A connection structure in compliance with a lever state drop test

Abstract

The utility model discloses a kind of connecting structure in compliance with lever state drop test, comprising: at least three inserts, each the end of the insert is set as inverted cone;At least two bosses, the boss is located at the inverted cone end of insert, inverted cone groove is formed between adjacent two bosses, the connecting structure in compliance with lever state drop test, by the end of insert is set as inverted cone, and inverted cone groove is formed between boss, when frame body wraps inverted cone end of insert and boss, it will increase the connecting area and connecting point of frame body and insert, boss is embedded in frame body, form the connecting mode similar to mortise and tenon structure, make the combination of both more closely and firmly, the design of this multiple connecting point and larger connecting area can more evenly disperse external force, when being subjected to drop impact, force can be conducted and dispersed through multiple paths, thereby reducing the stress of single point at connecting place, reduce the risk of fracture at the connecting place of insert and frame body.

Description

Technical Field

[0001] This utility model relates to the field of connection structure technology, and in particular to a connection structure that meets the requirements of a drop test under lever conditions. Background Technology

[0002] There is a type of stent such as Figure 1 and Figure 5 As shown, it includes a frame 2, legs 3 and insert 1, wherein the insert 1 is injection molded, and then the insert 1 is placed on a blow molding mold to blow mold an integrated frame 2 and insert 1 structure, and finally the legs 3 and insert 1 are installed and fixed.

[0003] The current insert 1 structure is as follows: Figure 5 As shown, the whole is cylindrical, and its connection surface with the frame 2 is flat. The connection between the flat insert 1 and the blow-molded frame 2 mainly relies on the contact between the flat surfaces. The connection area is relatively small, and the connection point is relatively simple. When it falls, the external force is concentrated at the flat connection point. Figure 1 At point A in the diagram, stress concentration is likely to occur, causing the connection to bear greater tensile or shear forces, making it more prone to breakage and failing to meet the drop test standards for the product. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a connection structure that meets the drop test under leverage conditions, so as to solve the problem that the connection area between the existing insert and the frame is relatively small and the connection point is relatively simple, which makes it easy to break during a drop.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a connection structure that conforms to a drop test under lever conditions, comprising:

[0006] At least three inserts, each of which has one end shaped like an inverted cone;

[0007] At least two protrusions are provided at one end of the inverted conical shape of the insert, and an inverted conical groove is formed between two adjacent protrusions. The diameter of the groove is smallest at the end of the inverted conical groove furthest from the insert.

[0008] The frame is located at one end of the inverted conical shape of the insert and covers the protrusion and the inverted conical end of the insert;

[0009] At least three legs, each of which is detachably and securely connected to an insert, and the legs provide stable support for the frame.

[0010] Preferably, the two protrusions that are furthest apart are provided with side grooves on opposite sides.

[0011] Preferably, the inner wall of the side groove is designed with rounded corners.

[0012] Preferably, the insert has a bottom groove at the end away from the protrusion, and the side of the insert with the protrusion has several vent holes communicating with the bottom groove.

[0013] Preferably, the diameter of the vent hole is 0.5mm-1.5mm.

[0014] Preferably, the bump and the insert are integrally molded using an injection molding process.

[0015] Preferably, one end of the support leg has a through hole, the inner wall of the through hole has an internal thread, the outer surface of the insert has an external thread that matches the internal thread, and the support leg is sleeved on the outer surface of the insert.

[0016] Preferably, the frame is in the shape of a long rod.

[0017] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0018] This invention features an inverted conical shape at one end of each insert, with inverted conical grooves formed between the protrusions. When the frame encloses the inverted conical end of the insert and the protrusions, it increases the connection area and connection points between the frame and the insert. The protrusions are embedded in the frame, forming a mortise and tenon joint-like connection, making the combination of the two tighter and more stable. This design with multiple connection points and a larger connection area can more evenly distribute external forces. When subjected to a drop impact, the force can be transmitted and dispersed through multiple paths, thereby reducing the stress on a single point at the connection and lowering the risk of breakage at the connection between the insert and the frame. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 Explosion structure diagram;

[0021] Figure 3 This is a schematic diagram of the insert and protrusion structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the insert of this utility model;

[0023] Figure 5 A schematic diagram of an existing insert structure;

[0024] Among them: 1. Insert; 11. Bottom groove; 12. Vent hole; 2. Frame; 3. Support leg; 4. Protrusion; 41. Inverted conical groove; 42. Side groove. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this utility model.

[0026] like Figures 1-4 As shown, this utility model provides a connection structure that meets the requirements of a drop test under leverage conditions, including at least three inserts 1, at least two protrusions 4, a frame 2 (the frame 2 is in the shape of a long rod) and at least three support legs 3;

[0027] Each insert 1 has one end set as an inverted cone;

[0028] The protrusion 4 is located at one end of the inverted cone shape of the insert 1, and an inverted cone groove 41 is formed between two adjacent protrusions 4. The diameter of the groove 41 is smallest at the end furthest from the insert 1.

[0029] The frame 2 is located at one end of the inverted cone shape of the insert 1 and covers the protrusion 4 and the inverted cone shape of the insert 1;

[0030] Each leg 3 is detachably and fixedly connected to an insert 1, and the leg 3 provides stable support for the frame 2.

[0031] This application uses four inserts 1 as an example, so that the four legs 3 support the frame 2 (e.g. Figure 1 (as shown);

[0032] By setting one end of each insert 1 to an inverted cone shape and forming an inverted cone groove 41 between the protrusions 4, when the frame 2 wraps around the inverted cone end of the insert 1 and the protrusions 4, the connection area and connection points between the frame 2 and the insert 1 are increased. The protrusions 4 are embedded in the frame 2, forming a connection method similar to a mortise and tenon structure, making the combination of the two more compact and stable. This design with multiple connection points and a larger connection area can distribute external forces more evenly. When subjected to a drop impact, the force can be transmitted and dispersed through multiple paths, thereby reducing the force on a single point at the connection and reducing the risk of breakage at the connection between the insert 1 and the frame 2.

[0033] When this product is intended for children (such as a children's lamp stand), this design allows it to meet the drop test standards for children's products in various countries around the world.

[0034] like Figure 4 As shown, the two protrusions 4 that are furthest apart are each provided with a side groove 42 on the opposite side;

[0035] Furthermore, by creating side grooves 42 on the sidewalls of the protrusions 4, the contact area and roughness between the protrusions 4 and the frame 2 are further increased. During blow molding, the molten plastic can flow into the side grooves 42. After cooling and solidification, a protruding structure matching the shape of the side grooves 42 is formed. These protrusions and the side grooves 42 interlock with each other, similar to the meshing of gear teeth. This mechanical interlocking can effectively prevent relative sliding and separation between the frame 2 and the insert 1, greatly enhancing the mechanical connection between the two. When subjected to external forces, especially in the case of impacts such as drops, stress will concentrate at the connection between the frame 2 and the insert 1. The design of the side grooves 42 can disperse the stress along the contour of the side grooves 42, avoiding stress concentration at a certain point or area. Because the side grooves 42 change the geometry of the connection, the stress distribution is more uniform, reducing the situation of excessive local stress. Thus, the connection between the two can withstand greater external forces without easily breaking.

[0036] like Figure 4 As shown, the inner wall of the side groove 42 is designed with rounded corners. Compared with the side grooves 42 with flat corners and right angles, it effectively avoids local stress concentration and reduces the possibility of product breakage or cracking when subjected to stress or temperature changes. The rounded corner design disperses stress through a smooth transition, which significantly improves the fatigue resistance and durability of the structure. At the same time, the rounded corner design reduces the flow resistance of the plastic melt at the rounded corners during the blow molding process, which can avoid the stagnation or insufficient filling caused by right angles and flat corners, and reduce defects such as shrinkage marks and air pockets. The rounded corner structure reduces abrupt changes in local thickness and reduces the internal stress caused by uneven cooling, thereby reducing warping deformation and ensuring dimensional accuracy.

[0037] like Figure 4 As shown, the insert 1 has a bottom groove 11 at the end away from the protrusion 4. The side of the insert 1 with the protrusion 4 has several vent holes 12 that communicate with the bottom groove 11. By setting the vent holes 12, the vent holes play a role in venting when the insert 1 is put in and blow-molded to cover the insert 1 during the production process, ensuring a good molding and bonding effect between the insert 1 and the frame 2, thereby ensuring the performance and strength of the entire product.

[0038] like Figure 4 As shown, the diameter of the vent hole 12 is 0.5mm-1.5mm. When the diameter of the vent hole 12 is greater than 1.5mm, excess glue will be generated, which will not only waste materials but also affect the appearance of the product. When the diameter of the vent hole 12 is less than 0.5mm, the venting effect will be affected, and the molding and bonding effect of the insert 1 and the frame 2 will be poor, thus affecting the performance and strength of the entire product.

[0039] like Figure 3 As shown, the bump 4 and the insert 1 are integrally molded through injection molding, thereby enabling rapid production without the need for separate production and subsequent assembly.

[0040] like Figure 2 As shown, one end of the support leg 3 has a through hole (not shown in the figure), the inner wall of the through hole has an internal thread, the outer surface of the insert 1 has an external thread that matches the internal thread, and the support leg 3 is fitted onto the outer surface of the insert 1. With this setting, the support leg 3 can be quickly disassembled and assembled.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connection structure conforming to a drop test under lever conditions, characterized in that, include: At least three inserts (1), each of which has one end set as an inverted cone; At least two protrusions (4) are provided at one end of the inverted cone shape of the insert (1), and an inverted cone groove (41) is formed between two adjacent protrusions (4). The inverted cone groove (41) has the smallest opening at the end furthest from the insert (1). The frame (2) is located at one end of the inverted cone shape of the insert (1) and wraps around the protrusion (4) and the inverted cone shape of the insert (1); At least three legs (3), each of which is detachably and fixedly connected to an insert (1), the legs (3) providing stable support to the frame (2).

2. The connection structure conforming to the lever state drop test according to claim 1, characterized in that: The two protrusions (4) that are furthest apart are each provided with a side groove (42) on the opposite side.

3. The connection structure conforming to the lever state drop test according to claim 2, characterized in that: The inner wall of the side groove (42) is designed with rounded corners.

4. The connection structure conforming to the lever state drop test according to claim 1, characterized in that: The insert (1) has a bottom groove (11) at the end away from the protrusion (4), and the side of the insert (1) with the protrusion (4) has several exhaust holes (12) that communicate with the bottom groove (11).

5. The connection structure conforming to the lever state drop test according to claim 4, characterized in that: The diameter of the vent (12) is 0.5mm-1.5mm.

6. The connection structure conforming to the lever state drop test according to claim 1, characterized in that: The bump (4) and the insert (1) are integrally molded by injection molding.

7. The connection structure conforming to the lever state drop test according to claim 1, characterized in that: One end of the support leg (3) has a through hole, the inner wall of the through hole has an internal thread, the outer surface of the insert (1) has an external thread that matches the internal thread, and the support leg (3) is sleeved on the outer surface of the insert (1).

8. The connection structure conforming to the lever state drop test according to claim 1, characterized in that: The frame (2) is in the shape of a long rod.

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