Automatic production equipment for sofa headrest hinge

Abstract

The invention discloses automatic production equipment for sofa headrest hinges, and belongs to the field of hinge production, the automatic production equipment comprises a frame, the top of the frame is fixedly connected with a hydraulic cylinder, the bottom of the frame is fixedly connected with a bottom plate, and the end part of an output shaft of the hydraulic cylinder penetrates through the top plate of the frame and extends into the frame. After the lifting plate is upwarped, a plate placed on the surface of the plate bottom plate moves towards the rear side of the frame under the action of the lifting plate, the plate can conveniently reach the position of a machining tool at the bottom of the pressing plate, material placement is safer, after machining is finished, the pressing plate drives the tool to move upwards, and when the pressing plate passes through the driving block, the driving block is extruded again to move; at the moment, the driving block pulls the connecting rope again and drives the lifting plate to rotate, the lifting plate can rotate again conveniently, the surface of the lifting plate inclines conveniently, the plate machined on the surface of the lifting plate and the machined chippings move towards the rear side of the frame, and the machined chippings can be collected conveniently.

Description

Technical Field

[0001] The present invention relates to the field of hinge production, and more specifically, to an automatic production device for a sofa headrest hinge. Background Art

[0002] A hinge is a mechanical device used to connect two solids and allow relative rotation between them. Usually, hinges are used in the assembly of furniture, and the sofa headrests are connected by hinges. The production of hinges generally includes steps such as material selection, stamping, bending, drilling, assembly, surface treatment, quality inspection, and packaging. The materials are generally steel, stainless steel, or aluminum alloy, and different materials affect the strength and corrosion resistance of the hinges. In stamping, two pieces of the hinge (the door leaf and the frame leaf) may be stamped out using a mold, and then bent to form the bushing part. Then, drilling is carried out to install screws. In the assembly part, an axle center, such as a steel axle or a nylon axle, may need to be inserted to ensure smooth rotation. Surface treatment such as electroplating or painting is for rust prevention and aesthetics.

[0003] Chinese Patent with Publication No. CN118664337A discloses a stamping die for a hanger hinge. When processing the hinge seat, first, the metal plate is placed on the first carrier table, then the metal plate is pushed below the first stamping part, and then the upper die slides. The upper die slides towards the lower die, driving the first stamping part to slide towards the first stamping groove to stamp out the outer contour of the hinge seat on the metal plate. Then, the metal plate is pushed below the external drill rod, and the upper die drives the external drill rod to drill holes in the metal plate. Then, the metal plate is pushed below the internal drill rod to drill holes in the metal plate. Then, the metal plate is pushed below the first stamping part, and the first stamping part cuts off the metal plate. Then, the metal plate is pushed to drive the cut metal plate onto the bending part, and after the bending plate presses down, the metal plate is bent and formed. In the above process, steps such as the bending, stamping, hole punching, and contour stamping of adjacent hinge seats are carried out synchronously, thereby improving the processing efficiency of the hinge seat.

[0004] In the above patent, steps such as the bending, stamping, hole punching, and contour stamping of adjacent hinge seats are carried out synchronously, thereby improving the processing efficiency of the hinge seat. However, when feeding the material, workers still need to place the material under the device, and there are safety hazards for the workers during feeding. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an automatic production device for sofa headrest hinges. After the lifting plate tilts up, the plate placed on the surface of the plate bottom moves towards the rear side of the frame under the action of the lifting plate, facilitating the plate to reach the processing tool at the bottom of the pressing plate. Placing materials is safer. After processing, the pressing plate moves upward with the tool. When the pressing plate passes through the driving block, the driving block is squeezed again and moves. At this time, the driving block pulls the connecting rope again and drives the lifting plate to rotate, facilitating the lifting plate to rotate again. The surface of the lifting plate is inclined, causing the processed plate and processed debris on the surface of the lifting plate to move towards the rear side of the frame, facilitating the collection of the processed debris.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] An automatic production device for sofa headrest hinges includes a frame. A hydraulic cylinder is fixedly connected to the top of the frame. A bottom plate is fixedly connected to the bottom of the frame. The end of the output shaft of the hydraulic cylinder penetrates through the top plate of the frame and extends into the interior of the frame. The end of the output shaft of the hydraulic cylinder is fixedly connected to a pressing plate. A guiding mechanism is arranged inside the frame; The guiding mechanism includes a driving block slidably connected to the left side wall of the frame. A connecting rope is fixedly connected to the bottom left side of the driving block. The side of the connecting rope away from the driving block is provided with a lifting plate rotatably connected to the bottom plate. The lifting plate and the top of the bottom plate are at the same horizontal plane. A third spring is welded inside the driving block.

[0008] Further, an outer column is fixedly connected to the rear side of the pressing plate. A limiting mechanism is arranged at the rear side of the bottom plate. The limiting mechanism includes a baffle fixedly connected to the bottom plate. A clamping plate is slidably connected to the front side of the baffle. The outer column and the clamping plate are in the same vertical plane.

[0009] Further, an inner column is slidably connected inside the outer column. A trapezoidal block is slidably connected inside the outer column. One end of the trapezoidal block close to the inner column penetrates through the outer column and extends into the interior of the inner column.

[0010] Further, a second spring is welded inside the trapezoidal block. The second spring changes from the natural extension state to the taut state during the process of the trapezoidal block separating from the inner column.

[0011] Further, sixth springs are welded inside both sides of the front end of the clamping plate. The clamping plate extends into the interior of the baffle and is fixed to the sixth spring. The sixth spring changes from the natural extension state to the taut state during the process of the clamping plate squeezing the sixth spring. The middle of the baffle is hollowed out and a plurality of cylinders are fixedly connected at the hollowed-out part.

[0012] Further, a bending mechanism is provided on the front side of the bottom plate. The bending mechanism includes a mounting plate slidably connected to the surface of the bottom plate. The rear side of the mounting plate extends backward to form an extension plate. A pressing column is fixedly connected to the front side of the pressing plate.

[0013] Further, a right trapezoidal groove is provided inside the extension plate corresponding to the position of the pressing column. A plurality of bending blocks are slidably connected inside the mounting plate.

[0014] Further, limiting blocks extend upward on both sides of the top of the lifting plate. A fourth spring is fixedly connected inside the mounting plate.

[0015] Further, a lead screw is rotatably connected inside the mounting plate. The lead screw passes through the bending block. Two pressing plates are slidably connected to both sides inside the mounting plate. The pressing plates are in screw transmission connection with the lead screw.

[0016] Further, guide plates are slidably connected to the rear sides of both pressing plates. The distance between the opposite surfaces of the two guide plates is greater than the distance between the opposite surfaces of the two pressing plates. The cross-sectional shape of the guide plate is a right trapezoid. A fifth spring is welded inside the guide plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. After the lifting plate tilts up, the sheet placed on the surface of the bottom plate of the sheet moves backward toward the frame under the action of the lifting plate, facilitating the sheet to reach the processing tool at the bottom of the pressing plate. Placing the material is safer. After processing, the pressing plate moves upward with the tool. When the pressing plate passes through the driving block, the driving block is squeezed again and moves. At this time, the driving block pulls the connecting rope again and drives the lifting plate to rotate, facilitating the lifting plate to rotate again. The surface of the lifting plate is inclined, causing the processed sheet and the processed debris on the surface of the lifting plate to move backward toward the frame, facilitating the collection of the processed debris.

[0018] 2. In this solution, the outer column drives the inner column to move downward, causing the inner column to move toward the clamping plate, facilitating the inner column to squeeze the clamping plate and causing the clamping plate to move downward. Since the sheet is located below the clamping plate, it is convenient for the clamping plate to squeeze the sheet, making it more convenient to fix the sheet. There is no need for the staff to use a fixture to fix the sheet, and the clamping plate can always keep restricting the sheet. Moreover, the clamping plate can move, facilitating the fixation of sheets with different thicknesses, and the applicable range is wider. Due to the blocking of the cylinder, the sheet will not leave through the hollow of the baffle. After the lifting plate tilts up, the residues on the surface of the lifting plate can leave through the hollow of the baffle, realizing the separation between the sheet and the residues, and preventing the residues from remaining on the surface of the device, which may affect the accuracy during the operation of the device, thereby causing insufficient processing accuracy of the sheet material and generating defective products.

[0019] 3. In this solution, the mounting plate drives the bending block to move, causing the bending block to move towards the plate. The bending block presses on the plate, facilitating the bending of the plate, enabling the plate to be processed in multiple aspects simultaneously, saving the processing time of the plate. Multiple bending blocks are provided, and the number of bending blocks can be increased or decreased according to the required bending locations of the plate. The applicable range is wider, and the number and arrangement of the bending blocks can be adjusted according to the bending locations and the amount of bending of the plate, making the applicable range even wider.

[0020] 4. In this solution, the guide plate guides the plate, making it more convenient for the plate to slide to the position of the clamping plate. The distance between the opposite surfaces of the two guide plates is greater than the distance between the opposite surfaces of the two pressing plates, facilitating the existence of a gap between the guide plate and the sheet material, preventing the guide plate from affecting the downward sliding of the plate. The cross-sectional shape of the guide plate is a right trapezoid, and the inclined surface is at the bottom, making it convenient for the guide plate not to affect the lifting of the plate when the plate is lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the production equipment of the present invention; Figure 2 is a partial schematic diagram of the production equipment of the present invention; Figure 3 is a schematic structural diagram of the guiding mechanism of the present invention; Figure 4 is a schematic internal side view structure diagram of the frame of the present invention; Figure 5 is a schematic internal structure diagram of the outer column of the present invention; Figure 6 is a schematic structural diagram of the bending mechanism of the present invention; Figure 7 is a schematic connection diagram of the guide plate and the pressing plate of the present invention; Figure 8 is a schematic structural diagram of the limiting mechanism of the present invention.

[0022] Explanation of the reference numerals in the drawings: 1. Hydraulic cylinder; 11. Pressing plate; 12. Extrusion column; 13. Outer column; 131. Inner column; 132. First spring; 133. Second spring; 134. Trapezoidal block; 2. Frame; 3. Base plate; 4. Guiding mechanism; 41. Driving block; 42. Lifting plate; 421. Limiting block; 43. Connecting rope; 44. Third spring; 5. Bending mechanism; 51. Mounting plate; 511. Extension plate; 512. Right trapezoidal groove; 513. Fourth spring; 52. Lead screw; 53. Bending block; 54. Guide plate; 541. Fifth spring; 55. Pressing plate; 6. Limiting mechanism; 61. Baffle; 62. Clamping plate; 63. Sixth spring; 64. Cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 to 8 , an automatic production device for a sofa headrest hinge, including a frame 2. A hydraulic cylinder 1 is fixedly connected to the top of the frame 2. A bottom plate 3 is fixedly connected to the bottom of the frame 2. The end of the output shaft of the hydraulic cylinder 1 penetrates through the top plate of the frame 2 and extends into the interior of the frame 2. The end of the output shaft of the hydraulic cylinder 1 is fixedly connected to a pressing plate 11. By driving the pressing plate 11 to move inside the frame 2 through the hydraulic cylinder 1, a plate is placed on the surface of the bottom plate 3. A guiding mechanism 4 is arranged inside the frame 2. The guiding mechanism 4 includes a driving block 41 slidably connected to the left side wall of the frame 2. When the pressing plate 11 moves downward, the pressing plate 11 squeezes the driving block 41. The cross-sectional shape of the side of the driving block 41 close to the pressing plate 11 is an isosceles triangle, which facilitates the pressing of the driving block 41 during the movement of the pressing plate 11. After being squeezed, the driving block 41 moves in a direction away from the pressing plate 11, making the movement of the driving block 41 more convenient. A connecting rope 43 is fixedly connected to the bottom left side of the driving block 41. By moving the driving block 41, the connecting rope 43 can be pulled, causing the connecting rope 43 to displace. On the side of the connecting rope 43 away from the driving block 41, there is a lifting plate 42 rotatably connected to the bottom plate 3. When the connecting rope 43 is pulled, the connecting rope 43 can pull the lifting plate 42, causing the lifting plate 42 to receive an upward force. The lifting plate 42 is rotatably connected to the bottom plate 3, and the rotating shaft is located in the rear half of the lifting plate 42, facilitating the front side of the lifting plate 42 to tilt up. The top of the lifting plate 42 is at the same horizontal plane as the top of the bottom plate 3. After the lifting plate 42 tilts up, the plate placed on the surface of the plate bottom plate 3 can move towards the rear side of the frame 2 under the action of the lifting plate 42, facilitating the plate to reach the processing tool at the bottom of the pressing plate 11 and making the placement of materials safer. After the pressing plate 11 passes through the driving block 41, when the driving block 41 is no longer squeezed by the pressing plate 11, a third spring 44 is welded inside the driving block 41. During the movement of the driving block 41, the third spring 44 changes from its original natural stretched state to a taut state. After the pressing plate 11 leaves the driving block 41, the driving block 41 returns to its original position under the action of the third spring 44. The pressing plate 11 drives the tool to process the sheet material. After the processing is completed, the pressing plate 11 drives the tool to move upward. When the pressing plate 11 passes through the driving block 41, the driving block 41 is squeezed again and moves. At this time, the driving block 41 pulls the connecting rope 43 again and drives the lifting plate 42 to rotate, facilitating the lifting plate 42 to rotate again. The surface of the lifting plate 42 is inclined, causing the processed sheet material and processed debris on the surface of the lifting plate 42 to move towards the rear side of the frame 2, facilitating the collection of the processed debris.

[0025] such as Figures 1 to 8As shown, an outer column 13 is fixedly connected to the rear side of the pressing plate 11. During the downward movement of the pressing plate 11, the pressing plate 11 drives the outer column 13 to move downward. A limiting mechanism 6 is arranged at the rear side of the bottom plate 3. The limiting mechanism 6 includes a baffle 61 fixedly connected to the bottom plate 3. A clamping plate 62 is slidably connected to the front side of the baffle 61. The outer column 13 and the clamping plate 62 are in the same vertical plane. During the downward movement of the outer column 13, the outer column 13 can contact the clamping plate 62. An inner column 131 is slidably connected to the inside of the outer column 13. By driving the inner column 131 to move downward with the outer column 13, the inner column 131 moves towards the clamping plate 62, facilitating the inner column 131 to squeeze the clamping plate 62, causing the clamping plate 62 to move downward. And the plate is located below the clamping plate 62, facilitating the clamping plate 62 to squeeze the plate, making the fixation of the plate more convenient. It is not necessary for the staff to use a fixture to fix the plate. A trapezoidal block 134 is slidably connected to the inside of the outer column 13. One end of the trapezoidal block 134 close to the inner column 131 penetrates through the outer column 13 and extends into the inside of the inner column 131, facilitating the trapezoidal block 134 to fix the inner column 131, so that when the inner column 131 does not contact the clamping plate 62, the inner column 131 and the outer column 13 remain fixed. When the inner column 131 contacts the clamping plate 62, the clamping plate 62 is squeezed by the inner column 131 to fix the plate. When the clamping plate 62 is difficult to move, the outer column 13 continues to move downward, causing the side wall of the inner column 131 to squeeze the inclined surface of the trapezoidal block 134, causing the trapezoidal block 134 to move inside the outer column 13, facilitating the trapezoidal block 134 to leave the inside of the inner column 131, facilitating the separation between the outer column 13 and the inner column 131, enabling the outer column 13 to continue to move downward, while the inner column 131 remains stationary at this time, keeping the inner column 131 always squeezing the clamping plate 62. A first spring 132 is welded inside the outer column 13. During the downward movement of the outer column 13, the outer column 13 drives the first spring 132 to move downward. The inner column 131 squeezes the first spring 132, causing the first spring 132 to deform under the squeeze of the inner column 131. The first spring 132 always squeezes the inner column 131, causing the inner column 131 to always squeeze downward, so that the clamping plate 62 can always restrict the plate, and the clamping plate 62 can move, facilitating the fixation of plates with different thicknesses, and the applicable range is wider. The pressing plate 11 can also continue to drive the outer column 13 to move downward without affecting the plate processing. A second spring 133 is welded inside the trapezoidal block 134. During the process of the trapezoidal block 134 detaching from the inner column 131, the trapezoidal block 134 and the outer column 13 squeeze the second spring 133, causing the second spring 133 to change from the natural extension state to the tense state, facilitating the subsequent power for the trapezoidal block 134 to be stuck into the inner column 131 again. And the first spring 132 can make it more convenient for the inner column 131 to return to the inside of the outer column 13 during the upward movement of the outer column 13, enabling the device to repeatedly fix the plate. Sixth springs 63 are welded inside both sides of the front end of the clamping plate 62. The clamping plate 62 extends into the inside of the baffle 61 and is fixed to the sixth springs 63.During the downward movement of the convenient splint 62, the splint 62 squeezes the sixth spring 63, causing the sixth spring 63 to change from the natural extension state to the tense state. After the splint 62 is no longer squeezed by the inner column 131, it can return to its original position under the action of the sixth spring 63. The middle part of the baffle 61 is hollowed out, and a plurality of cylinders 64 are fixedly connected at the hollowed-out part. Through the blocking of the cylinders 64, the plate material will not leave from the hollowed-out part of the baffle 61. And after the lifting plate 42 tilts up, the residues on the surface of the lifting plate 42 can leave through the hollowed-out part of the baffle 61, realizing the separation between the plate material and the residues, and preventing the residues from remaining on the surface of the device, which may affect the accuracy of the device during operation, and further cause insufficient processing accuracy of the sheet material and produce defective products.

[0026] As Figures 1 to 8 shown, a bending mechanism 5 is arranged on the front side of the bottom plate 3. The bending mechanism 5 includes a mounting plate 51 slidably connected to the surface of the bottom plate 3. The rear side of the mounting plate 51 extends backward to form an extension plate 511. The front side of the pressing plate 11 is fixedly connected with a pressing column 12. As the pressing plate 11 moves downward, the pressing column 12 moves downward with the pressing plate 11. A right trapezoidal groove 512 is formed at the position corresponding to the pressing column 12 inside the extension plate 511. By the downward movement of the pressing column 12 to squeeze the right trapezoidal groove 512, the extension plate 511 drives the mounting plate 51 to move backward, making the movement of the mounting plate 51 more convenient. A plurality of bending blocks 53 are slidably connected inside the mounting plate 51. By the mounting plate 51 driving the bending blocks 53 to move, the bending blocks 53 move toward the plate material and squeeze the plate material, facilitating the bending of the plate material, enabling the plate material to be processed in multiple aspects simultaneously, saving the processing time of the plate material. And a plurality of bending blocks 53 are provided, and the number of bending blocks 53 can be increased or decreased according to the bending position required by the plate material, with a wider range of applications. The front side of the bending block 53 extends to form a square block with an arc surface. By using the square block to bend the plate material, by placing bending blocks 53 without square blocks between two bending blocks 53, the number and arrangement of the bending blocks 53 can be adjusted according to the bending position and the amount of bending of the plate material, with a wider range of applications. The two sides of the top of the lifting plate 42 extend upward to form limit blocks 421. A fourth spring 513 is fixedly connected inside the mounting plate 51. During the movement of the mounting plate 51, it is convenient for the limit blocks 421 to squeeze the fourth spring 513, and the fourth spring 513 deforms. It is convenient for the mounting plate 51 to return to its original position under the action of the fourth spring 513, facilitating the reuse of the mounting plate 51, and the device has a wider range of applications.

[0027] As Figures 1 to 8As shown in the figure, a lead screw 52 is rotatably connected inside the mounting plate 51. The lead screw 52 penetrates through the bending block 53. Two sides inside the mounting plate 51 are slidably connected with pressing plates 55. By moving the two pressing plates 55, the two pressing plates 55 clamp and fix a plurality of bending blocks 53, which is convenient for the mounting plate 51 to squeeze the plate with the bending blocks 53 more conveniently. The pressing plate 55 and the lead screw 52 are connected by screw drive, which is convenient for rotating the lead screw 52 to drive the two pressing plates 55 to move relatively, and it is more convenient to fix a plurality of bending blocks 53. Guide plates 54 are slidably connected to the rear sides of the two pressing plates 55. By guiding the plate through the guide plates 54, it is more convenient for the plate to slide to the position of the clamping plate 62. The distance between the opposite surfaces of the two guide plates 54 is greater than the distance between the opposite surfaces of the two pressing plates 55, which is convenient for there to be a gap between the guide plate 54 and the sheet material to prevent the guide plate 54 from affecting the downward sliding of the plate. The cross-sectional shape of the guide plate 54 is a right trapezoid, and the inclined surface is at the bottom, which is convenient for when the lifting plate 42 tilts up, the guide plate 54 will not affect the tilting up of the lifting plate 42. A fifth spring 541 is welded inside the guide plate 54. When the mounting plate 51 moves and drives the guide plate 54 to move, the guide plate 54 slides on the top of the pressing plate 55, which will not affect the movement of the mounting plate 51. And the guide plate 54 and the pressing plate 55 squeeze the fifth spring 541, making the fifth spring 541 turn into a taut state, so that the guide plate 54 can return to its original position, which is convenient for the device to be reused.

[0028] The above is only the preferred specific implementation mode of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automatic production device for a sofa headrest hinge, comprising a frame (2), a hydraulic cylinder (1) is fixedly connected to the top of the frame (2), a bottom plate (3) is fixedly connected to the bottom of the frame (2), the end of the output shaft of the hydraulic cylinder (1) penetrates through the top plate of the frame (2) and extends into the interior of the frame (2), and a pressing plate (11) is fixedly connected to the end of the output shaft of the hydraulic cylinder (1), characterized in that: A guiding mechanism (4) is arranged inside the frame (2); The guiding mechanism (4) includes a driving block (41) slidably connected to the left side wall of the frame (2). A connecting rope (43) is fixedly connected to the bottom left side of the driving block (41). One side of the connecting rope (43) away from the driving block (41) is provided with a lifting plate (42) rotatably connected to the bottom plate (3). The top of the lifting plate (42) and the top of the bottom plate (3) are on the same horizontal plane. A third spring (44) is welded inside the driving block (41).

2. The automatic production equipment for a sofa headrest hinge according to claim 1, characterized in that: An outer column (13) is fixedly connected to the rear side of the pressing plate (11). A limiting mechanism (6) is arranged at the rear side of the bottom plate (3). The limiting mechanism (6) includes a baffle (61) fixedly connected to the bottom plate (3). A clamping plate (62) is slidably connected to the front side of the baffle (61). The outer column (13) and the clamping plate (62) are in the same vertical plane.

3. The automatic production equipment for a sofa headrest hinge according to claim 2, characterized in that: An inner column (131) is slidably connected inside the outer column (13). A trapezoidal block (134) is slidably connected inside the outer column (13). One end of the trapezoidal block (134) close to the inner column (131) penetrates through the outer column (13) and extends into the inner column (131).

4. An automatic production device for a sofa headrest hinge according to claim 3, characterized in that: A second spring (133) is welded inside the trapezoidal block (134). The second spring (133) changes from a natural extension state to a tense state during the process of the trapezoidal block (134) detaching from the inner column (131).

5. The automatic production equipment for a sofa headrest hinge according to claim 4, characterized in that: Sixth springs (63) are welded inside both sides of the front end of the clamping plate (62). The clamping plate (62) extends into the baffle (61) and is fixed to the sixth springs (63). The sixth springs (63) change from a natural extension state to a tense state during the process of the clamping plate (62) squeezing the sixth springs (63). The middle of the baffle (61) is hollowed out and a plurality of cylinders (64) are fixedly connected at the hollowed-out part.

6. The automatic production equipment for a sofa headrest hinge according to claim 5, characterized in that: A bending mechanism (5) is arranged at the front side of the bottom plate (3). The bending mechanism (5) includes a mounting plate (51) slidably connected to the surface of the bottom plate (3). The rear side of the mounting plate (51) extends backward to form an extension plate (511). An extrusion column (12) is fixedly connected to the front side of the pressing plate (11).

7. An automatic production device for a sofa headrest hinge according to claim 6, characterized in that: A right trapezoidal groove (512) is formed at the position corresponding to the extrusion column (12) inside the extension plate (511). A plurality of bending blocks (53) are slidably connected inside the mounting plate (51).

8. An automatic production device for a sofa headrest hinge according to claim 7, characterized in that: Limiting blocks (421) extend upward from both sides of the top of the lifting plate (42). A fourth spring (513) is fixedly connected inside the mounting plate (51).

9. An automatic production device for a sofa headrest hinge according to claim 8, characterized in that: A lead screw (52) is rotatably connected inside the mounting plate (51). The lead screw (52) penetrates through the bending blocks (53). Extrusion plates (55) are slidably connected to both sides inside the mounting plate (51). The extrusion plates (55) are in screw drive connection with the lead screw (52).

10. An automatic production device for a sofa headrest hinge according to claim 9, characterized in that: Guide plates (54) are slidably connected to the rear sides of the two pressing plates (55). The distance between the opposite surfaces of the two guide plates (54) is greater than the distance between the opposite surfaces of the two pressing plates (55). The cross-sectional shape of the guide plate (54) is a right trapezoid, and a fifth spring (541) is welded inside the guide plate (54).

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