CN1671904A - Sewing machine needle having an elliptical flattening - Google Patents

Abstract

The invention relates to a sewing needle machine comprising a shaft (3) which extends from one end, the envelope surface of said shaft being provided with at least one thread groove (6) extending in the direction of the end, from the region of the needle tip. The needle cross-section comprises, at least longitudinally, a first profiled region (13) having a basic shape of a semicircle into which grooves (6) are integrated, and a second profiled region (14) which borders the bottom straight line (H) of the semicircle, the basic shape of the second profiled region comprising, in relation to a symmetrical semicircle, a diminished cross-section (c) which is oriented perpendicularly to the bottom straight line (H) of the semicircle. The aim of the invention is to advantageously develop one such sewing machine needle. To this end, the diminished cross-section (c) is formed by an at least elliptical-like outer contour (15,16,17,18) of the second profiled region (14).

Description

Sewing needles with elliptical flattening

The present invention relates to a kind of Sewing needles, the shank of this eedle has wire casing that at least one extends along pin heel direction from pin heel extension and in its side of extending from needle region, this pin cross section has on part at least along its length: first shaped region of semicircle basic configuration is embedded with wire casing in this first shaped region; And comprise second shaped region, this second shaped region is the border with the baseline of semicircle, and the basic configuration of this second shaped region has about this semicircle baseline with respect to the semicircle of mirror image symmetry and reduces along horizontal cross section.

Have the Sewing needles that this cross section reduces and in DE3810481A1, carried out disclosing (section AA and CC).Wherein, the cross section that is provided with on the wire casing opposite reduces to form the roughly straight line graduation in cross section, so this graduation is in the side of extending on the whole cross section projection bottom section of this wire casing and only this graduation changes circular profile in the borderline region of space sealing.The transition portion of this space boundary has comprised and has been shaped crookedly that this radius of a circle is local relatively becomes big in this bending, and needs very high producing cost, for example in pin cross section compression molded.In addition, this cross section of semicircle baseline laterally reduces and must limit so relatively: between the bottom and its plane graduation of this wire casing, the remaining cross section that relative this semicircle baseline laterally exists, need minimum residual thickness, so that the mechanical load that applies provides enough intensity relatively, particularly prevent bending and distortion on Sewing needles.

Therefore, the objective of the invention is to propose a kind of Sewing needles of the above-mentioned type, make that it is significantly improved.

The Sewing needles of the feature by having claim 1 in first kind of situation has obtained above-mentioned target, stipulates in the claim 1 that it is that preferably oval at least outer boundary by this second shaped region forms that this cross section reduces.Therefore preferably this second shaped region is the border with ellipse or elliptic contour, the profile that is transformed into the basic semi-circular shape of first shaped region continuously at this ellipticity of some place that intersects with the semicircle baseline or elliptic contour.Best point in addition from intersecting with this semicircle baseline, this ellipse border profile has the radius that increases continuously, the bending that promptly reduces continuously is because this border increases the point that ground symmetry axis close respectively and perpendicular to this semicircle baseline and extension bottom this wire casing intersects gradually.In preferred special structure, propose at least to have satisfied the basic equation that is used for ellipse (oval border) along the outer boundary of this second shaped region of a part of this circumferential length

${\left(\frac{x}{a}\right)}^2+{\left(\frac{y}{b}\right)}^2=1$

For following description, variable a represents in two semiaxis of this ellipse that than major axis, variable b represents than minor axis.Roughly ellipse or ellipticity boundary profile are understood that also to mean that oval relatively boundary profile has the boundary profile of little deviation, even have exceeded manufacturing tolerance yet within the scope of the invention.Compare with the contrast cross section in the basic configuration of pure circle, cartouche has advantageously at first obtained the effect that cross section reduces, and makes pin of the present invention cross section mean that also the pinprick in the material of sewing diminishes according to the mode of expectation.On the other hand, because by this graduation, the maximum cross-section width of pure standard round in the longitudinal direction of semicircle baseline is horizontal by relative semicircle baseline, promptly limit the cross section and reduce and keep, so mean particularly and roughly kept cross-sectional strength at (promptly similarly in the longitudinal direction of this semicircle baseline) aspect the bending stress that takes place on the sewing direction with respect to the separator bar between this first shaped region and second shaped region.Because total convex shape of this ellipse external boundary, significantly reduce the pin cross section if desired, compare bigger with relative flat graduation situation, even when considering distance minimum between the summit on this wire casing and oval border because of causes for stable, also can obtain such result, compare simultaneously the bending that can avoid this cross sectional boundary profile bending greater than this circle standard profile with flat graduation.In the stitching process term, promptly for the use of Sewing needles of the present invention, this means when cross section reduces, the resistance that penetrates that penetrates in this material of making also is reduced, simultaneously along sewing direction, the i.e. relative horizontal direction of this needle tray, the stability of this pin is roughly kept with respect to the contrast pin with circular cross-section.Simultaneously, compare with having that flat cross section reduces and have about equally the contrast pin of sectional area, can obtain little girth by oval border of the present invention.

In addition, best Sewing needles of the present invention has the groove that the pinprick from the needle point side extends along pin heel direction, so that be provided for sinker burr, the coil of shuttle or analog picks up enough spaces at the top of hook, therefore, increased the reliability of avoiding the wire jumper seam.This groove for example can be configured to flat bottomed recess in a known way or be configured to have along the longitudinal direction of this Sewing needles the radial groove of corresponding forming pockets profile.For the position of this groove in the pin cross section, groove is arranged in this second shaped region, particularly at the excircle place on this wire casing opposite.Especially, this groove can be embedded in the part place along the length of this Sewing needles, wherein can carry out reducing according to this elliptic cross-section of the present invention.According to the circumferential position of this groove, realize in certain zone on the pin cross section that at least the cross section exceed this ellipse graduation reduces, wherein select its circumferential position according to the cross section and the length of the passage of this groove.In one embodiment, oval graduation of the present invention and respectively relative this semicircle baseline lateral alignment of cross section graduation of passing through this groove, in this embodiment, although carried out graduation of the present invention, but when reducing the stitching hole, advantageously realized, along the relative horizontal sewing direction of this groove, guarantee the stability of pin.In a suitable improvement, may be from the zone of needle point, for example the conical lower portion of needle point begins, and this elliptic cross-section reduces to extend to this groove along pin heel direction in longitudinal direction continuously, preferably surpasses this groove.Like this, in order in the material of sewing, to obtain especially little stitching hole, even can on the whole length that pin penetrates, the pin cross section be defined as only to be included in first and second shaped regions that limit in the narration of front.

For second shaped region, preferably have semielliptical basic configuration, its longitudinal axis overlaps with the semicircle baseline.Alternatively or in combination, design this semielliptical transverse axis and be arranged in the shared straight line of line with the mirror image symmetry of the wire casing in pin cross section.The long semiaxis that is arranged in two semiaxis on this oval longitudinal axis is preferably compared the big 5-20% of the length that has, especially roughly big 7%, 10% or 14% with short semiaxis.According to the stitching hole dimension of expectation and according to the structure in pin cross section, other length is suitable than also.

For first shaped region, preferably from the semicircle baseline, this cross sectional boundary shape on two sides of this wire casing along the circumferential direction meets basic semi-circular shape, equals or exceeds the radius of a circle of the cross sectional shape that is set to be tangential on this wire casing.In addition, the wire casing that is preferably in the pin cross section just extends in first shaped region.Also can consider a kind of suitable structure, wherein the bottom land of this wire casing has the outburst area of rounding, and is more particularly rounded in the cross section of this pin.For the wire casing of such rounding, can be with reference to applicant's DE10026576A1, its content is introduced the application, so that in the claims in conjunction with its feature.

For advantageous effects, in above-mentioned application, also described relatively along the pinprick direction bending force horizontal with relative pinprick, the stop surface that advantageously couches is to be realized by the preferred big spill rounding of the wire casing in circular shank, for the present invention, this is most important, therefore can obtain the compensation that reduces according to shape in principle, even in the situation that the cross section of this shank of circular relatively shank cross section reduces, can obtain compensation possible rigidity.Yet because the significant reduction of rigidity can be avoided especially by the of the present invention oval graduation in shank cross section, so for this point, even may obtain such bar rigidity: by the rounding wire casing of a suitable shaping, this bar rigidity even greater than the reduced value of round pin.

In a suitable improvement, can also construct the additional wire casing or the supplemental tank of the bottom land that has the cross section rounding, and be provided with in the pin cross section on the roughly opposite of the wire casing that can in first shaped region, inlay.At this on the one hand, preferably this supplemental tank is contained in second shaped region on oval border, makes directly to obtain additional stiffness in this shaped region, and this shaped region reduces its cross section by the graduation of the multidirectional alignment of corresponding wall.In addition, above-mentioned additional wire casing or supplemental tank can also cause being advantageously used in yarn guide itself, because obtained yarn guide preferably, have reduced the danger of yarn breakage.Indicated as the test that the applicant carries out, advantageously obtained these advantages by additional wire casing or supplemental tank also accident, the slot cross-section of described additional wire casing or supplemental tank particularly groove depth less than the slot cross-section or the degree of depth of wire casing.May for being used to construct the preferred of wire casing and additional wire casing on the other side or supplemental tank, and for therefore in test in increase with pin rigidity of setting up on the pin of circular section, can be similarly with reference to the DE10026576A1 of same Applicant.Should also introduce in this application fully in the disclosed content of first to file, be used for feature wherein is attached to claims of the application.

Preferably supplemental tank with respect to wire casing, has the slot cross-section of less or approximate same size.For being shaped and dimensioned, the bottom land of this wire casing and/or supplemental tank can be followed the cross section circular contour fully, can have half of length of this semicircle baseline roughly for the diameter of this circular contour.In another structure, the degree of depth that can construct this supplemental tank less than or be substantially equal to the degree of depth of this wire casing.Preferably the cross section opening span width of this supplemental tank less than or be substantially equal to the net section A/F of this wire casing.For the homogeneous state of stress in the pin cross section that promotes also to be suitable for high cross section load distributes, the supplemental tank in the pin cross section and/or the side of wire casing become the obtuse angle to extend with the side of this shank relatively.If the side of this needle tray and/or supplemental tank enters into the side of this shank with protruding rounding form in the pin cross section, the reduction effect that exists a kind of relative stress to concentrate, i.e. favourable effect.

In addition, can also shank cross section that sewing needle has with oval mode graduation situation of the present invention in, between the pin heel of this bar and larger cross-section, form truncated cone, tapering transition preferably, if this shank has roughly cross section or suitable along uniform basic configuration and this basic configuration of length between this transition and groove uniformly, enter into this needle region.This makes can save independently shank part, strengthen with the transition portion adjacency and with opposite way, even in shank cross section that Sewing needles has according to the present invention by graduation, preferably with the situation of the supplemental tank combination of wire casing and possible increase pin rigidity under, like this.

The present invention describes below with reference to the accompanying drawings, has wherein reproduced the preferred embodiment of Sewing machines of the present invention, and accompanying drawing comprises:

Fig. 1 shows the side view of first embodiment of Sewing needles of the present invention;

Fig. 2 shows the vertical view of Sewing needles shown in Figure 1;

Fig. 3 shows along first profile of the amplification of the Sewing needles shown in Figure 2 of hatching III-III;

Fig. 4 shows along second profile of the amplification of the Sewing needles shown in Figure 2 of hatching IV-IV;

Fig. 5 shows the profile of amplification of second preferred embodiment of Sewing needles of the present invention, and wherein Fig. 3 provides bigger elliptical flattening relatively;

Fig. 6 shows the amplification profile of the 3rd preferred embodiment of Sewing machines of the present invention;

Fig. 7 shows having supplemental tank and not having the side view (having some cutaway areas) of the further preferred embodiment of bracing piece part of Sewing machines of the present invention;

Fig. 8 shows along the profile of the amplification of hatching VIII-VIII Sewing needles shown in Figure 7; With

Fig. 9 shows the amplification profile of another preferred embodiment of Sewing needles of the present invention.

Fig. 1 shows the side view of first preferred embodiment of Sewing needles 1 of the present invention.This needle set has the shank 3 that extends from pin heel 2.In the embodiment shown, pin heel 2 is configured to the round pin heel, but also can use the pin heel of flattened needle heel or other suitable shape within the scope of the invention.This shank 3 has wire casing 6 on its side 4, this wire casing 6 extends and extends to along the longitudinal direction the bracing piece zone 3 ' to the direction of pin heel 2 from needle region 5, and this bracing piece zone 3 ' extends in the pin heel 2 by the taper amplifier section.This needle region 5 extends to pinprick 9 from needle point 8 by adjacency tapered segment 7.This is along the direction of pin heel 2 and groove 10 adjacency, wire casing 6 opposites of this groove 10 on the pin cross section, and be configured to flat bottomed recess in this embodiment.Notice at this embodiment, only shown in Figure 1 by way of example, one of them further embodiment also is preferably scope of the present invention, and the difference with one of first embodiment wherein is, the represented the sort of additional bracing piece in Fig. 1 and 2 king-rod zone 3 ' no longer is set.Therefore this bar 3 can pass through its elongated cross section, as illustrated in fig. 1 and 2, extends to pin heel 2 or pin heel transitional region respectively fully.With the pin of Fig. 22 adjacent transitional regions of calling in person, for example tapering transition zone (promptly also can be the transition portion 26 shown in Fig. 7), not paying attention to the routine in bar cross section strengthens, along strengthening on the part of length, but has the section transitions gradually of pin heel from this continuous elongate rod to relatively large cross section.

Fig. 2 shows along the vertical view of the preferred embodiment of the Sewing machines of the present invention 1 of the direction of observation II among Fig. 1.Hatching III-III among Fig. 2 has represented can understand its shape by the cross section of the bar 3 of groove 10 fronts by Fig. 3.In addition, the hatching IV-IV among Fig. 2 has represented to pass the cross section of the bar 3 of these tapered segment 5 fronts, can understand its shape by Fig. 4.For the cross section shown in Fig. 3 and following or the like, K represents the circular contour as basis or contrast geometry, this circular contour with dash line-line represent, thereby express its importance.This central shaft M is extended perpendicular to the direction on the drawing plane of this profile in edge, center by this circular contour K, and this central shaft M can also see in Fig. 1 and 2.Toward each other, this cross sectional boundary profile that holds the half mould face of wire casing is made into to follow along the circular contour K on the part 11,12 that begins from a P1 and P2 respectively of this circumferential length on the circumference of this circular contour K for two some P1 and P2.Therefore, first shaped region 13 that is limited by the connecting line between a P1 and P2 has the basic configuration of semicircle, thereby makes the described connecting line between P1 and P2 can be with reference to semicircle baseline H.This pin cross section also has second shaped region 14, this second shaped region 14 along semicircle baseline H in abutting connection with this first shaped region 13.With about semicircle baseline H with respect to the expression first shaped region 13 semicircle, the semicircle of radial symmetric setting is compared, the cross section of this second shaped region 14 reduces the H horizontal expansion of the relative semicircle baseline of c and is limited by the oval outer boundary 15 of second shaped region 14 that extends between a P1 and P2, as shown shown in the embodiment.Length and degree that this cross section reduces c change along with the projected position on the semicircle baseline, the cross section that obtains in the intersection point place of boundary profile and this semicircle baseline reduces the degree minimum, and the cross section that obtains in S place, the summit of this second shaped region reduces the degree maximum.Along oval outer boundary 15, the boundary profile in this pin cross section among Fig. 3 is followed the aforesaid oval fundamental equation that is used for, a is the long semiaxis of half ellipse, b is the short semiaxis of half ellipse, and described half ellipse has constituted the basic configuration of the given relatively coordinate direction of second shaped region.In this respect, basic configuration means within the scope of the present invention, if even when on the part section of this second profile, having the clean skew of inside of particularly towards this cross section (for example groove shapes may further be wire casing or analog), also can use oval border.Further illustrate as institute, in an embodiment, show simultaneously to radius that should circular contour K than major semiaxis a.Although this ellipse outer boundary 15 in pin cross section shown in Figure 3 is in the front of this groove 10, satisfied and be used for oval described fundamental equation, but the oval outer boundary 16 in the cross section shown in Fig. 4 is positioned at the front of this tapered segment 7, show the definite slightly curved shapes that protrude of cartouche E of this equation relatively more, thereby still can be called substantially elliptical outer boundary at least.In the cross section of Fig. 3 and Fig. 4, accordingly semielliptical have equal length b respectively than semi-minor axis.This means that this elliptic cross-section reduces not only continuous direction to pin heel 2 and exceeds this groove 10 from needle region 5 extensions, and in special embodiment, by the top line 20 of this oval summit S, extending along being parallel to this central shaft M on the part of this length along this ellipse graduation of the longitudinal direction extension of this pin.In addition, in the preferred embodiment shown in Fig. 3 and 4, long semiaxis a has equal length.Long semiaxis a compares the relatively shorter semiaxis b of the length that has with this short semiaxis b big by 7%.First shaped region 13 hereto, between Fig. 3 and 4, has skew, make along circumferential length 11 ', 12 ' be made for the part of following circular contour K in Fig. 4, have than in Fig. 3 along circumferential length 11, the length that 12 part is big makes in the cross section of the front of this groove 10 cross section with respect to these tapered segment 7 fronts cause the more flat slightly transition portion to wire casing 6.In addition, in the front of this groove 10, the sidepiece 21,22 of this wire casing 6 zone at an upper portion thereof has than the more flat slightly shape of sidepiece 21 ', 22 ' in tapered segment 7 fronts.

Fig. 5 show by Sewing machines 1 of the present invention on the position corresponding to the cutaway view of second preferred embodiment in the zone of the bar 3 of the hatching III-III of Fig. 2.Compare with the cross section shown in Fig. 3,, selected bigger cross section to reduce c here for the position equidistant respectively with the y axle.For the semiellipse that links to each other, than the relatively shorter semiaxis b of the length of major semiaxis a (being somebody's turn to do short semiaxis b relatively) roughly big 20%.

Fig. 6 shows the cross section view of the 3rd preferred embodiment that passes Sewing needles 1 of the present invention, and this embodiment is similarly about the position of the hatching III-III of Fig. 2.From semicircle baseline H, the boundary shape of this first shaped region 13 on two sides of wire casing 6 is along the circumferential direction followed semi-circular shape, surpasses the radius of a circle be arranged to the tangent part T of the cross sectional shape of wire casing 6.Yet wire casing 6 has the wire casing 24 that has elevated regions, and this elevated regions is rounded along the cross section of pin.Should be 1.525 millimeters than length actual size of major semiaxis a in this embodiment, be 0.46 millimeter than the actual size of semi-minor axis b.Therefore, in the cross sectional shape shown in Fig. 6, has roughly big 14% length than semi-minor axis b (relatively semi-minor axis) relatively than major semiaxis a.

Have actual size in the side view (Fig. 1) at the place, end of the tapered segment 7 of Sewing needles 1 of the present invention on the pinprick side and be roughly 0.69 millimeter thickness, and the actual size of the thickness at shank 3 places between this groove 10 and pin heel is roughly 0.78 millimeter, and the radical length of this groove 10 can be roughly 0.22 millimeter.In vertical view (Fig. 2), along with pin heel side on the part of the adjacent length of groove 10 in the pin thickness of shank 3 be roughly 0.94 millimeter, be roughly 1.01 millimeters from these groove 10 farther thickness of the stems.In the pin cross section that the section plane III-III of Fig. 2 represents, the amplitude peak in the y direction of principal axis of Fig. 3 can be 0.78 millimeter in further preferred embodiment, and amplitude peak is roughly 0.94 millimeter in the x direction.In this situation, the section thickness that exists between the bottom of this wire casing 6 and oval summit S along the y direction can be roughly 0.48 millimeter, and promptly the length of this wire casing 6 is roughly 0.3 millimeter.

Fig. 7 shows the further preferred embodiment that Sewing needles 1 of the present invention amplifies in the vertical view that disconnects.Different as with the embodiment shown in Fig. 1 and 2, the Sewing needles shown in Fig. 7 also has supplemental tank 25 on the other side on the cross section of this shank here except the wire casing 6 that also has.Along the longitudinal direction, this supplemental tank limits by removing material on this pin heel side, removes material in the zone of the shank 3 in relatively large cross section and the circular cone transition portion 26 between the pin heel 2.Represented from the end of this shank 3 to the part of the transition gradually of the pin heel 2 of larger cross-section along the part of the length of Reference numeral 26 expression, the end of this shank 3 is elongated on its whole length, and promptly it is not made for not along keeping identical reinforcement on the part of length.Place, the end that in longitudinal direction, is oppositely arranged, these supplemental tank 25 usefulness projection 27 qualifications, this protruding evagination top be positioned at this ellipse graduation top line 20 the height place and on the pinprick side with groove 10 adjacency.In diagram, this groove can be seen the interval between the firm edge of top line 20 and the main body in the shade breaking part as, and these top line 20 usefulness dash lines are represented and extend into to make diagram clear.Show wire casing 6 and also have tapered removal part in transition portion 26 zones, as in supplemental tank 15, the degree of depth of this groove is not roughly changing on corresponding slot length.In the situation as Fig. 1, elliptical flattening of the present invention is roughly implemented on the whole length of this shank 3.Compare with the embodiment among Fig. 1 and 2, further difference be among Fig. 7 Sewing needles without any with this transition portion 26 (Fig. 1, Reference numeral 3 ' in 2) adjacent bracing piece zone, but adjacent with this transition portion 26 here shank 3 has the roughly cross section uniformly up to projection 27.

Fig. 8 illustrates the amplification profile along hatching VIII-VIII of the preferred embodiment of the Sewing needles of representing by Fig. 7 of the present invention 1.As shown in Figure 9, these identical with Fig. 3-6 in principle architectural features are represented with identical Reference numeral, even have some distortion about the true form of related single feature.For example, for wire casing 6, its bottom land relative Fig. 3 in Fig. 8 moves radially, and the sidepiece 21,22 of this wire casing 6 is steeper, and follows this circular contour 11,12 along the part of girth, roughly leads to the position of side surface up to this wire casing 6.For the position in the cross section of Fig. 8 and 9, notice alignment that the pin cross section shown in it is expressed as making that their are relatively directly obtained by the section VIII-VIII of Fig. 7, dextrorotation turn 90 degrees, thereby makes the position identical with the position of Fig. 3-6.Fig. 8 also shows supplemental tank 25 and is embedded in elliptical flattening second shaped region 14, is arranged in wire casing 6 opposites and is provided with.The same with wire casing 6, this supplemental tank 25 has the rounding bottom land.The sidepiece 28 of this supplemental tank 25,29 have constituted the obtuse angle with the side surface or the oval external boundary 30 of the adjacent elliptical flattening with rounding transition portion, and the transition portion of the correspondence between the sidepiece 21,22 of this wire casing 6 and formed acute angle along the part 11,12 of girth.In addition, know that very supplemental tank 25 will have the slot cross-section less than wire casing 6, the length of its groove and A/F are less than the situation of wire casing 6.

Fig. 9 shows the amplification profile in the shank zone of the preferred embodiment of Sewing needles 1 of the present invention, and the position of this section is identical with Fig. 8.Here the cross section that illustrates is different from Fig. 8's, and is darker wideer because this supplemental tank 25 is made.As shown in Figure 8, this sidepiece 28,29 enters into oval outer boundary 30 by recessed rounding in this situation.Even according to Fig. 9, roughly corresponding to the A/F of wire casing 6, the degree of depth of this groove is less for the clear opening width of this supplemental tank 25.Yet also may there be wire casing and supplemental tank with identical or roughly the same cross section.

Disclosed all features () own all are about of the present invention.The disclosure of relevant priority document (patent application formerly) is introduced for referencial use here fully, comprises that the feature with these files joins in the claim of the present invention.

Claims (16)

1. Sewing needles (1), its shank (3) has at least one wire casing (6) from pin heel (2) extension and at its side surface (4) that extends from needle region (5), wire casing (6) extends to pin heel (2) direction, the pin cross section is at least at first shaped region (13) along the basic configuration that has semicircle in the part of its length, wire casing is inlayed therein, the pin cross section comprises second shaped region (14), this second shaped region (14) is that basic configuration and the mirror image symmetry semicircle of border and this second shaped region (14) is compared the cross section with relative this semicircle baseline (H) horizontal expansion and reduced (c) with this semicircle baseline (H), it is characterized in that, this cross section reduces (c) oval at least outer boundary (15 by this second shaped region (14), 16,17,18) form.

2. Sewing needles according to claim 1 (1), it is characterized in that, be provided with the groove (10) that the pinprick (9) on the needlepoint side extends to pin heel (2) direction, from needle region (5), this cross section reduces (c) and surpasses groove (10) extension to the direction of pin heel (2).

3. one or multinomial described Sewing needles (1) in requiring according to aforesaid right is characterized in that this second shaped region (14) has the basic configuration of half-oval shaped, and its longitudinal axis is consistent with semicircle baseline (H).

4. one or multinomial described Sewing needles (1) in requiring according to aforesaid right is characterized in that this second shaped region (14) has the basic configuration of half-oval shaped, and its lateral shaft is positioned on the straight line identical with the mirror image line of symmetry of this wire casing (6).

5. one or multinomial described Sewing needles (1) in requiring according to aforesaid right, it is characterized in that, this is semielliptical compares the approximately big 5-20% of the length that has, big especially approximately 7%, 10% or 14% than major semiaxis (a) and this are semielliptical than semi-minor axis (b).

6. one or multinomial described Sewing needles (1) in requiring according to aforesaid right, it is characterized in that, from semicircle baseline (4), the boundary shape of this first shaped region (13) on two sides of this wire casing (6) is along the circumferential direction followed semi-circular shape, exceeds the radius of a circle that is set to the tangent part (T) of the cross sectional shape of this wire casing (6).

7. one or multinomial described Sewing needles (1) in requiring according to aforesaid right is characterized in that the wire casing in the pin cross section (6) extends exclusively in this first shaped region (13).

8. one or multinomial described Sewing needles in requiring according to aforesaid right is characterized in that this wire casing (6) has the bottom land (24) of band elevated regions, and this bottom land is rounded in the cross section of pin.

9. one or multinomial described Sewing needles (1) in requiring according to aforesaid right, it is characterized in that, the supplemental tank (25) that has cross section rounding bottom land, this supplemental tank (25) be arranged on roughly be embedded in first shaped region (13) in the relative pin cross section of wire casing (6) in.

10. one or multinomial described Sewing needles (1) in requiring according to aforesaid right is characterized in that, compare the slot cross-section that this supplemental tank (25) has less or approximate same size with this wire casing (6).

11. according to one or multinomial described Sewing needles (1) in the aforesaid right requirement, it is characterized in that, the bottom land of the bottom land of this wire casing (6) and/or this supplemental tank (25) is made for and closely follows circular contour in the cross section, and the diameter of this circular contour is roughly half of length of this semicircle baseline (H).

12. one or multinomial described Sewing needles (1) in requiring according to aforesaid right is characterized in that, the degree of depth of this supplemental tank (25) less than or be substantially equal to the degree of depth of this wire casing (6).

13. one or multinomial described Sewing needles (1) in requiring according to aforesaid right is characterized in that, the net section A/F of this supplemental tank (25) less than or be substantially equal to the net section A/F of this wire casing (6).

14., it is characterized in that the sidepiece of this supplemental tank (25) in the pin cross section side surface of this shank relatively becomes the obtuse angle to extend according to one or multinomial described Sewing needles (1) in the aforesaid right requirement.

15., it is characterized in that this wire casing (6) and/or supplemental tank (25) sidepiece (21,22,28,29) in the pin cross section enters into the side surface of this shank in evagination rounding mode according to one or multinomial described Sewing needles (1) in the aforesaid right requirement.

16. according to one or multinomial described Sewing needles (1) in the aforesaid right requirement, it is characterized in that, truncated cone, preferably the transition portion (26) of circular cone is formed between the bar (3) and pin heel (2) of larger cross-section, has roughly uniform cross-section in the length part of this cross section elliptical flattening bar (3) between transition portion (26) and groove (10).

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