CN202644141U - Sewing machine thread tension regulating device and sewing machine - Google Patents
Sewing machine thread tension regulating device and sewing machine Download PDFInfo
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- CN202644141U CN202644141U CN 201220215574 CN201220215574U CN202644141U CN 202644141 U CN202644141 U CN 202644141U CN 201220215574 CN201220215574 CN 201220215574 CN 201220215574 U CN201220215574 U CN 201220215574U CN 202644141 U CN202644141 U CN 202644141U
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
- D05B47/02—Manually-controlled tensioning devices
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The utility model discloses a sewing machine thread tension regulating device which is convenient to regulate the spring force of a thread tension regulating spring and a sewing machine. The sewing machine thread tension regulating device (1) comprises the thread tension regulating spring (4) and a movable body (5), wherein the thread tension regulating spring (4) is used for exterting an acting force toward a first thread tension regulating disk (31) to a second thread tension regulating disk (32) so as to regulate the spring force of the thread tension; the movable body (5) can move along the regulating direction of the spring force and is used for regulating the strength of the spring force of the thread tension regulating spring (4). A rotating body (6) is provided with a cylinder part (66) and a plurality of inner teeth; the cylinder part (66) is provided with a conversion mechanism for ensuring the movable body (5) to move along the regulating direction (arrow X direction) of the spring force along with the rotation; and a plurality of inner teeth are formed on the inner peripheral wall of the cylinder part (66) relative to the rotating center in a specified pitch diameter. A thread tension regulating drive plate (7) utilizes the meshing of outer teeth and the inner teeth to reduce the speed along with the rotation and transfer the force to the rotating body (6), so that the rotating body (6) rotates toward the same direction.
Description
Technical field
The utility model relates to a kind of sewing machine thread tension adjusting device and Sewing machines.
Background technology
Patent documentation 1 shows for the sewing machine thread tension adjusting device that line tension is adjusted.This device has: First Line tension adjustment dish; The second line tension adjustment plate; Line tension is adjusted spring, and it has the spring force of the second line tension adjustment plate application of force being adjusted line tension towards First Line tension adjustment dish; Line tension is adjusted driver plate, and it is used for the degree of strength of the spring force of line tension adjustment spring is adjusted; Spring force is adjusted cam, and it is arranged on line tension and adjusts on the driver plate, can adjust spring adjustment to line tension; Transmission plate, it can move to adjust the spring force that spring force is adjusted spring by adjust cam along with spring force; And first adjustment component, itself and transmission plate are threadedly engaged with, and are used for bearing the other end that spring force is adjusted spring.
In addition, patent documentation 2 shows the sewing machine thread tension adjusting device that line tension is adjusted.This device has: line tension is adjusted driver plate, and it is used for adjusting acting on the tension force of reaching the standard grade; And spring force adjustment cam, it is formed at line tension and adjusts on the driver plate, can adjust spring adjustment to line tension.Can access the tension force of expectation by user's manual rotation line tension adjustment driver plate.
Patent documentation 1: TOHKEMY 2008-264065 communique
Patent documentation 2: Japanese kokai publication hei 6-154454 communique
Summary of the invention
In order correspondingly to obtain the line tension expected with making thing, need to line tension be changed by user's manual rotation driver plate.When making the thinner thickness of thing, preferably reduce line tension.When the thickness of making thing is thicker, preferably increase line tension.In order to increase line tension, preferably improve the spring constant that line tension is adjusted spring.But if the spring constant of raising line tension adjustment spring, then the rotation torque of line tension adjustment driver plate becomes large, and the user feels that the rotary manipulation of line tension adjustment driver plate is heavy, thereby feels natural in the rotary manipulation of on-line tension adjustment driver plate.If increase the diameter dimension that line tension is adjusted driver plate, then can alleviate the not nature that line tension is adjusted the rotary manipulation of driver plate, but consider the design of Sewing machines, the enlarged-diameter that line tension is adjusted driver plate has the limit.
The utility model is finished in view of above-mentioned actual conditions, even it is a kind of when improving line tension and adjust the spring constant of spring that its problem is to provide, also be conducive in the maximization of diameter dimension that suppresses line tension and adjust driver plate line tension is adjusted sewing machine thread tension adjusting device and the Sewing machines that the spring force of spring carries out inching.
(1) mode 1 related sewing machine thread tension adjusting device of the present utility model is arranged on the Sewing machines and is used for line tension is adjusted, and this sewing machine thread tension adjusting device comprises: (i) First Line tension adjustment dish; (ii) the second line tension adjustment plate, it is to clamp the mode of line relative with First Line tension adjustment dish with First Line tension adjustment dish; (iii) line tension is adjusted spring, and it has spring force, and this spring force applies towards the active force of First Line tension adjustment dish the second line tension adjustment plate along First Line tension adjustment dish and the second line tension adjustment plate direction close to each other and adjusts line tension; (iv) movable body, it can be adjusted direction along spring force and move, and adjusts for the degree of strength of line tension being adjusted the spring force of spring; (v) rotary body, it is configured to be rotated around pivot, a plurality of internal tooths that have cylindrical portion, make movable body adjust switching mechanism that direction moves and form with the pitch diameter of regulation with respect to pivot at the internal perisporium of cylindrical portion along spring force along with rotation; And (vi) line tension is adjusted driver plate, it is configured to be rotated with respect to rotary body by user's rotary manipulation, possess with the pitch diameter Dout less than the pitch diameter Din of the internal tooth of rotary body form can with a plurality of external tooths of the internal tooth engagement of rotary body, and, along with rotation utilizes the engagement of external tooth and internal tooth that moment of torsion is slowed down and is passed to rotary body, thereby rotary body is rotated towards common direction.
When rotary body was rotated, the rotation of rotary body made movable body adjust direction along spring force by switching mechanism and moves.Thus, line tension is adjusted the degree of strength of the spring force of spring and adjusted, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate is adjusted, and then line tension is adjusted.
When the user was rotated operation to line tension adjustment driver plate, external tooth was adjusted driver plate with line tension and is rotated.So the internal tooth with the external tooth engagement in the rotary body is rotated centered by the pivot of rotary body.At this, the pitch diameter Dout of the external tooth of line tension adjustment driver plate is set as less than the pitch diameter Din of the internal tooth of rotary body.Thereby the number N of teeth out of external tooth lacks than the number N of teeth in of the internal tooth of rotary body.Therefore, line tension is adjusted driver plate becomes drive source, when the external tooth of on-line tension adjustment driver plate and the internal tooth engagement of rotary body, consists of reducing gear.Thereby when the user was rotated operation to line tension adjustment driver plate, the moment of torsion that can make line tension adjust driver plate slowed down and is passed to rotary body.As previously mentioned, when rotary body was rotated, the rotation of rotary body made movable body adjust direction along spring force by switching mechanism and moves.Thus, line tension is adjusted the degree of strength of the spring force of spring and adjusted, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate is adjusted, and then line tension is adjusted.
According to such the utility model, line tension is adjusted driver plate becomes drive source, when the external tooth of on-line tension adjustment driver plate and the internal tooth engagement of rotary body, consist of reducing gear, therefore can carry out inching to the degree of strength that line tension is adjusted the spring force of spring, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate is carried out inching, and then line tension is carried out inching.In this case, compare with the situation that reducing gear is not set, that is, compare with the situation that the user directly makes rotary body be rotated, can adjust efficiently the degree of strength that line tension is adjusted the spring force of spring.
In addition, line tension is to large line tension from childhood in order to obtain, and the preferred high line tension of spring constant of using is as far as possible adjusted spring.And, in the thicker situation of the thickness of the sewn objects such as cloth, preferably improve line tension and adjust the spring constant of spring and increase line tension.But in this case, the rotation torque that the line tension that the user operates is adjusted driver plate becomes large.And, carry out micro-rotary manipulation even only line tension is adjusted driver plate, line tension is adjusted the change of degree of strength of the spring force of spring also can be larger, and the degree of strength that line tension is adjusted the spring force of spring carries out inching and is not easy.That is, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate is carried out inching and be not easy.And then, line tension is carried out inching and is not easy.About this point, according to the utility model, line tension is adjusted driver plate becomes drive source, when the external tooth of on-line tension adjustment driver plate and the internal tooth engagement of rotary body, consist of reducing gear, therefore can carry out inching to the degree of strength that line tension is adjusted the spring force of spring, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate be carried out inching, and then line tension is carried out inching.In this case, compare with the situation that reducing gear is not set, that is, compare with the situation that the user directly makes rotary body be rotated, even it is higher that line tension is adjusted the spring constant of spring, also can adjust efficiently the degree of strength that line tension is adjusted the spring force of spring.
(2) the sewing machine thread tension adjusting device related according to mode of the present utility model 2, wherein, in aforesaid way, line tension is adjusted driver plate and is had the gear that is formed by urceolus section and inner cylinder portion, wherein, by the user this urceolus section is rotated operation, this inner cylinder portion and the coaxial setting of urceolus section, and have external tooth.In this case, driver plate is rotated operation, then line tension is adjusted the internal tooth engagement of external tooth with the rotary body of driver plate if the user adjusts line tension, thus the formation reducing gear, so can carry out inching to the position of movable body.Therefore, the degree of strength that is conducive to line tension is adjusted the spring force of spring carries out inching, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate is carried out inching, and then line tension is carried out inching.
(3) the sewing machine thread tension adjusting device related according to mode of the present utility model 3, wherein, in aforesaid way, line tension is adjusted driver plate, and to be configured to its pivot eccentric with respect to the pivot of rotary body, and the axial end that line tension is adjusted driver plate has and is rotated the concealed surface part that body covers and the exposure part that exposes from rotary body.In this case, line tension is adjusted the pivot of driver plate with respect to the pivot off-centre of rotary body, therefore can suppress the user visually or operate the situation that driver plate and rotary body are obscured of upward line tension being adjusted.If will be formed at the axial end that line tension is adjusted driver plate for the display part that the degree of strength of line tension is adjusted, then the user can the visual identity line tension adjusts the display part of the exposure part of driver plate.
(4) the sewing machine thread tension adjusting device related according to mode of the present utility model 4, wherein, in aforesaid way, the axial end of line tension adjustment driver plate possesses the display part of the degree of strength of expression line tension, and the direction of rotation that the direction of the display part of the degree of strength of expression line tension and line tension are adjusted driver plate is common.Line tension is adjusted the rotary manipulation of driver plate along with the user, the axial end that line tension is adjusted driver plate can partly switch to the exposure part that self-rotating body exposes from being rotated the concealed surface that body covers.Therefore, if on-line tension is adjusted the display part of the degree of strength that is formed for representing line tension on the axial end of driver plate, then the user can visual identity be presented at the display part on the exposure part, thereby can utilize the degree of strength of display part visual identity line tension.In this case, be common because direction and the line tension of the display part of the degree of strength of expression line tension are adjusted the direction of rotation of driver plate, so the user can adjust and not feel unnaturally the degree of strength of line tension.
(5) mode 5 related Sewing machiness of the present utility model possess each the described Sewing machines tension adjusting device in above-mentioned (1)～(4).
Can obtain the effect identical with mode 1.Namely, the user adjusts driver plate to line tension and is rotated operation, line tension is adjusted driver plate becomes drive source, when the external tooth of on-line tension adjustment driver plate and the internal tooth engagement of rotary body, consist of reducing gear, therefore can carry out inching to the degree of strength that line tension is adjusted the spring force of spring, the power of clamping line with First Line tension adjustment dish and the second line tension adjustment plate be carried out inching, and then line tension is carried out inching.In this case, compare with the situation that reducing gear is not set, that is, compare with the situation that the user directly makes rotary body be rotated, high even line tension is adjusted the spring constant of spring, also can adjust efficiently the degree of strength that line tension is adjusted the spring force of spring.
According to the utility model, when the user adjusts driver plate and is rotated operation, line tension and adjusts the internal tooth of the external tooth of driver plate and rotary body and mesh line tension, consist of reducing gear, therefore can carry out inching to the degree of strength that line tension is adjusted the spring force of spring, and then line tension is carried out inching.Owing to being provided with like this reducing gear, therefore compare with the situation that reducing gear is not set, that is, compare with the situation that rotary body is rotated by the user, even it is higher that line tension is adjusted the spring constant of spring, also can adjust efficiently the degree of strength that line tension is adjusted the spring force of spring.And can reduce and line tension is adjusted driver plate be rotated the moment of torsion of operation, line tension is adjusted driver plate feel heavy thereby suppressed the user.
And, according to the utility model, compare with the situation that reducing gear is not set, namely, compare with the situation that rotary body is rotated by the user, even it is high that line tension is adjusted the spring constant of spring, also the moment of torsion of line tension being adjusted driver plate and be rotated operation can be suppressed for less, therefore can adjust efficiently the degree of strength of the spring force of line tension adjustment spring.
Description of drawings
Fig. 1 is the stereogram of wire tension adjustment arrangement.
Fig. 2 is the figure of engagement of external tooth of internal tooth and line tension adjustment driver plate of the rotary body of expression wire tension adjustment arrangement.
Fig. 3 is the figure that schematically shows the switching mechanism of rotary body.
Fig. 4 represents application mode, is the front view with Sewing machines of wire tension adjustment arrangement.
Description of reference numerals
1 sewing machine thread tension adjusting device
2 sewing machine main bodies
240 carriages
31 First Line tension adjustment dishes
32 second line tension adjustment plates
4 line tensions are adjusted spring
5 movable bodys
6 rotary bodies
60 first pivots
62 switching mechanisms
63 cam paths
65 driven members
67 internal tooths
68 axial end
69 display parts
7 line tensions are adjusted driver plate
70 second pivots
8 line tension adjusting nuts
75 axial end
75a concealed surface part
75c exposure part
77 external tooths
78 display parts
79 reducing gears.
The specific embodiment
First Line tension adjustment dish and the second line tension adjustment plate are adjusted line tension in the mode that clips line.Line tension is adjusted spring and is had following spring force: towards First Line tension adjustment dish the second line tension adjustment plate application of force is adjusted line tension along First Line tension adjustment dish and the second line tension adjustment plate direction close to each other.Movable body is set as and can moves along the spring force adjustment direction that the degree of strength of line tension being adjusted the spring force of spring is adjusted.Rotary body is configured to be rotated around pivot, has along with rotation makes movable body to adjust the switching mechanism that direction moves along spring force.A plurality of internal tooths that rotary body has the cylindrical portion that possesses switching mechanism and forms with the pitch diameter of regulation with respect to pivot at the internal perisporium of cylindrical portion.Line tension is adjusted driver plate and is configured to be rotated with respect to rotary body by user's rotary manipulation, possess with the pitch diameter Dout than the little Din of pitch diameter of the internal tooth of rotary body form can with a plurality of external tooths of the internal tooth engagement of rotary body.When the user is rotated operation to line tension adjustment driver plate, utilize the engagement of external tooth and internal tooth to make the rotary speed deceleration of line tension adjustment driver plate and be passed to rotary body, so that rotary body is towards the direction rotation common with the rotation of line tension adjustment driver plate.
(embodiment)
Below, referring to figs. 1 through Fig. 3 embodiment of the present utility model is described.As shown in Figure 1, sewing machine thread tension adjusting device 1 is used for line tension is adjusted, and it remains in the carriage 240 (only illustrating a part) that is installed on the sewing machine main body 2.The line tension that the second line tension adjustment plate 32 that sewing machine thread tension adjusting device 1 has First Line tension adjustment dish 31, face mutually with mode and the First Line tension adjustment dish 31 of clamping line with First Line tension adjustment dish 31, the helical spring that is arranged in roughly coaxial mode by the outer circumferential side at axle 40 form is adjusted spring 4, movable body 5, rotary body 6 and line tension and is adjusted driver plate 7.
First Line tension adjustment dish 31 is fixed on the sewing machine main body 2.The second line tension adjustment plate 32 is configured to face mutually with mode and the First Line tension adjustment dish 31 of clamping line with First Line tension adjustment dish 31.Line tension adjust spring 4 on the direction that the second line tension adjustment plate 32 is approached to First Line tension adjustment dish 31 towards 31 pairs of the second line tension adjustment plates 32 of First Line tension adjustment dish along the arrow X1 direction application of force.Thus line tension is adjusted.Line tension is adjusted and is provided with the line tension adjusting nut 8 that possesses the jog 80 that refers to tactile usefulness at peripheral part between spring 4 and the movable body 5.Might there be the deviation of small level in the spring force of adjusting spring 4 as the line tension of industrial product.Therefore, when dispatching from the factory etc., if producer etc. rotate line tension adjusting nut 8 around its axle center, then can adjust the spring force that line tension is adjusted spring 4.
The movable body 5 of bringing into play function as line tension adjustment plate is set as and can moves along the spring force adjustment direction (arrow directions X) that the degree of strength of line tension being adjusted the spring force of spring 4 is adjusted.As shown in Figure 1, rotary body 6 is configured to be rotated in circumferential (arrow A 1, A2 direction) centered by as the axle 60m of the first pivot 60.Rotary body 6 possesses along with rotation makes movable body 5 adjust the mobile switching mechanism 62 of direction (arrow directions X) along spring force.When rotary body 6 rotated along its all direction (arrow A 1, A2 direction), it is mobile that the rotation of rotary body 6 makes movable body 5 adjust direction (arrow directions X) along spring force by switching mechanism 62.Thus, line tension is adjusted the degree of strength of the spring force of spring 4 and adjusted, so that the power of clamping line with First Line tension adjustment dish 31 and the second line tension adjustment plate 32 is adjusted, and then the line tension of reaching the standard grade is adjusted.
Further describe.As shown in Figure 3, switching mechanism 62 has cam path 63 and driven member 65, and this cam path 63 forms whirlpool shape from one end thereof 63e to another end 63f with respect to the first pivot 60 of rotary body 6, and this driven member 65 relatively is directed along cam path 63.Driven member 65 is arranged to one with movable body 65, although so its can not rotate at arrow directions X top offset with movable body 5.As shown in Figure 3, cam path 63 forms the whirlpool shape with respect to the first pivot 60, so that the distance L between the first pivot 60 and the cam path 63 is along with increasing from an end 63e to another end 63f.At this, as shown in Figure 3, end 63e of the inboard, footpath of cam path 63 and the distance between the first pivot 60 are set as L1.Another end 63f in the outside, the footpath of cam path 63 and the distance between the pivot are set as L2 (L2〉L1).When rotary body 6 when its first pivot 60 rotates along a direction (arrow A 1 direction), cam path 63 centered by the first pivot 60 along the direction rotation identical with rotary body 6, therefore driven member 65 is directed with cam path 63 with engaging and moves to arrow X1 direction, and movable body 5 moves to arrow X1 direction thus.Its result, it is compressed to arrow X1 direction that line tension is adjusted spring 4, and the spring force that line tension is adjusted spring 4 becomes large, and the crimp force of First Line tension adjustment dish 31 and the second line tension adjustment plate 32 increases, and it is large that the line tension of reaching the standard grade becomes.
Therewith relatively, can understand according to Fig. 3, when rotary body 6 when the first pivot 60 rotates along another direction (arrow A 2 directions), cam path 63 rotates along equidirectional around the first pivot 60 with rotary body 6, therefore driven member 65 is directed with cam path 63 with engaging and moves to arrow X2 direction, moves to arrow X2 direction under the effect of the spring force of movable body 5 on-line tensions adjustment spring 4 thus.In this case, line tension adjustment spring 4 extends along arrow X2 direction because of the spring force of self, its result, and the spring force that line tension is adjusted spring 4 diminishes, the crimp force of First Line tension adjustment dish 31 and the second line tension adjustment plate 32 reduces, and the line tension of reaching the standard grade diminishes.
According to present embodiment, as shown in Figure 2, rotary body 6 possesses cylindrical portion 66 and a plurality of internal tooth 67, and this cylindrical portion 66 has outer peripheral face 66s, and these a plurality of internal tooths 67 circumferentially are set up in parallel on the internal perisporium edge of cylindrical portion 66.As shown in Figure 2, at the interior perimembranous formation complete cycle internal tooth 67 of cylindrical portion 66, make its first pivot 60 around rotary body 6 form weeks.As shown in Figure 2, the pitch diameter of internal tooth 67 is illustrated as Din.Consider speed reducing ratio etc., the D outer diameter A that the pitch diameter Din of internal tooth 67 adjusts driver plate 7 than line tension is large.But be not limited to this.
Line tension adjustment driver plate 7 is set as the rotary manipulation that can utilize the user and is rotated around the second pivot 70 of axle 70m, and it is held in the carriage 240 (with reference to Fig. 1) of the sewing machine main body 2 that keeps for the integral body to wire tension adjustment arrangement 1.Line tension is adjusted driver plate 7 and is had: urceolus section 72, and it has along circumferentially (arrow B 1, B2 direction) and extends the jog 71 that arranges with the friction apply that carries out finger tip etc.; Gear 74, it is formed by the inner cylinder portion 73 with urceolus section 72 coaxial settings; And axial end 75 (with reference to Fig. 1), it couples together inner cylinder portion 73 and urceolus section 72.As shown in Figure 2, gear 74 has a plurality of external tooths 77 that can mesh with the internal tooth 67 of rotary body 6.The pitch diameter Dout of the external tooth 77 of gear 74 is set as that (Dout＜Din) little is to slow down than the pitch diameter Din of the internal tooth 67 of rotary body 6.
Can understand according to Fig. 2, when the Zhou Fangxiang of user's tension adjustment driver plate 7 along the line is rotated operation to it, utilize the engagement of external tooth 77 and internal tooth 67, the rotary speed that makes line tension adjust driver plate 7 is slowed down and is passed to rotary body 6, and the common direction of direction of rotation that makes rotary body 6 edges and line tension adjust driver plate 7 is rotated.Thereby, can understand according to Fig. 1 and Fig. 2, when along arrow B 1 direction line tension adjustment driver plate 7 being rotated operation, rotary body 6 is to arrow A 1 direction rotation common with the direction of rotation (arrow B 1 direction) of line tension adjustment driver plate 7.In addition, when along arrow B 2 directions line tension adjustment driver plate 7 being rotated operation, rotary body 6 is to arrow A 2 direction rotations common with the direction of rotation (arrow B 2 directions) of line tension adjustment driver plate 7.
Namely, according to present embodiment, can understand according to Fig. 2, when the user when the second pivot 70 is adjusted driver plate 7 and is rotated operation line tension along arrow B 1 direction, the external tooth 77 that line tension is adjusted the gear of driver plate 7 is rotated linkedly, and the internal tooth 67 that engages with external tooth 77 is rotated along arrow A 1 direction centered by the first pivot 60 of rotary body 6.Its result, movable body 5 and line tension adjusting nut 8 move to arrow X1 direction, make line tension adjust spring 4 and make the second line tension adjustment plate 32 near First Line tension adjustment dish 31 along the equidirectional displacement, thereby adjust the line tension of reaching the standard grade larger.
In addition, when the user when the second pivot 70 is adjusted driver plate 7 and is rotated operation line tension along arrow B 2 directions, the external tooth 77 that line tension is adjusted the gear of driver plate 7 is rotated linkedly, and the internal tooth 67 that engages with external tooth 77 is rotated along arrow A 2 directions centered by the first pivot 60 of rotary body 6.Consequently, movable body 5 and line tension adjusting nut 8 move to arrow X2 direction, make line tension adjust spring 4 along the equidirectional displacement so that the second line tension adjustment plate 32 away from First Line tension adjustment dish 31, thereby adjust the line tension of reaching the standard grade less.
At this, can understand according to Fig. 2, the pitch diameter Dout of the external tooth 77 of line tension adjustment driver plate 7 is set as the pitch diameter Din (Dout＜Din) little than the internal tooth 67 of rotary body 6.Thereby the number N of teeth out of external tooth 77 is less than the number N of teeth in of the internal tooth 67 of rotary body 6 (Nout＜Nin).Therefore, when the user adjusted driver plate 7 and is rotated operation line tension, line tension was adjusted internal tooth 67 engagements of external tooth 77 with the rotary body 6 of driver plate 7, thereby forms the reducing gear 79 that the rotary speed that makes line tension adjust driver plate 7 is slowed down and is passed to rotary body 6.Thereby when the user was rotated operation to line tension adjustment driver plate 7, the rotation that can make line tension adjust driver plate 7 was slowed down and is passed to rotary body 6.And owing to being provided with reducing gear, therefore can suppressing the user and feel that the rotary manipulation of line tension adjustment driver plate 7 is heavier.
At this, according to present embodiment, if the user directly is rotated operation to rotary body 6, then rotary body 6 demonstrates the function of line tension being carried out coarse regulation.If the user directly adjusts driver plate 7 to line tension and is rotated operation, then line tension is adjusted driver plate 7 and is demonstrated the function of line tension being carried out inching.At this, in the time will adjusting line tension, because making the direction of rotation of rotary body 6 and the direction of rotation of line tension adjustment driver plate 7 is common direction, even therefore the user has obscured rotary body 6 and line tension adjustment driver plate 7 and has carried out operation error, also only there are the coarse regulation of line tension and the difference between the fine control and do not have the difference of the direction that the degree of strength of line tension is adjusted, it is hereby ensured operability.
As previously mentioned, when rotary body 6 is rotated, along with its rotation, it is mobile that the rotation of rotary body 6 makes movable body 5 adjust direction (arrow X1, X2 direction) along spring force by switching mechanism 62, can adjust the degree of strength that line tension is adjusted the spring force of spring 4 thus, the power of clamping line with First Line tension adjustment dish 31 and the second line tension adjustment plate 32 is adjusted, and then line tension is adjusted.According to such present embodiment, the external tooth 77 of on-line tension adjustment driver plate 7 forms reducing gear 79 when meshing with the internal tooth 67 of rotary body 6.Therefore, can carry out inching to the degree of strength that line tension is adjusted the spring force of spring 4, the power of clamping line with First Line tension adjustment dish 31 and the second line tension adjustment plate 32 be carried out inching, and then can carry out inching to line tension.In this case, compare with the situation that reducing gear 79 is not set, namely, compare with the situation that rotary body 6 is rotated by the user, can rotate rotary body 6 with little moment of torsion, therefore can be easily and the mobile movable body 5 in pinpoint accuracy ground, thus the degree of strength of the spring force of line tension adjustment spring 4 can be adjusted efficiently, so that line tension is carried out inching.
And as shown in Figure 2, the D outer diameter A that line tension is adjusted the urceolus section 72 of driver plate 7 is set to the pitch diameter Dout that adjusts the external tooth 77 of driver plate 7 greater than line tension.In this case, the rotary distance of the external tooth 77 of gear 74 diminishes at the rotary distance that circumferentially makes line tension adjust urceolus section 72 rotations of driver plate 7 with respect to the user.Under this implication, also can form the reducing gear that the line tension inching is used.
In addition, line tension arrives large line tension in order to obtain from childhood, preferably uses the line tension of the high high rigidity of spring constant to adjust spring 4.And, in the thicker situation of the thickness of the sewn objects such as cloth, preferably improve line tension and adjust the spring constant of spring 4 and make line tension adjust spring 4 hardening to increase line tension.Yet on-line tension is adjusted in the high situation of the spring constant of spring 4, the tendency that the rotation torque that exists line tension to adjust driver plate becomes excessive, and it is heavy that the user feels that line tension is adjusted the rotary manipulation of driver plate 7, it becomes factitious main cause.And, being rotated operation even only line tension is adjusted driver plate, the change of degree of strength that line tension is adjusted the spring force of spring 4 also can significantly change sensitively, and the degree of strength that line tension is adjusted the spring force of spring 4 carries out inching and is not easy.And then line tension is carried out inching may not be easy.And, in order in the spring constant that improves line tension adjustment spring 4, to carry out inching, needing increases the stroke of movable body 5 on the arrow directions X, but the size of movable body 5 on the arrow directions X can maximize, thereby has the problem that is unfavorable for the Sewing machines design.
About this point, according to present embodiment, when by the user line tension adjustment driver plate 7 being rotated operation, when the external tooth of adjusting driver plate 7 when line tension meshes with the internal tooth 67 of rotary body 6, formation makes the rotary speed deceleration of line tension adjustment driver plate 7 and is passed to the reducing gear 79 of rotary body 6, therefore in the situation of the spring constant that improves line tension adjustment spring 4, also can reduce the user line tension is adjusted the moment of torsion that driver plate 7 is rotated operation, thereby adjust the heavy situation of rotary manipulation of driver plate 7 and suppress feeling line tension, and the degree of strength of can be easily line tension being adjusted the spring force of spring 4 carries out inching.Thereby, can carry out inching to the power of clamping line with First Line tension adjustment dish 31 and the second line tension adjustment plate 32, and then line tension is carried out inching.
Therefore, according to present embodiment, with the situation that reducing gear 79 is not set, namely directly the situation that rotary body 6 is rotated is compared with the user, on-line tension is adjusted in the high situation of the spring constant of spring 4, and the degree of strength of also can be efficiently line tension being adjusted the spring force of spring 4 is adjusted.Like this, there is not obstacle when high even line tension is adjusted the spring constant of spring 4 yet, can realizes when improving line tension and adjust the spring constant of spring 4 that therefore line tension adjusts the miniaturization of the axial length direction of spring 4 etc.Certainly, in the situation that the user wants line tension is carried out coarse regulation, the user is as long as directly be rotated operation to rotary body 6.
According to present embodiment, as shown in Figure 1, line tension is adjusted driver plate 7 in the axial end 75 that has by rotary body 6 one sides as the linking part that links urceolus side 72 and inner core side 73.Can understand according to Fig. 2, line tension adjust driver plate 7 be configured to the second pivot 70 with respect to the first pivot 60 of rotary body 6 to upside (arrow U direction side) off-centre.And the axial end 75 that line tension is adjusted the urceolus section 72 of driver plate 7 has and is rotated the exposure part 75c that concealed surface part 75a that body 6 covers and self-rotating body 6 expose.Like this, line tension is adjusted driver plate 7 and rotary body 6 adjacent settings, simultaneously, line tension adjustment driver plate 7 is configured to the first pivot 60 off-centre with respect to rotary body 6, therefore the user can visually distinguish line tension and adjust driver plate 7 and rotary body 6, thereby can suppress both are obscured the problem of operation.Particularly, line tension is adjusted driver plate 7 and is configured to upside (arrow U direction side) off-centre, therefore can obtain the user and be easy to line tension is adjusted the advantage that driver plate 7 operates.
And according to present embodiment, as shown in Figure 1, the axial end 68 of rotary body 6 is exposed to foreign side and possesses display part 69, the degree of strength that this display part 69 is used for the coarse regulation of the line tension that represents to reach the standard grade.The degree of strength that the coarse regulation that the user can utilize display part 69 to identify line tension is used.And the direction of the display part 69 of the degree of strength of expression line tension and the rotary manipulation direction of rotary body 6 are common.That is, when towards arrow A 1 direction rotary body 6 being rotated when operation for splicing thread tension force, the stronger degree of display part 69 expression line tensions.Therefore, the user can be rotated to the rotary body 6 that the tension force coarse regulation is used operation and can not feel not nature.
In addition, according to present embodiment, as shown in Figure 1, the axial end 75 that line tension is adjusted driver plate 7 possesses display part 78, the degree of strength that this display part 78 is used for the inching of the line tension that represents to reach the standard grade.The user can visual identity exposure part 75c the display part 78 used of inching.That is, line tension is adjusted the rotary manipulation of driver plate 7 along with the user, the axial end 75 that line tension is adjusted driver plate 7 can switch to the exposure part 75c that exposes from rotary body 6 from being rotated the concealed surface part 75a that body 6 covers.Therefore, utilize to be formed at the display part 78 that line tension is adjusted the degree of strength that the inching of expression line tension of the axial end 75 of driver plate 7 uses, the user is easy to identify the degree of strength that the inching of line tension is used.And the rotary manipulation direction that the rotary manipulation direction of the display part 78 of the degree of strength of expression line tension and line tension are adjusted driver plate 7 is common.That is, when for splicing thread tension force when arrow B 1 direction is adjusted driver plate 7 and is rotated operation line tension, the stronger degree of display part 78 expression line tensions.Therefore, the user can operate and can not feel nature to the line tension adjustment driver plate 7 that the tension force inching is used.In addition, even just in case line tension is adjusted the rotary manipulation of driver plate 7 to the user and the rotary manipulation of rotary body 6 is obscured operation, because it is common that the direction of the degree of strength of display part 69,78 expression line tensions and line tension are adjusted the direction of rotation of driver plate 7 and rotary body 6, therefore also can suppress obscuring the larger drawback of bringing.
According to present embodiment, can understand according to Fig. 1, the axial end 68 of rotary body 6 exposes towards same direction respectively with the axial end 75 that line tension is adjusted driver plate 7, can be by user's visual identity.Thereby the line tension that is formed at axial end 68 shows that slightly the display part 69 of usefulness and the display part 78 that is formed at the little demonstration usefulness of line tension of axial end 75 expose towards same direction, can be by easily visual identity of user.
(application mode)
Fig. 4 represents application mode.The sewing machine main body 2 of Sewing machines has support section 22, the trailing arm section 23 of extending upward from an end of support section 22, the transverse arm section 24 from the top along continuous straight runs of trailing arm section 23 extends, the shank 25 that pin is installed and the casting die that the lifting of depression bar operates is argued for the sake of arguing 26.Be provided with the regulator 1 that the user operates for the line tension of adjusting the tension force of reaching the standard grade on the carriage 240 of transverse arm section 24.
(other)
According to above-mentioned embodiment, cam path 63 has been used in the straight-line switching mechanism 62 that makes rotatablely moving of rotary body 6 be converted to movable body 5, but be not limited to this, also can be other cams such as druum cam, as long as importantly rotatablely moving of rotary body 6 can be converted to the translatory movement of movable body 5.Line tension is adjusted driver plate 7 and is configured to upside (arrow U direction side) off-centre, but also can be side-prominent to the user one in the face of the Sewing machines front.The utility model is not to be defined in above-mentioned and embodiment illustrated in the accompanying drawings, can suitably change to implement in the scope that does not break away from main idea.
Claims (5)
1. a sewing machine thread tension adjusting device is arranged on the Sewing machines, is used for line tension is adjusted, and this sewing machine thread tension adjusting device comprises:
First Line tension adjustment dish;
The second line tension adjustment plate, it is to clamp the mode of line relative with above-mentioned First Line tension adjustment dish with above-mentioned First Line tension adjustment dish;
Line tension is adjusted spring, it has spring force, and this spring force applies towards the active force of above-mentioned First Line tension adjustment dish above-mentioned the second line tension adjustment plate along above-mentioned First Line tension adjustment dish and above-mentioned the second line tension adjustment plate direction close to each other and adjusts line tension;
Movable body, it can be adjusted direction along spring force and move, and adjusts for the degree of strength of above-mentioned line tension being adjusted the spring force of spring;
Rotary body, it is configured to be rotated around pivot, a plurality of internal tooths that have cylindrical portion, make above-mentioned movable body adjust switching mechanism that direction moves and form with the pitch diameter of regulation with respect to pivot at the internal perisporium of above-mentioned cylindrical portion along above-mentioned spring force along with rotation; And
Line tension is adjusted driver plate, it is configured to be rotated with respect to above-mentioned rotary body by user's rotary manipulation, possess with the pitch diameter Dout less than the pitch diameter Din of the above-mentioned internal tooth of above-mentioned rotary body form can with a plurality of external tooths of the above-mentioned internal tooth engagement of above-mentioned rotary body, and, along with rotation utilizes the engagement of aforementioned external teeth and above-mentioned internal tooth that moment of torsion is slowed down and is passed to above-mentioned rotary body, thereby above-mentioned rotary body is rotated towards common direction.
2. sewing machine thread tension adjusting device according to claim 1, wherein,
Above-mentioned line tension is adjusted the gear that driver plate has urceolus section and formed by inner cylinder portion, wherein, by the user this urceolus section is rotated operation, and this inner cylinder portion is with the coaxial setting of above-mentioned urceolus section and have aforementioned external teeth.
3. sewing machine thread tension adjusting device according to claim 1 and 2, wherein,
Above-mentioned line tension is adjusted driver plate and is configured to its pivot with respect to the pivot off-centre of above-mentioned rotary body, and the axial end that above-mentioned line tension is adjusted driver plate has the concealed surface part of being covered by above-mentioned rotary body and the exposure part that exposes from above-mentioned rotary body.
4. sewing machine thread tension adjusting device according to claim 3, wherein,
The above-mentioned axial end that above-mentioned line tension is adjusted driver plate possesses the display part for the degree of strength of expression line tension, and the direction of rotation of direction and above-mentioned line tension adjustment driver plate of above-mentioned display part that is used for the degree of strength of expression line tension is common.
5. a Sewing machines possesses each the described sewing machine thread tension adjusting device in the claim 1 ~ 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-108329 | 2011-05-13 | ||
| JP2011108329A JP5810620B2 (en) | 2011-05-13 | 2011-05-13 | Sewing thread tension device and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202644141U true CN202644141U (en) | 2013-01-02 |
Family
ID=46146643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220215574 Expired - Fee Related CN202644141U (en) | 2011-05-13 | 2012-05-14 | Sewing machine thread tension regulating device and sewing machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2522767B1 (en) |
| JP (1) | JP5810620B2 (en) |
| CN (1) | CN202644141U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10094056B2 (en) | 2014-09-26 | 2018-10-09 | Abm International, Inc. | Automatic thread tensioning |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3366083A (en) * | 1966-05-26 | 1968-01-30 | Singer Co | Thread tensioning device for sewing machines |
| JPS61106188U (en) * | 1984-12-17 | 1986-07-05 | ||
| JP2536210Y2 (en) * | 1990-04-27 | 1997-05-21 | ジューキ株式会社 | Sewing machine thread tension device |
| JP3314093B2 (en) * | 1992-11-24 | 2002-08-12 | ハッピー工業株式会社 | Sewing machine thread tension adjusting device |
| JP3723970B2 (en) * | 1999-01-18 | 2005-12-07 | ブラザー工業株式会社 | sewing machine |
| JP4789079B2 (en) * | 2000-05-23 | 2011-10-05 | 蛇の目ミシン工業株式会社 | Sewing thread tensioner |
| US6957616B1 (en) * | 2004-12-07 | 2005-10-25 | Tseng Hsien Chang | Restoring device of tension adjusting device for sewing machines |
| JP2007325614A (en) * | 2006-06-06 | 2007-12-20 | Brother Ind Ltd | Thread tension mechanism |
| JP2008264065A (en) * | 2007-04-17 | 2008-11-06 | Brother Ind Ltd | Thread tension guide |
| JP2010022423A (en) * | 2008-07-15 | 2010-02-04 | Juki Corp | Thread tension-adjusting mechanism for sewing machine |
-
2011
- 2011-05-13 JP JP2011108329A patent/JP5810620B2/en not_active Expired - Fee Related
-
2012
- 2012-05-08 EP EP20120167081 patent/EP2522767B1/en not_active Not-in-force
- 2012-05-14 CN CN 201220215574 patent/CN202644141U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012235972A (en) | 2012-12-06 |
| EP2522767A1 (en) | 2012-11-14 |
| EP2522767B1 (en) | 2013-07-31 |
| JP5810620B2 (en) | 2015-11-11 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20200514 |