A three-dimensional adjustable shoe stretcher

Abstract

This utility model belongs to the field of shoe expanders and provides a three-dimensional adjustable shoe expander, including a driving component. The driving component includes a screw and a threaded sleeve. The threaded sleeve converts the rotational motion of the screw into the axial linear displacement of the heel last. An adjustable shoe last is provided at the end of the screw. The adjustable shoe last includes a fixed base, a foot last, an expansion block, and an instep last. The fixed base is used to convert the rotational motion of the screw into the axial displacement of the expansion block. The top surface and both sides of the expansion block are provided with inclined structures. This utility model uses the rotation of the threaded sleeve to drive the axial movement of the heel last to adjust the shoe length. At the same time, the interaction between the inclined guide groove and the expansion block realizes the lateral expansion of the half-foot last. The expansion block pushes the push block to make the instep last rotate, realizing the adjustment of the instep height. It has a three-dimensional adjustment effect, which solves the problem that traditional shoe expanders can only adjust one type of foot and adapts to the needs of different foot shapes.

Description

Technical Field

[0001] This utility model belongs to the field of shoe expanders, specifically a three-dimensional adjustable shoe expander. Background Technology

[0002] In daily life, shoes are an essential item of clothing, and their comfort directly affects people's quality of life. However, because everyone's foot shape is different, including differences in length, width, and instep height, even if the shoes purchased seem to fit properly, they may not fit properly during actual wear. To solve this problem, shoe expanders have emerged.

[0003] Most shoe stretchers on the market can only be adjusted in one direction, usually the length or width of the shoe. For example, some shoe stretchers use a simple screw structure that can only stretch the length of the shoe, but cannot adjust the width or instep height. Different people have different foot shapes, and some may need to adjust the length, width, and instep height of the shoe simultaneously to achieve a comfortable fit. However, existing shoe stretchers with only one adjustment function cannot meet this personalized need. For example, for users with wide feet and high insteps, traditional shoe stretchers cannot effectively expand the width of the shoe and the instep area at the same time, leaving the user still unable to achieve a comfortable wearing experience. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a three-dimensional adjustable shoe expander, which solves the problem that most existing shoe expanders can only be adjusted in one direction, usually adjusting the length or width of the shoe.

[0005] A three-dimensional adjustable shoe expander includes a drive assembly comprising a screw and a threaded sleeve, wherein the threaded sleeve is converted into axial linear displacement of the heel last through rotational motion, and an adjustable shoe last is provided at the end of the screw.

[0006] The adjustable shoe last includes a fixed base, a foot last body, an expansion block, and an instep last body. The fixed base is used to convert the rotational motion of the screw into the axial displacement of the expansion block. The top surface and both sides of the expansion block are provided with inclined structures. The foot last body and the instep last body are coupled with the inclined surfaces of the expansion block to control the shoe width and adjust the instep height.

[0007] Preferably, the fixed seat includes a support seat slidably sleeved on the screw, and the inner side of the support seat is provided with a threaded block for converting the rotational motion of the screw into the axial displacement of the expansion block.

[0008] Preferably, the foot last includes half-lasts disposed on both sides of the support base. A guide groove is provided on the side of the half-last near the expansion block, and an inclined surface is provided in the guide groove for cooperating with the expansion block to control the shoe width.

[0009] Preferably, the support base is provided with a plurality of guide posts, the two ends of which slide through the half-last body and are fitted with elastic elements for automatic return of the half-last body.

[0010] Preferably, the instep last is hinged to the support base.

[0011] Preferably, the instep last is provided with a groove, and a push block with an inclined bottom is slidably disposed in the groove, which is used to manually adjust the engagement position of the push block in the groove and selectively enable or disable the instep support function.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model utilizes the combined use of a drive component, a heel last, and an adjustable shoe last. The rotation of the threaded sleeve drives the axial movement of the heel last to adjust the shoe length. Simultaneously, the interaction between the inclined guide groove and the expansion block achieves lateral expansion of the semi-shoe last to adjust the toe width. The expansion block pushes the push block, causing the instep last to rotate, thus adjusting the toe height. Compared to existing technologies, this model offers three-dimensional adjustment, solving the problem of traditional shoe expanders only allowing for single-adjustment and adapting to different foot shapes.

[0014] 2. This utility model uses a combination design of hinged instep last and sliding push block. The push block slides in the groove, and the user can manually select to enable or disable the instep adjustment function. Compared with the prior art, it has the effect of precisely controlling the support height and improving the ability to personalize the fit. Attached Figure Description

[0015] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0018] In the picture:

[0019] 1. Drive assembly; 101. Screw; 102. Threaded sleeve; 103. Tightener; 2. Heel last; 3. Adjustable last; 301. Fixing base; 3011. Support base; 3012. Threaded block; 3013. Guide post; 302. Foot last; 3021. Half last; 3022. Guide groove; 303. Expansion block; 304. Instep last; 4. Push block; 5. Return spring; 6. Slide groove. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] As attached Figure 1 To be continued Figure 3 As shown: This utility model provides a three-dimensional adjustable shoe expander, including a drive assembly 1. The drive assembly 1 includes a screw 101 and a threaded sleeve 102, which are connected by a thread. This connection method can efficiently convert the rotational motion of the threaded sleeve 102 into the axial linear displacement of the heel last 2. The end of the screw 101 is connected to an adjustable shoe last 3. This connection enables the drive assembly 1 to effectively drive the adjustable shoe last 3 to operate, realizing the three-dimensional adjustment of the shoe.

[0022] As attached Figure 2 To be continued Figure 3 As shown: The adjustable shoe last 3 includes a fixed base 301, a foot last 302, an expansion block 303, and an instep last 304. The support seat 3011 of the fixed base 301 is slidably sleeved on the screw 101, and the threaded block 3012 on the inner side of the support seat 3011 is threadedly engaged with the screw 101. The expansion block 303 is rotatably mounted at the end of the screw 101, and its top surface and both sides have inclined structures. This connection method allows the rotational movement of the screw 101 to be converted into the axial displacement of the expansion block 303, thereby driving the foot last 302 and the instep last 304 to move, achieving adjustment of dimensions such as shoe width and height.

[0023] As attached Figure 3 As shown: The foot last 302 consists of half-lasts 3021 positioned on both sides of the support base 3011. Two guide posts 3013 pass through the support base 3011 and the half-lasts 3021 and are connected to nuts. A guide groove 3022 with an inclined surface is provided on the side of the half-last 3021 near the expansion block 303, used to cooperate with the expansion block 303 to precisely control the shoe width. The half-last 3021 is connected to the support base 3011 via a return spring 5, with both ends of the return spring 5 slidingly fitted onto the guide posts 3013. This connection method allows the half-last 3021 to automatically return to its original position under the action of the return spring 5, and also to move laterally along the direction of the return spring 5 under external force, achieving the expansion and restoration of the shoe width.

[0024] As attached Figure 2 As shown, the instep last 304 is hinged to the support base 3011 via a hinge shaft. This hinged connection allows the instep last 304 to rotate around the hinge point. A push block 4 with an inclined bottom is slidably disposed within a groove 6 on the instep last 304. By manually adjusting the position of the push block 4 in the groove 6, the rotation angle of the instep last 304 can be controlled, thereby adjusting the instep height of the shoe. Simultaneously, the instep last 304 is coupled to the inclined top surface of the expansion block 303. When the instep last 304 rotates, it can drive the expansion block 303 to move upward, enhancing the support effect on the instep portion of the shoe.

[0025] As attached Figure 1 As shown: A handle 103 is fixedly installed at the end of the threaded sleeve 102, and the handle 103 is movably sleeved on the screw 101. By turning the handle 103, the user can easily drive the threaded sleeve 102 to rotate around the screw 101, thereby pushing the heel last 2 to move along the axial direction of the screw 101, thus realizing convenient adjustment of the shoe length.

[0026] Working principle: The shoe stretcher is placed inside the shoe, with the heel last 2 positioned at the heel and the adjustable last 3 positioned at the forefoot and instep. Turning the handle 103 causes the threaded sleeve 102 to rotate around the screw 101. Due to the threaded engagement, the rotation of the threaded sleeve 102 is converted into axial linear motion, pushing the heel last 2 to move axially along the screw 101, increasing the distance between the heel last 2 and the adjustable last 3, thus lengthening the shoe.

[0027] When the screw 101 rotates, the support base 3011 experiences axial displacement due to the engagement of the threaded block 3012 with the screw 101, causing the expansion block 303 to move synchronously. The inclined surfaces on both sides of the expansion block 303 interact with the inclined surfaces in the guide groove 3022 of the half-last 3021, causing the half-last 3021 to move to both sides, expanding the width of the shoe. After the shoe expander is released, the elastic force of the return spring 5 causes the half-last 3021 to automatically return to its original position.

[0028] The position of the push block 4 in the slide groove 6 is manually adjusted. When the push block 4 slides upward, its bottom inclined surface pushes the instep last 304 to rotate upward around the hinge point. Because the instep last 304 is coupled with the inclined surface of the top surface of the expansion block 303, the expansion block 303 moves upward, raising the instep portion of the shoe. By adjusting the engagement position of the push block 4 in the slide groove 6, the instep raising function can be selectively enabled or disabled, and the degree of raising can be adjusted.

[0029] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A three-dimensional adjustable shoe expander, comprising a drive assembly (1), characterized in that: The drive assembly (1) includes a screw (101) and a threaded sleeve (102). The threaded sleeve (102) is converted into axial linear displacement of the heel last (2) through rotational motion. An adjustable shoe last (3) is provided at the end of the screw (101). The adjustable shoe last (3) includes a fixed base (301), a foot last (302), an expansion block (303), and an instep last (304). The fixed base (301) is used to convert the rotational motion of the screw (101) into the axial displacement of the expansion block (303). The top surface and both sides of the expansion block (303) are provided with inclined structures. The foot last (302) and the instep last (304) are coupled with the inclined surfaces of the expansion block (303) to control the shoe width and adjust the instep height.

2. The three-dimensional adjustable shoe expander as described in claim 1, characterized in that: The fixed seat (301) includes a support seat (3011) slidably sleeved on the screw (101). The inner side of the support seat (3011) is provided with a threaded block (3012) for converting the rotational motion of the screw (101) into the axial displacement of the expansion block (303).

3. The three-dimensional adjustable shoe expander as described in claim 2, characterized in that: The foot last (302) includes half-lasts (3021) disposed on both sides of the support base (3011). A guide groove (3022) is provided on the side of the half-last (3021) near the expansion block (303). An inclined surface is provided in the guide groove (3022) for cooperating with the expansion block (303) to control the shoe width.

4. The three-dimensional adjustable shoe expander as described in claim 3, characterized in that: The support base (3011) is provided with a plurality of guide posts (3013), the two ends of which slide through the half last (3021) and are fitted with elastic elements for the automatic return of the half last (3021).

5. The three-dimensional adjustable shoe expander as described in claim 4, characterized in that: The instep last (304) is hinged to the support base (3011).

6. The three-dimensional adjustable shoe expander as described in claim 5, characterized in that: The instep last (304) is provided with a groove (6), and a push block (4) with an inclined bottom is slidably disposed in the groove (6) for manually adjusting the engagement position of the push block (4) in the groove (6) to selectively enable or disable the instep support function.

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