CN113749350A

CN113749350A - Length-adjustable telescopic shoes

Info

Publication number: CN113749350A
Application number: CN202111089831.7A
Authority: CN
Inventors: 王志和
Original assignee: Haotongxue Putian Technology Co ltd
Current assignee: Haotongxue Putian Technology Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2021-12-07
Anticipated expiration: 2041-09-17
Also published as: CN113749350B

Abstract

The invention discloses a length-adjustable telescopic shoe, wherein a sole comprises a sole part, a telescopic piece and a heel part, wherein the sole part and the heel part are connected through the telescopic piece; the telescopic piece comprises a first telescopic part, a second telescopic part and a fixing bolt, and when the telescopic amount of the telescopic piece is adjusted, the first telescopic part slides in the second telescopic part; the first telescopic portion is provided with a fixing tooth in limit fit with the fixing bolt, and the second telescopic portion is provided with a first through hole for the fixing bolt to penetrate through. This length adjustable's flexible shoes messenger can be along with the length of foot type growth demand and convenient regulation shoes, shoes simple operation, comfortable health, sturdy and durable, production is convenient.

Description

Length-adjustable telescopic shoes

Technical Field

The invention relates to the field of children shoes, in particular to a pair of telescopic shoes with adjustable lengths.

Background

As the foot shape of the children grows and develops fast, the children shoes on the market at present are basically fixed in size, do not have the function of telescopic adjustment, and cannot meet the requirement of the foot shape growth of the children. Parents can usually buy shoes which are larger than the actual codes of the children by one code in order to prolong the wearing period of the shoes when buying the shoes of the children, so that the children cannot wear the shoes which are most suitable for the feet of the children all the time, and great harm is brought to the development and health of the feet. In addition, under the condition that the existing children shoes can not meet the requirement of the foot length of children, the existing children shoes still do not reach the damage elimination degree, but are abandoned due to improper sizes, so that the resources are effectively greatly wasted, and the family expenditure cost is increased.

Therefore, the technical problem that the size of the children shoes can not be adjusted along with the requirement of foot growth is urgently needed to be solved.

Disclosure of Invention

In view of the defects or shortcomings in the prior art, the invention provides the length-adjustable telescopic shoe, so that children can conveniently adjust the length of the shoe according to the growth requirement of the foot shape, and the shoe is convenient to operate, comfortable, healthy, firm, durable and convenient to produce.

The application provides a length-adjustable telescopic shoe, which comprises a sole and a vamp, wherein the sole comprises a sole part, a telescopic piece and a heel part, and the sole part and the heel part are connected through the telescopic piece; the telescopic piece comprises a first telescopic part, a second telescopic part and a fixing bolt, and when the telescopic amount of the telescopic piece is adjusted, the first telescopic part slides in the second telescopic part; the first telescopic portion is provided with a fixing tooth in limit fit with the fixing bolt, and the second telescopic portion is provided with a first through hole for the fixing bolt to penetrate through.

Furthermore, the sole portion is provided with a first groove portion for fixing the first telescopic portion, and the heel portion is provided with a second groove portion for fixing the second telescopic portion.

Furthermore, a plurality of reinforcing ribs arranged along the length direction of the first telescopic part are arranged on the front surface of the first telescopic part, and a plurality of gear clamping teeth extending along the width direction of each reinforcing rib are arranged on each reinforcing rib; the front surface of the first telescopic part is also provided with a stopping part, the stopping part is positioned on one side of the reinforcing rib far away from the cavity, and the stopping part is aligned with the area between the reinforcing ribs; the back of the first telescopic part is provided with a T-shaped sliding chute;

a plurality of groove parts aligned with the reinforcing ribs are arranged on the inner wall of the cavity of the second telescopic part, a convex part is arranged between every two groove parts, and the stopping part is aligned with the convex part; the groove part is provided with a convex part; a T-shaped clamping head is arranged on the side wall of one side, opposite to the groove part, of the second telescopic part;

when the reinforcing rib slides along the groove part, the convex part continuously changes the concave area between the gear clamping teeth, and meanwhile, the T-shaped clamping head slides in the T-shaped sliding groove to realize gear adjustment.

Further, the fixing bolt comprises a bolt sleeve and a bolt body,

an annular groove is formed in the first end of the bolt sleeve and is clamped with a bayonet on the side face of the second telescopic part; a surrounding bulge is arranged at the second end of the bolt sleeve; the bolt sleeve is provided with a through hole for the bolt body to pass through, and the inner wall of the through hole is provided with a plurality of bulges;

the bolt body comprises a cap part and a rod part, a surrounding flange is arranged on the rod part, and the contour of the tail end of the rod part is matched with the contour of the fixed teeth; the cap part is provided with a groove, and the contour of the groove is matched with the contour of the cross section of the plug sleeve;

when the bolt body is completely inserted into the bolt sleeve, the part of the second end of the bolt sleeve above the surrounding convex part enters the inner part of the groove.

Furthermore, the back surface of the first telescopic portion is provided with a transversely extending anti-overflow flange, the anti-overflow flange is positioned between the T-shaped sliding groove and a head area of the first telescopic portion, and the head area is positioned in a first groove portion of a sole portion.

Further, the side wall of the T-shaped clamping head arranged on the second telescopic part is provided with a protruding edge, the thickness of the protruding edge is larger than that of the side wall, the outline of the protruding edge is the same as the outline of the edge of the second groove part of the heel part and the outline of the anti-overflow flange, and the protruding edge abuts against the edge of the second groove part to prevent glue from overflowing.

Furthermore, a gear adjusting clamping groove is formed in the front face of the first telescopic part, a plurality of clamping teeth are arranged in the gear adjusting clamping groove, and a clamping head in sliding fit with the clamping teeth is arranged on the second telescopic part;

the front side or the back side of the first telescopic part is provided with a plurality of reinforcing ribs extending along the length direction, and the thickness of each reinforcing rib is matched with that of the cavity in the second telescopic part.

Further, the first telescopic portion is located in the first groove portion.

Further, the vamp has telescopic elasticity so as to match the length change of the telescopic piece.

Further, the telescopic sheet is made of TPU materials.

Optionally, the fixing bolt comprises a bolt sleeve and a bolt body, wherein the bolt sleeve comprises a sleeve column and a clamping joint, the sleeve column is provided with an inner through hole for the bolt rod to pass through, and a bearing part is arranged on the inner wall of the inner through hole; the clamping joint is clamped with the clamping part on the side surface of the second telescopic part; the bolt body comprises a bolt rod and a bolt cap, the bolt rod comprises a connecting part, a protruding part and a wedge-shaped head part, the bolt cap is detachably connected with the connecting part of the bolt rod, the protruding part is clamped with the bearing part, the width of the wedge-shaped head part is equal to the width of the side face of the second telescopic part, and the width of the wedge-shaped head part is larger than the width of the bolt rod and the width of the inner through hole; the bottom of the clamping portion on the side face of the second telescopic portion is provided with a wedge-shaped groove for accommodating the wedge-shaped head.

To sum up, the length-adjustable's that this application embodiment provided flexible shoes have following advantage:

(1) the operation is convenient and fast: the fixing bolts on the side faces of the shoe soles can be pulled out, the shoe soles are pulled to adjust the size of the shoe soles and the wrapping tightness of the shoe uppers, and the fixing bolts are pressed down and fixed after the adjustment is completed, so that the length adjustment of the shoes is completed.

(2) Scalable bottom surface: the maximum stretching limit of the sole and the vamp can reach more than 5mm, and a plurality of gears can be adjusted to meet the requirements of the foot shapes of children at different ages.

(3) Comfort and health: the outsole is made of MD materials and TPU flexible pieces, the vamp is made of elastic environment-friendly screen cloth, and the use period is effectively prolonged while the wearing comfort is guaranteed.

(4) Environmental protection and energy conservation: the telescopic shoes with adjustable use lengths can prolong the service life of the shoes, more than 2 pairs of shoes can be saved every year by people, the cost can be saved, and the telescopic shoes are environment-friendly and energy-saving.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a three-sided view of the sole of a length-adjustable telescopic shoe according to a first embodiment of the present application;

FIG. 2 is a front perspective view of the sole of the adjustable length telescopic shoe according to the first embodiment of the present application;

FIG. 3 is a block diagram of a telescoping member of the adjustable length telescoping shoe provided in accordance with the first embodiment of the present application;

FIG. 4 is a schematic view of the extension member of the length-adjustable retractable shoe according to the first embodiment of the present application in a separated state and an inserted state;

FIG. 5 is an isometric view of a telescoping member of a length-adjustable telescopic shoe provided in accordance with a second embodiment of the present application;

FIG. 6 is a perspective view of a second expansion portion of a length-adjustable expansion shoe according to a second embodiment of the present application;

FIG. 7 is an isometric view of a stud sleeve of a securing stud of a telescoping member of the adjustable length telescoping shoe according to a second embodiment of the present application;

FIG. 8 is an isometric view of the shank of the retaining pin of the expansion member of the adjustable length expansion shoe according to a second embodiment of the present application;

FIG. 9 is a side view and a perspective view of a second expansion member of the adjustable length expansion shoe according to the third embodiment of the present application;

FIG. 10 is a plan view and a perspective view of a pin sleeve of a fixing pin of the telescopic shoe whose length is adjustable according to a third embodiment of the present application;

fig. 11 is an exploded perspective view of a fixing bolt of a telescopic shoe with adjustable length according to a third embodiment of the present invention.

100-retractable shoes; 101-elastic vamp; 102-a retractable sole; 103-sole part; 104-heel part; 105-a telescoping member; 106-a first telescoping section; 107-a second telescoping section; 108-a first groove portion; 109-a second recess portion; 110-a dead bolt; 111-reinforcing ribs; 112-the connection point of the chuck and the second telescopic part; 113-a plug body; 114-stationary teeth; 115-gear adjusting clamping groove; 116-a chuck; 117-first snap-in part; 118-a second snap-in portion; 119-bolt sleeve; 120-a first via; 121-a stop; 122-gear latch; a 123-T-shaped chuck; 124-groove part; 125-spill-proof flange; 126-a T-shaped chute; 127-a projection; 128-bayonet; 129-a via hole; 130-a boss; 131-end faces of the projections; 132-an annular groove; 133-encircling the boss; 134-a second via; 135-a groove; 136-a cap; 137-terminal end; 138-a shaft portion; 139-head region; 140-a cavity portion; 141-raised edges; 142-a snap-fit portion; 143-wedge groove; 144-a plug sleeve; 145-casing column; 146-an internal through hole; 147-a bolster; 148-a key body; 149-bolt cap; 150-a pin; 151-end; 152-boss.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that although the terms first, second, third, etc. may be used to describe the acquisition modules in the embodiments of the present invention, these acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.

The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.

Example one

Referring to fig. 1-4, the structure and method of use of the length adjustable expansion shoe will be described in detail. The length-adjustable retractable shoe 100 of this embodiment is composed of an elastic upper 101 and a retractable sole 102, wherein the elastic upper 101 is made of high-elastic EVA, elastic mesh material, etc., and when the sole 102 is retracted, the upper 101 can flexibly extend following the extension amount of the sole 102.

The telescopic sole is the main technical area of the invention. The sole 102 includes a sole portion 103, an expansion member 105, and a heel portion 104, the sole portion 103 and the heel portion 104 being connected by the expansion member 105. The telescopic member 105 comprises a first telescopic part 106, a second telescopic part 107 and a fixed bolt 110, and when the telescopic amount of the telescopic member 105 is adjusted, the first telescopic part 106 slides in the second telescopic part 107; the first telescopic part 106 is provided with a plurality of fixing teeth 114 which are in limit fit with the fixing bolts 110, and the second telescopic part 107 is provided with a first through hole 120 through which the fixing bolt 110 passes.

Preferably, the extensible member 105 is a drawer-type sheet structure, wherein the first extensible part 106 and the second extensible part 107 are both in a sheet shape, and the first extensible part 106 is telescopically nested in the second extensible part 107.

Further, in order to better fix the expansion piece 105 to the sole 102, a first groove portion 108 and a second groove portion 109 are provided in the sole portion 103 and the heel portion 104, respectively. Preferably, the first flexible portion 106 is fixed to the first recess portion 108 by, but not limited to, gluing, and the second flexible portion 107 is fixed to the second recess portion 109 by, but not limited to, gluing. In order to improve the user's feeling when wearing, the first and second

stretchable parts

106 and 107 are covered with a fabric buffer layer after being adhered in the recessed parts, so that the stretchable member 105 is not exposed to the outside, and the user's sole does not feel uncomfortable by directly touching the stretchable member 105.

The present embodiment does not limit the recess portion to which the first telescopic portion 106 and the second telescopic portion 107 are fixed, and theoretically, the first telescopic portion 106 and the second telescopic portion 107 can be fixed in any of the two recess portions to achieve the technical effect of freely extending and retracting, but the position of the fixing bolt 110 needs to be matched with the position change of the first telescopic portion 106. Since the heel portion has a large thickness and the fixing pin 110 is preferably provided, it is more practical to fix the first expansion portion 106 and the second expansion portion 107 to the first groove portion 108 and the second groove portion 109.

Further, although the fixing bolt 110 (latch) itself can function as a detent to stop the length of the telescopic member 105 at a proper position, the user cannot intuitively feel the adjusted length of the telescopic member 105, i.e., the user does not know whether the telescopic amount of the telescopic member 105 is proper or not. In order to solve the above technical problem, in the present embodiment, it is more preferable that a gear adjustment catch 115 is provided on the first telescopic part 106, and a chuck 116 engaged with the gear adjustment catch 115 is provided on the second telescopic part 107. The gear adjusting slot 115 may be formed by a slot body and a plurality of protruding portions, a tooth-shaped recessed area formed by the two protruding portions is used for accommodating the chuck 116, and in addition, the edges at the two ends of the slot body may also form an area for stopping the chuck 116. For example, two adjacent protrusions are arranged in the elongated slot body, the first end of the slot body is a first gear, the recessed area clamped by the two protrusions is a second gear, and the second end of the slot body is a third gear. When the user adjusts the extension lengths of the first and second

telescopic parts

106 and 107, the chuck 116 slides over the protruding part and the two ends of the groove body of the gear adjusting slot 115, and the user can intuitively feel different gears.

Furthermore, in order to facilitate the insertion of the fixing peg 110 from the outside of the sole to the inside of the telescopic element, a through hole is provided in the lateral region of the heel 104 of the sole 102 for the fixing peg 110 to pass through. More preferably, the fixing bolt 110 comprises a bolt body 113 and a bolt sleeve 119, one end of the bolt sleeve 119 is fixed on the second telescopic part 107, for example, it can be realized by means of a snap, and the bolt body 113 passes through the bolt sleeve 119 and is clamped with the bolt sleeve 119. In order to better realize the fixation of the bolt body 113 and the bolt sleeve 119, a first clamping portion 117 is arranged on the bolt body 113, a second clamping portion 118 is arranged on the inner wall of the bolt sleeve 119, and the first clamping portion 117 is connected with the second clamping portion 118 in a buckling manner.

Further, in order to realize the drawer-type sheet structure of the first telescopic part 106 and the second telescopic part 107, the thickness of the first telescopic part 106 is often thinner than the thickness of the inner space of the second telescopic part 107, which makes the first telescopic part 106 more prone to be twisted and deformed to be damaged when being pulled out. In order to solve the above technical problem, in this embodiment, a plurality of reinforcing ribs 111 are disposed in the longitudinal direction of the first expansion part 106, and the thickness of the reinforcing ribs 111 is the same as or close to the thickness of the inner space of the second expansion part 107, so that the first expansion part 106 can be kept horizontal without torsional deformation when the first expansion part 106 is drawn.

Example two

Referring to fig. 5-8, another preferred embodiment of the telescoping member 105 is provided. Compared with the structure of the first embodiment, the structure of the extensible member 105 provided by the embodiment is firmer, more stable in extension and retraction, better in operation hand feeling, not easy to damage, and not easy to leak glue. In this embodiment, the parts of the shoe other than the extension member 105 are not substantially changed and will not be described herein.

Specifically, the telescopic member 105 includes a first telescopic portion 106, a second telescopic portion 107 and a fixing bolt 110, and when the telescopic amount of the telescopic member 105 is adjusted, the first telescopic portion 106 slides in the second telescopic portion 107; the first telescopic part 106 is provided with a plurality of fixing teeth 114 which are in limit fit with the fixing bolts 110, and the second telescopic part 107 is provided with a through hole 129 for the fixing bolts 110 to pass through.

Further, the first expansion part 106 is a T-shaped expansion piece, the wider head area of the T-shaped expansion piece is fixed in the first groove 108 of the sole part 103, and the narrower tail area of the expansion piece can be inserted in the second expansion part 107. The narrower tail area of the first surface of the telescopic piece is provided with a plurality of reinforcing ribs 111 along the length direction, preferably two parallel reinforcing ribs 111, the reinforcing ribs 111 protrude out of the surface of the telescopic piece, and the height of the reinforcing ribs is matched with the thickness of the inner cavity of the second telescopic part 107, so that the first telescopic part 106 can be prevented from loosening or breaking due to twisting in the second telescopic part 107.

Further, a plurality of shift notches 122 are provided in the width direction of the reinforcing rib 111, and a recessed area is formed between two shift notches 122, and the recessed area is matched with a protrusion 130 at the entrance of the second expansion part 107 (described in detail below). Although fig. 5 shows two shift position latches 122, the specific number can be set according to the requirement of the actual drawing length, and the embodiment is not limited in particular.

Furthermore, a stopping part 121 parallel to the reinforcing rib 111 is arranged at the upper position of the middle of the two reinforcing ribs 111, the stopping part 121 is a long strip-shaped bulge, and the lower edge of the stopping part is flush with the upper edge of the reinforcing rib 111. When the reinforcement rib 111 is fully inserted into the cavity of the second telescopic part 107, the stopper 121 abuts against the edge of the cavity of the second telescopic part 107, thereby preventing the first telescopic part 106 from being excessively inserted to damage the telescopic member 105.

Furthermore, a T-shaped sliding groove 126 is formed in a proper position of the second surface of the T-shaped telescopic piece, the T-shaped sliding groove 126 is matched with a T-shaped clamping head 123 on the second telescopic portion 107, when the T-shaped telescopic piece is extended, drawn and inserted in the second telescopic portion 107, the T-shaped clamping head 123 slides in the T-shaped sliding groove 126, at the moment, the protruding portions on two sides of the T-shaped clamping head 123 are firmly clamped in the sliding rails on two sides of the T-shaped sliding groove 126 and cannot slide out of the sliding grooves, the accuracy of the extending, drawing and inserting actions is ensured, and the first telescopic portion 106 and the second telescopic portion 107 are prevented from being separated. An anti-overflow flange 125 extending along the width direction of the T-shaped telescopic piece is further provided on the second face of the T-shaped telescopic piece, and the anti-overflow flange 125 is provided at the upper portion of the T-shaped sliding groove 126 and near the head region of the telescopic piece for preventing the glue in the first groove portion 108 of the sole portion 103 from overflowing into the T-shaped sliding groove 126. More preferably, the extension profile of the spill-preventing flange 125 matches the profile of the protruding edge 141 of the head region 139 of the second telescopic part 107 for the T-clamp 123, and the spill-preventing flange 125 abuts against the protruding edge 141 of the second telescopic part 107 when the first telescopic part 106 is fully inserted into the second telescopic part 107.

Further, the second telescopic part 107 comprises a head region 139 and a cavity part 140, the head region 139 is provided with a T-shaped clamp 123, and the head region 139 has a protruding edge 141, the thickness of which is greater than that of the head region 139, so that the protruding edge 141 protrudes out of the surface of the head region 139. The contour of the protruding edge 141 matches the contour of the edge of the second groove 109 of the heel 104, and when the second expansion part 107 is fixed inside the second groove 109, the protruding edge 141 abuts against the edge of the second groove 109, thereby preventing the glue inside the second groove 109 from overflowing. The cavity portion 140 is provided with groove portions 124 aligned with the reinforcing ribs 111, and a convex portion 127 is formed between each two groove portions 124. When the first telescopic part 106 is inserted into and retracted from the cavity 140, the reinforcing rib 111 slides along the groove portion 124 until the stopping portion 121 of the first telescopic part 106 abuts against the protrusion 127.

Further, a protrusion 130 is disposed near an entrance of each groove portion 124, when the reinforcing rib 111 slides along the groove portion 124, the plurality of gear latches 122 on the reinforcing rib 111 rub against the protrusion 130, and the protrusion 130 enters between two gear latches 122 to form a recessed area, so that a user can feel a click sound or vibration for adjusting the telescopic gear obviously, and the user can adjust the telescopic member 105 conveniently. Compared with the first embodiment, in the present embodiment, the gear latches 122 and the protruding portions 130 are respectively disposed in the reinforcing ribs 111 and the groove portions 124, on one hand, the number of the gear latches 122 and the protruding portions 130 can be increased, the operation hand feeling of the user is better, and the wear redundancy is better; on the other hand, the first telescopic part 106 and the second telescopic part 107 can be combined more tightly, so that the first telescopic part 106 is less prone to shaking or twisting in the second telescopic part 107, damage is reduced, and the service life is prolonged.

Further, the side surface of the cavity part 140 of the second telescopic part 107 is provided with a bayonet 128 for clamping the bolt sleeve 119 of the fixing bolt, and the bottom of the bayonet 128 is provided with a through hole 129 for facilitating the passing of the tail end 137 of the bolt body 113 of the fixing bolt.

Referring to fig. 7 and 8, the fixing bolt comprises a bolt sleeve 119 and a bolt body 113.

Wherein, the bolt sleeve 119 is provided with an annular groove 132 which is clamped with the bayonet 128 at a proper position near the first end, and a surrounding convex part 133 which is used for stopping the bolt body 113 is provided at a proper position near the second end. The bolt sleeve 119 is provided with a second through hole 134 for the rod part 138 of the bolt body 113 to pass through, and a plurality of protrusions 118 are arranged on the inner wall of the second through hole 134.

The plug body 113 includes a cap portion 136 and a rod portion 138, wherein the rod portion 138 is provided with a surrounding flange 117, and when the rod portion 138 is inserted into and retracted from the second through hole 134, the surrounding flange 117 slides over the plurality of protrusions 118, so that a blocking feeling is generated for a user, and the operation feeling of the user is improved. At the same time, the protrusions 118 also serve to fix the surrounding flange 117 and prevent the bolt body 113 from falling out.

Furthermore, the cap 136 is further provided with a groove 135 matching with the end shape of the plug sleeve 119, when the plug body 113 is completely inserted, the portion of the second end of the plug sleeve 119 above the surrounding protrusion 133 enters the groove 135, so that the plug body 113 is inserted into the interior of the shoe as deep as possible, and the cap 136 is exposed out of the shoe as little as possible.

Further, for the combining strength of the groove 135 of the cap 136 and the end surface of the plug sleeve 119, the protruding edge 139 is arranged on the portion of the second end of the plug sleeve 119 above the surrounding protrusion 133, and due to the existence of the protruding edge 139, the combining strength of the plug body 113 and the plug sleeve 119 is stronger, and the plug body 113 is less prone to be loosened.

Further, the distal end 137 of the post 138 is wedge-shaped or otherwise shaped to mate with the stationary teeth 114.

EXAMPLE III

Since the end 137 of the bolt body 113 of the fixing bolt in the second embodiment is in a wedge shape matching with the fixing teeth 114, but since the size of the end 137 is similar to that of the fixing teeth 114 (i.e., the end 137 is relatively thin), when a person presses the sole with his foot, the first telescopic part 106 and the second telescopic part 107 are deformed to some extent, at this time, a certain offset occurs between the fixing teeth 114 and the end 137, the end 137 is easily separated from the fixing teeth 114, and the first telescopic part cannot be fixed by the fixing bolt. In order to overcome the above problems, the present embodiment further improves the structure of the fixing bolt on the basis of the second embodiment, and other structures are the same as those of the first and second embodiments, and are not described again in this embodiment.

Referring to fig. 9-11, the fixing bolt of the present embodiment includes a bolt sleeve 144 and a bolt body 148, and a clamping portion 142 matching with the bolt sleeve 144 is provided at a side portion of the second telescopic portion 107.

As shown in fig. 11, in order to prevent the tapered end of the bolt from escaping from the fixed teeth, the bolt 148 of the present embodiment is designed to include a bolt rod 150, a bolt cap 149, a boss 152 and an end 151. Wherein the end 151 is provided with a wedge-shaped head having a width greater than the width of the bolt 150 and having a width equal to or close to the width of the side of the second telescoping part 107. The reason for this is that, because the first telescopic part 106 needs to slide in the second telescopic part 107 in a telescopic manner, the width of the fixing teeth 114 on the first telescopic part 106 is inevitably smaller than the width of the side face of the second telescopic part 107, and therefore the width of the fixing teeth 114 is also inevitably smaller than the width of the wedge-shaped head, and at this time, no matter how the second telescopic part is deformed by the pressure of the sole, the wedge-shaped head at the end 151 of the bolt body 148 cannot be separated from the fixing teeth, thereby ensuring the fixing of the fixing bolt on the first telescopic part.

Further, since the width of the wedge-shaped head is greater than the width of the bolt 150 and necessarily greater than the width of the inner through hole 146 of the sleeve 145 of the bolt sleeve 144, it is necessary to redesign the installation structure of the bolt sleeve 144 and the bolt body 148. Specifically, the method comprises the following steps:

referring to fig. 10, the plug sheath 144 of this embodiment has a stepped snap head that mates with a stepped snap portion 142 on the side of the second telescoping section 107, which is removably attached to the snap portion 142. The inner wall of the inner through hole 146 of the sleeve 145 of the bolt sleeve 144 is provided with a bearing 147 matched with the boss 152, when the bolt body stretches and draws in the bolt sleeve, the boss 152 and the bearing 147 can play a role in positioning the bolt rod 150, so that the bolt rod 150 cannot be loosened when being completely inserted into the bolt sleeve 144.

Referring to fig. 9, at the end of the clamping portion 142, there is a wedge-shaped slot 143, and the wedge-shaped slot 143 is used for accommodating the wedge-shaped head of the end 151, and the wedge-shaped slot 143 also serves as a positioning function for the wedge-shaped head of the end 151.

Referring to FIG. 11, the bolt 150 and the bolt cap 149 are designed to be removably connected, preferably, the head of the bolt 150 has external threads that mate with the internal threads of the bolt cap 149.

When the fixing bolt is installed, the head of the bolt rod 150 firstly passes through the inner through hole 146 of the bolt sleeve 144, then the step-shaped clamping joint of the bolt sleeve 144 is placed in the step-shaped clamping joint part 142 on the side surface of the second telescopic part 107, and then the bolt cap 149 is in threaded connection with the head of the bolt rod 150, so that the integral installation of the fixing bolt is realized. When the user uses the plug 150, the plug 150 is completely inserted into the plug sleeve 144 by pressing the head of the plug 150, and at this time, the wedge-shaped head of the end 151 is located in the wedge-shaped groove 143, and the protruding portion 152 and the receiving portion 147 are firmly clamped, so that the telescopic length of the first telescopic portion 106 is fixed. When the fixing of the fixing bolt to the first telescopic part 106 is released, the user only needs to lift the head of the bolt rod 150, so that the boss 152 and the socket 147 are released, and the wedge-shaped head of the end 151 is also released from the wedge-shaped groove 143, at this time, the telescopic length of the first telescopic part 106 can be freely adjusted.

Further, the cap 149 has a straight or cross-shaped slot for removal of the cap 149.

It should be noted that in this embodiment, the width of the wedge-shaped head of the end 151 of the bolt 150 is designed to be greater than the width of the bolt 150, greater than the width of the inner through hole 146 of the sleeve 145 of the bolt sleeve 144, and equal to or close to the width of the side surface of the second telescopic part 107, so as to ensure that the fixing bolt and the fixing teeth 114 are not loosened by itself due to the pressure of the sole, ensure that the user of the shoe does not pull out the fixing bolt completely due to misoperation, and improve the reliability of the retractable shoe.

The length-adjustable telescopic shoe provided by the invention has the advantages that the length of the shoe can be adjusted by utilizing the structural principle of the telescopic sheet, the structure is simple, the design is ingenious, the operation is easy, the production is convenient, the stability is high, the shoe is safe and healthy, and the shoe is suitable for children of different ages. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a length-adjustable's flexible shoes, includes sole and vamp, its characterized in that:

the sole comprises a sole part, an expansion piece and a heel part, and the sole part and the heel part are connected through the expansion piece; the telescopic piece comprises a first telescopic part, a second telescopic part and a fixing bolt, and when the telescopic amount of the telescopic piece is adjusted, the first telescopic part slides in the second telescopic part; the first telescopic portion is provided with a fixing tooth in limit fit with the fixing bolt, and the second telescopic portion is provided with a first through hole for the fixing bolt to penetrate through.

2. The retractable shoe with adjustable length of claim 1, wherein the sole portion is provided with a first recess portion for securing a first retractable portion, and the heel portion is provided with a second recess portion for securing a second retractable portion.

3. A length-adjustable telescopic shoe according to claim 2, characterized in that:

the front surface of the first telescopic part is provided with a plurality of reinforcing ribs arranged along the length direction of the first telescopic part, and each reinforcing rib is provided with a plurality of gear latches extending along the width direction of the reinforcing rib; the front surface of the first telescopic part is also provided with a stopping part, the stopping part is positioned on one side of the reinforcing rib far away from the cavity, and the stopping part is aligned with the area between the reinforcing ribs; the back of the first telescopic part is provided with a T-shaped sliding chute;

4. A length-adjustable telescopic shoe according to claim 3, characterized in that:

the fixing bolt comprises a bolt sleeve and a bolt body,

5. A length-adjustable telescopic shoe according to claim 3, characterized in that:

the back of first flexible portion is provided with the anti-overflow flange of horizontal extension, the anti-overflow flange is located T shape spout with between the head region of first flexible portion, the head region is located the first concave part of sole portion.

6. A length-adjustable telescopic shoe according to claim 5, characterized in that:

the side wall of the T-shaped clamping head arranged on the second telescopic part is provided with a protruding edge, the thickness of the protruding edge is larger than that of the side wall, the outline of the protruding edge is the same as the outline of the edge of the second groove part of the heel part and the outline of the anti-overflow flange, and the protruding edge abuts against the edge of the second groove part to prevent glue from overflowing.

7. A length-adjustable telescopic shoe according to claim 1, characterized in that:

a gear adjusting clamping groove is formed in the front face of the first telescopic part, a plurality of clamping teeth are arranged in the gear adjusting clamping groove, and a clamping head in sliding fit with the clamping teeth is arranged on the second telescopic part;

8. A length adjustable retractable shoe according to claim 2, wherein said first retractable portion is located within said first recess portion.

9. A length-adjustable telescopic shoe according to any one of claims 1 to 8,

the shoe upper has a stretchable elasticity to match the length change of the stretchable member.

10. A length-adjustable telescopic shoe according to claim 3, characterized in that:

the fixing bolt comprises a bolt sleeve and a bolt body, wherein,

the bolt sleeve comprises a sleeve column and a clamping joint, the sleeve column is provided with an inner through hole for the bolt rod to pass through, and the inner wall of the inner through hole is provided with a bearing part; the clamping joint is clamped with the clamping part on the side surface of the second telescopic part;

the bolt body comprises a bolt rod and a bolt cap, the bolt rod comprises a connecting part, a protruding part and a wedge-shaped head part, the bolt cap is detachably connected with the connecting part of the bolt rod, the protruding part is clamped with the bearing part, the width of the wedge-shaped head part is equal to the width of the side face of the second telescopic part, and the width of the wedge-shaped head part is larger than the width of the bolt rod and the width of the inner through hole;

the bottom of the clamping portion on the side face of the second telescopic portion is provided with a wedge-shaped groove for accommodating the wedge-shaped head.