Earphone shell punching device

Abstract

The invention belongs to the technical field of earphone shell processing, and particularly discloses an earphone shell punching device which comprises a processing table, a discharging assembly is arranged at the top of the processing table, a punching assembly is arranged at the top of the processing table, and vertical plates which are evenly distributed are fixedly connected to the top of the processing table; a sliding plate is fixedly connected to the top of the vertical plate, a driving assembly is arranged at the top of the sliding plate, after an earphone shell is fixed to the containing plate, the discharging assembly conveys the earphone shell to the feeding plate under the assistance of the driving assembly, and the feeding plate and the driving assembly are driven by a first motor to move to the position below the punching assembly. And at the moment, the punching assembly conducts centralized punching treatment on the earphone shells under the assistance of the driving assembly, in the process, a second motor drives an overturning frame to rotate so that the earphone shells on the other face can move to the top to be subjected to punching treatment, the earphone shells located at the bottom can fall onto a collecting plate in a centralized mode, and efficient punching and centralized collection of the earphones are completed.

Description

Technical Field

[0001] The invention belongs to the field of earphone shell processing, and specifically discloses an earphone shell punching device. Background Art

[0002] As we all know, there are many types of earphone shells, which can be roughly classified into plastic earphone shells, ceramic earphone shells, wooden earphone shells, metal earphone shells, etc. According to the material, metal earphone shells are the most widely used due to their good processability and practicality. In the processing of the earphone shell, it is necessary to punch holes in the earphone shell. The earphone electronic product shell punching device is a device used to punch holes in the earphone electronic product shell during the processing of the earphone electronic product shell, and it has been widely used in the field of material processing.

[0003] After searching, Chinese patent CN213859632U ​​proposes a punching device for the shell of an earphone electronic product, which changes the manual punching method into mechanical punching, improves work efficiency, reduces the probability of damage, reduces material waste, and increases practicality; it includes a fixed plate, a motor assembly, two sets of bearing seats, an adjusting threaded rod, a mounting plate, an adjusting threaded ring, a drilling rig fixing block, a drilling rig, a drill bit, a support frame, a support block, a conveying guide rail and a feed guide rail, the bottom ends of the two sets of bearing seats are respectively connected to the top left area and the right area of ​​the fixed plate, the motor assembly is installed in the middle area of ​​the right end of the fixed plate, and an output hole is penetrated in the middle area of ​​the right end of the right bearing seat, the output end bearing of the motor assembly passes through the output hole and is connected to the right end of the adjusting threaded rod, the left end of the adjusting threaded rod is rotatably connected to the right end of the left bearing seat, and the adjusting threaded ring is screwed on the adjusting threaded rod.

[0004] However, the above-mentioned prior art still has the following defects during actual use: the prior art cannot effectively fix the earphone shell, and the drill bit can easily cause the entire earphone shell to shift during the drilling process, resulting in inaccurate and non-standard positions of the holes, thereby affecting the overall quality and appearance of the earphone. In addition, the prior art is less efficient in drilling holes in the earphone shell, which increases production costs. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide an earphone shell punching device to solve the problems in the prior art that the earphone shell cannot be effectively fixed and the punching efficiency is low.

[0006] To achieve the above purpose, the present invention provides an earphone shell punching device, comprising a processing table, a feeding assembly is arranged on the top of the processing table, a punching assembly is arranged on the top of the processing table, a uniformly distributed vertical plate is fixedly connected to the top of the processing table, a sliding plate is fixedly connected to the top of the vertical plate, a driving assembly is arranged on the top of the sliding plate, a movable hole is opened inside the processing table, and a feeding plate is slidably connected inside the movable hole; The unloading assembly is used to convey the earphone housing to the feeding plate; The feeding plate is used to move the earphone housing on the blanking assembly to below the punching assembly; The punching assembly is used to punch holes in the earphone housing on the feeding plate; The driving component is used to improve the processing efficiency of the punching component and the blanking component on the earphone shell.

[0007] In the above technical scheme, preferably, the feeding plate is rotatably connected to a flip frame inside, and evenly distributed positioning components are fixedly connected to both sides of the flip frame, and the positioning components include a first support ring fixedly connected to the outer wall of the flip frame, a second support ring is arranged on the top of the first support ring, a positioning fixture is fixedly connected to the inside of the second support ring, an elastic ring is fixedly connected to the top of the inner wall of the positioning fixture, a first motor is fixedly installed on the top of the processing table, and a screw installed on the top of the processing table is fixedly connected to the output end of the first motor, a screw sleeve is screwed on the outer wall of the screw, and the screw sleeve is connected to the flip frame through a connecting plate.

[0008] The cam is an assembly made of a plurality of movable parts, each of which is connected with a plurality of movable parts in a plurality of movable parts portfolios with corresponding positions, and the movable parts portfolios have the plurality of movable parts and portfolios, and the plurality of movable parts portfolios have the plurality of movable parts portfolios.

[0009] In the above technical solution, preferably, the punching assembly includes a slide plate slidably connected to the relative vertical plate, the interior of the slide plate is slidably connected to a second pressure plate, a plurality of punching mechanisms and dust removal nozzles are fixedly installed on the second pressure plate, the top of the slide plate is fixedly connected to a second support plate, the bottom of the second support plate is fixedly installed with a third electric push rod, and the driving rod of the third electric push rod is connected to the second pressure plate.

[0010] In the above technical solution, preferably, the tops of the first support plate and the second support plate are fixedly connected with a pair of magnetic matching plates that are far apart from each other, and the outer wall of the sliding plate is fixedly installed with de-energized electromagnets whose number and positions correspond to those of the magnetic matching plates.

[0011] In the above technical solution, preferably, the driving assembly includes a support platform slidably connected to the sliding plate, and the support platform is connected to the screw sleeve through a special-shaped plate, a driving cylinder is fixedly installed on the top of the support platform, a magnetic matching block is fixedly installed on the driving rod of the driving cylinder, and electromagnets are fixedly installed on the tops of the first support plate and the second support plate, and the electromagnets are slidably connected and inserted into the top of the sliding plate.

[0012] In the above technical scheme, preferably, a second motor is fixedly installed inside the feeding plate, and the output end of the second motor is connected to the flip frame, and the same connecting plate is fixedly connected to the outer wall of the evenly distributed positioning assembly on one side of the flip frame, and evenly distributed supporting springs are fixedly connected between the second support ring and the first support ring, dual-axis motors are fixedly installed on both sides of the outer wall of the feeding plate, abutment blocks and arc-shaped matching blocks are fixedly connected to the top and bottom output shafts of the dual-axis motor, respectively, arc-shaped edge sealings are fixedly connected on both sides of the outer wall of the connecting plate, abutment rods corresponding to the number and position of the positioning fixture are fixedly connected on both sides of the outer wall of the flip frame, a through hole is opened at the bottom of the positioning fixture, and an inclined collecting plate is fixedly connected to the inside of the processing table.

[0013] In the above technical solution, preferably, spring damping rods are provided between the four corners of the outer wall of the connecting plate and the flip frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: After the earphone shell is fixed on the placement plate, the unloading assembly transports it to the feeding plate with the assistance of the driving assembly. The feeding plate and the driving assembly are driven by the first motor to move under the punching assembly. At this time, the punching assembly performs centralized punching processing on the earphone shell with the assistance of the driving assembly. During the process, the second motor drives the flip frame to rotate so that the earphone shell on the other side moves to the top for punching processing, and the earphone shell at the bottom falls onto the collection plate, completing the efficient punching and centralized collection of the earphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after removing the driving component; Figure 3 It is a schematic diagram of the structure of the blanking assembly of the present invention; Figure 4 It is a schematic diagram of the movable structure of the pressing plate of the present invention; Figure 5 It is a schematic diagram of the structure of the feeding plate of the present invention; Figure 6 It is a schematic diagram of the punching mechanism structure of the present invention; Figure 7 This is a schematic diagram of the first viewing angle structure of the flip frame of the present invention; Figure 8 This is a schematic diagram of the second viewing angle structure of the flip frame of the present invention; Fig. 9 It is a schematic diagram of the structure of the dual-axis motor of the present invention; Fig.10 It is a schematic diagram of the internal structure of the positioning fixture of the present invention.

[0016] In the figure: 1, processing table; 2, unloading assembly; 3, feeding plate; 4, driving assembly; 5, vertical plate; 6, sliding plate; 7, power-off electromagnet; 8, magnetic matching plate; 9, electromagnet; 10, sliding frame; 11, first support plate; 12, first electric push rod; 13, placement plate; 14, fixing hole; 15, limit spring; 16, first pressure plate; 17, contact column; 18, guide rod; 19, second electric push rod; 20, first motor; 21, screw; 22, screw sleeve; 23, support table; 24, driving cylinder ; 25. Second support plate; 26. Third electric push rod; 27. Slide plate; 28. Punching mechanism; 29. ​​Dust removal nozzle; 30. Flip frame; 31. Positioning assembly; 32. Connecting plate; 33. Double-axis motor; 34. Spring damping rod; 35. Arc-shaped edge sealing; 36. Arc-shaped matching block; 37. Abutment block; 38. First support ring; 39. Second support ring; 40. Support spring sheet; 41. Positioning fixture; 42. Abutment rod; 43. Elastic ring; 44. Collecting plate; 45. Second motor; 46. Second pressure plate. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] like Figure 1-Figure 10 The headphone shell punching device shown includes a processing table 1, a blanking component 2 is arranged on the top of the processing table 1, a punching component is arranged on the top of the processing table 1, a vertical plate 5 evenly distributed is fixedly connected to the top of the processing table 1, a sliding plate 6 is fixedly connected to the top of the vertical plate 5, a driving component 4 is arranged on the top of the sliding plate 6, a movable hole is opened inside the processing table 1, a feeding plate 3 is slidably connected inside the movable hole, the feeding plate 3 is used to move the headphone shell on the blanking component 2 to the bottom of the punching component, and the punching component is used to punch the headphone shell on the feeding plate 3.

[0020] The feeding plate 3 is rotatably connected to the inside of the flip frame 30, and the two sides of the flip frame 30 are fixedly connected with uniformly distributed positioning components 31. The flip frame 30 can be flipped, and the positioning components 31 for fixing the earphone housing are installed on both sides of the flip frame 30, so that the carrying efficiency of the flip frame 30 is improved. The positioning component 31 includes a first support ring 38 fixedly connected to the outer wall of the flip frame 30, and a second support ring 39 is arranged on the top of the first support ring 38. The interior of the second support ring 39 is fixedly connected with a positioning fixture 41, and the top of the inner wall of the positioning fixture 41 is fixedly connected with an elastic The elastic ring 43 can facilitate the earphone shell to be inserted into the interior of the positioning fixture 41 through the elastic extension of the elastic ring 43, and at the same time, it plays a fixing role on the earphone shell inserted into the interior of the positioning fixture 41. A first motor 20 is fixedly installed on the top of the processing table 1, and a screw 21 installed on the top of the processing table 1 is fixedly connected to the output end of the first motor 20. The outer wall of the screw 21 is screwed with a screw sleeve 22, and the screw sleeve 22 is connected to the flip frame 30 through a connecting plate. The first motor 20 drives the screw 21 to rotate to drive the flip frame 30 to move back and forth, so that the blanking component and the driving component are switched back and forth.

[0021] The blanking assembly 2 is used to convey the earphone shell to the feeding plate 3. The blanking assembly 2 includes a sliding frame 10 slidably connected between two opposite vertical plates 5. The top of the sliding frame 10 is fixedly connected to a first supporting plate 11. The bottom of the first supporting plate 11 is fixedly installed with a first electric push rod 12 through a mounting plate. A first pressing plate 16 is fixedly connected to the driving rod of the first electric push rod 12. The top of the first pressing plate 16 is fixedly connected to a pair of guide rods 18 that are slidably connected and inserted into the mounting plate for fixing the first electric push rod 12. The bottom of the first pressing plate 16 is fixedly connected to evenly distributed contact columns 17. The first electric push rod 12 can drive the first pressing plate 16 and the contact columns 17 to be pressed down synchronously. A pair of connected placing plates 13 are slidably connected inside the sliding frame 10. The outer wall of the placing plate 13 is provided with fixing holes 14 corresponding to the number of the contact columns 17. The fixing holes 14 are fixedly connected to evenly distributed limiting springs 15. After the earphone shell is inserted into the fixing hole 14, the limiting springs 15 are affected by the limiting springs 15. The pressure contracts itself and provides a fixing force to reversely fix the earphone shell. A second electric push rod 19 is fixedly installed on one side of the outer wall of the sliding frame 10, and the driving rod of the second electric push rod 19 is connected to one of the placement plates 13. The second electric push rod 19 pulls the two placement plates 13 to move back and forth to change their positions, so that the contact column 17 can be out of the fixing hole 14 of the earphone shell fixed by the limiting spring sheet 15, and then enter the interior of the positioning fixture 41. During the process, the elastic ring 43 is elastically stretched, and the earphone shell moves down along the arc surface when contacting the elastic ring 43, and pressure is applied to the contacted arc surface to make it tilt outward, so that the earphone shell can be stuck into the interior of the positioning fixture 41. Thereafter, the earphone shell is fixed to the interior of the positioning fixture 41 under the squeezing of the arc surface of the elastic ring 43, thereby completing the position conversion of the earphone shell from the fixing hole 14 to the interior of the positioning fixture 41. During the process, the user can place the earphone shell on the placement plate 13 on the other side, so that the conveying efficiency is improved.

[0022] The punching assembly includes a slide plate 27 slidably connected to the relative vertical plate 5, and a second pressure plate 46 is slidably connected inside the slide plate 27. A plurality of punching mechanisms 28 and dust removal nozzles 29 are fixedly installed on the second pressure plate 46. The punching mechanism 28 performs a punching process on the earphone shell, and the dust removal nozzle 29 can remove debris during the process. The top of the slide plate 27 is fixedly connected to a second support plate 25, and a third electric push rod 26 is fixedly installed on the bottom of the second support plate 25, and the driving rod of the third electric push rod 26 is connected to the second pressure plate 46. The third electric push rod 26 drives the punching mechanism 28 to press down to punch holes in the earphone shell.

[0023] A pair of magnetic matching plates 8 which are separated from each other are fixedly connected to the top of the first support plate 11 and the second support plate 25. A number and position of de-energized electromagnets 7 corresponding to the magnetic matching plates 8 are fixedly installed on the outer wall of the sliding plate 6. When the de-energized electromagnets 7 are not energized, they contain magnetism to adsorb the magnetic matching plates 8. The two enable the positions of the punching assembly and the blanking assembly to be specifically lifted.

[0024] The driving assembly 4 is used to improve the processing efficiency of the punching assembly and the blanking assembly 2 on the earphone shell. The driving assembly 4 includes a support table 23 slidably connected to the sliding plate 6, and the support table 23 is connected to the screw sleeve 22 through a special-shaped plate. Through the connection of the special-shaped plate, the feeding plate 3 can be brought to move synchronously with the driving assembly 4 when it moves to complete the position movement. A driving cylinder 24 is fixedly installed on the top of the supporting table 23, and a magnetic matching block is fixedly installed on the driving rod of the driving cylinder 24. The first supporting plate 11 and the second supporting plate 25 An electromagnet 9 is fixedly installed on the top, and the electromagnet 9 is slidably connected and inserted into the top of the sliding plate 6. When the electromagnet 9 is energized, it generates magnetism to adsorb the magnetic matching block. At this time, the power-off electromagnet 7 loses its magnetism after being energized. Therefore, the lifters of the blanking component 2 and the punching component are converted into the driving cylinder 24. At this time, the driving cylinder 24 can drive the blanking component 2 or the punching component to move downward, and cooperate with the downward pressure inside it, so that the downward pressure speed of the contact column 17 or the punching mechanism 28 is improved, and its processing efficiency is also improved accordingly.

[0025] A second motor 45 is fixedly installed inside the feeding plate 3, and the output end of the second motor 45 is connected to the flip frame 30. The second motor 45 can drive the flip frame 30 to rotate, thereby changing the upward side. After the earphone shell on one side completes the punching work, it can be flipped so that the other side faces upward, and then it is punched, so that more earphone shells can be processed at one time, and the punching efficiency is significantly improved. The outer wall of the uniformly distributed positioning assembly 31 on one side of the flip frame 30 is fixedly connected with the same connecting plate 32, and the second support ring 39 and the first support ring 38 are fixedly connected with uniformly distributed support springs 40. The support springs 40 enable the second support ring 39 and the first support ring 38 to be elastically connected. The outer wall of the feeding plate 3 is fixedly installed with a dual-axis motor 33 on both sides, and the top and bottom output shafts of the dual-axis motor 33 are respectively fixedly connected with abutment blocks 37 and arc-shaped matching blocks 36. The outer wall of the connecting plate 32 is fixedly connected with The arc-shaped edge sealing 35, the dual-axis motor 33 drives its dual-axis rotation, so that the abutment block 37 is located below the connecting plate 32, thereby providing support force for the connecting plate 32. At this time, the positioning fixture 41 used to fix the earphone shell is fully supported, and the downward-pressed punching mechanism 28 can stably perform the punching work. The outer wall of the flip frame 30 is fixedly connected with abutment rods 42 corresponding to the number and position of the positioning fixtures 41 on both sides, and a through hole is provided at the bottom of the positioning fixture 41. The interior of the processing table 1 is fixedly connected with an inclined collecting plate 44. The flip frame 30 is rotated to turn over, and the punched side faces downward. The dual-axis motor 33 is started again to drive its dual-axis movement, so that the arc-shaped matching block 36 contacts with the arc-shaped edge sealing 35. The contact between the two will cause the connecting plate 32 to be squeezed and move upward, thereby causing the positioning fixture 41 to move synchronously, so that the abutment rod 42 is inserted into the interior of the positioning fixture 41 and pushes out the internal earphone shell. The fallen earphone shell is collected along the pulley of the collection plate 44 to complete the centralized collection.

[0026] Spring damping rods 34 are provided between the four corners of the outer wall of the connecting plate 32 and the flip frame 30 . This design can provide a guiding effect for the movement of the connecting plate 32 .

[0027] Working principle: After the earphone shell is fixed on the placement plate 13, the unloading component 2 transports it to the feeding plate 3 with the assistance of the driving component 4. The feeding plate 3 and the driving component 4 are driven by the first motor 20 to move under the punching component. At this time, the punching component performs centralized punching processing on the earphone shell with the assistance of the driving component 4. During the process, the second motor 45 drives the flip frame 30 to rotate so that the earphone shell on the other side moves to the top for punching processing, and the earphone shell at the bottom falls onto the collection plate 44, completing the efficient punching and centralized collection of the earphones.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. An earphone housing punching device, comprising a processing station (1), characterized in that: The top of the processing table (1) is provided with a material discharge assembly (2), the top of the processing table (1) is provided with a hole punching assembly, the top of the processing table (1) is fixedly connected with evenly distributed vertical plates (5), the top of the vertical plates (5) is fixedly connected with a sliding plate (6), the top of the sliding plate (6) is provided with a driving assembly (4), and a movable hole is opened inside the processing table (1), and a feeding plate (3) is slidably connected inside the movable hole; The unloading assembly (2) is used to convey the earphone housing to the feeding plate (3); The feeding plate (3) is used to move the earphone housing on the blanking assembly (2) to below the punching assembly; The punching assembly is used to punch holes in the earphone housing on the feeding plate (3); The driving component (4) is used to improve the processing efficiency of the punching component and the blanking component (2) on the earphone housing.

2. The earphone housing punching device according to claim 1, characterized in that: The feeding plate (3) is rotatably connected to a flip frame (30) inside, and evenly distributed positioning components (31) are fixedly connected to both sides of the flip frame (30), and the positioning components (31) include a first support ring (38) fixedly connected to the outer wall of the flip frame (30), a second support ring (39) is arranged on the top of the first support ring (38), a positioning fixture (41) is fixedly connected inside the second support ring (39), and an elastic ring (43) is fixedly connected to the top of the inner wall of the positioning fixture (41), and a first motor (20) is fixedly installed on the top of the processing table (1), and a screw rod (21) installed on the top of the processing table (1) is fixedly connected to the output end of the first motor (20), and a screw sleeve (22) is screwed on the outer wall of the screw rod (21), and the screw sleeve (22) is connected to the flip frame (30) through a connecting plate.

3. The earphone housing punching device according to claim 2, characterized in that: The blanking assembly (2) comprises a sliding frame (10) slidably connected between two opposite vertical plates (5); a first support plate (11) is fixedly connected to the top of the sliding frame (10); a first electric push rod (12) is fixedly mounted to the bottom of the first support plate (11) via a mounting plate; a first pressing plate (16) is fixedly connected to a driving rod of the first electric push rod (12); a pair of guide rods (18) slidably connected and inserted into a mounting plate for fixing the first electric push rod (12) are fixedly connected to the top of the first pressing plate (16); The bottom of the plate (16) is fixedly connected to uniformly distributed contact pillars (17), the interior of the sliding frame (10) is slidably connected to a pair of connected placement plates (13), the outer walls of the placement plates (13) are provided with fixing holes (14) corresponding in number to the contact pillars (17), the interiors of the fixing holes (14) are fixedly connected to uniformly distributed limiting springs (15), a second electric push rod (19) is fixedly mounted on one side of the outer wall of the sliding frame (10), and the driving rod of the second electric push rod (19) is connected to one of the placement plates (13).

4. The earphone housing punching device according to claim 3, characterized in that: The punching assembly comprises a slide plate (27) slidably connected to the relative vertical plate (5); a second pressing plate (46) is slidably connected inside the slide plate (27); a plurality of punching mechanisms (28) and dust removal nozzles (29) are fixedly mounted on the second pressing plate (46); a second supporting plate (25) is fixedly mounted on the top of the slide plate (27); a third electric push rod (26) is fixedly mounted on the bottom of the second supporting plate (25); and a driving rod of the third electric push rod (26) is connected to the second pressing plate (46).

5. The earphone housing punching device according to claim 4, characterized in that: A pair of magnetic matching plates (8) spaced apart from each other are fixedly connected to the tops of the first support plate (11) and the second support plate (25), and de-energized electromagnets (7) corresponding in number and position to the magnetic matching plates (8) are fixedly mounted on the outer wall of the sliding plate (6).

6. The earphone housing punching device according to claim 4, characterized in that: The driving assembly (4) comprises a support platform (23) slidably connected to the sliding plate (6), and the support platform (23) is connected to the screw sleeve (22) via a special-shaped plate, a driving cylinder (24) is fixedly mounted on the top of the support platform (23), a magnetic matching block is fixedly mounted on the driving rod of the driving cylinder (24), and an electromagnet (9) is fixedly mounted on the top of each of the first supporting plate (11) and the second supporting plate (25), and the electromagnet (9) is slidably connected and inserted into the top of the sliding plate (6).

7. The earphone housing punching device according to claim 2, characterized in that: A second motor (45) is fixedly mounted inside the feed plate (3), and an output end of the second motor (45) is connected to the flip frame (30). The outer walls of the uniformly distributed positioning components (31) on one side of the flip frame (30) are all fixedly connected to the same connecting plate (32). The second supporting ring (39) and the first supporting ring (38) are fixedly connected to supporting springs (40) that are uniformly distributed. Dual-axis motors (33) are fixedly mounted on both sides of the outer wall of the feed plate (3). Abutment blocks (37) and arc-shaped matching blocks (36) are fixedly connected to the top and bottom output shafts of the dual-axis motor (33), respectively. Arc-shaped edge sealing (35) are fixedly connected to both sides of the outer wall of the connecting plate (32). Abutment rods (42) corresponding in number and position to the positioning fixtures (41) are fixedly connected to both sides of the outer wall of the flip frame (30). A through hole is provided at the bottom of the positioning fixture (41). An inclined collecting plate (44) is fixedly connected to the inside of the processing table (1).

8. The earphone housing punching device according to claim 7, characterized in that: Spring damping rods (34) are provided between the four corners of the outer wall of the connecting plate (32) and the flip frame (30).

Images