Infant seat safety performance detection equipment and detection method thereof

Abstract

The invention relates to the technical field of baby products, in particular to baby seat safety performance detection equipment and a detection method thereof, and solves the defects in the prior art. The detection equipment comprises a workbench, a positioning mechanism, a force application mechanism, a clamping assembly and a resistance mechanism; a PLC is installed on the fixing frame, the positioning mechanism comprises first limiting strips and a limiting piece, the two first limiting strips relatively move on the workbench in the width direction of the workbench, the limiting piece penetrates through and is rotationally arranged between the first limiting strips on the two sides, and a plurality of detection springs are arranged on the portion, on one side of the limiting piece, of the workbench. The bottom end of each detection spring is provided with a pressure sensor, and a baby seat to be detected is placed between the first limiting strip and the limiting piece. Compared with the prior art, the device can simulate the safety performance detection effect of the baby seat.

Description

Technical Field

[0001] The present invention relates to the technical field of baby products, and in particular to a safety performance detection device and a detection method for a baby seat. Background Art

[0002] The infant seat is a product designed for infants 4 months and above. The seat can provide safe neck, back, leg and arm support. It is made of 100% easy-to-clean foam, lightweight and easy to carry. The seat has large legroom and a wide bottom bucket for babies to sit comfortably.

[0003] However, due to the light weight of the infant seat and the fact that some infants are prone to being active when sitting, the infant seat must be prevented from tilting when in use to avoid causing harm to the infant. However, there is currently no safety performance testing equipment for the infant seat on the market, and it is impossible to actually simulate the situation where the infant is active and causes the seat to tilt to one side when sitting on the seat. Therefore, it is necessary to provide a safety performance testing equipment and a testing method for an infant seat, which can achieve the purpose of simulating the safety performance of the infant seat. Summary of the invention

[0004] The object of the present invention is to provide a safety performance testing device and a testing method for an infant seat to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A safety performance testing device for an infant seat comprises a workbench, a positioning mechanism, a force applying mechanism, a clamping assembly and a resistance mechanism, wherein a fixing frame is installed on the workbench, and a PLC controller is installed on the fixing frame; The positioning mechanism includes a limiting strip 1 and a limiting member, wherein two limiting strips 1 are provided and relatively move on the workbench along the width direction of the workbench, the limiting member penetrates and is rotatably provided between the limiting strips 1 on both sides, a plurality of detection springs are provided on one side of the limiting member on the workbench, a pressure sensor is provided at the bottom end of each detection spring, and a baby seat to be detected is placed between the limiting strip 1 and the limiting member; The force-applying mechanism is arranged below the fixing frame, and a driven arm is rotatably arranged at the end of the force-applying mechanism, and the driven arm acts on the baby seat; The clamping assembly is fixed on the baby seat and arranged opposite to the force application direction of the driven arm, and a sliding adjustable movable block is arranged on the clamping assembly, and a contact sensor is also arranged on the movement path of the movable block; The resistance mechanism includes a base, an adjusting frame 1, an adjusting frame 2 and a tension spring. The base is installed on a workbench. The adjusting frame 1 and the adjusting frame 2 move relative to each other along the length direction of the base. The tension spring is installed between the opposite side walls of the adjusting frame 1 and the adjusting frame 2. The adjusting frame 1 is also provided with a fixed block connected to the movable block by a pull rope, and an adjusting gear capable of adjusting the position is also provided between the adjusting frame 1 and the adjusting frame 2.

[0006] In one embodiment, two supports are provided on the workbench, and a bidirectional screw is rotatably provided between the supports on both sides. The workbench is also provided with groove one and groove two, and a detection spring is provided in groove two. A sleeve is also provided on the outside of the detection spring, and the top surface of the sleeve is flush with the top surface of the workbench. The pressure sensor is installed on the bottom wall of groove two, and the pressure sensor is connected to the PLC controller through an electrical signal.

[0007] In one embodiment, a protrusion is provided at the bottom of one end of the limit strip 1, the protrusion is slidably arranged along the groove 1, and a guide rod is passed through the protrusion to be in sliding contact with the protrusion, the guide rod is fixed between the inner walls of the groove 1, and a bidirectional screw passes through the other end of the limit strips 1 on both sides and is threadedly matched with the limit strips 1, and an arc portion is also provided on the limit strip 1, and a through hole with a longitudinal section of a right-angle sector is opened below the arc portion; The longitudinal section of the limit piece is fan-shaped. The limit piece is arranged between the through holes on both sides, and the bottom end of the limit piece is always in contact with the right-angle end of the through hole. The bottom end of the limit piece is elastically provided with an elastic baffle with an arc structure between the inner walls of the workbench. One end of the elastic baffle is always in contact with one side wall of the limit piece. A slider is also slidably arranged on the limit piece, and the other end of the slider is arranged between the inner walls of the limit strip as the limit piece rotates.

[0008] In one embodiment, the force applying mechanism further includes a fixed shaft, a driving arm and an adjusting arm; The fixed shaft is installed in the middle of the bottom wall of the fixed frame, and a connecting head is also provided at the bottom end of the fixed shaft. One end of the driven arm is rotatably connected to the connecting head by means of a shaft connection. The driving arms are rotatably provided on both sides of the fixed shaft by means of a shaft connection. The driving arms on both sides are synchronously rotated and adjusted. One side of one of the driving arms is also connected to a motor 1, which is a rotating motor and is installed on the side wall of the fixed frame. The adjusting arm is arranged in an arc-shaped structure, and connecting shaft one and connecting shaft two are respectively passed through its two ends. Connecting shaft one is installed between the driven arms on both sides, and connecting shaft two slides between the driving arms on both sides, and the adjusting arm passes through the fixed shaft.

[0009] In one embodiment, the clamping assembly further comprises a clamping seat and a fastener; The clamp seat has a "U"-shaped structure. The clamp seat is arranged on the baby seat and is connected and fixed thereto by fasteners. The fasteners are set screws. A guide groove 2 is opened on a vertical side wall on one side of the clamp seat. The movable block slides between the inner walls of the guide groove 2. The contact sensor is embedded between the inner walls at the end of the guide groove 2. The contact sensor is connected to the PLC controller by electrical signals.

[0010] In one embodiment, a sliding hole is provided at the top of the adjusting frame 1, one end of the adjusting frame 2 slides between the inner walls of the sliding hole, a guide bar 1 connected to the adjusting frame 1 is provided on both side walls of the sliding hole, and a slide groove 1 is provided on both side walls of the bottom of the adjusting frame 1, a guide bar 2 connected to the adjusting frame 1 is provided on both side walls of the bottom of the adjusting frame 2, and a slide groove 2 is provided on both side walls of the top of the adjusting frame 2, the guide bar 1 slides and adjusts along the inner wall of the slide groove 2, and the guide bar 2 slides and adjusts along the inner wall of the slide groove 1; A tooth groove 1 is provided on the first adjusting frame along its length direction, and a tooth groove 2 is provided on the second adjusting frame along its length direction. The tooth groove 1 and the tooth groove 2 are arranged opposite to each other and correspond to each other. The adjusting gear is meshed and arranged between the tooth groove 1 and the tooth groove 2. A connecting block 1 is also provided on the first adjusting frame, and a connecting block 2 is also provided on the second adjusting frame. A tension spring is installed between the connecting block 1 and the connecting block 2. Among them, two limiting strips 2 are also installed on the base along the length direction thereof, and the bottom ends of the adjusting frame 1 and the adjusting frame 2 slide between the side walls of the two limiting strips 2.

[0011] In one embodiment, the resistance mechanism further includes an L bracket, a key shaft, a synchronization shaft, and an adjustment wheel; A side groove is provided on one side wall of the base along its length direction, one end of the L bracket slides between the inner walls of the side groove, and a screw rod threadedly matched with the end of the L bracket in the side groove penetrates through the end of the L bracket, and the screw rod is rotatably arranged between the inner walls of the side groove; One end of the synchronization shaft is rotatably arranged between the inner walls of the other end of the L bracket, a wheel disc is sleeved on the key shaft and fixedly connected thereto, keys connected to the key shaft as one body are arranged on both sides of the wheel disc on the key shaft, the key shaft and the adjustment gear are connected by a key, and the key shaft and the synchronization shaft can be slidably adjusted and synchronously rotated by a key connection; Motor 2 is installed on the outer surface of the synchronous shaft. Motor 2 is a linear motor. The adjusting wheel is installed on the output end of the linear motor. A limiting groove is opened along the circumferential surface of the wheel disc. The adjusting wheel is set between the inner walls of the limiting groove and on one side of it.

[0012] A method for testing a safety performance testing device for an infant seat comprises the following steps: S1. First, the baby seat is placed below the fixing frame and in the middle of the positioning mechanism, and the baby seat is positioned by the limiting strip 1 and the limiting member, so that the limiting strip 1 and the limiting member are both tangent to the circumferential surface of the baby seat; S2, then, control the L bracket to move so that it drives the adjusting gear to adjust the initial meshing position between the adjusting bracket 1 and the adjusting bracket 2, and stop after adjusting to the desired position and fix the position of the L bracket; S3. Then, by starting motor 1, it controls the rotation adjustment of the driving arm, thereby driving the rotation adjustment of the driven arm through the adjusting arm, and making the driven arm act on the baby seat, so that the baby seat is subjected to a force inclined to one side. As the driven arm continuously applies force to the baby seat, the clamp seat moves to one side synchronously with the baby seat. Under the action of the pull rope, the clamp seat drives the adjusting frame 1 to move synchronously, and then the adjusting frame 2 moves synchronously with the adjusting frame 1 in the opposite direction, thereby simulating the resistance generated when the baby sits on the baby seat. When the movable block slides out of the clamp seat, the contact sensor is triggered. At this time, the test stops, and the PLC controller calculates the average value of the data transmitted from multiple pressure sensors to obtain the force required to make the baby seat fall sideways under different resistance sizes.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: The present invention provides a positioning mechanism, a force-applying mechanism, a clamping assembly and a resistance mechanism, and utilizes the force-applying mechanism to apply a force in a certain direction to the baby seat, so that it shows a tendency to tilt. During the tilting process, a limit piece in contact with the baby seat is used to synchronously apply a force to a detection spring, and the resistance of the elastic baffle to the limit piece is ignored. The magnitude of the force that causes the baby seat to tilt under different resistances is obtained from the average value of multiple pressure sensors. In addition, during the tilting process, the cooperation between the clamping assembly and the resistance mechanism can simulate the resistance generated when a baby sits on the baby seat, so that the test result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0015] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the positioning mechanism of the present invention; Figure 3 It is a structural schematic diagram of the force applying mechanism of the present invention; Figure 4 is a schematic structural diagram of the clamping assembly of the present invention; Figure 5 It is a structural schematic diagram of the resistance mechanism of the present invention; Figure 6 yes Figure 5 Schematic diagram of the structure from another perspective.

[0016] In the figure: 1, workbench; 11, support; 111, bidirectional screw; 12, groove 1; 121, guide rod; 13, groove 2; 131, detection spring; 2, fixed frame; 21, PLC controller; 22, motor 1; 221, output shaft; 3, positioning mechanism; 31, limit strip 1; 311, bump; 312, through hole 1; 32, limit piece; 321, guide groove 1; 33, slider; 34, elastic baffle; 4, force mechanism; 41, fixed shaft; 411, through hole 2; 412, connector; 42, drive arm; 42 1. Through hole three; 43. Adjusting arm; 431. Connecting shaft one; 432. Connecting shaft two; 44. Follower arm; 5. Clamping assembly; 51. Clamping seat; 511. Guide groove two; 52. Fastener; 53. Movable block; 54. Contact sensor; 6. Resistance mechanism; 61. Base; 611. Limiting strip two; 62. Adjusting frame one; 621. Fixed block; 63. Adjusting frame two; 64. L bracket; 65. Tension spring; 66. Adjusting gear; 661. Key shaft; 662. Wheel; 67. Synchronous shaft; 68. Adjusting wheel; 69. Motor two. DETAILED DESCRIPTION

[0017] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0018] like Figure 1As shown, the present invention provides a technical solution: a safety performance testing device for an infant seat, comprising a workbench 1, a positioning mechanism 3, a force-applying mechanism 4, a clamping assembly 5 and a resistance mechanism 6, a fixing frame 2 of a "U"-shaped structure is fixed on the workbench 1 by bolts, a PLC controller 21 is installed on one side wall of the fixing frame 2 by screws, the positioning mechanism 3 is arranged on the top surface of the workbench 1, the infant seat is limited between the side walls of the positioning mechanism 3, a force-applying mechanism 4 is arranged above the infant seat, which can apply a force biased in a certain direction to the infant seat, and a clamping assembly 5 is also installed on the side wall of the infant seat, and a resistance mechanism 6 is arranged on the other side of the workbench 1, the clamping assembly 5 and the resistance mechanism 6 are connected by a pull rope, and the resistance mechanism 6 drives the clamping assembly 5 to apply resistance to the infant seat, so that when the force-applying mechanism 4 applies a force to the infant seat, the resistance effect generated when the infant sits on the infant seat can be simulated on the other side, so as to achieve a more realistic simulation test result.

[0019] like Figure 2 As shown, the positioning mechanism 3 includes a limiting strip 31, a limiting member 32, a slider 33 and an elastic blocking piece 34; Two limit strips 31 are symmetrically arranged, and a protrusion 311 connected to the bottom wall of the limit strip 31 is arranged integrally therewith, and an arc portion is arranged on the limit strip 31, a through hole 312 is opened on the arc portion, and a through hole is opened on the limit strip 31 below the arc portion, and the longitudinal section of the through hole is a right-angle sector.

[0020] The longitudinal section of the limiting member 32 is fan-shaped, and a guide groove 321 is provided on the top surface of the limiting member 32 along its length direction. Two sliders 33 are slidably provided between the inner walls of the guide groove 321. The bottom end of the slider 33 is located between the inner walls of the guide groove 321, and the top end of the slider 33 is located between the inner walls of the through hole 312. The two sliders 33 are respectively provided on the two limiting strips 31. A miniature elastic baffle 34 with an arc-shaped structure is also provided on one side of the bottom end of the limiting member 32 (because the elastic baffle 34 is small in size and is only used to limit the rotation center position of the limiting member 32, the test results do not consider the elastic baffle 34 on the limiting member 32 The elastic baffle 34 is used to limit the reaction force of the stopper 32, one end of the elastic baffle 34 is always in contact with one side wall of the limiter 32, and the other end thereof is elastically moved between the inner walls of the workbench 1 through the spring (the movement trajectory of the elastic baffle 34 is a circle), and the bottom end of the limiter 32 is always in contact with the bottom end of the vertical surface of the through hole by the restriction of the elastic baffle 34. In the initial state of the detection, one side wall of the limiter 32 is in contact with one vertical side wall of the through hole (that is, the side wall on the limiter 32 is in the vertical direction), and the side wall of the limiter 32 is tangent to the circumferential surface of the infant seat.

[0021] In addition, two supports 11 are installed on the top surface of the workbench 1 by screws, and a bidirectional screw 111 is rotatably arranged between the two supports 11 through a bearing, and a motor three is installed on the side wall of one of the supports 11. Motor three is a rotating motor, and motor three is connected to one end of the bidirectional screw 111 and drives it. Threaded holes matching the bidirectional screw 111 are provided on the limit strips 31 on both sides, and the bidirectional screw 111 passes through the two threaded holes and is respectively threadedly matched with them.

[0022] A groove 12 and a groove 2 13 are also provided on the top surface of the workbench 1, a guide rod 121 is inserted and fixed between the inner walls of the groove 12, the protrusion 311 slides between the inner walls of the groove 12, and the guide rod 121 passes through the protrusion 311 and slides in contact with it, at least three sleeves are fixed in the groove 2 13 by screws, the top of the sleeve is flush with the top surface of the workbench 1, a detection spring 131 is provided in each sleeve, and a pressure sensor (not shown in the figure) is fixedly embedded in the bottom end of the detection spring 131 between the inner walls of the groove 2 13, the pressure sensor is connected to the PLC controller 21 through an electrical signal, the bottom end of the detection spring 131 is fixed on the upper surface of the pressure sensor, so that when the detection spring 131 is subjected to a force, the pressure can be transmitted to the pressure sensor, wherein the limit member 32 moves above the groove 2 13, and the top of the detection spring 131 is in contact with one side wall of the limit member 32.

[0023] It should be further explained that the motor 3 is started by the PLC controller 21 to control the bidirectional screw 111 to rotate, so that the limit bars 1 31 on both sides are adjusted in a manner of moving toward or away from each other, and the limit bars 1 31 are adjusted to be tangent to the circumferential surface of the baby seat and then stop. During the movement and adjustment of the limit bars 1 31 , the slider 33 is synchronously slid and adjusted along the guide groove 1 321; During the detection process, when the baby seat falls to the side where the limit member 32 is located, the limit member 32 is always restricted by the elastic baffle 34 on one side of its bottom end and the movement of the slider 33 in the through hole 312, so that the bottom end of the limit member 32 rotates along the right-angle end of the through hole. At the same time, the elastic baffle 34 is gradually pressed into the workbench 1, and the detection spring 131 is also compressed downward under the movement of the limit member 32, so that the pressure sensor senses the force applied by the detection spring 131 at this time, and transmits the detection data to the PLC controller 21, and the internal calculation module of the PLC controller 21 directly calculates the average value of multiple detection springs 131.

[0024] like Figure 3 As shown, the force applying mechanism 4 includes a fixed shaft 41, a driving arm 42, an adjusting arm 43 and a driven arm 44; The top end of the fixed shaft 41 is installed in the middle of the bottom wall of the fixed frame 2 by means of a threaded connection, a vertically arranged through hole 2 411 is provided on the fixed shaft 41, and a connector 412 is installed on the bottom end of the fixed shaft 41 by means of a threaded connection, driving arms 42 are rotatably provided on both sides of the same position on the fixed shaft 41 by means of an axis connection, a through hole 3 421 is provided on the driving arms 42 along the length direction thereof, and a short shaft is fixedly inserted between the ends of the two driving arms 42, so that the driving arms 42 on both sides can be adjusted synchronously, wherein a motor 22 is installed on one side wall of the fixed frame 2 by means of bolts, the motor 22 is a rotating motor, an output shaft 221 is installed on the output end of the motor 22, and the other end of the output shaft 221 is synchronously connected to the axis connection position of one side driving arm 42, so that the motor 22 can control the movement adjustment of the two driving arms 42.

[0025] A driven arm 44 is rotatably provided on both sides of the connecting head 412 by means of an axial connection. The adjusting arm 43 is provided in an arc-shaped structure, and a connecting shaft 1 431 and a connecting shaft 2 432 are respectively passed through its two ends. The two ends of the connecting shaft 1 431 are fixed between the side walls of the driven arms 44 on both sides, and the connecting shaft 2 432 slides between the through holes 3 421 on the driving arms 42 on both sides, and the adjusting arm 43 is provided through the through hole 2 411.

[0026] During testing, the connector 412 is located above the middle position of the infant seat.

[0027] It should be further explained that the motor 22 is started by the PLC controller 21, so that it drives the driving arm 42 to rotate and adjust. As the driving arm 42 rotates, the adjusting arm 43 rotates synchronously under the action of the connecting shaft 432, and the connecting shaft 431 on the adjusting arm 43 drives the driven arm 44 to rotate and adjust to one side, thereby acting on the baby seat, so that the force on that side of the baby seat gradually increases until the baby seat tilts to that side.

[0028] like Figure 4 As shown, the clamping assembly 5 includes a clamping seat 51, a fastener 52, a movable block 53 and a contact sensor 54; The clamp seat 51 is arranged in a "U"-shaped structure. The clamp seat 51 is fixed on the baby seat and is opposite to the force direction of the driven arm 44. The fastener 52 passes through the clamp seat 51 and is fixed in contact with the side wall of the baby seat. The fastener 52 is a fastening screw. A guide groove 511 is opened on one side of the vertical side wall of the clamp seat 51. A contact sensor 54 is embedded at the end of the guide groove 511. The contact sensor 54 is connected to the PLC controller 21 through an electrical signal, and a movable block 53 is slidably arranged in the guide groove 511.

[0029] like Figure 5-6As shown, the resistance mechanism 6 includes a base 61, an adjustment frame 1 62, an adjustment frame 2 63, an L bracket 64, a tension spring 65, an adjustment gear 66, a synchronization shaft 67 and an adjustment wheel 68; The base 61 is fixed to the workbench 1 by bolts, and two limit strips 611 are installed on the top surface of the base 61 by screws, and an adjusting frame 62 and an adjusting frame 63 are slidably arranged between the side walls of the limit strips 611 on both sides, a sliding hole is provided on the top wall of the adjusting frame 62, and a guide strip 1 connected to the adjusting frame 62 as a whole is provided on the side walls on both sides of the sliding hole, and a sliding groove 1 is provided on the side walls on both sides of the bottom of the adjusting frame 62, and a tooth groove 1 is evenly provided on the adjusting frame 62 along its length direction, a connecting block 1 is welded on one side vertical side wall of the adjusting frame 62, and a fixed block 621 of a columnar structure is threadedly connected to the vertical side wall of the other side of the adjusting frame 62, and a pull rope is connected between the movable block 53 and the fixed block 621.

[0030] A slide groove 2 is provided on both side walls of the top of the adjusting frame 63, a guide bar 1 slides between the inner walls of the slide groove 2, and one end of the adjusting frame 63 slides between the inner walls of the slide hole, and a guide bar 2 connected to the adjusting frame 63 as a whole is provided on both side walls of the bottom of the adjusting frame 63, the guide bar 2 slides between the inner walls of the slide groove 1, and tooth grooves 2 are evenly provided on the adjusting frame 63 along its length direction, the tooth grooves 1 and the tooth grooves 2 are arranged opposite to each other, and a connecting block 2 is welded on one side of the vertical side walls of the adjusting frame 63, and a horizontally arranged tension spring 65 is installed between the connecting block 1 and the connecting block 2.

[0031] A side groove is also provided on one side wall of the base 61 along its length direction, and a screw is rotatably arranged in the side groove. A motor 4 (not shown in the figure) for driving the screw is installed on one end of the screw. The motor 4 is a rotary motor and is installed between the inner walls of the base 61. One end of the L bracket 64 slides between the inner walls of the side groove, and the screw passes through the interior of the L bracket 64 and cooperates with it through threaded transmission.

[0032] The other end of the L bracket 64 is rotatably provided with a synchronization shaft 67 between its inner walls, and a key shaft 661 is slidably provided between the inner walls of the synchronization shaft 67 facing the side of the adjustment frame 1 62 through a key connection. An adjusting gear 66 key-connected therewith is installed on one end of the key shaft 661, and the adjusting gear 66 is meshed between the tooth groove 1 and the tooth groove 2. A fixing plate is installed on the outer surface of the synchronization shaft 67 through screws, and a motor 2 69 is installed on the fixing plate through screws. The motor 2 69 is a linear motor, and an adjusting wheel 68 is connected to the output end of the motor 2 69. A wheel disc 662 is fixedly installed on the outer surface of the key shaft 661 (keys are installed on both sides of the wheel disc 662 on the key shaft 661 through screws), and a limiting groove is provided on the wheel disc 662 along its circumferential direction. The adjusting wheel 68 is arranged between the inner walls of the limiting groove and on one side thereof, and the adjusting wheel 68 can rotate between the inner walls of the limiting groove.

[0033] It should be further explained that, at the beginning of the detection, the pull rope is in a horizontal state, and the movable block 53 is located at the top of the second guide groove 511. As the force-applying mechanism 4 gradually applies a unidirectional force to the baby seat, the end of the baby seat that is close to the limiter 32 tilts in the force-applying direction, so that the clamping seat 51 on the baby seat moves synchronously, and drives the adjustment frame 1 62 connected thereto to make a linear motion toward the side close to the fixed frame 2 through the pull rope. As the adjustment frame 1 62 moves, the adjustment gear 66 rotates and controls the adjustment frame 2 63 to make a linear motion synchronously toward the side away from the adjustment frame 1 62, and at the same time drives the tension spring 65 to open, so that the force-applying mechanism 4 can apply a unidirectional force to the baby seat. When the child seat applies force, it can use the resistance mechanism 6 and the clamping assembly 5 to simulate the resistance that actually exists when a baby sits on the child seat. As the force-applying mechanism 4 continues to apply force, the clamping seat 51 continues to tilt to one side with the child seat, so that the movable block 53 continues to slide and adjust toward the exit side in the guide groove 511. When the movable block 53 slides out after passing the contact sensor 54, the contact sensor 54 is triggered, and the PLC controller 21 immediately stops the motor 1 22 to pause the test, and calculates the average value of the pressure values ​​transmitted to the PLC controller 21 through multiple pressure sensors, so as to represent the force required to make the seat tilt sideways under different resistance sizes.

[0034] The size of the adjustment resistance is controlled by changing the position of the adjustment gear 66 between the tooth groove 1 and the tooth groove 2. During adjustment, the motor 2 69 is started by the PLC controller 21 to drive the adjustment wheel 68 to move to the side close to the L bracket 64, thereby driving the key shaft 661 and the adjustment gear 66 to move to one side synchronously through the wheel plate 662. When the motor 2 69 is reset (i.e., the output distance is the shortest state), the adjustment gear 66 at this time leaves the tooth groove 1 and the tooth groove 2, but the teeth on the tooth groove 1 and the tooth groove 2 in the stopped state are still in a state corresponding to each other. Subsequently, the motor 4 is started by the PLC controller 21 to control the movement of the L bracket 64 under the action of the screw. Adjustment, and drive the adjusting gear 66 to move synchronously for adjustment. After moving to the appropriate position, stop motor 4, and then start motor 2 69, so that it drives the adjusting wheel 68 to move to the side away from the L bracket 64, thereby driving the key shaft 661 and the adjusting gear 66 to move synchronously. When the output distance of motor 2 69 reaches the farthest state, motor 2 69 stops automatically, and at this time the adjusting gear 66 moves again to the position where it meshes with tooth grooves 1 and 2, that is, by changing the meshing position of the adjusting gear 66 with tooth grooves 1 and 2, the degree to which the tension spring 65 is opened is adjusted, thereby controlling the change in the size of the resistance, so as to simulate the resistance generated when multiple babies of different weights sit on the baby seat.

[0035] Working principle: First, by placing the baby seat below the fixing frame 2 and in the middle of the positioning mechanism 3, so that the connecting head 412 is located just above the middle of the baby seat, the limiting strips 31 on both sides are moved and adjusted to sandwich the baby seat in the middle, and one end of the limiting member 32 contacts the vertical side wall of the through hole under the action of the elastic blocking piece 34, and the baby seat also contacts the vertical side wall of the limiting member 32 at this time, so that the limiting strip 31 and the limiting member 32 are both in a tangent state with the circumferential surface of the baby seat; Next, the adjusting gear 66 is moved away from between the adjusting frame 1 62 and the adjusting frame 2 63, and the L bracket 64 is controlled to move to the desired position, and then the adjusting gear 66 is moved back to between the adjusting frame 1 62 and the adjusting frame 2 63 to be meshed with the tooth groove 1 and the tooth groove 2, thereby changing the initial position of the adjusting gear 66 before the test begins, and the position of the L bracket 64 is fixed after the adjustment is completed; Then, by starting the motor 1 22, it controls the rotation adjustment of the driving arm 42, thereby driving the rotation adjustment of the driven arm 44 through the adjusting arm 43, and making the driven arm 44 act on the baby seat, so that the baby seat is subjected to a force inclined to one side. As the driven arm 44 continuously applies force to the baby seat, the clamp seat 51 moves to one side synchronously with the baby seat. In this process, the movable block 53 continuously moves along the guide groove 2 511 toward the outlet side. Under the action of the pull rope, the clamp seat 51 synchronously drives the adjusting frame 1 62 to move through the movable block 53. The adjustment gear 66 makes the adjustment frame 2 63 move in the opposite direction to the adjustment frame 1 62, thereby controlling the stretching length of the tension spring 65. This adjustment mode is used to simulate the resistance generated when a baby sits on the baby seat. When the movable block 53 slides out of the clamp seat 51, the contact sensor 54 is triggered. At this time, the test stops, and the PLC controller 21 calculates the average value of the data transmitted by multiple pressure sensors (ignoring the influence of the elastic baffle 34 on the resistance of the limiter 32), and obtains the force required to make the baby seat fall sideways under different resistance sizes.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, internal communication between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The above is a detailed introduction to the safety performance testing equipment and testing method of a baby seat provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A safety performance testing device for a baby seat, characterized in that: include: A workbench (1), wherein a fixing frame (2) is installed on the workbench (1), and a PLC controller (21) is installed on the fixing frame (2); A positioning mechanism (3), the positioning mechanism (3) comprising a limiting strip (31) and a limiting member (32), two limiting strips (31) are provided and relatively move on the workbench (1) along the width direction of the workbench (1), the limiting member (32) penetrates and is rotatably provided between the limiting strips (31) on both sides, a plurality of detection springs (131) are provided on one side of the limiting member (32) on the workbench (1), a pressure sensor is provided at the bottom end of each detection spring (131), and a baby seat to be detected is placed between the limiting strip (31) and the limiting member (32); A force applying mechanism (4), the force applying mechanism (4) being arranged below the fixing frame (2), and a driven arm (44) being rotatably arranged at the end of the force applying mechanism (4), the driven arm (44) acting on the infant seat; A clamping assembly (5), the clamping assembly (5) being fixed on the infant seat and arranged opposite to the force application direction of the driven arm (44), the clamping assembly (5) being provided with a slidingly adjustable movable block (53), and a contact sensor (54) being further provided on the movement path of the movable block (53); The resistance mechanism (6) comprises a base (61), an adjustment frame 1 (62), an adjustment frame 2 (63) and a tension spring (65), wherein the base (61) is mounted on a workbench (1), the adjustment frame 1 (62) and the adjustment frame 2 (63) move relative to each other along the length direction of the base (61), the tension spring (65) is mounted between opposite side walls of the adjustment frame 1 (62) and the adjustment frame 2 (63), and the adjustment frame 1 (62) is further provided with a fixed block (621) connected to the movable block (53) via a pull rope, and an adjustment gear (66) capable of adjusting the position is further provided between the adjustment frame 1 (62) and the adjustment frame 2 (63).

2. A safety performance testing device for an infant seat according to claim 1, characterized in that: The workbench (1) is provided with two supports (11), a bidirectional screw (111) is rotatably provided between the supports (11) on both sides, and the workbench (1) is also provided with a first groove (12) and a second groove (13), a detection spring (131) is arranged in the second groove (13), and a sleeve is also arranged outside the detection spring (131), the top surface of the sleeve is flush with the top surface of the workbench (1), a pressure sensor is installed on the bottom wall of the second groove (13), and the pressure sensor is connected to the PLC controller (21) through an electrical signal.

3. The safety performance testing device for an infant seat according to claim 2, characterized in that: A protrusion (311) is provided at the bottom of one end of the limit strip (31), the protrusion (311) is slidably arranged along the groove (12), and a guide rod (121) is passed through the protrusion (311) and is in sliding contact with the protrusion, and the guide rod (121) is fixed between the inner walls of the groove (12), and the bidirectional screw (111) passes through the other ends of the limit strips (31) on both sides and is threadedly matched therewith, and an arc portion is also provided on the limit strip (31), and a through hole with a longitudinal section of a right-angle fan is opened below the arc portion; The longitudinal section of the limiting member (32) is fan-shaped. The limiting member (32) is arranged between the through holes on both sides, and the bottom end of the limiting member (32) is always in contact with the right-angle end of the through hole. The bottom end of the limiting member (32) is elastically provided with an elastic baffle (34) of an arc structure between the inner walls of the workbench (1). One end of the elastic baffle (34) is always in contact with one side wall of the limiting member (32). A slider (33) is also slidably provided on the limiting member (32), and the other end of the slider (33) is rotatably provided with the limiting member (32) between the inner walls of the limiting strip (31).

4. The safety performance testing device for an infant seat according to claim 3, characterized in that: The force applying mechanism (4) further comprises a fixed shaft (41), a driving arm (42) and an adjusting arm (43); The fixed shaft (41) is installed in the middle of the bottom wall of the fixed frame (2), and a connecting head (412) is also provided at the bottom end of the fixed shaft (41). One end of the driven arm (44) is rotatably connected to the connecting head (412) by means of an axial connection. The driving arms (42) are rotatably provided on both sides of the fixed shaft (41) by means of an axial connection. The driving arms (42) on both sides are rotatably adjusted synchronously. A motor (22) is also connected to one side of one of the driving arms (42). The motor (22) is a rotating motor and is installed on the side wall of the fixed frame (2). The adjusting arm (43) is arranged in an arc-shaped structure, and a connecting shaft 1 (431) and a connecting shaft 2 (432) are respectively passed through the two ends of the adjusting arm. The connecting shaft 1 (431) is installed between the driven arms (44) on both sides, and the connecting shaft 2 (432) slides between the driving arms (42) on both sides. The adjusting arm (43) is arranged to pass through the fixed shaft (41).

5. The safety performance testing device for an infant seat according to claim 4, characterized in that: The clamping assembly (5) further comprises a clamping seat (51) and a fastener (52); The clamp seat (51) is in a "U"-shaped structure. The clamp seat (51) is arranged on the baby seat and is connected and fixed thereto via a fastener (52). The fastener (52) is a set screw. A second guide groove (511) is provided on one vertical side wall of the clamp seat (51). The movable block (53) slides between the inner walls of the second guide groove (511). The contact sensor (54) is embedded between the inner walls at the end of the second guide groove (511). The contact sensor (54) is connected to the PLC controller (21) via an electrical signal.

6. The safety performance testing device for an infant seat according to claim 5, characterized in that: The top of the adjusting frame 1 (62) is provided with a sliding hole, one end of the adjusting frame 2 (63) slides between the inner walls of the sliding hole, a guide bar 1 connected to the adjusting frame 1 (62) is provided on both side walls of the sliding hole, and a sliding groove 1 is provided on both side walls of the bottom of the adjusting frame 1 (62), a guide bar 2 connected to the adjusting frame 1 (62) is provided on both side walls of the bottom of the adjusting frame 2 (63), and a sliding groove 2 is provided on both side walls of the top of the adjusting frame 2 (63), the guide bar 1 slides along the inner wall of the sliding groove 2 for adjustment, and the guide bar 2 slides along the inner wall of the sliding groove 1 for adjustment; The first adjusting frame (62) is provided with a tooth groove one along its length direction, and the second adjusting frame (63) is provided with a tooth groove two along its length direction. The tooth groove one and the tooth groove two are arranged opposite to each other and correspond to each other. The adjusting gear (66) is meshed and arranged between the tooth groove one and the tooth groove two. The first adjusting frame (62) is also provided with a connecting block one, and the second adjusting frame (63) is also provided with a connecting block two. The tension spring (65) is installed between the connecting block one and the connecting block two. Among them, two limiting strips (611) are also installed on the base (61) along its length direction, and the bottom ends of the adjustment frame (62) and the adjustment frame (63) slide between the side walls of the two limiting strips (611).

7. The safety performance testing device for an infant seat according to claim 6, characterized in that: The resistance mechanism (6) further comprises an L bracket (64), a key shaft (661), a synchronization shaft (67) and an adjustment wheel (68); A side groove is provided on one side wall of the base (61) along its length direction, one end of the L bracket (64) slides between the inner walls of the side groove, and a screw rod threadedly matched with the end of the L bracket (64) located in the side groove penetrates through the end of the L bracket (64), and the screw rod is rotatably arranged between the inner walls of the side groove; One end of the synchronization shaft (67) is rotatably arranged between the inner wall of the other end of the L bracket (64); a wheel disc (662) is sleeved on the key shaft (661) and fixedly connected thereto; keys connected to the key shaft (661) are arranged on both sides of the wheel disc (662) on the key shaft (661); the key shaft (661) and the adjustment gear (66) are connected by a key; the key shaft (661) and the synchronization shaft (67) can be slidably adjusted by the key connection and can be synchronously rotated by the key connection; A second motor (69) is mounted on the outer surface of the synchronous shaft (67), the second motor (69) being a linear motor, the adjusting wheel (68) being mounted on the output end of the linear motor, the wheel disc (662) being provided with a limiting groove along its circumferential surface, the adjusting wheel (68) being arranged between the inner walls of the limiting groove and on one side thereof.

8. The method for detecting the safety performance of an infant seat according to claim 7, characterized in that: The following steps are involved: S1. First, the baby seat is placed below the fixing frame (2) and in the middle of the positioning mechanism (3), and the baby seat is positioned by the limiting strip (31) and the limiting member (32), so that the limiting strip (31) and the limiting member (32) are both in a tangent state to the circumferential surface of the baby seat; S2, then, control the moving L bracket (64) so ​​that it drives the adjusting gear (66) to adjust the initial meshing position between the adjusting bracket 1 (62) and the adjusting bracket 2 (63), and stop after adjusting to the desired position and fix the position of the L bracket (64); S3. Then, by starting the motor 1 (22), the motor 1 controls the rotation adjustment of the driving arm (42), thereby driving the rotation adjustment of the driven arm (44) through the adjusting arm (43), and causing the driven arm (44) to act on the baby seat, so that the baby seat is subjected to a force inclined to one side. As the driven arm (44) continuously applies force to the baby seat, the clamp seat (51) moves synchronously with the baby seat to one side. Under the action of the pull rope, the clamp seat (51) drives the adjusting frame 1 (62) to move synchronously, and then the adjusting frame 2 (63) moves synchronously with the adjusting frame 1 (62) in the opposite direction, thereby simulating the resistance generated when the baby sits on the baby seat. When the movable block (53) slides out of the clamp seat (51), the contact sensor (54) is triggered. At this time, the test stops, and the PLC controller (21) calculates the average value of the data transmitted by the multiple pressure sensors to obtain the force required to make the baby seat fall sideways under different resistances.

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