Safety belt retractor and automobile seat

Abstract

According to the safety belt retractor and the automobile seat, a convex gear disc rotates to a first position and a second position correspondingly, so that a swing arm is separated from a ratchet wheel assembly to be in an unlocking state and makes contact with the ratchet wheel assembly to be in a locking state. When the convex gear disc rotates to the first position, the convex gear disc abuts against the swing arm, a car sensing ball of the car sensing assembly does not work, even if a car seat backrest is put down, the device can pull out a braid by a certain distance, then the car sensing assembly works, and therefore the putting-down function is achieved. In addition, when the locking piece drives the connecting assembly to rotate in the first direction, the locking end of the locking piece is driven to be separated from a convex gear of the vehicle sensing assembly, and the vehicle sensing assembly is in an unlocked state. When the driving connecting assembly rotates in the second direction, the locking end of the locking piece is driven to make contact with a convex gear of the vehicle sensing assembly, the vehicle sensing assembly is in the locking state, and therefore the seat cannot be locked in the large-angle adjusting process, and the braid can be normally pulled out or retracted.

Description

Technical Field

[0001] The present application relates to the field of automobile safety technology, and in particular to a seat belt retractor and also to an automobile seat. Background Art

[0002] With the continuous improvement of people's living standards, cars have become an indispensable means of transportation, and people's demand for car comfort is also increasing. Seats are a key component of the vehicle's safety system. Currently, some vehicle seats feature zero-gravity seating, wide-angle adjustment, and even full reclining. However, existing zero-gravity seats are prone to locking their seatbelt retractors during wide-angle adjustment, making it difficult to extend or retract the seatbelt, impacting passenger safety.

[0003] Therefore, there is an urgent need for a seat belt retractor that can prevent the seat belt retractor from being directly locked during a large-angle seat adjustment process, causing the webbing to be difficult to pull out or directly stuck. Utility Model Content

[0004] This application provides a seat belt retractor to solve the technical problem in the prior art of preventing the seat belt retractor from directly locking during large-angle seat adjustment, resulting in the webbing being difficult to pull out or being directly stuck. This application also provides a car seat using the seat belt retractor.

[0005] The present application provides a seat belt retractor, comprising a retractor body provided on a car seat, a mechanical plate, a spindle and a locking cover provided on the retractor body, a ratchet assembly provided on the inner side of the mechanical plate, a vehicle sensing assembly provided in a vehicle sensing accommodation structure of the mechanical plate, and a counterweight and a swing arm connected to the vehicle sensing assembly, and further comprising: a position limiting support structure, a convex gear plate, a drive connection assembly and a locking member;

[0006] The position-limiting support structure is provided on the first end surface of the mechanical plate; the first end surface of the mechanical plate is the end surface of the mechanical plate facing the locking cover;

[0007] The convex gear plate is slidably connected to the position-limiting support structure, and when rotated to a first position, presses against the swing arm, so that the swing arm is separated from the ratchet assembly to be in an unlocked state; and when rotated to a second position, releases the swing arm, so that the swing arm contacts the ratchet assembly to be in a locked state;

[0008] The drive connection assembly is connected between the core shaft and the convex gear plate, so as to drive the convex gear plate to rotate through the drive connection assembly under the drive of the core shaft;

[0009] The connecting end of the locking member is connected to the drive connection assembly, and the locking end of the locking member is arranged opposite to the convex gear of the vehicle sensing assembly, so that when the drive connection assembly rotates in a first direction, the locking end of the locking member is driven to separate from the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in an unlocked state; and when the drive connection assembly rotates in a second direction, the locking end of the locking member is driven to contact the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in a locked state, and the webbing can be pulled out or reeled under the rotation angle of the car seat.

[0010] Optionally, the drive connection assembly includes a first connecting gear shaft, a support pillow block and a second connecting gear shaft;

[0011] The first connecting gear shaft is connected to the connecting end of the core shaft and is located on the first end surface of the mechanical plate;

[0012] The support pillow is arranged on the first end surface of the mechanical plate and is located on the side of the center of the mechanical plate;

[0013] The second connecting gear shaft is movably arranged on the support shaft platform, and the second connecting gear shaft includes a first-stage gear shaft, and the first-stage gear shaft is meshedly connected with the gear shaft of the first connecting gear shaft.

[0014] Optionally, the locking member includes a locking steel wire rod, and the locking steel wire rod includes an integrally formed ring-shaped connecting ring and an L-shaped connecting arm;

[0015] The ring-shaped connecting ring is sleeve-connected to the first connecting gear shaft to rotate synchronously with the first connecting gear shaft; the connecting ring is the connecting end of the locking member;

[0016] The L-shaped connecting arm is arranged opposite to the convex gear and can be in contact with or separated from the convex gear. The connecting arm is the locking end of the locking member.

[0017] Optionally, a limit stopper is further included, wherein the limit stopper is provided on the mechanical plate and is located on the line connecting the first connecting gear shaft and the convex gear;

[0018] The number of the limit blocks is two, and the two limit blocks are distributed along the circumference of the mechanical plate, and the locking steel wire rod is limited in the limit gap between the two limit blocks.

[0019] Optionally, the position-limiting support structure includes: a support position-limiting ring and a position-limiting body;

[0020] The support limiting ring is arranged around the center of the mechanical plate on the first end surface of the mechanical plate, and the connecting sliding groove is in sliding connection with the support limiting ring;

[0021] The limiting body is arranged on the first end surface of the mechanical plate and is located outside the supporting limiting ring;

[0022] The convex gear plate is slidably connected to the support limiting ring and is confined between the support limiting ring and the limiting body.

[0023] Optionally, the limiting support structure also includes: an anti-interference protrusion, which is arranged on the first end surface of the mechanical plate, and the protrusion height of the anti-interference protrusion is higher than the protrusion height of the support limiting ring, the limiting body and the drive connection assembly arranged on the first end surface of the mechanical plate; the anti-interference protrusion is used to prevent the locking cover from pressing down to interfere with the drive connection assembly, the convex gear plate and the locking member.

[0024] Optionally, the limiting support structure further includes a foot-picking structure, and at least two of the foot-picking structures are provided, and at least two of the foot-picking structures are spaced apart and arranged on the support limiting ring.

[0025] Optionally, the convex gear plate includes a ring-shaped body, a connecting groove, a limiting protrusion and a gear ring;

[0026] The connecting slot is provided on one side of the ring-shaped body facing the first end surface of the mechanical plate;

[0027] The limiting protrusion is provided on the outer peripheral side of the ring-shaped body, and the limiting protrusion is provided on the outer peripheral side of the ring-shaped body in the radial direction of the ring-shaped body; when the ring-shaped body rotates to the first position, the limiting protrusion presses the swing arm, so that the swing arm is separated from the ratchet assembly to be in an unlocked state; and when the ring-shaped body rotates to the second position, the swing arm is released, so that the swing arm contacts the ratchet assembly to be in a locked state;

[0028] The gear ring is arranged on the inner circumference side of the ring-shaped main body, and the rack of the gear ring is meshed and connected with the second-stage gear shaft of the second connecting gear shaft.

[0029] Optionally, the swing arm is movably arranged on the mechanical plate and located at the side of the vehicle sensing accommodating structure, and can be rotated under the driving of the vehicle sensing arm of the vehicle sensing assembly;

[0030] The swing arm includes an abutting arm and a locking arm, the abutting arm and the locking arm are respectively arranged toward the convex gear plate, the abutting arm can abut against the limiting protrusion, and the locking arm abuts against the wheel assembly;

[0031] When the webbing is not restraining the human body, the webbing does not drive the core shaft to rotate, and the limiting protrusion contacts the abutting arm of the swing arm to inhibit the swing arm from swinging; at the same time, the counterweight drives the vehicle sensing component to rotate by its own gravity, so that the vehicle sensing ball of the vehicle sensing component is always in a horizontal position when the retractor body rotates with the car seat, and the webbing can be pulled out or rewound at the rotation angle of the car seat;

[0032] When the webbing restrains the human body, the webbing drives the core shaft to rotate, and drives the limiting protrusion to rotate to form a swingable space relative to the swing arm; at the same time, the vehicle sensing ball has an inertial force when the vehicle sensing component is locked and swings through the inertial force, so as to drive the swing arm to swing in the swing space to contact the ratchet assembly to be in a locked state.

[0033] The present application also provides a car seat, which includes any one of the above-mentioned seat belt retractors.

[0034] Compared with the prior art, this application has the following advantages:

[0035] The present application provides a seat belt retractor, comprising a retractor body arranged on a car seat, a mechanical plate, a core shaft and a locking cover arranged on the retractor body, a ratchet assembly arranged on the inner side of the mechanical plate, a vehicle sensing assembly arranged in a vehicle sensing accommodating structure of the mechanical plate, and a counterweight and a swing arm connected to the vehicle sensing assembly, the seat belt retractor further comprising: a limiting support structure, a convex gear plate, a drive connection assembly and a locking member; the limiting support structure is arranged on a first end face of the mechanical plate; the first end face of the mechanical plate is the end face of the mechanical plate facing the locking cover; the convex gear plate is slidably connected to the limiting support structure, and when rotated to a first position, presses the swing arm, so that the swing arm is separated from the ratchet assembly to be in an unlocked state; and releases the swing arm when rotated to a second position. The swing arm is brought into contact with the ratchet assembly to be in a locked state; the drive connection assembly is connected between the core shaft and the convex gear plate, so that the convex gear plate is driven to rotate through the drive connection assembly under the drive of the core shaft; the connecting end of the locking member is connected to the drive connection assembly, and the locking end of the locking member is arranged opposite to the convex gear of the vehicle sensing assembly, so that when the drive connection assembly rotates in a first direction, the locking end of the locking member is driven to separate from the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in an unlocked state; when the drive connection assembly rotates in a second direction, the locking end of the locking member is driven to contact the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in a locked state; and the webbing can be pulled out or reeled under the rotation angle of the car seat.

[0036] The seatbelt retractor provided herein rotates a convex gear disc to corresponding first and second positions, thereby causing a swing arm to separate from a ratchet assembly, thereby unlocking the seatbelt, and to engage with the ratchet assembly, thereby locking the seatbelt. When the convex gear disc is rotated to the first position, it presses against the swing arm, disengaging the vehicle sensing ball of the vehicle sensing assembly. Even after the car seat back is folded down, the retractor can pull the webbing a certain distance before the vehicle sensing function takes effect, thereby satisfying the folding function without affecting the retractor's other functions. Furthermore, when the drive connection assembly rotates in the first direction, the locking member drives the locking end of the locking member to separate from the convex gear of the vehicle sensing assembly, thereby unlocking the vehicle sensing assembly. When the drive connection assembly rotates in the second direction, the locking end of the locking member drives the locking end to engage with the convex gear of the vehicle sensing assembly, thereby locking the vehicle sensing assembly. This prevents locking during wide-angle seat adjustment, allowing the webbing to be properly extended or retracted, thereby ensuring passenger safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural schematic diagram of a seat belt retractor provided in an embodiment of the present application.

[0038] Figure 2 It is a structural schematic diagram of some components of the seat belt retractor provided in an embodiment of the present application.

[0039] Figure 3 This is an exploded view of a seat belt retractor provided in an embodiment of the present application.

[0040] Figure 4 It is a structural diagram of the vehicle sensing component provided in an embodiment of the present application.

[0041] Figure 5 It is a schematic structural diagram of the locking member provided in an embodiment of the present application.

[0042] Figure 6 It is a schematic diagram of the locking state of the locking member and the convex gear provided in an embodiment of the present application.

[0043] Figure 7 This is a schematic diagram of the unlocked state of the locking member and the convex gear provided in an embodiment of the present application.

[0044] Figure 8 This is a schematic diagram of the state in which the convex gear plate provided in an embodiment of the present application abuts against the swing arm.

[0045] Figure 9 It is a structural schematic diagram of the convex gear plate provided in an embodiment of the present application.

[0046] Figure 10 This is a structural diagram of the drive connection assembly and the locking member provided in an embodiment of the present application installed on a mechanical plate.

[0047] Figure 11 It is a structural schematic diagram of the mechanical plate provided in an embodiment of the present application.

[0048] Reference numerals:

[0049] Retractor body 1, core shaft 11, locking cover 12, mechanical plate 2, vehicle sensor accommodating structure 21, vehicle sensor assembly 3, vehicle sensor fixing seat 31, vehicle sensor body 32, vehicle sensor arm 33, convex gear 34, counterweight 35, limiting support structure 4, support limiting ring 41, limiting body 42, anti-interference protrusion 43, protrusion 431, foot-picking structure 44, convex gear plate 5, ring-shaped body 51, limiting protrusion 52, gear ring 53, drive connecting assembly 6, first connecting gear shaft 61, support shaft platform 62, second connecting gear shaft 63, first-stage gear shaft 631, locking member 7, connecting ring 71, connecting arm 72, vertical arm 721, horizontal arm 7, limiting block 73, swing arm 8, abutment arm 81, locking arm 82. DETAILED DESCRIPTION

[0050] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific implementations disclosed below.

[0051] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0053] In related technology, some vehicle seats feature zero-gravity seating, wide-angle adjustment, and even full reclining. However, during wide-angle adjustment, the seatbelt retractors of existing zero-gravity seats are prone to locking, making it difficult to pull out or retract the webbing, impacting passenger comfort and safety.

[0054] In view of this, the present application provides a seat belt retractor, comprising a retractor body arranged on a car seat, a mechanical plate, a core shaft and a locking cover arranged on the retractor body, a ratchet assembly arranged on the inner side of the mechanical plate, a vehicle sensing assembly arranged in a vehicle sensing accommodating structure of the mechanical plate, and a counterweight and a swing arm connected to the vehicle sensing assembly, the seat belt retractor also includes: a limiting support structure, a convex gear plate, a drive connection assembly and a locking member; the limiting support structure is arranged on a first end face of the mechanical plate; the first end face of the mechanical plate is the end face of the mechanical plate facing the locking cover; the convex gear plate is slidably connected to the limiting support structure, and when rotated to a first position, presses the swing arm, so that the swing arm is separated from the ratchet assembly to be in an unlocked state; and releases the swing arm when rotated to a second position. The locking member is connected to the drive connecting assembly, and the locking end of the locking member is arranged relative to the convex gear of the vehicle sensing assembly, so that when the drive connecting assembly rotates in a first direction, the locking end of the locking member is driven to separate from the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in an unlocked state; when the drive connecting assembly rotates in a second direction, the locking end of the locking member is driven to contact the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in a locked state; and the webbing can be pulled out or rewound at the rotation angle of the car seat.

[0055] It can be understood that the seatbelt retractor provided by the present application rotates the convex gear plate to corresponding first and second positions, thereby causing the swing arm to disengage from the ratchet assembly to enter an unlocked state and engage with the ratchet assembly to enter a locked state. When the convex gear plate is rotated to the first position, it presses against the swing arm, disengaging the vehicle sensing ball of the vehicle sensing assembly. Even after the car seat back is folded down, the retractor can pull the webbing a certain distance before the vehicle sensing function activates, thereby satisfying the folding function without affecting the various functions of the retractor. Furthermore, when the drive connection assembly rotates in the first direction, the locking member drives the locking end of the locking member to disengage from the convex gear of the vehicle sensing assembly, thereby unlocking the vehicle sensing assembly. When the drive connection assembly rotates in the second direction, the locking end of the locking member drives the locking end of the locking member to engage with the convex gear of the vehicle sensing assembly, thereby locking the vehicle sensing assembly. This prevents locking during large-angle seat adjustment, allowing the webbing to be normally extended or retracted, thereby ensuring passenger safety.

[0056] Next, the seat belt retractor provided by the present application will be described in detail with reference to the accompanying drawings. Figure 1 This is a structural schematic diagram of a seat belt retractor provided in an embodiment of the present application. Figure 2 It is a structural schematic diagram of some components of the seat belt retractor provided in an embodiment of the present application. Figure 3 This is an exploded view of a seat belt retractor provided in an embodiment of the present application. Figure 4 It is a structural diagram of the vehicle sensing component provided in an embodiment of the present application.

[0057] Figure 5 It is a schematic structural diagram of the locking member provided in an embodiment of the present application. Figure 6 It is a schematic diagram of the locking state of the locking member and the convex gear provided in an embodiment of the present application. Figure 7 This is a schematic diagram of the unlocked state of the locking member and the convex gear provided in an embodiment of the present application. Figure 8 This is a schematic diagram of the state in which the convex gear plate provided in an embodiment of the present application abuts against the swing arm. Figure 9 It is a structural schematic diagram of the convex gear plate provided in an embodiment of the present application.

[0058] Figure 10 This is a structural diagram of the drive connection assembly and the locking member provided in an embodiment of the present application installed on a mechanical plate. Figure 11 It is a structural schematic diagram of the mechanical plate provided in an embodiment of the present application.

[0059] like Figures 1 to 11 As shown, the present application provides a seat belt retractor, which includes: a retractor body 1 provided on a car seat, a mechanical plate 2, and a locking cover 12 provided on the retractor body 1. The retractor body 1 includes a bracket assembly, a core shaft 11, a preload wheel, a torsion bar, a shaft head, a locking block assembly, and a ratchet assembly. The core shaft 11 is mounted on the bracket assembly, the preload wheel is connected to one end of the core shaft 11, the torsion bar is disposed inside the preload wheel, the shaft head is connected to the torsion bar, and the locking block assembly is connected to the shaft head. The mechanical plate 2 encapsulates the locking block assembly and the ratchet assembly on a first side of the mechanical plate 2 relative to the bracket assembly. The locking cover 12 encapsulates the mechanical plate 2 and is connected to the first side of the bracket assembly. The mechanical plate 2 also includes a vehicle sensor assembly 3 disposed within the vehicle sensor housing structure 21 and a counterweight 35 connected to the vehicle sensor assembly 3. The vehicle sensor assembly 3 includes a vehicle sensor mounting base 31, a vehicle sensor body 32, a vehicle sensor arm 33, a vehicle sensor ball, and a convex gear 34. The vehicle sensor mounting base 31 is mounted within the vehicle sensor housing structure 21, the vehicle sensor body 32 is mounted within the vehicle sensor mounting base 31, and the vehicle sensor ball is housed within the vehicle sensor body 32. The vehicle sensor ball drives the vehicle sensor arm 33. The convex gear 34 is connected to the vehicle sensor body 32 and rotates synchronously with the vehicle sensor body 32. The counterweight 35 is connected to the vehicle sensor body 32 so that the weight of the counterweight 35 drives the vehicle sensor mounting base 31 to rotate.

[0060] In this embodiment, the seat belt retractor further includes a limiting support structure 4, a convex gear plate 5, a drive connection assembly 6 and a locking member 7. The limiting support structure 4 is provided on the first end face of the mechanical plate 2, and the first end face of the mechanical plate 2 is the end face of the mechanical plate 2 facing the locking cover 12. The convex gear plate 5 is slidably connected to the limiting support structure 4, and when it is rotated to the first position, it presses against the swing arm 8, so that the swing arm 8 is separated from the ratchet assembly to be in an unlocked state. And when it is rotated to the second position, it releases the swing arm 8, so that the swing arm 8 contacts the ratchet assembly to be in a locked state. The drive connection assembly 6 is connected between the core shaft 11 and the convex gear plate 5, so that the convex gear plate 5 is driven by the core shaft 11 to rotate through the drive connection assembly 6. The connecting end of the locking member 7 is connected to the drive connection assembly 6. The locking end of the locking member 7 is disposed opposite the convex gear 34 of the vehicle sensing assembly 3. When the drive connection assembly 6 rotates in a first direction, the locking end of the locking member 7 is driven to separate from the convex gear 34 of the vehicle sensing assembly 3, thereby unlocking the vehicle sensing assembly 3. When the drive connection assembly 6 rotates in a second direction, the locking end of the locking member 7 is driven to contact the convex gear 34 of the vehicle sensing assembly 3, thereby locking the vehicle sensing assembly 3 and allowing the webbing to be pulled out or rewound at the rotation angle of the car seat.

[0061] The specific structure and connection relationship of each of the above components will be further described below.

[0062] Specifically, in this embodiment, the drive connection assembly 6 includes a first connecting gear shaft 61, a support shaft platform 62 and a second connecting gear shaft 63. Among them, the first connecting gear shaft 61 is connected to the connecting end of the core shaft 11 and is located on the first end face of the mechanical plate 2. In one example, the first connecting gear shaft 61 includes a first connecting hole, a connecting column, a gear shaft and a circumferential groove, the connecting column and the gear shaft are coaxially integrated, and the connecting column is located on the side close to the mechanical plate, and the circumferential groove is provided on the circumferential end face of the connecting column. The first connecting hole passes through the connecting column and the gear shaft. The connecting end of the core shaft 11 is connected to the first connecting hole to drive the first connecting gear shaft 61 to rotate synchronously. The support shaft platform 62 is provided on the first end face of the mechanical plate 2 and is located on the side of the center of the mechanical plate 2. The second connecting gear shaft 63 is movably mounted on the support shaft platform 62. The second connecting gear shaft 63 includes a second connecting hole and a first-stage gear shaft 631 and a second-stage gear shaft that are coaxially integrally formed. The second-stage gear shaft is located on the side close to the mechanical plate, and the second connecting hole passes through the first-stage gear shaft 631 and the second-stage gear shaft. The diameter of the first-stage gear shaft 631 is larger than the diameter of the second-stage gear shaft. The support column of the support shaft platform 62 is connected to the second connecting hole so that the second connecting gear shaft 63 can rotate around the support column of the support shaft platform 62 through the second connecting hole. The gear shafts of the first-stage gear shaft 631 and the first connecting gear shaft 61 are on the same radial plane, and the first-stage gear shaft 631 is meshed with the gear shaft of the first connecting gear shaft 61.

[0063] The connecting end of the locking member 7 is connected to the drive connection assembly 6. In this embodiment, the locking member 7 includes a locking steel wire rod, that is, the locking steel wire rod is composed of a locking steel wire rod. The locking steel wire rod includes an integrally formed ring-shaped connecting ring 71 and an L-shaped connecting arm 72. The ring-shaped connecting ring 71 is the connecting end of the locking member 7, and the L-shaped connecting arm 72 is the locking end of the locking member 7. The ring-shaped connecting ring 71 is fittedly connected to the first connecting gear shaft 61 so as to rotate synchronously with the first connecting gear shaft 61. Specifically, the ring shape of the ring-shaped connecting ring 71 is adapted to the circumferential groove on the first connecting gear shaft 61. The ring shape of the connecting ring 71 is adapted to the circumferential groove on the first connecting gear shaft 61, which means that the connecting ring 71 can be nested in the circumferential groove, so that the connecting ring 71 can rotate synchronously with the first connecting gear shaft 61 through the circumferential groove. In addition, the nesting arrangement of the connecting ring 71 and the circumferential groove is not fixed; rather, the connecting ring 71 and the circumferential groove can undergo relative movement when nested under the action of an external force. The L-shaped connecting arm 72 is arranged opposite the convex gear 34 and can contact or separate from the convex gear 34. Specifically, the L-shaped connecting arm 72 includes a vertical arm 721 and a horizontal arm 7. The vertical arm 721 is arranged along the line connecting the first connecting gear shaft 61 and the convex gear 34, and the horizontal arm 7 is perpendicular to the vertical arm 721. The horizontal arm 7 is arranged in a direction perpendicular to the rotation direction of the convex gear 34, so that the horizontal arm 7 can engage with the rack of the convex gear 34.

[0064] In this embodiment, in order to limit the swing position of the connecting arm 72, a limit stopper 73 is also included. The limit stopper 73 is provided on the mechanical plate 2 and is located on the line connecting the first connecting gear shaft 61 and the convex gear 34. Specifically, in one example, two limit stops 73 are provided, and the two limit stops 73 are distributed along the circumference of the mechanical plate 2, and the locking wire rod is limited in the limit gap between the two limit stops 73. Figure 10 、 Figure 11 In the figure, the limit stop 73 on the left is referred to as the first limit stop 73, and the limit stop 73 on the right is referred to as the second limit stop 73. The clearance between the first limit stop 73 and the second limit stop 73 represents the swing range of the connecting arm 72 of the locking wire rod. When the connecting assembly 6 is driven to rotate in the first direction and the connecting arm 72 of the locking wire rod swings to the first limit stop 73, the connecting arm 72 separates from the convex gear 34 of the vehicle sensing assembly 3. When the connecting assembly 6 is driven to rotate in the second direction and the connecting arm 72 of the locking wire rod swings to the second limit stop 73, the connecting arm 72 contacts the convex gear 34 of the vehicle sensing assembly 3.

[0065] It should be noted that when the driving connection component 6 drives the locking wire rod to rotate in the first direction or the second direction respectively, even if the locking wire rod is limited by the two limit blocks 73, the connecting end of the locking wire rod (connecting ring 71) and the circumferential groove can undergo relative movement under the driving force of the driving connection component 6 when they are nested.

[0066] In one scenario, the seatbelt retractor is mounted on the backrest of a car seat. When the car seat backrest is adjusted, the drive connection assembly 6 drives the locking member 7 to separate from the convex gear 34, thereby disengaging from the convex gear 34. When the seatbelt retractor swings with the backrest, the vehicle sensor assembly 3 rotates under the action of the counterweight, allowing the webbing to be pulled out and rewound normally without becoming locked or tightened midway. When the car seat backrest stops adjusting, the locking member 7 contacts the convex gear 34 to lock with the convex gear 34, thereby securing the vehicle sensor assembly 3. At this time, the webbing can still be pulled out and rewound normally for a distance. At the same time, under the inertial force of the vehicle sensor ball, the vehicle sensor assembly 3 can drive the vehicle sensor arm 33 to lock with the ratchet assembly, thereby meeting the locking performance requirements.

[0067] The limiting support structure 4 is provided on the first end face of the mechanical plate 2, and the first end face of the mechanical plate 2 is the end face of the mechanical plate 2 facing the locking cover 12. Specifically, in the present embodiment, the limiting support structure 4 includes: a support limiting ring 41 and a limiting body 42. Among them, the support limiting ring 41 is provided on the first end face of the mechanical plate 2 around the center of the mechanical plate 2. The support limiting ring 41 is circular. The limiting body 42 is provided on the first end face of the mechanical plate 2 and is located on the outside of the support limiting ring 41. In one example, a portion of the limiting body 42 is provided in an arc shape. The convex gear plate 5 is slidably connected to the support limiting ring 41 and is confined between the support limiting ring 41 and the limiting body 42.

[0068] In this embodiment, the position-limiting support structure 4 further includes an anti-interference protrusion 43, which is provided on the first end face of the mechanical plate 2, and the protrusion height of the anti-interference protrusion 43 is higher than the protrusion height of the support limit ring 41, the position-limiting body 42, and the drive connection assembly 6 provided on the first end face of the mechanical plate 2. The anti-interference protrusion 43 is used to prevent the locking cover 12 from pressing down and interfering with the drive connection assembly 6, the convex gear plate 5, and the locking member 7. In one example, the anti-interference protrusion 43 includes an irregular arc-shaped body, a recessed portion, and a raised portion 431 that are integrally formed, wherein the irregular arc-shaped body is provided between the first connecting gear shaft 61 and the support shaft platform 62, the recessed portion is located in the middle of the irregular arc-shaped body, and the first-stage gear shaft 631 can cover the recessed portion. The raised portion 431 is located at the end positions of both ends of the irregular arc body, and the raised portion 431 has a raised height higher than the raised height of the support limit ring 41, the limit body 42 and the drive connection assembly 6 provided on the first end surface of the mechanical plate 2.

[0069] In this embodiment, the position-limiting support structure 4 further includes a foot-picking structure 44, of which at least two are provided, and at least two foot-picking structures 44 are spaced apart and arranged on the support limit ring 41. The foot-picking structure 44 is pressed against the convex gear plate 5 to prevent loosening and limit the position, while also reducing vibration and abnormal noise.

[0070] The convex gear plate 5 is slidably connected to the limiting support structure 4. Specifically, in this embodiment, the convex gear plate 5 includes a ring-shaped body 51, a connecting groove, a limiting protrusion 52, and a gear ring 53. The connecting groove is provided on the side of the first end face of the ring-shaped body 51 facing the mechanical plate 2, and the connecting groove is slidably connected to the support limiting ring 41. The limiting protrusion 52 is provided on the outer peripheral side of the ring-shaped body 51, and the limiting protrusion 52 is provided on the outer peripheral side of the ring-shaped body 51 in the radial direction of the ring-shaped body 51. When the limiting protrusion 52 rotates to the first position with the ring-shaped body 51, the swing arm 8 is pressed, so that the swing arm 8 is separated from the ratchet assembly to be in an unlocked state. And when the limiting protrusion 52 rotates to the second position with the ring-shaped body 51, the swing arm 8 is released, so that the swing arm 8 contacts the ratchet assembly to be in a locked state. The gear ring 53 is provided on the inner circumference of the ring-shaped main body 51 , and the rack of the gear ring 53 is meshed and connected with the second-stage gear shaft of the second connecting gear shaft 63 .

[0071] The swing arm 8 is movably mounted on the mechanical plate 2, adjacent to the vehicle sensor housing structure 21. It is driven by the vehicle sensor arm 33 of the vehicle sensor assembly 3 to rotate. The swing arm 8 includes an abutment arm 81 and a locking arm 82. These abutment arm 81 and locking arm 82 are each positioned toward the convex gear plate 5. The abutment arm 81 abuts against the stop protrusion 52, while the locking arm 82 abuts against the wheel assembly. When the webbing is not restraining a person, the webbing does not drive the core shaft 11 to rotate. The stop protrusion 52 contacts the abutment arm 81 of the swing arm 8, inhibiting the swing arm 8 from swinging. Simultaneously, the counterweight 35 rotates the vehicle sensor assembly 3 through its own gravity, ensuring that the vehicle sensor ball of the vehicle sensor assembly 3 remains horizontal when the retractor body 1 rotates with the car seat. This allows the webbing to be pulled out or rewound according to the rotation angle of the car seat. When the webbing is restraining a person, the webbing drives the core shaft 11 to rotate, which in turn drives the stop protrusion 52 to create a swingable space relative to the swing arm 8. At the same time, the vehicle sensing ball has an inertial force when the vehicle sensing assembly 3 is locked and swings through the inertial force to drive the swing arm 8 to swing in the swing space to contact the ratchet assembly to be in a locked state.

[0072] The present application provides a seat belt retractor, comprising a retractor body 1 arranged on a car seat, a mechanical plate 2, a core shaft 11 and a locking cover 12 arranged on the retractor body 1, a ratchet assembly arranged on the inner side of the mechanical plate 2, a vehicle sensing assembly 3 arranged in a vehicle sensing accommodating structure 21 of the mechanical plate 2, and a counterweight 35 and a swing arm 8 connected to the vehicle sensing assembly 3. The seat belt retractor also includes: a limiting support structure 4, a convex gear plate 5, a drive connection assembly 6 and a locking member 7; the limiting support structure 4 is arranged on the first end face of the mechanical plate 2; the first end face of the mechanical plate 2 is the end face of the mechanical plate 2 facing the locking cover 12; the convex gear plate 5 is slidably connected to the limiting support structure 4, and when rotated to the first position, presses the swing arm 8, so that the swing arm 8 is separated from the ratchet assembly to be in an unlocked state; and releases the swing arm when rotated to the second position. 8, so that the swing arm 8 contacts the ratchet assembly to be in a locked state; the drive connection assembly 6 is connected between the core shaft 11 and the convex gear plate 5, so that the convex gear plate 5 is driven to rotate through the drive connection assembly 6 under the drive of the core shaft 11; the connecting end of the locking member 7 is connected to the drive connection assembly 6, and the locking end of the locking member 7 is arranged opposite to the convex gear 34 of the vehicle sensing assembly 3, so that when the drive connection assembly 6 rotates in a first direction, the locking end of the locking member 7 is driven to separate from the convex gear 34 of the vehicle sensing assembly 3, so that the vehicle sensing assembly 3 is in an unlocked state; when the drive connection assembly 6 rotates in a second direction, the locking end of the locking member 7 is driven to contact the convex gear 34 of the vehicle sensing assembly 3, so that the vehicle sensing assembly 3 is in a locked state; and the webbing can be pulled out or reeled under the rotation angle of the car seat.

[0073] The seatbelt retractor provided herein rotates the convex gear plate 5 between corresponding first and second positions, causing the swing arm 8 to disengage from the ratchet assembly for an unlocked state and engage with the ratchet assembly for a locked state. When the convex gear plate 5 is rotated to the first position, it presses against the swing arm 8, disengaging the vehicle sensing ball of the vehicle sensing assembly 3. Even after the car seat back is folded down, the retractor can pull the webbing a certain distance before the vehicle sensing function is activated, thereby fulfilling the folding function without affecting the retractor's other functions. Furthermore, when the drive connection assembly 6 rotates in the first direction, the locking end of the locking member 7 disengages from the convex gear 34 of the vehicle sensing assembly 3, placing the vehicle sensing assembly 3 in the unlocked state. When the drive connection assembly 6 rotates in the second direction, the locking end of the locking member 7 engages with the convex gear 34 of the vehicle sensing assembly 3, placing the vehicle sensing assembly 3 in the locked state. This prevents locking during wide-angle seat adjustment, allowing the webbing to be properly extended or retracted, thereby ensuring passenger safety.

[0074] The present application also provides a car seat, which includes the above-mentioned seat belt retractor. The specific description of the seat belt retractor can be found in the description of the above-mentioned embodiment, and will not be repeated here.

[0075] It should be noted that although several structures, components, or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, depending on the specific implementation of the application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided into multiple components, structures, or units for embodiment.

[0076] Furthermore, although the components of the assembly or device of the present application and the arrangement of the components are depicted in a particular order in the drawings, this does not require or imply that the assembly or device must be designed in accordance with the particular components or arrangement of the components, or that all of the components shown must be included to achieve the desired results. Additionally or alternatively, certain components may be omitted, multiple components may be combined into one component to achieve corresponding functions, and / or one component may be decomposed into multiple components to achieve corresponding functions, etc.

[0077] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A seat belt retractor, comprising a retractor body mounted on a car seat, a mechanical plate, a spindle, and a locking cover mounted on the retractor body, a ratchet assembly mounted on the inner side of the mechanical plate, a vehicle sensing assembly mounted in a vehicle sensing housing structure of the mechanical plate, and a counterweight and a swing arm connected to the vehicle sensing assembly, characterized in that: include: A limiting support structure, a convex gear plate, a drive connection assembly and a locking member; The position-limiting support structure is provided on the first end surface of the mechanical plate; the first end surface of the mechanical plate is the end surface of the mechanical plate facing the locking cover; The convex gear plate is slidably connected to the position-limiting support structure, and when rotated to a first position, presses against the swing arm, so that the swing arm is separated from the ratchet assembly to be in an unlocked state; and when rotated to a second position, releases the swing arm, so that the swing arm contacts the ratchet assembly to be in a locked state; The drive connection assembly is connected between the core shaft and the convex gear plate, so as to drive the convex gear plate to rotate through the drive connection assembly under the drive of the core shaft; The connecting end of the locking member is connected to the drive connection assembly, and the locking end of the locking member is arranged opposite to the convex gear of the vehicle sensing assembly, so that when the drive connection assembly rotates in a first direction, the locking end of the locking member is driven to separate from the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in an unlocked state; and when the drive connection assembly rotates in a second direction, the locking end of the locking member is driven to contact the convex gear of the vehicle sensing assembly, so that the vehicle sensing assembly is in a locked state, and the webbing can be pulled out or reeled under the rotation angle of the car seat.

2. The seat belt retractor according to claim 1, characterized in that: The drive connection assembly includes a first connecting gear shaft, a support pillow block, and a second connecting gear shaft; The first connecting gear shaft is connected to the connecting end of the core shaft and is located on the first end surface of the mechanical plate; The support pillow is arranged on the first end surface of the mechanical plate and is located on the side of the center of the mechanical plate; The second connecting gear shaft is movably arranged on the support shaft platform, and the second connecting gear shaft includes a first-stage gear shaft, and the first-stage gear shaft is meshedly connected with the gear shaft of the first connecting gear shaft.

3. The seat belt retractor according to claim 2, characterized in that: The locking member includes a locking steel wire rod, and the locking steel wire rod includes an integrally formed ring-shaped connecting ring and an L-shaped connecting arm; The ring-shaped connecting ring is sleeve-connected to the first connecting gear shaft to rotate synchronously with the first connecting gear shaft; the connecting ring is the connecting end of the locking member; The L-shaped connecting arm is arranged opposite to the convex gear and can be in contact with or separated from the convex gear. The connecting arm is the locking end of the locking member.

4. The seat belt retractor according to claim 3, characterized in that: It also includes a limit stopper, which is arranged on the mechanical plate and located on the line connecting the first connecting gear shaft and the convex gear; The number of the limit blocks is two, and the two limit blocks are distributed along the circumference of the mechanical plate, and the locking steel wire rod is limited in the limit gap between the two limit blocks.

5. The seat belt retractor according to claim 2, characterized in that: The limiting support structure includes: a supporting limiting ring and a limiting body; The support limiting ring surrounds the center of the mechanical plate and is arranged on the first end surface of the mechanical plate; The limiting body is arranged on the first end surface of the mechanical plate and is located outside the supporting limiting ring; The convex gear plate is slidably connected to the support limiting ring and is confined between the support limiting ring and the limiting body.

6. The seat belt retractor according to claim 5, characterized in that: The limiting support structure also includes: an anti-interference protrusion, which is arranged on the first end surface of the mechanical plate, and the protrusion height of the anti-interference protrusion is higher than the protrusion height of the support limiting ring, the limiting body and the drive connection assembly arranged on the first end surface of the mechanical plate; the anti-interference protrusion is used to prevent the locking cover from pressing down to interfere with the drive connection assembly, the convex gear plate and the locking member.

7. The seat belt retractor according to claim 5, characterized in that: The position-limiting support structure further includes a foot-picking structure, and at least two of the foot-picking structures are provided, and at least two of the foot-picking structures are spaced apart and arranged on the support position-limiting ring.

8. The seat belt retractor according to claim 5, characterized in that: The convex gear plate includes a ring-shaped main body, a connecting groove, a limiting protrusion and a gear ring; The connecting slide groove is provided on one side of the ring-shaped body facing the first end surface of the mechanical plate, and the connecting slide groove is in sliding connection with the support limiting ring; The limiting protrusion is provided on the outer peripheral side of the ring-shaped body, and the limiting protrusion is provided on the outer peripheral side of the ring-shaped body in the radial direction of the ring-shaped body; when the ring-shaped body rotates to the first position, the limiting protrusion presses the swing arm, so that the swing arm is separated from the ratchet assembly to be in an unlocked state; and when the ring-shaped body rotates to the second position, the swing arm is released, so that the swing arm contacts the ratchet assembly to be in a locked state; The gear ring is arranged on the inner circumference side of the ring-shaped main body, and the rack of the gear ring is meshed and connected with the second-stage gear shaft of the second connecting gear shaft.

9. The seat belt retractor according to claim 8, characterized in that: The swing arm is movably arranged on the mechanical plate and is located on the side of the vehicle sensing accommodating structure, and can be rotated under the driving of the vehicle sensing arm of the vehicle sensing assembly; The swing arm includes an abutting arm and a locking arm, the abutting arm and the locking arm are respectively arranged toward the convex gear plate, the abutting arm can abut against the limiting protrusion, and the locking arm abuts against the ratchet assembly; When the webbing is not restraining the human body, the webbing does not drive the core shaft to rotate, and the limiting protrusion contacts the abutting arm of the swing arm to inhibit the swing arm from swinging; at the same time, the counterweight drives the vehicle sensing component to rotate by its own gravity, so that the vehicle sensing ball of the vehicle sensing component is always in a horizontal position when the retractor body rotates with the car seat, and the webbing can be pulled out or rewound at the rotation angle of the car seat; When the webbing restrains the human body, the webbing drives the core shaft to rotate, and drives the limiting protrusion to rotate to form a swingable space relative to the swing arm; at the same time, the vehicle sensing ball has an inertial force when the vehicle sensing component is locked and swings through the inertial force, so as to drive the swing arm to swing in the swing space to contact the ratchet assembly to be in a locked state.

10. A car seat, characterized in that: The invention comprises a seat belt retractor according to any one of claims 1 to 9.

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