Shock-absorbing device for shoes

Abstract

The present invention relates to a shock-absorbing device for shoes, wherein a single elevating guide unit guides elevating movements of the upper plate with respect to the lower plate such that the number of components can be reduced, thereby achieving weight reduction, simplifying assembly processes, and reducing noise.

Description

Shock absorbers for shoes

[0001] The present invention relates to a shock absorber for shoes, which can achieve weight reduction, simplification of the assembly process, and reduction of noise by guiding the elevation of an upper plate relative to a lower plate with a single elevation guide unit, thereby reducing the number of parts.

[0002] As a conventional cushioning shoe using a spring, for example, one known in the patent literature (Korean Patent No. 10-1965401) has been proposed.

[0003] As shown in FIGS. 8 to 10, the cushioning shoe of the patent document has four springs (100) positioned between a lower spring sheet (400) and an upper spring sheet (500), and four lifting guides (600) can guide the lifting of the upper sole (300) relative to the outsole (200).

[0004] Since these conventional cushioning shoes are assembled with four lifting guides (600), the number of parts is large and the assembly process is complex, and in particular, noise may be generated in proportion to the number of lifting guides (600) due to friction caused by the lifting of the upper sole (300).

[0005] To minimize this noise, a process of applying grease to the lifting guide (600) may also be added.

[0006] Also, since the spring is exposed to the outside, if a lot of dust accumulates while wearing it, it may become stiff and not move well.

[0007] [Prior Art Literature]

[0008] [Patent Document]

[0009] (Patent Document 1) Korean Patent No. 10-1965401 (Published on April 3, 2019)

[0010] The present invention aims to solve the above-mentioned problem by providing a cushioning shoe that can achieve weight reduction, simplification of the assembly process, and reduction of noise by reducing the number of parts by guiding the upper plate to be raised or lowered with a single lifting guide part.

[0011] In order to achieve the above-described object, the shoe shock absorber of the present invention is a shock absorber installed between the upper sole and the outsole of the heel, and may include an upper plate installed on the underside of the upper sole, a lower plate installed on the upper surface of the outsole, a plurality of springs, an upper sheet formed on the lower surface of the upper plate and on which the upper side of the spring is seated, a lower sheet formed on the upper surface of the lower plate opposite each of the upper sheets and on which the lower side of the spring is seated, and a single lifting guide part installed on the inner side connecting the plurality of springs and guiding the upper plate to be lifted relative to the lower plate.

[0012] In addition, in order to achieve the aforementioned purpose, the cushioning shoe of the present invention may be configured such that the plurality of springs are arranged in four square shapes, and the single lifting guide portion may be installed on the diagonal center line of the springs.

[0013] In addition, the shoe shock absorber of the present invention for achieving the aforementioned purpose may further include a cushioning insert that surrounds the springs between the upper and lower plates.

[0014] In addition, the shoe shock absorber of the present invention for achieving the aforementioned purpose may include a through hole through which the spring passes, in which the cushion insertion part is formed.

[0015] The shoe cushioning device of the present invention has the following effects.

[0016] By guiding the elevation of the upper plate relative to the lower plate by a single elevation guide installed within the plane of a plurality of springs, the assembly process is simplified with a minimum number of parts, and the weight is reduced while noise caused by elevation friction is minimized as much as possible.

[0017] In addition, since a cushion insert that wraps around the outer or inner / outer sides of a plurality of springs is assembled between the upper and lower plates, there is no concern that dust or the like will accumulate on the springs as well as the single lifting guide, and thus stable lifting operation can be maintained, thereby improving durability.

[0018] FIG. 1 and FIG. 2 are side views and plan views illustrating a shock absorber for shoes according to an embodiment of the present invention.

[0019] Figure 3 is a cross-sectional view taken around the spring in Figure 1.

[0020] Fig. 4 is a cross-sectional view taken around the lifting guide part of Fig. 1.

[0021] Fig. 5 is a cross-sectional view showing that the cushion insert wraps around the spring of Fig. 3.

[0022] Figures 6a to 6c are graphs analyzing the degree of stabilization of walking motion before and after wearing a shoe to which a shoe shock absorber according to the present invention is applied.

[0023] Figures 7a and 7b are graphs analyzing the left-right pelvic balance before and after wearing a shoe to which a shoe shock absorber according to the present invention is applied.

[0024] Figure 8 is a schematic diagram showing a conventional cushioning shoe using a spring.

[0025] Fig. 9 is a longitudinal cross-sectional view showing the main part of Fig. 8.

[0026] Figure 10 is a perspective view showing the configuration of a conventional elevator guide.

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0028] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0029] In addition, the same reference numerals are given to the same parts as the conventional ones, and detailed descriptions are omitted.

[0030] FIG. 1 and FIG. 2 are side views and plan views illustrating a shoe shock absorber according to an embodiment of the present invention, FIG. 3 is a cross-sectional view taken around a spring in FIG. 1, and FIG. 4 is a cross-sectional view taken around a lifting guide part in FIG. 1.

[0031] The shoe shock absorber (1) according to the present embodiment can be installed between the outsole (200) of the heel and the upper sole (300) with reference to FIGS. 6a to 6c. The outsole (200) and the upper sole (300) can be made of a material such as polyurethane (PU).

[0032] Referring to Fig. 1, a shoe shock absorber (1) may include an upper plate (10). The upper plate (10) may be made of thermosetting polyurethane (TPU). The upper plate (10) may be fixed to the underside of the upper sole (300). The fixation may be achieved through bonding or insert injection molding. In particular, referring to Fig. 2, a rib (15) may be formed on the upper surface of the upper plate (10), thereby enhancing the bonding strength with the upper sole (300) during insert injection molding. The rib (15) may be formed by a ribbed structure.

[0033] Referring to Fig. 1, a shoe shock absorber (1) may include a lower plate (20). The lower plate (20) may also be made of thermosetting polyurethane (TPU) material. The lower plate (20) may be fixed to the upper surface of the outsole (200). The fixation may be achieved through bonding or insert injection molding.

[0034] The upper plate (10) may include an upwardly inclined plate (11) that slopes upward from the front to the rear of the lower plate (20), and a horizontal inclined plate (13) that extends from the upwardly inclined plate (11). The space between the horizontal inclined plate (13) and the lower plate (20) may enable the upper plate (10) to be raised or lowered relative to the lower plate (20).

[0035] A shoe shock absorber (1) may include a plurality of springs (30). The springs (30) may be arranged in a triangular or rectangular arrangement when viewed from a plan view. In the present embodiment, the springs (30) may be arranged in four rectangular shapes. The springs (30) may be compression coil springs. In particular, the spacing (d) between the spirals of the springs (30) may be considerably wider than that of a general coil spring. This wide spacing (d) can secure a minimum amount of downward movement of the upper plate (10).

[0036] A shock absorber (1) for shoes may include an upper sheet (40). The upper sheet (40) may be formed on the underside of the upper plate (10). The upper sheet (40) may be provided with an upper portion of a spring (30).

[0037] Referring to FIG. 3, the upper seat (40) may include an upper seat groove (41). The upper seat groove (41) may be a seat (seat) groove where the upper end of the spring (30) is seated. The upper seat groove (41) may be ring-shaped.

[0038] Referring to FIG. 3, the upper sheet (40) may include an upper downward protrusion (43). The upper downward protrusion (43) may be an insertion protrusion inserted into the upper inner side of the spring (30). The upper downward protrusion (43) may protrude further than the lower upward protrusion (53) described below. This may be advantageous for protruding a little longer for the purpose of guiding the elevation as the upper plate (10) is raised and lowered.

[0039] The shoe shock absorber (1) may include a lower sheet (50). The lower sheet (50) may be formed on the upper surface of the lower plate (20) corresponding to the upper sheet (40). The lower side of the spring (30) may be secured to the lower sheet (50).

[0040] Referring to FIG. 3, the lower seat (50) may include a lower seat groove (51) like the upper seat (40). The lower seat groove (51) may be a groove (seat) where the lower end of the spring (30) is seated. The lower seat groove (41) may be ring-shaped.

[0041] Referring to FIG. 3, the lower seat (50) may include a lower upper protrusion (53). The lower upper protrusion (33) may be an insertion protrusion inserted into the lower inner side of the spring (30). The height of the lower upper protrusion (43) may be approximately the depth of the fine of the lower seat groove (41).

[0042] Referring to Fig. 4, the shoe shock absorber (1) may include a single lifting guide (60). The single lifting guide (60) may be installed on the inner center connecting the springs (30). The single lifting guide (60) may guide the lifting of the upper plate (10) relative to the lower plate (20).

[0043] By forming this lifting guide part (60) as a single part positioned at the central position for lifting, the number of parts can be innovatively reduced, thereby achieving weight reduction, process simplification, and minimization of noise generation.

[0044] The lifting guide part (60) may include a guide pin (61). An arrowhead-shaped upper engaging protrusion (62) may be formed on the upper end of the guide pin (61). The guide pin (61) and the upper engaging protrusion (62) may be composed of two, three, or four split guide pins (61) and split upper engaging protrusions (62). That is, the split upper engaging protrusion (62) may have a one-touch wedge structure that folds when inserted upward from below into the through hole (17) of the upper plate (10), and opens after being inserted to engage the upper end of the through hole (17).

[0045] The lifting guide part (60) may include a flange-type catch (63). The catch (63) may be formed on the lower side of the split guide pin (61). The catch (63) may be caught on a catch groove (27) having a larger diameter than the through hole (25) of the lower plate (20).

[0046] Fig. 5 is a cross-sectional view showing that the cushion insert wraps around the spring of Fig. 3.

[0047] Referring to FIG. 5, the shoe cushioning device (1) may include a cushion insert (70).

[0048] The cushion insert (70) can be installed between the upper plate (10) and the lower plate (20).

[0049] In addition, the cushion insert (70) has a shape that surrounds the springs (30). This cushion insert (70) can prevent dust and the like from penetrating into the springs (30).

[0050] The cushion insert (70) may include a through hole (71) through which the spring (30) passes. That is, the cushion insert (70) may be in the shape of a belt having a through hole (71).

[0051] The number of through holes (71) can be formed as many as the number of springs (30).

[0052] The center of the cushion insert (70) may be hollow in which the lifting guide (60) is placed.

[0053] The usefulness of shoes using the shoe cushioning device of the present invention has been proven based on reviews from consumers who have actually used them.

[0054] Among the many consumers who have tried shoes with shoe cushioning devices, (1) patients with herniated discs (lumbar discs) reported a reduction in back pain, (2) patients with degenerative arthritis also reported relief in joint pain, and (3) users with plantar fasciitis also reported a reduction in foot fatigue.

[0055] Additionally, consumers who do not have the above-mentioned diseases report that shoes using the shoe cushioning device of the present invention were of great help in maintaining a correct walking posture.

[0056] Not only through consumer reviews but also through objective experimental data, it is possible to prove the effects of (1) stabilization of walking motion and (2) increased pelvic left-right balance achieved by shoes using the shoe cushioning device (1) of the present invention.

[0057] Figures 6a to 6c and Figures 7a and 7b are graphs visualizing experimental data that objectively analyzed the decline in walking ability and functional recovery (jump performance and functional ability) according to treatment using a G-(walk) sensor, a specialized device used for training and research in rehabilitation centers, medical facilities, research facilities, etc.

[0058] As shown in FIGS. 6a to 6c, a shoe to which the shoe shock absorber (1) of the present invention is applied can easily achieve stabilization of walking motion, i.e., balanced walking.

[0059] First, to explain the results that occurred during the gait cycle, the gait cycle is artificially classified into 0-100% and divided into the standing phase and the swing phase.

[0060] The stance phase is when the foot touches the ground and body weight is transferred to the opposite leg. The swing phase is when the lower limb lifts off the ground and moves forward, with body weight transferred to the opposite lower limb. The stance phase accounts for approximately 60% of the gait phase, and the swing phase accounts for the remaining 40%.

[0061] The narrower and more uniform the vertical gap in the red graph, the more stable the walking motion.

[0062] Before wearing the shoes to which the shoe shock absorber (1) of the present invention is applied, it can be seen that the upper and lower intervals of the red graph are wide and uneven (see before wearing), but after wearing, the upper and lower intervals of the red graph are narrow and uniform (see after wearing).

[0063] As shown in Figures 7a and 7b, a shoe to which the shoe shock absorber (1) of the present invention is applied can easily improve the left-right balance of the pelvis.

[0064] The narrower the gap between the two lines (=yellow area on the graph), the better the balance between the left and right pelvis.

[0065] Before wearing shoes to which the shoe shock absorber (1) of the present invention is applied, the gap between the two lines is wide, which means that the pelvic balance that corrects the center of gravity when walking is not achieved and the pelvis shakes left and right significantly.

[0066] After wearing, the gap between the two lines becomes narrower, which means that the pelvic balance is achieved to correct the center of gravity when walking, and the left-right shaking of the pelvis is significantly reduced compared to before wearing.

[0067] Any or all of the embodiments of the present invention described above are neither mutually exclusive nor distinct. Any or all of the embodiments of the present invention described above may have their respective components or functions combined or used together.

[0068] It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics thereof. The above detailed description should not be construed in any way as limiting but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0069] [Explanation of symbols]

[0070] 1: Shoe cushioning device 10: Upper plate

[0071] 11: Inclined plate 13: Horizontal plate

[0072] 5: Rib 20: Lower plate

[0073] 30: Spring 40: Upper seat

[0074] 41: Upper seat groove 43: Upper lower protrusion

[0075] 50: Lower Thief 51: Lower Seat Home

[0076] 53: Lower upward projection 60: Single lifting guide

[0077] 61: Split guide pin 62: Upper catch

[0078] 63: Hook 70: Cushion insert

[0079] 200: Outsole 300: Upper sole

Claims

1. A shock absorber for shoes installed between the upper sole and the outsole of the heel. A top plate installed on the underside of the upper sole, A lower plate installed on the upper surface of the above outsole, A plurality of upper sheets formed on the above top plate, A lower sheet formed on the lower plate opposite each of the upper sheets, A plurality of springs installed between the upper seat and the lower seat, A single lifting guide part installed on the inside connecting the plurality of springs and guiding the upper plate to be lifted relative to the lower plate, Shock absorbers for shoes.

2. In paragraph 1, The above multiple springs are arranged in four square shapes, The above single lifting guide part is installed on the diagonal center line of the above spring, Shock absorbers for shoes.

3. In paragraph 2, Between the upper and lower plates, a cushion insert that wraps the springs is further installed. Shock absorbers for shoes.

4. In paragraph 3, The above cushion insertion part is, Including a through hole through which the spring penetrates, Shock absorbers for shoes.

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