CN218966879U - Switch seat for safety belt lock catch and safety belt lock catch - Google Patents

Abstract

A switch seat for a safety belt lock catch comprises a base body, a cover plate and a pair of elastic sheets, wherein the elastic sheets are connected with a circuit, and the lock tongues are in contact with each other when not inserted, so that the circuit is connected; when the lock tongue is inserted into the lock catch, the ejection block of the safety belt lock catch body is driven to be inserted between the elastic sheets, so that the ejection block and the elastic sheets are separated, and a circuit is cut off; the spring plate is in different states before and after the spring bolt is inserted, so that the sensing of the state of inserting the spring bolt is obtained; a clamping groove structure is arranged on the base body to provide an installation position for the elastic sheet; the base body and the cover plate are provided with mutually-spliced splicing structures, and at least one of the splicing structures is made of elastic materials; the plugging structure at least comprises a main plugging column which is formed by polymerizing a plurality of cylinders and has a round external overall profile and is arranged on one side of the cover plate, wherein the main plugging column has a size which gradually increases from the top to the root or has a guiding angle at the top end; one side of the base body is provided with a main groove matched with the main plug-in column; the main inserting column and the main groove are in the size, so that interference fit is formed after the main inserting column and the main groove are inserted.

Description

Switch seat for safety belt lock catch and safety belt lock catch

Technical Field

The application relates to the field of safety belts, in particular to a switch seat for a safety belt lock catch and the safety belt lock catch.

Background

With the continuous rapid development of the automobile industry, automobiles become one of the indispensable transportation tools for people to travel, so that people pay more and more attention to traffic safety, and the safety system of the automobiles becomes one of the very important factors when people choose to purchase automobiles.

At present, various automobile manufacturers put more effort on the safety of automobiles, and the riding safety of passengers and drivers is ensured through various safety facilities. The safety belt is an important ring for guaranteeing passengers and drivers, in order to ensure that the passengers and the drivers can tie the safety belt according to regulations in the running process of the automobile, an automobile manufacturer is provided with a safety belt alarm system in the automobile, and when the passengers and the drivers do not tie the safety belt in the running process of the automobile, the safety belt alarm system can give an alarm for warning the passengers and the drivers that the passengers and the drivers need to tie the safety belt in time, so that the utilization rate of the safety belt is greatly improved, and the safety of the passengers and the drivers is guaranteed.

However, in the existing safety belt alarm system, a micro switch is mostly arranged in a safety belt lock catch and is used for sensing whether a lock tongue of an automobile safety belt is inserted into the safety belt lock catch, and although the micro switch is adopted, the sensing function of the lock tongue of the safety belt can be realized, the structure is complex, the cost is high, and the production and the assembly processes are complex.

Disclosure of Invention

The application provides a switch seat for safety belt lock catch to solve micro-gap switch structure complicacy, the higher problem of cost in the current safety belt lock catch. The present application additionally provides a seat belt buckle comprising the above-described switch seat for a seat belt buckle.

The embodiment of the application provides a switch seat for a safety belt lock catch, which comprises a base body, a cover plate and a pair of elastic pieces, wherein the elastic pieces are connected with a circuit and mutually contact when a safety belt lock tongue is not inserted, so that the circuit is connected; when the safety belt lock tongue is inserted into the lock catch, the ejection block of the safety belt lock catch body can be driven to be inserted between the pair of elastic pieces, so that the ejection block and the elastic pieces are separated from each other, and a circuit is cut off; the sensing of the state of the inserted safety belt lock tongue can be obtained through different states of the elastic sheet before and after the safety belt lock tongue is inserted;

the base body provides an installation position for the elastic sheet through a clamping groove structure arranged on the base body;

the base body and the cover plate are respectively provided with an inserting structure for mutual insertion between the base body and the cover plate, and at least one of the base body and the cover plate adopts elastic materials at least at the inserting structure position;

the plugging structure at least comprises at least one main plugging column which is formed by the aggregation of a plurality of cylinders and is circular in external overall outline, is arranged on one side of the cover plate, and has a size which gradually increases from the top to the root or has a guide angle at the top end; a main groove matched with the main plug-in column is formed in one side of the base body; the main plug-in column and the main groove are sized so that an interference fit can be formed after the main plug-in column and the main groove are plugged in.

Optionally, the cover plate further comprises a plurality of cylindrical fixing columns on one side, wherein the cylindrical fixing columns are arranged on the surface of the cover plate in a scattering way, and the cylindrical fixing columns have gradually increasing sizes from the top to the root or have guide angles at the top end; one side of the matrix comprises a plurality of auxiliary grooves which are arranged corresponding to the cylindrical fixing columns and can be in interference fit.

Optionally, the elastic sheet is embedded in a mounting position provided for the elastic sheet by a clamping groove on the base body; the head of the elastic piece is provided with an arc which is bent towards the other elastic piece, the elastic piece extends to the tail part for a certain distance, then the elastic piece is transited to the tail part of the elastic piece through the bending part, and after the elastic piece is bent, the plane of the tail part of the elastic piece is mutually perpendicular to the plane of the head part of the elastic piece.

Optionally, the cover plate further comprises a baffle; the baffle extends from the tail end of the cover plate to one side of the plug-in structure of the cover plate, and the baffle is used for fixing the bending part of the elastic sheet on the step surface of the base body.

Optionally, the cover plate further includes at least one first rib, where the first rib is used to compress the elastic sheet in the clamping groove of the base body.

Optionally, the base member is provided with joint portion by the one end of shell fragment afterbody, joint portion one end with base member fixed connection, the other end with the base member is connected with the buckle mode, can be with the connection the wire of shell fragment is fixed in through joint portion the base member.

Optionally, the one end of leaning on the shell fragment head of base member is provided with the open slot in both sides, when ejecting piece inserts between a pair of shell fragment, the open slot can provide the space that the shell fragment head dodged to both sides.

Optionally, the base member both sides are provided with can be with the base member is fixed the knot angle on the hasp body.

The embodiment of the application provides a safety belt lock catch, which comprises the switch seat for the safety belt lock catch; the lock catch is provided with a slidable ejection block and a spring, and the ejection block is supported by an insulating material; the spring ejects the ejecting block towards the opening direction of the lock catch, when the safety belt lock tongue is inserted, the safety belt lock tongue abuts against the ejecting block to enable the safety belt lock tongue to move towards the direction far away from the opening of the lock catch, and in the moving process, the ejecting block can be inserted into the middle position where the pair of elastic sheets are in contact with each other, so that the two elastic sheets are separated, and whether the safety belt lock tongue is inserted or not is detected.

Compared with the prior art, the application has the following advantages:

the embodiment of the application provides a switch seat for a safety belt lock catch, which comprises a base body, a cover plate and a pair of elastic pieces, wherein the elastic pieces are connected with a circuit and mutually contact when a safety belt lock tongue is not inserted, so that the circuit is connected; when the safety belt lock tongue is inserted into the lock catch, the ejection block of the safety belt lock catch body can be driven to be inserted between the pair of elastic pieces, so that the ejection block and the elastic pieces are separated from each other, and a circuit is cut off; the sensing of the state of the inserted safety belt lock tongue can be obtained through different states of the elastic sheet before and after the safety belt lock tongue is inserted; the base body provides an installation position for the elastic sheet through a clamping groove structure arranged on the base body; the base body and the cover plate are respectively provided with an inserting structure for mutual insertion between the base body and the cover plate, and at least one of the base body and the cover plate adopts elastic materials at least at the inserting structure position; the plugging structure at least comprises at least one main plugging column which is formed by the aggregation of a plurality of cylinders and is circular in external overall outline, is arranged on one side of the cover plate, and has a size which gradually increases from the top to the root or has a guide angle at the top end; a main groove matched with the main plug-in column is formed in one side of the base body; the size of main spliced pole with main recess makes both peg graft the back, can form interference fit, and this application can sense whether the safety belt is tied up in real time, and this a switch seat for safety belt hasp simple structure, safe and reliable, convenient assembling, low cost.

According to the embodiment of the application, when the safety belt lock tongue is inserted into the lock catch, the ejection block can be driven to be inserted between the pair of elastic pieces, so that the pair of elastic pieces are separated from each other, and a circuit is cut off; that is, the detection device is simple in structure, convenient to assemble and low in cost, and can detect whether the safety belt is tied or not by sensing the insertion state of the safety belt lock tongue through the different states of the pair of elastic sheets before and after the safety belt lock tongue is inserted into the lock catch.

Drawings

Fig. 1 is a schematic structural view of a switch seat for a seat belt buckle according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a pair of elastic sheets according to an embodiment of the present application;

FIG. 3 is a schematic view of a pair of elastic pieces mounted on a base according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a cover plate according to an embodiment of the present application;

FIG. 5 is a schematic structural view of a substrate provided in an embodiment of the present application;

FIG. 6 is a schematic view of a structure of a base, a pair of elastic pieces, and a cover plate according to an embodiment of the present disclosure;

fig. 7 is a schematic structural view of a switch seat for a seat belt buckle according to an embodiment of the present application mounted on a buckle body (a seat belt tongue is not inserted into a buckle);

fig. 8 is a schematic structural view of a switch seat for a seat belt buckle according to an embodiment of the present application mounted on a buckle body (a seat belt tongue is inserted into a buckle);

fig. 9 is a schematic structural view of a switch seat for a seat belt buckle provided in an embodiment of the present application mounted on a side of a buckle body;

fig. 10 is a schematic structural view of a switch seat for a seat belt buckle according to an embodiment of the present application mounted on a buckle body.

Reference numerals:

100: a cover plate;

1001: a main plug-in column; 1002: a cylindrical fixing column; 1003: a first rib; 1004: a baffle;

200: a spring plate; 2001: a first elastic sheet; 2002: a second spring plate; 200-A, contact point;

2001-1: the head of the first elastic sheet; 2001-2: the tail part of the first elastic sheet;

2002-1: the head of the second elastic sheet; 2002-2: the tail end of the second elastic sheet;

300: a substrate:

3001: a main groove; 3002: a sub groove; 3003: a clamping groove; 3004: an open slot;

3005: a clamping part; 3006-1: a first buckling angle; 3006-2: a second buckling angle; 3007: a step surface;

400: a seat belt tongue;

500: an ejection block;

600: a lock catch body.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other ways than those herein described and similar generalizations can be made by those skilled in the art without departing from the spirit of the application and the application is therefore not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the related art, the safety belt alarm system is provided with a micro switch in a safety belt lock catch, and the micro switch can sense whether a safety belt lock tongue is inserted into the lock catch or not, but the structure of the micro switch is complex, the safety is low, the assembly difficulty is high, and the cost is high. In view of the above, the present application provides a switch seat for a seat belt buckle, including a base body, a cover plate, and a pair of elastic pieces, the elastic pieces connecting a circuit and contacting each other when a seat belt tongue is not inserted, thereby completing the circuit; when the safety belt lock tongue is inserted into the lock catch, the ejection block of the safety belt lock catch body can be driven to be inserted between the pair of elastic pieces, so that the ejection block and the elastic pieces are separated from each other, and a circuit is cut off; the sensing of the state of the inserted safety belt lock tongue can be obtained through different states of the elastic sheet before and after the safety belt lock tongue is inserted; the base body provides an installation position for the elastic sheet through a clamping groove structure arranged on the base body; the base body and the cover plate are respectively provided with an inserting structure for mutual insertion between the base body and the cover plate, and at least one of the base body and the cover plate adopts elastic materials at least at the inserting structure position; the plugging structure at least comprises at least one main plugging column which is formed by the aggregation of a plurality of cylinders and is circular in external overall outline, is arranged on one side of the cover plate, and has a size which gradually increases from the top to the root or has a guide angle at the top end; a main groove matched with the main plug-in column is formed in one side of the base body; the size of main spliced pole with main recess makes both peg graft the back, can form interference fit, and this application can sense whether the safety belt is tied up in real time, and this a switch seat for safety belt hasp simple structure, safe and reliable, convenient assembling, low cost.

In other words, when the safety belt lock tongue is inserted into the lock catch, the ejection block can be driven to be inserted between the pair of elastic pieces, so that the pair of elastic pieces are separated from each other, and the circuit is cut off; that is, the detection device is simple in structure, convenient to assemble and low in cost, and can detect whether the safety belt is tied or not by sensing the insertion state of the safety belt lock tongue through the different states of the pair of elastic sheets before and after the safety belt lock tongue is inserted into the lock catch.

Those skilled in the art will appreciate that the following implementations are merely illustrative and not an exhaustive list, and that a person skilled in the art may substitute, splice or combine certain features or certain examples based on these implementations, which are still considered as the disclosure of the present application.

Fig. 1 is a schematic structural diagram of a seat belt lock switch seat according to an embodiment of the present application, where the seat belt lock switch seat includes a base 300, a cover 100, and a pair of elastic pieces 200.

As shown in fig. 2, a schematic structural diagram of a pair of elastic pieces 200 is shown, the pair of elastic pieces 200 are a first elastic piece 2001 and a second elastic piece 2002, the structures of the first elastic piece 2001 and the second elastic piece 2002 are identical, the elastic pieces 200 are made of conductive metal materials, and as shown in fig. 3, the first elastic piece 2001 and the second elastic piece 2002 are inserted into a mounting position provided for the clamping groove 3003 on the base 300.

As shown in fig. 2, the head 2001-1 of the first elastic piece and the head 2002-1 of the second elastic piece are disposed opposite to each other, and each of the two elastic pieces is provided with an arc bending toward the opposite elastic piece, wherein the bending arc is required to make the first elastic piece 2001 and the second elastic piece 2002 generate a contact point 200-a, so that the specific arc bending of the elastic pieces can be selected according to practical situations.

After the first spring plate 2001 and the second spring plate 2002 extend to the respective tail portions by a certain distance, the first spring plate 2001 and the second spring plate 2002 transition to the respective tail portions through bending portions, and after the bending portions, the planes of the tail portions 2001-2 of the first spring plate and the tail portions 2002-2 of the second spring plate are perpendicular to the planes of the front portions of the spring plates. Specifically, as shown in fig. 2, the planes of the head 2001-1 of the first elastic piece and the head 2002-1 of the second elastic piece are vertically arranged, and extend to the tail of each of the two elastic pieces for a certain distance to reach the tail 2001-2 of the first elastic piece and the tail 2002-2 of the second elastic piece, and the planes of the tail 2001-2 of the first elastic piece and the tail 2002-2 of the second elastic piece are horizontally arranged, that is, the planes of the head 2001-1 of the first elastic piece and the head 2002-1 of the second elastic piece and the planes of the tail of the two elastic pieces are mutually perpendicular.

Specifically, the tail 2001-2 of the first elastic piece and the tail 2002-2 of the second elastic piece are respectively connected with two poles of a circuit, and when the seat belt lock tongue 400 is not inserted into the lock catch body 600, the contact point 200-a of the first elastic piece 2001 and the second elastic piece 2002 is in a contact state, so that the first elastic piece 2001 and the second elastic piece 2002 are in a circuit connection, namely a closed power-on loop is formed through the contact between the first elastic piece 2001 and the second elastic piece 2002; when the seat belt latch 400 is inserted into the latch body 600, the ejector block 500 of the seat belt latch body can be driven to be inserted between the pair of elastic pieces 200, so that the contact points 200-a of the first elastic piece 2001 and the second elastic piece 2002 are separated from each other, and the circuit is cut off; the state of the inserted state of the seat belt latch 400 can be perceived by the different states of the spring plate 200 before and after the insertion of the seat belt latch 400.

That is, after the tail 2001-2 of the first elastic piece and the tail 2002-2 of the second elastic piece are electrically connected, as shown in fig. 7, when the seat belt lock tongue 400 is not inserted into the lock catch body 600, a contact point 200-a is generated between the bent portion of the first elastic piece 2001 and the bent portion of the second elastic piece 2002, two poles of the circuit connected from the tail 2001-2 of the first elastic piece and the tail 2002-2 of the second elastic piece are communicated, at this time, the circuit of the seat belt lock catch switch is conducted, and the circuit of the seat belt lock catch switch is connected with the seat belt alarm circuit, which is not described in detail in the prior art.

After the circuit of the seat belt lock switch seat is communicated with the seat belt alarm circuit, when the seat belt lock tongue 400 is not inserted into the lock catch body 600, the first elastic sheet 2001 and the second elastic sheet 2002 are in a mutually contacted state, at this time, the circuit of the seat belt lock switch seat is in a conducting state, and then signals are sent to an ECU system of an automobile, alarm driving of the ECU system, which is not fastened with a seat belt, is triggered, and the ECU system controls to send an alarm; of course, the on state of the circuit of the seat belt lock switch seat can be directly connected with a specially arranged seat belt alarm circuit so as to send out an alarm of unbelted seat belt.

When the automobile gives an alarm, reminding the passenger to attach a safety belt; as shown in fig. 8, when the belt lock tongue 400 is inserted into the buckle body 600, the belt lock tongue 400 drives the ejector block 500 to slide between the pair of elastic pieces 200, i.e. the first elastic piece 2001 and the second elastic piece 2002 are separated from each other, and at this time, the circuit is cut off, and an alarm is not given, i.e. the occupant is already wearing the belt; the essence of the method is that the first spring plate 2001 and the second spring plate 2002 can obtain the perception of the insertion state of the seat belt lock tongue 400 in different states before and after the seat belt lock tongue 400 is inserted into the lock catch body 600, so as to timely detect whether the occupant wears the seat belt.

Meanwhile, the ejector block 500 on the safety belt lock catch body is made of an insulating material, and the insulating material of the ejector block 500 can be selected according to the actual situation in the working process.

As shown in fig. 3, the first spring 2001 and the second spring 2002 are inserted into a slot 3003 on the base 300, the slot 3003 may extend from a front end to a rear end of the base 300, and a structure of the slot 3003 may be determined by a structure of the first spring 2001 and the second spring 2002, so that a circuit of the slot 3003 is curved.

Meanwhile, the base 300 and the cover 100 are provided with a plugging structure for plugging with each other, and at least one of them is made of an elastic material at least at the plugging structure.

As shown in fig. 4 and 5, the plugging structure at least comprises at least one main plugging column 1001 formed by a plurality of cylinders in a polymerized manner and having a circular outer overall contour, which is arranged on one side of the cover plate 100, wherein the main plugging column 1001 has a size gradually increasing from the top to the root or has a guiding angle at the top; a main groove 3001 matched with the main plug-in column 1001 is arranged on one side of the base 300; the primary socket 1001 and the primary recess 3001 are sized to form an interference fit after being plugged together.

Further, the cover plate 100 further includes a plurality of cylindrical fixing columns 1002 on one side thereof, wherein the cylindrical fixing columns 1002 are disposed at the surface of the cover plate 100 in a scattered manner, and the cylindrical fixing columns 1002 have a size gradually increasing from the top to the root or have a guide angle at the top; the base 300 includes a plurality of sub-grooves 3002 on one side, which are disposed corresponding to the cylindrical fixing posts 1002 and can be interference-fitted.

That is, the base 300 and the cover 100 are provided with mutually inserted insertion structures on one side, specifically, the cover 100 is provided with a main insertion column 1001 and a cylindrical fixing column 1002, in this embodiment, one main insertion column 1001 and five cylindrical fixing columns 1002 are provided, and the main insertion column 1001 is formed by polymerizing a plurality of cylinders, the outer overall profile of the main insertion column 1001 is circular, and the main insertion column 1001 and the cylindrical fixing column 1002 have gradually increasing sizes from top to root, or have guiding angles on top, so as to perform interference fit with a main groove 3001 and a sub groove 3002 corresponding to the base 300, as shown in fig. 6, so as to ensure that the base 300 and the cover 100 can be tightly coupled.

As shown in fig. 8, when the seat belt latch 400 is inserted into the latch body 600, the ejector block 500 is driven to be inserted between the pair of elastic pieces 200, so that the first elastic piece 2001 and the second elastic piece 2002 are separated from each other, that is, the first elastic piece 2001 and the second elastic piece 2002 move to the left and right sides, and in order to prevent the first elastic piece 2001 and the second elastic piece 2002 from moving to the left and right, upward movement is generated at the same time, so as to break the tight connection between the base 300 and the cover 100, for this reason, at least one first rib 1003 is provided on the cover 100, and as shown in fig. 4, the first rib 1003 is used to compress the elastic piece 200 in the clamping groove 3003 of the base 300.

That is, the first ribs 1003 on the cover plate 100 may ensure that the first spring plate 2001 and the second spring plate 2002 do not move upward while moving left and right, in this embodiment, as shown in fig. 4, the first ribs 1003 are disposed in a rectangular-like area at the front end of the cover plate 100, the shape of the first ribs 1003 is a sheet structure, and the number of the first ribs 1003 is three, and the first ribs 1003 may be other structures, so long as the specific structure and the number of the first ribs 1003 are not limited, and the first spring plate 2001 and the second spring plate 2002 can be fixed in the clamping groove 3003.

As shown in fig. 4, the cover plate 100 further includes a baffle 1004; the baffle 1004 extends from the tail end of the cover plate 100 to the plugging structure side thereof, and the baffle 1004 is used for fixing the bending portion of the elastic sheet 200 on the step surface 3007 of the base 300.

That is, as shown in fig. 3, when the first elastic piece 2001 and the second elastic piece 2002 are inserted into the clamping groove 3003 of the base 300, the bent portion of the tail 2001-2 of the first elastic piece and the bent portion of the tail 2002-2 of the second elastic piece are clamped on the step surface 3007 of the base 300, as shown in fig. 6, the baffle 1004 on the cover 100 further fixes the bent portion of the tail 2001-2 of the first elastic piece and the bent portion of the tail 2002-2 of the second elastic piece on the step surface 3007 of the base 300, so as to prevent the wire connected to the tail 2001-2 of the first elastic piece and the wire connected to the tail 2002-2 of the second elastic piece from deforming and breaking during the pulling process.

In addition, as shown in fig. 5, the base 300 has a clamping portion 3005 at one end thereof near the first spring tail 2001-2 and the second spring tail 2002-2, one end of the clamping portion 3005 is fixedly connected to the base 300, and the other end is connected to the base 300 in a snap-fit manner, and the wire connected to the spring 200 can be fixed to the base 300 by the clamping portion 3005.

The clamping portion 3005 on the base 300 is used for fixing the wire connected to the first elastic piece 2001 and the second elastic piece 2002 at the position of the end of the base 300, so as to determine that the wire connected to the first elastic piece 2001 and the second elastic piece 2002 is fixed in the process of moving left and right.

Meanwhile, the base 300 has two open grooves 3004 at two sides at one end thereof near the first spring head 2001-1 and the second spring head 2002-1, and when the ejector block 500 is inserted between the pair of springs 200, the first spring 2001 and the second spring 2002 move to the left and right sides of the base 300, and at this time, the open grooves 3004 can provide a space for the first spring head 2001-1 and the second spring head 2002-1 to escape to the two sides.

As shown in fig. 5, at one end of the base 300 near the first spring plate head 2001-1 and the second spring plate head 2002-1, two sides are provided with open slots 3004, when the seat belt lock tongue 400 is inserted into the lock catch body 600, as shown in fig. 8, the seat belt lock tongue 400 drives the ejector block 500 to slide downward, the ejector block 500 separates the first spring plate head 2001-1 from the second spring plate head 2002-1, at this time, the first spring plate head 2001-1 and the second spring plate head 2002-1 move towards the left and right ends, so that the first spring plate head 2001-1 and the second spring plate head 2002-1 enter into the open slots 3004, i.e. the open slots 3004 accommodate the first spring plate head 2001-1 and the second spring plate head 2002-1, and at the same time, do not affect normal operation of the first spring plate 2001-1 and the second spring plate head 2002-1.

Both sides of the base 300 are provided with fastening corners capable of fixing the base 300 to the latch body 600.

As shown in fig. 9 and 10, the base 300 is fixed at a lateral position of the latch body 600, that is, fixed at a lateral side of the latch body 600 by a latch angle on the base 300. Specifically, a first fastening angle 3006-1 extends from the front end of the base 300, the first fastening angle 3006-1 is perpendicular to the horizontal plane of the base 300, and the fastening angle 3006-1 is fastened to the bottom surface of the latch body 600; meanwhile, a second fastening angle 3006-2 is also extended from the other side of the rear end of the base 300, the first fastening angle 3006-1 and the second fastening angle 3006-2 are located at two sides of the base 300, the first fastening angle 3006-1 is disposed at the front end of the base 300, and the second fastening angle 3006-2 is disposed at the rear end of the base 300, that is, the base is fixed at the side of the latch body 600 by the first fastening angle 3006-1 and the second fastening angle 3006-2, so as to prevent the base 300 from falling off.

The different states of the spring plate 200 when the seat belt latch 400 is not inserted into the buckle and the latch is inserted into the buckle will be described in detail below.

As shown in fig. 7, when the base 300 is mounted at the side position of the latch body 600, the ejector 500 does not slide when the seat belt latch 400 is not inserted into the latch, and at this time, the bent portions of the heads of the pair of elastic pieces 200 contact each other, that is, the contact power 200-a of the first elastic piece 2001 and the second elastic piece 2002 is conducted, the latch belt switch and the car alarm circuit form a closed loop, and the alarm circuit is in an energized alarm state, prompting the occupant to tie the seat belt; as shown in fig. 8, when the seat belt latch 400 is inserted into the latch body 600, the seat belt latch 400 drives the ejector block 500 to slide downward, that is, the ejector block 500 moves to the middle position of the pair of elastic pieces 200, and the latch is locked, at this time, the first elastic piece 2001 and the second elastic piece 2002 are separated by the ejector block 500, that is, the contact point 200-a of the pair of elastic pieces is in a disconnected state, and at this time, the alarm circuit is disconnected and an alarm prompt is not sent. The elastic sheet 200 is in different states before and after the safety belt lock tongue 400 is inserted, so that the safety belt lock tongue 400 is perceived in the inserted state, whether a safety belt is tied or not can be sensed in real time, and the safety belt lock tongue is simple in structure, safe, reliable, convenient to assemble and low in cost.

Another embodiment of the present application is a seat belt latch, including the switch seat for a seat belt latch described above; the lock catch is provided with a slidable ejection block and a spring, and the ejection block is supported by an insulating material; the spring ejects the ejection block towards the opening direction of the lock catch, when the lock tongue is inserted, the lock tongue abuts against the ejection block, so that the lock tongue moves towards the direction far away from the opening of the lock catch, and in the moving process, the ejection block can be inserted into the middle position where the pair of elastic sheets are contacted with each other, so that the two elastic sheets are separated, and the detection on whether the lock tongue is inserted or not is realized.

While the preferred embodiment has been described, it is not intended to limit the utility model thereto, and any person skilled in the art may make variations and modifications without departing from the spirit and scope of the present utility model, so that the scope of the present utility model shall be defined by the claims of the present application.

Claims (9)

1. A switch seat for a seat belt buckle, comprising: the safety belt lock comprises a base body, a cover plate and a pair of elastic pieces, wherein the elastic pieces are connected with a circuit and mutually contact when the safety belt lock tongue is not inserted, so that the circuit is connected; when the safety belt lock tongue is inserted into the lock catch, the ejection block of the safety belt lock catch body can be driven to be inserted between the pair of elastic pieces, so that the ejection block and the elastic pieces are separated from each other, and a circuit is cut off; the sensing of the state of the inserted safety belt lock tongue can be obtained through different states of the elastic sheet before and after the safety belt lock tongue is inserted;

the base body provides an installation position for the elastic sheet through a clamping groove structure arranged on the base body;

the base body and the cover plate are respectively provided with an inserting structure for mutual insertion between the base body and the cover plate, and at least one of the base body and the cover plate adopts elastic materials at least at the inserting structure position;

the plugging structure at least comprises at least one main plugging column which is formed by the aggregation of a plurality of cylinders and is circular in external overall outline, is arranged on one side of the cover plate, and has a size which gradually increases from the top to the root or has a guide angle at the top end; a main groove matched with the main plug-in column is formed in one side of the base body; the main plug-in column and the main groove are sized so that an interference fit can be formed after the main plug-in column and the main groove are plugged in.

2. The switch block for a seat belt buckle according to claim 1, further comprising a plurality of cylindrical fixing columns on one side of the cover plate, wherein the cylindrical fixing columns are provided on the cover plate surface in a scattered manner, the cylindrical fixing columns have a size gradually increasing from a top to a root, or have a guide angle at a top end; one side of the matrix comprises a plurality of auxiliary grooves which are arranged corresponding to the cylindrical fixing columns and can be in interference fit.

3. The switch block for a seat belt buckle of claim 1, wherein the spring plate is inserted into a mounting position provided for the base body by a clamping groove; the head of the elastic piece is provided with an arc which is bent towards the other elastic piece, the elastic piece extends to the tail part for a certain distance, then the elastic piece is transited to the tail part of the elastic piece through the bending part, and after the elastic piece is bent, the plane of the tail part of the elastic piece is mutually perpendicular to the plane of the head part of the elastic piece.

4. A switch housing for a seat belt buckle as in claim 3 wherein said cover plate further comprises a baffle; the baffle extends from the tail end of the cover plate to one side of the plug-in structure of the cover plate, and the baffle is used for fixing the bending part of the elastic sheet on the step surface of the base body.

5. The switch housing for a seat belt buckle of claim 4, wherein the cover plate further comprises at least one first rib for compressing the spring plate in the slot of the base body.

6. The switch seat for a safety belt buckle according to claim 2, wherein one end of the base body close to the tail of the elastic sheet is provided with a clamping portion, one end of the clamping portion is fixedly connected with the base body, the other end of the clamping portion is connected with the base body in a buckling manner, and a wire connected with the elastic sheet can be fixed on the base body through the clamping portion.

7. The switch seat for a seat belt buckle according to claim 5, wherein the base body has an opening groove formed at one end thereof close to the head of the elastic piece on both sides, and the opening groove is capable of providing a space for the head of the elastic piece to escape to both sides when the ejector block is inserted between the pair of elastic pieces.

8. The switch housing for a seat belt buckle of claim 1, wherein both sides of the base body are provided with buckle angles capable of fixing the base body to the buckle body.

9. A seat belt buckle comprising a buckle body and a switch seat for a seat belt buckle as claimed in any one of claims 1 to 8; the lock catch is provided with a slidable ejection block and a spring, and the ejection block is supported by an insulating material; the spring ejects the ejecting block towards the opening direction of the lock catch, when the safety belt lock tongue is inserted, the safety belt lock tongue abuts against the ejecting block to enable the safety belt lock tongue to move towards the direction far away from the opening of the lock catch, and in the moving process, the ejecting block can be inserted into the middle position where the pair of elastic sheets are in contact with each other, so that the two elastic sheets are separated, and whether the safety belt lock tongue is inserted or not is detected.

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