Safety belt lock catch

Abstract

The invention provides a safety belt lock catch. The safety belt lock catch comprises an ejection block, a magnetic induction piece and a switch base assembly. The magnetic induction piece is arranged in the ejection block, so that the magnetic induction piece can synchronously move along with the ejection block. Therefore, mutual induction between the Hall sensor and the spring bolt is changed into mutual induction between the Hall sensor and the magnetic induction piece, the induction distance between the Hall sensor and the spring bolt is shortened, and the induction stability can be improved. Besides, the switch base assembly is arranged on the edge of the locking body according to the preset position, so that low current can be generated relative to the magnetic induction piece when the ejection block is located at the first position, and high current can be generated relative to the magnetic induction piece when the ejection block is located at the second position, that is, the setting position of the switch base assembly is limited, and the locking effect is improved. And the movement position of the magnetic induction piece along with the ejection block is limited, so that the induction of the Hall sensor and the magnetic induction piece is more accurate, and the accuracy of induction early warning is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile safety technology, and in particular to a seat belt buckle. Background Art

[0002] With the continuous improvement of people's living standards, cars have become one of the indispensable means of transportation for people to travel, and people's requirements for car safety are getting higher and higher. Among them, the seat belt buckle is one of the important components of the car safety system. During the driving process of the car, the seat belt buckle and the seat belt need to be used to restrain the passengers in the seat, which can protect the life safety of the passengers and avoid injuries to the passengers.

[0003] At present, the seat belt buckle is equipped with a Hall sensor, and the Hall sensor can sense the lock tongue, so as to issue a power-off warning to remind the passenger whether the lock tongue is correctly plugged in. However, the Hall sensor and the lock tongue in the existing seat belt buckle are often unstable in sensing due to the inaccurate assembly settings, which affects the accuracy of the sensing warning.

[0004] Therefore, how to improve the sensing stability of the Hall sensor and the lock tongue in the seat belt buckle to improve the accuracy of the sensing warning has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The present application provides a seat belt buckle to solve the problem in the prior art of how to improve the sensing stability of a Hall sensor and a lock tongue in a seat belt buckle to improve the accuracy of sensing warning.

[0006] The present application provides a safety belt buckle, comprising: a housing, a locking body and an unlocking button, wherein the locking body is wrapped and installed in the housing, and the unlocking button is arranged on the locking body along a first direction in which a lock tongue is inserted; the buckle is characterized in that it also comprises: an ejection block, a magnetic induction element and a switch seat assembly;

[0007] The ejection block is movably arranged on the locking body along a first direction in which the locking tongue is inserted, and is located at a first position relative to the locking body when the locking tongue is not inserted, and can be driven to a second position relative to the locking body when the locking tongue is inserted;

[0008] The magnetic induction member is arranged in the ejection block and moves synchronously with the ejection block;

[0009] The switch seat assembly is arranged at the edge of the locking body according to a preset position, so that a low current can be generated relative to the magnetic induction component when the ejection block is located at the first position, and a high current can be generated relative to the magnetic induction component when the ejection block is located at the second position.

[0010] Optionally, the switch seat assembly includes a switch seat, a PCB assembly and a sealing block;

[0011] The switch seat is connected to the first side of the locking body through a connection structure provided thereon, and an accommodating groove is provided at the outer side end of the switch seat;

[0012] The PCB assembly can be installed in the accommodating groove; the PCB assembly can generate a low current relative to the magnetic induction member when the ejection block is located at the first position, and can generate a high current relative to the magnetic induction member when the ejection block is located at the second position;

[0013] The sealing block has an installation shape adapted to the accommodating groove, and seals and installs the PCB assembly in the accommodating groove.

[0014] Optionally, the connection structure includes a positioning column, a first buckle angle, a second buckle angle and a third buckle angle; the switch seat includes an integrally formed connection portion and a support accommodating portion;

[0015] The positioning column is arranged at the inner side end of the switch seat and is located at the connecting portion; the positioning column is inserted into the positioning hole on the first side of the locking body along a second direction perpendicular to the first side of the locking body;

[0016] The first buckle angle is provided at the inner side end of the switch seat and is located at the edge of the connecting portion; the first buckle angle is buckled along the second direction to the edge of the hollow structure at the bottom side of the locking body, and the first buckle angle is used to limit the freedom of the switch seat relative to the first side of the locking body in a third direction; the third direction is opposite to the second direction;

[0017] The second buckle angle is arranged at the inner side end of the switch seat and is located at the edge of the support accommodating portion; the second buckle angle is buckled on the rear edge of the first side of the locking body along the second direction, and the second buckle angle is used to limit the freedom of the switch seat relative to the first side of the locking body in the first direction and to limit the freedom of the switch seat relative to the first side of the locking body in the third direction;

[0018] The third buckle angle is arranged at the inner side end of the switch seat and is located at the edge of the support accommodating portion; the third buckle angle is buckled on the upper edge of the first side of the locking body along the second direction, and the third buckle angle is used to limit the freedom of the switch seat in the third direction relative to the first side of the locking body.

[0019] Optionally, the connection structure further includes a connection hole and a connection column;

[0020] The connecting hole is arranged at the inner side end of the switch seat and is located at the supporting and accommodating portion;

[0021] The connecting column is arranged on a first side of the locking body relative to the connecting hole, and the connecting column is distributed along the second direction;

[0022] The connecting hole and the connecting column are clamped.

[0023] Optionally, the switch seat further comprises a sliding groove, which is arranged at the inner side end of the switch seat and is arranged along the first direction in which the lock tongue is inserted;

[0024] The sliding groove has a through opening and a limiting wall, the ejection block is slidably connected in the sliding groove through the through opening, and the ejection block is limited by the limiting wall; when the ejection block abuts against the limiting wall, the ejection block is located at the second position.

[0025] Optionally, the switch seat further comprises a wire harness clamping buckle, and the wire harness clamping buckle is used to clamp the wire harness in the PCB assembly;

[0026] The wire harness clamping buckle is arranged at the end of the support accommodating portion, and the wire harness clamping buckle can abut against the first side of the locking body in the first direction. The wire harness clamping buckle is also used to limit the freedom of the switch seat relative to the locking body in a fourth direction; the fourth direction is opposite to the first direction.

[0027] Optionally, the containing groove includes a first containing groove and a second containing groove;

[0028] The first accommodating groove has a morphological structure adapted to the PCB assembly, and the PCB assembly is accommodated in the first accommodating groove;

[0029] The second accommodating groove is located above the first accommodating groove along the thickness direction of the switch seat. The second accommodating groove has a morphological structure adapted to the sealing block. The sealing block is accommodated in the second accommodating groove.

[0030] Optionally, the PCB assembly includes a substrate, a Hall sensor, a resistor component and a wiring harness;

[0031] The substrate is installed in the first containing groove;

[0032] The Hall sensor and the resistor component are respectively arranged on the substrate; and the Hall sensor can be used to sense the magnetic sensing element;

[0033] One end of the wiring harness is connected to the resistance component and the Hall sensor, and the other end of the wiring harness is located outside the first accommodating groove through the sealing block.

[0034] Optionally, in a first direction perpendicular to the insertion of the lock tongue, the magnetic induction component is arranged at one of the two opposite ends of the ejection block, and is in the same straight line as the switch seat assembly in the first direction of insertion of the lock tongue.

[0035] Optionally, the magnetic induction component is injection molded in the ejection block.

[0036] Compared with the prior art, this application has the following advantages:

[0037] The present application provides a seat belt buckle, comprising: a shell, a locking body and an unlocking button, wherein the locking body is wrapped and installed in the shell, and the unlocking button is arranged on the locking body along the first direction of insertion of the lock tongue. The seat belt buckle also includes an ejection block, a magnetic sensor and a switch seat assembly. The ejection block is movably arranged on the locking body along the first direction of insertion of the lock tongue, and is located at a first position relative to the locking body when the lock tongue is not inserted, and can be driven to a second position relative to the locking body when the lock tongue is inserted. The magnetic sensor is arranged in the ejection block and moves synchronously with the ejection block. The switch seat assembly is arranged at the edge of the locking body according to a preset position, so that a low current can be generated relative to the magnetic sensor when the ejection block is in the first position, and a high current can be generated relative to the magnetic sensor when the ejection block is in the second position.

[0038] The seat belt buckle provided by the present application is provided with a magnetic induction component in the ejection block, so that the magnetic induction component can move synchronously with the ejection block. The mutual induction between the existing Hall sensor and the lock tongue is changed to the mutual induction between the Hall sensor and the magnetic induction component, and then the induction distance between the Hall sensor and the lock tongue becomes closer, thereby improving the stability of the induction. In addition, the switch seat assembly is arranged at the edge of the locking body according to a preset position, so that when the ejection block is in the first position, a low current can be generated relative to the magnetic induction component, and when the ejection block is in the second position, a high current can be generated relative to the magnetic induction component, that is, by limiting the setting position of the switch seat assembly and limiting the moving position of the magnetic induction component with the ejection block, the induction of the Hall sensor and the magnetic induction component is more accurate, thereby improving the accuracy of the induction warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a seat belt buckle provided in an embodiment of the present application.

[0040] Figure 2 It is a schematic diagram of the structure of the ejector block and switch seat assembly provided in an embodiment of the present application.

[0041] Figure 3 It is an exploded view of the switch base assembly provided in the embodiment of the present application.

[0042] Figure 4It is a schematic diagram of the structure of the ejection block provided in an embodiment of the present application.

[0043] Figure 5 It is a schematic diagram of the structure of the ejection block and the magnetic induction component provided in the embodiment of the present application.

[0044] Figure 6 It is a structural schematic diagram of the switch seat assembly provided in an embodiment of the present application installed on the locking body.

[0045] Figure 7 yes Figure 6 A magnified schematic diagram of center A.

[0046] Figure 8 It is a structural schematic diagram of the switch seat assembly provided in an embodiment of the present application installed at another angle of the locking body.

[0047] Fig. 9 yes Figure 8 A magnified schematic diagram of point B in the middle.

[0048] Fig.10 It is a structural schematic diagram of the switch base provided in an embodiment of the present application.

[0049] Fig.11 It is a structural schematic diagram of a PCB assembly provided in an embodiment of the present application installed in a receiving groove of a switch seat.

[0050] Fig.12 It is a schematic diagram of the structure of the accommodating groove of the sealing block sealing the switch seat provided in the embodiment of the present application.

[0051] Fig.13 It is a structural schematic diagram of the switch base provided in an embodiment of the present application from another angle.

[0052] Fig.14 This is a structural schematic diagram of another switch base provided in an embodiment of the present application.

[0053] Fig.15 This is a structural schematic diagram of another PCB assembly provided in an embodiment of the present application installed in a receiving groove of a switch seat.

[0054] Reference numerals:

[0055] Shell 10, locking body 20, positioning hole 201, unlocking button 30, ejection block 1, magnetic sensing part 2, switch seat assembly 3, switch seat 4, connecting part 41, supporting accommodating part 42, connecting structure 5, positioning column 51, first buckle angle 52, first connecting arm 521, first limiting hook 522, second buckle angle 53, third buckle angle 54, connecting hole 55, sliding groove 43, wire harness clamping buckle 44, accommodating groove 45, first accommodating groove 451, second accommodating groove 452, PCB assembly 6, substrate 60, Hall sensor 61, wire harness 62, sealing block 7. DETAILED DESCRIPTION

[0056] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0057] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] At present, the seat belt buckle is equipped with a Hall sensor, and the Hall sensor can sense the lock tongue, so as to issue a power-off warning to remind the passenger whether the lock tongue is correctly plugged in. However, the Hall sensor and the lock tongue in the existing seat belt buckle are often unstable in sensing due to the inaccurate assembly settings, which affects the accuracy of the sensing warning.

[0060] Based on this, the present application provides a seat belt buckle, including: a shell, a locking body and an unlocking button, the locking body is wrapped and installed in the shell, and the unlocking button is arranged on the locking body along the first direction of insertion of the lock tongue. The seat belt buckle also includes an ejection block, a magnetic sensor and a switch seat assembly. The ejection block is movably arranged on the locking body along the first direction of insertion of the lock tongue, and is located at a first position relative to the locking body when the lock tongue is not inserted, and can be driven to a second position relative to the locking body when the lock tongue is inserted. The magnetic sensor is arranged in the ejection block and moves synchronously with the ejection block. The switch seat assembly is arranged at the edge of the locking body according to a preset position, so that when the ejection block is in the first position, a low current can be generated relative to the magnetic sensor, and when the ejection block is in the second position, the power can be cut off relative to the magnetic sensor to make the current.

[0061] It can be understood that the seat belt buckle provided by the present application, by providing a magnetic induction component in the ejection block, allows the magnetic induction component to move synchronously with the ejection block. The mutual induction between the existing Hall sensor and the lock tongue is changed to the mutual induction between the Hall sensor and the magnetic induction component, and then the induction distance between the Hall sensor and the lock tongue becomes closer, thereby improving the stability of the induction. In addition, the switch seat assembly is arranged at the edge of the locking body according to a preset position, so that when the ejection block is in the first position, a low current can be generated relative to the magnetic induction component, and when the ejection block is in the second position, a high current can be generated relative to the magnetic induction component, that is, by limiting the setting position of the switch seat assembly and limiting the moving position of the magnetic induction component with the ejection block, the induction of the Hall sensor and the magnetic induction component is more accurate, thereby improving the accuracy of the induction warning.

[0062] Next, the seat belt buckle provided by the present application will be described in detail with reference to the accompanying drawings. Figure 1 It is a structural schematic diagram of a seat belt buckle provided in an embodiment of the present application. Figure 2 It is a schematic diagram of the structure of the ejector block and switch seat assembly provided in an embodiment of the present application. Figure 3 It is an exploded view of the switch base assembly provided in the embodiment of the present application. Figure 4 It is a schematic diagram of the structure of the ejection block provided in an embodiment of the present application. Figure 5 It is a schematic diagram of the structure of the ejection block and the magnetic induction component provided in the embodiment of the present application. Figure 6 It is a structural schematic diagram of the switch seat assembly provided in an embodiment of the present application installed on the locking body. Figure 7 yes Figure 6 A magnified schematic diagram of center A. Figure 8 It is a structural schematic diagram of the switch seat assembly provided in an embodiment of the present application installed at another angle of the locking body. Fig. 9 yes Figure 8 A magnified schematic diagram of point B in the middle. Fig.10 It is a structural schematic diagram of the switch base provided in an embodiment of the present application. Fig.11 It is a structural schematic diagram of a PCB assembly provided in an embodiment of the present application installed in a receiving groove of a switch seat. Fig.12 It is a schematic diagram of the structure of the accommodating groove of the sealing block sealing the switch seat provided in the embodiment of the present application. Fig.13 It is a structural schematic diagram of the switch base provided in an embodiment of the present application from another angle. Fig.14 This is a structural schematic diagram of another switch base provided in an embodiment of the present application. Fig.15 This is a structural schematic diagram of another PCB assembly provided in an embodiment of the present application installed in a receiving groove of a switch seat.

[0063] like Figures 1 to 15As shown, the present application provides a seat belt buckle, comprising: a housing 10, a locking body 20 and an unlocking button 30, wherein the locking body 20 is wrapped and installed in the housing 10, and the unlocking button 30 is arranged on the front end of the locking body 20 along the first direction of the lock tongue insertion. The seat belt buckle also includes: an ejection block 1, a magnetic induction element 2 and a switch seat assembly 3. The ejection block 1 is movably arranged on the locking body 20 along the first direction of the lock tongue insertion, and is located at a first position relative to the locking body 20 when the lock tongue is not inserted, and can be driven to a second position relative to the locking body 20 when the lock tongue is inserted. The magnetic induction element 2 is arranged in the ejection block 1 and moves synchronously with the ejection block 1. The switch seat assembly 3 is arranged at the edge of the locking body 20 according to a preset position, so that when the ejection block 1 is in the first position, a low current can be generated relative to the magnetic induction element 2, and when the ejection block 1 is in the second position, a high current can be generated relative to the magnetic induction element 2.

[0064] Specifically, in this embodiment, the switch base assembly 3 includes a switch base 4, a PCB assembly 6 and a sealing block 7. The switch base 4 is connected to the first side of the locking body 20 through a connection structure 5 provided thereon, and the first side of the locking body 20 refers to one side of the U-shaped structure at the rear end of the locking body 20. The front and rear ends of the locking body 20 are the definitions of the structure of the locking body 20 in the first direction of the insertion of the lock tongue. A receiving groove 45 is provided at the outer side end of the switch base 4. The PCB assembly 6 can be installed in the receiving groove 45. The PCB assembly 6 can generate a low current relative to the magnetic induction member 2 when the ejection block 1 is in the first position. In one example, the low current generated relative to the magnetic induction member 2 when the ejection block 1 is in the first position is 5-6.9 mA. And it can generate a high current relative to the magnetic induction member 2 when the ejection block 1 is in the second position. In one example, the high current generated relative to the magnetic induction member 2 when the ejection block 1 is in the second position is 12-17 mA. The sealing block 7 has an installation shape that matches the accommodating groove 45 , and seals and installs the PCB assembly 6 in the accommodating groove 45 .

[0065] Of course, when the system is not powered, no matter the ejector block 1 is located at the first position or the second position, the ejector block 1 generates a high current of 0 mA relative to the magnetic induction element 2 .

[0066] Further, in the present embodiment, the volume of the switch base 4 is set according to the installation space between the housing 10 and the locking body 20. In one example, the switch base 4 includes an integrally formed connection portion 41 and a support and accommodation portion 42, wherein the connection portion 41 and the support and accommodation portion 42 are sequentially connected in the first direction along the insertion of the lock tongue. The connection portion 41 is used to achieve the connection with the ejection block 1, and the support and accommodation portion 42 is mainly used to accommodate the PCB assembly 6. In one example, in the direction parallel to the first side of the locking body 20, the cross-section of the support and accommodation portion 42 is trapezoidal, and the support and accommodation portion 42 is mainly used to accommodate the PCB assembly 6. The cross-section of the connection portion 41 is square. In the second direction along the first side perpendicular to the locking body 20, the connection portion 41 and the support and accommodation portion 42 have a certain thickness, which can accommodate the PCB assembly 6 without affecting the installation of the switch base 4.

[0067] In this embodiment, the connection structure 5 includes a positioning column 51, a first buckle angle 52, a second buckle angle 53 and a third buckle angle 54. The positioning column 51 is arranged at the inner side end of the switch seat 4 and is located at the connection portion 41. The positioning column 51 is inserted into the positioning hole 201 on the first side of the locking body 20 along the second direction perpendicular to the first side of the locking body 20. In one example, the positioning column 51 is set to at least one, and correspondingly, the positioning hole 201 on the first side of the locking body 20 is set to at least one. In one example, the positioning column 51 is preferably set to one, and correspondingly, the positioning hole 201 on the first side of the locking body 20 is preferably set to one.

[0068] The first buckle angle 52 is provided at the inner side end of the switch base 4 and is located at the edge of the connecting portion 41, that is, at the edge of the inner side end of the connecting portion 41. The inner side end of the switch base 4 or the inner side end of the connecting portion 41 is the side end close to the first side of the locking body 20. The first buckle angle 52 is buckled on the edge of the hollow structure on the bottom side of the locking body 20 along the second direction, and the first buckle angle 52 is used to limit the freedom of the switch base 4 relative to the first side of the locking body 20 in the third direction. Among them, the third direction is opposite to the second direction. In one example, the first buckle angle 52 is set to one. The positioning column 51 and the first buckle angle 52 are respectively provided on both sides of the sliding groove 43 (described below). When the positioning column 51 is inserted into the positioning hole 201 on the first side of the locking body 20, the positioning column 51 can limit the freedom of the switch base 4 relative to the first side of the locking body 20 in the first direction, and the first buckle angle 52 limits the freedom of the switch base 4 relative to the first side of the locking body 20 in the third direction. In one example, the first buckle angle 52 includes a first connecting arm 521 and a first limiting hook 522, and the first connecting arm 521 and the first limiting hook 522 are integrally formed. The first connecting arm 521 is arranged at the edge of the inner side end of the connecting portion 41, and the first connecting arm 521 extends along the second direction on the bottom side of the locking body 20. The first limiting hook 522 is connected to the end of the first connecting arm 521, and the first limiting hook 522 is clamped with the edge of the hollow structure on the bottom side of the locking body 20 to connect the switch seat 4 to the first side of the locking body 20 while limiting the freedom of the switch seat 4 relative to the first side of the locking body 20 in the third direction.

[0069] The second buckle angle 53 is provided at the inner side end of the switch base 4 and is located at the edge of the support accommodating portion 42, that is, at the edge of the inner side end of the support accommodating portion 42. The inner side end of the switch base 4 or the inner side end of the support accommodating portion 42 is the side end close to the first side of the locking body 20. The second buckle angle 53 is buckled on the rear edge of the first side of the locking body 20 along the second direction, and the second buckle angle 53 is used to limit the freedom of the switch base 4 relative to the first side of the locking body 20 in the first direction and to limit the freedom of the switch base 4 relative to the first side of the locking body 20 in the third direction. In one example, the second buckle angle 53 is set to one. In one example, the second buckle angle 53 includes a second connecting arm and a second limiting hook, the second connecting arm and the second limiting hook are integrally formed, the second connecting arm is arranged at the edge of the inner side end of the support accommodating portion 42, the second limiting hook is connected to the end of the second connecting arm, and the second connecting arm abuts against the edge of the inner side end of the support accommodating portion 42 to limit the freedom of the switch seat 4 in the first direction relative to the first side of the locking body 20. The second limiting hook is engaged with the edge of the first side of the locking body 20 to limit the freedom of the switch seat 4 in the third direction relative to the first side of the locking body 20, and connect the switch seat 4 to the first side of the locking body 20.

[0070] The third buckle angle 54 is provided at the inner side end of the switch base 4 and is located at the edge of the support accommodating portion 42, that is, at the edge of the inner side end of the support accommodating portion 42. The inner side end of the switch base 4 or the inner side end of the support accommodating portion 42 is the side end close to the first side of the locking body 20. The third buckle angle 54 is buckled on the upper edge of the first side of the locking body 20 along the second direction. In one example, the third buckle angle 54 is provided as one. In one example, the third buckle angle 54 includes a third connecting arm and a third limiting hook, and the third connecting arm and the third limiting hook are integrally formed and arranged. The third connecting arm is provided at the edge of the inner side end of the support accommodating portion 42 and is located on the side of the second connecting arm. The third limiting hook is connected to the end of the third connecting arm, and the third limiting hook is clamped with the edge of the first side of the locking body 20, so as to limit the freedom of the switch base 4 relative to the first side of the locking body 20 in the third direction, and connect the switch base 4 to the first side of the locking body 20.

[0071] In this embodiment, the connection structure 5 further includes a connection hole 55 and a connection column. The connection hole 55 is provided at the inner side end of the switch seat 4 and is located at the support accommodating portion 42, that is, at the edge of the inner side end of the support accommodating portion 42. The hole direction of the connection hole 55 is distributed along the second direction. The connection column is provided on the first side of the locking body 20 relative to the connection hole 55, and the connection column is distributed along the second direction, and the connection hole 55 and the connection column are clamped. The connection hole 55 and the connection column cooperate with the positioning column 51, the first buckle angle 52, the second buckle angle 53 and the third buckle angle 54 to connect the switch seat 4 to the first side of the locking body 20.

[0072] In this embodiment, the accommodating groove 45 includes a first accommodating groove 451 and a second accommodating groove 452, wherein the first accommodating groove 451 has a morphological structure adapted to the PCB assembly 6, and the PCB assembly 6 is accommodated in the first accommodating groove 451. In one example, the first accommodating groove 451 includes a horizontal card slot and an L-shaped card slot, and the horizontal card slot and the L-shaped card slot are connected. Among them, the horizontal card slot is a state structure when the switch seat 4 is installed on the locking body 20 when the safety belt buckle is placed horizontally. The L-shaped card slot includes a first section card slot and a second section card slot that are perpendicular to each other, and the L-shaped card slot is set to two, namely, the first L-shaped card slot and the second L-shaped card slot, and the first L-shaped card slot is located on the outside of the second L-shaped card slot. The second accommodating groove 452 is located above the first accommodating groove 451 along the thickness direction of the switch seat 4, and the second accommodating groove 452 has a morphological structure adapted to the sealing block 7, and the sealing block 7 is accommodated in the second accommodating groove 452. In one example, the second accommodating groove 452 is L-shaped, and the second accommodating groove 452 with L-shaped structure includes a rectangular strip body groove and a square body groove perpendicular to each other. Correspondingly, the sealing block 7 includes a rectangular strip block and a square block perpendicular to each other, the rectangular strip block is embedded in the rectangular strip body groove, and the square block is embedded in the square body groove. In one example, the sealing block 7 can be formed or replaced by encapsulation and injection, and the sealing block 7 can play a role in waterproofing and dustproofing, that is, the wrapped PCB component 6 will not be affected by water and dust.

[0073] In one example, in order to stably connect the sealing block 7, a supporting connection block and a clamping hole set on the sealing block 7 are also provided in the accommodating groove 45. The supporting connection block and the clamping hole are arranged opposite to each other. When the sealing block 7 is buckled in the accommodating groove 45, the supporting connection block and the clamping hole are docked to provide fixed support for the sealing block 7.

[0074] In one example, the sealing block 7 further includes a handle block, which is connected to the outer sides of the rectangular block and the square block, so that the sealing block 7 can be taken out of the second accommodating groove 452 by driving the handle block.

[0075] The PCB assembly 6 can be installed in the receiving groove 45. Specifically, in this embodiment, the PCB assembly 6 includes a substrate 60, a Hall sensor 61, a resistor component and a wiring harness 62. The substrate 60 is installed in the first receiving groove 451, and the Hall sensor 61 and the resistor component are respectively arranged on the substrate 60. The Hall sensor 61 can be used to sense the magnetic sensing element 2. One end of the wiring harness 62 is connected to the resistor component and the Hall sensor 61, and the other end of the wiring harness 62 is located outside the first receiving groove 451 through the sealing block 7.

[0076] Corresponding to the structure of the first receiving groove 451, the substrate 60, the Hall sensor 61 and the resistor components are installed in the horizontal slot of the first receiving groove 451. Two wire harnesses 62 are provided, and each wire harness 62 is correspondingly installed in the first L-shaped slot and the second L-shaped slot. After the PCB assembly 6 is installed, the sealing block 7 is embedded in the second receiving groove 452, so that the PCB assembly 6 is installed in the receiving groove 45.

[0077] In one example, the PCB assembly 6 includes a Hall sensor 61 and a wire harness 62, one end of the wire harness 62 is connected to the Hall sensor 61, and the other end of the wire harness 62 is located outside the first receiving groove 451 through the sealing block 7. The PCB assembly 6 of this structure is simpler in structure, which can save space for its installation in the receiving groove 45, and also saves manufacturing cost and complexity.

[0078] Corresponding to the structure of the above-mentioned PCB assembly 6, the structure installed in the receiving groove 45 is as follows, that is, the receiving groove 45 includes a first receiving groove 451 and a second receiving groove 452, wherein the first receiving groove 451 has a structural form adapted to the Hall sensor 61, and the Hall sensor 61 is received in the first receiving groove 451. The second receiving groove 452 has a morphological structure adapted to the sealing block 7, and the sealing block 7 is received in the second receiving groove 452. Of course, in one example, corresponding to the supporting connection block, the supporting connection block can also limit the movement of the Hall sensor 61 while connecting the supporting sealing block 7, that is, further limit the Hall sensor 61 in the first receiving groove 451.

[0079] In this embodiment, the switch base 4 further includes a harness 62 clamping buckle 44, which is used to clamp the harness 62 in the PCB assembly 6. Specifically, the harness 62 clamping buckle 44 is provided at the end of the support accommodating portion 42, and the harness 62 clamping buckle 44 can abut against the first side of the locking body 20 in the first direction, and the harness 62 clamping buckle 44 is also used to limit the freedom of the switch base 4 relative to the locking body 20 in the fourth direction. The fourth direction is opposite to the first direction.

[0080] In the present embodiment, the switch seat 4 further includes a sliding groove 43, which is arranged at the inner side end of the switch seat 4 and is arranged along the first direction of insertion of the lock tongue. The sliding groove 43 has a through-hole and a limiting wall, the through-hole is located at the front edge of the connecting portion 41, the ejection block 1 is slidably connected in the sliding groove 43 through the through-hole, and the ejection block 1 is limited by the limiting wall. When the ejection block 1 abuts against the limiting wall, the ejection block 1 is located in the second position. Furthermore, in one example, one of the two opposite ends of the ejection block 1 is slidably connected in the sliding groove 43 through the through-hole, and the magnetic sensing component 2 is arranged at one of the two opposite ends of the ejection block 1, so that the magnetic sensing component 2 can sense the Hall sensor 61 of the PCB assembly 6 through the sliding groove 43.

[0081] In this embodiment, the magnetic sensing element 2 is disposed at one of the two opposite ends of the ejection block 1 in a first direction perpendicular to the insertion of the lock tongue, and is in the same straight line as the switch seat assembly 3 in the first direction of insertion of the lock tongue.

[0082] In this embodiment, the magnetic induction member 2 is injection molded in the ejection block 1. In one example, the magnetic induction member 2 includes a magnet.

[0083] The present application provides a seat belt buckle, comprising: a housing 10, a locking body 20 and an unlocking button 30, wherein the locking body 20 is wrapped and installed in the housing 10, and the unlocking button 30 is arranged on the locking body 20 along the first direction of the lock tongue insertion. The seat belt buckle also includes an ejection block 1, a magnetic induction element 2 and a switch seat assembly 3. The ejection block 1 is movably arranged on the locking body 20 along the first direction of the lock tongue insertion, and is located at a first position relative to the locking body 20 when the lock tongue is not inserted, and can be driven to a second position relative to the locking body 20 when the lock tongue is inserted. The magnetic induction element 2 is arranged in the ejection block 1 and moves synchronously with the ejection block 1. The switch seat assembly 3 is arranged at the edge of the locking body 20 according to a preset position, so that when the ejection block 1 is located in the first position, a low current can be generated relative to the magnetic induction element 2, and when the ejection block 1 is located in the second position, a high current can be generated relative to the magnetic induction element 2.

[0084] The seat belt buckle provided by the present application is provided with a magnetic induction member 2 in the ejection block 1, so that the magnetic induction member 2 can move synchronously with the ejection block 1. The mutual induction between the existing Hall sensor 61 and the lock tongue is changed to the mutual induction between the Hall sensor 61 and the magnetic induction member 2, and then the induction distance between the Hall sensor 61 and the lock tongue is shortened, thereby improving the stability of the induction. In addition, the switch seat assembly 3 is arranged at the edge of the locking body 20 according to the preset position, so that when the ejection block 1 is in the first position, a low current can be generated relative to the magnetic induction member 2, and when the ejection block 1 is in the second position, a high current can be generated relative to the magnetic induction member 2, that is, by limiting the setting position of the switch seat assembly 3 and limiting the moving position of the magnetic induction member 2 with the ejection block 1, the induction of the Hall sensor 61 and the magnetic induction member 2 is more accurate, thereby improving the accuracy of the induction warning.

[0085] It should be noted that, although several structures, components or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, according to the specific implementation of the present application, the features and functions of two or more structures, components or units described above can be concretized in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided into multiple components, structures or units to be concretized.

[0086] In addition, although the components and the installation methods of the components or devices in the present application are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed according to the specific components or the installation methods of the components, or that all the components shown must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve corresponding functions, and / or one component can be decomposed into multiple components to achieve corresponding functions, etc.

[0087] Although the present application is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present application. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A seat belt buckle, comprising: A housing, a locking body and an unlocking button, wherein the locking body is wrapped and installed in the housing, and the unlocking button is arranged on the locking body along a first direction of insertion of the lock tongue; characterized in that it also includes: an ejection block, a magnetic induction member and a switch seat assembly; The ejection block is movably arranged on the locking body along a first direction in which the locking tongue is inserted, and is located at a first position relative to the locking body when the locking tongue is not inserted, and can be driven to a second position relative to the locking body when the locking tongue is inserted; The magnetic induction member is arranged in the ejection block and moves synchronously with the ejection block; The switch seat assembly is arranged at the edge of the locking body according to a preset position, so that a low current can be generated relative to the magnetic induction component when the ejection block is located at the first position, and a high current can be generated relative to the magnetic induction component when the ejection block is located at the second position.

2. The seat belt buckle according to claim 1, characterized in that: The switch seat assembly comprises a switch seat, a PCB assembly and a sealing block; The switch seat is connected to the first side of the locking body through a connection structure provided thereon, and an accommodating groove is provided at the outer side end of the switch seat; The PCB assembly can be installed in the accommodating groove; the PCB assembly can generate a low current relative to the magnetic induction member when the ejection block is located at the first position, and can generate a high current relative to the magnetic induction member when the ejection block is located at the second position; The sealing block has an installation shape adapted to the accommodating groove, and seals and installs the PCB assembly in the accommodating groove.

3. The seat belt buckle according to claim 2, characterized in that: The connection structure includes a positioning column, a first buckle angle, a second buckle angle and a third buckle angle; the switch seat includes an integrally formed connection portion and a support and accommodation portion; The positioning column is arranged at the inner side end of the switch seat and is located at the connecting portion; the positioning column is inserted into the positioning hole on the first side of the locking body along a second direction perpendicular to the first side of the locking body; The first buckle angle is provided at the inner side end of the switch seat and is located at the edge of the connecting portion; the first buckle angle is buckled along the second direction to the edge of the hollow structure at the bottom side of the locking body, and the first buckle angle is used to limit the freedom of the switch seat relative to the first side of the locking body in a third direction; the third direction is opposite to the second direction; The second buckle angle is arranged at the inner side end of the switch seat and is located at the edge of the support accommodating portion; the second buckle angle is buckled on the rear edge of the first side of the locking body along the second direction, and the second buckle angle is used to limit the freedom of the switch seat relative to the first side of the locking body in the first direction and to limit the freedom of the switch seat relative to the first side of the locking body in the third direction; The third buckle angle is arranged at the inner side end of the switch seat and is located at the edge of the support accommodating portion; the third buckle angle is buckled on the upper edge of the first side of the locking body along the second direction, and the third buckle angle is used to limit the freedom of the switch seat in the third direction relative to the first side of the locking body.

4. The seat belt buckle according to claim 3, characterized in that: The connection structure also includes a connection hole and a connection column; The connecting hole is arranged at the inner side end of the switch seat and is located at the supporting and accommodating portion; The connecting column is arranged on a first side of the locking body relative to the connecting hole, and the connecting column is distributed along the second direction; The connecting hole and the connecting column are clamped.

5. The seat belt buckle according to claim 2, characterized in that: The switch seat further comprises a sliding groove, which is arranged at the inner side end of the switch seat and is arranged along the first direction in which the lock tongue is inserted; The sliding groove has a through opening and a limiting wall, the ejection block is slidably connected in the sliding groove through the through opening, and the ejection block is limited by the limiting wall; when the ejection block abuts against the limiting wall, the ejection block is located at the second position.

6. The seat belt buckle according to claim 2, characterized in that: The switch seat also includes a wire harness clamping buckle, and the wire harness clamping buckle is used to clamp the wire harness in the PCB assembly; The wire harness clamping buckle is arranged at the end of the support accommodating portion, and the wire harness clamping buckle can abut against the first side of the locking body in the first direction. The wire harness clamping buckle is also used to limit the freedom of the switch seat relative to the locking body in a fourth direction; the fourth direction is opposite to the first direction.

7. The seat belt buckle according to claim 2, characterized in that: The containing groove comprises a first containing groove and a second containing groove; The first accommodating groove has a morphological structure adapted to the PCB assembly, and the PCB assembly is accommodated in the first accommodating groove; The second accommodating groove is located above the first accommodating groove along the thickness direction of the switch seat. The second accommodating groove has a morphological structure adapted to the sealing block. The sealing block is accommodated in the second accommodating groove.

8. The seat belt buckle according to claim 7, characterized in that: The PCB assembly includes a substrate, a Hall sensor, a resistor component and a wiring harness; The substrate is installed in the first containing groove; The Hall sensor and the resistor component are respectively arranged on the substrate; and the Hall sensor can be used to sense the magnetic sensing element; One end of the wiring harness is connected to the resistance component and the Hall sensor, and the other end of the wiring harness is located outside the first accommodating groove through the sealing block.

9. The seat belt buckle according to claim 1, characterized in that: In a first direction perpendicular to the insertion of the lock tongue, the magnetic induction component is arranged at one of the two opposite ends of the ejection block and is in the same straight line as the switch seat assembly in the first direction of insertion of the lock tongue.

10. The seat belt buckle according to claim 1, characterized in that: The magnetic induction component is injection molded in the ejection block.

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