CN209788674U - locking device and seat belt device - Google Patents

Abstract

the utility model discloses a locking device and seat belt device relates to the technical field who equips the seat belt device on the vehicle seat. The locking device is used for locking the safety belt spring bolt when the safety belt spring bolt is inserted into the locking device, wherein the base, the retainer and the button are matched with the base plate of the base; the locking plate is positioned in the button and can slide up and down along the retainer; the button is provided with a limiting piece which enables the locking plate to keep a locking state or a releasing state; the ejection body is positioned between the base and the base substrate and is in sliding fit with the base; one end of the ejection main body is used for being abutted against a safety belt lock tongue; the ejection spring is connected to the other end of the ejection main body; two ends of the locking plate spring are respectively abutted against the retainer and the locking plate; both ends of the button spring are respectively abutted against the holder and the button. This embodiment can reduce the part quantity and be convenient for the equipment, and the cost is reduced to reduced the risk that the catapult received the impact rupture, and can prevent the emergence of the mistake locking condition.

Description

locking device and seat belt device

Cross Reference to Related Applications

the present application claims priority from the following chinese patent applications: ZL 201920384732.3 filed on 25/3/2019, the disclosure of which is incorporated herein by reference in its entirety.

Technical Field

The utility model relates to a equip the technical field of the safety belt device on vehicles's seats such as car, concretely relates to locking device and seat safety belt device.

background

the safety belt device is arranged on a vehicle seat such as an automobile, and in order to restrain a passenger through the safety belt device when collision or vehicle acceleration changes obviously, inertia movement is effectively reduced, and safety of the passenger is effectively protected. A typical seat belt apparatus includes a seat belt latch and a seat belt buckle that is capable of cooperating with the latch to perform an insertion and release function.

at present, when the lock tongue is inserted into the lock catch obliquely, in order to obtain a good feeling of inserting the lock tongue, there are two patents of CN102985298A and JP2002347575A, and comfort is obtained by self-adaptive rotation of the lock tongue when inserting.

in the course of implementing the present invention, the inventor finds that the above-mentioned operation mode has the following disadvantages:

1. The prior design structure is complex, the assembly is difficult, and the production cost is high;

2. the ejector mentioned in the patent CN103582436A is fixed to other parts by a barb structure at the end of the long arm, has a small contact area, and is at risk of deformation or breakage when subjected to a large impact.

SUMMERY OF THE UTILITY MODEL

for the structure of solving among the prior art is more complicated, the equipment is more difficult, and manufacturing cost is higher to and the catapult has the problem of warping or the risk of breaking, the utility model provides a locking device and seat belt device can reduce part quantity and be convenient for assemble, realizes light weight reduce cost, has effectively reduced the risk that the catapult broke when receiving the big impact simultaneously to can prevent the emergence of the mistake locking condition.

to achieve the above object, according to one aspect of the embodiments of the present invention, a locking device is provided.

The utility model discloses locking device for when the safety belt spring bolt that is connected with the seat belt inserts locking device in, will safety belt spring bolt locking, including base, ejection spring, catapult, base plate, holder, locking plate spring, button and button spring, the catapult including launch the main part and connect in launch the long arm portion of main part both sides, wherein:

The base, the retainer, the button and the base substrate are matched;

the locking piece is positioned in the button and can slide up and down along the retainer;

The button is provided with a limiting piece which enables the lock plate to keep a locking state or a releasing state;

the ejection body is positioned between the base and the base substrate and is in sliding fit with the base; one end of the ejection body is used for abutting against the safety belt lock tongue; the long arm parts are positioned on two sides of the base;

the ejection spring is connected to the other end of the ejection main body;

Two ends of the lock plate spring are respectively abutted against the retainer and the lock plate;

Both ends of the button spring are respectively abutted against the holder and the button.

optionally, a slotted hole is formed in the upper part of the locking plate, and the lower end of the locking plate spring is located in the slotted hole;

Trapezoidal bosses are arranged on two sides of the locking plate, the bottoms of the trapezoidal bosses comprise boss inclined planes and boss bottom surfaces, the tops of the trapezoidal bosses comprise boss top surfaces, the boss top surfaces are in contact with the limiting part when the locking plate is kept in a locking state, and the boss bottom surfaces are in contact with the limiting part when the locking plate is kept in a dissociation state;

the bottom of the locking plate is provided with an inclined plane.

optionally, the upper part of the holder is provided with a stop;

a convex point is arranged in the retainer and connected with the stopping part, and the upper end of the locking plate spring is sleeved on the convex point;

A protruding part is arranged outside the retainer, and one end of the button spring is sleeved on the protruding part;

the bottom of the retainer is provided with a limiting element which is matched with the base substrate.

optionally, the base substrate is provided with a guide groove and a first spring groove, the guide groove comprises a front end of the guide groove, and one end of the first spring groove is provided with a first protrusion;

Limiting grooves are formed in two sides of the base plate and matched with the limiting elements;

and limiting blocks are arranged on two sides of the base substrate.

optionally, the limiting groove comprises an end limiting groove and a side limiting groove, the limiting element comprises a bottom limiting element and a side limiting element,

the bottom limiting element is matched with the end limiting groove, and the side limiting element is matched with the side limiting groove.

optionally, the top of the button is provided with a contour hole, and the other end of the button spring abuts against one side of the contour hole of the button;

The middle part of the button is provided with a guide plate, the guide plate is provided with a sliding trapezoidal edge, the sliding trapezoidal edge comprises a guiding inclined edge and a guiding horizontal plane, the guiding inclined edge is parallel to the inclined plane of the boss, and the guiding horizontal plane is parallel to the bottom surface of the boss;

the bottom of button is provided with spacing portion and trigger mechanism, trigger mechanism is located first spring inslot, trigger mechanism be used for with the catapult cooperation makes locating part with the locking plate separation.

optionally, the limiting part includes a front limiting part and a rear limiting part located on two sides of the bottom of the button, the rear limiting part is slidably connected to the base plate, and the front limiting part is used for cooperating with the limiting part to limit the distance that the rear limiting part moves towards the pulling direction of the seat belt lock tongue;

the locating part includes upper edge and lower breach edge, the upper edge is in when the locking plate keeps the dissociation state with boss bottom surface contact, lower breach edge is in when the locking plate keeps the locking state with boss top surface contact.

Optionally, the two sides of the base are provided with folded parts, the length of the folded parts is smaller than that of the guide grooves, and the folded parts penetrate through the guide grooves to be matched with the retainer and the button;

the folding part comprises a clamping groove, a guide groove and a supporting part, the clamping groove is matched with the front end of the guide groove, the guide groove is matched with the ejector, and the supporting part supports the base substrate;

a second spring groove is formed in the middle of the base, and a second bulge is formed at one end of the second spring groove;

The ejection spring is located in the second spring groove and the first spring groove, one end of the ejection spring is abutted to the ejector, and the other end of the ejection spring is sleeved on the second protrusion and the first protrusion.

Optionally, the ejector further comprises a bend and a recess, wherein:

the bent part and the concave part are positioned in the guide groove, and the bent part and the concave part can slide along the guide groove;

the ejection main body is connected with the bent part through the concave part, and the extending direction of the bent part is opposite to the inserting direction of the safety belt lock tongue;

The ejection body is connected to the long arm portion through the recess, and the long arm portion can restrict the sliding of the front end restriction portion on the base plate when the seatbelt lock tongue is not inserted into the buckle device.

Optionally, the base is integrally formed with the folded portion;

The ejector is made of plastic materials, and the ejection main body, the bent part, the concave part and the long arm part are integrally formed;

The retainer is integrally formed with the stopper portion, the protruding point, the protruding portion and the limiting element;

the locking plate is made of metal materials, and the locking plate and the trapezoidal boss are integrally formed;

the button is integrally formed with the guide plate, the limiting member, and the limiting portion.

optionally, the ejection body comprises a support surface and a projection, wherein:

the supporting surface is used for abutting against the safety belt lock tongue;

the projection is connected with the ejection spring.

optionally, the apparatus further comprises a shock-proof block, wherein:

The shockproof block is connected to the bottom of the button.

To achieve the above object, according to still another aspect of an embodiment of the present invention, there is provided a seat belt device.

the utility model discloses a seat belt device is including the seat belt, direction fixer, safety belt coiler, the safety belt spring bolt that are used for restricting the passenger and the utility model discloses the locking device of embodiment.

An embodiment in the above-mentioned utility model has following advantage or beneficial effect: different switching of the locking plate between a locking state and a releasing state is realized through a profiling channel structure formed between the retainer and the button, and the locking and releasing functions are realized; the base, the retainer, the button and the base substrate can be assembled and positioned through the matching between the limiting elements and the limiting grooves on the base, so that the number of parts is reduced, the assembly is convenient, and the light weight and the cost are reduced. The bending long arm structure of the ejector effectively reduces the risk of breakage of the ejector when the ejector is subjected to large impact; when the button is pressed when no lock tongue is inserted, the front limit part of the button can be abutted with the end part of the long arm part of the ejector, so as to prevent the occurrence of false locking

drawings

fig. 1 is a schematic view of a locking device according to an embodiment of the present invention;

Fig. 2 is a schematic view of a base of a locking device according to an embodiment of the present invention;

fig. 3 is a schematic view of a base substrate of a locking device according to an embodiment of the present invention;

fig. 4A is a first schematic view of a retainer of a latching device according to an embodiment of the present invention;

fig. 4B is a second schematic view of a retainer of a latching device according to an embodiment of the present invention;

Fig. 5A is a first schematic view of a locking plate of a locking device according to an embodiment of the present invention;

Fig. 5B is a second schematic view of a locking plate of a locking device according to an embodiment of the present invention;

fig. 6A is a first schematic view of a button of a locking device according to an embodiment of the present invention;

fig. 6B is a second schematic view of a button of a locking device according to an embodiment of the present invention;

Fig. 7 is a schematic view of an ejector of a locker assembly according to an embodiment of the present invention;

fig. 8A is a first assembly view of a locking device according to an embodiment of the present invention;

fig. 8B is a second assembly view of a locking device according to an embodiment of the present invention;

Fig. 8C is a third schematic view illustrating an assembly of a locking device according to an embodiment of the present invention;

fig. 8D is a fourth schematic view illustrating an assembly of a locking device according to an embodiment of the present invention;

fig. 8E is a schematic assembly diagram of a locking device according to an embodiment of the present invention;

fig. 8F is a sixth schematic view illustrating an assembly of a locking device according to an embodiment of the present invention;

Fig. 8G is a seventh assembly schematic view of a locking device according to an embodiment of the present invention;

Fig. 8H is an assembly schematic view eight of a locking device according to an embodiment of the present invention;

fig. 8I is a schematic view illustrating an assembly of a locking device according to an embodiment of the present invention;

fig. 9A is a schematic view of a locking plate in a locked state of the locking device according to an embodiment of the present invention;

fig. 9B is a schematic view of a locking plate in an unlocked state of the locking device according to an embodiment of the present invention.

In the figure, the position of the upper end of the main shaft,

1-a seat belt latch;

2-a shock-proof block;

3-a base; 31-a fold-up portion; 311-card slot; 312-a guide slot; 313-a support; 32-a second spring groove; 321-a second protrusion;

4-ejection spring;

5-a catapult; 51-an ejection body; 511-a support surface; 512-a projection; 52-a bending part; 53-a recess; 54-long arm;

6-a base substrate; 61-a limit groove; 611-end limiting groove; 612-lateral restraint slot; 62-a limiting block; 63-a guide groove; 631-guide groove front end; 64-a first spring groove; 641-a first bump;

7-a holder; 71-a stop; 72-salient points; 73-a projection; 74-a stop element; 741-a bottom stop element; 742-side stop element;

8-locking plate; 81-slotted hole; 82-trapezoidal boss; 821-boss inclined plane; 822-bottom surface of boss; 823-top surface of boss; 83-inclined plane;

9-a locking plate spring;

10-a button; 101-section hole; 102-a guide plate; 1021-a slide-shaped edge; 10211-hypotenuse; 10212-guide level; 103-a stop; 1031-upper edge; 1032-lower notch edge; 104-a limiting part; 1041-a front end restriction; 1042-a rear limit part; 105-a trigger mechanism;

11-button spring.

Detailed Description

exemplary embodiments of the invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

Fig. 1 is a schematic view of a locking device according to an embodiment of the present invention. The embodiment of the utility model provides a locking device is used for cooperating with safety belt spring bolt 1, as shown in fig. 1, the embodiment of the utility model provides a locking device mainly includes: base 3, ejection spring 4, ejector 5, base substrate 6, holder 7, locking tab 8, locking tab spring 9, button 10, and button spring 11. The retainer 7, the button 10 and the base substrate 6 can be assembled and positioned through the matching between the limiting element and the limiting groove on the retainer, the base 3 and the base substrate 6 can also be assembled and positioned through the matching between the limiting element and the limiting groove on the base, and the locking plate 8 can be switched between a locking state and a dissociation state through a copying channel structure formed between the retainer 7 and the button 10, so that the locking and dissociation functions are realized, the number of parts is reduced, the light weight is realized, and the assembly and the cost are reduced.

as shown in fig. 1, 8A to 9B, the base 3, the holder 7, and the button 10 are respectively engaged with the base substrate 6, the holder 7, the base substrate 6, and the base 3 are relatively fixed, and the button 10 is movable relative to the base 3, the base substrate 6, and the holder 7 as a whole. The locking plate 8 is located in the button 10, the locking plate 8 can slide up and down along the retainer 7, a limiting member 103 is arranged in the button 10, the limiting member 103 is used for limiting the movement of the locking plate 8, when the seat belt lock tongue 1 is not inserted into the locking device, the limiting member 103 is located in the middle of the locking plate 8, and at the moment, the locking plate 8 is located at a dissociation position (i.e. the locking plate 8 is in a dissociation state); after the seat belt latch 1 is inserted into the locking device, the limiting member 103 is located above the locking plate 8, and the locking plate 8 is located at the locking position (i.e., the locking plate 8 maintains the locking state). The ejector 5 is slidably connected to the base 3, one end of the ejector 5 is used for abutting against the safety belt lock tongue 1, the other end of the ejector 5 is connected with the ejection spring 4, when the safety belt lock tongue 1 is not inserted into the locking device, the ejector 5 is positioned below the lock plate 8, and the lock plate 8 is positioned at the dissociation position (even if the lock plate 8 is kept in the dissociation state); after the seat belt latch 1 is inserted into the locking device, the ejector 5 is located on the side of the locking plate 8, and the locking plate 8 is located at the locking position (i.e., the locking plate 8 is in the locking state). The both ends of locking plate spring 9 respectively with keep ware 7 and locking plate 8 butt, locking plate spring 9 applys the effort to the locking position to locking plate 8, and locking plate spring 9's effort is used for making locking plate 8 be in the locking state after safety belt spring bolt 1 inserts in the locking device promptly. Both ends of the button spring 11 abut against the holder 7 and the button 10, respectively.

when the safety belt lock tongue 1 is inserted into the locking device, the safety belt lock tongue 1 abuts against the ejector 5 and compresses the ejection spring 4, when the safety belt lock tongue 1 reaches the innermost end of the locking device, the ejector 5 abuts against the lower end of the button 10 and pushes the button 10 inwards, the limiting part 103 of the button 10 is made to leave the middle part of the lock plate 8, the lock plate 8 is moved to the locking position under the action of the lock plate spring 9 and then enters the bayonet of the safety belt lock tongue 1, at the moment, the ejector 5 moves outwards under the action of the ejection spring 4, meanwhile, the button 10 also moves towards the pulling-out direction of the safety belt lock tongue 1 under the action of the button spring 11 and returns to the original position, the limiting part 103 reaches the upper part of the lock plate 8 to fix the lock plate 8 at the locking position, and then the. When button 10 (inwards push button 10) is pressed at the locking state, button 10 upwards pushes locking plate 8, and locating part 103 leaves the top of locking plate 8 simultaneously, and ejector 5 outwards removes under the effect of ejection spring 4 to continue upwards pushing locking plate 8, make locking plate 8 leave the bayonet socket of safety belt spring bolt 1, thereby remove the locking to safety belt spring bolt 1, release and press button 10 after, locating part 103 reachs the middle part of locking plate 8 once more, fix locking plate 8 in the position of dissociating.

In the embodiment of the utility model, still include shockproof piece 2, shockproof piece 2 connect in the bottom of button 10, shockproof piece 2 is as the counter weight, can reduce ejection spring 4, locking plate spring 9 and button spring 11 because of the impact that the vibration that produces caused locking device in flexible process. It should be noted that the vibration-proof block 2 is not an essential component, and may be selected according to actual conditions.

As shown in fig. 2 and 8D, the base 3 is provided at both sides thereof with folded portions 31, the length of the folded portion 31 is smaller than that of the guide groove 63, the folded portion 31 includes a locking groove 311, a guide groove 312 and a support portion 313, the base 3 is provided at a middle portion thereof with a second spring groove 32, and one end of the second spring groove 32 is provided with a second protrusion 321.

as shown in fig. 3, the base substrate 6 is provided with a guide groove 63 and a first spring groove 64, the guide groove 63 includes a guide groove front end 631, one end of the first spring groove 64 is provided with a first protrusion 641, both sides of the base substrate 6 are provided with a limit groove 61, the limit groove 61 includes an end limit groove 611 and a side limit groove 612, and both sides of the base substrate 6 are provided with limit blocks 62.

as shown in fig. 4A and 4B, the upper portion of the holder 7 is provided with a stopper portion 71, the inside of the holder 7 is provided with a protruding point 72, the protruding point 72 is in contact with the stopper portion 71, the outside of the holder 7 is provided with a protruding portion 73, and the bottom of the holder 7 is provided with a stopper element 74, the stopper element 74 including a bottom stopper element 741 and a side stopper element 742.

as shown in fig. 5A and 5B, the upper portion of the locking plate 8 is provided with a slot 81, both sides of the locking plate 8 are provided with trapezoidal bosses 82, the bottom of the trapezoidal boss 82 includes a boss inclined surface 821 and a boss bottom surface 822, the top of the trapezoidal boss 82 further includes a boss top surface 823, and the bottom of the locking plate 8 is provided with an inclined surface 83.

As shown in fig. 6A and 6B, the top of the button 10 is provided with a contour hole 101, the middle of the button 10 is provided with a guide plate 102, the guide plate 102 is provided with a slide-shaped edge 1021, and the slide-shaped edge 1021 comprises a guide inclined edge 10211 and a guide horizontal plane 10212, the guide inclined edge 10211 is parallel to the boss inclined plane 821, the guide horizontal plane 10212 is parallel to the boss bottom plane 822, a limiting member 103 is arranged in the button 10, the limiting member 103 comprises an upper edge 1031 and a lower notch edge 1032, the bottom of the button 10 is provided with a limiting portion 104 and a trigger mechanism 105, and the limiting portion 104 comprises a front limiting portion 1041 and a rear limiting portion 1042 at both sides of the bottom of the button 10.

as shown in fig. 7, the ejector 5 includes an ejection body 51, a bent portion 52, a concave portion 53, and a long arm portion 54, the ejection body 51 includes a support surface 511 and a protruding portion 512, the ejection body 51 is connected to the bent portion 52 through the concave portion 53, and the ejection body 51 is connected to the long arm portion 54 through the concave portion 53. The long arm 54 limits the sliding of the button 10 on the base plate 6 when the seat belt tongue 1 is not inserted into the buckle device.

referring to fig. 7-9B, the risk of breakage of the ejector 5 due to a large impact is effectively reduced by the bent long arm structure of the ejector 5. Meanwhile, the design of the bent long arm structure prevents the occurrence of an erroneous locking condition by pressing the button 10 when no latch tongue is inserted, and the front end limit portion 1041 of the button 10 abuts against the end portion of the long arm portion 54 of the ejector 5.

when the seat belt latch 1 is not inserted into the buckle device (i.e., the buckle device is in a buckle release state), the concave portion 53 of the ejector 5 is tightly attached to the inner side of the guide groove 312 of the base 3 under the action of the ejector spring 4; meanwhile, when the button 10 is pressed in the state where the latch is released, the long arm 54 of the ejector 5 abuts against the front end stopper 1041 of the button 10, that is, in this state, one side of the front end stopper 1041 abuts against the stopper 62 and the other side abuts against the long arm 54. After the seat belt tongue 1 is inserted into the buckle device (i.e., the buckle device is in the buckle locked state), the seat belt tongue 1 is in close contact with the support surface 511 of the ejector 5, the concave portion 53 is separated from the inner side of the guide groove 312, and the ejection spring 4 is compressed at one end of the protruding portion 512 of the ejector 5.

in the embodiment of the present invention, the extending direction of the bending portion 52 is opposite to the inserting direction of the seat belt latch 1, and the supporting surface 511 is arc-shaped or groove-shaped so as to abut against the seat belt latch 1. The ejection body 51, the bent portion 52, the recess 53, and the long arm portion 54 may be provided as an integral molding, and the ejector 5 may be made of a plastic material, such as polyoxymethylene resin (POM) or polypropylene (PP).

It should be noted that, other structures may be further disposed on the above components according to the assembly or use requirements, and the embodiments of the present invention are not described in detail.

Further, the base 3 and the folded portion 31 may be provided as an integral molding. The holder 7, the stopper portion 71, the protruding point 72, the protruding portion 73, and the stopper element 74 may be provided as an integral part. The locking plate 8 is made of metal material, and the locking plate 8 and the trapezoid boss 82 can be integrally formed. The push button 10 may be integrally formed with the guide plate 102, the stopper 103, and the stopper 104.

Furthermore, the embodiment of the present invention further provides a seat belt device (not shown in the drawings), which may include a seat belt for restraining a passenger, a guiding fixer, a belt retractor, a belt latch 1 and a buckle device of the embodiment of the present invention.

To seat belt, direction fixer, safety belt coiler, safety belt spring bolt 1 and the installation of locking device on the vehicle, can refer to prior art's mounting means, the embodiment of the utility model provides a do not give unnecessary details.

As shown in fig. 8A-8I, the latching device of the embodiment of the present invention can be assembled by referring to the following processes:

1) the button 10 is mounted on the base substrate 6:

the rear-end limiting portions 1042 of the button 10 are slidably connected to the base substrate 6, that is, the base substrate 6 is clamped by the rear-end limiting portions 1042 at both sides, so that the button 10 can slide along the base substrate 6, and the movement distance of the button 10 in the pulling direction of the seat belt latch 1 is limited by the cooperation of the limiting blocks 62 and the front-end limiting portions 1041, and the trigger mechanism 105 is located in the first spring groove 64;

2) the holder 7 is mounted on the base substrate 6:

the retainer 7 is mounted on the base substrate 6 from the button 10 side, so that the retainer 7 and the base substrate 6 are fixedly mounted together, wherein the bottom stopper element 741 of the retainer 7 is engaged with the end stopper groove 611, and the side stopper element 742 is engaged with the side stopper groove 612;

3) installing the button spring 11:

one end of the button spring 11 is sleeved on the protruding part 73; the other end of the button spring 11 abuts against one side of the profiling hole 101 of the button 10;

4) The holder 7, the button 10 and the base substrate 6 are mounted on the base 3 as a whole:

The folded part 31 of the base 3 passes through the guide groove 63 to be matched with the retainer 7 and the button 10, the retainer 7 and the button 10 are supported by the folded part 31, and a clamping groove 311 (not shown in the figure) of the folded part 31 is matched with a front end 631 (not shown in the figure) of the guide groove, so that the base substrate 6 is pushed backwards and clamped in parallel to the base 3, and the base substrate 6 is supported by a supporting part 313;

5) and (3) loading the locking plate spring 9 and the locking plate 8:

the locking plate spring 9 and the locking plate 8 can be arranged in the first spring groove 64 through the second spring groove 32, the upper end of the locking plate spring 9 is sleeved on the salient point 72, and the lower end of the locking plate spring 9 is positioned in the slotted hole 81;

6) loading the ejection block 5 and the ejection spring 4:

the ejection block 5 is installed between the base 3 and the base substrate 6, the ejection body 51 of the ejector 5 is located between the two folded portions 31, the support surface 511 of the ejection body 51 is used for abutting against the seat belt latch 1, the long arm portion 54 is located outside the two folded portions 31, the bent portion 52 and the concave portion 53 are located in the guide groove 312, that is, the ejection body 51, the bent portion 52, the concave portion 53 and the long arm portion 54 can slide along the guide groove 312; the ejection spring 4 is located in the second spring groove 32 and the first spring groove 64, one end of the ejection spring 4 abuts against the protrusion 512, and the other end of the ejection spring 4 is sleeved on the second protrusion 321 and the first protrusion 641, that is, the ejection spring 4 is compressed at the end of the ejector 5, and applies an acting force to the ejector 5 opposite to the insertion direction of the seat belt latch 1;

7) and (3) loading a shockproof block 2:

a vibration prevention block 2 (not shown) is attached to the bottom of the button 10.

Next, a locking process of the locking device will be described, which can be divided into the following processes:

1) The belt tongue 1 starts to insert:

the safety belt bolt 1 is pushed into the locking device, at the moment, the safety belt bolt 1 is contacted with the supporting surface 511 of the ejector 5, the ejection spring 4 is not compressed, the bottom end of the locking plate 8 is contacted with the ejector 5, and the bottom surface 822 of the lug boss of the locking plate 8 is clung to the upper edge 1031 of the button 10;

2) the belt latch 1 begins to compress the ejection spring 4:

The safety belt bolt 1 pushes the ejector 5 into the locking device, the safety belt bolt 1 and the ejector 5 start to compress the ejection spring 4, but the bottom end of the locking plate 8 keeps in contact with the ejector 5, the contact position is close to one side of the supporting surface 511 from the middle part of the ejection main body 51, and the bottom surface 822 of the boss is still attached to the upper edge 1031;

3) the belt latch 1 further compresses the ejector spring 4:

the ejector spring 4 is further compressed and the shoulder of the ejector 5 is in contact with the trigger mechanism 105 of the button 10 (at which point the trigger point is reached but the locking tab 8 has not fallen);

4) pushing the button 10 into the locker:

After the trigger point is reached, the safety belt lock tongue 1 and the ejector 5 continue to compress the ejection spring 4, the ejector 5 pushes the trigger mechanism 105 into the locking device, so as to drive the button 10 to move into the locking device until the bottom surface 822 of the boss is still attached to the upper edge 1031 and separated, and the locking plate spring 9 pushes the locking plate 8 to fall down to enter the bayonet of the safety belt lock tongue 1;

5) locking the belt tongue 1:

The belt tongue 1 stops being pushed, the belt tongue 1 is loosened, the ejection spring 4 applies elastic force to the ejector 5, the ejector 5 is pushed in the belt tongue 1 pulling direction, the belt tongue 1 is in contact with the lock plate 8, the button 10 moves in the belt tongue 1 pulling direction under the action of the button spring 11, the boss top surface 823 of the lock plate 8 is in contact with the lower notch edge 1032 of the button 10, and the boss bottom surface 822 is in contact with the guide horizontal plane 10212 (as shown in fig. 9A), and the belt tongue 1 is locked in the buckle device.

next, an unlocking process of the locking device will be described, which can be divided into the following processes:

1) pressing the button 10:

When the button 10 is pressed (i.e., the button 10 is pushed inward), the lower notch edge 1032 of the button 10 is separated from the boss top surface 823 of the locking piece 8;

2) Lifting the locking plate 8:

because the locking plate 8 is located in the retainer 7, and the retainer 7 is fixed on the base substrate 6, the locking plate 8 is relatively fixed in the inserting or pulling direction of the seat belt lock tongue 1, the button 10 is pushed inwards to make the bevel guide edge 10211 contact with the inclined surface 821 of the boss, the horizontal guide surface 10212 contact with the bottom surface 822 of the boss, the button 10 is pushed inwards continuously to make the locking plate 8 slide along the bevel guide edge 10211, namely the locking plate 8 starts to leave the bayonet of the seat belt lock tongue 1, and when the inclined surface 83 of the locking plate 8 contacts with the lock tongue 1, the unlocking point is reached;

3) The ejector block 5 pushes the belt latch 1:

After the release point is reached, the ejection block 5 moves towards the pulling direction of the safety belt lock tongue 1 under the action of the ejection spring 4 and pushes the safety belt lock tongue 1 to be pulled out, the lock plate 8 gradually leaves the bayonet of the safety belt lock tongue 1, and the safety belt lock tongue 1 is pulled out from the locking device;

4) the bottom end of the locking plate 8 is contacted with the ejector 5:

After the safety belt lock tongue 1 is pulled out from the locking device, the bottom end of the lock plate 8 is contacted with the ejector 5, the ejector 5 moves towards the pulling direction of the safety belt lock tongue 1 under the action of the ejection spring 4, finally, the concave part 53 of the ejector 5 is tightly attached to the inner side of the guide groove 312 of the base 3, and the bottom end of the lock plate 8 is contacted with the ejector 5;

5) Releasing the button 10:

When the push button 10 is released, the push button 10 is moved in the direction of pulling out the seat belt latch 1 by the push button spring 11, and the upper edge 1031 of the push button 10 comes into contact with the bottom surface 822 of the boss of the lock plate 8, and returns to the unlocked state (see fig. 9B).

as can be seen from the above description, the latch device of the embodiment of the present invention has at least the following advantages:

The locking and unlocking functions are realized by realizing different switching of the locking plate 8 between a locking state and a releasing state through a profiling channel structure formed between the retainer 7 and the button 10;

The base 3, the retainer 7, the button 10 and the base substrate 6 can be assembled and positioned through the matching between the limiting elements and the limiting grooves on the base, so that the number of parts is reduced, the assembly is convenient, the light weight and the cost are reduced;

the risk of breakage of the ejector 5 under large impact is effectively reduced through the bending long arm structure of the ejector 5;

when the push button 10 is pushed without a latch tongue being inserted, the distal end stopper 1041 of the push button 10 abuts against the end of the long arm 54 of the ejector 5, thereby preventing the occurrence of an erroneous locking.

the above is only a preferred embodiment of the present invention, and should not be limited to the present invention, and any modifications, equivalent replacements, simple improvements and the like made in the spirit of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A buckle device for locking a seat belt tongue (1) to which a seat belt is connected when the seat belt tongue (1) is inserted into the buckle device, comprising a base (3), an ejector (4), a ejector (5), a base substrate (6), a holder (7), a lock plate (8), a lock plate spring (9), a button (10), and a button spring (11), the ejector (5) comprising an ejector main body (51) and long arm portions (54) connected to both sides of the ejector main body (51), wherein:

The base (3), the retainer (7), the button (10) and the base substrate (6) are matched;

the locking piece (8) is positioned in the button (10), and the locking piece (8) can slide up and down along the retainer (7);

the button (10) is provided with a limiting piece (103) which enables the locking piece (8) to keep a locking state or a releasing state;

the ejection body (51) is positioned between the base (3) and the base substrate (6), and the ejection body (51) is in sliding fit with the base (3); one end of the ejection body (51) is used for abutting against the safety belt bolt (1); the long arm parts (54) are positioned at two sides of the base (3);

the ejection spring (4) is connected to the other end of the ejection body (51);

Two ends of the locking plate spring (9) are respectively abutted against the retainer (7) and the locking plate (8);

both ends of the button spring (11) are respectively abutted against the holder (7) and the button (10).

2. the snapping device of claim 1,

the upper part of the locking plate (8) is provided with a slotted hole (81), and the lower end of the locking plate spring (9) is positioned in the slotted hole (81);

trapezoidal bosses (82) are arranged on two sides of the locking plate (8), the bottom of each trapezoidal boss (82) comprises a boss inclined surface (821) and a boss bottom surface (822), the top of each trapezoidal boss (82) comprises a boss top surface (823), each boss top surface (823) is in contact with the corresponding limiting piece (103) when the locking plate (8) is kept in a locking state, and each boss bottom surface (822) is in contact with the corresponding limiting piece (103) when the locking plate (8) is kept in a dissociation state;

the bottom of the locking plate (8) is provided with an inclined surface (83).

3. the snapping device of claim 2,

a stopping part (71) is arranged at the upper part of the retainer (7);

a convex point (72) is arranged in the retainer (7), the convex point (72) is connected with the stopping part (71), and the upper end of the locking plate spring (9) is sleeved on the convex point (72);

A protruding part (73) is arranged outside the retainer (7), and one end of the button spring (11) is sleeved on the protruding part (73);

the bottom of the retainer (7) is provided with a limiting element (74), and the limiting element (74) is matched with the base substrate (6).

4. A locker according to claim 3,

the base substrate (6) is provided with a guide groove (63) and a first spring groove (64), the guide groove (63) comprises a guide groove front end (631), and one end of the first spring groove (64) is provided with a first bulge (641);

Limiting grooves (61) are formed in two sides of the base substrate (6), and the limiting grooves (61) are matched with the limiting elements (74);

and two sides of the base substrate (6) are provided with limiting blocks (62).

5. The snapping device of claim 4,

The limiting groove (61) comprises an end limiting groove (611) and a side limiting groove (612), the limiting element (74) comprises a bottom limiting element (741) and a side limiting element (742),

the bottom limiting element (741) is engaged with the end limiting groove (611), and the side limiting element (742) is engaged with the side limiting groove (612).

6. the snapping device of claim 4,

the top of the button (10) is provided with a contour hole (101), and the other end of the button spring (11) abuts against one side of the contour hole (101) of the button (10);

a guide plate (102) is arranged in the middle of the button (10), a slide-shaped edge (1021) is arranged on the guide plate (102), the slide-shaped edge (1021) comprises a guide inclined edge (10211) and a guide horizontal plane (10212), the guide inclined edge (10211) is parallel to the boss inclined plane (821), and the guide horizontal plane (10212) is parallel to the boss bottom surface (822);

the bottom of button (10) is provided with spacing portion (104) and trigger mechanism (105), trigger mechanism (105) are located in first spring groove (64), trigger mechanism (105) be used for with catapult (5) cooperation makes locating part (103) with locking plate (8) separation.

7. a locker according to claim 6,

the limiting part (104) comprises a front end limiting part (1041) and a rear end limiting part (1042) which are positioned on two sides of the bottom of the button (10), the rear end limiting part (1042) is connected to the base plate (6) in a sliding mode, and the front end limiting part (1041) is used for being matched with the limiting part (62) to limit the distance of the rear end limiting part (1042) moving towards the pulling direction of the safety belt lock tongue (1);

the limiting piece (103) comprises an upper edge (1031) and a lower notch edge (1032), the upper edge (1031) is in contact with the boss bottom surface (822) when the locking plate (8) is kept in the dissociation state, and the lower notch edge (1032) is in contact with the boss top surface (823) when the locking plate (8) is kept in the locking state.

8. the snapping device of claim 7,

two sides of the base (3) are provided with folded parts (31), the length of each folded part (31) is smaller than that of the guide groove (63), and the folded parts (31) penetrate through the guide grooves (63) to be matched with the retainer (7) and the button (10);

The folding part (31) comprises a clamping groove (311), a guide groove (312) and a supporting part (313), the clamping groove (311) is matched with the front end (631) of the guide groove, the guide groove (312) is matched with the ejector (5), and the supporting part (313) supports the base substrate (6);

A second spring groove (32) is formed in the middle of the base (3), and a second protrusion (321) is arranged at one end of the second spring groove (32);

the ejection spring (4) is located in the second spring groove (32) and the first spring groove (64), one end of the ejection spring (4) is abutted to the ejector (5), and the other end of the ejection spring (4) is sleeved on the second protrusion (321) and the first protrusion (641).

9. a latching arrangement according to claim 8, characterized in that the ejector (5) further comprises a fold (52) and a recess (53), wherein:

the bent part (52) and the concave part (53) are positioned in the guide groove (312), and the bent part (52) and the concave part (53) can slide along the guide groove (312);

the ejection body (51) is connected with the bent part (52) through the concave part (53), and the extending direction of the bent part (52) is opposite to the inserting direction of the safety belt bolt (1);

the ejector body (51) and the long arm portion (54) are connected by the recess (53), and the long arm portion (54) can restrict the sliding movement of the front end stopper portion (1041) on the base plate (6) when the seatbelt lock tongue (1) is not inserted into the buckle device.

10. the snapping device of claim 9,

the base (3) and the folded part (31) are integrally formed;

the ejector (5) is made of plastic materials, and the ejection main body (51), the bent part (52), the concave part (53) and the long arm part (54) are integrally formed;

the retainer (7) is integrally formed with the stopper portion (71), the protruding point (72), the protruding portion (73), and a stopper element (74);

the locking plate (8) is made of metal materials, and the locking plate (8) and the trapezoidal boss (82) are integrally formed;

the push button (10) is integrally formed with the guide plate (102), the stopper (103), and the stopper portion (104).

11. a latching device as claimed in claim 1, characterized in that the ejection body (51) comprises a support surface (511) and a projection (512), wherein:

the support surface (511) is used for abutting against the safety belt bolt (1); the supporting surface (511) is arc-shaped or groove-shaped;

the projection (512) is connected with the ejection spring (4).

12. a locker according to any one of claims 1 to 11, further comprising a shockproof block (2), wherein:

the shockproof block (2) is connected to the bottom of the button (10).

13. a seat belt arrangement comprising a seat belt for restraining an occupant, a guiding anchor, a belt retractor, a belt tongue (1) and a buckle arrangement according to any one of claims 1-12.