CN1314509A

CN1314509A - Regulator, particular stick length regulator for sewing machine

Info

Publication number: CN1314509A
Application number: CN 01111623
Authority: CN
Inventors: 格尔德·朗格雷克
Original assignee: Duerkopp Adler AG
Current assignee: Duerkopp Adler AG
Priority date: 2000-03-17
Filing date: 2001-03-16
Publication date: 2001-09-26
Anticipated expiration: 2021-03-16
Also published as: CN1173088C; DE10013414C1

Abstract

The setting unit for a sewing machine, and especially to adjust the stitch length, has a threaded spindle (31) which rotates within a fixed spindle nut (30), coupled to a lever system and mounted to a setting knob (33). It has an indicator ring (35), which rotates around the setting knob (33). A reduction gearing (37) is between the setting knob (33) and the indicator ring (35), as a planetary gearing.

Description

The regulator of Sewing machines is the stitch length regulator especially

The present invention relates to a kind of regulator of Sewing machines, stitch length regulator especially, it is provided with one and is mainly used in the lever system of adjusting stitch length.

By the known a kind of regulator that is used for the sewing needle distance adjuster of DE-GM 1791072 (corresponding to US-PS 2970556), wherein adjusting lever that is provided with cam can be in the turning circle of a regulation, that is adjusts within the limits prescribed.On the plate of a fixed-site, be shaped on scale, so can read the adjusting range of adjusting lever selection and can repeat adjustment.Because it is bigger to adjust error ratio, so can not accurately adjust stitch length.In addition, the shortcoming in operating aspect is that the rotary position of adjusting lever is in the zero-bit both sides all the time symmetrically.

By the regulator of the known a kind of sewing needle distance adjuster of DE-PS 1485431 (corresponding to US-PS 3339509), it has the rotatable adjustment button of a band scale.Be provided with a gear drive, so that limit the adjustment of needle gage adjuster adjusting lever by backstop.

The objective of the invention is to create a kind of regulator, it simple in structure and can read exactly in allow high adjustment precision.

Reach by this stitch length regulator by this purpose of the present invention.It is provided with one and is mainly used in the lever system of adjusting stitch length, be provided with a screw rod, it rotatably is contained in the nut of a fixed-site, and join, and on it, fix an adjustment button, an indicating ring with lever system, it is round adjusting button, and can rotate with respect to adjusting button, and being provided with a decelerator, it will adjust button and indicating ring is connected to each other.The ring gear of a fixed-site is shaped on internal tooth, and it is round gear and the pinion of at least one, and wherein, pinion of at least one and internal tooth mesh.Key of the present invention is, when adjust button and thereby during screw rod rotation multi-turn, almost only revolve around the indicating ring of adjusting button and to make a circle.Therefore might adjust the lever system of Sewing machines by means of screw rod very finely.Screw rod can have the very little screw thread of a kind of pitch, so this screw thread is self-locking.Thereby prevented rotate dangerous of run duration screw rod and thereby avoided adjusting unintentionally this regulator.

Further specify the present invention by accompanying drawing by embodiment below.Wherein:

Fig. 1 has the Sewing machines schematic diagram of regulator;

Fig. 2 is along the partial vertical section of cutting line II-II among Fig. 1 by Sewing machines;

Fig. 3 presses the regulator vertical view of arrow III among Fig. 2;

Fig. 4 presses among Fig. 3 cutting line IV-IV by the sectional view of regulator;

Fig. 5 presses among Fig. 4 cutting line V-V by the cross section of regulator; And

Fig. 6 regulator perspective view.

Represented Sewing machines has one case shape bottom among Fig. 1, and promptly so-called base plate 1, one are from upright chamber 2 and a top horn 3 that base plate is upwards holded up.The shank 4 of the band eedle 5 that can drive up and down is housed in top horn 3 routinely, and it can be by the drive motors of expression be by horn axle 6 drivings that are bearing in the horn 3 among the figure, and horn axle 6 is equipped with handwheel 7 at that end that it is in horn 3 outsides.

Sewing machines is equipped with cloth conveyer 8, and it comprises the presser feet 9 and the feed dog 11 that is contained in base plate 1 needle plate 10 that are contained on the horn 3.Feed dog 11 is usually by drive unit 12 drivings that are located in the base plate 1, and drive unit 12 can be adjusted by adjusting axle 13, can adjust the feeding distance of feed dog 11 thus and thereby can be adjusted at the stitch length that causes in the sewing.Thus much illustrated Sewing machines is actually well-known and widely uses.Drive unit 12 is known by DE-PS 1058820 (corresponding to US-PS 3012531) for example.

Especially as shown in Figure 2, the adjustment of adjusting axle 13 is finished by means of lever system 14.Lever system has a double-arm stitch length adjusting lever 16 on the axle 15 that is located in the upright chamber 2 with being bearing in fixed-site pivotally, its end, and promptly control stick 17, stretch out by the fore side 20 of the hole 18 in 2 walls 19 of upright chamber towards Sewing machines.A hinged strut and tie 21 on the other end of adjusting lever 16, strut and tie 21 be hinged on again a rotation regularly with adjust axle 13 bars that are connected 22 on.

Also have a stitch length regulator in addition, it is contained in the arm 19 equally, and have one can be along 24, one lever-like backstops 25 of its push rod that vertically moves push rod 24 that reclining, and this backstop 25 is fixedlyed connected with adjusting lever 16.The back-moving spring 26 that one of lever system 14 usefulness are designed to tension spring loads, its end is fixed on action bars 17 or the bar 21, be fixed in the upright chamber 2, so lever system 14 and thereby also have and adjust axle 13 and move to and make lever-like backstop 25 abut in position on the push rod 24 other end invariant position.That is to say, under spring 26 effects, as shown in Figure 2, adjust axle 13 clockwise directions and rotate, so adjusting lever 16 is positioned at the termination upwards revolution withershins of upright 2 outsides, chamber.

Regulator 23 has a shell 27, and it detachably is fixed in the bearing 29 that stands in 2 walls 19 of chamber by screw 28.As in the internal thread segment of nut 30 screw rod 31 of a band push rod 24 is installed for one at shell 27, so push rod 24 vertically that is along adjusting direction 32 is adjusted along it when screw rod 31 rotations.For this reason, on screw rod 31, an adjustment button 33 that stretches out upright chamber 2 towards Sewing machines fore side 20 non-rotatably is installed by screw 34.

Face that side of fore side 20 at the shell 27 that becomes jar shape substantially, if one faces shell 27 1 gussets around the indicating ring 35 of adjusting button adjusting button 33, it has the scale of for example writing numeral 1 to 10 on it faces the viewable side 36 of fore side 20, these numerals are corresponding to the stitch length of regulation.

Shell 27, adjust button 33 and indicating ring 35 all is the part of decelerator 37, by decelerator will adjust button 33 also thereby the rotation of screw rod 31 convert the slower rotation of indicating ring 35 to.This decelerator 37 is designed to the planetary gear driver.For this reason, adjust the gear 38 that button 33 has been shaped on the central gear effect.On shell 27, fix a ring gear 39 that internal tooth 40 is arranged.Ring gear 39 is connected with shell 27 with axial jockey 41 by a swivel bearing that can snap in.Jockey 41 is basically by a plurality of, preferably forms along the equally distributed supporting slice 42 of circumference for three, and their insert in annular groove 43.But the supporting slice 42 of elastic deflection is designed to one with shell 27, annular groove 43 then design in indicating ring 35.

Some grooves 44 of design in indicating ring 35, pinion 45 can be rotated to support in groove 44 on the pin 46, and pin 46 is fixed in the ring 35.The pinion 45 that plays the planet gearing meshes on the one hand with built in the gear of adjusting on the button 33 38, and the internal tooth 40 with ring gear 39 meshes on the other hand.Therefore indicating ring 35 plays pinion frame.

Because the ratio of the diameter d of pinion 45 and the diameter D of gear 38, make adjust button 33 and thereby screw rod 31 almost changeed three indicating rings 35 when enclosing and turned around approximately.Because indicating ring 35 should rotate at most less than a whole circle, so establish rotational limit stop 47.It has a design being contained on the indicating ring 35 towards the outstanding pin 49 of shell 27 directions towards the outstanding projection 48 of indicating ring 35 directions and one on the shell 27, as shown in Figure 4, pin 49 is overlapping with projection 48, and abuts on the projection at the terminal location of 35 two regulations of indicating ring.

Comprise indicating ring 35 and shell 27 each personal plastics manufacturing of many annotated funtion parts respectively, and can the funtion part different be designed to one with all these.For the adjustment that makes screw rod 31 flexibly excessive, establish clamping device 50 on nut 30, it can clamp by pinching screw 51, therefore, with nut 30 plastic thereby the comparison easy deformation, can be out of shape in order correspondingly to change frictional force between screw rod 31 and the nut 30.

In order accurately to read the scale that on indicating ring 35 viewable side 36, constitutes, can on the wall above the regulator 23 19, adorn a pointer 52 or make a mark by numeral.

By regulator 23, determine the position of lever system 14, and thereby determine to adjust the position of axle 13 and and then definite stitch length.Rotate when adjusting axle 13 to pressing down adjusting lever 16 when the power by overcoming spring 26, drive unit 12 is commutation in the known manner just, so oppositely sew.

Claims

1. the regulator of Sewing machines, especially stitch length regulator, it is provided with one and is mainly used in the lever system (14) of adjusting stitch length, being provided with-screw rod (31)--it rotatably is contained in the nut (30) of a fixed-site, and--join with lever system (14), and--on it, fix an adjustment button (33),-one indicating ring (35),--it is round adjusting button (33), and--can rotate with respect to adjusting button (33), and be provided with-decelerator (37),--it will adjust button (33) and indicating ring (35) is connected to each other.

2. according to the described regulator of claim 1, it is characterized by: decelerator (37) is designed to planetary train.

3. according to the described regulator of claim 2, it is characterized by: adjust button (33) and be shaped on a gear (38), and indicating ring (35) is provided with at least one pinion (45) conduct and central gear planet gear meshed as central gear.

4. according to the described regulator of claim 3, it is characterized by: the ring gear of a fixed-site (39) is shaped on internal tooth (40), it is round gear (38) and the pinion of at least one (45), and wherein, the pinion of at least one (45) meshes with internal tooth (40).

5. according to the described regulator of claim 1, it is characterized by: it has the shell (27) of a fixed-site.

6. according to the described regulator of claim 4, it is characterized by: it has the shell (27) of a fixed-site, and ring gear (39) is the part on the shell (27).

7. according to the described regulator of claim 5, it is characterized by: nut (30) is the part on the shell (27).

8. according to the described regulator of claim 5, it is characterized by: indicating ring (35) is contained in the shell (27) rotationally.

9. according to the described regulator of claim 8, it is characterized by: indicating ring (35) has an annular groove (43), and the supporting slice (42) of shell (27) inserts in this annular groove.

10. according to the described regulator of claim 9, it is characterized by: supporting slice (42) but elastic deflection.

11., it is characterized by: between indicating ring (45) and shell (27), establish a rotational limit stop (47) according to the described regulator of claim 5.

12., it is characterized by: shell (27) one made of plastic according to the described regulator of claim 9.

13., it is characterized by: indicating ring (35) one made of plastic according to the described regulator of claim 9.

14. according to the described regulator of claim 1, it is characterized by: lever system (14) loads with spring (26), and spring is pressed against lever system (14) on the screw rod (31).

15., it is characterized by: on nut (30), be provided with the clamping device (50) that makes nut (30) distortion according to the described regulator of claim 7.