A seat belt reminder device

Abstract

The present application belongs to the technical field of safety belt, and discloses a safety belt unfastening reminding device, which comprises a winding device, a belt and an end cover, the belt is wound on the winding device, the end cover is installed on the side end of the winding device, and a reminding judging mechanism is arranged on the end cover; the reminding judging mechanism comprises a gear cover and a speed reduction assembly, and the gear cover is arranged on the outside of the end cover. The reminding judging mechanism composed of the speed reduction assembly and the state detecting module is arranged on the side end of the winding device, the state detecting module changes the output signal when the belt is pulled to the set length, the problem that the traditional buckle sensor cannot judge whether the belt is truly pulled out for wearing and is easily cheated is solved, the effect that the belt is directly and reliably detected whether it is correctly pulled out for wearing instead of only detecting whether the lock tongue is inserted is achieved, the effect that the false safety belt is effectively prevented is achieved, and the reliability of the reminding device is improved.

Description

Technical Field

[0001] This invention relates to the field of seat belt technology, and in particular to a seat belt reminder device. Background Technology

[0002] As a crucial component of passive safety, car seat belts effectively reduce the risk of injury or death in collisions. At the moment of impact, seat belts securely hold the body in the seat, preventing occupants from being thrown into the interior or ejected from the vehicle due to inertia. Data shows that unbelted occupants account for up to 60% of fatal collisions. Seat belt reminder devices provide visual and audible cues, reminding occupants to fasten their seat belts promptly, reducing instances of not wearing seat belts due to negligence or complacency, and effectively promoting the good habit of seat belt use. Seat belt regulations in most countries explicitly require vehicles to be equipped with seat belt reminder devices. Therefore, improving the reliability, accuracy, and durability of seat belt reminders is of great significance. Currently, the mainstream seat belt reminder device is located at the buckle.

[0003] Most vehicles currently equipped with buckle-type unfastened seatbelt reminders, which determine whether the seatbelt is fastened by checking if the seatbelt latch is inserted into the buckle. However, buckle-type unfastened seatbelt reminders are extremely easy to bypass. Some people with low safety awareness can simply insert an unused latch, or even stuff in a tissue or card, to fool the buckle-side sensor and disable the reminder function. Moreover, the sensor is located inside the buckle and is constantly exposed in the seat gaps, making it susceptible to malfunction or false alarms due to liquid spills, dust accumulation, or foreign objects falling in. In addition, patent number 202223330809.X proposes a seatbelt unfastened reminder device that adds an elastic contact switch to the webbing, judging the webbing pull-out status by changes in the thickness of the webbing on the retractor. However, this device is constantly in contact with the webbing, resulting in poor durability; and as the webbing and the abutment wear down, the length of the webbing pulled out when the switch is activated will also shift, reducing accuracy. Summary of the Invention

[0004] To overcome the technical defects of existing technologies, this invention provides a seat belt unfastened reminder device. It determines whether a passenger is using the seat belt correctly by detecting whether the retractor and webbing are in a designated position. Compared with traditional buckle-type unfastened reminder devices, it has the advantages of high durability and accurate recognition. When used in conjunction with buckle-type unfastened reminder devices, it can avoid problems such as false fastening and false alarms, further improving the reliability of the seat belt unfastened reminder device.

[0005] The technical solution adopted in this invention is: a seatbelt unfastened reminder device, including a retractor, a webbing, and an end cap. The webbing is wound around the retractor, and the end cap is installed on the side of the retractor. The end cap is provided with a reminder judgment mechanism. The reminder judgment mechanism includes a gear cover and a reduction assembly. The gear cover is located outside the end cap, and the reduction assembly is located in the cavity formed by the gear cover and the end cap. The reduction assembly is drivenly connected to a shaft on the retractor. The reminder judgment mechanism also includes a status detection module, which cooperates with the output end of the reduction assembly. The status detection module is used to detect the pulled-out length of the webbing and output a status signal. When the webbing is pulled, the shaft of the retractor drives the reduction assembly to move. When the webbing is pulled to a set length, the output end of the reduction assembly drives the status detection module, causing the output signal of the status detection module to change the status of the seatbelt unfastened reminder device.

[0006] Preferably, the state detection module is a mechanical triggering component, which includes an electronic switch and a movable rack installed on the inner wall of the gear cover. The gear cover has an intermediate gear located between the electronic switch contact and one end of the rack.

[0007] Preferably, the reduction assembly includes an internal gear and an external gear. The outer edge of the internal gear has two external teeth. One end of the middle gear can mesh with the external teeth, and the other end meshes with the rack.

[0008] Preferably, the outer teeth of the internal gear are in a missing tooth state. When the outer teeth of the internal gear are not engaged with the intermediate gear, the intermediate gear and the rack are in a stopped state, and the contacts of the electronic switch will maintain the current state. When the outer teeth of the internal gear are engaged with the intermediate gear, the intermediate gear will drive the rack to move. The rack has a push rod on its outer side and a pin groove at its bottom, with a limit pin installed in the pin groove.

[0009] Preferably, the inner edge of the end cap is provided with multiple snap-fit ​​grooves, and the gear cover is provided with elastic snap-fit ​​blocks that match and snap into the multiple snap-fit ​​grooves.

[0010] Preferably, the inner wall of the gear cover is provided with three elastic locking pins and a T-shaped groove. The electronic switch and the intermediate gear are respectively provided with through holes that match the corresponding elastic locking pins. The rack is provided with a T-shaped pin that can pass through the T-shaped groove. The inner wall of the gear cover is provided with a limiting plate and a limiting groove for limiting the rack. After the limiting pin is installed on the rack, it can be locked with the limiting plate and the limiting groove when the rack reaches the preset position. The top of the limiting pin is provided with a spring piece. When the rack is subjected to a reverse driving force, the limiting pin is squeezed and the spring piece is compressed, thereby releasing the locking state.

[0011] Preferably, the state detection module is a sensor detection component, which includes a resistive patch disposed on the outer side wall of the external gear, and a resistance position sensor that cooperates with the resistive patch is installed on the inner wall of the gear cover.

[0012] Preferably, the deceleration assembly further includes a pinion, the shaft of the retractor passes through the end cover and is connected to the middle of the pinion, the outer side of the pinion is provided with an outer gear ring, the outer gear is provided with a large end gear ring and a small end gear ring, the inner gear is provided with an inner gear ring, the outer gear ring of the pinion meshes with the large end gear ring of the outer gear, and the small end gear ring of the outer gear meshes with the inner gear ring of the inner gear.

[0013] Preferably, the inner wall edge of the internal gear is provided with a limiting ring groove, the inner wall of the gear cover is provided with a limiting open ring and a positioning open ring concentrically, the outer edge of the limiting open ring is provided with an elastic limiting block that matches the limiting ring groove, the inner wall of the gear cover is provided with a positioning post concentrically aligned with the positioning open ring, the end of the pinion is provided with a positioning groove that matches the positioning post, and the inner wall of the gear cover is also provided with a positioning connecting post that connects to the external gear.

[0014] The beneficial effects of this invention are: 1. By setting a reminder judgment mechanism on the side of the retractor, which consists of a deceleration component and a status detection module, the status detection module changes its output signal when the webbing is pulled to a set length, driven by the output end of the deceleration component. This solves the problem that traditional buckle sensors cannot determine whether the webbing has been properly pulled out and worn, and are easily deceived. It achieves the effect of directly and reliably detecting whether the webbing has been properly pulled out and worn, rather than just detecting whether the locking tongue has been inserted, thereby effectively preventing false fastening of the seat belt and improving the reliability of the reminder device. 2. By using a multi-stage reduction assembly consisting of a pinion, an external gear, and an internal gear meshing together, the problems of long webbing pull-out stroke and limited space in the detection mechanism, as well as the direct detection accuracy being affected by webbing wear and stretching, are solved. This achieves the effect of accurately converting the linear displacement of the webbing into the limited angular displacement of the gears, making the detection accuracy only related to the fixed gear speed ratio, thereby achieving high-precision and long-life detection. 3. By using a mechanical triggering assembly consisting of the outer teeth of the internal gear, the intermediate gear, the rack, and the electronic switch, there is no contact wear in the non-triggering state. This solves the technical problem of achieving simple and low-cost state switching while ensuring high reliability and strong anti-interference capability, and achieves the effect of precise and reliable triggering of the electronic switch. 4. By cooperating with the resistive patch on the external gear and the resistive position sensor on the gear cover, the problems of contact wear and only providing switching signals in the mechanical triggering method are solved. This achieves contactless, long-life sensing of the webbing position and can provide a continuous signal of the webbing pull-out length, thus improving the system's judgment accuracy. 5. By integrating the entire reminder judgment mechanism into the cavity formed by the retractor end cover and gear cover, the problem of buckle-type sensors being exposed to seat gaps for a long time and being susceptible to dust and liquid corrosion, leading to failure or false alarms, is solved. This achieves the effect of placing the core detection element in a protected closed environment, significantly improving the device's environmental adaptability and operational stability. 6. The connection structure, through the interlocking groove on the inner edge of the end cap and the elastic locking block on the gear cover, solves the problem of the need for the reminder judgment mechanism to be quickly and conveniently assembled with the retractor. This achieves the effect of stable installation without the need for screws or other fasteners, simplifying the production and maintenance process and reducing manufacturing costs. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a schematic diagram of an embodiment 1 of the seatbelt reminder device of the present invention; Figure 2 This is an exploded view of an embodiment 1 of the seatbelt reminder device of the present invention; Figure 3 This is a schematic diagram of the mechanical triggering component structure of a seatbelt unfastened reminder device according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the external tooth structure of the internal gear in Embodiment 1 of the seatbelt unfastened reminder device of the present invention; Figure 5 This is a schematic diagram of the large-end gear ring and small-end gear ring of the external gear in Embodiment 1 of the seat belt unfastened reminder device of the present invention; Figure 6 This is a schematic diagram of the rack structure of Embodiment 1 of the seatbelt unfastened reminder device of the present invention; Figure 7 This is an exploded view of an embodiment 2 of the seatbelt reminder device of the present invention; Figure 8 This is a schematic diagram of the inner gear ring structure of the internal gear of the seat belt unfastened reminder device according to the present invention; Figure 9 This is a schematic diagram of the internal structure of the gear cover of a seatbelt unfastened reminder device according to the present invention; Figure 10 This is a schematic diagram of the limiting pin and spring sheet structure of a seatbelt unfastened reminder device according to the present invention; Figure 11 This is a schematic diagram of the connection structure between the pinion and the outer gear ring of a seatbelt reminder device according to the present invention.

[0017] Explanation of reference numerals in the attached diagram: 1. Retractor; 2. Webbing; 3. End cap; 4. Warning and judgment mechanism; 5. Gear cover; 6. Reduction assembly; 7. Shaft; 8. Status detection module; 9. Electronic switch; 10. Intermediate gear; 11. Rack; 12. Internal gear; 13. External gear; 14. External gear; 15. Limit pin; 16. Push rod; 17. Resistor patch; 18. Resistor position sensor; 19. Pinion; 20. External gear. 21. Side gear ring; 22. Large end gear ring; 23. Small end gear ring; 24. Inner gear ring; 25. T-pin; 26. T-slot; 27. Spring piece; 28. Snap-fit ​​groove; 29. ​​Elastic snap block; 30. Elastic snap post; 31. Limiting plate; 32. Limiting groove; 33. Pin groove; 34. Limiting ring groove; 35. Limiting open ring; 36. Positioning open ring; 37. Elastic limiting block; 38. Positioning post; 39. Positioning groove; 30. Positioning connecting post. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0019] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, this embodiment provides a seatbelt unfastened reminder device, including a retractor 1, a webbing 2, and an end cap 3. The webbing 2 is wound around the retractor 1, and the end cap 3 is fixedly installed on the side end of the retractor 1 by a pin. The end cap 3 is provided with a reminder judgment mechanism 4. The reminder judgment mechanism 4 includes a gear cover 5 and a reduction assembly 6. The gear cover 5 is located on the outside of the end cap 3, and the reduction assembly 6 is located in the cavity formed by the gear cover 5 and the end cap 3. The reduction assembly 6 is drively connected to a shaft 7 provided on the retractor 1. The reminder judgment mechanism 4 also includes a status detection module 8, which cooperates with the output end of the reduction assembly 6. The status detection module 8 is used to detect the pulled-out length of the webbing 2 and output a status signal. When the webbing 2 is pulled, the retractor 1... The shaft 7 drives the deceleration assembly 6 to move. When the webbing 2 is pulled to the set length, the output end of the deceleration assembly 6 drives the status detection module 8, causing the output signal of the status detection module 8 to change the status of the seat belt unfastened reminder device. Through the reminder judgment mechanism 4, which is set on the side of the retractor 1 and consists of the deceleration assembly 6 and the status detection module 8, the status detection module 8 changes its output signal when the webbing 2 is pulled to the set length, driven by the output end of the deceleration assembly 6. This solves the problem that traditional buckle sensors cannot determine whether the webbing 2 has been properly pulled out and worn, and are easily deceived. It achieves the effect of directly and reliably detecting whether the webbing 2 has been properly pulled out and worn, rather than just detecting whether the locking tongue has been inserted, thereby effectively preventing "false" seat belt fastening and improving the reliability of the reminder device.

[0020] The state detection module 8 is a mechanical triggering component, which includes an electronic switch 9 installed on the inner wall of the gear cover 5 and a movable rack 11. The gear cover 5 has an intermediate gear 10 located between the contact of the electronic switch 9 and one end of the rack 11. The triggering force is transmitted through the rotatable intermediate gear 10. When the output shaft of the deceleration component 6 rotates to a specific position, it will push the rack 11. The rack 11 triggers the contact of the electronic switch 9 to complete the switching of the circuit signal. The mechanical structure has strong anti-interference ability and is not easily affected by the electromagnetic environment. It has the characteristics of simple structure, low cost, fast response and reliable physical triggering.

[0021] The reduction assembly 6 includes an internal gear 12 and an external gear 13. The outer edge of the internal gear 12 is provided with external teeth 14. One end of the intermediate gear 10 can mesh with the external teeth 14, and the other end can mesh with the rack 11. The external teeth 14 of the internal gear 12 are in a missing tooth state. When the external teeth 14 of the internal gear 12 are not meshed with the intermediate gear 10, the intermediate gear 10 and the rack 11 are in a stopped state, and the contacts of the electronic switch 9 will maintain the current state. When the external teeth 14 of the internal gear 12 mesh with the intermediate gear 13, the intermediate gear 13... The 0 will drive the rack 11 to move, thereby changing the state of the contacts of the electronic switch 9. When the webbing is retracted and the internal gear 12 rotates in the opposite direction, the external gear 14 meshes with the intermediate gear 10 again and drives the rack 11 to move in the opposite direction, so that the contacts of the electronic switch 9 return to the initial state. The rack 11 is provided with a push rod 16 on the outside and a pin groove 32 at the bottom. A limit pin 15 is installed in the pin groove 32, which realizes precise position triggering and stable state maintenance. This structure converts rotational motion into reliable linear triggering action and provides precise transmission.

[0022] The end cover 3 has multiple snap-fit ​​grooves 27 on its inner edge, and the gear cover 5 has elastic snap-fit ​​blocks 28 that match and snap-fit ​​with the multiple snap-fit ​​grooves 27. By snapping the elastic snap-fit ​​blocks 28 on the gear cover 5 with the snap-fit ​​grooves 27 on the inner edge of the end cover 3, quick assembly and convenient disassembly are achieved without the need for screws or other fasteners, which simplifies the production and maintenance process and reduces assembly costs.

[0023] The inner wall of the gear cover 5 is provided with three elastic locking pins 29 and a T-shaped groove 25. The electronic switch 9 and the intermediate gear 10 are respectively provided with through holes that match the corresponding three elastic locking pins 29. The rack 11 is provided with a T-shaped pin 24 that can pass through the T-shaped groove 25. The inner wall of the gear cover 5 is provided with a limiting plate 30 and a limiting groove 31 for limiting the rack 11. After the limiting pin 15 is installed on the rack 11, it can be locked with the limiting plate 30 and the limiting groove 31 when the rack 11 reaches the preset position. The top of the limiting pin 15 is provided with a spring piece 26. When the rack 11 is subjected to a reverse driving force, the limiting pin 15 is squeezed, which compresses the spring piece 26, thereby releasing the locking state. The setting of the limiting plate 30 and the limiting groove 31 prevents the rack 11 from overtraveling and protects the mechanism.

[0024] Example 2, as Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the difference from Embodiment 1 is that the state detection module 8 is a sensor detection component. The sensor detection component includes a resistive patch 17 disposed on the outer side wall of the external gear 13, and a resistance position sensor 18 that cooperates with the resistive patch 17 is installed on the inner wall of the gear cover 5. When the external gear 13 rotates, the resistive patch 17 on the outer side of the external gear 13 rotates accordingly. The resistance position sensor 18 detects the change in resistance value relative to the resistive patch 17 to accurately sense the rotation angle of the external gear 13, thereby calculating the real-time pull-out length of the webbing 2 and outputting a continuous signal. There are no mechanical contacts, which improves the service life and can provide feedback on the specific pull-out length of the webbing 2.

[0025] Specifically, such as Figure 5 , Figure 8 and Figure 11 As shown, the reduction assembly 6 also includes a pinion 19. The shaft 7 of the retractor 1 passes through the end cover 3 and is connected to the middle of the pinion 19. An outer gear ring 20 is provided on the outer side of the pinion 19. A large end gear ring 21 and a small end gear ring 22 are provided on the outer gear 13. An inner gear ring 23 is provided on the inner gear 12. The outer gear ring 20 of the pinion 19 meshes with the large end gear ring 21 of the outer gear 13, and the small end gear ring 22 of the outer gear 13 meshes with the inner gear ring 23 of the inner gear 12. The pinion 19 and the outer gear... The multi-stage reduction gear composed of gear 13 and internal gear 12 achieves a high reduction ratio, condensing the several-meter pull-out stroke of the webbing 2 into less than one rotation of the internal gear 12. It features a compact structure and high detection accuracy, solving the problems of long pull-out stroke of the webbing 2 and limited space in the detection mechanism, as well as the direct detection accuracy being affected by wear and stretching of the webbing 2. It achieves the effect of accurately converting the linear displacement of the webbing 2 into the finite angular displacement of the gear, making the detection accuracy only related to the fixed gear speed ratio, thereby achieving high-precision and long-life detection.

[0026] Specifically, such as Figure 9 and Figure 11 As shown, the inner wall edge of the internal gear 12 is provided with a limiting ring groove 33, the inner wall of the gear cover 5 is provided with a limiting open ring 34 and a positioning open ring 35 concentrically, the outer edge of the limiting open ring 34 is provided with an elastic limiting block 36 that matches the limiting ring groove 33, the inner wall of the gear cover 5 is provided with a positioning post 37 concentrically with the positioning open ring 35, the end of the pinion 19 is provided with a positioning groove 38 that matches the positioning post 37, and the inner wall of the gear cover 5 is also provided with a positioning connecting post 39 that connects to the external gear 13. This realizes the axial and radial positioning of the internal gear 12, pinion 19 and external gear 13 in the gear cover 5, preventing the gears from moving or disengaging during operation, and ensuring the smoothness and reliability of the transmission.

[0027] During operation, when the driver or passenger pulls out the webbing 2, it drives the shaft 7 of the retractor 1 to rotate. The shaft 7 drives the deceleration component 6 in the warning and judgment mechanism 4 to operate. The deceleration component 6 pulls the webbing 2 out a longer straight stroke and precisely converts it into a limited angle rotation of the output end (such as the internal gear 12) according to a fixed transmission ratio. When the webbing 2 is pulled out to the set length (corresponding to the length required for the occupant to wear it correctly), the output end of the deceleration component 6 rotates to the preset position and drives the status detection module 8, causing the output signal of the status detection module 8 to change (such as from unfastened to fastened), thereby transmitting the status signal to the vehicle's alarm system or controller.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A seatbelt unfastened reminder device, comprising a retractor (1), a webbing (2), and an end cap (3), wherein the webbing (2) is wound around the retractor (1), and the end cap (3) is mounted on the side end of the retractor (1), characterized in that: The end cap (3) is provided with a reminder and judgment mechanism (4); The reminder judgment mechanism (4) includes a gear cover (5) and a deceleration assembly (6). The gear cover (5) is located on the outside of the end cover (3), and the deceleration assembly (6) is located in the cavity formed by the gear cover (5) and the end cover (3). The deceleration assembly (6) is connected to the shaft (7) provided on the retractor (1) for transmission. The reminder judgment mechanism (4) also includes a status detection module (8), which is in cooperation with the output end of the deceleration component (6). The status detection module (8) is used to detect the pull-out length of the webbing (2) and output a status signal. When the webbing (2) is pulled, the shaft (7) of the retractor (1) drives the deceleration assembly (6) to move. When the webbing (2) is pulled to the set length, the output end of the deceleration assembly (6) drives the status detection module (8), so that the output signal of the status detection module (8) changes the status of the seat belt unfastened reminder device.

2. The seatbelt unfastened reminder device according to claim 1, characterized in that: The state detection module (8) is a mechanical triggering component, which includes an electronic switch (9) installed on the inner wall of the gear cover (5) and a movable rack (11). The gear cover (5) has an intermediate gear (10) located between the contact of the electronic switch (9) and one end of the rack (11).

3. A seatbelt unfastened reminder device according to claim 2, characterized in that: The deceleration assembly (6) includes an internal gear (12) and an external gear (13). The outer edge of the internal gear (12) is provided with external teeth (14). One end of the intermediate gear (10) can mesh with the external teeth (14), and the other end meshes with the rack (11).

4. A seatbelt unfastened reminder device according to claim 3, characterized in that: The outer teeth (14) of the inner gear (12) are missing teeth. When the outer teeth (14) of the inner gear (12) are not meshed with the intermediate gear (10), the intermediate gear (10) and the rack (11) are in a stopped state, and the contacts of the electronic switch (9) will maintain the current state. When the outer teeth (14) of the inner gear (12) are meshed with the intermediate gear (10), the intermediate gear (10) will drive the rack (11) to move. The rack (11) has a push rod (16) on its outer side and a pin groove (32) at its bottom. A limit pin (15) is installed in the pin groove (32).

5. A seatbelt unfastened reminder device according to claim 1, characterized in that: The end cap (3) has multiple snap-fit ​​grooves (27) on its inner edge, and the gear cover (5) has elastic snap-fit ​​blocks (28) that match and snap-fit ​​the multiple snap-fit ​​grooves (27).

6. A seatbelt unfastened reminder device according to claim 4, characterized in that: The inner wall of the gear cover (5) is provided with three elastic locking pins (29) and a T-shaped groove (25). The electronic switch (9) and the intermediate gear (10) are respectively provided with through holes that match the corresponding elastic locking pins (29). The rack (11) is provided with a T-shaped pin (24) that can pass through the T-shaped groove (25). The inner wall of the gear cover (5) is provided with a limiting plate (30) and a limiting groove (31) for limiting the rack (11). After the limiting pin (15) is installed on the rack (11), it can be locked in conjunction with the limiting plate (30) and the limiting groove (31) when the rack (11) reaches the preset position. The top of the limiting pin (15) is provided with a spring piece (26). When the rack (11) is subjected to a reverse driving force, the limiting pin (15) is squeezed, causing the spring piece (26) to be compressed, thereby releasing the locking state.

7. A seatbelt unfastened reminder device according to claim 1, characterized in that: The state detection module (8) is a sensor detection component, which includes a resistive patch (17) disposed on the outer side wall of the external gear (13), and a resistance position sensor (18) that cooperates with the resistive patch (17) is installed on the inner wall of the gear cover (5).

8. A seatbelt unfastened reminder device according to any one of claims 1-7, characterized in that: The deceleration assembly (6) also includes a pinion (19). The shaft (7) of the retractor (1) passes through the end cover (3) and is connected to the middle of the pinion (19). The outer side of the pinion (19) is provided with an outer gear ring (20). The outer gear (13) is provided with a large end gear ring (21) and a small end gear ring (22). The inner gear (12) is provided with an inner gear ring (23). The outer gear ring (20) of the pinion (19) meshes with the large end gear ring (21) of the outer gear (13). The small end gear ring (22) of the outer gear (13) meshes with the inner gear ring (23) of the inner gear (12).

9. A seatbelt unfastened reminder device according to claim 8, characterized in that: The inner wall edge of the internal gear (12) is provided with a limiting ring groove (33), the inner wall of the gear cover (5) is provided with a limiting ring (34) and a positioning ring (35) with the same center, the outer edge of the limiting ring (34) is provided with an elastic limiting block (36) that matches the limiting ring groove (33), the inner wall of the gear cover (5) is provided with a positioning post (37) with the same center as the positioning ring (35), the end of the pinion (19) is provided with a positioning groove (38) that matches the positioning post (37), and the inner wall of the gear cover (5) is also provided with a positioning connecting post (39) that connects to the external gear (13).

Images