Plugging and unlocking mechanism of safety belt

Abstract

The invention discloses a plugging and unlocking mechanism of a safety belt. The plugging and unlocking mechanism comprises a first guide rail; the spring bolt inserting and pulling mechanism is installed on the first guide rail in a sliding mode, a spring bolt can be assembled on the spring bolt inserting and pulling mechanism, and the spring bolt is inserted into the lock head and popped out of the lock head through sliding of the spring bolt inserting and pulling mechanism; the inserting and pulling mechanism driver comprises a first driving block, the inserting and pulling mechanism driver is used for driving the spring bolt inserting and pulling mechanism to slide back and forth on the first guide rail, and the inserting and pulling mechanism driver is in linkage with the spring bolt inserting and pulling mechanism through the first driving block; the simulation unlocking mechanism is installed on the first guide rail in a sliding mode, the simulation unlocking mechanism comprises simulation fingers, and the simulation fingers can press the lock head and unlock the lock tongue; and the unlocking mechanism driver comprises a second driving block, the unlocking mechanism driver is used for driving the simulation unlocking mechanism to slide back and forth on the first guide rail, and the unlocking mechanism driver and the simulation unlocking mechanism are linked through the second driving block.

Description

Technical Field

[0001] The invention relates to the technical field of automobile testing, in particular to a seat belt plugging and unlocking mechanism. Background Art

[0002] Seat belts are important protective structures in cars. When a car collides, seat belts can restrain the displacement of drivers and passengers and buffer the impact energy, thereby providing safety protection for passengers.

[0003] During the production process of seat belts, the existing method of detecting them is to use two servo drive systems. One system is directly connected to a force sensor and directly drives the lock tongue to apply pressure (pulling) force to the lock tongue. The other system is directly connected to a force sensor and drives a simulated finger to press the unlock button. Because the detection system and the product being tested have a certain rigidity, the instantaneous stroke of the lock tongue when inserting and unlocking the lock head is extremely small. A slight change in the servo system stroke causes a large change in the pressure (pulling) force, that is, the slope of the servo system displacement and output force curve is large, and the force sensor feedback lags significantly behind the lock sensor signal (lock or unlock signal). Due to the rigid connection, when the unlock button is pressed to unlock, the lock tongue cannot be automatically ejected, and the actual working state of the product is not fully simulated. The lock sensor cannot timely feedback the unlocking signal. Based on the above two points, the detection force displayed by the existing technical structure system deviates greatly from the actual value of the product and cannot truly detect the product performance parameters.

[0004] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The object of the present invention is to provide a seat belt insertion, extraction and unlocking mechanism, which can accurately simulate and measure the insertion and extraction force of the seat belt.

[0006] To achieve the above-mentioned objectives, the present invention provides a seat belt plugging and unlocking mechanism, which comprises: a seat belt plugging and unlocking mechanism mounted on a base plate, used for assembling a lock tongue, and cooperating with a fixed lock head, and detecting the performance of the lock tongue and the lock head by measuring the force of inserting and unlocking the lock tongue into and out of the lock head; the mechanism comprises: a first guide rail; a lock tongue plugging and unlocking mechanism, the lock tongue plugging and unlocking mechanism being slidably mounted on the first guide rail, the lock tongue plugging and unlocking mechanism being capable of assembling a lock tongue and inserting and ejecting the lock tongue into and out of the lock head by sliding; a plugging and unlocking mechanism drive comprising a first drive block, the plugging and unlocking mechanism drive being used to drive the lock tongue plugging and unlocking mechanism to slide back and forth on the first guide rail, the plugging and unlocking mechanism drive being linked to the lock tongue plugging and unlocking mechanism through the first drive block; a simulation unlocking mechanism being slidably mounted on the first guide rail, the simulation unlocking mechanism comprising a simulation finger, the simulation finger being capable of pressing the lock head and unlocking the lock tongue; and an unlocking mechanism drive comprising a second drive block, the unlocking mechanism drive being used to drive the simulation unlocking mechanism to slide back and forth on the first guide rail, the unlocking mechanism drive being linked to the simulation unlocking mechanism through the second drive block.

[0007] In one embodiment of the present invention, the plug-in mechanism drive includes: a first load bearing, including a first unidirectional load bearing assembly and a first bidirectional load bearing assembly arranged in parallel; a second guide rail, the second guide rail is arranged between the first unidirectional load bearing assembly and the first bidirectional load bearing assembly; a first screw, one end of the first screw is rotatably fixed on the first unidirectional load bearing assembly, and the other end is rotatably fixed on the first bidirectional load bearing assembly; a first motor, the first motor includes a first servo motor and a first motor seat, the first motor seat is used to install the first servo motor, the first servo motor is connected to the other end of the first screw through a first coupling, and the first motor is used to control the movement of the first screw; a first drive block, the first drive block includes a first terminal and a second terminal, the first terminal is installed on the first screw and can move with the movement of the first screw, the bottom of the first terminal is provided with a first guide rail slider, the first guide rail slider can slide on the second guide rail; the second terminal is slidably connected to the lock tongue plug-in mechanism, and the movement of the first terminal can drive the movement of the second terminal.

[0008] In one embodiment of the present invention, the lock tongue insertion and extraction mechanism includes: a lock tongue bracket, including a lock tongue bracket body, a second guide rail slider, a first force sensor, and a first force sensor bracket, one end of the lock tongue bracket body is used to fix the lock tongue, and the other end is fixed to one end of the first force sensor, and the first force sensor is used to sense the force applied to the lock tongue; the second guide rail slider can be slidably connected to the first guide rail, one end of the first force sensor bracket is fixed to the first force sensor, and the other end is installed on the second guide rail slider; a first drive bracket, the first drive bracket includes a first drive bracket body, and a first drive member; the first drive bracket body includes a first cross plate, a second cross plate, and a connecting plate, the first cross plate A horizontal plate is parallel to the second horizontal plate, and the first horizontal plate and the first horizontal plate are connected by the connecting plate, and the connecting plate is perpendicular to the first horizontal plate and the second horizontal plate, and the connecting plate can be fixed on the second guide rail slider to realize the linkage between the lock tongue bracket and the first drive bracket; the first driving member includes a first guide column, a first lock tongue spring, and a second lock tongue spring, the first guide column is arranged between the first horizontal plate and the second horizontal plate, one end of the second terminal is slidably connected to the first guide column, the first lock tongue spring is arranged on the outside of the first guide column between the first horizontal plate and the second terminal, and the second lock tongue spring is arranged on the outside of the first guide column between the second horizontal plate and the second terminal.

[0009] In one embodiment of the present invention, the unlocking mechanism drive includes: a second load bearing, including a second unidirectional load bearing assembly and a second bidirectional load bearing assembly arranged in parallel; a third guide rail, the third guide rail is arranged between the second unidirectional load bearing assembly and the second bidirectional load bearing assembly; a second lead screw, one end of the second lead screw is rotatably fixed on the second unidirectional load bearing assembly, and the other end is rotatably fixed on the second bidirectional load bearing assembly; a second motor, the second motor includes a second servo motor and a second motor seat, the second motor seat is used to install the second servo motor, the second servo motor is connected to the other end of the second lead screw through a second coupling, and the second motor is used to control the movement of the second lead screw; a second drive block, the second drive block includes a third terminal and a fourth terminal, the third terminal is installed on the second lead screw and can move with the movement of the second lead screw, a third guide rail slider is provided at the bottom of the third terminal, and the third guide rail slider can slide on the third guide rail; the fourth terminal is slidably connected to the simulation unlocking mechanism, and the movement of the third terminal can drive the movement of the fourth terminal.

[0010] In one embodiment of the present invention, the simulation unlocking mechanism also includes: a simulation finger bracket, a fourth guide rail slider, a second force sensor, and a second force sensor bracket, the simulation finger is installed at one end of the second force sensor, and the other end of the second force sensor is installed on the second force sensor bracket, the second force sensor is used to measure the force applied to the simulation finger, the fourth guide rail slider is slidingly connected to the first guide rail, and the second force sensor bracket is fixed on the fourth guide rail slider; a second drive bracket includes a second drive bracket body, and a second drive member, the second drive member includes a second guide column, and an unlocking drive spring arranged outside the second guide column, the second drive bracket body is fixed on the fourth guide rail slider, and the second drive bracket body is fixedly connected to one end of the second guide column, the end head of the other end of the second guide column is provided with a limiting structure, the limiting structure is used to limit the outward displacement of the fourth terminal, the fourth terminal is slidingly connected to the second guide column, and the unlocking drive spring is located between the fourth terminal and the second drive bracket body.

[0011] In one embodiment of the present invention, the simulation unlocking mechanism is located between the lock tongue inserting and extracting mechanism and the lock head.

[0012] In one embodiment of the present invention, the first drive block and the first screw are connected by a first ball nut, and the first ball nut includes a first internal threaded hole and a first flange surface; the second drive block and the second screw are connected by a second ball nut, and the second ball nut includes a second internal threaded hole and a second flange surface.

[0013] In one embodiment of the present invention, a plurality of limit position sensors are provided on both sides of the plug-in mechanism drive, and a plurality of limit position sensors are provided on both sides of the unlocking mechanism drive.

[0014] In one embodiment of the present invention, a simulated finger displacement sensor is provided at the bottom of the second driving bracket, and a lock tongue displacement sensor is provided at the bottom of the first driving bracket.

[0015] In one embodiment of the present invention, first limiting structures are provided at both ends of the first driving bracket, and a second limiting structure is provided at one end of the second driving bracket close to the lock head.

[0016] Compared with the prior art, the plug-in and unlocking mechanism of a safety belt according to the present invention drives the movement of the lock tongue plug-in mechanism through the plug-in mechanism, driving the lock tongue to be inserted into the lock head. The lock tongue plug-in mechanism is provided with a first force sensor, which can measure the insertion force of the lock tongue into the lock head, and judge whether the insertion force of the lock head is qualified by judging whether it meets the preset set value. After the lock head is inserted, the plug-in mechanism drives the lock tongue plug-in mechanism in reverse to apply a pre-tightening force to the lock tongue. The simulated unlocking mechanism presses the unlocking button on the lock head under the action of the unlocking mechanism. The simulated unlocking mechanism is provided with a second force sensor, which can measure the pressure of the simulated finger pressing the unlocking button. By judging whether it meets the preset value, it can be determined whether the unlocking force of the lock head is qualified. The two are combined to detect whether the product performance parameters of the lock tongue and the lock head are qualified by judging whether the insertion force and unlocking force are qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram of a seat belt insertion and unlocking mechanism in use according to one embodiment of the present invention;

[0018] Figure 2 This is a structural diagram of a tongue inserting and removing mechanism and an inserting and removing mechanism driving mechanism of a seat belt inserting and removing and unlocking mechanism according to one embodiment of the present invention;

[0019] Figure 3 1. A top view of a tongue inserting and removing mechanism and an inserting and removing mechanism driving mechanism of a seat belt inserting and removing and unlocking mechanism according to one embodiment of the present invention;

[0020] Figure 4 is a side view of a tongue inserting and removing mechanism and an inserting and removing mechanism driver of a seat belt inserting, removing, and unlocking mechanism according to one embodiment of the present invention;

[0021] Figure 5 This is a structural diagram of a simulated unlocking mechanism and unlocking mechanism drive of a seat belt insertion and unlocking mechanism according to one embodiment of the present invention;

[0022] Figure 6 is a top view of a simulated unlocking mechanism and unlocking mechanism drive of a seat belt insertion and unlocking mechanism according to one embodiment of the present invention;

[0023] Figure 7 The figure is a side view of a simulated unlocking mechanism and unlocking mechanism driving of a seat belt insertion and unlocking mechanism according to one embodiment of the present invention.

[0024] Description of main reference numerals:

[0025] 1-first guide rail, 2-lock tongue insertion and extraction mechanism, 21-lock tongue bracket, 211-lock tongue bracket body, 212-second guide rail slider, 213-first force sensor, 214-first force sensor bracket, 22-first drive bracket, 221-first drive bracket body, 2211-first horizontal plate, 2212-second horizontal plate, 2213-connecting plate, 222-first drive member, 2221-first guide column, 2222-first lock tongue spring, 2223-second lock Tongue spring, 23-lock tongue, 3-plug-in mechanism drive, 31-first drive block, 311-first terminal, 312-second terminal, 313-first guide rail slider, 32-first load bearing, 321-first unidirectional load bearing assembly, 322-first bidirectional load bearing assembly, 33-second guide rail, 34-first lead screw, 35-first motor, 351-first servo motor, 352-first motor seat, 36-first coupling, 37-first ball nut, 4- Simulated unlocking mechanism, 41-simulated finger, 42-simulated finger bracket, 421-fourth guide rail slider, 422-second force sensor, 423-second force sensor bracket, 43-second drive bracket, 431-second drive bracket body, 432-second drive member, 4321-second guide column, 4322-unlocking drive spring, 4323-limiting structure, 5-unlocking mechanism drive, 51-second drive block, 511-third terminal, 512-fourth terminal, 51 3-third guide rail slider, 52-second load bearing, 521-second unidirectional load bearing assembly, 522-second bidirectional load bearing assembly, 53-third guide rail, 54-second screw, 55-second motor, 551-second servo motor, 552-second motor seat, 56-second coupling, 57-second ball nut, 6-limit position sensor, 7-simulated finger displacement sensor, 8-lock tongue displacement sensor, 9-first limiting structure, 10-second limiting structure. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0027] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.

[0028] Invention concept:

[0029] In the process of connecting the seat belt lock tongue and the lock head of the seat belt insertion and unlocking mechanism of the present application, there are four states:

[0030] State 1 (disengaged state): At this time, the lock head and the lock tongue are not in contact with each other. The on-board computer judges through the lock sensor on the lock head that the seat belt is in a non-working state.

[0031] State 2 (insertion state): At this time, the sensor determines that the seat belt has entered the working state.

[0032] State 3 (locked state): The seat belt pulls the lock tongue, applying a seat belt preload force N2 to the lock tongue. The sensor determines that the seat belt is in the working state. When working, the lock tongue is subjected to a force N = N 2 (the seat belt preload force set by the product) + N3 (the internal pop-up force of the lock head).

[0033] State 4 (unlocked state): Press the unlock button, the lock tongue automatically pops out of the lock head, and the sensor determines that the seat belt is in the unlocked state.

[0034] Before shipment, the lock must be tested in both states 2 and 4. In state 2, the lock tongue must be inserted into the lock head to test whether the two are locked together under the application of an insertion force F1. A pass is achieved when F1 ≤ the set value N1. In state 4, the set preload force N2 is first applied to the lock head. Then, the unlocking button is pressed to test the unlocking force F2, causing the lock tongue to eject. A pass is achieved when the set value F2min ≤ F2 ≤ the set value F2max.

[0035] In this application, during the insertion test, the servo system drives the spring to push the force measuring device to apply a compressive (tensile) force to the product being tested. The force value at the output end changes by ΔF1 = ΔS*μ, where ΔS is the displacement change of the servo system and μ is the elastic modulus of the spring. By indirectly driving the lock tongue to insert into the lock head through the spring, the accuracy of the detection force can be significantly improved. The smaller the elastic modulus μ, the higher the accuracy. The insertion and removal of the lock tongue is simulated by human fingers with a certain degree of elasticity. When the unlock button is pressed to unlock, the spring simulates the preload force of the seat belt to eject the lock tongue.

[0036] like Figures 1 to 7As shown, according to a preferred embodiment of the present invention, a seat belt plugging and unlocking mechanism, environment: the seat belt plugging and unlocking mechanism is installed on a base plate, used to assemble the lock tongue 23, and cooperate with the fixed lock head, by measuring the force of the lock tongue 23 inserting and unlocking the lock head, the performance of the lock tongue 23 and the lock head is detected; it includes: a first guide rail 1; a lock tongue 23 plugging and unplugging mechanism 2, the lock tongue 23 plugging and unplugging mechanism is slidably installed on the first guide rail 1, the lock tongue 23 plugging and unplugging mechanism 2 can assemble the lock tongue 23, and insert and eject the lock tongue 23 into and out of the lock head by sliding; a plugging and unplugging mechanism drive 3, including a first drive block 31, the plugging and unplugging mechanism drive 3 is used to drive The lock tongue 23 plug-in and pull-out mechanism 2 slides back and forth on the first guide rail 1, and the plug-in and pull-out mechanism drive 3 and the lock tongue 23 plug-in and pull-out mechanism 2 are linked by a first drive block 31; the simulation unlocking mechanism 4, the simulation unlocking mechanism 4 is slidably installed on the first guide rail 1, the simulation unlocking mechanism 4 includes a simulation finger 41, and the simulation finger 41 can press the lock head and unlock the lock tongue 23; the unlocking mechanism drive 5 includes a second drive block 51, and the unlocking mechanism drive 5 is used to drive the simulation unlocking mechanism 4 to slide back and forth on the first guide rail 1, and the unlocking mechanism drive 5 and the simulation unlocking mechanism 4 are linked by the second drive block 51.

[0037] Specifically, the lock includes a lock unlocking button. One end of the first drive block 31 is connected to the plug-in mechanism 2 of the lock tongue 23, and the other end is connected to the plug-in mechanism drive 3. One end of the second drive block 51 is connected to the simulation unlocking mechanism 4, and the other end is connected to the unlocking mechanism drive 5. During use, the plug-in mechanism drive 3 provides an insertion driving force to the plug-in mechanism 2 of the lock tongue 23, causing it to move along the first guide rail 1. After the lock tongue 23 contacts the lock head, the plug-in driving force is provided to insert the lock tongue 23 into the lock head. When it is detected that the lock tongue 23 and the lock head are locked, the plug-in mechanism drive 3 stops providing the insertion driving force and instead provides a reverse pre-tightening driving force to cause it to move in the reverse direction. After the pre-tightening force equals a preset value, the unlocking mechanism drive 5 provides an unlocking driving force to the driving simulation unlocking mechanism 4, causing it to move along the first guide rail 1. After the simulated finger 41 contacts the lock unlocking button, the unlocking driving force is provided to cause the simulated finger 41 to press the unlocking button.

[0038] As a preferred embodiment, the plug-in mechanism drive 3 includes: a first load bearing 32, including a first unidirectional load bearing assembly 321 and a first bidirectional load bearing assembly 322 arranged in parallel; a second guide rail 33, the second guide rail 33 is arranged between the first unidirectional load bearing assembly 321 and the first bidirectional load bearing assembly 322; a first screw 34, one end of the first screw 34 is rotatably fixed to the first unidirectional load bearing assembly 321, and the other end is rotatably fixed to the first bidirectional load bearing assembly 322; a first motor 35, the first motor 35 includes a first servo motor 351 and a first motor base 352, the first motor base 352 is used to mount the first servo motor 35 1, the first servo motor 351 is connected to the other end of the first lead screw 34 through a first coupling 36, and the first motor 35 is used to control the movement of the first lead screw 34; the first driving block 31, the first driving block 31 includes a first terminal 311 and a second terminal 312, the first terminal 311 is installed on the first lead screw 34, and can move with the movement of the first lead screw 34, and a first guide rail slider 313 is provided at the bottom of the first terminal 311, and the first guide rail slider 313 can slide on the second guide rail 33; the second terminal 312 is slidably connected to the locking tongue 23 plug-in mechanism 2, and the movement of the first terminal 311 can drive the movement of the second terminal 312.

[0039] Specifically, the first unidirectional load bearing assembly 321 and the first bidirectional load bearing assembly 322 are used to support the first lead screw 34. The first servo motor 351 drives the first lead screw 34 to rotate via the first coupling 36. The first ball nut 37 pushes the first drive block 31 and the first guide rail slider 313 to reciprocate linearly along the second guide rail 33. The first drive block 31 can respectively push and compress the first lock tongue spring 2222 and the second lock tongue spring 2223, thereby enabling the lock tongue 23 insertion and pre-tightening mechanism 2 to complete the insertion and pre-tightening of the lock tongue 23. The insertion and pre-tightening force is the current working pressure of the spring.

[0040] As a preferred embodiment, the lock tongue 23 plugging and pulling mechanism 2 includes: a lock tongue 23 bracket 21, including a lock tongue 23 bracket body 211, a second guide rail 33 slider 212, a first force sensor 213, and a first force sensor bracket 214, one end of the lock tongue 23 bracket body 211 is used to fix the lock tongue 23, and the other end is fixed to one end of the first force sensor 213, the first force sensor 213 is used to sense the force applied to the lock tongue 23; the second guide rail 33 slider 212 can be slidably connected to the first guide rail 1, one end of the first force sensor bracket 214 is fixed to the first force sensor 213, and the other end is installed on the second guide rail 33 slider 212; a first driving bracket 22, the first driving bracket 22 includes a first driving bracket body 221, and a first driving member 222; the first driving bracket body 221 includes a first transverse plate 2211, a second transverse plate 2212, and a connecting plate 2213, the first transverse plate 2211 and the second transverse plate 2 212 is parallel, the first transverse plate 2211 and the first transverse plate 2211 are connected by the connecting plate 2213, and the connecting plate 2213 is perpendicular to the first transverse plate 2211 and the second transverse plate 2212. The connecting plate 2213 can be fixed on the second guide rail 33 slider 212 to realize the linkage of the lock tongue 23 bracket 21 and the first driving bracket 22; the first driving member 222 includes a first guide post 2221, a first lock tongue spring 2222, and a second lock tongue spring 2223, the first guide post 2221 is arranged between the first transverse plate 2211 and the second transverse plate 2212, one end of the second terminal 312 is slidably connected to the first guide post 2221, the first lock tongue spring 2222 is arranged on the outside of the first guide post 2221 between the first transverse plate 2211 and the second terminal 312, and the second lock tongue spring 2223 is arranged on the outside of the first guide post 2221 between the second transverse plate 2212 and the second terminal 312.

[0041] Specifically, the first horizontal plate 2211 is a horizontal plate close to one end of the lock head, and the second horizontal plate 2212 is a horizontal plate away from one end of the lock head. The first lock tongue spring 2222 is an insertion drive spring, which is used to drive the lock tongue 23 bracket 21 to move when inserted. The second lock tongue spring 2223 is a pre-tightening drive spring, which is used to apply a pre-tightening force to the lock tongue 23 by pulling the lock tongue 23 bracket 21 when unplugging. During the plugging and unplugging process, the spring indirectly drives the lock tongue 23 to improve the force application accuracy and protect the force sensor. As the spring compression increases by ΔS, the plugging and unplugging force increases by ΔF1=ΔS*μ, avoiding a sudden increase in the plugging and unplugging force, reducing the displacement accuracy control requirements of the first drive block 31, and reducing the system response time requirements. During insertion, the first drive block 31 moves in the insertion direction, compressing the insertion drive spring (after the lock tongue 23 contacts the lock head). This pushes the first drive bracket body 221, the first force sensor bracket 214, the first force sensor 213, and the lock tongue 23 to slide linearly on the first guide rail 1, inserting the lock tongue 23 into the lock head. The first lock tongue spring 2222 (insertion drive spring) simulates the elasticity of a human finger and flexibly applies force to the lock tongue 23. This prevents a slight displacement of the front end of the lock tongue 23 from rigidly contacting the bottom of the lock head, which would cause a linear increase in the insertion force, thereby protecting the force sensor. When pulling out: the first driving block 31 moves along the pulling out direction, the second lock tongue spring 2223 (pre-tightening driving spring) is compressed, pushing the first driving bracket body 221, the first force sensor bracket 214, the first force sensor 213, and the lock tongue 23 to slide linearly on the first guide rail 1, applying a preset simulated seat belt pre-tightening force to the lock tongue 23. When the lock head unlocking button is pressed and unlocked, the second lock tongue spring 2223 pre-tightening driving spring simulates the seat belt pre-tightening force, and pops out the lock tongue 23. At this time, the first driving block 31 remains stationary. This process completely simulates the actual usage state.

[0042] As a preferred embodiment, the unlocking mechanism drive 5 includes: a second load bearing 52, including a second unidirectional load bearing assembly 521 and a second bidirectional load bearing assembly 522 arranged in parallel; a third guide rail 53, wherein the third guide rail 53 is arranged between the second unidirectional load bearing assembly 521 and the second bidirectional load bearing assembly 522; a second lead screw 54, wherein one end of the second lead screw 54 is rotatably fixed to the second unidirectional load bearing assembly 521, and the other end is rotatably fixed to the second bidirectional load bearing assembly 522; a second motor 55, wherein the second motor 55 includes a second servo motor 551 and a second motor base 552, wherein the second motor base 552 is used to mount the second servo motor 551 , the second servo motor 551 is connected to the other end of the second lead screw 54 through a second coupling 56, and the second motor 55 is used to control the movement of the second lead screw 54; the second driving block 51, the second driving block 51 includes a third terminal 511 and a fourth terminal 512, the third terminal 511 is installed on the second lead screw 54, and can move with the movement of the second lead screw 54, and a third guide rail 53 slider 513 is provided at the bottom of the third terminal 511, and the third guide rail 53 slider 513 can slide on the third guide rail 53; the fourth terminal 512 is slidably connected to the simulation unlocking mechanism 4, and the movement of the third terminal 511 can drive the movement of the fourth terminal 512.

[0043] Specifically, the second one-way load bearing assembly 521 and the second two-way load bearing assembly 522 are used to support the second lead screw 54. The second servo motor 551 drives the second lead screw 54 to rotate via the second coupling 56. The second ball nut 57 drives the second drive block 51 and the slider 513 of the third guide rail 53 to reciprocate linearly along the third guide rail 53. The second drive block 51 can push and compress the unlocking drive spring 4322, realizing that the simulated unlocking mechanism 4 can complete the unlocking of the lock by simulating the finger 41 pressing the unlocking button of the lock.

[0044] As a preferred embodiment, the simulation unlocking mechanism 4 further includes: a simulation finger bracket 42, a fourth guide rail slider 421, a second force sensor 422, and a second force sensor bracket 423, the simulation finger 41 is mounted on one end of the second force sensor 422, the other end of the second force sensor 422 is mounted on the second force sensor bracket 423, the second force sensor 422 is used to measure the force of the simulation finger 41, the fourth guide rail slider 421 is slidably connected to the first guide rail 1, and the second force sensor bracket 423 is fixed on the fourth guide rail slider 421; a second drive bracket 43, including a second drive bracket body 431, and a second drive bracket body 432. Part 432, the second driving part 432 includes a second guide column 4321, and an unlocking driving spring 4322 arranged outside the second guide column 4321, the second driving bracket body 431 is fixed on the fourth guide rail slider 421, and the second driving bracket body 431 is fixedly connected to one end of the second guide column 4321, and the end of the other end of the second guide column 4321 is provided with a limiting structure 4323, the limiting structure 4323 is used to limit the outward displacement of the fourth terminal 512, the fourth terminal 512 is slidably connected to the second guide column 4321, and the unlocking driving spring 4322 is located between the fourth terminal 512 and the second driving bracket body 431.

[0045] Specifically, indirectly driving the lock tongue 23 through a spring can improve the force application accuracy and protect the force sensor. As the spring compression increases by ΔS, the unlocking force increases by ΔF2 = ΔS*μ, reducing the drive block displacement accuracy control requirements and reducing the system response time requirements. The second drive block 51 compresses the unlocking drive spring 4322, pushing the second drive bracket 43 to move, thereby driving the second force sensing bracket to move, pushing the simulated finger 41, and causing the simulated finger 41 to press on the unlocking button of the lock. The second drive block 51 continues to move, continues to compress the unlocking drive spring 4322, and drives the unlocking spring to continue to move. The spring is continuously pressed until the feedback from the second force sensor 422 reaches the set pressure F2, detecting whether the lock tongue 23 is unlocked (popped out of the lock head). If the unlocking force F2 is within the set qualified range and the lock tongue 23 pops out, it is judged to be qualified.

[0046] As a preferred embodiment, the simulation unlocking mechanism 4 is located between the lock tongue 23 plug-in mechanism 2 and the lock head.

[0047] Specifically, the lock tongue 23 bracket body 211 is in the shape of an elongated arm. The length of the lock tongue 23 bracket body 211 plus the lock tongue 23 is greater than the length of the simulated finger bracket 42. When the lock tongue 23 is inserted into the lock head, it does not affect the compression distance required by the simulated finger 41 structure to drive the unlocking drive spring 4322. Since the lock tongue 23 needs to continue to apply preload force after the lock tongue 23 is inserted into the lock head, the lock tongue 23 plug-in mechanism 2 needs to continue to move backward. Therefore, to prevent the second guide rail 33 slider 212 and the fourth guide rail slider 421 on the first guide rail 1 from interfering with each other, the lock tongue 23 plug-in mechanism 2 should be located behind the simulated unlocking mechanism 4, that is, the simulated unlocking mechanism 4 is located between the lock tongue 23 plug-in mechanism 2 and the lock head.

[0048] As a preferred embodiment, the first drive block 31 and the first screw 34 are connected by a first ball nut 37, and the first ball nut 37 includes a first internal threaded hole and a first flange surface; the second drive block 51 and the second screw 54 are connected by a second ball nut 57, and the second ball nut 57 includes a second internal threaded hole and a second flange surface.

[0049] Specifically, the first internal threaded hole is sleeved on the first screw 34, and the first flange surface is mounted on the second driving block 51. The second internal threaded hole is sleeved on the second screw 54, and the second flange surface is mounted on the first driving block 31.

[0050] As a preferred embodiment, a plurality of limit position sensors 6 are provided on both sides of the plug-in mechanism drive 3 , and a plurality of limit position sensors 6 are provided on both sides of the unlocking mechanism drive 5 .

[0051] Specifically, the limit position sensor 6 is used to limit the first servo motor 351 and the second servo motor 551 from excessively pushing the first lead screw 34 and the second lead screw 54 to move linearly.

[0052] As a preferred embodiment, a simulated finger displacement sensor 7 is provided at the bottom of the second driving bracket 43 , and a lock tongue displacement sensor 8 is provided at the bottom of the first driving bracket 22 .

[0053] Specifically, the simulated finger displacement sensor 7 is used to detect the displacement distance of the simulated finger 41 . The lock tongue displacement sensor 8 is used to detect the displacement distance of the lock tongue 23 .

[0054] As a preferred embodiment, the first driving bracket 22 is provided with a first limiting structure 9 at both ends, and the second driving bracket 43 is provided with a second limiting structure 10 at one end close to the lock head.

[0055] Specifically, as a preferred embodiment, there are two first limiters, which are respectively set at the front and rear ends of the first drive bracket 22. The front and rear ends refer to the ends close to the lock head and away from the lock head along the direction of the first guide rail 1. It can also be set at other positions, as long as it can limit the excessive movement of the first drive bracket 22 forward and backward along the first guide rail 1, so that it can apply sufficient insertion and extraction force and pre-tightening force to the lock tongue 23 without interfering with the movement of the simulated unlocking mechanism 4. The second limiter is set at one end of the simulated unlocking mechanism 4 close to the lock head, and is used to limit the simulated finger 41 from excessively pressing and causing damage to the lock head.

[0056] By adopting the above technical solution, a seat belt insertion and unlocking mechanism is provided. The insertion and unlocking mechanism 2 of the lock tongue 23 is driven by the insertion and unlocking mechanism driver 3 to move, driving the lock tongue 23 to insert into the lock head. The insertion and unlocking mechanism 2 of the lock tongue 23 is provided with a first force sensor 213, which can measure the insertion force of the lock tongue 23 into the lock head. The qualified lock head insertion force is determined by judging whether the force meets a preset set value. After the lock head is inserted, the insertion and unlocking mechanism driver 3 reversely drives the insertion and unlocking mechanism 2 of the lock tongue 23, applying a preload force to the lock tongue 23. The simulated unlocking mechanism 4 presses the unlocking button on the lock head under the action of the unlocking mechanism driver 5. The simulated unlocking mechanism 4 is provided with a second force sensor 422, which can measure the pressure of the simulated finger 41 pressing the unlocking button. The qualified lock head unlocking force is determined by judging whether the force meets a preset value. The combination of the two, through the qualified insertion force and unlocking force, can detect the qualified product performance parameters of the lock tongue 23 and the lock head.

[0057] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A seat belt plugging and unlocking mechanism, characterized in that: Environment: The seat belt insertion and unlocking mechanism is mounted on a base plate, used to assemble the lock tongue and cooperate with the fixed lock head. The performance of the lock tongue and lock head is tested by measuring the force required to insert the lock tongue into and unlock the lock head. comprising: a first guide rail; A lock tongue insertion and extraction mechanism, the lock tongue insertion and extraction mechanism being slidably mounted on the first guide rail, the lock tongue insertion and extraction mechanism being capable of assembling a lock tongue and inserting and ejecting the lock tongue into and out of the lock head by sliding; A plug-in mechanism drive, comprising a first drive block, the plug-in mechanism drive being used to drive the bolt plug-in mechanism to slide back and forth on the first guide rail, the plug-in mechanism drive and the bolt plug-in mechanism being linked via the first drive block; A simulated unlocking mechanism, the simulated unlocking mechanism being slidably mounted on the first guide rail, the simulated unlocking mechanism comprising a simulated finger, the simulated finger being capable of pressing the lock head and unlocking the lock tongue; The unlocking mechanism drive includes a second drive block, and the unlocking mechanism drive is used to drive the simulation unlocking mechanism to slide back and forth on the first guide rail. The unlocking mechanism drive and the simulation unlocking mechanism are linked through the second drive block.

2. A seat belt insertion and unlocking mechanism according to claim 1, characterized in that: The plug-in mechanism driving includes: The first load bearing comprises a first one-way load bearing assembly and a first two-way load bearing assembly arranged in parallel; a second guide rail disposed between the first one-way load bearing assembly and the first two-way load bearing assembly; a first lead screw, one end of the first lead screw being rotatably fixed to the first unidirectional load bearing assembly, and the other end of the first lead screw being rotatably fixed to the first bidirectional load bearing assembly; a first motor, comprising a first servo motor and a first motor base, the first motor base being used to mount the first servo motor, the first servo motor being connected to the other end of the first lead screw via a first coupling, the first motor being used to control movement of the first lead screw; The first driving block includes a first terminal and a second terminal. The first terminal is installed on the first lead screw and can move with the movement of the first lead screw. A first guide rail slider is provided at the bottom of the first terminal, and the first guide rail slider can slide on the second guide rail; the second terminal is slidably connected to the lock tongue plug-in mechanism, and the movement of the first terminal can drive the movement of the second terminal.

3. A seat belt insertion and unlocking mechanism according to claim 2, characterized in that: The lock tongue inserting and extracting mechanism comprises: A lock tongue bracket, comprising a lock tongue bracket body, a second guide rail slider, a first force sensor, and a first force sensor bracket, wherein one end of the lock tongue bracket body is used to fix the lock tongue, and the other end is fixed to one end of the first force sensor, and the first force sensor is used to sense the force applied to the lock tongue; the second guide rail slider is capable of sliding connection with the first guide rail, and one end of the first force sensor bracket is fixed to the first force sensor, and the other end is mounted on the second guide rail slider; The first driving bracket, the first driving bracket includes a first driving bracket body and a first driving member; the first driving bracket body includes a first transverse plate, a second transverse plate, and a connecting plate, the first transverse plate and the second transverse plate are parallel, the first transverse plate and the first transverse plate are connected by the connecting plate, the connecting plate is perpendicular to the first transverse plate and the second transverse plate, and the connecting plate can be fixed on the second guide rail slider to realize the linkage of the lock tongue bracket and the first driving bracket; the first driving member includes a first guide post, a first lock tongue spring, and a second lock tongue spring, the first guide post is arranged between the first transverse plate and the second transverse plate, one end of the second terminal is slidably connected to the first guide post, the first lock tongue spring is arranged on the outside of the first guide post between the first transverse plate and the second terminal, and the second lock tongue spring is arranged on the outside of the first guide post between the second transverse plate and the second terminal.

4. A seat belt insertion and unlocking mechanism according to claim 3, characterized in that: The unlocking mechanism driving includes: A second load bearing comprises a second one-way load bearing assembly and a second two-way load bearing assembly arranged in parallel; a third guide rail disposed between the second one-way load bearing assembly and the second two-way load bearing assembly; a second lead screw, one end of the second lead screw being rotatably fixed to the second unidirectional load bearing assembly and the other end of the second lead screw being rotatably fixed to the second bidirectional load bearing assembly; a second motor, comprising a second servo motor and a second motor base, the second motor base being used to mount the second servo motor, the second servo motor being connected to the other end of the second lead screw via a second coupling, the second motor being used to control the movement of the second lead screw; The second driving block includes a third terminal and a fourth terminal, the third terminal is installed on the second lead screw, and can move with the movement of the second lead screw, and a third guide rail slider is provided at the bottom of the third terminal, and the third guide rail slider can slide on the third guide rail; the fourth terminal is slidably connected to the simulation unlocking mechanism, and the movement of the third terminal can drive the movement of the fourth terminal.

5. A seat belt insertion and unlocking mechanism according to claim 4, characterized in that: The simulation unlocking mechanism also includes: A simulated finger bracket, a fourth guide rail slider, a second force sensor, and a second force sensor bracket, wherein the simulated finger is mounted on one end of the second force sensor, the other end of the second force sensor is mounted on the second force sensor bracket, the second force sensor is used to measure the force applied to the simulated finger, the fourth guide rail slider is slidably connected to the first guide rail, and the second force sensor bracket is fixed to the fourth guide rail slider; The second drive bracket includes a second drive bracket body and a second drive member, the second drive member includes a second guide column and an unlocking drive spring arranged outside the second guide column, the second drive bracket body is fixed on the fourth guide rail slider, and the second drive bracket body is fixedly connected to one end of the second guide column, the other end of the second guide column is provided with a limiting structure, the limiting structure is used to limit the outward displacement of the fourth terminal, the fourth terminal is slidably connected to the second guide column, and the unlocking drive spring is located between the fourth terminal and the second drive bracket body.

6. A seat belt insertion and unlocking mechanism according to claim 1, characterized in that: The simulation unlocking mechanism is located between the lock tongue inserting and extracting mechanism and the lock head.

7. A safety belt insertion and unlocking mechanism according to claim 5, characterized in that: The first driving block and the first lead screw are connected via a first ball nut, wherein the first ball nut includes a first internal threaded hole and a first flange surface; The second driving block and the second lead screw are connected via a second ball nut, and the second ball nut includes a second internal threaded hole and a second flange surface.

8. A seat belt insertion and unlocking mechanism according to claim 1, characterized in that: A plurality of limit position sensors are provided on both sides of the plug-in mechanism drive, and a plurality of limit position sensors are provided on both sides of the unlocking mechanism drive.

9. A safety belt insertion and unlocking mechanism according to claim 5, characterized in that: A simulated finger displacement sensor is provided at the bottom of the second driving bracket, and a lock tongue displacement sensor is provided at the bottom of the first driving bracket.

10. A safety belt insertion and unlocking mechanism according to claim 5, characterized in that: The first driving bracket is provided with a first limiting structure at both ends, and the second driving bracket is provided with a second limiting structure at one end close to the lock head.

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