Snowshoe frame structure and snowshoe

Abstract

A shoe frame structure for snowshoes and the snowshoes thereof, comprising a shoe frame structure, a shoe upper, shoe teeth and a shoe upper, characterized in that: the shoe frame body is an annular shoe frame or an annular shoe frame with a partial opening made of a metal pipe with a main body cross-section of a triangular cross-section, the shoe frame has at least an upward-curved front end, a substantially horizontal middle portion, and a horizontal or upward-curved rear end, the upper end surface of the shoe frame is a mounting surface for mounting and fixing the shoe upper, the lower end of the shoe frame is substantially in the shape of a triangular tip, and a plurality of side teeth for increasing the anti-slip effect are arranged at intervals at the bottom of the triangular tip structure at the lower end of the shoe frame. The present invention has a simple and reasonable structure, is not only light in weight and easy to carry, but also has high strength and is firmly and stably mounted, making walking on snow easy, safe and anti-slip, and is suitable for use by snow sports enthusiasts.

Description

Technical Field

[0001] The present invention relates to an outdoor sports article, in particular to a shoe frame structure of a snowshoe and related snowshoes. Background Art

[0002] Snowshoes, also known as snow paws, bear paw shoes, snowshoes, and snow boots, are footwear used for walking on snow. By distributing the body's weight over a larger area, they prevent the foot from sinking completely into the snow. Traditional snowshoes are made of a hardwood frame woven with rawhide leather straps, making them cumbersome and prone to falling. Existing snowshoes mostly use light metal frames, while others are made of a single piece of plastic with straps. While these are relatively lightweight, they suffer from poor slip resistance and can be prone to falls when hiking in the snow.

[0003] Upon investigation, Chinese Patent No. 2013207248668 discloses a snowshoe comprising a frame and a covering panel stretched across the frame. The frame has a strip-shaped, circumferential sidewall oriented transversely to the horizontal. The frame is characterized by a support surface arranged circumferentially for securing the covering panel, the support surface being integrally formed with the sidewall. The frame, sidewall, and support surface are formed from a single strip or sheet of material by folding the edges of the strip or sheet. Consequently, the frame is relatively heavy, making it difficult to carry and use, resulting in high raw material costs. The frame's strength and support are weak for a given weight, and the sidewalls lack sufficient ice and snow breaking capability. Furthermore, securing the frame to the upper is difficult, typically requiring specialized connectors, complicating installation and hindering upper assembly. Furthermore, since the frame's cross-section remains essentially constant, it cannot adapt to changes in ice thickness, preventing it from self-adjusting. Similar problems also exist in the Chinese patent No. 200480003338.7 "Frame and buckle for snowshoes and related systems and methods".

[0004] Another Chinese patent, patent number 2015204682531, discloses a snowshoe comprising a main body composed primarily of a front shoe member made of plastic and a rear shoe frame made of metal, the front shoe member and the rear shoe frame being fixedly connected by one or more connecting members. Because the present invention utilizes a front shoe member made of plastic and a rear shoe frame made of metal to form the main body of the snowshoe, it avoids the need for an all-aluminum alloy for the entire main body, thus reducing production costs. Furthermore, because the rear shoe frame of the main body is made of metal, the quality of the snowshoe is enhanced. Its shortcoming is that it uses traditional circular cross-section pipes. Although the weight is reduced and the frame strength is increased compared to the previous frame, which is convenient for carrying and use, the circular cross-section makes it very difficult to install and fix the upper on the circular cross-section frame. Usually, connectors are required, which complicates the production and is not conducive to the fixed assembly of the upper. It is further difficult to fix the side teeth on the shoe frame and the firmness is not good enough. In addition, the ice and snow breaking ability of the snowshoes is not ideal, and therefore the structure needs further improvement. Summary of the Invention

[0005] The primary technical problem to be solved by the present invention is to provide a shoe frame structure for snow boots with a simple and reasonable structure, low dragging friction, strong gripping ability, improved snow-walking stability, and convenient installation and fixation of the upper and side teeth in response to the above-mentioned technical status quo.

[0006] Another technical problem to be solved by the present invention is to provide a snow boot with a simple and reasonable structure, low dragging friction, strong gripping ability, improved snow-walking stability, and convenient installation and fixation of the upper and side teeth in response to the above-mentioned technical status quo.

[0007] The technical solution adopted by the present invention to solve the above-mentioned primary technical problem is: a shoe frame structure for snow boots, characterized in that: the shoe frame body is an annular shoe frame or an annular shoe frame with a partial opening made of a metal pipe with a triangular cross-section, at least the front end of the shoe frame is upturned, the middle part is basically horizontal, and the tail part is horizontal or upturned, the upper end surface of the shoe frame is a mounting surface for mounting and fixing the shoe upper, the lower end of the shoe frame is basically in the shape of a triangular tip, and a plurality of side teeth for increasing the anti-slip effect are arranged at intervals at the bottom of the triangular tip structure at the lower end of the shoe frame.

[0008] Preferably, the metal tube with a triangular cross-section is made into a one-stage structure with an opening at the rear end, and a tail connector is fixedly connected to the opening position at the rear end of the frame to form an annular shoe frame; or, the metal tube with a triangular cross-section is made into a one-stage structure with an opening at the rear end, and the opening position is connected by welding to form an annular shoe frame; or, the metal tube with a triangular cross-section is made into a left and right two-stage structure, and the head and tail of the left and right sections are connected by an inner lining tube to form an annular shoe frame; or, the metal tube with a triangular cross-section is made into a left and right two-stage structure, and the head and tail of the left and right sections are connected by a head connector and a tail connector to form an annular shoe frame; Alternatively, the metal tube with a triangular cross-section is made into a left and right two-section structure, the heads of the left and right sections are welded together, and the tails are connected by a tail connector to form an annular shoe frame, or the metal tube with a triangular cross-section is made into a head and tail two-section structure, the middle connecting parts of the head and tail sections are connected by an inner lining pipe sleeve to form an annular shoe frame; or the metal tube with a triangular cross-section is made into a head and tail two-section structure, the middle connecting parts of the head and tail sections are connected by left and right connectors to form an annular shoe frame; or the metal tube with a triangular cross-section is made into a head and tail two-section structure, the middle connecting parts of the head and tail sections are connected by welding to form an annular shoe frame.

[0009] More preferably, the tail connector is a V-shaped structure or a U-shaped structure with an arc transition shape, and the tail connector is arranged at the rear end opening position of the shoe frame by plugging, screwing, riveting or welding to form a ring-shaped shoe frame.

[0010] Furthermore, both ends of the tail connector are provided with plug-in parts that cooperate with the triangular holes of the metal pipe with a triangular cross-section at the opening of the shoe frame. The tail connector is fixed to the rear end of the shoe frame through size matching, and the middle part of the upper end surface of the tail connector is provided with a first connecting part that is riveted or screwed to the rear end of the shoe upper.

[0011] It is further preferred that the metal pipe with a triangular cross-section has a cross-section of an isosceles triangle or a right triangle. When the cross-section is an isosceles triangle, the bottom side serves as the upper end face of the shoe frame, the top angle serves as the lower end of the shoe frame, and the side teeth are arranged on the top angle end. When the cross-section is a right triangle, one of the right-angled sides serves as the upper end face of the shoe frame, the acute angle of the other right-angled side serves as the lower end of the shoe frame, the right-angled side serves as the inner side face of the shoe frame, and the side teeth are arranged on the inner side face of the shoe frame, or the downward extending section of the right-angled side constitutes a side tooth integrated with the shoe frame.

[0012] Furthermore, the side teeth are distributed between the head bending end and the rear bending end of the shoe frame, and the side teeth are fixed together with the shoe frame by screw connection, riveting connection, welding connection or integral molding.

[0013] Furthermore, a rear tooth part is installed on the shoe frame, and the rear tooth part includes a horizontal metal plate, the bottom of the horizontal metal plate is formed with bottom teeth, and side flanges extend on the left and right sides of the horizontal metal plate. The side flanges are fixed to the inner wall of the shoe frame by screw connection, riveting connection or welding connection.

[0014] Finally, the side teeth are composed of two front and rear sections that are symmetrically arranged on the left and right, namely the first side teeth and the second side teeth. The first side teeth of the front section include a metal plate, the upper part of the metal plate is folded inward or directly aligned with the bottom of the shoe frame, and side teeth are formed at the bottom of the metal plate. The second side teeth of the rear section are an integral part of the rear teeth, the upper end of the side flange of the rear teeth is folded inward or directly aligned with the bottom of the shoe frame, and side teeth are formed at the bottom.

[0015] The technical solution adopted by the present invention to solve the above-mentioned technical problem is: a snow boot, which includes a shoe frame, a shoe upper, shoe teeth and a shoe upper, and the shoe teeth are installed and fixed on the shoe frame to form a shoe frame structure, which is characterized in that the shoe frame structure adopts any one of the shoe frame structures described above.

[0016] Furthermore, the upper is fixed to the upper end of the shoe frame by riveting or screwing. The upper adopts a composite hard plastic base plate and soft plastic panel or other materials such as a kayak mask, etc. A heel pedal is fixed to the rear of the upper by riveting or screwing, and a lifting device is provided on the heel pedal.

[0017] Furthermore, the lifting device includes a support rod, which is a U-shaped metal rod bent downward on both sides. The rear cross bar of the support rod is a corrugated cross bar. A heel pedal is provided on the shoe upper. Positioning slots are provided on the left and right sides of the shoe upper for the two ends of the support rod to pass through and lift and position. The two ends of the support rod pass downward through the positioning slots and are directly or indirectly connected to the rear gear part fixed horizontally on the shoe frame.

[0018] Furthermore, the back of the rear tooth part is riveted, screwed or welded with a U-shaped metal plate as a connecting plate, and axial holes are provided on the left and right sides of the connecting plate. The ends of the bent ends on the left and right sides of the support rod are bent inward to form connecting short shafts that cooperate with the axial holes and rotate. The support rod passes through the axial holes and is rotatably connected to the connecting plate through the connecting short shafts on both sides.

[0019] Furthermore, the heel pedal is a plastic part, the heel pedal and the upper are an integral part, or the heel pedal is fixed to the upper by riveting or screwing, and the upper surface of the heel pedal is formed with a plurality of convex strips for easy pedaling.

[0020] Furthermore, a front tooth piece is also installed on the shoe frame, and a hollow portion is provided on the shoe upper corresponding to the position of the front tooth piece. The surface of the front tooth piece is fixed to the front bottom of the shoe upper by rivets or screws. The main body of the front tooth piece is a metal plate, and the first front teeth and the second front teeth are bent and pressed out at the front and back of the metal plate respectively, and a mounting sleeve hole is formed between the front tooth piece and the bottom of the shoe upper. There is also a metal cross bar, and an axle sleeve is sleeved in the middle of the metal cross bar. Correspondingly, the axle hole is opened on the overlapping part of the side tooth piece and the shoe frame, and the front tooth piece is rotatably connected to the shoe frame through the axle sleeve and the metal cross bar.

[0021] Furthermore, the shoe upper has a strap structure, which includes a treading part, a strap and a buckle. The treading part is located at the bottom of the shoe upper corresponding to the front position of the shoe upper. A stopper is convexly provided at the middle of the front end of the treading part to prevent the shoe from moving forward. A first perforated part is provided on the stopper. Left and right upper connecting pieces are respectively distributed on the left and right sides of the front of the treading part, and left and right heel strap connecting pieces are arranged on the left and right sides of the rear of the treading part. Among them, the upper connecting piece and the heel strap connecting piece on the inner side of the treading part are respectively provided with a second perforated piece and a third perforated piece, and the upper connecting piece and the heel strap connecting piece on the outer side of the treading part are respectively provided with front and rear two perforated pieces. The buckle for locking or loosening the straps includes two straps, one end of the first strap is fixed on the outer upper connecting piece of the treading part, and the other end of the first strap passes through the first perforated piece on the block forward, then folds back backward, passes through the second perforated piece of the inner upper connecting piece, then folds back outward, and passes through the front buckle for locking; one end of the second strap is fixed on the third perforated piece of the heel strap connecting piece on the inner side of the treading part, and the other end of the second strap passes outward through the rear buckle for locking. The two straps are connected together after passing through the buckles to form a handle, and a drawstring is connected between the two buckles for loosening or locking the two straps.

[0022] Furthermore, the buckle is composed of a buckle body and a pressure plate. A notch is recessed at the upper end of the buckle body, and a baffle is laterally provided at the upper end of the notch. Axle holes are symmetrically provided in the middle of both sides of the notch. The lower end of the pressure plate is a second connection part rotatably connected to the buckle body. A through hole corresponding to the axle hole is laterally provided on the second connection part. The lower end of the pressure plate is rotatably connected to the buckle body through a connecting shaft with a torsion spring. The strap passes through the baffle from the inner side of the second connection part of the pressure plate and then extends out of the buckle body from the other side of the baffle. A tooth-like structure that contacts the strap is laterally convex on the inner side of the second connection part. A connecting hole is provided at the upper end of the pressure plate. The two ends of the pull rope are respectively connected to the upper ends of the pressure plates of the two buckles. By pulling the pull rope, the pressure plate is driven to rotate, thereby realizing that the tooth-like structure is tightly against the strap or loosened from the strap.

[0023] Furthermore, the connecting hole is opened transversely in the middle of the upper end of the pressure plate, and the second connecting part of the lower end of the pressure plate is a cam-shaped structure, the outer side of which is a smooth arc surface, and the tooth structure of the inner side is a plurality of strip-shaped convex teeth arranged transversely at intervals.

[0024] Furthermore, the treading part is a plastic part, and the rear end of the treading part is connected to the left heel strap and the right heel strap, wherein the rear end of the left heel strap passes through the positioning hole on the rear root connecting piece of the treading part, so that its front end is fixedly connected to the second strap, and a rivet hole is provided at the lower end of the buckle body of the buckle, the front buckle is riveted and fixed to the corresponding front outer shoe upper connecting piece, the front end of the right heel strap is riveted and fixed to the outer heel connecting piece, and the lower end of the rear buckle is riveted and fixed to the front end of the right heel strap.

[0025] Furthermore, the left heel strap is provided with a plurality of positioning buckles, and the right heel strap is provided with a plurality of positioning holes, and the left heel strap and the right heel strap can be connected together by adjusting the tightness thereof through the cooperation of the positioning buckles and the positioning holes, or the left heel strap is provided with a plurality of positioning holes, and the right heel strap is provided with a plurality of positioning holes, and the left heel strap and the right heel strap can be connected together by adjusting the tightness thereof through the cooperation of the positioning buckles and the positioning holes.

[0026] Finally, the free ends of the first strap and the second strap are respectively provided with buckles or rivets for matching, and the two straps are connected together through the buckles or rivets after passing through the buckles.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] 1. The shoe frame is made of triangular metal pipes, which are light and strong. The upper end of the shoe frame is the mounting surface, and the upper is fixed to the upper end of the shoe frame by rivets or screws, which is easy to install and firm and stable. The lower end of the shoe frame is triangular, with a small contact area with the ground and low drag friction. The triangular metal pipe is convenient for the installation and fixation of the shoe teeth. It can be directly riveted, screwed or welded without the need for connecting parts. In addition, the depth of the shoe frame penetrating into the ice and snow layer will vary depending on the softness or hardness of the ice and snow, so it can self-adjust the penetration depth to a certain extent, improving the stability of stepping on the snow.

[0029] Second, the side teeth, front teeth and rear teeth are arranged at the bottom of the shoe frame, which increases the anti-slip effect when walking on the snow and is not easy to fall. In addition, the side teeth, front teeth and rear teeth increase the strength of the shoe frame, making it more firm and stable.

[0030] 3. The lifting device uses a support rod, and a positioning slot is provided on the upper of the shoe. When the support rod is in the raised state, it can be quickly positioned, and it is easy to manufacture. The heel pedal can be an integral part of the upper, or fixed to the upper by riveting. The heel pedal serves as a heel pad when walking on flat ground, and serves as a positioning frame for the support rod when climbing.

[0031] Fourth, a first perforated piece of a stopper is provided at the front end of the tread portion, which can not only tighten the back of the foot after putting on the shoes, but also limit the front end of the foot to prevent loosening; front and rear perforated pieces are provided on the inner side of the tread portion, two buckles are provided on the outer side of the tread portion, and two straps are provided, which makes threading the straps simpler and wearing shoes more convenient; after putting on the shoes, just pull the handle to tighten the straps, and when loosening, pull the drawstring to quickly loosen them, which makes taking off the shoes very convenient; the tread portion is fixed to the upper end surface of the front teeth, which increases the force on the front teeth, improves the grip and anti-slip effect when walking on the snow, and is not easy to fall.

[0032] The invention has a simple and reasonable structure, is not only light and easy to carry, but also has high strength, is firmly and stably installed, and is provided with a lifting device, which can lift the heel when climbing, reducing muscle stretching during climbing, and has high strength, firm and stable positioning, and the operation of the straps is more convenient and quick, making it easy to quickly put on and take off shoes. It can meet the requirements of light, safe and non-slip walking on snow, and is convenient for climbing, and is suitable for people who love snow sports. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a snow boot according to embodiment 1 of the present invention;

[0034] Figure 2 for Figure 1 A top view of

[0035] Figure 3 for Figure 1 Exploded view of

[0036] Figure 4 A further breakdown of the snowshoes;

[0037] Figure 5 Schematic diagram of the structure of the button in Example 1 of the present invention;

[0038] Figure 6 for Figure 5 Exploded view of

[0039] Figure 7 This is one of the exploded views of the shoe frame structure according to embodiment 1 of the present invention;

[0040] Figure 8 This is the second exploded view of the shoe frame structure of Example 1 of the present invention;

[0041] Figure 9 This is a three-dimensional diagram of a shoe frame according to embodiment 1 of the present invention;

[0042] Figure 10 This is a three-dimensional exploded view of the shoe frame;

[0043] Figure 11 This is a cross-sectional view of a shoe frame according to embodiment 1 of the present invention;

[0044] Figure 12 This is a three-dimensional diagram of the connection structure between the front gear and the upper;

[0045] Figure 13 This is the second stereoscopic diagram of the connection structure between the front gear and the upper;

[0046] Figure 14 This is one of the three-dimensional exploded views of the connection structure between the front gear and the upper;

[0047] Figure 15 This is the second exploded view of the front gear and upper connection structure;

[0048] Figure 16 This is a structural diagram of a shoe frame according to embodiment 1 of the present invention;

[0049] Figure 17 This is a front view of the shoe frame according to embodiment 1 of the present invention.

[0050] Figure 18 A top view of another shoe frame according to embodiment 2 of the present invention;

[0051] Figure 19 This is a cross-sectional view of another shoe frame according to embodiment 2 of the present invention.

[0052] Figure 20 2 is a top view of another shoe frame according to embodiment 3 of the present invention;

[0053] Figure 21 This is a cross-sectional view of another shoe frame according to embodiment 3 of the present invention. DETAILED DESCRIPTION

[0054] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Example 1

[0055] The snow boots of this embodiment mainly include four parts: a shoe frame 1, a shoe upper 6, shoe teeth and a shoe upper 5. The shoe teeth include a side tooth piece 3, a front tooth piece 9 and a rear tooth piece 8. The side tooth piece 3 and the rear tooth piece 8 are installed on the shoe frame 1 to form a shoe frame structure, wherein:

[0056] The shoe frame structure includes a shoe frame 1 and a tail connector 2, see Figure 7 、 8 The shoe frame 1 is mainly made of a metal pipe with a triangular cross-section, with a rear end opening 11, a substantially horizontal middle portion, and a U-shaped structure with both ends tilted upward. The metal pipe with a triangular cross-section can be made of aluminum alloy, stainless steel, or steel. The tail connector 2 is fixedly connected to the rear end opening of the shoe frame 1 to form a closed ring-shaped shoe frame. The upper end surface of the shoe frame 1 is a mounting surface 13 for mounting the upper 6. The mounting surface 13 is usually flat to facilitate the mounting of the upper 6. The lower end of the shoe frame 1 is a triangular tip, see Figure 11At the bottom of the triangular tip structure at the lower end of the shoe frame 1, a number of side teeth 3 are installed at intervals to increase the anti-slip effect.

[0057] The head of the shoe frame 1 is bent upward at an angle of 15° to 45°, the middle portion of the shoe frame 1 is substantially horizontal, and the tail portion of the shoe frame 1 is bent upward at an angle of 5° to 30°. The head portion of the shoe frame 1 is wider than the tail portion, and the middle portion gradually narrows. The tail connector 2 is a V-shaped or U-shaped structure with a circular arc transition. The cross-sectional shape of the tail connector 2 is substantially consistent with the cross-sectional shape of the metal pipe, so that adjacent portions thereof can transition substantially flush. The tail connector 2 is disposed at the rear end opening 11 of the shoe frame 1 by means of a plug-in connection, a screw connection, a rivet connection, or a welding connection. This embodiment employs a plug-in connection, so that in this embodiment, both ends of the tail connector 2 are provided with protruding plug-in portions 21 that mate with the triangular opening of the triangular cross-sectional metal pipe of the shoe frame 1. The tail connector 2 is plug-in fixed to the rear end of the shoe frame 1 by size matching. A first connecting portion 22 is provided in the middle portion of the upper end surface of the tail connector 2, which is riveted to the rear end of the shoe upper 6. The cross section of the metal pipe with a triangular cross section is preferably an isosceles triangle or a right triangle cross section, with a certain arc transition at the corner tip to avoid injury. This embodiment uses a metal pipe with a right triangle cross section, see Figure 11 , wherein one right-angled side serves as the mounting surface 13 of the shoe frame 1, and the acute angle 14 of the other right-angled side serves as the lower end of the shoe frame 1, and the side teeth 3 are fixed on the inner side of the right-angled side 15 of the acute angle 14. The side teeth 3 are distributed between the head bent end and the rear bent end of the shoe frame 1, and the lower end of the side teeth 3 has a tooth-like structure with a pointed tip and high and low intervals. The side teeth 3 can be fixed to the inner side surface of the shoe frame 1 by welding, screwing or riveting, and connected to the inner side surface of the shoe frame 1 to form an integrated structure. In this embodiment, the side teeth 3 are divided into a front first side tooth 30 and a rear second side tooth 31. The front first side tooth 30 and the rear second side tooth 31 are symmetrically installed on both sides of the shoe frame 1, and the front first side tooth 30 and the rear second side tooth 31 are arranged one in front of the other on one side of the shoe frame. The vertical right-angled sides of the triangular metal tube of the shoe frame 1 are provided with mounting holes 12 for facilitating riveting the side teeth 3 , namely the front first side teeth 30 and the rear second side teeth 31 , to the inner side surface of the shoe frame 1 .

[0058] like Figures 7 and 8The rear toothed member 8 is laterally fixedly disposed between the middle and rear inner walls of the shoe frame 1. The rear toothed member 8 comprises a transverse metal plate 82, with bottom teeth formed on the bottom of the transverse metal plate 82. The bottom teeth are substantially uniform in height and adopt a spur gear structure. Side flanges 81 extend from the left and right sides of the transverse metal plate. The side flanges 81 are provided with mounting holes. The side flanges 81 are fixed to the inner wall of the shoe frame 1 via connectors such as rivets or screws. The front first side teeth 30 and the rear second side teeth 31 are arranged in two symmetrical front and rear sections. The rear second side teeth 31 and the rear toothed member 8 are integrally formed. The lower ends of the side flanges 81 of the rear toothed member 8 are folded outward to align substantially vertically with the bottom of the shoe frame 1, and the side teeth are formed on the bottom. The front first side teeth 30 are arranged on the left and right sides of the front part of the shoe frame 1 corresponding to the position of the front tooth part 9. The front first side teeth 30 include a metal plate. The upper end of the metal plate is provided with a through hole corresponding to the mounting hole 12 of the shoe frame 1. The lower end of the metal plate is folded outward and basically vertically aligned with the bottom of the shoe frame 1, and side teeth are formed at the bottom. The front first side teeth 30 are fixed to the side of the shoe frame 1 by connecting parts such as rivets or screws.

[0059] like Figures 12-15 The front tooth piece 9 is arranged horizontally between the front inner walls of the shoe frame 1. The position of the shoe upper 6 corresponding to the front tooth piece 9 is provided with a hollow portion 61. The hollow portion 61 is generally trapezoidal in shape, with a rounded transition at the corner. The main body of the front tooth piece 9 is a metal plate 90. Three first front teeth 91 and two second front teeth 92 are bent and pressed out of the front and back of the metal plate respectively. The first front teeth 91 and the second front teeth 92 both have bottom teeth with different heights. A transverse local axis hole 93 is pressed out of the middle part of the metal plate of the front tooth piece 9. Correspondingly, the treading portion 50 is arranged at the position corresponding to the hollow portion 61. The metal plate of the front tooth piece 9 is connected to the bottom of the front end of the treading portion 50 of the shoe upper. It is riveted and fixed, and a mounting sleeve hole is formed between the metal plate of the front tooth 9 and the bottom of the shoe upper stepping part 50. A metal cross bar 4 passes through the mounting sleeve hole and is connected to the axial hole 16 on the front inner wall of the shoe frame 1. In order to improve the strength of the shoe frame, the axial hole 16 is usually opened on the overlapping part of the side tooth 3 and the shoe frame 1. A shaft sleeve 41 is sleeved in the middle of the metal cross bar 4. The front tooth 9 is rotatably connected to the shoe frame 1 through the shaft sleeve 41 and the metal cross bar 4. Usually, in order to limit the movement of the front tooth 9 on the metal cross bar 4, limit sleeves 42 are respectively sleeved on the left and right ends of the metal cross bar 4, and each limit sleeve 42 is sleeved between the shaft sleeve 41 and the side of the shoe frame 1.

[0060] Thus, the side teeth 3, front teeth 9, and rear teeth 8 provide safety and anti-slip functions, making it less likely to fall when walking on snow. Furthermore, the side teeth 3 improve the mounting strength between the shoe frame 1 and the metal crossbar 4, and the rear teeth 8 improve the strength of the shoe frame 1. Of course, the shoe frame 1 is not limited to a single-piece structure made of triangular-section metal tubing. The shoe frame 1 can also be a two-piece structure formed by welding or splicing left and right sections or front and back sections, with the metal crossbar 4 connected between the left and right sections to strengthen the structure.

[0061] The upper 6 is fixed to the upper end surface of the shoe frame 1 by rivets. The upper 6 can be made of a hard plastic base plate and a soft plastic panel. A heel pedal 7 is fixed to the rear of the upper 6 by rivets. The heel pedal 7 is provided with a lifting device 10. The upper 5 includes an upper body, and the upper 5 body is provided with components such as a left heel strap 55, a right heel strap 56, a first strap 51, a second strap 52 and a buckle 53.

[0062] See also Figure 1 、 7 , wherein the lifting device 10 includes a support rod 101, which is a U-shaped metal rod with left and right sides bent downward. The rear crossbar of the support rod 101 is a corrugated crossbar. The support rod 101 is arranged on the upper 6 so as to be rotatable up and down around the heel pedal 7. The left and right sides of the heel pedal 7 are provided with positioning slots 62 on the upper 6 for the two ends of the support rod 101 to pass through and lift and position. The positioning slot 62 has two front and rear limiting slots, namely the front limiting slot 62 and the rear limiting slot 62. 21 and the rear limit slot 622. When the support rod 101 falls on the front limit slot 621 in front, the support rod is in a raised state, forming an angle with the heel pedal 7, which is not greater than 90°; when the support rod 101 falls on the rear limit slot 622 in the back, the support rod 101 is set on the upper 6 and is basically flush with the heel pedal 7. The two ends of the support rod 101 pass downward through the positioning slot 62 and are rotatably connected to the connecting plate 102 fixed on the horizontal metal plate of the rear gear 8. The connecting plate 102 is preferably a U-shaped metal plate, a connecting hole is opened in the middle of the connecting plate 102, and a corresponding through hole is opened in the middle of the transverse metal plate 82. The connecting plate 102 is fixed to the rear side of the transverse metal plate 82 by fixing parts such as screws or rivets. Axial holes are provided on the left and right sides of the connecting plate 102, and the ends of the bent ends on the left and right sides of the support rod 101 are bent inward to form connecting short shafts. The support rod 101 passes through the axial holes through the connecting short shafts on both sides to achieve rotatable connection with the connecting plate 102.

[0063] The strap structure belongs to the shoe upper 5, which mainly includes a treading part 50, a first strap 51, a second strap 52 and a buckle 53. The treading part 50 is located at the bottom of the shoe upper 5 corresponding to the front position of the vamp 6, and the treading part 50 is a plastic part.

[0064] like Figure 12 The front middle part of the treading part 50 is provided with a stopper 57 for preventing the shoe from moving forward, and a first perforated member 501 is provided on the stopper 57. The left and right sides of the front of the treading part 50 are respectively provided with left and right upper connecting pieces 58, and the left and right sides of the rear of the treading part are provided with left and right heel strap connecting pieces 59. The rear of the treading part 50 is provided with left and right heel straps, namely a left heel strap 55 and a right heel strap 56. A plurality of positioning holes are distributed on the left heel strap 55, and a plurality of positioning holes are distributed on the right heel strap 56. The left heel strap 55 and the right heel strap 56 are connected with the positioning buckle by the positioning buckle. The holes can be connected together in an adjustable tightness manner, which makes it easy to adjust the length of the heel strap to suit the binding and locking of shoes of different sizes. The second perforated member 502 and the third perforated member 503 are respectively provided on the upper connecting piece 58 on the inner side of the treading part (i.e., the left side of this embodiment) and the left heel strap 55. The upper connecting piece 58 on the outer side of the treading part 50 (i.e., the right side of this embodiment) and the right heel strap 56 are respectively provided with two front and rear buckles 53 that can lock or loosen the strap. There are two straps, namely the first strap 51 and the second strap 52. The first strap 5 One end of the first strap 51 is fixed to the outer right upper connecting piece 58 of the tread portion, usually fixed thereto by riveting with a bar buckle 53. The other end of the first strap 51 passes forward through the first perforated piece 501 on the stopper 57, then folds back backward, passes through the second perforated piece 502 on the inner left upper connecting piece 58, then folds back outward, passes through the front bar buckle 53 and is locked. One end of the second strap 52 is fixed to the third perforated piece 503 of the left heel strap 55 on the inner side of the tread portion, and the other end of the second strap 52 passes outward through the rear bar buckle 53 and is locked. The two straps are connected together after passing through the bar buckle 53. Usually, the free ends of the first strap 51 and the second strap 52 are respectively provided with buckles or rivets for buckling. The two straps pass through each group of corresponding buckles 53 and are connected together by buckles or rivets to form a handle. This makes the strap locking operation very convenient and quick. Just pull the handle to lock the upper and heel at the same time. There is no need to tighten the strap twice to lock the upper and heel separately in the traditional way. A drawstring 54 is connected between the two buckles 53, which can be used to loosen or lock the two straps, making it easy to open the two buckles 53 at the same time and naturally loosen the two straps on the upper and heel. Usually, the rear end of the left heel strap 55 passes through the positioning hole on the rear connecting piece 59 of the pedal part, so that the front end of the left heel strap 55 is fixedly connected to the second strap 52. The front end size of the left heel strap 55 is usually larger than the positioning hole, which can prevent it from moving out. A rivet hole is provided at the lower end of the buckle body of the buckle 53. The front buckle 53 is riveted and fixed to the corresponding front outer right shoe upper connecting piece 58, the front end of the right heel strap 56 is riveted and fixed to the outer heel connecting piece 59, and the lower end of the rear buckle 53 is riveted and fixed to the front end bending part of the right heel strap 56.

[0065] like Figures 5 and 6The buckle 53 is composed of a buckle body 531 and a pressure plate 532. The upper end of the buckle body 531 is concavely provided with a notch 531a, and the upper end of the notch 531a is transversely provided with a baffle 531b. The middle parts of both sides of the notch 531a are symmetrically provided with shaft holes 531c. The lower end of the pressure plate 532 is a second connecting portion 532a rotatably connected to the buckle body 531. The second connecting portion 532a is transversely provided with a through hole 532c corresponding to the shaft hole 531c. The lower end of the pressure plate 532 is rotatably connected to the buckle body 531 through a connecting shaft with a torsion spring. The first strap 51 or the second strap 52 is moved from the pressure plate The inner side of the second connection part 532a of 532 passes through the baffle 531b upward and then extends out of the buckle body 531 from the other side of the baffle 531b. The inner side of the second connection part 532a is laterally protruded with a tooth structure 532b that is connected to the strap 51 or 52. The upper end of the pressure plate 532 is provided with a connecting hole 532d. The two ends of the pull rope 54 are respectively connected to the upper ends of the pressure plates 532 of the two buckles 53. By pulling the pull rope 54, the pressure plate 532 is driven to rotate, thereby realizing the tight contact between the tooth structure 532b and the first strap 51 or the second strap 52 or the loosening of the first strap 51 or the second strap 52. The outer side surface of the pressure plate 532 is a smooth arc surface, and the connecting hole 532d is horizontally opened in the middle position of the upper end of the pressure plate 532. The second connecting part 532a at the lower end of the pressure plate 532 is a cam-shaped structure, the outer side surface of which is a smooth arc surface, and the tooth structure 532b on the inner side surface is three strip-shaped convex teeth arranged at intervals laterally.

[0066] During installation, first install the front tooth piece 3 on the shoe frame, and fix the front tooth piece 9 to the front bottom of the shoe upper 5 by riveting. When fixing, first install the metal cross bar 4 and the shaft sleeve 41, and then install it through the mounting hole to rotate with the shoe frame 1, then plug and fix the tail connector 2 to the shoe frame 1, and then install the rear tooth piece 8 on the shoe frame, and then fix the upper 6 to the shoe frame 1 by rivets, and then install the heel pedal 7 on the upper 6, and the lifting device 10 is ready.

[0067] When the snow boots need to be taken off, the first and second straps 51, 52 can be loosened naturally by pulling the drawstring 54, and the snow boots can be taken off conveniently. Example 2

[0068] like Figures 18 and 19 As shown, the shoe frame in this embodiment adopts a metal pipe with a main section of a triangular section, and the cross section adopts a right-angled triangle section, see Figure 19 One of the right-angled sides serves as the mounting surface 13 of the shoe frame 1, and the acute angle 14 of the other right-angled side serves as the lower end of the shoe frame 1. The other right-angled side 15 can extend directly downward, usually vertically downward, so that its extended section constitutes a side tooth part 3 integrated with the shoe frame 1, which is similar to an integrally molded metal pipe with fins. In this way, the side tooth part 3 and the shoe frame 1 are an integral structure, and the rest is similar to the embodiment example 1. Example 3

[0069] like Figure 20 、 21 As shown, it is of course not limited to the metal pipe with a right triangle shape, but can also be a metal pipe with an isosceles triangle cross-section, the bottom side of which serves as the upper end face of the shoe frame 1, and the top angle 14a serves as the lower end of the shoe frame 1. The side tooth member 3 can be formed into an integral structure with the top angle 14a end of the shoe frame 1 through a profile forming process, so that its tooth structure is set and fixed on the top angle 14a end, located at the neutral line position of the top angle 14a, and the shoe frame 1 adopts a front and rear two-section structure, and the front and rear two sections are butt-welded and connected. Other aspects are similar to embodiment example 1.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A snow boot comprising a shoe frame, a shoe upper, shoe teeth and a shoe upper, wherein the shoe teeth are mounted and fixed below the shoe frame to form a shoe frame structure, characterized in that: The shoe frame body is an annular shoe frame or an annular shoe frame with a partial opening, made of a metal pipe with a triangular cross-section. The shoe frame has at least an upward-curved front end, a substantially horizontal middle portion, and a horizontal or upward-curved rear end. The upper end surface of the shoe frame serves as a mounting surface for mounting and fixing the shoe upper. The lower end of the shoe frame is substantially in the shape of a triangular point. A plurality of side teeth are spaced apart at the bottom of the triangular point structure at the lower end of the shoe frame to enhance the anti-slip effect. A heel pedal is fixed to the rear of the shoe upper by riveting or screwing, and a lifting device is provided on the heel pedal; The lifting device includes a support rod, which is a U-shaped metal rod bent downward on both sides. The rear cross bar of the support rod is a corrugated cross bar. A heel pedal is provided on the shoe upper. Positioning slots are provided on the left and right sides of the shoe upper for the two ends of the support rod to pass through and lift and position. The two ends of the support rod pass downward through the positioning slots and are directly or indirectly connected to the rear gear piece fixed horizontally on the shoe frame for rotation.

2. The snow boot according to claim 1, characterized in that: The shoe upper is fixed to the upper end surface of the shoe frame by riveting or screwing, and the shoe upper adopts a composite hard plastic bottom plate and a soft plastic panel.

3. The snow boot according to claim 1, characterized in that: The back of the rear tooth part is riveted, screwed or welded with a U-shaped metal plate as a connecting plate, and an axial hole is provided on the left and right sides of the connecting plate. The ends of the bent ends on the left and right sides of the support rod are bent inward to form a connecting short shaft that cooperates with the axial hole and rotates. The support rod passes through the axial hole and is rotatably connected to the connecting plate through the connecting short shafts on both sides.

4. The snow boot according to claim 3, characterized in that: The heel pedal is a plastic part, and the heel pedal and the upper are an integral part, or the heel pedal is fixed to the upper by riveting or screwing. The upper surface of the heel pedal is formed with a plurality of convex strips for easy pedaling.

5. The snow boot according to claim 1, characterized in that: A front tooth piece is also installed on the shoe frame, and a hollow portion is provided on the shoe upper corresponding to the position of the front tooth piece. The surface of the front tooth piece is riveted or screwed to the front end bottom of the shoe upper. The main body of the front tooth piece is a metal plate, and the first front tooth and the second front tooth are bent and pressed out at the front and back of the metal plate respectively, and a mounting sleeve hole is formed between the front tooth piece and the bottom of the shoe upper. There is also a metal cross bar, and an axle sleeve is sleeved in the middle of the metal cross bar. Correspondingly, the axle hole is opened on the overlapping part of the side tooth piece and the shoe frame. The front tooth piece is rotatably connected to the shoe frame through the axle sleeve and the metal cross bar.

6. The snow boot according to claim 1, characterized in that: The shoe upper has a strap structure, and the strap structure includes a tread portion, a strap and a buckle. The tread portion is located at the bottom of the shoe upper corresponding to the front position of the shoe upper. A stopper is convexly provided at the middle of the front end of the tread portion to prevent the shoe from moving forward. A first perforated piece is provided on the stopper. Left and right upper connecting pieces are respectively distributed on the left and right sides of the front of the tread portion. Left and right heel strap connecting pieces are arranged on the left and right sides of the rear of the tread portion. Among them, the upper connecting piece and the heel strap connecting piece on the inner side of the tread portion are respectively provided with a second perforated piece and a third perforated piece, and the upper connecting piece and the heel strap connecting piece on the outer side of the tread portion are respectively provided with two front and rear straps that can be tied to each other. The shoe is fastened or loosened by a buckle, and there are two straps. One end of the first strap is fixed to the outer upper connecting piece of the treading part, and the other end of the first strap passes through the first perforated piece on the block forward, then folds back backward, passes through the second perforated piece of the inner upper connecting piece, then folds back outward, and passes through the front buckle to lock; one end of the second strap is fixed to the third perforated piece of the heel strap connecting piece on the inner side of the treading part, and the other end of the second strap passes outward through the rear buckle to lock. The two straps are connected together after passing through the buckles to form a handle, and a drawstring is connected between the two buckles to loosen or lock the two straps.

7. The snow boot according to claim 6, characterized in that: The buckle is composed of a buckle body and a pressure plate. The upper end of the buckle body is concavely provided with a notch, and the upper end of the notch is laterally provided with a baffle. Axial holes are symmetrically opened in the middle of both sides of the notch. The lower end of the pressure plate is a second connecting part rotatably connected to the buckle body. The second connecting part is laterally provided with a through hole corresponding to the axle hole. The lower end of the pressure plate is rotatably connected to the buckle body through a connecting shaft with a torsion spring. The strap passes through the baffle from the inner side of the second connecting part of the pressure plate and then extends out of the buckle body from the other side of the baffle. The inner side of the second connecting part is laterally convex with a toothed structure that contacts the strap. The upper end of the pressure plate is provided with a connecting hole. The two ends of the pull rope are respectively connected to the upper ends of the pressure plates of the two buckles. By pulling the pull rope, the pressure plate is driven to rotate, thereby realizing that the toothed structure is tightly against or loosened from the strap.

8. The snow boot according to claim 7, characterized in that: The connecting hole is opened transversely in the middle of the upper end of the pressing plate. The second connecting part of the lower end of the pressing plate is a cam-shaped structure, the outer side of which is a smooth arc surface, and the tooth structure of the inner side is a plurality of strip-shaped convex teeth arranged transversely at intervals.

9. The snow boot according to claim 8, characterized in that: The treading part is a plastic part, and the rear end of the treading part is connected to the left heel strap and the right heel strap, wherein the rear end of the left heel strap passes through the positioning hole on the rear root connecting piece of the treading part, so that its front end is fixedly connected to the second strap, and a rivet hole is provided at the lower end of the buckle body of the buckle, the front buckle is riveted and fixed to the corresponding front outer shoe upper connecting piece, the front end of the right heel strap is riveted and fixed to the outer heel connecting piece, and the lower end of the rear buckle is riveted and fixed to the front end of the right heel strap.

10. The snow boot according to claim 8, characterized in that: The left heel strap is provided with a plurality of positioning buckles, and the right heel strap is provided with a plurality of positioning holes. The left heel strap and the right heel strap are connected together in an adjustable manner through the cooperation of the positioning buckles and the positioning holes. Alternatively, the left heel strap is provided with a plurality of positioning holes, and the right heel strap is provided with a plurality of positioning holes. The left heel strap and the right heel strap are connected together in an adjustable manner through the cooperation of the positioning buckles and the positioning holes.

11. The snow boot according to claim 8, characterized in that: The free ends of the first strap and the second strap are respectively provided with buckles or rivets for matching, and the two straps are connected together through the buckles or rivets after passing through the buckles.

12. The snow boot according to claim 1, wherein: The metal pipe with a triangular cross-section has a cross-section of an isosceles triangle or a right triangle. When the cross-section is an isosceles triangle, the bottom side serves as the upper end face of the shoe frame, the top angle serves as the lower end of the shoe frame, and the side teeth are arranged on the top angle end. When the cross-section is a right triangle, one of the right-angled sides serves as the upper end face of the shoe frame, the acute angle of the other right-angled side serves as the lower end of the shoe frame, the right-angled side serves as the inner side face of the shoe frame, and the side teeth are arranged on the inner side face of the shoe frame, or the downward extension section of the right-angled side constitutes a side tooth integrated with the shoe frame.

13. The snow boot according to claim 12, characterized in that: The metal tube with a triangular cross section is made into a one-piece structure with an opening at the rear end, and a tail connector is fixedly connected to the opening position at the rear end of the frame to form an annular shoe frame; or, the metal tube with a triangular cross section is made into a one-piece structure with an opening at the rear end, and the opening position is connected by welding to form an annular shoe frame; or, The metal pipe with a triangular cross-section is made into a left and right two-section structure, and the head and tail of the left and right sections are connected by an inner lining tube to form an annular shoe frame; or, the metal pipe with a triangular cross-section is made into a left and right two-section structure, and the head and tail of the left and right sections are connected by a head connector and a tail connector to form an annular shoe frame; or, the metal pipe with a triangular cross-section is made into a left and right two-section structure, and the head of the left and right sections is welded and the tail is connected by a tail connector to form an annular shoe frame; or, The metal pipe with a triangular cross-section is made into a two-section structure of head and tail, and the middle connecting part of the head and tail sections is connected by an inner lining pipe to form an annular shoe frame; or, the metal pipe with a triangular cross-section is made into a two-section structure of head and tail, and the middle connecting part of the head and tail sections is connected by left and right connecting pieces to form an annular shoe frame; or, the metal pipe with a triangular cross-section is made into a two-section structure of head and tail, and the middle connecting part of the head and tail sections is connected by welding to form an annular shoe frame.

14. The snow boot according to claim 13, characterized in that: The tail connector is a V-shaped or U-shaped structure with an arc transition shape. The tail connector is arranged at the rear end opening position of the shoe frame by plugging, screwing, riveting or welding to form a ring-shaped shoe frame.

15. The snow boot according to claim 13, wherein: Both ends of the tail connector are provided with plug-in parts that cooperate with the triangular holes of the metal pipe with a triangular cross-section at the opening of the shoe frame. The tail connector is fixed to the rear end of the shoe frame through size matching. The middle part of the upper end surface of the tail connector is provided with a first connecting part that is riveted or screwed to the rear end of the shoe upper.

16. The snow boot according to claim 12, wherein: The side teeth are distributed between the head bending end and the rear bending end of the shoe frame, and the side teeth are fixed together with the shoe frame by screw connection, riveting connection, welding connection or integral molding.

17. The snow boot according to claim 12, wherein: The shoe frame is also equipped with a rear tooth member, which includes a horizontal metal plate with bottom teeth formed on the bottom of the horizontal metal plate. Side flanges extend from the left and right sides of the horizontal metal plate, and the side flanges are fixed to the inner wall of the shoe frame by screw connection, riveting connection or welding connection.

18. The snow boot according to claim 17, characterized in that: The side teeth are composed of two front and rear sections that are symmetrically arranged on the left and right, namely the first side teeth and the second side teeth. The first side teeth of the front section include a metal plate, the upper part of the metal plate is folded inward or directly aligned with the bottom of the shoe frame, and side teeth are formed at the bottom of the metal plate. The second side teeth of the rear section are integrated with the rear teeth, the upper end of the side flange of the rear teeth is folded inward or directly aligned with the bottom of the shoe frame, and side teeth are formed at the bottom.

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