A communication transmission device

Abstract

The present invention discloses a communication transmission device, and relates to the technical field of communication transmission devices. It comprises a device body and a U-shaped frame plate, a semicircular block is fixedly installed on the inner side of the U-shaped frame plate, a buffer assembly is arranged on the semicircular block, a positioning frame plate is fixedly installed on the buffer assembly, the device body is installed inside the positioning frame plate, a signal interface is arranged on the device body, and the signal interface is in a vertical ground state; a support plate is fixedly installed inside the U-shaped frame plate and below the semicircular block, an auxiliary assembly is arranged on the support plate, and an adjustment assembly is arranged on the U-shaped frame plate. The invention avoids a large force between the signal line and the signal interface through the coordinated use of the buffer assembly, the auxiliary assembly, the adjustment assembly and the limit assembly, effectively reduces the direct pulling force of the signal line on the device interface, thereby reducing the risk of the interface falling off and being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of communication transmission equipment, and in particular to a communication transmission equipment. Background Art

[0002] At present, the Internet has become an indispensable part of our life and work. Communication transmission equipment is a device that connects the local area networks and wide area networks in the Internet. It will automatically select and set the route according to the channel conditions and send signals along the best path. Communication transmission equipment is often connected to a large number of communication lines. When using communication transmission equipment, it needs to transmit and receive a large number of signals.

[0003] In the prior art, a Chinese patent with publication number "CN221670003U" discloses a communication transmission device that is easy to install. The communication transmission device can be locked and fixed by setting a locking device. Under the elastic support of the support device, the communication transmission device can be quickly installed and fixed. The situation of the communication transmission device can be viewed by setting a transparent window on the side door. The side door can be locked and opened by bolts. The protective box can protect the communication transmission device from rain and sun, which solves the problem that the existing communication transmission equipment is not easy to disassemble during maintenance, and the communication transmission equipment used outdoors has poor rain and sun protection performance and greatly reduced service life.

[0004] When existing communication transmission equipment is installed with a signal connector, in order to avoid the problem of the signal connector easily falling off, it is usually installed using the principle of snap-on. However, after such installation, since the communication transmission equipment cannot be fixed in a certain position, when a person accidentally pulls the signal connector, the communication transmission equipment will be pulled together, which can easily cause damage to the equipment body and the signal interface and signal connector. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a communication transmission device that solves the problems mentioned in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A communication transmission device, comprising a device body and a U-shaped frame plate, wherein a semicircular block is fixedly mounted on the inner side of the U-shaped frame plate, a buffer assembly is arranged on the semicircular block, a positioning frame plate is fixedly mounted on the buffer assembly, the device body is mounted inside the positioning frame plate, a signal interface is arranged on the device body, and the signal interface is in a vertical state to the ground;

[0008] A support plate is fixedly installed inside the U-shaped frame plate and below the semicircular block, an auxiliary component is arranged on the support plate, an adjustment component is arranged on the U-shaped frame plate, and an upper limit component of the adjustment component is effectively improved through the coordinated use of the auxiliary component, the adjustment component and the limit component.

[0009] Preferably, the buffer assembly includes a rotating groove arranged on a semicircular block, the interior of the rotating groove is rotatably connected to a rotating shaft, a positioning plate is fixedly installed on one end of the rotating shaft away from the rotating groove, the end of the positioning plate is fixedly installed on the positioning frame plate, a torsion spring is fixedly installed on the inner side of the positioning plate, the end of the torsion spring away from the positioning plate is fixedly connected to the interior of the rotating groove, and the torsion spring is located on the outside of the rotating shaft.

[0010] Preferably, an arc block is fixedly mounted on the positioning plate, and an arc groove for use with the arc block is formed on the side end surface of the semicircular block, and the arc block is slidably connected to the arc groove.

[0011] Preferably, a connecting shaft is fixedly installed on the outer side surface of the positioning plate, a marking pin is fixedly installed on the end of the connecting shaft away from the positioning plate, and a degree angle plate marked with ninety degrees is fixedly installed on the outer side surface of the U-shaped frame plate. A through groove is opened on the outer side of the degree angle plate, and the end of the marking pin passes through the through groove and fits with the degree angle plate.

[0012] Preferably, the auxiliary component includes a square through hole arranged on the support plate, the square through hole and the signal interface on the device body are in the same vertical direction, the interior of the square through hole is slidably connected with a sliding block, the sliding block is provided with a threading hole, a fastening component is arranged inside the threading hole, a tension spring is fixedly installed on the side end face of the sliding block, and the end of the tension spring away from the sliding block is fixedly connected to the inner side face of the square through hole.

[0013] Preferably, the fastening assembly includes a fastening plate slidably connected to the inside of the threading hole, a bearing 1 is fixedly mounted on the side end surface of the fastening plate, a fastening bolt is fixedly mounted on the bearing 1, an end of the fastening bolt away from the bearing 1 passes through the sliding block and extends to the outside of the sliding block, and the fastening bolt is threadedly connected to the sliding block.

[0014] Preferably, the adjustment assembly includes an adjustment slot and a lifting slot arranged on the U-shaped frame plate, the adjustment slot is located above the lifting slot, an adjustment block is slidably connected inside the lifting slot, a bearing 2 is fixedly mounted on the upper end surface of the adjustment block, an adjustment bolt is fixedly mounted on the bearing 2, an end of the adjustment bolt away from the bearing 2 extends to the inside of the adjustment slot, and the adjustment bolt is threadedly connected to the U-shaped frame plate.

[0015] Preferably, the limit assembly includes a limit block slidably connected in the lifting groove, the inner side surface of the limit block is rotatably connected to a pressure roller, the limit block is fixedly connected to a spring, the end of the spring away from the limit block is fixedly connected to the adjusting block, the U-shaped frame plate is provided with a mounting groove, the interior of the mounting groove is rotatably connected to a limit roller, the limit roller is provided with an annular groove, the pressure roller is positioned inside the mounting groove, and the pressure roller and the limit roller are in the same vertical direction.

[0016] Preferably, a mounting hole is provided on the side end surface of the U-shaped frame plate, and a communication slot is provided on the upper end surface of the U-shaped frame plate, and there are multiple mounting holes and communication slots.

[0017] The present invention provides a communication transmission device. Compared with the prior art, it has the following beneficial effects:

[0018] 1. The present invention installs the device body on the wall through a U-shaped frame plate. After the personnel connect the signal line to the signal interface on the device body, the tension generated when the personnel pulls the signal line will act on the device body, and the device body will rotate around the rotation axis through the cooperation of the positioning frame plate and the positioning plate, and the generated tension will act on the torsion spring, and the device body will be subjected to the tension and rotate, avoiding a large force between the signal line and the signal interface, effectively reducing the direct tension of the signal line on the device interface, thereby reducing the risk of the interface falling off and being damaged;

[0019] 2. When the positioning plate rotates, the positioning plate will synchronously drive the marking needle to rotate through the connecting shaft. The personnel can observe the angle of rotation of the marking needle on the angle plate, thereby effectively avoiding the phenomenon that the signal line and the signal interface fall off due to a large force;

[0020] 3. The present invention passes the signal line through the threading hole on the sliding block, and then rotates the fastening bolt to make the fastening plate slide in the threading hole by using the bearing, and uses the fastening bolt and the sliding block in coordination to fix the signal line to the inside of the threading hole by the fastening plate. When the signal line is pulled, the sliding block slides in the square through hole. The sliding block pulls the tension spring when sliding, and the tension spring is used to reduce the tension on the signal line, thereby effectively increasing the service life of the signal line and reducing damage caused by excessive tension, thereby improving the reliability of the overall equipment.

[0021] 4. The present invention uses bearing 2 to make the adjustment block slide in the lifting groove by rotating the adjustment bolt. When the adjustment block moves, it will adjust the elastic force of the spring in the lifting groove. When the elastic force is large, the force generated by the spring will directly act on the limit block. The position of the pressure roller in the installation groove is adjusted through the limit block. The pressure roller is used in conjunction with the annular groove on the limit roller to ensure that the signal line will not deviate when pulled, thereby avoiding damage to the signal line and the signal interface due to the tension in other directions caused by the deviation of the signal line when pulled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 3 It is a structural schematic diagram of the buffer assembly of the present invention;

[0025] Figure 4 is a cross-sectional view of a semicircular block in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the positioning plate in the present invention;

[0027] Figure 6 It is a partial cross-sectional view of the U-shaped frame plate in the present invention;

[0028] Figure 7 is a cross-sectional view of the support plate in the present invention;

[0029] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0030] In the figure: 1. Equipment body; 2. U-shaped frame plate; 3. Semicircular block; 4. Positioning frame plate; 5. Support plate; 6. Rotating groove; 7. Rotating shaft; 8. Positioning plate; 9. Torsion spring; 10. Arc block; 11. Arc groove; 12. Connecting shaft; 13. Marking needle; 14. Degree angle plate; 15. Through groove; 16. Square through hole; 17. Sliding block; 18. Threading hole; 19. Tension spring; 20. Fastening plate; 21. Bearing 1; 22. Fastening bolt; 23. Adjusting groove; 24. Lifting groove; 25. Adjusting block; 26. Bearing 2; 27. Adjusting bolt; 28. Limiting block; 29. ​​Pressing roller; 30. Spring; 31. Mounting groove; 32. Limiting roller; 33. Annular groove; 34. Mounting hole; 35. Communication groove; 36. Signal interface. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figure 1-8 The present invention is a communication transmission device, comprising a device body 1 and a U-shaped frame plate 2, a semicircular block 3 is fixedly installed on the inner side of the U-shaped frame plate 2, a buffer assembly is arranged on the semicircular block 3, a positioning frame plate 4 is fixedly installed on the buffer assembly, a signal interface 36 is arranged on the device body 1, and the signal interface 36 is in a vertical ground state, a mounting hole 34 is opened on the side end surface of the U-shaped frame plate 2, and a communication slot 35 is opened on the upper end surface of the U-shaped frame plate 2, and the number of the mounting holes 34 and the communication slots 35 is multiple, and the existing positioning pins are used in conjunction with the mounting holes 34 to facilitate the fixing of the U-shaped frame plate 2 on the wall, and the multiple communication slots 35 are used to ensure the signal reception of the device body 1;

[0033] A support plate 5 is fixedly installed inside the U-shaped frame plate 2 and below the semicircular block 3. An auxiliary component is arranged on the support plate 5. An adjustment component and an upper limit component of the adjustment component are arranged on the U-shaped frame plate 2. The buffering effect of the buffer component is effectively improved by the coordinated use of the auxiliary component, the adjustment component and the limit component. The buffer component includes a rotating groove 6 arranged on the semicircular block 3. A rotating shaft 7 is rotatably connected inside the rotating groove 6. A positioning plate 8 is fixedly installed at one end of the rotating shaft 7 away from the rotating groove 6. The end of the positioning plate 8 is fixedly installed with the positioning frame plate 4. A torsion spring 9 is fixedly installed on the inner side surface of the positioning plate 8. One end of the torsion spring 9 away from the positioning plate 8 is fixedly connected to the inside of the rotating groove 6. The position of the torsion spring 9 is on the outside of the rotating shaft 7. An arc block 10 is fixedly installed on the positioning plate 8. An arc groove 11 used in conjunction with the arc block 10 is opened on the side end surface of the semicircular block 3. The arc block 10 is slidably connected to the arc groove 11. The coordinated use of the arc block 10 and the arc groove 11 ensures the stability of the equipment body 1 during rotation.

[0034] A connecting shaft 12 is fixedly installed on the outer side surface of the positioning plate 8, and a marking pin 13 is fixedly installed on the end of the connecting shaft 12 away from the positioning plate 8, and a degree angle plate 14 marked with ninety degrees is fixedly installed on the outer side surface of the U-shaped frame plate 2. A through groove 15 is opened on the outer side of the degree angle plate 14, and the end of the marking pin 13 passes through the through groove 15 and fits with the degree angle plate 14, wherein the degree angle plate 14 has the same principle as the degree angle meter in the prior art. Since the degree angle meter is a technology well known to people in this field, it will not be described in detail here.

[0035] In this embodiment, the device body 1 is installed on the wall through the U-shaped frame plate 2. After the personnel connects the signal line to the signal interface 36 on the device body 1, the tension generated when the personnel pulls the signal line will act on the device body 1. The device body 1 will rotate around the rotating shaft 7 through the cooperation of the positioning frame plate 4 and the positioning plate 8, and the generated tension will act on the torsion spring 9. The device body 1 will be subjected to the tension and rotate, avoiding a large force between the signal line and the signal interface 36, effectively reducing the direct tension of the signal line on the device interface, thereby reducing the risk of the interface falling off and being damaged, and when the positioning plate 8 rotates, the positioning plate 8 will synchronously drive the mark pin 13 to rotate through the connecting shaft 12. The personnel can observe the angle of rotation of the mark pin 13 on the angle plate 14, thereby effectively avoiding the phenomenon that the signal line and the signal interface 36 fall off due to a large force.

[0036] Example 2: Please refer to Figure 1-8 On the basis of the first embodiment, the auxiliary component includes a square through hole 16 arranged on the support plate 5, the square through hole 16 and the signal interface 36 on the device body 1 are in the same vertical direction, the inside of the square through hole 16 is slidably connected with a sliding block 17, the sliding block 17 is provided with a threading hole 18, a fastening component is arranged inside the threading hole 18, a tension spring 19 is fixedly installed on the side end surface of the sliding block 17, and the end of the tension spring 19 away from the sliding block 17 is fixedly connected to the inner side surface of the square through hole 16, the fastening component includes a fastening plate 20 slidably connected to the inside of the threading hole 18, a bearing 21 is fixedly installed on the side end surface of the fastening plate 20, a fastening bolt 22 is fixedly installed on the bearing 21, the end of the fastening bolt 22 away from the bearing 21 passes through the sliding block 17 and extends to the outside of the sliding block 17, and the fastening bolt 22 is threadedly connected to the sliding block 17, wherein the number of the square through holes 16 is the same as the number of the signal interface 36 on the device body 1.

[0037] In this embodiment, the signal line is passed through the threading hole 18 on the sliding block 17, and then the fastening bolt 22 is rotated to make the fastening plate 20 slide in the threading hole 18 using the bearing 1 21. The fastening bolt 22 and the sliding block 17 are used in conjunction to fix the signal line on the fastening plate 20 inside the threading hole 18. When the signal line is pulled, the sliding block 17 slides in the square through hole 16. The sliding block 17 pulls the tension spring 19 when sliding. The tension spring 19 is used to reduce the tension on the signal line, thereby effectively increasing the service life of the signal line and reducing damage caused by excessive tension, thereby improving the reliability of the overall equipment.

[0038] Example 3: Please refer to Figure 1-8On the basis of the second embodiment, the adjustment component includes an adjustment slot 23 and a lifting slot 24 arranged on the U-shaped frame plate 2, the adjustment slot 23 is located above the lifting slot 24, an adjustment block 25 is slidably connected inside the lifting slot 24, a bearing 26 is fixedly installed on the upper end surface of the adjustment block 25, an adjustment bolt 27 is fixedly installed on the bearing 26, an end of the adjustment bolt 27 away from the bearing 26 extends to the inside of the adjustment slot 23, the adjustment bolt 27 is threadedly connected to the U-shaped frame plate 2, and the limit assembly includes a limit block 28 slidably connected in the lifting slot 24, and the inner side surface of the limit block 28 is rotatably connected to the pressure roller 29 A spring 30 is fixedly connected to the limit block 28, and one end of the spring 30 away from the limit block 28 is fixedly connected to the adjustment block 25. A mounting groove 31 is provided on the U-shaped frame plate 2, and a limit roller 32 is rotatably connected inside the mounting groove 31. An annular groove 33 is provided on the limit roller 32. The pressure roller 29 is located inside the mounting groove 31, and the pressure roller 29 and the limit roller 32 are in the same vertical square, wherein the annular groove 33 is used for limiting the signal line to avoid the signal line from being offset on the limit roller 32. The stability of the adjustment block 25 during lifting and lowering is ensured by the limiting sliding of the adjustment block 25 and the lifting groove 24.

[0039] In this embodiment, the adjusting bolt 27 is rotated to utilize the bearing 26 to make the adjusting block 25 slide in the lifting groove 24. When the adjusting block 25 moves, the elastic force of the spring 30 in the lifting groove 24 is adjusted. When the elastic force is large, the force generated by the spring 30 will directly act on the limit block 28. The position of the pressure roller 29 in the mounting groove 31 is adjusted through the limit block 28. The pressure roller 29 is used in conjunction with the annular groove 33 on the limit roller 32 to ensure that the signal line will not deviate when it is pulled, thereby avoiding the signal line being subjected to pulling force in other directions due to being deviated when it is pulled, thereby causing damage to the model line and the signal interface 36.

[0040] Working principle: When in use, install the device body 1 on the positioning frame plate 4, then pass the signal line through the pressure roller 29 and the limit roller 32 and the threading hole 18 on the sliding block 17 in sequence, and finally directly insert it into the signal interface 36;

[0041] When a person pulls the signal line, the tension generated will act on the device body 1, and the device body 1 will rotate around the rotating shaft 7 through the cooperation of the positioning frame plate 4 and the positioning plate 8, and the generated tension will act on the torsion spring 9, and the device body 1 will be subjected to the tension and rotate, thereby avoiding a large force between the signal line and the signal interface 36;

[0042] When the positioning plate 8 rotates, the positioning plate 8 will synchronously drive the marking pin 13 to rotate through the connecting shaft 12. The personnel can observe the angle of rotation of the marking pin 13 on the angle plate 14, thereby effectively avoiding the phenomenon that the signal line and the signal interface 36 fall off due to a large force;

[0043] The signal line is passed through the threading hole 18 on the sliding block 17, and then the fastening bolt 22 is rotated to make the fastening plate 20 slide in the threading hole 18 by using the bearing 1 21. The fastening bolt 22 cooperates with the sliding block 17 to fix the signal line in the threading hole 18 by the fastening plate 20. When the signal line is pulled, the sliding block 17 slides in the square through hole 16. When the sliding block 17 slides, the tension spring 19 is pulled to reduce the tension on the signal line, thereby effectively increasing the service life of the signal line and reducing damage caused by excessive tension.

[0044] By rotating the adjusting bolt 27 and using the bearing 26, the adjusting block 25 can slide in the lifting slot 24. When the adjusting block 25 moves, it can adjust the elastic force of the spring 30 in the lifting slot 24. When the elastic force is large, the force generated by the spring 30 can directly act on the limit block 28. The position of the pressure roller 29 in the mounting slot 31 can be adjusted through the limit block 28. The pressure roller 29 is used in conjunction with the annular groove 33 on the limit roller 32 to ensure that the signal line will not deviate when pulled.

[0045] When the pulling force disappears, the rotated device body 1 will return to its original position by the torsion force of the torsion spring 9 , and the sliding block 17 will also return to its original position in the square through hole 16 by the pulling force of the tension spring 19 .

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A communication transmission device, comprising a device body (1) and a U-shaped frame plate (2), characterized in that: A semicircular block (3) is fixedly mounted on the inner side of the U-shaped frame plate (2), a buffer assembly is arranged on the semicircular block (3), a positioning frame plate (4) is fixedly mounted on the buffer assembly, the device body (1) is mounted inside the positioning frame plate (4), a signal interface (36) is arranged on the device body (1), and the signal interface (36) is in a vertical position to the ground; A support plate (5) is fixedly installed inside the U-shaped frame plate (2) and below the semicircular block (3); an auxiliary component is arranged on the support plate (5); an adjustment component is arranged on the U-shaped frame plate (2); and an upper limit component of the adjustment component is effectively improved through the coordinated use of the auxiliary component, the adjustment component and the limit component. The buffer assembly comprises a rotation groove (6) arranged on the semicircular block (3), the interior of the rotation groove (6) is rotatably connected with a rotation shaft (7), a positioning plate (8) is fixedly installed at one end of the rotation shaft (7) away from the rotation groove (6), the end of the positioning plate (8) is fixedly installed with the positioning frame plate (4), a torsion spring (9) is fixedly installed on the inner side surface of the positioning plate (8), an arc block (10) is fixedly installed on the positioning plate (8), a side end surface of the semicircular block (3) is provided with an arc groove (11) for use with the arc block (10), a connecting shaft (12) is fixedly installed on the outer side surface of the positioning plate (8), a marking pin (13) is fixedly installed on the end of the connecting shaft (12) away from the positioning plate (8), a degree angle plate (14) marked with ninety degrees is fixedly installed on the outer side surface of the U-shaped frame plate (2), and a through groove (15) is provided on the outer side surface of the U-shaped frame plate (2) on the outer side of the degree angle plate (14); The auxiliary component comprises a square through hole (16) arranged on the support plate (5), the square through hole (16) and the signal interface (36) on the device body (1) are in the same vertical direction, the inside of the square through hole (16) is slidably connected to a sliding block (17), the sliding block (17) is provided with a threading hole (18), a fastening component is arranged inside the threading hole (18), a tension spring (19) is fixedly installed on the side end surface of the sliding block (17), the fastening component comprises a fastening plate (20) slidably connected to the inside of the threading hole (18), a bearing 1 (21) is fixedly installed on the side end surface of the fastening plate (20), and a fastening bolt (22) is fixedly installed on the bearing 1 (21); The adjustment assembly comprises an adjustment groove (23) and a lifting groove (24) arranged on the U-shaped frame plate (2); the adjustment groove (23) is located above the lifting groove (24); an adjustment block (25) is slidably connected inside the lifting groove (24); a second bearing (26) is fixedly mounted on the upper end surface of the adjustment block (25); an adjustment bolt (27) is fixedly mounted on the second bearing (26); the limit assembly comprises a limit block (28) slidably connected inside the lifting groove (24); a pressure roller (29) is rotatably connected to the inner side surface of the limit block (28); a spring (30) is fixedly connected to the limit block (28); one end of the spring (30) away from the limit block (28) is fixedly connected to the adjustment block (25); a mounting groove (31) is provided on the U-shaped frame plate (2); a limit roller (32) is rotatably connected inside the mounting groove (31); an annular groove (33) is provided on the limit roller (32).

2. A communication transmission device according to claim 1, characterized in that: One end of the torsion spring (9) away from the positioning plate (8) is fixedly connected to the inside of the rotating groove (6), and the torsion spring (9) is located outside the rotating shaft (7).

3. A communication transmission device according to claim 1, characterized in that: The arc block (10) is slidably connected to the arc groove (11).

4. A communication transmission device according to claim 1, characterized in that: The end of the marking pin (13) passes through the through slot (15) and fits into the angle plate (14).

5. A communication transmission device according to claim 1, characterized in that: One end of the tension spring (19) away from the sliding block (17) is fixedly connected to the inner side surface of the square through hole (16).

6. A communication transmission device according to claim 1, characterized in that: One end of the fastening bolt (22) away from the bearing (21) passes through the sliding block (17) and extends to the outside of the sliding block (17), and the fastening bolt (22) is threadedly connected to the sliding block (17).

7. A communication transmission device according to claim 1, characterized in that: One end of the adjusting bolt (27) away from the second bearing (26) extends to the inside of the adjusting groove (23), and the adjusting bolt (27) is threadedly connected to the U-shaped frame plate (2).

8. A communication transmission device according to claim 1, characterized in that: The pressure roller (29) is located inside the mounting groove (31), and the pressure roller (29) and the limiting roller (32) are in the same vertical direction.

9. A communication transmission device according to claim 1, characterized in that: A mounting hole (34) is provided on the side end surface of the U-shaped frame plate (2), and a communication slot (35) is provided on the upper end surface of the U-shaped frame plate (2), and the mounting hole (34) and the communication slot (35) are provided in plural numbers.

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