An adjustable shoe last assembly

Abstract

An adjustable shoe last assembly includes a forefoot component, a heel component, and an instep component. The forefoot component includes an ankle portion and a mounting groove corresponding to the instep position. The mounting groove has a first lifting groove horizontally facing the ankle portion, and a second lifting groove vertically connecting the first lifting groove on the ankle portion end face. The bottom contour of the instep component is adapted to the mounting groove. An L-shaped connecting rod passing through the first and second lifting grooves is provided on the side of the instep component adjacent to the first lifting groove. The end of the L-shaped connecting rod extending beyond the second lifting groove has a size marking. The L-shaped connecting rod slides vertically along the first and second lifting grooves to control the height difference between the instep component and the forefoot component. A limiting mechanism is provided at the ankle portion to prevent the L-shaped connecting rod from sliding. This eliminates the need to repeatedly manufacture shoe lasts with different instep thicknesses for shoes of the same size; only the instep component needs adjustment.

Description

Technical Field

[0001] This utility model relates to the technical field of shoe lasts, specifically to an adjustable shoe last assembly. Background Technology

[0002] Shoe lasts are traditional shoemaking tools. Modular shoe lasts are an innovative design method that divides the shoe last into multiple modules and combines these modules using specific fixing devices to achieve more flexible and efficient shoe last production and management. In existing technology, shoe lasts include a forefoot section and a heel section, with the heel section slidingly connected to the forefoot section. The heel section can move upwards relative to the forefoot section, allowing it to be easily removed from the shoe last after the upper is completed.

[0003] The problem with existing technology is that instep thickness is one of the key foot features that must be accurately considered in the shoemaking process. If the instep circumference / height of the shoe last is insufficient, it will compress the blood vessels and nerves in the instep when worn, leading to soreness, numbness, and potentially foot fatigue in the long term. At the same time, it will squeeze the shoe upper, causing excessive wrinkles, deformation, or even cracking (especially in leather materials).

[0004] Sports shoe lasts usually allow for a wider instep space (to accommodate slight swelling of the feet during exercise), while dress shoe lasts are designed to fit the "standard thin instep" (pursuing a tight formal silhouette). If people with thick insteps wear standard last dress shoes directly, they are very likely to experience a feeling of pressure.

[0005] This means that for the same shoe last size, different instep sizes must be prepared, and since the instep size is fixed, it is impossible to make adaptive adjustments.

[0006] Similarly, the ankle size of the shoe last also affects the comfort of wearing the shoe when it covers the ankle, requiring a structure that can be adjusted accordingly.

[0007] Therefore, the shoe last structure needs to be redesigned to accommodate size changes at the instep and ankle. Utility Model Content

[0008] To address the shortcomings of the aforementioned technologies, this invention provides an adjustable shoe last assembly.

[0009] The technical solution of this utility model is as follows: An adjustable shoe last assembly, comprising a foot component, a heel component, and an instep component. The foot component includes an ankle portion and a mounting groove corresponding to the instep position. The mounting groove has a first lifting groove facing the ankle portion in a horizontal direction. The ankle portion end face has a second lifting groove communicating with the first lifting groove in a vertical direction. The bottom contour of the instep component is adapted to the mounting groove. The side of the instep component adjacent to the first lifting groove is provided with an L-shaped connecting rod passing through the first and second lifting grooves. The end of the L-shaped connecting rod extending beyond the second lifting groove is provided with a size mark. The L-shaped connecting rod slides vertically along the first and second lifting grooves to control the height difference between the instep component and the foot component. The ankle portion is provided with a limiting mechanism to lock the sliding of the L-shaped connecting rod.

[0010] A further feature of this invention is as follows: At the end of the L-shaped connecting rod corresponding to the second lifting groove, an elongated groove is provided along the direction of the second lifting groove, penetrating the L-shaped connecting rod. A rack is provided on one side of the elongated groove. The limiting mechanism includes a rotating seat and a gear component. The rotating seat is located on the ankle end face and on both sides of the elongated groove. The gear component includes a gear portion inserted into the elongated groove and meshing with the rack, a rotating shaft portion located on both sides of the gear, and an operating wheel located at the end of the rotating shaft portion. The rotating seat is provided with a rotating hole that rotatably engages with the rotating shaft portion. The operating wheel drives the L-shaped connecting rod to slide up and down along the first and second lifting grooves in both forward and reverse directions.

[0011] A further feature of this invention is that the outer periphery of the ankle portion is provided with a groove, and the shoe last assembly also includes several splicing parts that engage with the groove. The outer periphery of these splicing parts extends beyond the groove to form the radial dimension of the ankle portion.

[0012] A further feature of this invention is that an annular airbag is fitted into the groove, extending beyond the end of the groove to form the radial dimension of the ankle.

[0013] A further feature of this invention is that the heel of the foot piece is provided with a splicing groove that matches the contour of the heel piece. The bottom surface of the splicing groove is a first arc surface and is provided with a limiting slide rail. The end face of the heel piece adjacent to the splicing groove is provided with a second arc surface that slides in cooperation with the first arc surface. The second arc surface is provided with a limiting slide groove that matches the limiting slide rod.

[0014] The beneficial effects of this utility model are as follows: By using an L-shaped connecting rod to slide vertically along the first and second lifting grooves, the height difference between the instep component and the foot component can be controlled, as shown in the attached diagram. This allows control over the instep thickness of the shoe last. Therefore, shoes of the same size do not need to be manufactured with different instep thicknesses; only the instep component needs to be adjusted to design and manufacture shoes with different instep heights, saving on shoe last costs. Through the cooperation of gear components with elongated grooves, racks, and rotating seats, the operating wheel drives the L-shaped connecting rod to precisely lift and slide along the first and second lifting grooves in both forward and reverse directions. A certain amount of friction is provided on the rotating shaft to prevent self-rotation, and size markings help identify the lifting distance, thus allowing for more precise adjustment of the instep component position.

[0015] Further design features grooves on the outer periphery of the ankle, allowing for adjustments to the radial contour of the ankle by combining splicing components or fitting air bladder components. This enables fine-tuning of the ankle size on the same shoe last, allowing for targeted design and manufacturing of shoes. Attached Figure Description

[0016] Figure 1 The structure of this utility model embodiment Figure 1 ;

[0017] Figure 2 The structure of this utility model embodiment Figure 2 ;

[0018] Figure 3 The structure of this utility model embodiment Figure 3 ;

[0019] Figure 4 The structure of this utility model embodiment Figure 4 .

[0020] Figure 5 The structure of this utility model embodiment Figure 5 .

[0021] Figure 6 The structure of this utility model embodiment Figure 6 .

[0022] Among them, 1-foot piece, 11-ankle part, 111-groove, 112-splitting piece, 113-ring airbag piece, 12-mounting groove, 13-first lifting groove, 14-second lifting groove, 15-first arc surface, 16-limiting slide rail, 2-heel piece, 21-second arc surface, 22-limiting slide groove, 3-instep piece, 31-L-shaped connecting rod, 32-size marking, 33-long oval groove, 34-rack, 41-rotating seat, 42-gear piece, 421-gear part, 422-rotating shaft part, 423-operating wheel.

[0023] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product. Furthermore, the drawings are for illustrative purposes only and should not be construed as limiting this patent. Detailed Implementation

[0024] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0025] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-6 As shown,

[0026] An adjustable shoe last assembly includes a foot component 1, a heel component 2, and an instep component 3. The foot component 1 includes an ankle portion 11 and a mounting groove 12 corresponding to the instep position. The mounting groove 12 has a first lifting groove 13 facing the ankle portion 11 in a horizontal direction. The end face of the ankle portion 11 has a second lifting groove 14 communicating with the first lifting groove 13 in a vertical direction. The bottom contour of the instep component 3 is adapted to the mounting groove 12. The side of the instep component 3 adjacent to the first lifting groove 13 is provided with an L-shaped connecting rod 31 that passes through the first lifting groove 13 and the second lifting groove 14. The end of the L-shaped connecting rod 31 that extends beyond the second lifting groove 14 is provided with a size mark 32. The L-shaped connecting rod 31 slides vertically along the first lifting groove 13 and the second lifting groove 14 to control the height difference between the instep component 3 and the foot component 1. The ankle portion 11 is provided with a limiting mechanism to lock the sliding of the L-shaped connecting rod 31.

[0027] The end of the L-shaped connecting rod 31 corresponding to the second lifting groove 14 has an elongated groove 33 that passes through the L-shaped connecting rod 31 along the direction of the second lifting groove 14. A rack 34 is provided on one side of the elongated groove 33. The limiting mechanism includes a rotating seat 41 and a gear component 42. The rotating seat 41 is provided on the end face of the ankle part 11 and is located on both sides of the elongated groove 33. The gear component 42 includes a gear part 421 inserted into the elongated groove 33 and meshing with the rack 34, a rotating shaft part 422 located on both sides of the gear, and an operating wheel 423 provided at the end of the rotating shaft part 422. The rotating seat 41 is provided with a rotating hole that rotatably engages with the rotating shaft part 422. The operating wheel 423 drives the L-shaped connecting rod 31 to slide up and down along the first lifting groove 13 and the second lifting groove 14 in both forward and reverse directions.

[0028] The outer peripheral surface of the ankle portion 11 is provided with a groove 111, and the shoe last assembly also includes a plurality of splicing parts 112 that engage with the groove 111. The outer peripheral surfaces of the plurality of splicing parts 112 extend beyond the groove 111 to form the radial dimension of the ankle portion 11.

[0029] An annular airbag 113 is fitted into the groove 111, and the annular airbag 113 extends beyond the end of the groove 111 to form the radial dimension of the ankle portion 11.

[0030] The heel of the foot piece 1 is provided with a splicing groove that matches the contour of the heel piece 2. The bottom surface of the splicing groove is a first arc surface 15 and a limiting slide rail 16 is provided. The end face of the heel piece 2 adjacent to the splicing groove is provided with a second arc surface 21 that slides with the first arc surface 15. The second arc surface 21 is provided with a limiting slide groove 22 that matches the limiting slide rod.

[0031] The L-shaped connecting rod 31 slides vertically along the first lifting groove 13 and the second lifting groove 14 to control the height difference between the instep component 3 and the foot component 1, as shown in the attached diagram of the instruction manual. This allows control over the instep thickness of the shoe last. Therefore, shoes of the same size do not need to be manufactured with different instep thicknesses; only the instep component 3 needs to be adjusted to design and manufacture shoes with different instep heights, saving on shoe last costs. Through the cooperation of the gear component 42 with the elongated groove 33, rack 34, and rotating seat 41, the operating wheel 423 drives the L-shaped connecting rod 31 to precisely lift and slide along the first lifting groove 13 and the second lifting groove 14 in both forward and reverse directions. The rotating shaft 422 is equipped with a certain friction to prevent self-rotation, and the size markings 32 help identify the lifting distance, thereby allowing for more precise adjustment of the position of the instep component 3.

[0032] In a further design, a groove 111 is provided on the outer periphery of the ankle part 11. By combining the splicing parts 112 or fitting the air bladder parts, the radial contour size of the ankle part 11 can be changed, so that the ankle size can be finely adjusted on the same size shoe last, so as to design and manufacture shoes in a targeted manner.

[0033] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. An adjustable shoe last assembly, characterized in that: The shoe last assembly includes a foot piece, a heel piece, and an instep piece. The foot piece includes an ankle portion and a mounting groove corresponding to the instep position. The mounting groove has a first lifting groove facing the ankle portion in a horizontal direction. The ankle portion end face has a second lifting groove communicating with the first lifting groove in a vertical direction. The bottom contour of the instep piece is adapted to the mounting groove. The side of the instep piece adjacent to the first lifting groove is provided with an L-shaped connecting rod passing through the first and second lifting grooves. The end of the L-shaped connecting rod extending beyond the second lifting groove is provided with a size mark. The L-shaped connecting rod slides vertically along the first and second lifting grooves to control the height difference between the instep piece and the foot piece. The ankle portion is provided with a limiting mechanism to lock the sliding of the L-shaped connecting rod.

2. The adjustable shoe last assembly according to claim 1, characterized in that: The end of the L-shaped connecting rod corresponding to the second lifting groove has an elongated groove that passes through the L-shaped connecting rod along the direction of the second lifting groove. A rack is provided on one side of the elongated groove. The limiting mechanism includes a rotating seat and a gear component. The rotating seat is provided on the end face of the ankle and is located on both sides of the elongated groove. The gear component includes a gear part inserted into the elongated groove and meshing with the rack, a rotating shaft part located on both sides of the gear, and an operating wheel provided at the end of the rotating shaft part. The rotating seat is provided with a rotating hole that rotatably engages with the rotating shaft part. The operating wheel drives the L-shaped connecting rod to slide up and down along the first lifting groove and the second lifting groove in both forward and reverse directions.

3. An adjustable shoe last assembly according to claim 1 or 2, characterized in that: The outer periphery of the ankle part is provided with a groove, and the shoe last assembly also includes several splicing parts that engage with the groove. The outer periphery of the several splicing parts extends beyond the groove to form the radial dimension of the ankle part.

4. An adjustable shoe last assembly according to claim 3, characterized in that: An annular airbag is fitted into the groove, and the annular airbag extends beyond the end of the groove to form the radial dimension of the ankle.

5. An adjustable shoe last assembly according to claim 1 or 2, characterized in that: The heel of the foot piece is provided with a splicing groove that matches the contour of the heel piece. The bottom surface of the splicing groove is a first arc surface and is provided with a limiting slide rail. The end face of the heel piece adjacent to the splicing groove is provided with a second arc surface that slides in cooperation with the first arc surface. The second arc surface is provided with a limiting slide groove that matches the limiting slide rod.

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