CN219749579U - Automobile seat lock catch - Google Patents

Abstract

The utility model discloses an automobile seat lock catch, which comprises: the lower part of the connecting plate is rotationally connected with a safety piece and a comfort piece through a second pin, and the comfort piece is positioned at the outer side of the safety piece; the pawl is rotationally connected to the upper part of the connecting plate through a first pin, the middle part of the pawl is meshed with the comfort piece through a first meshing unit, a stopping protruding part protruding outwards is arranged on the pawl, and a stopping concave part is arranged on the safety piece; when the safety piece is subjected to abusive load, the stop protruding part is contacted with the stop recessed part, and the contact point of the stop protruding part and the stop recessed part, the center of the first pin column and the center of the second pin column form a triangular structure; and the dislocation preventing unit is arranged at the tail part of the comfort piece. The utility model can effectively shorten the whole lock catch unlocking stroke to a reasonable range, and can prevent parts from misplacement and unsmooth return. Meanwhile, the structure stability and the use safety of the lock catch can be improved, and the lock catch can be applied to various lock catch application occasions.

Description

Automobile seat lock catch

Technical Field

The utility model relates to the technical field of automobile seats, in particular to an automobile seat lock catch.

Background

The prior automobile seat backrest lock product has the problems of large unlocking stroke, large unlocking force and the like. Such as: the locking unit for a vehicle seat and the vehicle seat disclosed in CN107428262B are characterized in that the engagement portion of the comfort piece and the pawl, and the engagement portion of the safety piece and the pawl are the same, and the engagement portion is located relatively far from the rotation center of the pawl, which results in an excessively long entire latch unlocking stroke. In addition, existing latch products cannot withstand large unlocking abuse loads, and are limited in application.

Disclosure of Invention

Accordingly, there is a need for an automobile seat latch, comprising:

the lower part of the connecting plate is rotatably connected with a safety piece and a comfort piece through a second pin, and the comfort piece is positioned at the outer side of the safety piece;

the pawl is rotationally connected to the upper part of the connecting plate through a first pin, the middle part of the pawl is meshed with the comfort piece through a first meshing unit, a stopping protruding part protruding outwards is arranged on the pawl, and a stopping concave part is arranged on the safety piece; when the safety piece is subjected to abusive load, the stop protruding part is contacted with the stop recessed part, and the contact point of the stop protruding part and the stop recessed part, the center of the first pin column and the center of the second pin column form a triangular structure;

and the dislocation preventing unit is arranged at the tail part of the comfort piece, and when the lock catch is at the maximum unlocking stroke position, the dislocation preventing unit is overlapped with the pawl.

In one embodiment, the first engagement unit includes:

the bulge is arranged in the middle of the pawl;

an arcuate engagement profile disposed at an end of the comfort tab;

when the lock catch is in a locking state, the arc-shaped engagement profile is in contact with the left outer end face of the protrusion.

In one embodiment, the pawl is further provided with a hook portion, a clamping groove is formed in the hook portion, and when the lock catch is in a locking state, the clamping groove is clamped on the steel wire.

In one embodiment, the protrusion is shaped as a cam with a small diameter end in contact with the arcuate engagement profile.

In one embodiment, the arc-shaped engagement profile has a set length, and is always in contact with the protrusion when the pawl slides up and down in the vertical direction by a distance, wherein the arc-shaped engagement profile is an eccentric structure.

In one embodiment, the stopping protruding portion comprises a protruding block, two ends of the protruding block are respectively provided with an upper arc-shaped protruding lug and a lower arc-shaped protruding lug, the stopping recessed portion comprises an arc-shaped groove, and the upper arc-shaped protruding lug is matched with the arc-shaped groove.

In one embodiment, the dislocation preventing unit comprises a limiting block which is arranged on the comfort piece and protrudes outwards, and the limiting block is overlapped with the pawl when the lock catch is at the maximum unlocking stroke position.

In one embodiment, the pawl is provided with a pawl overmold on the exterior of the pawl.

In one embodiment, the connecting plate comprises a first connecting plate and a second connecting plate which are arranged at intervals, wherein a stop block is fixed on the middle part of the second connecting plate through a rivet, and the lower part of the second connecting plate is connected with the safety plate through a bushing and a safety plate torsion spring;

when the lock catch is in an unlocking state and no abusive load is applied, the stop block is abutted against the pawl plastic-coated piece, and a gap exists between the stop protruding portion and the stop recessed portion.

In one embodiment, the pawl and the safety tab are connected by a tension spring.

Above-mentioned car seat hasp, through setting up the meshing position of safety piece and comfortable piece and pawl in different positions, and make the meshing position of comfortable piece and pawl, be in the position relatively near from pawl rotation center to make whole hasp unblock stroke effectively shorten to reasonable scope, and, through setting up the dislocation prevention unit at the comfortable piece, ensure at the biggest unblock stroke position of hasp, still have enough overlap joint with the pawl, thereby can prevent the part dislocation, the return is unsmooth. Meanwhile, a stopping protruding portion is arranged on the pawl, a stopping concave portion is arranged on the safety piece, when the pawl is in an open state and is subjected to abusive force load, the stopping protruding portion is in contact with the stopping concave portion, and a triangular structure is formed by the contact point of the stopping protruding portion and the stopping concave portion, the center of the first pin column and the center of the second pin column, so that larger unlocking abusive load can be borne, the structural stability and the use safety of the locking device can be improved, and the locking device can be applied to various locking application occasions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of an automotive seat latch of the present utility model;

FIG. 2 is a rear view of the latch of the car seat latch of the present utility model;

FIG. 3 is a front view of the latch of the car seat latch of the present utility model;

FIG. 4 is a maximum unlocking travel state diagram of the car seat latch of the present utility model;

FIG. 5 is a cross-sectional view of the car seat latch of the present utility model;

FIG. 6 is a schematic illustration of the vehicle seat latch of the present utility model in a state in which no abuse load is applied;

fig. 7 is a schematic view of the vehicle seat latch of the present utility model in a state in which an abuse load is applied.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1-7, an embodiment of the present utility model provides an automobile seat latch, comprising:

the connecting plate 1, the lower part of the connecting plate 1 is rotatably connected with a safety sheet 3 and a comfort sheet 4 through a second pin 2, and the comfort sheet 4 is positioned on the outer side of the safety sheet 3;

a pawl 5 rotatably connected to the upper part of the coupling plate 1 via a first pin 6, wherein the middle part of the pawl 5 is engaged with the comfort piece 4 via a first engagement unit 7, the pawl 5 is provided with a stop boss 51 protruding outwards, and the safety piece 3 is provided with a stop recess 31; when the safety sheet 3 is subjected to abusive load, the stop protruding part 51 contacts with the stop recessed part 31, and the contact point of the stop protruding part 51 and the stop recessed part 31, the center of the first pin 6 and the center of the second pin 2 form a triangular structure;

and the dislocation preventing unit 8 is arranged at the tail part of the comfort piece 4, and when the lock catch is at the maximum unlocking stroke position, the dislocation preventing unit 8 is overlapped with the pawl 5.

Above-mentioned car seat hasp, through setting up the meshing position of safety piece 3 and comfortable piece 4 with pawl 5 in different positions, and make the meshing position of comfortable piece 4 and pawl 5 be in the position relatively near from pawl 5 rotation center to make whole hasp unblock stroke effectively shorten to reasonable scope, and, through setting up dislocation preventing unit 8 at comfortable piece 4, ensure at the biggest unblock stroke position of hasp, still have enough overlap joint with pawl 5, thereby can prevent the part dislocation, the return is unsmooth. Meanwhile, by arranging the stop protruding part 51 on the pawl 5 and arranging the stop recessed part 31 on the safety sheet 3, when the pawl 5 is in an open state and is subjected to abusive force load, the stop protruding part 51 is in contact with the stop recessed part 31, and the contact point of the stop protruding part 51 and the stop recessed part 31, the center of the first pin 6 and the center of the second pin 2 form a triangular structure, so that larger unlocking abusive load can be borne, the structural stability and the use safety of the safety sheet can be improved, and the safety sheet can be applied to various different locking and buckling application occasions.

In an embodiment of the present utility model, the first engagement unit 7 includes:

a projection 71 provided in the middle of the pawl 5;

an arcuate engagement profile 72 provided at an end of the comfort tab 4;

the arcuate engagement profile 72 contacts the left outer end surface of the projection 71 when the shackle is in the locked condition.

In this embodiment, the protrusion 71 is disposed at the middle of the pawl 5, and then is locked by the arc-shaped engagement profile 72 at the end of the comfort piece 4 cooperating with the protrusion 71, which can effectively shorten the unlocking stroke of the entire latch to a reasonable range.

In an embodiment of the present utility model, the pawl 5 is further provided with a hook portion 52, and a clamping groove 53 is formed in the hook portion 52, and when the lock catch is in a locked state, the clamping groove 53 is clamped on the steel wire 9.

In this embodiment, when the latch needs to be locked, the hook portion 52 may rotate downward, so that the clamping groove 53 is clamped on the steel wire 9 of the vehicle body, which may play a role in strengthening the locking of the pawl 5.

In one embodiment of the present utility model, the protrusion 71 is shaped as a cam, and the small diameter end of the cam contacts the arc-shaped engagement profile 72.

In this embodiment, the cam-type protrusion 71 is formed by overlapping two circles, one being larger and smaller, the small circle being used for precise engagement with the comfort plate 4, and the large circle being used for improving manufacturability of the overall structure of the pawl 5.

Alternatively, the arc-shaped engagement profile 72 has a set length, and the arc-shaped engagement profile 72 is always in contact with the protrusion 71 when the pawl 5 slides up and down in the vertical direction by a distance, wherein the arc-shaped engagement profile 72 has an eccentric structure.

When parts such as a stop block and a pin post wear due to durable service life, a larger clearance is generated in the OC direction by the steel wire 9 matched with the pawl 5, so that noise which is not wanted by a user is brought; the meshing profile 72 is of an eccentric structure, and when the movable gap is generated, the meshing part is wedged downwards to lift the pawl 5 upwards, so that the movable gap of the steel wire 9 is eliminated, and the generation source of noise is eliminated; the locking position of the wire 9 may float up and down in the design position, so that the engagement profile 72 must have a sufficient length to cover the floating range of the wire 9, which corresponds to the angle of the rotation center of the comfort piece 4, i.e. the unlocking angle.

In the conventional design, the engagement portion between the comfort plate 4 and the pawl 5 and the engagement portion between the safety plate 3 and the pawl 5 are the same, the engagement portion is far from the rotation center of the pawl 5 and is 1.6-2 times of the distance from the position of the steel wire 9 to the rotation center of the pawl 5, so that the fluctuation range of the engagement portion corresponding to the movement range of the steel wire 9 is enlarged, the arc engagement profile 72 must be long to cover the fluctuation range, and the unlocking angle cannot be small; thus, the distance from the engagement position of the comfort piece 4 with the pawl 5 to the rotation center of the pawl 5 is proportional to the lock release angle. In the utility model, the distance from the engaging point of the protrusion 71 and the arc engaging contour 72 to the rotation center of the pawl 5 is only 50% -60% of the distance from the stop protrusion 51 to the rotation center of the pawl 5, i.e. the rotation radius of the engaging part relative to the rotation center of the pawl 5 is reduced in a large proportion, so that the whole lock catch unlocking stroke can be shortened effectively.

In an embodiment of the present utility model, the stopping protrusion 51 includes a protrusion, two ends of the protrusion are respectively provided with an upper arc-shaped protrusion 511 and a lower arc-shaped protrusion 512, and the stopping recess 31 includes an arc-shaped groove 311, and the upper arc-shaped protrusion 511 is matched with the arc-shaped groove 311.

In this embodiment, the bump itself has a certain thickness and shape, and the upper arc-shaped lug 511 and the lower arc-shaped lug 512 are protruding parts of the bump, and can be integrally formed with the bump, so that the overall structural strength of the stop boss 51 can be increased, and the upper arc-shaped lug 511 and the arc-shaped groove 311 are matched with each other, which can be point contact or arc-shaped surface contact.

In one embodiment of the present utility model, the dislocation preventing unit 8 includes a stopper 81 disposed on the comfort plate 4 to protrude outward, and the stopper 81 is overlapped with the pawl 5 when the latch is in the maximum unlocking stroke position.

In this embodiment, through setting up the stopper 81 that extends in comfort piece 4 one side near pawl 5, ensure at the biggest unblock stroke position, still have enough overlap joint with pawl 5 to guarantee through mechanical system that the activity space of part is not interfered, prevent dislocation between the part, the return is unsmooth.

In one embodiment of the present utility model, the pawl 5 is provided with pawl molding 10 on the outside. In this way, the pawl 5 can be protected from interference with other components.

In an embodiment of the present utility model, the coupling plate 1 includes a first coupling plate 101 and a second coupling plate 102 that are disposed at intervals, a stopper 12 is fixed to the middle portion of the second coupling plate 102 through a rivet 11, and the lower portion of the second coupling plate 102 is connected to the safety plate 3 through a bushing 13 and a safety plate torsion spring 14;

when the lock catch is in an unlocked state and no abusive load is applied, the stop block 12 abuts against the pawl overmold 10, and the stop boss 51 is spaced from the stop recess 31.

In this embodiment, when the pawl 5 is not under abusive load, it is normally opened and stops on the stopper 12 together with the pawl overmold 10, and at this time, the stop protrusion 51 and the stop recess 31 have a gap, so that no metal collision noise is generated. When the pawl 5 is subjected to an abusive load in the open state, the pawl overmold 10 is deformed under load against the plastic stopper 12, but the deformation is very small, so that the deformation does not have a destructive effect on the functions of the pawl overmold 10 and the stopper 12, the stop boss 51 is overlapped with the stop recess 31, and the contact point of the stop boss 51 and the stop recess 31, the center of the first pin 6 and the center of the second pin 2 form a triangular structure. Alternatively, the pawl 5, the safety tab 3, the first pin 6 and the second pin 2 are steel heat treated pieces, which can bear strong loads.

In one embodiment of the utility model, the pawl 5 and the safety tab 3 are connected by a tension spring 15. This facilitates the interlocking of the pawl 5 and the safety tab 3. A washer 17 is also provided between the security pane 3 and the first pin 6 to adjust the position of the security pane 3. Optionally, the comfort piece 4 is provided with a spring driving rod 11, and in this embodiment, the locking position of the steel wire 9 may float up and down at the design position, so that a sufficient movable space needs to be reserved between the safety piece 3 and the spring driving rod 11.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The examples described above represent only a few embodiments of the present utility model and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An automotive seat latch, comprising:

the lower part of the connecting plate is rotatably connected with a safety piece and a comfort piece through a second pin, and the comfort piece is positioned at the outer side of the safety piece;

the pawl is rotationally connected to the upper part of the connecting plate through a first pin, the middle part of the pawl is meshed with the comfort piece through a first meshing unit, a stopping protruding part protruding outwards is arranged on the pawl, and a stopping concave part is arranged on the safety piece; when the safety piece is subjected to abusive load, the stop protruding part is contacted with the stop recessed part, and the contact point of the stop protruding part and the stop recessed part, the center of the first pin column and the center of the second pin column form a triangular structure;

and the dislocation preventing unit is arranged at the tail part of the comfort piece, and when the lock catch is at the maximum unlocking stroke position, the dislocation preventing unit is overlapped with the pawl.

2. The vehicle seat latch according to claim 1, wherein the first engagement unit includes:

the bulge is arranged in the middle of the pawl;

an arcuate engagement profile disposed at an end of the comfort tab;

when the lock catch is in a locking state, the arc-shaped engagement profile is in contact with the left outer end face of the protrusion.

3. The car seat latch of claim 2, wherein the pawl is further provided with a hook portion having a catch groove therein, the catch groove being caught on the wire when the latch is in the locked state.

4. A car seat latch as defined in claim 3, wherein said projection is cam-shaped with a small diameter end of the cam contacting said arcuate engagement profile.

5. The car seat latch of claim 4, wherein the arcuate engagement profile has a set length, the arcuate engagement profile always contacting the protrusion when the pawl slides vertically up and down a distance, wherein the arcuate engagement profile is an eccentric configuration.

6. The car seat latch of claim 1, wherein the stop boss includes a projection having upper and lower arcuate lugs at opposite ends, the stop recess including an arcuate recess, the upper arcuate lug being mated with the arcuate recess.

7. The vehicle seat latch according to claim 1, wherein said anti-misalignment unit includes an outwardly projecting stopper provided on said comfort tab, said stopper overlapping said pawl when the latch is in the maximum unlatch travel position.

8. The vehicle seat latch of claim 1 wherein the pawl is provided externally with a pawl overmold.

9. The car seat latch of claim 8, wherein the link plate includes a first link plate and a second link plate disposed at a spaced apart position, a stopper is fixed to a middle portion of the second link plate by a rivet, and a lower portion of the second link plate is connected to the safety plate by a bushing and a safety plate torsion spring;

when the lock catch is in an unlocking state and no abusive load is applied, the stop block is abutted against the pawl plastic-coated piece, and a gap exists between the stop protruding portion and the stop recessed portion.

10. The car seat latch of claim 1, wherein the pawl and the safety tab are connected by a tension spring.