CN115226990A - Sole and shoe with carbon rod - Google Patents

Abstract

The invention discloses a sole with carbon rods and a shoe, comprising a foam sole plate for pedal support. The sole plate comprises a foot contact upper plate, a middle plate and a ground contact bottom plate in sequence from top to bottom. Two carbon rods are inlaid in the middle of the upper plate, and the bottom of the upper plate is positioned and inserted into the middle plate. A shoe made of a sole with carbon rods, including a shoe body, the shoe body includes a vamp, and the bottom edge of the vamp is connected to the middle plate through seams The upper plate is located at the bottom of the shoe body, and the bottom of the shoe body is limited and clamped to the upper plate. In the present invention, the sole plate is designed to be composed of a contact foot upper plate, a middle plate and a ground contact bottom plate from top to bottom. The bottom of the upper plate is designed with a plug-in plate with carbon rods for easy insertion and removal, and the carbon fiber structure is used, and the carbon rods have high Elastic for elastic support of the midfoot on the sole plate.

Description

Sole and shoe with carbon rod

technical field

The invention relates to the technical field of shoes, in particular to a sole with a carbon rod, and also relates to a shoe made of the sole with a carbon rod.

Background technique

Sports shoes are shoes designed and manufactured according to the characteristics of people participating in sports or travel. The soles of sports shoes are different from ordinary leather shoes and rubber shoes. They are generally soft and elastic, and can play a certain buffering role. It can enhance elasticity during exercise, and some can prevent ankle injuries. Therefore, sports shoes are generally worn during sports, especially high-intensity physical exercise, such as basketball, running, etc.

At present, sports shoes generally use carbon fiber plates for elastic support of the shoe body. The disadvantage of this method is that the support strength of the midfoot part is poor, so there are sports shoes in the form of carbon rods, but the elastic support of carbon fiber is easy to be in the sole. If it is damaged, it is irreparable for individuals, and the sports performance of the shoes plummets. At the same time, the price of sports shoes with carbon fiber elastic supports is higher, so that the damage of the carbon fiber elastic supports will bring consumers a lot of damage. greater economic loss.

To this end, we provide a sole and shoe with carbon rods to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a sole with a carbon rod to solve the problems raised in the above-mentioned background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a sole with a carbon rod and a shoe, including a foam sole plate for foot support, the sole plate from top to bottom sequentially includes a foot contact upper plate, a middle two carbon rods are inlaid in the middle of the upper board, and the bottom of the upper board is positioned and inserted into the middle board, and the carbon rods are detachably plugged and glued to the middle of the middle board, so that the carbon rods It is elastically supported on the midfoot part of the sole plate, and the carbon rod is set to be broken and replaceable;

The upper plate includes a foot plate, the upper surface of the foot plate is in contact with the foot surface, the middle part of the bottom surface of the foot plate is integrally provided with an insert plate, and the middle part of the plate body of the insert plate is inlaid with two symmetrically arranged carbon rods, and the end of each carbon rod is All of them protrude from the surface of the plug-in board, the middle part of the middle board is provided with a slot corresponding to the plug-in board, the side wall of the slot is provided with a socket corresponding to the carbon rod, and the bottom of the plug-in board is positioned and inserted into the socket, each Both ends of the carbon rod can be detachably plugged into the jack;

The inner bottom of the insert plate is provided with a first through port corresponding to each carbon rod, and the mouth of the first through port does not exceed the bottom surface of the insert plate, and the middle part of each carbon rod is exposed to the outside through the first through hole below, and There are liquid-conducting cavities from the middle to both ends of each carbon rod. The liquid-guiding cavities of each carbon rod are provided with glue injection ports that communicate with the outside world under the exposed section in the middle, and the interior of the sticker on the carbon rod is An annular liquid guiding groove is provided, the bottom of the liquid guiding groove is connected with the liquid guiding cavity, and a glue outlet is opened on the side of the liquid guiding groove facing the inner bottom surface of the sticking groove;

Each of the first through openings on the base plate is provided with a second through opening, and when the base plate is glued to the bottom of the middle plate, the glue injection opening is exposed to the outside through the first through opening and the second through opening that are communicated with each other.

As an optional solution of the sole with carbon rods of the present invention, wherein: the carbon rods are arranged in a straight columnar structure, the outside of the carbon rods includes hollow tubular carbon tubes, and the carbon tubes are filled with several strips Filament-like carbon strips, and a colloidal resin bonding layer is filled in the carbon tubes, and the resin bonding layer is filled between the carbon strips and solidified to form a solidified carbon rod as a whole, and the carbon tubes and the carbon strips are both carbon fibers. Parts.

As an optional solution of the shoe sole with carbon rods of the present invention, wherein: the insert plate is configured as a rectangular block structure, and the slot matching the insert plate is configured as a rectangular slot.

As an optional solution of the shoe sole with carbon rods of the present invention, wherein: the insertion hole sequentially includes a sticking groove and a sticking groove from the inner wall of the slot to the depth of the middle plate, and the sticking groove and the sticking groove are both set as A round hole groove, and the inner diameter of the sticking groove is larger than that of the rod groove.

As an optional solution of the shoe sole with carbon rods of the present invention, wherein: both ends of the carbon rod protruding from the insert plate are fixedly sleeved with annular plastic stickers, the thickness of the stickers is ≤ 5mm, and the thickness of the stickers is ≤ 5mm. The body is inserted and received in the sticking groove, the end face of the sticking plate is hidden and received in the sticking groove without protruding, and the end of the carbon rod is inserted into the stick groove.

As an optional solution of the sole with carbon rods of the present invention, wherein: a plurality of arc-shaped convex snap rings are arranged at equal intervals on both ends of the protruding insert plate of each carbon tube, and the rod grooves are connected with each other in the rod groove. The corresponding positions of each snap ring are provided with a snap slot, and when the carbon tube is inserted into the rod slot, the ring body of the snap ring is inserted and held in the snap slot.

As an optional solution of the shoe sole with carbon rods of the present invention, wherein: after the carbon rod is solidified and formed, a liquid guide channel is formed by perforating the rod, and the inner diameter of the liquid guide channel is smaller than the diameter of the carbon rod. half.

As an optional solution of the shoe sole with carbon rod of the present invention, wherein: when the glue is injected into the glue outlet, the glue enters the liquid guiding groove through the liquid guiding cavity, and the liquid guiding groove discharges the glue through the glue outlet, and the glue Adhesive panels and grooves.

A shoe made of a sole with a carbon rod, comprising a shoe body, the shoe body comprising a shoe upper, the bottom edge of the shoe upper is connected to the edge of a middle plate through seams, and the upper plate is located at the bottom of the shoe body, And the bottom of the shoe body is clamped to the upper plate.

As an optional solution of the shoe of the present invention, wherein: the inner side of the upper edge is fixedly connected to the upper plate with a cover plate, the cover plate is set as a foam shoe plate, and the edge of the upper plate is connected to the cover plate. Corresponding positions are provided with pressure grooves, the plate body of the cover plate is inserted into the pressure groove, and the top surface of the cover plate is flush with the top surface of the upper plate and does not protrude.

Compared with the prior art, the beneficial effects of the present invention:

1. The soleplate of the designed shoe is composed of the upper plate of the contact foot, the middle plate and the bottom plate of the contact foot from top to bottom. The bottom of the upper plate is designed with a plug-in board with carbon rods, and the two ends of the carbon rods protrude from the plug-in board, and the protruding end is designed The sticker plate and the snap ring, the middle part of the middle plate is provided with a corresponding slot, so that the rod end of the carbon rod is inserted into the sticker slot through the sticker plate, and the rod end with the snap ring is inserted into the stick slot with the snap ring, and let The insert plate is inserted into the slot, and with the assistance of the carbon rods that are inserted and held, the insert plate is stably fitted into the slot, and the carbon rod is designed to include a carbon tube containing filamentary carbon strips. Filling and curing through the resin bonding layer, using the carbon fiber structure, the carbon rod has high elasticity, so as to provide elastic support for the midfoot on the sole plate;

2. At the same time, a liquid guide channel for glue injection is set in the carbon rod, a liquid guide groove and a glue outlet are provided on the sticker to communicate with the liquid guide channel, and the bottom of the upper board and the bottom of the bottom plate are opened corresponding to the middle of the carbon rod. The port connected to the outside world, the liquid guide channel is located in the middle of the carbon rod, and the glue injection port can be directly injected with glue, so that the sticker board is glued to the sticker groove, so that the upper board is reinforced to a certain extent and the connection is strengthened to a certain extent. Stability of deformation support;

In the above design, the overall structure of the upper plate is inserted and glued on the middle plate, and the upper plate can be pulled out forcefully, the upper plate can be pulled out, a new upper plate can be replaced, and the socket gluing steps can be repeated, which can facilitate the user to replace it alone and continue to perform high performance. By using sports shoes, the problem that the carbon fiber elastic support cannot be replaced after being broken in the prior art is improved, and the economic burden of repurchasing the user is improved.

3. The upper seam on the shoe body is connected to the edge of the middle plate, and the foot surface presses the upper plate. When the shoe body is deformed in motion, the middle plate of the sole plate is pulled by the upper, and the upper plate foot surface is limited by the foot , followed by force and deformation, so that the whole sole plate can cooperate with elastic support for deformation, and with the assistance of carbon rods, it can effectively carry out stable elastic support in the middle part, and the use effect is strong.

4. The inner part of the upper adopts a cover plate to limit the edge of the upper plate, which can be positioned through the four peripheral edges and the middle part, so that the upper plate can be installed in the shoe body in a limited position, so as to reduce the movement of the upper plate inside the shoe body, so that the feet can contact and facilitate movement. , the sole plate stably supports the middle part.

Description of drawings

Fig. 1 is the exploded structure schematic diagram of sole plate of the present invention.

FIG. 2 is a partial cross-sectional structural schematic diagram of the connection relationship at the carbon rod of the present invention.

FIG. 3 is a schematic front view of the partial structure of the carbon rod of the present invention.

FIG. 4 is a schematic diagram of a partial cross-sectional structure of a plate in the present invention.

FIG. 5 is a schematic view of the front structure of the present invention.

FIG. 6 is a schematic cross-sectional structure diagram of the shoe body of the present invention.

In the figure: 1, sole plate; 2, middle plate; 201, slot; 202, jack; 2021, sticking slot; 2022, rod slot; 2023, card slot; 3, bottom plate; 301, second port; 4 , Upper plate; 401, Foot plate; 402, Insert plate; 403, Carbon rod; 4031, Carbon tube; 4032, Carbon strip; 4033, Resin bonding layer; 405, snap ring; 406, veneer; 4061, liquid guide groove; 4062, glue outlet; 5, shoe body; 501, shoe upper; 502, cover plate; 503, pressure groove.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-6, the present invention provides a technical solution: a sole with a carbon rod and a shoe, including a foam sole plate 1 for foot support, the sole plate 1 from top to bottom sequentially includes a contact foot Plate 4, middle plate 2 and bottom plate 3, two carbon rods 403 are inlaid in the middle of the upper plate 4, and the bottom of the upper plate 4 is positioned and inserted on the middle plate 2, and the carbon rods 403 are detachably inserted and glued to the In the middle of the middle plate 2, the carbon rod 403 is elastically supported on the midfoot part of the sole plate 1, and the carbon rod 403 is broken and removable, which is convenient for manual repair of sports shoes and ensures the performance of sports shoes;

The upper plate 4 includes a foot plate 401. The upper surface of the foot plate 401 contacts the foot surface and supports the foot. The middle of the bottom surface of the foot plate 401 is integrally provided with an insert plate 402. The middle of the plate body of the insert plate 402 is inlaid with two symmetrically arranged carbon rods 403. And the end of each carbon rod 403 protrudes from the surface of the plug board 402, the middle part of the middle plate 2 corresponds to the plug board 402 with a slot 201, the side wall of the slot 201 corresponds to the carbon rod 403 is provided with a socket 202, and the plug board 402 is provided with a socket 202. The bottom is positioned and inserted into the slot 201, and both ends of each carbon rod 403 can be detachably inserted into the slot 202 for the upper plate 4 to quickly combine the middle plate 2;

In this embodiment, the carbon rods 403 are arranged in a straight columnar structure. The outside of the carbon rods 403 includes a hollow tubular carbon tube 4031 . A colloidal resin bonding layer 4033 is filled, and the resin bonding layer 4033 is filled between the carbon bars 4032 and solidified to form a solidified carbon bar 403 as a whole, and the carbon tubes 4031 and the carbon bars 4032 are both carbon fiber The rod 403 utilizes the carbon fiber structure and has high elasticity, which is convenient for midfoot elastic support in the middle of the sole plate 1;

Further, the plug-in board 402 is set as a rectangular block structure, and the slot 201 cooperates with the plug-in board 402 to be set as a rectangular slot, so that the plug-in board 402 can be positioned and inserted into the socket 201 through the foot shape direction, so that the upper board 4 is initially attached to the slot 201 . on the middle plate 2;

Further, the jack 202 includes a sticking slot 2021 and a rod slot 2022 from the inner wall of the slot 201 to the depth of the middle plate 2 in sequence. 2022;

Further, both ends of the carbon rod 403 protruding from the plug board 402 are fixedly sleeved with a ring-shaped plastic sticker 406, the thickness of the sticker 406 is less than or equal to 5mm, the board body of the sticker 406 is inserted and received in the sticker groove 2021, and the sticker The end face of the carbon rod 406 is hidden and stored in the sticking groove 2021 without protruding, and the end of the carbon rod 403 is inserted into the rod groove 2022;

When actually assembling, align the insert plate 402 at the bottom of the upper plate 4 with the slot 201 of the middle plate 2 , bend the end of the carbon rod 403 , and squeeze it into the slot 202 . At this time, the end of the carbon rod 403 is inserted into the rod slot 2022 of the socket 202, the sticker 406 on the carbon stick 403 is inserted into the sticker slot 2021, and the side wall of the insert board 402 is in contact with the inner wall of the slot 201, and is preliminarily clamped. Combine the upper plate 4 and the middle plate 2.

As a further improvement of this embodiment, a plurality of arc-shaped convex snap rings 405 are arranged at equal intervals on both ends of each carbon tube 4031 protruding from the insert plate 402, and the positions corresponding to the snap rings 405 in the rod groove 2022 are opened There is a card slot 2023, when the carbon tube 4031 is inserted into the rod slot 2022, the ring body of the snap ring 405 is inserted and held in the card slot 2023;

When the upper plate 4 is assembled on the middle plate 2, the rod end of the carbon rod 403 is inserted into the slot 2021 through the sticker 406 and the rod end with the snap ring 405 is inserted into the stick slot 2022 with the slot 2023, The plug-in board 402 is inserted into the slot 201 by fitting, and the plug-in board 402 is stably fitted into the socket 201 with the assistance of the carbon rod 403 which is inserted and held.

A first through port 404 is opened at the inner bottom of the insert plate 402 corresponding to each carbon rod 403, and the mouth of the first through port 404 does not exceed the bottom surface of the insert plate 402, and the middle of each carbon rod 403 passes through the first through port below. 404 is exposed to the outside world, and a liquid guide channel 4035 is opened from the middle to both ends of each carbon rod 403. The liquid guide channel 4035 of each carbon rod 403 is provided with a glue injection port that communicates with the outside world under the exposed section in the middle. 4034, and the inside of the sticker 406 on the carbon rod 403 is provided with an annular liquid guide groove 4061, the bottom of the liquid guide groove 4061 is connected to the liquid guide channel 4035, and a side of the liquid guide groove 4061 facing the inner bottom surface of the sticking groove 2021 is opened. The glue port 4062 is used for glue injection to bond and fix the carbon rod 403 and the jack 202;

In this embodiment, after the carbon rod 403 is cured and formed, a liquid guide channel 4035 is formed by perforating the rod, and the inner diameter of the liquid guide channel 4035 is less than half of the diameter of the carbon rod 403, so as to prevent the carbon rod 403 from being easily broken during movement and deformation ;

Further, when glue is injected into the glue outlet 4062, the glue enters the liquid guide groove 4061 through the liquid guide channel 4035, the liquid guide groove 4061 discharges the glue through the glue outlet 4062, and the glue sticks the sticker 406 and the sticker groove 2021.

The bottom plate 3 is provided with a second port 301 corresponding to each of the first ports 404. When the bottom plate 3 is glued to the bottom of the middle plate 2, the glue injection port 4034 is exposed to the outside through the first port 404 and the second port 301 that communicate with each other. , for the use of glue injection;

After the upper plate 4, the middle plate 2 and the bottom plate 3 are combined to form the sole plate 1, the upper plate 4 is used to contact the bearing surface, the upper plate 4 in the shoe will not be separated during exercise, and after the carbon rod 403 is broken, because it is only plastic The single-sided gluing of the veneer 406 itself can maintain a certain fixation. After pulling it out with force, the upper plate 4 can be extracted, a new upper plate 4 can be replaced, and the socket gluing steps can be repeated, which can be convenient for the user to replace by himself. Continue High-performance use sneakers.

A shoe made of a sole with carbon rods, including a shoe body 5, the shoe body 5 includes a vamp 501, the bottom edge of the vamp 501 is connected to the edge of the middle plate 2 through seams, and the upper plate 4 is located in the shoe body 5. bottom, and the inner bottom of the shoe body 5 is limited and engaged with the upper plate 4 .

In this embodiment, a ring of cover plate 502 is fixedly connected to the inner edge of the upper plate 501 with the upper plate 4, the cover plate 502 is set as a foam shoe plate, and a pressure groove 503 is formed on the edge of the upper plate 4 corresponding to the cover plate 502. The plate body of the plate 502 is inserted into the pressing groove 503, and the top surface of the cover plate 502 is flush with the top surface of the upper plate 4 and does not protrude, so that the surface is flat and the foot surface is prevented from protruding.

The above-mentioned structural design, through the positioning of the four peripheral edges and the middle part, makes the upper plate 4 limited and installed in the shoe body 5, reducing the movement of the upper plate 4 inside the shoe body 5, so that the foot contacts, and also facilitates movement, the sole plate 1 Elastic support for cooperative deformation.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a take sole and shoes of carbon-point, is including being used for pedal foaming sole board (1) that supports, its characterized in that: the shoe sole plate (1) sequentially comprises a contact upper plate (4), a middle plate (2) and a ground-contacting bottom plate (3) from top to bottom, two carbon rods (403) are embedded in the middle of the upper plate (4), the bottom of the upper plate (4) is positioned and inserted in the middle plate (2), the carbon rods (403) are detachably inserted in the middle of the middle plate (2) in a splicing manner, the carbon rods (403) are elastically supported on the middle foot parts of the shoe sole plate (1), and the carbon rods (403) are arranged to be broken and replaceable;

the upper plate (4) comprises a foot plate (401), the upper surface of the foot plate (401) is in contact with a foot surface, an inserting plate (402) is integrally arranged in the middle of the bottom surface of the foot plate (401), two symmetrically arranged carbon rods (403) are embedded in the middle of a plate body of the inserting plate (402), the end part of each carbon rod (403) protrudes out of the surface of the inserting plate (402), a slot (201) is formed in the middle of the middle plate (2) corresponding to the inserting plate (402), a jack (202) is formed in the side wall of the slot (201) corresponding to each carbon rod (403), the bottom of the inserting plate (402) is positioned and inserted into the slot (201), and two ends of each carbon rod (403) are detachably inserted into the jacks (202);

the bottom in the inserting plate (402) is provided with a first through hole (404) corresponding to each carbon rod (403), the opening of the first through hole (404) does not exceed the bottom of the inserting plate (402), the middle of each carbon rod (403) is exposed to the outside through the first through hole (404) below, liquid guide channels (4035) are arranged from the middle to two ends of each carbon rod (403), the liquid guide channel (4035) of each carbon rod (403) is provided with a glue injection port (4034) communicated with the outside below the middle exposed section, an annular liquid guide groove (4061) is formed in the pasting plate (406) on the carbon rod (403), the bottom of the liquid guide groove (4061) is communicated with the liquid guide channels (4035), and a glue outlet (4062) is formed in one side, facing the inner bottom of the pasting groove (2021), of the liquid guide groove (4061);

second through openings (301) are formed in the bottom plate (3) corresponding to the first through openings (404), when the bottom plate (3) is glued to the bottom of the middle plate (2), the glue injection opening (4034) is exposed to the outside through the first through opening (404) and the second through opening (301) which are communicated with each other.

2. The sole and the shoe with the carbon rod as claimed in claim 1, wherein: carbon-point (403) set up to straight strip cylindricality structure, carbon-point (403) outside includes hollow tubular carbon pipe (4031), carbon pipe (4031) intussuseption is filled with a plurality of filamentous carbon strip (4032), and fills colloidal resin tie layer (4033) in carbon pipe (4031), and resin tie layer (4033) is filled between carbon strip (4032) and is solidified, forms carbon-point (403) of solidification wholly, and sets up carbon pipe (4031) and carbon strip (4032) and be the carbon fiber finished piece.

3. The sole and the shoe with the carbon rod as claimed in claim 2, wherein: the inserting plate (402) is arranged to be a rectangular block structure, and the inserting groove (201) is matched with the inserting plate (402) and arranged to be a rectangular groove.

4. The sole and the shoe with the carbon rod as claimed in claim 3, wherein: the jack (202) sequentially comprises a sticking groove (2021) and a rod groove (2022) from the inner wall of the slot (201) to the deep part of the middle plate (2), the sticking groove (2021) and the rod groove (2022) are both provided with round hole grooves, and the inner diameter of the sticking groove (2021) is larger than that of the rod groove (2022).

5. The sole and the shoe with the carbon rod as claimed in claim 4, wherein: annular plastic flitch plates (406) are fixedly sleeved at two ends of the carbon rod (403) protruding out of the inserting plate (402), the thickness of the flitch plates (406) is smaller than or equal to 5mm, plate bodies of the flitch plates (406) are inserted into the flitch grooves (2021) in an inserting mode, the end faces of the flitch plates (406) are hidden and contained in the flitch grooves (2021) and do not protrude, and the end portions of the carbon rod (403) are inserted into the rod grooves (2022).

6. The sole and the shoe with the carbon rod as claimed in claim 5, wherein: the carbon tube socket is characterized in that a plurality of arc-shaped raised snap rings (405) are arranged at equal intervals at two ends of each carbon tube (4031) protruding inserting plate (402), clamping grooves (2023) are formed in positions corresponding to the snap rings (405) in the bar grooves (2022), and when the carbon tubes (4031) are inserted into the bar grooves (2022), ring bodies of the snap rings (405) are inserted into the clamping grooves (2023) in a clamping mode.

7. The sole and the shoe with the carbon rod as claimed in claim 6, wherein: and after the carbon rod (403) is cured and molded, a liquid guide channel (4035) is formed in the rod through a hole, and the inner diameter of the liquid guide channel (4035) is less than half of the diameter of the carbon rod (403).

8. The sole and the shoe with the carbon rod as claimed in claim 7, wherein: when glue is injected into the glue outlet (4062), the glue enters the liquid guide groove (4061) through the liquid guide cavity channel (4035), the glue is discharged from the liquid guide groove (4061) through the glue outlet (4062), and the glue is adhered to the pasting board (406) and the pasting groove (2021).

9. A shoe made according to claim 8, comprising a shoe body (5), characterized in that: the shoe body (5) comprises a vamp (501), the bottom edge of the vamp (501) is connected to the edge of the middle plate (2) through a seam, the upper plate (4) is located at the bottom in the shoe body (5), and the bottom in the shoe body (5) is limited by the upper clamping plate (4).

10. The shoe of claim 9, wherein: the shoe upper is characterized in that a circle of cover plate (502) is fixedly connected to the inner side of the edge of the shoe upper (501) and is matched with the upper plate (4), the cover plate (502) is arranged to be a foaming shoe plate, a pressing groove (503) is formed in the position, corresponding to the cover plate (502), of the edge of the upper plate (4), a plate body of the cover plate (502) is inserted into the pressing groove (503), and the top surface of the cover plate (502) is flush with the top surface of the upper plate (4) and is not protruded.

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