CN2134695Y - Electrocontrol recorder core state alternative mechanism - Google Patents

Abstract

The utility model relates to an electric control recorder core state selective mechanism, and is composed of driving components of a magnetic head plate and state selection components. A magnetic head plate is driven by an elastic mechanism of a central control cam sliding plate which uses a cam as a core and makes use of a spring to put the magnetic head plate and a selecting shaft on the magnetic head plate at a predetermined position through impelling a sliding plate to advance and fall back. The state selection component is controlled by an electric magnet, drives a lock plate and an iron sheet spring, relieves the locking to the cam, or shifts selecting arms of fast forward and tape rewinding to make the recorder core enter different operating states conveniently with the selecting shaft on the magnetic head plate. The utility model has the advantages of simple structure, precise control theory and reliable operation control and is suitable for various electric control machine cores.

Description

Electrocontrol recorder core state alternative mechanism

The utility model relates to the state selection mechanism of automatically controlled recorder core, and this mechanism is a core with center control cam and electromagnet, utilizes the motion and the electromagnetic actuation temporal differences of headplate, makes movement enter playback, F.F., rewinding, state such as stops.

In the automatically controlled recorder core of existing boxlike, the movement state enter promotion by cam, during design, the cam curve lift during according to difference in functionality the displacement of headplate determine that this mechanism knows that altogether the problem that causes thus is: 1, Design of cam curves complexity, on the general cam a plurality of radius of clean-up to be set, sometimes limit because of size, also a plurality of cams will be set, corresponding its control is also very inconvenient; 2, during the movement state exchange, certainly will stride across the third state, cause the play of tape; 3, except that the headplate actuating cam, also to design the cam that switches driving-chain, quality of fit requires very high between two kinds of cams.

The purpose of this utility model be to avoid above-mentioned weak point of the prior art and a kind of simplicity of design is provided, control is convenient, state exchange stable, mechanism easy to manufacture.

The purpose of this utility model can reach by following measure: this automatically controlled recorder core state selection mechanism, its special character are to be grouped into by headplate promotion part and state selection portion.Headplate pushing part branch comprises center control cam, slide plate and tension spring, center control cam is provided with the gear of a band hypodontia, gear and flywheel gear engagement are with transferring power, simultaneously can also be locked in two hypodontia positions, the axle that one velamen cam promotes is housed on the slide plate, two place's spring carrier arms also are set on slide plate, a spring links to each other with headplate, in order to the headplate of leaving behind, another root spring links to each other with the basal disc seat, in order to tow back to slide plate, state selection portion branch comprises electromagnet, connecting rod, jam plate, the iron plate spring, arm is selected in F.F. and rewinding, chosen axis, electromagnet is located at normally open as control element, connecting rod links to each other with jam plate with electromagnet, jam plate one end is provided with a projection and controls cam in order to locked-center, other end riveted joint has an iron plate spring, select arm in order to stir F.F. and rewinding, F.F. and rewinding are selected to be equipped with an inclined-plane on the arm, after chosen axis is pressed in this inclined-plane, can will select arm to place chosen position, select the other end of arm to be provided with the projection of stirring the neutral gear arm, after selecting the arm action, projection can be stirred the neutral gear arm, power is passed on the reel, chosen axis is riveted on the headplate, along with the motion of headplate presses down together, at precalculated position triggering selection arm.

Fig. 1 is a halted state planimetric map of the present utility model.

Fig. 2 is a halted state ground plan of the present utility model.

Fig. 3 is that the utility model is selected the part schematic diagram.

Fig. 4, Fig. 5 are the utility model tone playing state planimetric maps.

Fig. 6, Fig. 7 are F.F. state plane figures of the present utility model.

Fig. 8 is a rewinding state plane figure of the present utility model.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Among Fig. 1,2, after movement power passes to pulley 2 by motor 1, divide major and minor belt to spread out of, main belt 3 passes on the flywheel 4, gear 4a is housed on the flywheel 4, and gear 4a drives TU gear 28 in tone playing state, driving center control cam 15 in state conversion process, secondary belt 9 passes to power on the center wheel assembly 10, and this assembly finally passes on the gear 10a by the felt friction.

Under shown position, headplate 26 falls back on most significant digit, and pinch roller 7 does not contact with capstan 5, and around all unpowered driving of rolling wheel 8 and 11, so movement is in halted state.

Fig. 4,5 is the planimetric map of movement tone playing state.This moment, headplate 26 was depressed, and pinch roller 7 and capstan 5 frictions pinch tape running.TU gear 28 with flywheel gear 4a with around rolling wheel 8 engagements, makes around rolling wheel 8 winding simultaneously.

Enter tone playing state from halted state: electromagnet 25 engagements, driving jam plate 22 by connecting rod 24 clockwise rotates around axle 23, after the locking of releasing to center control cam, cam promotes spring 14, owing to be pressed on the cam curved surface, its tangential force promotion center control cam surpasses toothless portion), enter the engagement that continues with gear 4a, up to being locked in next hypodontia position, be driven in the process at cam, cam 15a impeller-hub 16a is because of end slot 16e before the slide plate 16 is contained on the axis of guide (not drawing among the figure), axle 16a is enclosed within again on the gathering sill (not shown) of basal disc seat, slide plate can only move forward and backward, up to shown position, because the pulling force of spring 17, headplate 26 is left behind, and spring 18 also is elongated.The stroke design that the stroke of headplate puts in place by magnetic head.Because headplate arrives playback position, the pinch roller spring that is contained on the headplate is pressed on the pinch roller arm thereupon together, and pinch roller 7 is pressed on the capstan 5, with the capstan frictional rotation, pinches tape by the playing speed tape transport.Belt wheel 27 is stirred TU arm (not drawing among the figure) in the process of pressing down, TU gear 28 is rotated around capstan together, and around rolling wheel 8 engagements, drives around the rolling wheel take-up.

Controlling the above action request electromagnetic actuation time should be not oversize, and before chosen axis 29 arrives rewinding selection arm 20 (Fig. 3), electromagnet should disconnect, but also the reaction time that will stay selection mechanism to restore.

Fig. 6 and Fig. 7 are in the planimetric map of F.F. state for movement.Compare with playback, headplate 26 slightly improves, reason is that the chosen axis 29 on the headplate is selected arm 19 to lift by F.F., after headplate lifts, pinch roller can not contact with capstan, the TU gear also breaks away from and meshes around rolling wheel, and above-mentioned selection arm shifts F.F. gear 12 with gear 10a with around rolling wheel 8 engagements onto.

Its course of action is similar to the former, headplate presses down in the process, when detecting between chosen axis 29 arrival F.F.s selection arms 19 and the rewinding selection arm 20, electromagnet is adhesive once more, and F.F. selects arm and rewinding to select arm to be contained in axle 30, and can rotate around the latter, therefore, after iron plate spring 21 was stirred F.F. selection arm 19, the selected axle 29 of the latter was pressed on the inclined-plane 19a, and electromagnet disconnects.Along with the rotation of center cams and the promotion of slide plate, spring 17 is finally left behind headplate, to shown position.And chosen axis 29 finally is pressed on the circular arc 19b along inclined-plane 19a.

Center control cam is locked in the position identical with playback, and slide plate 16 also is pulled to the bottom, because the headplate of this moment lifts because of selected arm 19 location circular arc 19b, spring 18 is further elongated.

Another protuberance 19c of F.F. rewinding this moment arm promotes F.F. gear arm, and the F.F. gear is passed to power on rolling wheel, and movement enters the F.F. state.

Planimetric map when Fig. 8 is in rewinding for movement.

Identical at rewinding state headplate height with the F.F. state, pinch roller is same break away from around the contacting of rolling wheel, power passes on the center wheel assembly 10 by secondary belt, then by gear 10a driving around rolling wheel 11 quick winding.

When halted state entered the rewinding state, electromagnet adhesive always was pressed in to chosen axis 29 and just disconnects after rewinding selects inclined-plane, the back 20a of arm 20 to go up.Because electromagnetic actuation is removed the locking of centring cam on the one hand, simultaneously to making iron plate spring 21 select rewinding arm 20 to push selecteed state.

As hereinbefore, center cams promotes headplate and presses down, and last cam 15 is locked in shown position.

After selecting arm to be pushed shown position, its other end (not drawing among the figure) is stirred centre wheel arm 31, makes central gear 10a and meshes around rolling wheel 11, enters the rewinding state.

Movement is from playback, and F.F., rewinding state enter halted state: because control cam in center all is locked in same position under the three kinds of states in front, slide plate also is pulled to bottom, thereby the method that they enter halted state is identical.

Electromagnetic actuation, make the cam release, because the pulling force of spring 18, act on the cam 15a by the axle 16a on the slide plate, thereby produce one of tangential force, this component actuating cam is crossed over toothless portion), and cam and gear 4a are meshed again, with the rotation of center cams, up to the toothless portion) that is locked in stop position.In this process, cam curve is in backhaul, and slide plate 16 is retracted by spring 18, and slide plate projection 16d is with the headplate pushed home, and all driving-chains all are cut off, and pinch roller also is lifted, up to entering halted state.

As mentioned above, selection mechanism of the present utility model is the power that utilizes motor, promotion center control cam, utilize the lift of cam to promote slide plate, utilize spring on the slide plate headplate of leaving behind, in the magnetic head motion process, stir the iron plate spring by electromagnetic actuation, utilize the iron plate spring to stir F.F. and the different time of rewinding selection arm and the chosen axis on the headplate, make movement enter corresponding selection mode.

The utility model and prior art contrast have following advantage: simple in structure, control principle is very clear, and action control is reliable, is suitable on the various automatically controlled movement.

Claims (3)

1, a kind of automatically controlled recorder core state selection mechanism, the utility model feature are to be grouped into by headplate promotion part and state selection portion.

2, automatically controlled recorder core state according to claim 1 selection mechanism, it is characterized in that headplate pushing part branch comprises center control cam, slide plate and tension spring, center control cam is provided with the gear of a band hypodontia, gear and flywheel gear engagement are with transferring power, simultaneously can also be locked in two hypodontia positions, the axle that one velamen cam promotes is housed on the slide plate, two place's spring carrier arms also are set on slide plate, a spring links to each other with headplate, in order to the headplate of leaving behind, another root spring links to each other with the basal disc seat, in order to tow back to slide plate.

3, automatically controlled recorder core state according to claim 1 selection mechanism is characterized in that state selection portion branch comprises electromagnet, connecting rod, jam plate, iron plate spring, F.F. and rewinding selection arm, chosen axis; Electromagnet is located at normally open as control element, and connecting rod links to each other with jam plate with electromagnet; Jam plate one end is provided with a projection and controls cam in order to locked-center, other end riveted joint has an iron plate spring, select arm in order to stir F.F. and rewinding, F.F. and rewinding are selected to be equipped with an inclined-plane on the arm, after chosen axis is pressed in this inclined-plane, can will select arm to place chosen position, select the other end of arm to be provided with the projection of stirring the neutral gear arm, after selecting the arm action, projection can be stirred the neutral gear arm; Power is passed on rolling wheel, and chosen axis is riveted on the headplate, along with the motion of headplate presses down together, at precalculated position triggering selection arm.

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