RU24346U1 - SECURITY BELT LOCK - Google Patents

Description

SECURITY BELT LOCK

This utility model relates to vehicle safety systems, namely to passive safety devices, and is a seat belt lock designed to protect the driver and passengers in extreme situations.

Known analogues of this utility model include seat belt buckles according to the patent of the Russian Federation No. 2101202, class. А44В 11/00, B60R 22/30 and RF patent No. 2125396, class. A44B 11/00. For the prototype of a utility model, a seat belt lock is selected, described in the certificate for a utility model of the Russian Federation No. 15841, class. А44В 11/00, B60R 22/30, (publication of November 20, 2000 in bulletin No. 32), which consists of interconnected detachable and receiving parts. The detachable part contains a tongue with a hole at the insertion end, and the receiving part, housed in a protective housing, contains a U-shaped clip. In the front part of the cage two symmetrically bent and facing each other sections of the side walls of the cage are made. A latch is mounted in the clip, on the front of which there is a tooth for interacting with the tongue hole and the hole made in the base of the clip. At the rear of the latch there are lateral protrusions freely mounted in slots located in the side walls of the cage. To lock the latch there is a latch located with the ability to move in the elongated

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the openings of the side walls of the cage parallel to itself and the base of the cage under the action of the opening button and equipped with a spring that exerts pressure on the lock and made in the form of a symmetrically curved plate placed by inflection zones in the lower bases of the oblong openings of the side walls of the cage and containing a central part with a protruding flange in contact with side walls of the cage, and side parts, the end zones of which are in contact with the latch. To push the tongue out of the lock, an ejector with an ejection spring is provided in the design. The lower bases of the oblong holes of the side walls of the cage are made rectangular. The protruding flange of the central part of the spring is directed to the protective housing of the receiving part of the lock. The central part of the spring and its protruding flange are located in the same plane.

A disadvantage of the known design is that in practice there are problems of combining the tooth with the holes of the tongue and the base of the clip, in particular, when debris enters the lock mechanism (which is common in vehicles) or into these holes, which partially or completely prevents free entry tooth into the holes. The movement of the tooth towards the holes largely depends on the position of the lock, for example, with the vertical position of the latch of the lock uninterrupted locking of the lock is not guaranteed, because dead weight of the latch may prevent the lock from closing and thus

the use of such a lock does not ensure the reliability of the circuit in practice, which is required in vehicle safety devices. Each interruption in the operation of the latch (for example, when the latch itself locks or the latch spring during contamination) also leads to an undefined behavior of the latch when the tongue is inserted into the lock, in which the position of the latch depends on the action of gravity and accidental side effects (vibration, shock). These circumstances do not allow the use of the castle in critical moments, thereby limiting its use.

The technical result of this utility model is to increase the reliability of the seat belt lock by applying a forced closure.

This technical result is achieved in that the lock for the vehicle seat belt contains interlocking detachable and receiving parts, while the detachable part has a tongue with a hole at the plug-in end, the receiving part is housed in a protective housing and contains a U-shaped clip in front of which two symmetrically bent and facing each other sections of the side walls of the cage. A curved L-shaped latch in the form of a plate is mounted in the clip, on the front side of which there is a tooth for interacting with the tongue hole and the hole made at the base of the clip, the upper part of the latch is equipped with notch-catching catching side walls, and the side latches are made in the back of the latch protrusions

freely mounted in slots located in the side walls of the cage, a latch lock block that can move parallel to itself and the base of the cage, freely moving in the oblong holes of the side walls of the cage under the action of the opening button, the ejector equipped with a spring and interacting with the lock language, and the spring retainer to apply pressure to the retainer. According to the invention, the latch is additionally equipped with two supporting protrusions symmetrically located on its sides from the tooth latch side, the height of which is equal to or greater than the thickness of the latch and which are located between the center of gravity of the latch and the side protrusions in such a way that they interact with the tongue ejector at a point located eccentrically with respect to the center of gravity of the longitudinal axis of the latch.

Next, the utility model is described in more detail with reference to the drawings, which depict the following:

FIG. 1 depicts a general view of the proposed castle in disassembled condition;

FIG. 2 is a sectional side view of the proposed lock in the open position;

fig.Z is a sectional side view of the proposed castle in the closed position;

4 is a latch with curved support projections;

5 is a side view of the latch;

consists of interlocking detachable and receiving parts. The detachable part comprises a tongue 1 with a hole 2 at the insertion end. The receiving part consists of a U-shaped clip 3, in which there is a latch 4. A latch 4 is acted upon by a latch spring 5 by means of a latch 6, To push the tongue 1 out of the lock, the ejector 8 is provided in the construction with an eject spring 7, which is controlled by the open button 9. In the front part of the cage 3, bent elements 10 and 11 are symmetrical to the side walls 12, 13. The bent elements 10 and 11 are facing each other so that a gap remains between them. In the side walls 12, 13 of the cage 3, oblong holes 14 are made for gripping the end of the retainer b and slots 15 for gripping the protrusions 16 of the latch 4. At the base 17 of the cage 3 there is a hole 18. The latch 4 is made of sheet material so that on its front side 19 there is a tooth 20, which enters the hole 2 of the tongue 1 and the hole 18 of the base 17 of the holder 3. The front side 19 of the latch has a L-shaped profile. On the upper part of the latch 4 there are two walls 21 symmetrically bent upwards, which, in turn, are made with a stepped notch 22, which has a side face 23 for accepting the increasing force of the retainer spring 5. The wall 21 is provided with an end face 24. The latch 4 is additionally equipped with two support protrusions 26 symmetrically located on its sides, the height of which is equal to or greater than the thickness of the latch 4. The support protrusions 26 can be formed from the side

parts of the latch by bending them or by fixing protruding elements on the bottom of the latch (for example, by welding). The supporting elements 26 protrude from the tooth 20 and are located between the center of gravity M of the latch 4 and the side protrusion 16. The supporting elements 26 are eccentrically placed with respect to the longitudinal axis C passing through the center of gravity of the latch. At the base 17 of the cage 3, the ejector 8 and the ejector spring 7 are mounted so that they can move along the axis of the casing 3. The ejector spring 7 is located in the hole 17 of the base 16 of the cage 3 so that its one end rests on the finger 27 of the ejector 8 and the other the end rests on the spring support 28. The latch 6 is designed to lock the latch 4 in the closed position. To perform this function, the spring-loaded lock 5 during longitudinal movement is supported by oblong holes 14 of the side walls 12, 13 of the sleeve 3, and its movement parallel to the base 17 of the sleeve 3 is carried out using the button 9. The spring 5 of the lock is made in the form of a coil spring and its one end leans on the centering element 29 of the retainer 6, which prevents the spring 5 from being accidentally displaced towards the walls 12, 13 of the holder 3. The second end of the spring 5 is supported by the support 30 of the retainer spring on the holder 3 and the lock rod 31. The spring support 30 is fixed in the lock in such a way that its ends are not displaced towards the side of the cage during spring deformation during operation of the lock, and the centering element 29 and the guide element

32 retainer springs 5 are arranged so that they prevent the coil spring from shifting toward the sides of the cage during spring deformation during operation of the lock. Such strong spring fixation is of particular importance in the operation of vehicles, since the vibration of the vehicle, the spring can be displaced from its place. To accommodate the support element 30 of the spring and its guide element 32 at the rear end of the latch 4, a groove 33 is made (Fig. B). The spring support element 30 can be made in the form of a curved beam 34, which rests on the oval openings of the side walls 12, 13 of the cage 3. The entire receiving part of the lock is located in the protective housing 35, and the lock is attached to the seat or body of the vehicle using the link 31.

The described castle operates as follows.

When closing the lock, the ejector 8 moves back under the influence of the tongue 1 inserted into the lock until it contacts the support protrusions 26. Due to the eccentricity of the support protrusions, the latch 4 rotates due to the force from the ejector side, and the tooth 20 moves into the holes 2 and 18, thereby closing the lock.

In closed form, the tooth 20 of the latch 4 is simultaneously in the hole 2 of the tongue 1 and the hole 18 of the base 17, and the latch b is pressed by the spring 5 against the elongated holes 14 of the walls 12, 13 towards the tongue 1 so that the latch b abuts against the end face 24 in the wall of the upwardly bent wall 21 of the latch 4. Consequently, the tooth 20 of the latch 4

prevents the tongue from escaping from the lock, and at the same time, the constant pressure of the spring 5 on the latch 4 by means of the side walls 12, 13 ensures reliable placement of the tooth 20 in the hole 2 of the tongue 1 and the hole 18 of the base 17. To open the lock, press the opening button 9, which in contact with the latch 6, moves it in the oblong holes 14 in the direction of the thrust 31 and moves the latch 6 from the stepped notches 22, overcoming the pressure of the spring 5, which, in turn, allows the latch 4 to rise. The ejector 8, using its spring 7, disengages the tooth 20 of the latch 4, ejecting the tongue from the receiving part of the lock.

In the open position, the tooth 20 of the latch 4 rests on the ejector 8 and the base 17 and the latch b is pressed in the oblong holes 14 of the side walls 12, 13 towards the thrust 30. The latch 6, due to the deformation of the spring 5, exerts pressure on the side face 23 of the stepped incisions 22 of the latch wall 21 4.

The described design allows you to ensure that the tooth enters the hole in the lock, even with a significant decrease in the force of the spring of the retainer due to contamination of the lock.

Claims (1)

A lock for a vehicle seat belt containing interlocking detachable and receiving parts, the detachable part having a tongue with a hole at the plug-in end, the receiving part of the lock placed in a protective housing and containing a U-shaped clip, in the front of which there are two symmetrically bent and turned to each other of the side wall of the holder, a curved L-shaped latch in the form of a plate is mounted in the holder, on the front side of which there is a tooth for interaction with the tongue hole and the hole In the case of the base of the holder, the upper part of the latch is provided with catching catching side walls with notches, and in the rear part of the latch there are lateral protrusions freely mounted in slots located in the side walls of the holder, a latch for locking the latch that can move parallel to itself and the base clips, freely moving in the oblong holes of the side walls of the clip under the action of the opening button, an ejector equipped with a spring and interacting with the tongue of the lock, and the spring an ixator for applying pressure to the latch, characterized in that the latch is additionally equipped with two support protrusions symmetrically located on its sides from the side of the latch tooth, the height of which is equal to or greater than the thickness of the latch and which are located between the center of gravity of the latch and the side protrusions so that they interact with a tongue ejector at a point located eccentric with respect to the center of gravity of the longitudinal axis of the latch.