Earphone pressure maintaining device

Abstract

The utility model relates to the field of earphone production devices, in particular to an earphone pressure maintaining device which comprises a bottom plate, a plurality of fixing devices are fixed on the bottom plate, each fixing device comprises a lower die fixed on the bottom plate, a positioning groove is formed in each lower die, and each fixing device further comprises an upper die. A top plate is further arranged above the bottom plate, an air cylinder is fixed to the top plate, a mounting plate is fixed to the tail end of a piston rod of the air cylinder, and pressure maintaining structures are arranged at the positions, corresponding to the fixing devices, of the mounting plate. The pressure maintaining structure comprises a pressing plate arranged below the mounting plate, a pressing block is fixed to the pressing plate, a plurality of sliding rods are further fixed to the pressing plate, the sliding rods penetrate through the mounting plate and are in sliding connection with the mounting plate, and threaded pipes are fixed to the positions, above the pressing plate, of the mounting plate. According to the device, the pressure maintaining force during pressure maintaining can be adjusted, and it can be guaranteed that an adhesive-dispensed earphone is pressed.

Description

Technical Field

[0001] The present invention relates to the field of earphone production devices, and in particular to an earphone pressure maintaining device. Background Art

[0002] At present, various types of headphones are gradually becoming popular in people's lives, bringing great convenience to people's lives, such as Knight headphones. In related technologies, during the manufacturing process of headphones, after some parts of the headphones (such as the front shell and back shell of the headphones) are connected and assembled, they need to be reinforced by dispensing glue (such as AB glue or hot melt glue) to prevent these parts from loosening. When dispensing glue, the headphones are first placed in the headphone module, and then the headphone module is placed in the headphone pressure-maintaining mechanism, and then the headphone pressure-maintaining mechanism is used to apply pressure to the headphones to solidify the glue. Patent application number: CN202022749899.0 discloses a headphone dispensing and pressure-maintaining fixture, including a pressure-maintaining shell, an upper die, and a lower die. The bottom surface of the upper die is similar to the top surface structure of the lower die so that they can be pressed against each other. After the upper die and the lower die are pressed against each other, a cavity is formed for the product to be placed. The upper and lower shells of the headphone shell are stacked by the upper die and the lower die. The inserted upper die and the lower die are placed in the pressure-maintaining shell to perform pressure-maintaining operation on the headphone. However, this type of pressure-maintaining fixture cannot adjust the pressure during pressure maintenance. After the mold has been used for a period of time, the mold wears and the gap increases, which can easily lead to insufficient holding pressure, resulting in a gap between the front shell and the back shell of the fixture, and the product to be glued cannot be pressed tightly, which in turn leads to poor bonding between the front shell and the back shell.

[0003] The present invention is proposed in view of the deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an earphone pressure maintaining device.

[0005] The present invention can be achieved through the following technical solutions:

[0006] The top of the pedal down is equipped with a plurality of pedals, and the bottom of the pedal down is equipped with a plurality of pedals, and the pedal down is equipped with a plurality of pedals. Place the earphones to be pressure-maintained after dispensing in the positioning groove of the lower mold, and cover the upper mold on the lower mold. The limit groove and the positioning groove form a accommodating cavity for placing the earphones. After the upper mold covers the lower mold, the cylinder is started, the piston rod on the cylinder extends, the mounting plate descends, and the mounting plate pushes the pressure block down through the limit plate. The pressure block is pushed by the spring and pressed on the upper mold to achieve pressure maintenance of the earphones. When the pressure maintenance needs to be adjusted, the screw is rotated. Since the screw is threadedly connected to the threaded tube, when the screw rotates, the screw moves in the direction of the threaded tube. The limit plate moves with the screw, thereby adjusting the distance between the limit plate and the mounting plate. After the pressure block is pressed on the upper mold, since the distance between the pressure block and the mounting plate is equal to that before adjustment, adjusting the distance between the mounting plate and the limit plate is adjusting the distance between the limit plate and the pressure plate, that is, adjusting the size of the pressing spring during pressure holding, that is, adjusting the deformation of the pressing spring during pressure holding, thereby adjusting the pressure provided to the pressure plate by the pressing spring, and realizing the pressure holding during pressure holding. This device can realize the pressure holding during pressure holding, and can ensure that the earphones being glued are pressed tightly.

[0007] Preferably, positioning rods are symmetrically fixed to the bottom plates on both sides of the lower mold, and positioning tubes are provided on the positioning rods for sliding connection with the positioning rods. A positioning shaft is provided between the two positioning tubes, and a support tube is provided on the positioning shaft for rotationally connection with the positioning shaft. The upper mold is fixed to the support tubes, and positioning springs are provided on the positioning rods below the positioning tubes. The upper mold is set on the side of the lower mold. When pressing, the upper mold is flipped over the lower mold and pressed downward.

[0008] Preferably, a plurality of positioning posts are fixed on the lower die, and positioning holes are provided on the upper die at positions corresponding to the positioning posts. The upper die and the lower die are positioned by inserting the positioning posts into the positioning holes.

[0009] Preferably, magnets are fixed at corresponding positions on the lower mold and the upper mold. After the upper mold covers the lower mold, the magnets attract each other to fix the upper mold on the lower mold, thereby preventing the upper mold from shifting before pressing.

[0010] Preferably, a limiting block is fixed on the top of each sliding rod.

[0011] Preferably, the pressure plates are all fixed with a limiting rod, one end of which is arranged in the screw and slidably connected to the screw, and the limiting rod passes through the compression spring to prevent the compression spring from falling off.

[0012] Compared with the existing technology, the present invention has the following advantages:

[0013] The device can adjust the holding pressure during pressure maintenance, and can ensure that the earphone being glued is pressed tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] In the figure: 1. bottom plate; 2. fixing device; 3. lower die; 4. positioning groove; 5. upper die; 6. limiting groove; 7. positioning column; 8. positioning hole; 9. positioning rod; 10. positioning tube; 11. positioning shaft; 12. support tube; 13. positioning spring; 14. magnet; 15. top plate; 16. cylinder; 17. mounting plate; 18. pressure-maintaining structure; 19. pressing plate; 20. pressing block; 21. sliding rod; 22. limiting block; 23. threaded tube; 24. screw; 25. limiting plate; 26. pressing spring; 27. limiting rod; DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0019] Example 1:

[0020] like Figures 1 to 2As shown, this embodiment discloses an earphone pressure-maintaining device, comprising a bottom plate 1, on which a plurality of fixing devices 2 are fixed, the fixing device 2 comprising a lower die 3 fixed to the bottom plate 1, the lower die 3 being provided with a positioning groove 4, the fixing device 2 further comprising an upper die 5, the upper die 5 being provided with a limiting groove 6 for use with the positioning groove 4, a top plate 15 being further provided above the bottom plate 1, a cylinder 16 being fixed on the top plate 15, a mounting plate 17 being fixed to the end of the piston rod of the cylinder 16, and a mounting plate 17 being provided on the mounting plate 17 at positions corresponding to the fixing devices 2. There is a pressure maintaining structure 18, which includes a pressure plate 19 arranged below the mounting plate 17, a pressure block 20 is fixed on the pressure plate 19, and a plurality of sliding rods 21 are fixed on the pressure plate 19, the sliding rods 21 pass through the mounting plate 17 and are slidably connected to the mounting plate 17, and a threaded tube 23 is fixed on the mounting plate 17 above the pressure plate 19, and a screw 24 threadedly connected to the threaded tube 23 is provided on the threaded tube 23, and a limiting plate 25 is fixed to the bottom of the screw 24, and a compression spring 26 is provided between the limiting plate 25 and the pressure plate 19. Place the earphones to be pressure-maintained after dispensing in the positioning groove 4 of the lower mold 3, cover the upper mold 5 on the lower mold 3, and the limiting groove 6 and the positioning groove 4 form a accommodating chamber for placing the earphones. After the upper mold 5 covers the lower mold 3, the cylinder 16 is started, the piston rod on the cylinder 16 extends, the mounting plate 17 descends, and the mounting plate 17 pushes the pressure block 20 down through the limiting plate 25. The pressure block 20 is pushed by the spring to press the pressure block 20 on the upper mold 5 to achieve the pressure-maintaining operation of the earphone. When the pressure holding pressure needs to be adjusted, the screw 24 is rotated. Since the screw 24 is threadedly connected to the threaded tube 23, when the screw 24 rotates, the screw 24 moves in the direction of the threaded tube 23. The limit plate 25 moves upward, and the limit plate 25 moves with the screw 24, thereby adjusting the distance between the limit plate 25 and the mounting plate 17. After the pressure block 20 is pressed on the upper mold 5, since the distance between the pressure block 20 and the mounting plate 17 is equal to that before adjustment, the distance between the mounting plate 17 and the limit plate 25 is adjusted, that is, the distance between the limit plate 25 and the pressure plate 19 is adjusted, that is, the size of the pressing spring 26 during pressure holding is adjusted, that is, the deformation of the pressing spring 26 during pressure holding is adjusted, thereby adjusting the pressure provided to the pressure plate 19 by the pressing spring 26, and realizing the pressure holding during pressure holding. This device can realize the pressure holding during pressure holding, and can ensure that the glued earphones are pressed tightly.

[0021] Among them, positioning rods 9 are symmetrically fixed to the bottom plate 1 on both sides of the lower mold 3. Positioning tubes 10 are provided on the positioning rods 9 and are slidably connected to the positioning rods 9. A positioning shaft 11 is provided between the two positioning tubes 10. A support tube 12 is provided on the positioning shaft 11 and is rotatably connected to the positioning shaft 11. The upper mold 5 is fixed on the support tube 12, and a positioning spring 13 is also provided on the positioning rods 9 below the positioning tube 10. The upper mold 5 is set on one side of the lower mold 3. When pressing, the upper mold 5 is flipped over the lower mold 3 and pressed downward.

[0022] Among them, a plurality of positioning columns 7 are fixed on the lower mold 3, and positioning holes 8 are provided on the upper mold 5 at positions corresponding to the positioning columns 7. The upper mold 5 and the lower mold 3 are positioned by inserting the positioning columns 7 into the positioning holes 8.

[0023] Among them, magnets 14 are fixed to corresponding positions on the lower mold 3 and the upper mold 5. After the upper mold 5 covers the lower mold 3, the magnets 14 attract each other to achieve the upper mold 5 fixed on the lower mold 3, avoiding the displacement of the upper mold 5 before pressing.

[0024] A limiting block 22 is fixed on the top of each sliding rod 21 .

[0025] Example 2:

[0026] This embodiment discloses an earphone pressure-maintaining device. Based on the structure and principle of the first embodiment, a limit rod 27 is fixed to the pressure plate 19 of this embodiment. One end of the limit rod 27 is disposed within and slidably connected to the screw 24. The limit rod 27 passes through a compression spring 26. The limit rod 27 passing through the compression spring 26 prevents the compression spring 26 from falling off.

[0027] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, replacements and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, replacements and variations should also be regarded as the scope of protection of the present invention.

Claims

1. An earphone pressure-maintaining device, comprising a bottom plate, characterized in that: The top of the piston rod is fixed with a button bar, and the bottom of the piston rod is fixed with a button bar, and the bottom of the piston rod is fixed with a button bar.

2. The earphone pressure-maintaining device according to claim 1, wherein: Positioning rods are symmetrically fixed on the bottom plates on both sides of the lower mold, and positioning tubes are provided on the positioning rods for sliding connection with the positioning rods. A positioning shaft is provided between the two positioning tubes, and a support tube is provided on the positioning shaft for rotationally connection with the positioning shaft. The upper mold is fixed on the support tube, and a positioning spring is also provided on the positioning rod below the positioning tube.

3. The earphone pressure maintaining device according to claim 1, wherein: A plurality of positioning columns are fixed on the lower die, and positioning holes are provided on the upper die at positions corresponding to the positioning columns.

4. The earphone pressure maintaining device according to claim 1, wherein: Magnets are fixed at corresponding positions on the lower die and the upper die.

5. The earphone pressure maintaining device according to claim 1, wherein: The tops of the slide bars are all fixed with limiting blocks.

6. The earphone pressure maintaining device according to claim 1, wherein: A limiting rod is fixed on each of the pressure plates. One end of the limiting rod is disposed in the screw rod and is slidably connected to the screw rod. The limiting rod passes through a compression spring.

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