CN1475176A

CN1475176A - Shoe-sole

Info

Publication number: CN1475176A
Application number: CNA021305218A
Authority: CN
Inventors: 菅原文雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-14
Filing date: 2002-08-14
Publication date: 2004-02-18
Anticipated expiration: 2022-08-14
Also published as: CN1201685C

Abstract

A shoe sole features that it can be simply switched between buffer action and no buffer action by embedding a buffer tool in the flexible part of main sole body. Said buffer tool is composed of slotted supporter, leaf spring, cam, switching axle, bearings for switching axle, and drive mechanism of said switching axle. Turning the switching axle can switch between said two states.

Description

Sole

Technical field

The present invention relates to a kind of straw sandals, clog, sport footwear, trainer shoe, recovery sole that use with footwear such as footwear, that can not feel fatigue, and use the instrument of giving cushioning effect on this sole.

Background technology

Proposed a lot of designs in the past, buried elastomer underground, and, made walking comfortable with under its reaction at sole.

For example in No. 66604/1998 application for a patent for invention communique of Japan, a kind of foaming body that is made of synthetic rubber, polyurethane rubber that is embedded with has been proposed, compression helical spring, air cushion due to the hollow, elastomers such as dish spring, leaf spring all are to have cushioning effect and reaction to give the structure of sole shock-absorbing capacity.

Summary of the invention

When the purpose of this invention is to provide a kind of walking, after stepping then all under foot ground connection by pin heel, can when stepping next time, promote pin heel power, play body weight moves when helping to advance effect and when walking usually or during collection, can become the sole of the state of not bringing into play lifting force and use the instrument of giving cushioning effect of this sole.

The present invention in order to achieve the above object, its the 1st invention is, a kind of sole, it is characterized in that, give in the bend that the cushioning effect instrument is embedded in sole body, and give the cushioning effect instrument by groove shape carriage, have bend inserted and have the portion that buries underground that fuses in this groove shape carriage and in these bend both sides respectively, and this buries the plate spring sheet that portion's angulation is V shape or approximate horizontal shape underground, have the described bend of this plate spring sheet of pushing and make the described cam that portion's angulation changes of burying underground, and the end is provided with the switching shaft of revolution with the junction surface, be fixed to the bearing of the described switching shaft on the two ends of described groove shape carriage, and the rotating driving mechanism of described switching shaft is constituted.

The described portion that buries underground can be fixed on the sole body, also can bury one or both sides movably underground.

The 2nd invention is, a kind of cushioning effect instrument of giving that uses in the sole that is embedded in, by groove shape carriage, have bend inserted and have the portion that buries underground that fuses in this groove shape carriage and in these bend both sides respectively, and this buries the plate spring sheet that portion's angulation is V shape or approximate horizontal shape underground, have the described bend of this plate spring sheet of pushing and make the described cam that portion's angulation changes of burying underground, and the end is provided with the switching shaft of revolution with the junction surface, be fixed to the bearing of the described switching shaft on the two ends of described groove shape carriage, and the rotating driving mechanism of described switching shaft is constituted.

In the described the 1st and the 2nd invention, groove shape carriage is made by metal or synthetic resin etc., fix the fixed head of burying underground that groove shape carriage can be fixed firmly on the sole body in its outside, and the bend of plate spring sheet can become the shape of falling Ω or triangle or Si shape or concavity.

Description of drawings

Fig. 1 is the vertical view of the present invention the 1st embodiment,

Fig. 2 is a vertical view of giving the major part amplification of cushioning effect instrument,

Fig. 3 is a front view of giving the amplification of cushioning effect instrument,

Fig. 4 is a left side view of giving the cushioning effect instrument,

Fig. 5 is the cutaway view along the V-V line of Fig. 3,

Fig. 6 is the vertical view that groove shape metal bracket amplifies,

Fig. 7 is the front view that groove shape metal bracket amplifies,

The vertical view that Fig. 8 amplifies for plate spring sheet,

The front view that Fig. 9 amplifies for plate spring sheet,

The vertical view that Figure 10 amplifies for switching shaft,

The front view that Figure 11 amplifies for switching shaft,

Figure 12 A is the front view that bearing amplifies,

Figure 12 B is the side view that bearing amplifies,

Figure 13 A-1 is the vertical profile side view that illustrates under the common state of sole,

Figure 13 A-2 is a side view of giving the amplification of cushioning effect instrument under the common state,

Figure 13 B-1 illustrates the vertical profile side view under the preceding state of ground connection when giving cushioning effect,

Figure 13 B-2 is the side view of the amplification under the preceding state of ground connection when giving cushioning effect,

Figure 13 C-1 illustrates the vertical profile side view that begins when giving cushioning effect under the walking state,

Figure 13 C-2 is the side view that begins the amplification under the walking state when giving cushioning effect,

Figure 14 is the vertical view of the present invention the 2nd embodiment,

Figure 15 A is the vertical view that groove shape metal bracket amplifies,

Figure 15 B is the side view that groove shape metal bracket amplifies,

Figure 16 A is the vertical view that plate spring sheet is amplified,

Figure 16 B is the side view that plate spring sheet is amplified,

Figure 17 A is the vertical view that switching shaft amplifies,

Figure 17 B is the side view that switching shaft amplifies,

Figure 18 A is the front view that bearing amplifies,

Figure 18 B is the side view that bearing amplifies,

Figure 19 A is the front view that bearing amplifies,

Figure 19 B is the side view that bearing amplifies,

Figure 20 A is the side view in the normal state of the present invention the 2nd embodiment,

Figure 20 B be the 2nd embodiment of the present invention give cushioning effect the time side view,

Figure 21 A is the side view under the common state of the 3rd embodiment of the present invention,

Figure 21 B be the 3rd embodiment of the present invention give cushioning effect the time side view,

Figure 22 A is the side view of the amplification under the common state of the 4th embodiment of the present invention,

Figure 22 B be the 4th embodiment of the present invention give cushioning effect the time the vertical profile side view of amplification,

Figure 23 is the cutaway view that the amplification of the other embodiment of switching shaft is shown,

Figure 24 A is the vertical profile side view of the amplification under the common state of the 5th embodiment of the present invention,

Figure 24 B be the 5th embodiment of the present invention give cushioning effect the time the vertical profile side view of amplification,

Figure 25 A is the vertical profile side view of the amplification under the common state of the 6th embodiment of the present invention,

Figure 25 B be the 6th embodiment of the present invention give cushioning effect the time the vertical profile side view of amplification,

Figure 26 is the vertical view of the 7th embodiment of the present invention,

Figure 27 A is the vertical view that groove shape metal bracket amplifies,

Figure 27 B is the side view that groove shape metal bracket amplifies,

Figure 28 A is the vertical view that plate spring sheet is amplified,

Figure 28 B is the side view that plate spring sheet is amplified,

Figure 29 A is the vertical view that switching shaft amplifies,

Figure 29 B is the side view that switching shaft amplifies,

Figure 30 is the cutaway view along the XXX-XXX line of Figure 29 B,

Figure 31 A is the front view that bearing amplifies,

Figure 31 B is the side view that bearing amplifies,

Figure 32 A is the vertical view that rubber gasket amplifies,

Figure 32 B is the front view of the amplification of rubber gasket,

Figure 33 A is the vertical view that pad amplifies,

Figure 33 B is the front view that pad amplifies,

Figure 34 A is the vertical view of the bolt amplification of band hex hole,

Figure 34 B is the front view of the bolt amplification of band hex hole,

Figure 35 A is the vertical profile side view under the common state of the 7th embodiment of the present invention,

Figure 35 B be the 7th embodiment of the present invention give cushioning effect the time the vertical profile side view.

The specific embodiment

The 1st embodiment

Fig. 1 illustrates the 1st embodiment of the present invention, and A is an instrument of giving cushioning effect, the sole body of B for being made of synthetic rubber.

Fig. 2 is the vertical view of amplification of giving the major part of cushioning effect instrument, Fig. 3 is the front view of amplification of giving the instrument of cushioning effect, Fig. 4 is a left side view of giving the instrument of cushioning effect, Fig. 5 is the cutaway view along the V-V line of Fig. 3,1 is as shown in Figure 6 and Figure 7, be provided with at lateral surface and bury fixed head 2 underground, 2, section is the groove shape metal bracket of C font, 3 is as Fig. 8 and plate spring sheet shown in Figure 9, under free state, become V shape as shown in Figure 9, this plate spring sheet has the sigmoid of the falling Ω portion 4 that inserts in the aforementioned grooves shape metal bracket 1, in its both sides, be provided with the portion that buries underground 7 of reinforcement 5 and through hole 6 and bury portion 8 underground, burying portion 7 underground is the V shape with the angle of burying portion's 8 formation underground.

9 is switching shaft as shown in Figure 10 and Figure 11, both sides inner edge 4a with the sigmoid of falling Ω portion 4 of pushing aforementioned panels reed 3,4b makes intermarginal expansion in these both sides and dwindles, section is fan-shaped cam 10, and the end of switching shaft is provided with revolution connecting portion 11 (being flat recess in an embodiment) and

external thread part

12,13,13 is the bearing of the aforementioned switching shaft shown in Figure 12 A and Figure 12 B, this bearing has stage portion 13a, by soft soldering, weld and wait the two ends that stage portion 13a are fixed to aforementioned grooves shape

metal bracket

1,14 are the nut on the external thread part 12 that tightens to switching shaft 9.

Then, give being assembled into of cushioning effect instrument A, at first, from the side in the bend 4 insertion groove shape metal brackets 1 with plate spring sheet 3, then, from the side switching shaft 9 is inserted in these bends 4, with from the two ends of switching shaft 9 clampingly mode insert bearing 13, with groove shape metal bracket 1 and bearing 13 by bonding or soft soldering of bonding agent or welding etc. fixing after, nut 14 is tightened on the external thread part 12 of switching shaft 9.At this moment, fan-shaped cam 10 becomes the state of Figure 13 B-2, the 10b of the narrow width side of cam 10 up owing to when sole is made, bury underground very difficult towards sole B, so, screwdriver etc. is inserted in the flat recess at screwdriver junction surface 11 of switching shaft 9, shown in Figure 13 A-2, for the wider width side 10a that makes cam 10 up, return turnback, make bend 4 both sides inner edge 4a, enlarge between 4b, burying portion 7 underground and burying portion 8 underground becomes horizontal.At last, nut 14 is fastened on the external thread part 12 of switching shaft 9 by spanner etc., and cam 10 with this fixed-site to bearing 13.

The instrument A that gives cushioning effect of said structure is, shown in Fig. 1 and Figure 13 A-1,, bury toe side underground by burying portion 7 underground at sole body B place, be embedded in pin heel side and will bury portion 8 underground, can become the state of giving sole body B shock-absorbing capacity or not giving shock-absorbing capacity.In addition, bury underground under the situation among the sole body B, do not anchor at, can not turn round with the constituent material of sole, will implement the precautionary measures of release agent application etc. certainly in order not make cam and rotating part after burying underground.

Bury underground give cushioning effect instrument A sole shown in Figure 13 A-2, make switching shaft 9 revolutions, wider width side 10a is up the time, wider width side 10a embeds the both sides inner edge 4a of bend 4, between 4b, because it is intermarginal that expansion has been opened in the both sides, sole body B becomes plane, becomes the situation the same with common sole.Therefore, can not collect bad.

In addition, when revolution switching shaft 9 makes the 10b of narrow width portion up, shown in Figure 13 B-2 and Figure 13 C-2, sole body B becomes the V shape, owing to given shock-absorbing capacity by plate spring sheet 3, when wearing the footwear walking that has this sole body B, given under the reaction that A causes of cushioning effect instrument, promoted body weight by the pin heel towards the moving of tiptoe, make the step well balanced easily.

And because under plate spring sheet 3 effects, reaction force promotes body weight, thereby pin heel or achilles tendon can not feel tired, and a kind of footwear that are suitable for long-time walking can be provided.

In the 1st above-mentioned embodiment, what a side of burying portion underground was embedded in the tiptoe side does not step on native portion, and opposite side is embedded in pin heel side, but the situation of burying underground is not limited to this, also can be embedded in the bend toe tip and not stepping between native portion for example of giving cushioning effect.

In addition, in the present embodiment,, be that screwdriver junction surface 11 is set on switching shaft 9 as the driving mechanism that rotates switching shaft 9, and for making the switching shaft 9 nonvoluntary revolutions fastening structure of nut 14, but be not limited to this structure.

The 2nd embodiment

Figure 14 illustrates the 2nd embodiment of the present invention, and A1 is for giving the cushioning effect instrument, the sole body of B1 for being made of synthetic rubber.

1 ' makes or metal groove shape carriage for the synthetic resin with fitting recess 16 shown in Figure 15,31 is the plate spring sheet shown in Figure 16 A and Figure 16 B, this plate spring sheet has bend 41 in the fitting recess 16 that inserts in the aforementioned grooves shape carriage 1 ', that bend to triangular shape, the portion that buries underground 81 of portion that buries underground 71 that its both sides are provided with and band through hole 6 fuses mutually, under free state, become the state of the approximate horizontal shown in Figure 16 B.

91 shown in Figure 17 A and Figure 17 B, be switching shaft, have pushing aforementioned panels reed 31 triangular shape bend 41 bottom side portion, section is rectangular cam 101, and the end at switching shaft is provided with external thread part 12,131,132 is the bearing that adhesive securement the aforementioned switching shaft 91 is there also passed through at two ends shown in Figure 18 A and Figure 18 B or Figure 19 A and Figure 19 B, that embed aforementioned grooves shape carriage 1 ', is provided with the waterproof gasket seal 131a that rubber is made in the axis hole of bearing 131.14 ' is the nut on the external thread part 12 that tightens to switching shaft 91.

Give being assembled into of cushioning effect instrument A1, at first, in the bend 41 insertion groove shape carriages 1 ' with plate spring sheet 31, then, switching shaft 91 is inserted in this bend 41, bearing 131,132 install to the two ends of switching shaft 91 after, with adhesive securement groove shape carriage 1 ' and bearing 131,132, and nut 14 ' tightens on the external thread part 12 of switching shaft 91, and with adhesive securement to external thread part 12.

Then, this gives cushioning effect instrument A1 towards being installed as of sole body B1, and will bury the pin heel that portion 81 buried and be fixed to sole body B1 underground underground, and will bury that portion 71 is installed to sole body B1 with can move freely underground do not step on Tu Bushang.In the present embodiment, as shown in figure 20, be provided with recess 15 on sole body B1, the reinforcement lid 16a that the synthetic resin of hard is made bonds on the sole body B1, to form hollow, can move therein thereby bury portion 71 underground.

Give when the cushioning effect, when switching shaft turn 90 degrees for 91 times, cam 101 becomes when vertical, pushing the inboard lower surface of the bend 41 of the triangular shape that is supported by the both sides upper limb of groove shape carriage 1 ', thereby burying portion 71 underground, plate spring sheet 31 all one-tenth V shapes towards the 1 ' in-draw of groove shape carriage.As a result, shown in Figure 20 B, sole body B1 becomes the V shape, by plate spring sheet 31, gives shock-absorbing capacity.

In the present embodiment, when giving shock-absorbing capacity, in order not swell at the end 17 in making, at the middle end 17 and give and be provided with the reinforcement lid 16a that flexible hard resin makes between the cushioning effect instrument, 16b, in addition, for the nondestructive buffering effect, joint-cutting 16c is being set for the position of the fulcrum of V font.

The 3rd embodiment

In aforementioned the 2nd embodiment, be fixed on the sole with bonding way burying portion 81 underground, but the present invention the 3rd embodiment that also can be shown in Figure 21 A and Figure 21 B is such, bury portion 71 underground and bury portion 81 underground and also can be respectively and move towards groove shape carrier direction.At this moment, be provided with

reinforcement lid

16a, 16b, 16d with aforementioned same, for the nondestructive buffering performance, is provided with joint-cutting 16c at position of the fulcrum.

The 4th embodiment

Figure 22 A and Figure 22 B are the cutaway view of the amplification of the 4th embodiment of the present invention, and the plate spring sheet 32 that the portion that buries underground 81 of employing pin heel side shortens still can obtain the buffering effect same with previous embodiment.

In the 4th embodiment, be two and bury the structure that

portion

71 and 81 together moves underground that when making cam 101 revolutions with the inboard lower surface of downward pushing triangular shape bend 41, plate spring sheet 32 is all to become the V shapes, sole body B1 becomes the V shape, has given shock-absorbing capacity by plate spring sheet 32.

In addition, in the groove shape carriage 1 ' that uses, be the structure that interior bosom enlarges in aforementioned the 3rd embodiment and present embodiment, during cam 101 actions, the distortion of bend 41 can not contact the inner surface of groove shape carriage 1 ', can carry out swimmingly.

Figure 23 illustrates other embodiment of cam 101, in the 3rd and the 4th embodiment, for the angle that makes plate spring sheet 32 changed by 2 stages, be that outstanding length with cam 101 becomes W1 and these 2 kinds of modes of W2 realize, thus, revolution switching shaft 91 just can switch to 2 kinds with the V shape deformation angle of plate spring sheet 32.

The 5th embodiment

Figure 24 A and Figure 24 B illustrate the cutaway view of the amplification of the 5th embodiment, in the 4th embodiment shown in Figure 22 A and Figure 22 B, the portion that buries underground 71 of not stepping on native side is longer, and the portion that buries underground 81 of pin heel side is shorter, but in the 5th embodiment, on the contrary, the portion that buries underground 71 of not stepping on native side is shorter, and the portion that buries underground 81 of pin heel side is longer.

The length of portion is so opposite to be provided with even will bury underground, also can be by the revolution of cam 101, to bury underground portion 71 with bury underground portion's 81 angulations as Figure 24 A flatly, perhaps V shape variation as Figure 24 B, it is same with the 4th embodiment to give shock-absorbing capacity to sole body B1.

The 6th embodiment

Figure 25 A and Figure 25 B illustrate a plurality of cushioning effect instrument A1 that give and are embedded in the 6th embodiment on the sole B2, Figure 25 A illustrates and respectively gives buffering instrument A1, A1 is roughly level, thereby Figure 25 B illustrates and makes cam 101 revolution respectively give buffering instrument A1, and A1 is in the state of V shape.

At this, under Figure 25 B state, when row is run in walking, by the cushioning effect instrument of giving of pin heel side, body weight is applied in the pin heel cushioning effect that causes with upward force, relaxed impact to pin, achilles tendon, knee joint etc., simultaneously, under the power effect of tiptoe direction, play the effect that walking etc. more has rhythm and carries out swimmingly.Equally, by the cushioning effect instrument of giving of tiptoe, when body weight is applied to tiptoe, has cushioning effect that upward force is arranged and produce towards the power of tiptoe direction effect with auxiliary walking.In addition, in carrying out the sports that vollyball or basketball etc. need to jump, the sole of the application of the invention under the cushioning effect that makes progress, can obtain higher spring, when available buffer lands to the impact of pin.In addition, when the position of giving shock-absorbing capacity is many places, can freely have or not the combination of cushioning effect according to walking or motion or hobby.

As above-mentioned, adopt words of the present invention, can provide a kind of long-time walking also can not feel tired footwear, and, can provide a kind of and can replace to footwear under the no cushioning effect state simply by what this scheme in the past can not be considered.

The 7th embodiment

Figure 26 illustrates the 7th embodiment of the present invention, and A2 is for giving the cushioning effect instrument, the sole body of B2 for being made of synthetic rubber.

1 " make or metal groove shape carriage for the synthetic resin with the fitting recess 16 ' shown in Figure 27 A and Figure 27 B; 32 be the plate spring sheet shown in Figure 28 A and Figure 28 B; have and insert aforementioned grooves shape carriage 1 " fitting recess 16 ' bend 42 interior, that bend to concavity, its base becomes the arch shape of anti-pushing, be respectively equipped with it all-in-one-piece buries portion 72 underground and buries portion 82 underground in the both sides of bend 42, under free state, be depicted as the state of approximate horizontal as Figure 28 B.

92 shown in Figure 29 A and Figure 29 B, be switching shaft, have pushing aforementioned panels reed 32 concavity bend 42 bottom side portion, section as shown in figure 30, from central shaft towards 3 direction (W3, W4, W5) cam 102 that width has nothing in common with each other, and be provided with internal thread part 121 in an end of switching shaft, and the other end pivot suspension is in the dead eye 134 shown in Figure 27 A and Figure 27 B.133 for embedding the aforementioned grooves shape carriage 1 shown in Figure 31 A and Figure 31 B " end and by the bearing of adhesive securement at this aforementioned switching shaft 92, embed the rubber gasket 135 shown in Figure 32 A and Figure 32 B and the bolt 14 of the band hexagon ring that is threaded with the internal thread part 121 of switching shaft 92 shown in the pad 136 shown in Figure 33 A, Figure 33 B and Figure 34 A and Figure 34 B among the dead eye 133a of bearing 133 ".

Give being assembled into of cushioning effect instrument A2, at first, with the bend 42 insertion groove shape carriages 1 of plate spring sheet 32 " in, then; switching shaft 92 is inserted in this bend 42; bearing 133 installs to a side of switching shaft 92, and another distolateral pivot suspension is in axis hole 134, with adhesive securement groove shape carriage 1 " and bearing 133, rubber gasket 135 and pad 136 are fitted among the axis hole 133a, simultaneously, behind the pivot suspension axle 92, with the bolt 14 of band hexagon ring " tighten on the internal thread part 121.

This gives cushioning effect instrument A2 being installed as on the sole body B2, is installed to not stepping on native portion and the pin heel of sole body B2 with burying portion 72 underground and burying portion 82 underground with can move freely respectively.In the present embodiment, shown in Figure 35 A, be provided with recess 15 ' on sole body B2, the reinforcement lid 16 ' a that hard resin is made bonds on the sole body B2, forming hollow, thereby buries portion 72 underground and buries portion 82 underground and can move therein.

Give when the cushioning effect, when switching shaft turn 90 degrees for 92 times, pushing by groove shape carriage 1 " the inboard lower surface of concavity bend 41 of both sides upper limbs supporting, thereby bury portion 72 underground and bury portion 82 underground towards groove shape carriage 1 " in-draw, plate spring sheet 32 is all to become the V shapes.As a result, shown in Figure 35 B, sole body B2 becomes the V shape, by plate spring sheet 32, gives shock-absorbing capacity.In addition, cam 102 because 3 direction width differences, turn 90 degrees for 92 times by whenever making switching shaft as shown in figure 30, the length difference of the decline of the inboard lower surface of concavity bend 42, thereby the intensity of cushioning effect changeable be 3 stages.In addition, give buffering instrument A2 and be built in fully in the sole body B2, compare better appearance with previous embodiment.

In addition, in the present embodiment, same with previous embodiment 2, when giving shock-absorbing capacity,, be provided with the reinforcement that hard resin springy makes between the cushioning effect instrument and cover 16 ' a with giving at the middle end 17 ' in order not swell at the end 17 ' in making, 16 ' b, in addition, for the nondestructive buffering effect, be provided with joint-cutting 16 ' c at the position of the fulcrum that becomes the V font.

Much less, also can be same with embodiment 4～embodiment 6, make the portion that buries underground 72 that gives cushioning effect instrument 32 or bury portion 82 underground shorter, and will give cushioning effect instrument A2 and be embedded among a plurality of sole body B2.

Claims

1. sole, it is characterized in that, give in the bend that the cushioning effect instrument is embedded in sole body, and give the cushioning effect instrument by groove shape carriage, have bend inserted and have the portion that buries underground that fuses in this groove shape carriage and in these bend both sides respectively, and this buries the plate spring sheet that portion's angulation is V shape or approximate horizontal shape underground, have the described bend of this plate spring sheet of pushing and make the described cam that portion's angulation changes of burying underground, and the end is provided with the switching shaft of revolution with the junction surface, be fixed to the bearing of the described switching shaft on the two ends of described groove shape carriage, and the rotating driving mechanism of described switching shaft is constituted.

2. according to the described sole of claim 1, it is characterized in that, bury the portion that buries underground of a side or two examples movably underground.

3. give the cushioning effect instrument for one kind, by groove shape carriage, have and insert bend in this groove shape carriage and have the portion that buries underground that fuses respectively in these bend both sides and this buries the plate spring sheet that portion's angulation is V shape or approximate horizontal shape underground, have the described bend of this plate spring sheet of pushing and make described cam and the end of burying portion's angulation variation underground be provided with the switching shaft of revolution with the junction surface, be fixed to the bearing of the described switching shaft on the two ends of described groove shape carriage, and the rotating driving mechanism of described switching shaft is constituted.

4. according to the described cushioning effect instrument of giving of claim 3, it is characterized in that, be provided with in the outside of groove shape carriage and bury fixed head underground, and the bend of plate spring sheet becomes the shape of falling Ω.

5. according to the described cushioning effect instrument of giving of claim 3, it is characterized in that the bend triangularity shape of plate spring sheet.

6. according to the described cushioning effect instrument of giving of claim 3, it is characterized in that the bend of plate spring sheet is a concavity.