A short-distance unlocking retractor assembly

Abstract

The utility model relates to a short-distance unlocking reel assembly. The technical problem to be solved by the utility model is to provide a short-distance unlocking reel assembly. The technical solution adopted by the utility model includes a frame, a reel, a spring assembly, a belt-sensing locking device, a vehicle-sensing locking device, a reel end cover, and a stop block assembly. The stop block assembly includes a stop block, a reset tension spring, and a stop block limiting column. The stop block includes a stop block locking portion and a stop block swinging portion. The stop block locking portion is provided with a stop tooth and a stop block docking hole. The end of the stop block swinging portion is provided with a semi-circular arc reinforcement portion. The frame is provided with a reel insertion hole, and the reel insertion hole is provided with a frame locking tooth around the arc interval. The advantage of the utility model is that the rewinding can make the reset tension spring directly drive the stop block to unlock, so that the unlocking rewinding distance is shortened, the unlocking is easier, and the speed is faster, so that the passenger experience and comfort are higher in complex road conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile retractor assemblies, in particular to a short-distance unlocking retractor assembly. Background Art

[0002] As a basic or standard configuration of car seat belts, emergency locking car seat belts are widely used in the market. The retractor of this type of seat belt is equipped with a vehicle-sensing locking device. When the vehicle encounters an emergency, such as tilt or a sharp change in acceleration, the vehicle-sensing locking device senses it and locks the retractor, and the webbing cannot be pulled out, thereby limiting the movement of passengers, ensuring the safety of passengers, and reducing the degree of injury to passengers. Generally, when the seat belt is locked, we need to pull the belt back a certain distance (about 11mm) to unlock the seat belt. This causes the car to be particularly prone to false triggering of the seat belt lock in some specific scenarios, such as on some bumpy mountain roads, undulating roads, or when adjusting the height. The seat belt retraction unlocking distance is long, unlocking is inconvenient, and the overall comfort of the user is poor. To address this problem, the existing products need to be further improved. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a short-distance unlocking retractor assembly.

[0004] The technical solution adopted by the utility model short-distance unlocking retractor assembly: including a frame, a reel rotatably installed in the frame, a spring assembly, a belt-sensing locking device, a vehicle-sensing locking device installed on the frame, a retractor end cover, and a stop block assembly arranged at the end of the reel, characterized in that the stop block assembly includes a stop block, a reset tension spring and a stop block limiting column, the stop block includes a stop block locking part and a stop block swinging part, the stop block locking part is provided with a stop tooth and a stop block docking hole for positioning the stop block limiting column, the end of the stop block swinging part is provided with a semicircular arc reinforcement part, the frame is provided with a reel insertion hole, and the reel insertion hole is provided with frame locking teeth for locking the stop tooth at intervals around the arc;

[0005] One end of the reset tension spring is connected to the stop block limiting column and the other end thereof is fixed to the reel, the end of the reel is provided with a stop block action opening and a reel docking column for installing the stop block, the stop block action opening is provided with an arc positioning groove corresponding to the semi-circular arc reinforcement portion, the belt-sensing locking device comprises an inertia wheel sleeved on the reel docking column, the inertia wheel is provided with a limiting column limiting opening for the stop block limiting column to pass through, and the inertia wheel is provided with a circle of inertia wheel locking teeth outside for locking the vehicle-sensing locking device.

[0006] The reset tension spring includes a tension spring arc portion, one end of the tension spring arc portion is provided with a tension spring sleeve end for sleeved on the stop block limiting column, the other end of the tension spring arc portion is bent to form a tension spring clamping end, and the end of the reel is provided with a reel clamping groove for limiting the tension spring clamping end.

[0007] The arc angle of the arc portion of the tension spring is 180°.

[0008] The height of the stop block swinging portion is smaller than the height of the stop block locking portion.

[0009] A swinging gap is formed between the semicircular arc reinforcement portion and the stop block swinging portion.

[0010] The stop teeth are arranged at intervals on the locking portion of the stop block, and the number of the stop teeth is 3.

[0011] The end of the reel is provided with a reel inclined guide surface at the reel clamping groove to facilitate the leading out of the arc portion of the tension spring.

[0012] The advantage of the short-distance unlocking retractor assembly of the utility model is that after the seat belt is locked (i.e. the reel is locked), the stop block component structure can rewind so that the reset spring can directly drive the stop block to unlock, so that the unlocking rewind distance is shortened, the unlocking is easier and faster, and the passenger experience and comfort are higher in complex road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is an exploded view of the short-distance unlocking retractor assembly of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the stop block assembly of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the stop block of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the reel of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the belt-sensing locking device of the utility model;

[0019] Figure 6 It is a structural schematic diagram of the frame of the utility model;

[0020] Figure 7 It is a structural schematic diagram of the reset tension spring of the utility model;

[0021] Figure 8It is another structural schematic diagram of the reel of the utility model. DETAILED DESCRIPTION

[0022] like Figure 1-8 As shown, the short-distance unlocking retractor assembly involved in the utility model includes a frame 1, a reel 2 rotatably installed in the frame 1, a spring assembly 3, a belt-sensing locking device 4, a vehicle-sensing locking device 5 installed on the frame 1, a retractor end cover 6, and a stop block assembly 7 arranged at the end of the reel 2, the stop block assembly 7 includes a stop block 10, a reset tension spring 11 and a stop block limiting column 12, the stop block 10 includes a stop block locking portion 14 and a stop block swinging portion 15, the stop block locking portion 14 is provided with a stop tooth 16 and a stop block docking hole 18 for positioning the stop block limiting column 12, the end of the stop block swinging portion 15 is provided with a semicircular arc reinforcement portion 17, the frame 1 is provided with a reel insertion hole 29, the The reel insertion hole 29 is provided with frame locking teeth 30 for locking the stop tooth 16 at intervals around the arc; one end of the reset tension spring 11 is connected to the stop block limiting column 12 and the other end is fixed on the reel 2, and the end of the reel 2 is provided with a stop block action port 21 and a reel docking column 23 for installing the stop block 10, and the stop block action port 21 is provided with an arc positioning groove 22 corresponding to the semi-circular arc reinforcement portion 17, and the belt-sensing locking device 4 includes an inertia wheel 25 sleeved on the reel docking column 23, and the inertia wheel 25 is provided with a limiting column limiting port 26 for the stop block limiting column 12 to pass through, and the inertia wheel 25 is provided with a circle of inertia wheel locking teeth 27 for locking the vehicle-sensing locking device 5.

[0023] Unlocking process: For a traditional retractor, after the reel is locked, when the rewind reaches a certain distance (about 11 mm), the vehicle-sensing locking device 5 and the inertia wheel 25 and the inertia wheel locking tooth 27 are unlocked, and the reset spring on the inertia wheel 25 pushes the stop block limit column 12 to move in the stop block action port 21, and the stop block limit column 12 drives the stop block 10 to return, so that the stop block 10 and the frame locking tooth 30 of the frame 1 are unlocked, thereby realizing the final unlocking of the seat belt. The traditional structure has a long rewind unlocking distance because the inertia wheel 25 is unlocked first and then drives the stop block 10 to unlock, and there is a conduction time difference;

[0024] After the reel is locked, this retractor rewinds a certain distance (about 4mm). At this time, the reset spring 11 is acted upon by the rewinding action, directly driving the stop block limiting column 12 to move in the stop block action port 21. Since the reset spring 11 is installed on the reel 2, the stop block limiting column 12 drives the stop block 10 to return, so that the action of unlocking the stop block 10 and the frame locking tooth 30 of the frame 1 and the action of the stop block limiting column 12 driving the vehicle sense locking device 5 and the inertia wheel 25 inertia wheel locking tooth 27 to unlock in reverse occur simultaneously without a time difference in conduction. Therefore, the distance of the rewinding unlocking is short, so the unlocking is easier and faster, which makes the passengers' experience and comfort higher in complex road conditions.

[0025] The reset tension spring 11 includes a tension spring arc portion 31, one end of the tension spring arc portion 31 is provided with a tension spring sleeve end 32 for sleeved on the stop block limiting column 12, the other end of the tension spring arc portion 31 is bent to form a tension spring clamping end 33, and the end of the reel 2 is provided with a reel clamping groove 35 for limiting the tension spring clamping end 33.

[0026] The arc angle of the tension spring arc portion 31 is 180°, so the restoring force of the reset tension spring is guaranteed.

[0027] The height of the stop block swinging portion 15 is smaller than the height of the stop block locking portion 14 , so that the stop block can be installed and positioned more accurately and its action can be more reliable.

[0028] A swinging gap 19 is formed between the semicircular arc reinforcement portion 17 and the stop block swinging portion 15, so that the action transition is smoother and there will be no jamming.

[0029] The stop block locking portion 14 is provided with the stop teeth 16 at intervals. The number of the stop teeth 16 is three, which makes the locking tighter and more reliable.

[0030] The end of the reel 2 is provided with a reel inclined guide surface 36 at the reel slot 35 for facilitating the leading out of the tension spring arc portion 31 , so that the transition is smooth, the damage to the reset tension spring is small, and the service life of the reset tension spring is increased.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A short-distance unlocking retractor assembly, comprising a frame (1), a reel (2) rotatably mounted in the frame (1), a spring assembly (3), a belt-sensing locking device (4), a vehicle-sensing locking device (5) mounted on the frame (1), a retractor end cover (6), and a stop block assembly (7) provided at the end of the reel (2), characterized in that: The stop block assembly (7) comprises a stop block (10), a reset tension spring (11) and a stop block limiting column (12); the stop block (10) comprises a stop block locking portion (14) and a stop block swinging portion (15); the stop block locking portion (14) is provided with a stop tooth (16) and a stop block docking hole (18) for positioning the stop block limiting column (12); the end of the stop block swinging portion (15) is provided with a semicircular arc reinforcement portion (17); the frame (1) is provided with a reel insertion hole (29); the reel insertion hole (29) is provided with frame locking teeth (30) for locking the stop tooth (16) at intervals around the arc; One end of the return tension spring (11) is connected to the stop block limiting column (12) and the other end is fixed to the reel (2). The end of the reel (2) is provided with a stop block action opening (21) and a reel docking column (23) for installing the stop block (10). The stop block action opening (21) is provided with a circular arc positioning groove (22) corresponding to the semi-circular arc reinforcement portion (17). The belt-sensing locking device (4) comprises an inertia wheel (25) sleeved on the reel docking column (23). The inertia wheel (25) is provided with a limiting column limiting opening (26) for the stop block limiting column (12) to pass through. The inertia wheel (25) is provided with a circle of inertia wheel locking teeth (27) for locking the vehicle-sensing locking device (5).

2. The short-distance unlocking retractor assembly according to claim 1, characterized in that: The reset tension spring (11) comprises a tension spring circular arc portion (31), one end of the tension spring circular arc portion (31) is provided with a tension spring sleeve end (32) for sleeved on the stop block limiting column (12), the other end of the tension spring circular arc portion (31) is bent to form a tension spring clamping end (33), and the end of the reel (2) is provided with a reel clamping groove (35) for limiting the tension spring clamping end (33).

3. The short-distance unlocking retractor assembly according to claim 2, characterized in that: The arc angle of the tension spring arc portion (31) is 180°.

4. The short-distance unlocking retractor assembly according to claim 1, characterized in that: The height of the stop block swinging portion (15) is smaller than the height of the stop block locking portion (14).

5. The short-distance unlocking retractor assembly according to claim 1, characterized in that: A swing-off gap (19) is formed between the semicircular arc reinforcement portion (17) and the stop block swing portion (15).

6. The short-distance unlocking retractor assembly according to claim 1, characterized in that: The stop block locking portion (14) is provided with the stop teeth (16) at intervals, and the number of the stop teeth (16) is three.

7. The short-distance unlocking retractor assembly according to claim 2, characterized in that: The end of the reel (2) is provided at the reel clamping groove (35) with a reel inclined guide surface (36) for facilitating the leading out of the tension spring arc portion (31).

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