Multi-point safety buckle

Abstract

This utility model relates to the technical field of safety buckles, providing a multi-point safety buckle, including a main buckle base and left and right buckles detachably installed on both sides of the main buckle base. The main buckle base has symmetrically arranged fastening grooves, upper anti-rotation grooves, and lower anti-rotation grooves on both sides, and a button groove on the front. The left and right buckles each have a fastening elastic piece, an upper anti-rotation post, and a lower anti-rotation post, which can be adapted to be inserted into the fastening groove, upper anti-rotation groove, and lower anti-rotation groove, respectively. A button is slidably embedded in the button groove, and the button has two symmetrical top plates protruding from it. The fastening elastic piece has a fastening cavity, a spring-loaded inclined surface, and an elastic arm. The inside of the fastening groove has a fastening protrusion. When the left and right buckles are inserted into the sides of the main buckle base, the fastening protrusion engages with the fastening cavity for locking. This utility model can adjust and control safety indicators such as tensile strength, compressive strength, and torsional resistance separately.

Description

Technical Field

[0001] This utility model relates to the technical field of safety buckles, and more specifically, to a safety buckle that is used with a seat belt. Background Technology

[0002] Seat belts are currently used in vehicle seats, baby carriers, and child seats to protect passengers or children. Child seats are seats specifically designed for children, and can be categorized into car seats, strollers, and high chairs, among others, depending on their purpose. To enhance the safety performance of child seats, they are typically equipped with seat belts and safety buckles that restrict child movement. The most common safety buckles on the market are usually two-point or three-point buckles, which connect to two or three seat belts to achieve a secure hold. Currently, a five-point safety buckle with even higher safety performance has emerged.

[0003] For example, the utility model patent with publication number CN201869902U discloses a five-point safety buckle, including a safety buckle body and left and right buckles. The lower side of the safety buckle body is provided with a main strap position for connecting the seat belt. The left and right sides of the safety buckle body are respectively provided with left and right buckle positions for locking the left and right buckles. The side of the safety buckle body is provided with elastic buttons that can force the left and right buckles to disengage from the left and right buckle positions. The two sides of the left buckle are respectively provided with the first and second left strap positions for connecting the seat belt, and the two sides of the right buckle are respectively provided with the first and second right strap positions for connecting the seat belt. The aforementioned solution achieves five-point fixation through the main seatbelt position, the first and second left seatbelt positions, and the first and second right seatbelt positions. Since each of the left and right buckles connects two seatbelts, a closed loop is formed between the left and right buckles and the seat. In actual use, the child's arms need to be passed through the closed loop at the corresponding left and right buckles. Similarly, when unbuckling the seatbelt, the child's arms also need to be removed from the closed loop. Therefore, if the child does not cooperate during the fastening / unfastening of the seatbelt, it will cause inconvenience in operation. Utility model patent with patent publication number CN 207744771 U discloses a safety buckle for use with seat belts. The key technical features include a main buckle base and left and right buckles that are detachably installed on both sides of the main buckle base. Both the left and right buckles have a first and a second side fastening position for connecting the seat belt. The left and right buckles are mainly composed of an upper buckle plate with a first side fastening position and a lower buckle plate that is snapped and fixed to the main buckle base and has a second side fastening position. There is a plug-in structure between the upper and lower buckle plates for detachably installing the upper buckle plate onto the lower buckle plate. This allows for the quick fixing or separation of any two adjacent seat belts, thus facilitating the fastening / unfastening of seat belts for children under any emotional influence.

[0004] Both of the above-mentioned safety buckles achieve multi-point connection from a connection perspective, but the connection between their left and right buckles and the main buckle body has structural defects in terms of strengthening safety-related indicators such as tensile strength, compressive strength, and torsional strength. They cannot achieve adaptive adjustment of the aforementioned indicators and cannot fully ensure that the aforementioned safety indicators of the product meet different safety specifications. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-point safety buckle that can adjust and control safety indicators such as tensile strength, compressive strength, and torsional strength separately, so as to ensure that the aforementioned safety indicators of the products manufactured by this invention meet different safety specifications.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a multi-point safety buckle, including a main buckle seat and left and right buckles detachably installed on both sides of the main buckle seat. The main buckle seat has symmetrically arranged fastening grooves, upper anti-rotation grooves, and lower anti-rotation grooves on both sides. The upper and lower anti-rotation grooves are respectively located on both sides of the fastening groove. The front of the main buckle seat has a button groove. The left and right buckles are respectively provided with a fastening elastic piece, an upper anti-rotation post, and a lower anti-rotation post. The fastening elastic piece can be adapted to be inserted into the fastening groove, and the upper and lower anti-rotation posts can be adapted to be inserted into the upper and lower anti-rotation grooves, respectively. The buckle can slide within the button groove. An embedded button is provided, and two symmetrical top plates protrude from the side of the button facing the snap-fit ​​elastic piece. The snap-fit ​​elastic piece has a snap-fit ​​cavity in the middle, and an ejector ramp is provided inside the snap-fit ​​cavity. An elastic arm is provided on the upper and lower sides of the snap-fit ​​cavity. The snap-fit ​​groove has a snap-fit ​​protrusion that matches the snap-fit ​​cavity. When the left and right snaps are inserted into the sides of the main buckle, the snap-fit ​​protrusions are locked into the snap-fit ​​cavity. The upper and lower anti-rotation pins are inserted into the upper and lower anti-rotation grooves respectively to limit the movement and prevent the left and right snaps from deflecting and twisting. When unlocking, pressing the button causes the top plate to press against the ejector ramp, which works on the elastic arm to separate the snap-fit ​​cavity and the snap-fit ​​protrusion. At the same time, the left and right snaps are ejected from the main buckle, achieving quick unlocking.

[0007] When this utility model is applied to a three-point buckle, the main buckle seat is provided with a main buckle hole for connecting the seat belt, and the left buckle and the right buckle are respectively provided with a lateral first fastening hole for connecting the seat belt.

[0008] When this utility model is applied to a five-point fastener, a loading rib is provided on the upper part of the left and right buckles respectively, and two fastening plates are provided to cooperate with the loading ribs for fastening. One end of the fastening plate is provided with a loading groove to cooperate with the loading rib for fastening, and the other end is provided with a lateral second fastening hole to connect with the seat belt. Through this scheme, a five-point fastening connection of the main buckle hole and two lateral fastening holes on each side is realized.

[0009] To better achieve the cooperation between the main buckle and the button, a pressing slide groove is provided on the side wall of the button groove, a spring insert is provided in the center of the button groove, a spring is nested on the spring insert, and a cantilever hook that cooperates with the pressing slide groove is provided on the side wall of the button. The cantilever hook is embedded in the pressing slide groove, and the spring presses against the bottom of the button groove and the top of the button. Adjusting the spring prestress can also prevent the button from being accidentally pressed by an infant, causing the buckle to be unlocked.

[0010] Because the engagement between the ejection ramp and the top plate is directional, and the directions in which the left and right buckles are inserted into the main buckle seat are also fixed, a directional rib is provided on the side of the lower anti-rotation groove; correspondingly, a directional groove adapted to the directional rib is provided on the side of the lower anti-rotation column. In some embodiments where the requirements for ejection sensitivity and ejection force are not high, the ejection ramps on both sides of the buckling elastic sheet can be symmetrically arranged, and the left and right buckles can be the same parts installed on opposite sides. In this case, the directional rib and directional groove do not need to be provided.

[0011] To ensure that the left and right buckles smoothly engage with the main buckle seat, an engagement guide slope is provided on the outer side of the engagement protrusion on the inner wall of the engagement groove. When the engagement elastic piece is inserted into the engagement groove, the ejection slope and the engagement guide slope guide each other to achieve fast and smooth engagement. When the left and right buckles are ejected from the main buckle seat, the engagement guide slope can reduce friction with the ejection slope and reduce resistance.

[0012] This invention has the following advantages: The fastener's tensile strength can be adjusted by adjusting the relative engagement area of ​​the engagement protrusion and engagement cavity; the button unlocking pressure can be adjusted by adjusting the cross-section of the elastic arm; the anti-torsion index of the fastener can be adjusted by adjusting the fit clearance between the upper and lower anti-rotation posts and the upper and lower anti-rotation grooves; and the impact force of the ejection ramp can be adjusted by adjusting the curvature of the ejection ramp. All of the aforementioned adjustments can be performed relatively independently. For the production of safety products with different combinations of index values, only the inserts of the corresponding parts need to be replaced, significantly reducing manufacturing costs while meeting different safety regulations. Attached Figure Description

[0013] Figure 1 is a three-dimensional schematic diagram of the disassembled state of this utility model; Figure 2 is a side view of the main buckle of this utility model; Figure 3 is a schematic diagram of the upper structure of the button slot of this utility model; Figure 4 is a schematic diagram of the lower part of the button slot of this utility model; Figure 5 is a schematic diagram of the upper structure of the left (right) buckle of this utility model; Figure 6 is a schematic diagram of the lower structure of the left (right) buckle of this utility model; Figure 7 is a schematic diagram of the elastic button structure of this utility model; Figure 8 is a front view of the three-point fastening embodiment of this utility model; Figure 9 is a schematic diagram of the AA cross section in Figure 8; Figure 10 is a schematic diagram of the BB cross section in Figure 8; Figure 11 is a three-dimensional schematic diagram of the five-point fastening embodiment of this utility model.

[0014] The labels in the diagram indicate: 1-Main buckle seat; 11-Main strap hole; 12-Snapping groove; 121-Snapping protrusion; 1211-Snapping guide slope; 13-Upper anti-rotation groove; 14-Lower anti-rotation groove; 141-Directional rib; 15-Button groove; 151-Pressing slide groove; 152-Spring insert; 1520-Spring; 21-Left buckle; 22-Right buckle; 23-Snapping elastic piece; 231-Snapping cavity; 232-Ejection ramp; 233-Elastic arm; 24-Upper anti-rotation post; 25-Lower anti-rotation post; 251-Orienting groove; 26-Lateral first tether hole; 27-Loading rib; 3-Button, 31-Cantilever hook, 32-Top plate; 4-Snap-fit ​​plate, 41-Loading groove, 42-Secondary tie hole. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] As shown in Figure 1-10: This utility model provides a multi-point safety buckle, including a main buckle base 1 and left buckles 21 and right buckles 22 detachably installed on both sides of the main buckle base 1. The main buckle base 1 has symmetrically arranged fastening grooves 12, upper anti-rotation grooves 13 and lower anti-rotation grooves 14 on both sides. The upper anti-rotation grooves 13 and 14 are respectively located on both sides of the fastening groove 12. The main buckle base 1 has a button groove 15 on its front side. The left buckles 21 and 22 are respectively provided with a fastening elastic piece 23, an upper anti-rotation post 24, and a lower anti-rotation post 25. The fastening elastic piece 23 can be adapted to be inserted into the fastening groove 12, and the upper anti-rotation post 24 and lower anti-rotation post 25 can be adapted to be inserted into the upper anti-rotation groove 13 and lower anti-rotation groove 14, respectively. A button 3 is slidably embedded in the button groove 15, with the button 3 facing the fastening elastic piece 23. Two symmetrical top plates 32 protrude from one side; the fastening elastic piece 23 has a fastening cavity 231 in the middle, and an ejection ramp 232 is provided inside the fastening cavity 231. An elastic arm 233 is provided on the upper and lower sides of the fastening cavity 231. The fastening groove 12 has a fastening protrusion 121 that matches the fastening cavity 231 inside. When the left buckle 21 and the right buckle 22 are inserted into the sides of the main buckle seat 1, the fastening protrusion 121 is locked into the fastening cavity 231. The upper anti-rotation post 24 and the lower anti-rotation post 25 are respectively inserted into the upper anti-rotation groove 13 and the lower anti-rotation groove 14 for limiting and preventing the left buckle 21 and the right buckle 22 from deflecting and twisting. When unlocking, pressing the button 3 causes the top plate 32 to press against the ejection ramp 232, which works on the elastic arm 233 to open the fastening cavity 231. Separate from the latching protrusion 121, and simultaneously eject the left latch 21 and right latch 22 from the main latch seat 1 to achieve quick unlocking.

[0017] As shown in Figure 8, when this utility model is applied to a three-point buckle, the main buckle seat 1 is provided with a main buckle hole 11 for connecting the seat belt, and the left buckle 21 and the right buckle 22 are respectively provided with a lateral first fastening hole 26 for connecting the seat belt.

[0018] As shown in Figure 11, when this utility model is applied to a five-point fastener, a loading rib 27 is provided on the upper part of the left buckle 21 and the right buckle 22 respectively, and two fastening plates 4 are provided to cooperate and fasten with the loading rib 27 respectively. One end of the fastening plate 4 is provided with a loading groove 41 to cooperate and fasten with the loading rib 27, and the other end is provided with a lateral second strap hole 42 to connect with the seat belt. Through this scheme, a five-point fastening connection is achieved between the main buckle hole 11 and two lateral strap holes (26, 42) on each side.

[0019] As shown in Figures 1-4 and 7-9, in order to better achieve the cooperation between the main buckle 1 and the button 3, a pressing slide groove 151 is provided on the side wall of the button groove 15, a spring insert 152 is provided in the center of the button groove 15, and a spring 1520 is nested on the spring insert 152. A cantilever hook 31 that cooperates with the pressing slide groove 151 is provided on the side wall of the button 3. The cantilever hook 31 is embedded in the pressing slide groove 151. The spring 1520 presses against the bottom of the button groove 15 and the top of the button 3. Adjusting the prestress of the spring 1520 can also prevent the button 3 from being accidentally pressed by an infant, causing the buckle to be unlocked.

[0020] As shown in Figures 1-6 and 10, since the engagement between the ejection ramp 232 and the top plate 32 has a certain directionality, the insertion directions of the left buckle 21 and the right buckle 22 into the main buckle seat 1 are also fixed. Therefore, a directional rib 141 is provided on the side of the lower anti-rotation groove 14; correspondingly, a directional groove 251 adapted to the directional rib 141 is provided on the side of the lower anti-rotation column 251. In some embodiments where the requirements for ejection sensitivity and ejection force are not high, the ejection ramps 232 on both sides of the fastening elastic piece 23 can be symmetrically arranged, and the left buckle 21 and the right buckle 22 can be the same part installed on opposite sides. In this case, the directional rib 141 and the directional groove 251 do not need to be provided.

[0021] As shown in Figures 1-6 and 9, in order to smoothly engage the left buckle 21 and the right buckle 22 into the main buckle seat 1, an engagement guide slope 1211 is provided on the outer side of the engagement protrusion 121 on the inner wall of the engagement groove 12. When the engagement elastic piece 23 is inserted into the engagement groove 12, the ejection slope 232 and the engagement guide slope 1211 guide each other to achieve fast and smooth engagement. When the left buckle 21 and the right buckle 22 are ejected from the main buckle seat 1, the engagement guide slope 1211 can reduce the friction with the ejection slope 232 and reduce the resistance.

[0022] Through the above solution, this utility model has the following beneficial effects: This utility model can adjust the fastener tension index value by adjusting the relative fastening area of ​​the fastening protrusion 121 and the fastening cavity 231; it can adjust the unlocking bearing pressure of the button 3 by adjusting the cross-section of the elastic arm 233; it can adjust the anti-torsion index value of the fastener by adjusting the mating clearance between the upper anti-rotation post 24, the lower anti-rotation post 25 and the upper anti-rotation groove 13, the lower anti-rotation groove 14; and it can adjust the impact force of the spring by adjusting the curvature of the ejection slope 232. The aforementioned adjustments can all be performed relatively independently. For the production of safety products with different index value combinations, only the inserts of the corresponding parts need to be replaced. Under the condition of meeting different safety regulations, the manufacturing cost is greatly reduced.

[0023] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, and all such modifications fall within the scope of the claims of the present utility model and should be protected by patent law.

Claims

1. A multi-point safety buckle, characterized in that, The device includes a main buckle base and left and right buckles detachably mounted on either side of the main buckle base. The main buckle base has symmetrically arranged engagement grooves, upper anti-rotation grooves, and lower anti-rotation grooves on both sides. The upper and lower anti-rotation grooves are respectively located on either side of the engagement groove. The front of the main buckle base has a button groove. The left and right buckles each have an engagement elastic piece, an upper anti-rotation post, and a lower anti-rotation post. The engagement elastic piece can be adapted to insert into the engagement groove, and the upper and lower anti-rotation posts can be adapted to insert into the upper and lower anti-rotation grooves, respectively. The buckles can slide within the button groove. A button is embedded in the base, and two symmetrical top plates protrude from the side of the button facing the snap-fit ​​elastic sheet. The snap-fit ​​elastic sheet has a snap-fit ​​cavity in the middle, and an ejection ramp is provided inside the snap-fit ​​cavity. An elastic arm is provided on the upper and lower sides of the snap-fit ​​cavity. The snap-fit ​​groove has a snap-fit ​​protrusion that matches the snap-fit ​​cavity. When the left and right snap-fit ​​are inserted into the main buckle, the snap-fit ​​protrusions are locked into the snap-fit ​​cavity. The upper and lower anti-rotation pins are inserted into the upper and lower anti-rotation grooves respectively to limit the movement and prevent the left and right snap-fit ​​from deflecting and twisting.

2. A multi-point safety buckle according to claim 1, wherein, The main buckle seat is provided with a main buckle hole for connecting the seat belt, and the left buckle and the right buckle are respectively provided with a lateral first fastening hole for connecting the seat belt.

3. A multi-point safety buckle according to claim 1, wherein, The upper part of the left buckle and the right buckle is provided with a loading rib, and two fastening plates are provided to cooperate with the loading rib to fasten. One end of the fastening plate is provided with a loading groove to cooperate with the loading rib to fasten, and the other end is provided with a lateral second fastening hole to connect with the seat belt.

4. A multi-point safety buckle according to claim 1, wherein, The button slot has a pressing groove on its side wall, a spring insert in the center of the button slot, a spring nested in the spring insert, and a cantilever hook that cooperates with the pressing groove on the side wall of the button. The cantilever hook is embedded in the pressing groove, and the spring presses against the bottom of the button slot and the top of the button.

5. A multi-point safety buckle according to claim 1, wherein, A directional rib is provided on the side of the lower anti-rotation groove; correspondingly, a directional groove adapted to the directional rib is provided on the side of the lower anti-rotation column.

6. A multi-point safety buckle according to claim 1, wherein, The outer side of the fastening protrusion on the inner wall of the fastening groove is provided with a fastening guide slope. When the fastening elastic piece is inserted into the fastening groove, the ejection slope and the fastening guide slope guide each other to achieve fastening quickly and smoothly.

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