CN103361904B - Sewing machines - Google Patents

Abstract

The invention provides a kind of Sewing machines.The control substrate of drive motor is installed on sewing machine main body by this Sewing machines.The control substrate of this Sewing machines is arranged in this horn in the mode of one face towards horn inside.Control substrate and covered one face side by inner cover, thus prevent the attachment of dust, wet goods.Heat generating components is configured on another face of control substrate, contacts with the radiator relative with another side, face controlling substrate.On the surface of horn outside, there is fin at radiator.The heating of heat generating components is transmitted to fin via radiator.The outside of fin is formed the air channel component encirclement of air flue.Fin is by carrying out with the air flowed in air flue the heating that heat generating components is reliably dispersed in heat exchange.Therefore, controlling substrate can not be overheated, can normally work.

Description

Sewing machines

Technical field

The present invention relates to the Sewing machines that a kind of control substrate by drive motor is installed on sewing machine main body.

Background technology

Sewing machines has eedle, thread take-up tension lever, cloth conveying teeth and rotating shuttle.The co-operating under the driving effect of motor of eedle, thread take-up tension lever, cloth conveying teeth and rotating shuttle, thus cloth is made.Sewing machines has control substrate.Control substrate to control motor according to the operation of operating personnel.Control substrate and there is power supply unit and motor driving part.Power supply unit and motor driving part have heat generating components.In the Sewing machines of Japanese Unexamined Patent Publication 2009-225973 publication, control substrate is arranged on the outside of pillar across radiator.Radiator by absorbing the heating of heat generating components, and carries out heat exchange with the air of periphery, thus realizes heat radiation.

Control substrate and because of the attachment of dust, wet goods, misoperation can occur.Therefore, with cover, the installation site controlling substrate is covered.Radiator is positioned at the inside of cover.Radiator is to the air heat radiation in cover, and heat can be saved bit by bit in cover, and causes heat dissipation capacity not enough.Thus, existence control substrate is overheated, cannot normally work such problem.

Summary of the invention

The object of the invention is to prevent controlling substrate overheated, and prevent dust, wet goods from adhering to.

The Sewing machines of technical scheme 1 has: motor, and it is arranged on cloth conveying teeth in support and rotating shuttle, the shank being arranged at horn and thread take-up tension lever for driving; And control substrate, it can control the driving of this motor, wherein, above-mentioned control substrate has substrate and heat generating components, this substrate is arranged in above-mentioned horn with one face towards the mode of above-mentioned horn inside, this heat generating components is configured on another face of this substrate, and this Sewing machines has: radiator, and it contacts with above-mentioned heat generating components in another side, face of aforesaid substrate; And fin, its be arranged on this radiator towards on the surface of above-mentioned horn outside.

The substrate controlling substrate is arranged in this horn in the mode of one face towards horn inside.Heat generating components is configured on another face of substrate.Another side, face of substrate is relative with radiator.Radiator contacts with heat generating components, has fin at radiator on the surface of horn outside.The heating of heat generating components is transmitted to fin via radiator.Air outside fin and horn carries out heat exchange.The heating of heat generating components can reliably diffuse to outside horn.Therefore, controlling substrate can not be overheated, can normally work.

The Sewing machines of technical scheme 2 has air channel component, and this air channel Components installation, in another side, face of aforesaid substrate, has the exhaust outlet of air entry in lower opening and opening up, thus forms the air flue in the outside surrounding above-mentioned fin.

Air channel Components installation on another face of substrate, thus forms the air flue in the outside surrounding fin.Fin dispels the heat in the air in air flue.The temperature of the air in air flue rises because of conduct heat away, thus produces ascending air in air flue.Air channel component has the exhaust outlet of air entry in lower opening and opening up.Heat and air-flow are together released from exhaust outlet.Meanwhile, at suction inlet, new air is imported in air flue.Fin and new air carry out heat exchange to dispel the heat.Therefore, it is possible to reliably disperse the heating of heat generating components.

In the Sewing machines of technical scheme 3, cover both the inner cover of side, a face of aforesaid substrate and above-mentioned air channel component or wherein one be the resin with anti-flammability.

Substrate is covered one face side by inner cover, thus prevents the attachment of dust, wet goods.Inner cover, air channel component have anti-flammability.Therefore, it is possible to suppress inner cover, air channel component, when the temperature of heat generating components rises, thermal damage occurs.

In the Sewing machines of technical scheme 4, above-mentioned fin extends towards above-mentioned exhaust outlet from above-mentioned air entry, the height of this fin towards above-mentioned air entry and above-mentioned both exhaust outlets or wherein one reduce continuously.

Fin self-priming gas port extends towards exhaust outlet.Therefore, fin can not hinder the air in air flue to flow.The height of fin reduces towards air entry, exhaust outlet.Therefore, fin can not hinder from air entry air-breathing, from vent.Air in air flue can flow with less loss resistance.Therefore, it is possible to reliably disperse the heating of heat generating components by fin.

Accompanying drawing explanation

Fig. 1 is the stereoscopic figure of Sewing machines.

Fig. 2 is the in-built stereogram of Sewing machines.

Fig. 3 is the in-built front view of Sewing machines.

Fig. 4 is the key diagram that driving belt is wrapping with state.

Fig. 5 is the key diagram of the supporting construction of tensioning pulley.

Fig. 6 is the stereogram of the installation portion controlling substrate.

Fig. 7 is the stereoscopic figure of the Sewing machines seen from rear.

Fig. 8 is the stereogram of the Sewing machines after having pulled down back cover.

Fig. 9 is the sectional view of radiator and air channel component.

Figure 10 is the stereogram of the support seen from below.

Figure 11 is the stereogram of the support being provided with lower cover.

Figure 12 is the stereogram of the relation representing shaft pulley and driving belt.

Figure 13 is the key diagram of the installment state of upper cover plate.

Figure 14 is the stereogram of the support being provided with the irregular lower cover of tool.

Detailed description of the invention

Embodiments of the present invention are described.Used in the following description direction (all around, up and down) represents with arrow in the various figures.

As shown in Figure 1, Sewing machines 1 has support 2, pillar 3 and horn 4.Support 2 has rectangular top board 2a longer in the lateral direction.Pillar 3 extends upward from the right part of top board 2a.Horn 4 extends to the left from the top of pillar 3.The rear side of pillar 3 and horn 4 is covered by back cover 6.The right side of pillar 3 is covered by right cover 7.Back cover 6 and right cover 7 can disassemble.

Support 2 has needle plate 20 in the left part of top board 2a.As shown in Figure 2, support 2 supports lower shaft 22 and rotary shuttle shaft 23 abreast before and after the below of top board 2a.Lower shaft 22 and rotary shuttle shaft 23 are the rotating shafts extended along left and right directions.The right part of lower shaft 22 is linked to motor 24.Motor 24 is fixed in support 2.The left part of lower shaft 22 is linked to cloth pushing table 9 in the below of needle plate 20.Cloth pushing table 9 fixes cloth conveying teeth 10 at an upper portion thereof.Cloth conveying teeth 10 has concavo-convex at an upper portion thereof.Motor 24 drives cloth conveying teeth 10 by lower shaft 22, makes cloth conveying teeth 10 top come and go action rearward to move above needle plate 20, in the mode of the below of needle plate 20 forwards movement.

The left part of rotary shuttle shaft 23 is linked to rotating shuttle 15(with reference to Fig. 3 in the below of needle plate 20).Rotating shuttle 15 rotates under the driving effect of rotary shuttle shaft 23.Rotary shuttle shaft 23 has rotary shuttle shaft belt wheel 33.Rotary shuttle shaft belt wheel 33 embeds the right part being fixed on rotary shuttle shaft 23.Lower shaft 22 has lower shaft belt wheel 32.Lower shaft belt wheel 32 embeds and is fixed on lower shaft 22, is configured in the back lower place of rotary shuttle shaft belt wheel 33.

Support 2 has tensioning pulley 34 therein.Tensioning pulley 34 is positioned at the front of rotary shuttle shaft belt wheel 33.As shown in Figure 5, tensioning pulley 34 is arranged on by supporting plate 35 on the bracket 17 in support 2.Supporting plate 35 can swing centered by the bolster 35a of bottom.Tensioning pulley 34 can rotate centered by rotating shaft 34a.Rotating shaft 34a extends along left and right directions on the top of supporting plate 35.One end of extension spring 18 is linked to the upper end of supporting plate 35.The other end of extension spring 18 is linked to bracket 17.Upper end forwards (direction of arrow in Fig. 5) force of extension spring 18 pairs of supporting plates 35.That is, extension spring 18 pairs of tensioning pulleys 34 exert a force to the direction away from lower shaft belt wheel 32 and rotary shuttle shaft belt wheel 33.

Horn 4 is at the supporting of its left part shank 11, depression bar 12 and thread take-up tension lever 13.Shank 11 and depression bar 12 extend along above-below direction, highlight towards needle plate 20 ground in the below of horn 4.Shank 11 is provided with eedle (omitting diagram) in its bottom.Depression bar 12 is provided with presser feet 12a in its bottom.Thread take-up tension lever 13 highlights in the front of horn 4.

Horn 4 supports axle 21 therein.Upper axle 21 is along the rotating shaft that left and right directions extends in horn 4.The left part of upper axle 21 is linked to shank 11 via needle bar drive device 14, is linked to thread take-up tension lever 13 via thread take-up tension lever driving mechanism (omitting diagram).Shank 11 and eedle are rotated by upper axle 21 and rise, decline.Thread take-up tension lever 13 is rotated by upper axle 21 and swings.Leading section and the shank 11 of thread take-up tension lever 13 and eedle synchronously rises, decline.Depression bar 12 and presser feet 12a rise under the operation of operating personnel, decline.Presser feet 12a after decline presses the cloth on eedle presser 20.Utilize the action of cloth conveying teeth 10 on needle plate 20, rearward carry mobile cloth.

The right part of upper axle 21 is linked to belt shaft 40 via shaft coupling 16.Belt shaft 40 extends along left and right directions.Belt shaft 40 is fixed with handwheel 41 in its right part.As shown in Figure 1, handwheel 41 highlights in the top of pillar 3 in the outside of right cover 7.Operating personnel can utilize handwheel 41 operate upper axle 21 and make it rotate.Shaft coupling 16 has upper shaft pulley 31 integratedly.Upper shaft pulley 31 is positioned at the lower shaft belt wheel 32 of support 2 and the top of rotary shuttle shaft belt wheel 33.

Upper shaft pulley 31, lower shaft belt wheel 32, rotary shuttle shaft belt wheel 33 and tensioning pulley 34 are the toothed belt wheels in periphery with tooth, and they are linked up by a driving belt 25.Driving belt 25 is hung on lower shaft belt wheel 32 in support 2 curls inward, is wrapping with in rotary shuttle shaft belt wheel 33 through tensioning pulley 34.Driving belt 25 extends in horn 4 through pillar 3 inside, is wrapping with in upper shaft pulley 31.As shown in Figure 4, driving belt 25 is that within it side face has internal tooth 25a, has the double-tooth belt of external tooth 25b at its outer peripheral face.Internal tooth 25a is engaged in the tooth of periphery at the first half of the first half of upper shaft pulley 31, the Lower Half of lower shaft belt wheel 32 and tensioning pulley 34.External tooth 25b is at the latter half of tooth being engaged in periphery of rotary shuttle shaft belt wheel 33.

As mentioned above, lower shaft 22 transfers at the driving effect backspin of motor 24 and drives cloth conveying teeth 10, makes cloth conveying teeth 10 come and go action.Lower shaft belt wheel 32 and lower shaft 22 rotate integrally.The rotation of lower shaft belt wheel 32 is delivered to rotary shuttle shaft belt wheel 33 and upper shaft pulley 31 via driving belt 25.Rotary shuttle shaft 23 and rotary shuttle shaft belt wheel 33 rotate integrally, and upper axle 21 rotates integrally with upper shaft pulley 31.

The diameter of rotary shuttle shaft belt wheel 33 is half of the diameter of lower shaft belt wheel 32.Rotary shuttle shaft 23 rotates to drive rotating shuttle 15 around the opposite direction contrary with lower shaft 22 with the speed of the twice of lower shaft 22.Rotating shuttle 15 during cloth conveying teeth 10 comes and goes action in rotate two weeks.The diameter of upper shaft pulley 31 and the equal diameters of lower shaft belt wheel 32.Upper axle 21 to rotate around the direction identical with lower shaft 22 with the speed identical with lower shaft 22 and drives shank 11 and thread take-up tension lever 13.Eedle and thread take-up tension lever 13 synchronously rise with the round action of cloth conveying teeth 10, decline.Sewing machines 1 utilizes the action of cloth conveying teeth 10, eedle, thread take-up tension lever 13 and rotating shuttle 15 to make the cloth on needle plate 20.Motor 24 is configured in support 2.Owing to configuring heavy weight motor 24 at lower position, the center of gravity step-down of Sewing machines 1, thus the vibration of Sewing machines 1 when making can be reduced.And the heating of motor 24 is not easily transmitted to horn 4.The temperature rising degree of horn 4 diminishes, thus can eliminate the uneasiness of the operating personnel touching horn 4.Lower shaft 22, rotary shuttle shaft 23 and upper axle 21 rotate by driving belt 25 interlock.Because driving belt 25 does not need lubrication, therefore, motor 24 can not be attached with lubricating oil, not easily insulation degradation occurs.

Driving belt 25 has internal tooth 25a and external tooth 25b.Internal tooth 25a is engaged in the tooth of the tooth of shaft pulley 31 periphery, the tooth of lower shaft belt wheel 32 periphery and tensioning pulley 34 periphery.External tooth 25b is engaged in the tooth of rotary shuttle shaft belt wheel 33 periphery.Extension spring 18 exerts a force by supporting plate 35 pairs of tensioning pulleys 34.Force towards be away from lower shaft belt wheel 32 and rotary shuttle shaft belt wheel 33 towards.Tensioning pulley 34 applies tension force to driving belt 25 under the force effect of extension spring 18.The tension force of driving belt 25 can strengthen the engagement of internal tooth 25a and the engagement of external tooth 25b.Therefore, the rotation of lower shaft belt wheel 32 can reliably be delivered to rotary shuttle shaft belt wheel 33 and upper shaft pulley 31 via driving belt 25.

Supporting plate 35 also can be exerted a force by the driver except extension spring 18.Tensioning pulley 34 also can be supported in the mode can slided along fore-and-aft direction, is forwards exerted a force by extension spring 18 or driver.

Tensioning pulley 34 is positioned at the front of lower shaft belt wheel 32 and rotary shuttle shaft belt wheel 33.Driving belt 25 contacts with the periphery of angle with lower shaft belt wheel 32 being greater than 90 ° and the periphery of rotary shuttle shaft belt wheel 33.Lower shaft belt wheel 32 is engaged in many internal tooth 25a, and rotary shuttle shaft belt wheel 33 is engaged in many external tooth 25b.Therefore, the pressure putting on each tooth is less.Therefore, the power putting on internal tooth 25a and external tooth 25b is less, and the durability of driving belt 25 rises.

The structure of back cover 6 is described.As shown in Figure 2, back cover 6 has the roughly overall shape covering the rear side of pillar 3 and horn 4.Therefore, can prevent from being escaped to outside pillar 3 and horn 4 with the noise caused that engages of upper shaft pulley 31 by the internal tooth 25a of driving belt 25.The inside of back cover 6 is covered by inner cover 8.Inner cover 8 can disassemble from back cover 6.As shown in Figure 6, back cover 6 is supported with at its roughly whole inner surface and controls substrate 5.Control substrate 5 and there is the power supply unit 51 be configured on substrate 50, motor driving part 52 and Sewing machines control part 53.Control substrate 5 and utilize screw fixing base 50, substrate 50 is bearing on back cover 6.Power supply unit 51 has for the alternating current of source power supply is converted to galvanic circuit.Motor driving part 52 has the circuit for utilizing the DC powered motor 24 after being changed by power supply unit 51.Sewing machines control part 53 has CPU, RAM, ROM etc., is the computer for controlling Sewing machines 1 molar behavior.Power supply unit 51 and motor driving part 52 are to be configured on substrate 50 from pillar 3 inside to the mode the right side of horn 4.Pillar 3 right side mechanical parts that are inner and horn 4 are less, therefore, it is possible to guarantee larger space.Power supply unit 51 and motor driving part 52 have circuit block (transformer, capacitor etc.) highly higher on substrate 50.The circuit block of power supply unit 51 and motor driving part 52 can not configure with the mechanical part in horn 4 and pillar 3 with interfering.As shown in Figure 2, inner cover 8 has the concaveconvex shape consistent with the height of the circuit block on substrate 50.Inner cover 8 is fixed on substrate 50 by screw.Control substrate 5 to be removed together with back cover 6, inner cover 8, and can be checked by dismounting inner cover 8.The whole front surface inner relative with horn 4 of inner cover 8 covered substrate 50.Inner cover 8 plays function as the dividing wall of will keep apart between the inner space of horn 4 and substrate 50, thus prevent dust, wet goods is attached to circuit block on substrate 50.

Power supply unit 51 and motor driving part 52 have heat-generating electronic part 60(and are equivalent to heat generating components).Heat-generating electronic part 60 is rectifier bridge, IPM(SPM) etc.As shown in Figure 9, heat-generating electronic part 60 is arranged on the rear surface of substrate 50 in the mode contacted with radiator 54.Radiator 54 is metal flat boards that thermal conductivity is higher.As shown in Figure 8, radiator 54 is fixed on horn 4 in the mode of a part for covered substrate 50 rear surface (configuration section of heat-generating electronic part 60) by back cover 6.The configuration section of heat-generating electronic part 60 is positioned at the rear surface of the substrate 50 being configured with motor driving part 52.Radiator 54 has the fin 55 extended along above-below direction in its rear surface.Fin 55 is set side by side with multiple in the lateral direction abreast.

As shown in Figure 9, back cover 6 has the air channel component 56 of the rear side of radiator cover 54.Air channel component 56 has the air entry 57 of lower end and the exhaust outlet 58 of upper end, forms air flue 59 between air entry 57 and exhaust outlet 58.Air flue 59 surrounds the outside of fin 55.Air channel component 56 with back cover 6 one or can be arranged independently.Inner cover 8, back cover 6 and air channel component 56 are for having the resin of anti-flammability.The resin with anti-flammability is such as polyvinyl chloride etc.

Heat-generating electronic part 60 produces heat when Sewing machines 1 works.The heating of heat-generating electronic part 60 is transmitted to fin 55 from radiator 54.Fin 55 contacts with the air in air flue 59.Fin 55 carries out heat exchange with contacted air, the heating of heat-generating electronic part 60 is diffused in air flue 59.Air themperature rises because of conduct heat away, thus produces ascending air in air flue 59.In air flue 59, air flows from air entry 57 continuously towards exhaust outlet 58.Due to the rear side of air channel component 56 radiator cover 54, therefore, in air flue 59, the flowing producing air is easy to.Fin 55 contacts with the air flowed in air flue 59, thus reliably can disperse the heating of heat-generating electronic part 60.Air in heat and air flue 59 is together discharged from exhaust outlet 58.Heat-generating electronic part 60 can be reliably cooled under the effect of radiator 54 and fin 55.Fin 55 thereon end has towards the rake of upper end height step-down, has towards the rake of bottom height step-down in its bottom.Rake can reduce that self-priming gas port 57 sucks air, loss resistance when discharging air from exhaust outlet 58.Air enters in air flue 59 from air entry 57 with less resistance.Air flows swimmingly along the fin 55 extended along the vertical direction.Air is discharged from air flue 59 with less resistance through exhaust outlet 58.Fin 55 can contact with a large amount of air, thus can reliably cool heat-generating electronic part 60.

As mentioned above, inner cover 8, back cover 6 and air channel component 56 are for having the resin of anti-flammability.Therefore, not easily there is thermal damage when the temperature of heat-generating electronic part 60 rises in inner cover 8, back cover 6 and air channel component 56.Inner cover 8, back cover 6 and air channel component 56 may not be resin, such as, can be metallic article.

As shown in Figure 10 ~ Figure 12, support 2 has antetheca 2b and rear wall 2c in the below of top board 2a.Antetheca 2b and rear wall 2c extends downwards from the lower surface of top board 2a.Support 2 has the belt wheel receiving room 61 for receiving lower shaft belt wheel 32, rotary shuttle shaft belt wheel 33 and tensioning pulley 34.Surround between antetheca 2b and rear wall 2c with left wall 2d and right wall 2e, and form belt wheel receiving room 61 in the right part of support 2.As shown in Figure 10, left wall 2d has along through hole portion 22d, the 23d of left and right directions.Lower shaft 22 wears via portion 22d across bearing (omitting diagram).Rotary shuttle shaft 23 wears via portion 23d across bearing (omitting diagram).Right wall 2e has along through hole portion 24e, the 24f of left and right directions.The output shaft of motor 24 wears via portion 24e.Motor 24 is positioned at the right side of right wall 2e.That is, motor 24 is positioned at the outside of belt wheel receiving room 61.Hole portion 24f is when assembling for the hole that rotary shuttle shaft 23 passes, and is clogged by rubber stopper (omitting diagram) etc.Antetheca 2b, rear wall 2c, left wall 2d and right wall 2e within it surface are provided with sound absorption part 65.Sound absorption part 65 prevents it from leaking into outside for the sound absorbed in belt wheel receiving room 61.

As shown in figure 11, the bottom of belt wheel receiving room 61 is covered by lower cover 62.The bottom obturation of belt wheel receiving room 61 is got up by lower cover 62, thus prevents foreign matter from entering.Lower cover 62 can disassemble, and within it surface is provided with sound absorption part (omitting diagram).Sound absorption part prevents it from leaking into outside for the sound absorbed in belt wheel receiving room 61.After lower cover 62 is disassembled, driving belt 25 can be wrapping with in lower shaft belt wheel 32, rotary shuttle shaft belt wheel 33 and tensioning pulley 34.

As shown in figure 12, top board 2a has opening 2f in its right back portion.Opening 2f is positioned at the top of belt wheel receiving room 61.Opening 2f be in order to for be wrapping with in upper shaft pulley 31 driving belt 25 through and arrange.As shown in figure 13, opening 2f is covered by upper cover plate 63.Upper cover plate 63 can disassemble, and within it surface is provided with sound absorption part (omitting diagram).Sound absorption part prevents it from leaking into outside for the sound absorbed in belt wheel receiving room 61.After upper cover plate 63 is disassembled, driving belt 25 can be drawn out on top board 2a and be wrapping with in upper shaft pulley 31.After belt shaft 40 and handwheel 41 being disassembled, being wrapping with of driving belt 25 can be carried out.Upper cover plate 63 is cut a part in order to avoid interfering with driving belt 25.

As shown in figure 14, lower cover 62 also can have concavo-convex 64.Concavo-convex 64 can reflect the sound in belt wheel receiving room 61, make to leak into outside sound dispersion from lower cover 62 and come.Concavo-convex 64 also can be formed at antetheca 2b, rear wall 2c, left wall 2d and right wall 2e.

Claims (4)

1. a Sewing machines, this Sewing machines has: motor (24), and it is for driving the cloth conveying teeth (10) and rotating shuttle (15), the shank (11) being arranged at horn (4) and thread take-up tension lever (13) that are arranged in support (2); And control substrate (5), it can control the driving of this motor,

The feature of this Sewing machines is,

Above-mentioned control substrate has substrate (50) and heat generating components (60), and this substrate is arranged in above-mentioned horn with one face towards the mode of above-mentioned horn inside, and this heat generating components is configured on another face of this substrate,

This Sewing machines has:

Radiator (54), it contacts with above-mentioned heat generating components in another side, face of aforesaid substrate; And

Fin (55), its be arranged on this radiator towards on the surface of above-mentioned horn outside.

2. Sewing machines according to claim 1, is characterized in that,

This Sewing machines has air channel component (56), this air channel component (56) is arranged on another side, face of aforesaid substrate, there is the exhaust outlet (58) of air entry (57) in lower opening and opening up, thus form the air flue (59) in the outside surrounding above-mentioned fin.

3. Sewing machines according to claim 2, wherein,

Cover both the inner cover (8) of side, a face of aforesaid substrate and above-mentioned air channel component or wherein one be the resin with anti-flammability.

4. the Sewing machines according to Claims 2 or 3, wherein,

Above-mentioned fin extends towards above-mentioned exhaust outlet from above-mentioned air entry, the height of this fin towards above-mentioned air entry, above-mentioned both exhaust outlets or wherein one reduce continuously.