Air bag insole and injection mold thereof

Abstract

The air bag insole comprises an insole body, the insole body comprises a foot sole part and a heel part, a U-shaped inserting cavity is formed in the rear side of the heel part, a U-shaped air bag strip matched with the U-shaped inserting cavity is arranged on the U-shaped inserting cavity, the rear side of the U-shaped inserting cavity is open, and the air bag strip is arranged in the U-shaped inserting cavity. The U-shaped air bag strip is inserted into the U-shaped inserting cavity from the opening, the U-shaped inserting cavity comprises vertical holes located in the two sides and a connecting groove connecting the two vertical holes, the two ends of the U-shaped air bag strip are inserted into the corresponding vertical holes, and an anti-retreating structure limiting pulling out of the U-shaped air bag strip is further arranged between the U-shaped air bag strip and the vertical holes. The U-shaped inserting cavity is formed in the heel part, the U-shaped air bag strip is inserted into the U-shaped inserting cavity, and the anti-retreating structure is arranged between the head position of the air bag strip and the U-shaped inserting cavity, so that the air bag strip is prevented from falling out, and the shoe is more stable in use.

Description

Technical Field

[0001] This utility model relates to the field of shoe insole technology, and in particular to an airbag shoe insole and its injection mold. Background Technology

[0002] In the prior art, airbag insoles include an insole body, which includes a forefoot portion and a heel portion. An airbag pad is provided on the heel portion. Existing airbag pads usually use a U-shaped airbag strip. Assembly is achieved by opening an assembly groove in the middle of the heel portion and inserting the airbag strip into the assembly groove. However, the airbag strip is prone to slipping out, and its stability is relatively poor. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide an airbag insole. A U-shaped insertion cavity is set at the heel, and a U-shaped airbag strip is inserted into the U-shaped insertion cavity. An anti-retraction structure is set between the head of the airbag strip and the U-shaped insertion cavity to prevent the airbag strip from falling out, making it more stable during use.

[0004] This utility model discloses an airbag insole, including an insole body, which includes a foot portion and a heel portion. A U-shaped insertion cavity is provided on the rear side of the heel portion, and a U-shaped airbag strip adapted to it is provided on the U-shaped insertion cavity. The rear side of the U-shaped insertion cavity is open, and the U-shaped airbag strip is inserted into the U-shaped insertion cavity from the opening. The U-shaped insertion cavity includes vertical holes on both sides and a connecting groove connecting the two vertical holes. The two ends of the U-shaped airbag strip are inserted into the corresponding vertical holes. An anti-retraction structure is also provided between the U-shaped airbag strip and the vertical holes to prevent the U-shaped airbag strip from being pulled out.

[0005] A further feature of this invention is that the anti-retraction structure includes a barb at the end of the U-shaped airbag strip and an abutment surface inside the vertical hole. The barb is made of a deformable material and is tightened or snapped onto the abutment surface.

[0006] A further feature of this invention is that the two ends of the U-shaped airbag strip are inserted into the corresponding vertical holes and adhered to the inner wall of the vertical holes.

[0007] A further feature of this invention is that the vertical hole has a built-in inclined guide surface, so that the bottom of the vertical hole is constricted, with the larger diameter located on the inner side and the smaller diameter located on the outer side. The barb is formed by heat-pressing the end of the U-shaped airbag strip and is tightened on the inclined guide surface.

[0008] The beneficial effects of this utility model are as follows: When in use, the U-shaped airbag strip can be assembled into the U-shaped insertion cavity from the opening, and both ends of the U-shaped airbag strip can be inserted into the vertical holes. At the same time, the U-shaped airbag strip is locked by the anti-retraction structure to prevent it from easily coming out, making the U-shaped airbag strip more stable during use.

[0009] Another objective of this utility model is to provide an airbag insole injection mold, wherein the mold body includes a lower mold and an upper mold that can be covered on the lower mold, an insole forming cavity is provided between the upper mold and the lower mold, and a U-shaped protrusion is provided at the heel position of the insole forming cavity located at the lower mold, wherein the end of the U-shaped protrusion gradually decreases in size from the outside to the inside.

[0010] Using the above technical solution, injection molding material can be injected into the insole molding cavity. At this time, because of the U-shaped protrusion, a U-shaped insertion cavity will be formed when the insole is molded, and the head of the U-shaped insertion cavity will form a constricted shape. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the insole body structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the heel structure of this utility model;

[0013] Figure 3 This is a cross-sectional view of the present invention;

[0014] Figure 4 This is a schematic diagram of the U-shaped airbag strip structure of this utility model;

[0015] Figure 5 This is a schematic diagram of the mold body structure of this utility model;

[0016] Figure 6 This is a schematic diagram of the U-shaped convex strip structure of this utility model. Detailed Implementation

[0017] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] This utility model discloses an airbag insole, including an insole body 1. The insole body 1 includes a foot portion 11 and a heel portion 12. A U-shaped insertion cavity 2 is provided on the rear side of the heel portion 12. A U-shaped airbag strip 3 adapted to the U-shaped insertion cavity 2 is provided on the U-shaped insertion cavity 2. The rear side of the U-shaped insertion cavity 2 is open, and the U-shaped airbag strip 3 is inserted into the U-shaped insertion cavity 2 from the opening. The U-shaped insertion cavity 2 includes vertical holes 21 located on both sides and a connecting groove connecting the two vertical holes 21. 22. The two ends of the U-shaped airbag strip 3 are inserted into the corresponding vertical holes 21. There is also an anti-retraction structure 4 between the U-shaped airbag strip 3 and the vertical holes 21 to prevent the U-shaped airbag strip 3 from being pulled out. When in use, the U-shaped airbag strip 3 can be installed into the U-shaped insertion cavity 2 from the opening, and the two ends of the U-shaped airbag strip 3 can be inserted into the vertical holes 21. At the same time, the anti-retraction structure 4 locks the U-shaped airbag strip 3, preventing it from easily coming out, making the U-shaped airbag strip 3 more stable when in use.

[0020] The anti-retraction structure 4 includes a barb 41 at the end of the U-shaped airbag strip 3 and an abutment surface 42 in the vertical hole 21. The barb 41 is made of a deformable material and is tightened or locked onto the abutment surface 42. During assembly, the barb 41 can be deformed by external force and inserted into the vertical hole 21. When the barb 41 is inserted to the designated position, its restoring force will act on the abutment surface 42, thereby increasing the resistance to pull out and preventing the U-shaped airbag strip 3 from easily coming out.

[0021] The anti-retraction structure 4 can also be that the U-shaped airbag strip 3 is inserted into the U-shaped insertion cavity 2, and the two ends of the U-shaped airbag strip 3 are glued to the inner wall of the vertical hole 21 to prevent it from falling out, making it more stable during use.

[0022] The vertical hole 21 has a built-in inclined guide surface 5 (the abutting surface 42 is connected to the inclined guide surface 5 as a whole), so that the bottom of the vertical hole 21 is constricted, with the larger diameter on the inside and the smaller diameter on the outside. The barb 41 is formed by heat-pressing the end of the U-shaped airbag strip 3 and is tightened on the inclined guide surface 5. When the U-shaped airbag strip 3 is formed, it needs to be heat-pressed to cut off both ends. After cutting, a part of the heat-pressed edge will remain, and this part will increase the radial width. Therefore, the bottom diameter of the vertical hole 21 is relatively large, which can be matched with it. This avoids the trimming process and prevents the U-shaped airbag strip 3 from being pulled out. The structural layout is more reasonable. Example

[0023] Another objective of the utility model is to provide an airbag insole injection mold, wherein the mold body 6 includes a lower mold 61 and an upper mold 62 that can be covered on the lower mold 61, an insole forming cavity 7 is provided between the upper mold 62 and the lower mold 61, and a U-shaped protrusion 8 is provided at the heel position of the insole forming cavity 7 located at the lower mold 61, wherein the end of the U-shaped protrusion 8 gradually decreases in size from the outside to the inside.

[0024] Using the above technical solution, injection molding material can be injected into the insole molding cavity 7. At this time, because of the U-shaped protrusion 8, a U-shaped insertion cavity will be formed when the insole is molded, and the head of the U-shaped insertion cavity will form a constricted shape.

Claims

1. An airbag insole, comprising an insole body (1), the insole body (1) comprising a foot portion (11) and a heel portion (12), wherein a U-shaped insertion cavity (2) is provided on the rear side of the heel portion (12), and a U-shaped airbag strip (3) adapted thereto is provided on the U-shaped insertion cavity (2), wherein the rear side of the U-shaped insertion cavity (2) is open, and the U-shaped airbag strip (3) is inserted into the U-shaped insertion cavity (2) from the opening, characterized in that: The U-shaped insertion cavity (2) includes vertical holes (21) on both sides and a connecting groove (22) connecting the two vertical holes (21). The two ends of the U-shaped airbag strip (3) are inserted into the corresponding vertical holes (21). A retraction prevention structure (4) is also provided between the U-shaped airbag strip (3) and the vertical holes (21) to restrict the U-shaped airbag strip (3) from being pulled out.

2. An airbag insert as defined in claim 1, wherein: The anti-retraction structure (4) includes a barb (41) at the end of the U-shaped airbag strip (3) and an abutment surface (42) in the vertical hole (21). The barb (41) is made of a deformable material and is tightened or snapped onto the abutment surface (42).

3. An airbag insert as defined in claim 1, wherein: The two ends of the U-shaped airbag strip (3) are inserted into the corresponding vertical holes (21) and adhered to the inner wall of the vertical holes.

4. An air bag insole according to claim 2, wherein: The vertical hole (21) has a built-in inclined guide surface (5) so that the bottom of the vertical hole (21) is constricted, with the large diameter located on the inside and the small diameter located on the outside. The barb (41) is formed by heat-heating the end of the U-shaped airbag strip (3) and is tightened on the inclined guide surface (5).

5. An injection mold for an airbag insole, comprising a mold body (6) for preparing the insole body according to any one of claims 1-4, the mold body (6) comprising a lower mold (61) and an upper mold (62) that can be covered on the lower mold (61), an insole forming cavity (7) being provided between the upper mold (62) and the lower mold (61), characterized in that: A U-shaped protrusion (8) is provided at the heel position of the insole forming cavity (7) located in the lower mold (61), and the end of the U-shaped protrusion (8) gradually decreases in size from the outside to the inside.

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