Self-protection portable communication terminal

By designing automatically expanded protective pads and servo motor systems on portable communication terminals, the problems of easy to break and the protective structure of the equipment are solved, and the self -protection and protective structure of the equipment are realized.

CN119363139APending Publication Date: 2025-01-24吴拉弟
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Patent Information

Application Number
CN202411462834.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-19
Publication Date
2025-01-24

AI Technical Summary

Technical Problem

Existing portable communication terminals generally do not have self-protection functions, which are prone to breakage, and the existing protective structures are usually disposable or not beautiful enough.

Method used

A self-protective portable communication terminal is designed, which uses a protective component including a protective pad, a free fall sensor, a servo motor and a ratchet and pawl mechanism. When the device falls, the sensor senses and starts the servo motor, driving the protective pad to automatically unfold. Protects the device and automatically resets when the device is picked up, allowing repeated use.

Benefits of technology

The self -protective portable communication terminal has a self -protection function, which can automatically expand the protective pads when the device falls to avoid device damage and the protective structure can be repeatedly used without affecting the appearance of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a self-protection portable communication terminal, and belongs to the technical field of portable communication terminals, the self-protection portable communication terminal comprises a machine body, an ejection assembly and a protection assembly, the machine body is provided with a switch button, the inner side of the machine body is provided with a rectangular inner support frame, the inner support frame is provided with the ejection assembly, and the machine body is provided with the protection assembly. The portable communication terminal has the self-protection function, the protection mechanism can be automatically unfolded in the falling process of the mobile phone, the protection effect is achieved, the portable communication terminal is prevented from being damaged, the protection structure on the portable communication terminal can be repeatedly used, the protection structure can be stored in the machine body, and the external attractiveness of the portable communication terminal is not affected.
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Description

Technical Field

[0001] The present invention relates to the technical field of portable communication terminals, in particular to a self-protection portable communication terminal. Background Art

[0002] With the rapid development of electronic technology, communication technology and integrated circuit technology, the miniaturization and integration of equipment have become a trend. The continuous improvement of processor performance has enabled portable communication terminals to handle complex communication tasks and run various applications. At the same time, the advancement of battery technology has also extended the battery life of portable devices, making it possible for portable communication terminals to be widely used. There are still some problems in the use of existing portable communication terminals, specifically: 1. Existing portable communication terminals are generally not equipped with a self-protection function. Since the portable communication terminal is not only equipped with many small parts, but also with a screen that is easily damaged, when the portable communication terminal is not equipped with a self-protection function, it is very easy to be broken, resulting in the communication terminal being unusable; 2. Even if the existing portable communication terminal is provided with a protective structure, the protective structure is generally disposable and cannot be reused, or the protective structure is exposed outside the body, which is not aesthetically pleasing; Therefore, a self-protection portable communication terminal is needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a self-protection portable communication terminal to solve the problem mentioned in the background art that the existing portable communication terminals generally do not have a self-protection function.

[0004] To achieve the above object, the present invention provides the following technical solutions: A self-protection portable communication terminal comprises a body, an ejection assembly and a protection assembly, wherein a switch button is installed on the body, a rectangular inner support frame is arranged inside the body, the ejection assembly is installed on the inner support frame, and the protection assembly is arranged on the body.

[0005] Preferably, the protection component includes a protection pad, a free fall sensor, a limit plate, a pad, a tooth plate, a transmission gear, a transmission rod, a connecting pipe, a pulley, a transmission belt, a shaft, a worm wheel, a worm, a servo motor, a driving rod, a limit plate, a toggle block, a strip through groove, a support rod, a spring and a connecting block. Pads are installed at the four corners of the body, and only three pads are installed with free fall sensors, and a servo motor is arranged on the pad without the free fall sensor installed, and the lower end of each pad is connected to the shaft with a bearing, and the middle part of each shaft is keyed to Pulley, four of the pulleys are connected by a transmission belt, and the transmission belt is arranged on the outside of the inner support frame, the upper end bearing of the shaft rod where the free fall sensor position is not arranged passes through to the top of the corresponding pad, and the outer key of the upper end of the shaft rod is connected with a worm wheel, the outer side of the worm wheel is meshedly connected with a worm, and the worm is coaxially fixedly connected to the shaft end of the servo motor, and four limit plates are provided, and the four limit plates are respectively arranged on the outside of the four surfaces of the transmission belt, the lower surface of the limit plate is slidably connected to the inner bottom surface of the body, and the middle part of the limit plate is fixedly connected to the outer side of the transmission belt. , the middle part of the limit plate is fixedly connected to the transmission belt, so that within a certain range, when the transmission belt rotates, the limit plate is driven to move horizontally, each of the limit plates is evenly angled with a strip through groove, and each strip through groove is fixedly connected with a support rod, each of the support rods movably passes through one end of the corresponding connecting block, and the other end of the connecting block is fixedly connected to one side of the corresponding driving rod, and the driving rod is also provided with 4, and the lower surface of the driving rod is also slidably connected to the inner bottom surface of the machine body, and the outer side of each support rod is provided with two springs, and the two ends of the springs are respectively connected to the strip through grooves. One end of the groove and the outer side of the corresponding connecting block, the connecting block is evenly distributed with toggle blocks, and a tooth plate is arranged corresponding to the position of the toggle block, the upper end of each tooth plate is movably nested in the lower end of the corresponding limit plate, and the upper end of the limit plate is fixedly connected to the inner top surface of the machine body, the side surface of each tooth plate is meshed and connected with the corresponding transmission gear, and the transmission gear key is connected to the outer side of the corresponding transmission rod, the outer end of the transmission rod is fixedly connected with one end of the protective pad, and the inner end of the transmission rod is movably extended to the inner side of one end of the corresponding connecting pipe, and the other end of the connecting pipe is fixedly connected to the inner support frame.

[0006] Preferably, through grooves matching the shape of the protective pad are evenly arranged on the machine body, and the positions of the through grooves correspond to the positions of the protective pad one by one.

[0007] Preferably, the protective pad is made of elastic plastic material, and a rubber sleeve is provided on the outer side of the protective pad. The protective pad is provided with two ends, namely end a and end b, and the two protective pads are connected by two transmission rods that are relatively close to each other, and are respectively connected to the corresponding transmission rods through end a and end b. The length of the protective pad is not less than twice the thickness of the body.

[0008] Preferably, the structural shape of the toggle block is an isosceles triangular prism.

[0009] Preferably, the transmission belt is a rectangular structure with arc-shaped four corners, and the middle parts of the four side surfaces are respectively fixedly connected to the middle parts of the corresponding side surfaces of the limiting plate.

[0010] Preferably, the ejection assembly includes a spring 1, a groove, a spring sheet and a ratchet and pawl mechanism, the grooves are evenly distributed on the limit plate, and a spring sheet is arranged in each groove, the spring sheet is connected to the lower end of the corresponding ratchet and pawl mechanism, and the ratchet and pawl mechanism is arranged at the middle lower end of each transmission rod, and the inner end of the connecting tube is connected to the transmission rod extending into it through a spring 1.

[0011] Preferably, the middle and rear parts of the transmission rod, and the connecting pipe are all semi-cylindrical in shape.

[0012] Preferably, the width of the ratchet and pawl mechanism is smaller than the length of the strip-shaped through slot.

[0013] Preferably, the width of the transmission gear is not less than twice the width of the tooth plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the self-protection portable communication terminal has a self-protection function, and the protection mechanism can be automatically deployed during the falling process of the mobile phone to play a protective role, thereby preventing the portable communication terminal from being damaged, and the protection structure on the portable communication terminal can be used repeatedly, and the protection structure can be stored inside the body without affecting its external aesthetics: 1. Through multiple free fall sensors, it can sense in real time whether the machine is in a free fall state. When the free fall sensor senses that the machine is in a free fall state, it can quickly transmit the signal to the processor inside the machine, and start the servo motor through the processor. Through the operation of the servo motor, the worm drives the worm wheel to rotate, and then the shaft drives the pulley to rotate, and drives the transmission belt to rotate. When the transmission belt rotates, it drives the 4 limit plates to move. When the limit plate moves to the ratchet and pawl on the ratchet and pawl mechanism, the ratchet and pawl are completely misaligned, and under the action of spring 1, the transmission The rod will move along its axis, so that the protective pad extends out of the body, and then the connecting block moves to the limit position in the strip groove, and the limit plate continues to move, which will drive the driving rod to move synchronously, so that the toggle block on the driving rod squeezes the tooth plate, so that the tooth plate moves along its axis, driving the transmission rod connected to it to rotate, and then the protective pad rotates. Through the counterclockwise and clockwise rotation of the protective pad, a protective ring is formed around the body, so that when the body falls, the protective pad contacts the ground first, thereby avoiding damage to small parts inside the body and preventing the screen from being damaged; 2. When the user picks up the portable communication terminal, the free fall sensor can detect that it is not in a free fall state at this time. The servo motor drives the limit plate to move counterclockwise and reset. After that, the user can rotate the protective pad and press the protective pad back into the through groove set on the body. In the process of rotating and pressing the protective pad, the tooth plate is reset first, and then the ratchet and pawl mechanism is used to prevent the protective pad from being ejected, so that the protective component can be used repeatedly. In addition, the ratchet and pawl mechanism can make the clicking sound during the process of pressing the protective pad back, which can also play a role in decompression. In addition, since the protective component does not protrude from the body when it is not unfolded, it is beautiful enough. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 For the present invention Figure 3 A schematic diagram of the enlarged structure of point A; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point B in the middle; Figure 5 It is a schematic diagram of a partial cross-sectional structure of the present invention; Figure 6 For the present invention Figure 5 The schematic diagram of the enlarged structure of point C in the middle; Figure 7 It is a schematic diagram of a partial three-dimensional structure of the present invention when viewed from above; Figure 8 For the present invention Figure 7 The enlarged structural diagram of point D in the middle; Fig. 9 It is a schematic diagram of the connection structure between the driving rod and the limiting plate of the present invention; Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point E.

[0016] In the figure: 1. body; 2. switch button; 3. protective pad; 4. inner support frame; 5. free fall sensor; 6. limit plate; 7. pad; 8. tooth plate; 9. transmission gear; 10. transmission rod; 11. connecting pipe; 12. pulley; 13. transmission belt; 14. shaft; 15. worm wheel; 16. worm; 17. servo motor; 18. drive rod; 19. spring one; 20. limit plate; 21. groove; 22. spring sheet; 23. ratchet and pawl mechanism; 24. toggle block; 25. strip through groove; 26. support rod; 27. spring two; 28. connecting block. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: Embodiment 1:

[0019] In order to solve the problem that portable communication terminals in the past are generally not equipped with a self-protection function, the following technical solution is provided, specifically, a self-protection portable communication terminal, including a body 1, an ejection component and a protection component, a switch button 2 is installed on the body 1, and a rectangular inner support frame 4 is provided on the inner side of the body 1, and a protection component is provided on the body 1.

[0020] The protection component includes a protection pad 3, a free fall sensor 5, a limit plate 6, a pad 7, a tooth plate 8, a transmission gear 9, a transmission rod 10, a connecting pipe 11, a pulley 12, a transmission belt 13, a shaft 14, a worm wheel 15, a worm 16, a servo motor 17, a driving rod 18, a limit plate 20, a toggle block 24, a strip through groove 25, a support rod 26, a spring 27 and a connecting block 28. Pads 7 are installed at the four corners of the body 1, and only three pads 7 are installed with free fall sensors 5, and a servo motor 17 is provided on the pad 7 without the free fall sensor 5 installed. The lower end of each pad 7 is connected to the shaft 14 with a bearing, and the middle part of each shaft 14 is keyed to a pulley 12, and the four pulleys 12 are connected by The transmission belt 13 is connected, and the transmission belt 13 is arranged on the outside of the inner support frame 4. The upper end bearing of the shaft rod 14 where the free fall sensor 5 is not arranged passes through the top of the corresponding pad 7, and the outer key of the upper end of the shaft rod 14 is connected with a worm wheel 15, and the outer side of the worm wheel 15 is meshingly connected with a worm 16, and the worm 16 is coaxially fixedly connected with the shaft end of the servo motor 17. The free fall sensor 5 senses the state of the body 1. When it is in a free fall state, it will quickly transmit the signal to the processor in the body 1, and then the processor immediately starts the servo motor 17, driving the worm 16 to rotate, and then driving the worm wheel 15 to rotate. Through the rotation of the worm wheel 15, the shaft rod 14 and the pulley 12 thereon can be rotated synchronously, thereby realizing the belt In order to rotate the transmission belt 13 connected to the wheel 12, four limit plates 20 are provided, and the four limit plates 20 are respectively arranged on the outside of the four surfaces of the transmission belt 13, the lower surface of the limit plate 20 is slidably connected to the inner bottom surface of the body 1, and the middle part of the limit plate 20 is fixedly connected to the outside of the transmission belt 13, and the middle part of the limit plate 20 is fixedly connected to the transmission belt 13, so that within a certain range, when the transmission belt 13 rotates, the limit plate 20 is driven to move horizontally, each limit plate 20 is provided with a strip through groove 25 at an equal angle, and each strip through groove 25 is fixedly connected with a support rod 26, each support rod 26 is movably passed through one end of the corresponding connecting block 28, and the other end of the connecting block 28 is fixedly connected to one side of the corresponding driving rod 18. When the limit plate 20 moves, the connecting block 28 will move relatively in the corresponding strip groove 25. When the connecting block 28 moves to the limit position in its corresponding strip groove 25, the limit plate 20 continues to move, and it will drive the corresponding driving rod 18 to move synchronously through the connecting block 28. The driving rod 18 is also provided with 4, and the lower surface of the driving rod 18 is also slidably connected to the inner bottom surface of the body 1. A spring 27 is provided on the outer side of each support rod 26, and the two ends of the spring 27 are respectively connected to one end of the strip groove 25 and the outer side of the corresponding connecting block 28. The connecting block 28 is evenly distributed with toggle blocks 24, and the position of the toggle block 24 is correspondingly provided with a tooth plate 8. The upper end of each tooth plate 8 is movably nested in the lower end of the corresponding limit plate 6.The upper end of the limit plate 6 is fixedly connected to the inner top surface of the body 1, and the side of each tooth plate 8 is meshedly connected with the corresponding transmission gear 9, and the transmission gear 9 is key-connected to the outer side of the corresponding transmission rod 10, and the outer end of the transmission rod 10 is fixedly connected to one end of the protective pad 3, and the inner end of the transmission rod 10 is movably extended to the inner side of one end of the corresponding connecting tube 11, and the other end of the connecting tube 11 is fixedly connected to the inner support frame 4. When the driving rod 18 moves, the toggle block 24 arranged thereon will move synchronously with it, thereby gradually squeezing the corresponding tooth plate 8, so that the tooth plate 8 Under the limiting action of the limiting plate 6, it moves upward. Since the tooth plate 8 is meshed with its corresponding transmission gear 9, it will drive the transmission rod 10 connected to the transmission gear 9 to rotate, that is, it can drive the protection pad 3 to rotate. The body 1 is evenly provided with through grooves that match the shape of the protection pad 3, and the position of the through groove corresponds to the position of the protection pad 3. The protection pad 3 is made of elastic plastic material, and the outer side of the protection pad 3 is provided with a rubber sleeve. The protection pad 3 is provided with two ends, namely, end a and end b, and two protection pads connected by two transmission rods 10 that are relatively close to each other. 3, respectively connected to the corresponding transmission rod 10 through end a and end b, the length of the protective pad 3 is not less than twice the thickness of the body 1, and the connection position of the transmission rod 10 and the protective pad 3 can be set so that the protective pads 3 at different positions can rotate clockwise and counterclockwise respectively, so as to protect the upper and lower sides of the body 1 at the same time, so that the body 1 can be effectively protected regardless of the falling angle. The structural shape of the toggle block 24 is an isosceles triangular prism, and the transmission belt 13 is a rectangular structure with arcs at the four corners, and the middle of the four sides thereof are respectively connected to the corresponding limit plates 20 The middle part of the side is fixedly connected, and the width of the transmission gear 9 is not less than 2 times the width of the tooth plate 8. Under the action of the ejection assembly, the transmission rod 10 will drive the protective pad 3 to extend out of the body 1. At this time, the width of the transmission gear 9 is set wider to avoid the transmission gear 9 and the tooth plate 8 from being staggered, ensuring that the tooth plate 8 can stably drive the transmission gear 9 to rotate when it moves. The shape of the toggle block 24 is set to be an isosceles triangular prism, which can facilitate the movement of the toggle block 24 and stably drive the tooth plate 8 to move along its axis, thereby ensuring that the tooth plate 8 can stably drive the transmission gear 9 to rotate. Embodiment 2:

[0021] In order to solve the problem that even if a protective structure is set up in the past, the portable communication terminal is not beautiful and not convenient for reuse, specifically, an ejection component is installed on the inner support frame 4, and the ejection component includes a spring 19, a groove 21, a spring sheet 22 and a ratchet pawl mechanism 23. The grooves 21 are evenly distributed on the limit plate 20, and a spring sheet 22 is set in each groove 21. The spring sheet 22 is connected to the lower end of the corresponding ratchet pawl mechanism 23, and the ratchet pawl mechanism 23 is set at the middle lower end of each transmission rod 10. Through the elasticity of the spring sheet 22, the ratchet pawl mechanism 23 can limit the moving direction, and then when protection is not needed, the transmission rod 10 is prevented from driving the protective pad 3 to move to the outside of the body 1. When protection is needed, the ratchet part and the pawl part on the ratchet pawl mechanism 23 are completely misaligned, so that the transmission rod 10 drives the protective pad 3 to move to the outside of the body 1 under the action of the spring 19. After the user picks up the fallen portable communication terminal, the free fall sensor 5 senses the state of the body 1 and determines that it is not in a free fall state. It quickly transmits the signal to the processor in the body 1, and then the processor immediately reverses the rotation of the servo motor 17 to reset the limit plate 20. Thereafter, the user manually rotates and presses the protective pad 3 to reset the protective pad 3, thereby achieving the purpose of repeated use of the protective component. In the process of pressing the protective pad 3 back, a clicking sound can be heard through the ratchet pawl mechanism 23, thereby achieving the purpose of decompression. By pressing the protective pad 3 back into the through groove set on the body 1, the protective component can be prevented from being exposed to the outside of the body 1, so that it is beautiful enough. The inner end of the connecting tube 11 is connected to the transmission rod 10 extending into it through a spring 19. The middle and rear parts of the transmission rod 10 and the structural shape of the connecting tube 11 are all semi-cylindrical, and the width of the ratchet pawl mechanism 23 is less than the length of the strip through groove 25.

[0022] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-protection portable communication terminal, comprising a body (1), an ejection component and a protection component, characterized in that: The body (1) is provided with a switch button (2), and a rectangular inner support frame (4) is provided on the inner side of the body (1), an ejection component is provided on the inner support frame (4), and a protection component is provided on the body (1).

2. A self-protection portable communication terminal according to claim 1, characterized in that: The protection assembly comprises a protection pad (3), a free fall sensor (5), a limit plate (6), a pad (7), a tooth plate (8), a transmission gear (9), a transmission rod (10), a connecting pipe (11), a pulley (12), a transmission belt (13), a shaft (14), a worm wheel (15), a worm (16), a servo motor (17), a driving rod (18), a limit plate (20), a toggle block (24), a strip-shaped through groove (25), a support rod (26), a second spring (27) and a connecting block (28). Pads (7) are installed at the four corners of the body (1), and only three pads (7) are installed with free fall sensors (5), and the pads (7) on which the free fall sensors (5) are not installed are provided with A servo motor (17) is arranged, the lower end of each pad (7) is connected to a shaft (14) by a bearing, and the middle part of each shaft (14) is keyed to a pulley (12), four pulleys (12) are connected by a transmission belt (13), and the transmission belt (13) is arranged on the outside of the inner support frame (4), the upper end bearing of the shaft (14) where the free fall sensor (5) is not arranged passes through the top of the corresponding pad (7), and the outer side key of the upper end of the shaft (14) is connected to a worm wheel (15), the outer side of the worm wheel (15) is meshedly connected to a worm (16), and the worm (16) is coaxially fixedly connected to the shaft end of the servo motor (17), and four limit plates (20) are arranged, and the four limit plates (20) are respectively arranged on the outside of the four surfaces of the transmission belt (13), the lower surface of the limit plate (20) is slidably connected to the inner bottom surface of the body (1), and the middle part of the limit plate (20) is fixedly connected to the outside of the transmission belt (13), and the middle part of the limit plate (20) is fixedly connected to the transmission belt (13), so that when the transmission belt (13) rotates within a certain range, the limit plate (20) is driven to move horizontally, each of the limit plates (20) is provided with a strip through groove (25) at an equal angle, and each of the strip through grooves (25) is fixedly connected to a support rod (26), each of the support rods (26) movably passes through one end of the corresponding connection block (28), and the other end of the connection block (28) is fixedly connected to the corresponding drive rod ( 18), four driving rods (18) are also provided, and the lower surface of the driving rod (18) is also slidably connected to the inner bottom surface of the body (1), and each of the support rods (26) is provided with a second spring (27) on the outer side, and the two ends of the second spring (27) are respectively connected to one end of the strip-shaped through groove (25) and the outer side of the corresponding connecting block (28), and the connecting block (28) is evenly distributed with a toggle block (24), and a tooth plate (8) is provided at the position corresponding to the toggle block (24), and the upper end of each tooth plate (8) is movably embedded in the lower end of the corresponding limit plate (6), and the upper end of the limit plate (6) is fixedly connected to the inner top surface of the body (1), and the side surface of each tooth plate (8) is meshedly connected with a corresponding transmission gear (9),The transmission gear (9) is key-connected to the outer side of the corresponding transmission rod (10), the outer end of the transmission rod (10) is fixedly connected to one end of the protective pad (3), and the inner end of the transmission rod (10) is movably extended into the inner side of one end of the corresponding connecting tube (11), and the other end of the connecting tube (11) is fixedly connected to the inner support frame (4).

3. A self-protection portable communication terminal according to claim 2, characterized in that: Through grooves matching the shape of the protective pad (3) are evenly arranged on the machine body (1), and the positions of the through grooves correspond one to one with the positions of the protective pad (3).

4. A self-protection portable communication terminal according to claim 3, characterized in that: The protective pad (3) is made of elastic plastic material, and a rubber sleeve is provided on the outer side of the protective pad (3). The protective pad (3) is provided with two ends, namely, end a and end b. Two protective pads (3) connected by two transmission rods (10) located relatively close to each other are respectively connected to the corresponding transmission rods (10) via end a and end b. The length of the protective pad (3) is not less than twice the thickness of the body (1).

5. A self-protection portable communication terminal according to claim 4, characterized in that: The structure shape of the toggle block (24) is an isosceles triangular prism.

6. A self-protection portable communication terminal according to claim 5, characterized in that: The transmission belt (13) is a rectangular structure with arc-shaped corners, and the middle portions of its four side surfaces are respectively fixedly connected to the middle portions of the side surfaces of the corresponding limiting plates (20).

7. A self-protection portable communication terminal according to claim 6, characterized in that: The ejection assembly comprises a spring (19), a groove (21), a spring sheet (22) and a ratchet pawl mechanism (23); the grooves (21) are evenly distributed on the limit plate (20), and a spring sheet (22) is arranged in each groove (21); the spring sheet (22) is connected to the lower end of the corresponding ratchet pawl mechanism (23), and the ratchet pawl mechanism (23) is arranged at the middle lower end of each transmission rod (10); the inner end of the connecting tube (11) is connected to the transmission rod (10) extending into the inner end thereof through the spring (19).

8. A self-protection portable communication terminal according to claim 7, characterized in that: The middle and rear parts of the transmission rod (10) and the connecting pipe (11) are all semi-cylindrical in shape.

9. A self-protection portable communication terminal according to claim 8, characterized in that: The width of the ratchet and pawl mechanism (23) is smaller than the length of the strip-shaped through slot (25).

10. A self-protection portable communication terminal according to claim 9, characterized in that: The width of the transmission gear (9) is not less than twice the width of the tooth plate (8).