CN100414256C

CN100414256C - Speed sensor

Info

Publication number: CN100414256C
Application number: CNB2006100497965A
Authority: CN
Inventors: 竺韵德; 王卫
Original assignee: Ningbo Yunsheng Co Ltd
Current assignee: NINGBO YUNSHENG ELECTRONIC CONTROL TECHNOLOGY CO., LTD.; Ningbo Yunsheng Co Ltd
Priority date: 2006-03-10
Filing date: 2006-03-10
Publication date: 2008-08-27
Anticipated expiration: 2026-03-10
Also published as: CN1818567A

Abstract

The present invention relates to a speed sensor which comprises an operating part, a torsion spring, a fixing plate, a shaft, a rocking arm and a photoelectric control plate, wherein the shaft penetrates through the fixing plate, both ends of the shaft are respectively fixed to the operating part and the rocking arm, the operating part is angularly connected with a control rod and one end of a resistance rod, a shaft hole of a connected position is provided with an extending section, the side edge of the other end of the operating rod is fixedly positioned on a photoelectric sheet between two photoelectric control switches on the photoelectric control plate, the other end of the control rod leads a regulating sheet whose side edge is provided with two layers of grooves to be fixed, one spiral end of the torsion spring is inserted into one groove of the regulating sheet, the other spiral end is sheathed on the extending section of the operating part and is limited on a fixing plate, one active edge of the torsion spring is leaned against a limited post on the fixing plate, and the other active edge is positioned in the other groove of the regulating sheet. The present invention has the advantages of simple product structure, simple and convenient installation, and low production cost. The present invention can ensure that the speed sensor is clean.

Description

Speed pickup

Technical field

The present invention relates to a kind of speed pickup, the speed pickup that particularly a kind of industrial sewing machine is used.

Background technology

The speed pickup of using on the existing industrial sewing machine comprises the photoelectric control plate, the control piece (not shown), fixed head 4, automatically controlled making sheet of a side fixed light and control piece at fixed head 4, control piece links to each other with the opposite side rocking arm 10 of fixed head by axle 111; proximal ends of rocking arm 10 is location rocking arm 10 by extension spring 101 tensions; the resistance transfer device is set on the fixed head 4 at respective rocker arm 10 middle parts; described resistance transfer device is by limited block 108; motion bar 109; interior outer spring 105; 103 and last steady arm 102 form; motion bar 109 1 ends lean against on rocking arm 10 arms; the other end presses closer inner spring 105; middle part has spacing preiection 107 spacing on limited block 108; other end of inner spring 105 is by last steady arm 102 location; inner spring 105 overcoat outer springs 103; outer spring 103 1 ends are fixed with the banking stop 106 that leans against on the limited block 108, and the other end is limited by last steady arm 102.

When pressing lower shake-changing arm, the control piece rotation that rocking arm drives the fixed head another side changes the signal of photoelectric control plate downwards, and at this moment, rocking arm can be subjected to the resistance of extension spring and tangible sensation is arranged on rocking arm.

When pushing to rocking arm; rocking arm top is gone up the motion bar on adjacent its side arm and upwards compressed inner spring; the therefore increase of obviously feeling elastic force on rocking arm; when motion bar is run into the banking stop that is fixed on the outer spring, the control piece and the photoelectric control plate that are in the fixed head opposite side are in another state of a control again; Continue upwards to promote rocking arm, inner spring can be oppressed outer spring, so the resistance that rocking arm is subjected to is bigger, feels also more obvious again.From as can be seen last, the variation of state of a control and rocking arm pressure change consistent, make the operator feel the variation of mode of operation from change in resistance.

Above-mentioned speed pickup because produce the resistance transfer device of resistance sensation and rocking arm in the same side, even the therefore opposite side sealing of band control circuit board, this side of band rocking arm also is difficult for whole sealing, cause the easy dust stratification of resistance sensing device thus, can influence the performance of speed pickup in the course of time.Also, trouble is installed because the resistance transfer device adopts the dual spring structure, and total has adopted three springs, causes the total more complicated, so the production cost height.

Summary of the invention

Technical matters to be solved by this invention is to overcome the above-mentioned deficiency of prior art and a kind of speed pickup is provided, and its structure is more simplified, and also can better seal.

The present invention solves the problems of the technologies described above the technical scheme that is adopted:

Speed pickup, comprise operating parts, torsion spring, fixed head, axle; rocking arm; photoelectric control plate; described axle passes fixed head; its two end is fixing operation part and rocking arm respectively; described operating parts is by control lever and angled connection of drag strut one end; and in axis hole band one extension of junction; the other end side of described control lever fixedly places the photoelectricity sheet between two photoelectric control switchs on the photoelectric control plate; the adjustment sheet of two layers of groove of other end fixation side sideband of drag strut; torsion spring one end that spirals is inserted in the groove of adjustment sheet; another spirals to hold and is enclosed within on the extension of operating parts; and be limited on fixed head one side; an active edges of torsion spring leans against on the limited post on the fixed head, and another active edges places another groove of adjustment sheet.

Compared with prior art, the invention has the advantages that: when the various control state during adjustment state changes, have different resistances to pass to rocking arm, so the operator just has tangible resistance sensation when carrying out different operations, be convenient to operator's operation.Entire product is simple in structure, so simple installation, and production cost is low, and photoelectric control plate and resistance transfer device can wholely seal, and can guarantee that speed pickup keeps clean.

Description of drawings

Fig. 1 is the structural representation of existing speed pickup;

Fig. 2 is the exploded view of the embodiment of the invention;

Fig. 3 is the stereographic map of the embodiment of the invention;

Fig. 4 is the stereographic map of the other direction of the embodiment of the invention;

Fig. 5 is the initial state of a control figure of the embodiment of the invention;

Fig. 6 is a state of a control figure of the embodiment of the invention;

Fig. 7 is another state of a control figure of the embodiment of the invention;

Fig. 8 is the another state of a control figure of the embodiment of the invention.

Fig. 9 is an embodiment of torsion spring of the present invention.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As shown in Figure 2, speed pickup comprises operating parts 1, torsion spring 2, fixed head 4, axle 5, rocking arm 6, photoelectric control plate 7, and rocking arm 6 and operating parts 1 are each defined in two sides of fixed head 4 by axle 5.

Aforesaid operations spare 1 is made up of control lever 11 and drag strut 12, control lever 11 and angled connection of drag strut 12 1 ends, and in the axis hole of a junction extension 13 in addition, be used to place one of torsion spring 2 spiral the end 21, and shimming 3 is fixed on torsion spring 2 on the extension 13 of operating parts 1 the control lever 11 middle magnet steel 15 that are placed with.

Above-mentioned control lever 11 1 ends are established control strip 8, and control strip 8 can be provided with separately, be fixed on control lever 11 1 ends 14 by screw or other modes again, or directly and control lever 11 be made of one.Two

light barriers

81,82 are arranged on the control strip 8, and corresponding two

optoelectronic switches

71,72 are corresponding on the spacing of the width of light barrier and two light barriers and the control panel 7, also have Hall switch 73.

Above-mentioned drag strut 12 1 ends are established torsion spring frame 9, and torsion spring frame 9 can be provided with separately, are fixed to drag strut 12 1 ends by screw or other modes again, or directly and drag strut 12 be made of one.Establish two elongated holes on the torsion spring frame 9, one of elongated hole 92 placement torsion springs 2 spiral and hold 22, so this elongated hole 92 is longer, and another elongated hole 91 is placed the movable end 23 of torsion springs, so this hole is shorter.These two holes are parallel and the width hole is less, prevent that torsion spring 2 from rotating when stressed.

Said fixing plate 4 one sides are fixing control panel 7 also, and another movable end 24 of torsion spring 2 is attached to stopping on the post 41 on the fixed head 4, and another end 22 that spirals is attached to and stops on the post 42 that movable end 23 opposite sides of torsion spring 2 have the post of stopping 43.

The another side of said fixing plate 4 just stops after rocking arm 6 is upwards run into limited block 45 apart from having

limited block

44,45 on rocking arm 6 certain distances; Also stop after running into limited block 44 downwards, prevent from so excessively torsion spring to be damaged by pressure or causes axle 5 skid with rocking arm 6, operating parts 1, and control strip 8 is deviate from control panel 7 and influence control, even damage control strip 8 because of exerting oneself at the rocking arm place.

Above-mentioned rocking arm 6 one end

band handle holes

61,62, handle

hole

61,62 link to each other with control gears such as pedals respectively.Be easy disassembly rocking arm 6,, and, see Fig. 4 by screws clamp also at the axis hole one side strap clamp tieholen 63 of rocking arm 6.

Whole speed pickup assembling back becomes Fig. 3.

Above-mentioned torsion spring 2 spirals and holds 21,22 can also be a circle, as shown in Figure 9, also multi-turn can be arranged, even can also be single U-shaped circle (not shown).

After being installed to the present invention on the industrial sewing machine; when rocking arm 6 is motionless;

optoelectronic switch

71,72 one-tenth one state of a controls on the

light barrier

82,81 of the control strip 8 on the control lever 11 of operating parts 1 and the circuit board 7; movable end 23 of torsion spring 2 is attached to an end of elongated hole 91; end 22 that spirals of torsion spring 2 is attached to the other end of elongated hole 92; 2 one-tenth tensioning states of whole torsion spring, sees Fig. 5, and torsion spring 2 left-right rotation all produce elastic force.

When the rocking arm 6 that turns left; rocking arm 6 drives operating parts 1 rotation of the other ends by axle 5; after the control lever 11 on the operating parts 1 rotates thereupon; the

light barrier

81,82 of the control strip 8 of one end changes with the position of the

optoelectronic switch

71,72 of control circuit 7 and produces a different control signal and remove to control motor or other circuit; the Hall switch 73 of the magnet steel 15 on the control lever 11 on control panel is more and more approaching, has just produced signal for faster.Meanwhile, drag strut 12 rotates the movable end 23 that drives torsion spring 2 and rotates together, torsion spring 2 place elongated hole 92 spiral the end 22 be obstructed bumping post 42 prevention and produce tangible resistance, this moment, control strip became another state of a control with optoelectronic switch on the control panel, promptly send another control signal, therefore this control signal changes can produce the sensation of tangible change in resistance on rocking arm 6, thereby is convenient to the variation of operator's decision operation state, as shown in Figure 6.

When rocking arm 6 continued to turn left, rocking arm 6 was run into stopper 44 and is stopped, thereby prevents to damage operating parts 1 because of Overexertion.

In like manner, when turning right rocking arm 6; rocking arm 6 drives operating parts 1 to right rotation; the control lever 11 on the operating parts 1 rotates thereupon; cause the light barrier 81 on the control strip 8 of control lever 11 1 ends; 82 with the optoelectronic switch 71 of control circuit 7; 72 position changes again; meanwhile; drag strut 12 rotates; need overcome torsion spring 2 because of movable end 24; end 22 that spirals is obstructed and the screen resilience that produces; cause the movable end 23 that places elongated hole 91 and run into the other end in hole 91 and be obstructed; this moment, control strip became another state of a control with optoelectronic switch on the control panel; promptly send another control signal; so can obtain sensation than obvious increase resistance previous stage when producing this control signal variation on the rocking arm other direction, is convenient to the variation of operator's decision operation state, as shown in Figure 7.

Rocking arm 6 continues to turn right; rocking arm 6 drives operating parts 1 to be continued to turn right; the control lever 11 of operating parts 1 drive control strip 8 on it continue with control panel 7 on optoelectronic switch depart from; the movable end 23 of torsion spring 2 is subjected to stopping stopping of post 43; so the movable end 24 of drag strut 12 except overcoming torsion spring 2; outside the resistance of the end 22 that spirals; also need overcome torsion spring movable end 23 and run into the resistance that stops post 43; this power is delivered to rocking arm 6 makes the operator feel bigger than previous stage; more obvious change in resistance; the light barrier 81 on this moment control strip; 82 with optoelectronic switch 72; 71 constitute another state of a control; remove to control and change the state of motor or other circuit, see Fig. 8.

When continuing to turn right rocking arm 6, rocking arm 6 is run into stopper 45 and is stopped, thereby prevents to damage operating parts 1 because of Overexertion again.

Conceive according to foregoing invention; the present invention can also have multiple variation; control lever 11 as operating parts 1 is made integral body with drag strut 12, and torsion spring also can adopt the elastic body that can produce different elastic force at diverse location of other types, and these variations all fall into protection scope of the present invention.

Claims

1. speed pickup, it is characterized in that: comprise operating parts, torsion spring, fixed head, axle; rocking arm; photoelectric control plate; described axle passes fixed head; its two end is fixing operation part and rocking arm respectively; described operating parts is by control lever and angled connection of drag strut one end; and in axis hole band one extension of junction; the other end side of described control lever fixedly places the photoelectricity sheet between two photoelectric control switchs on the photoelectric control plate; the adjustment sheet of two layers of groove of other end fixation side sideband of drag strut; torsion spring one end that spirals is inserted in the groove of adjustment sheet; another spirals to hold and is enclosed within on the extension of operating parts; and be limited on fixed head one side; an active edges of torsion spring leans against on the limited post on the fixed head, and another active edges places another groove of adjustment sheet.

2. speed pickup as claimed in claim 1 is characterized in that: the another side of described fixed head is apart from having limited block on the rocking arm certain distance.

3. speed pickup as claimed in claim 1 or 2 is characterized in that: the axis hole one side strap clamp tieholen of described rocking arm, and by the screws clamp axle.

4. speed pickup as claimed in claim 1 or 2 is characterized in that: described torsion spring is the end zone circle that spirals, and another end that spirals is U-shaped.

5. speed pickup as claimed in claim 3 is characterized in that: described torsion spring is the end zone circle that spirals, and another end that spirals is U-shaped.