing the headphone speaker cover. The speaker The fixed seat (2) is fixedly installed on the top surface of the base (1) through one-piece molding. Both ends of the top surface of the base (1) are fixedly connected to the bottom end of a vertically installed support plate (3). The support plate The tops of (3) are fixedly connected to both ends of the bottom of the top plate (6). A cover fixing plate (5) is installed below the top plate (6) between the support plates (3). The cover fixing plate (5) Both ends of the top surface are fixedly connected to the bottom end of a vertically installed hydraulic rod (7), the top end of the hydraulic rod (7) is fixedly connected to the bottom surface of the top plate (6), and both sides of the cover fixed plate (5) The connecting block (8) is symmetrically welded and fixed, and the connecting block (8) is slidingly connected to the support plate (3); A vertical lifting rod (24) is slidably installed in the middle of the cover fixing plate (5). The bottom end of the lifting rod (24) is welded to a limiting block (29), and the top surface of the limiting block (29) is connected to The bottom end of the first spring (28) is fixedly connected, the top end of the first spring (28) is fixedly connected with the bottom surface of the cover fixing plate (5), the top end of the lifting rod (24) is welded and fixed with a lifting handle (25), and the lifting handle (25) is welded and fixed. The part of the rod (24) located above the cover fixing plate (5) is welded and fixed with a horizontal lifting plate (23). Both ends of the bottom surface of the lifting plate (23) are respectively fixed with the top of a vertically installed lifting rod (26). connection, the bottom end of the lifting rod (26) is hinged with the bottom end of a connecting plate (22), the top end of the connecting plate (22) is hinged with the top end of a vertically installed sliding plate (21), and the cover is fixed The bottom surface of the plate (5) is provided with a groove (31) symmetrically arranged with respect to the lifting rod (24). Two slide blocks (33) are slidably installed in the groove (31). The opposite sides of the slide block (33) are respectively One end of the second spring (34) is fixedly connected, and the other end of the second spring (34) is fixedly connected to a clamping block (32). The opposite side of the clamping block (32) forms a ring with the same shape as the cover. In the cavity, the top surface of the slider (33) is fixedly connected to the bottom end of the vertically installed sliding plate (21), and the cover fixed plate (5) is provided with a chute (20) for the sliding plate (21) to slide. ; The middle part of the speaker holder (2) is provided with a vertical guide groove (12) corresponding to the position of the limiting block (29), and the top surface of the speaker holder (2) is provided with a symmetrical guide groove (12). The shape and position of the horn groove (13) correspond to the cavity formed by the clamping block (32). The second piston (18) is slidably installed in the guide groove (12), and the guide groove (12) The bottom is fixedly connected to one end of the connecting tube (14), and the other end of the connecting tube (14) is fixedly connected to the bottom end of the vertically installed fixed tube (9). The fixed tube (9) is fixedly installed on the base through one-piece molding. On the top surface of (1), a first piston (15) is slidably installed in the fixed cylinder (9). The first piston (15) is fixedly connected to the bottom end of the pressure rod (16), and the top end of the pressure rod (16) extends out. A pressure plate (17) is welded and fixed above the fixed cylinder (9), and the pressure rod (16) is slidingly connected to the fixed cylinder (9). 2. An assembly device for an earphone speaker cover according to claim 1, characterized in that positioning posts (10) are symmetrically welded and fixed at both ends of the top surface of the speaker holder (2), and the cover fixing plate is A positioning groove (27) is provided on (5) at a position corresponding to the positioning post (10), and the lower half of the positioning groove (27) is set in a truncated cone shape. 3. An assembly device for an earphone speaker cover according to claim 2, characterized in that the inner diameter of the positioning groove (27) is the same as the diameter of the positioning post (10). 4. An assembly device for an earphone speaker cover according to claim 3, characterized in that a detachable cover bearing plate (4) is installed on the bottom surface of the cover fixing plate (5). 5. An assembly device for an earphone speaker cover according to claim 4, characterized in that a U-shaped opening groove (37) is provided in the middle of the cover bearing plate (4) and the opening groove (37) The opening faces the cover fixing plate (5), and the top surface of the cover bearing plate (4) is provided with a storage slot (35) symmetrically arranged with respect to the opening slot (37). The cover placement frame (36) of the cover is fixedly connected to the top of a vertical push rod (40) at its bottom. The bottom end of the push rod (40) passes through the cover bearing plate (36). 4) The lower part is fixedly connected to both ends of the top surface of the push plate (39), and the push rod (40) is slidingly connected to the cover bearing plate (4). 6. An assembly device for an earphone speaker cover according to claim 5, characterized in that guide bars (38) are symmetrically fixed at both ends of the top surface of the cover carrying plate (4), and the cover fixing plate (5) The bottom surface has a mounting groove (19) with the same shape as the guide bar (38) at the position corresponding to the guide bar (38). The end of the mounting groove (19) facing the cover fixing plate (5) is set as the positioning surface. (30). 7. An assembly device for an earphone speaker cover according to claim 6, characterized in that the end of the guide bar (38) extends out of the cover bearing plate (4). 8. An assembly device for an earphone speaker cover according to claim 7, characterized in that the guide bar (38) includes a guide bar body (381) and a guide head (382), and the guide bar body (381) An integrally formed guide head (382) is fixed to the part extending out of the cover bearing plate (4), and the guide head (382) is in the shape of a bullet.