CN2050184U - Intermittence electrifying machinery time device - Google Patents

Abstract

The utility model discloses an intermittence electrifying machinery time device; a cam replaces two synchronized intermittent cams; the cam can be arranged between two clamping plates of a time device. Therefore, the structure of the time device is especially simple. The utility model has the advantages of small size, low cost, which can be arranged in the electric appliance needing a miniature time device and is in particular suitable for being used for an electric fan and a washing machine.

Description

Intermittence electrifying machinery time device

The present invention relates to a kind of timing device, particularly mechanical timer.

Commercially available intermittently power-on mechanical timer, as being the washing machine timer of power source with clockwork spring or motor, speed when determining away by the gearing-down train, by the folding of cam and relevant fixed cycle operator system each switch two contacts of control electric part, make circuit regularly moment break-make.The shortcoming of this timer be arbitrary pause switch two spring leaf parts and on contact, control respectively by being installed in two cams that rotate synchronously on the same wheel shaft, because being installed, two cams that rotate synchronously need bigger space, make the timing device volume bigger, can not be installed in the electrical equipment that needs small-sized timing device (as electric fan etc.); In addition, cost is also higher.

The objective of the invention is to provide a kind of improved intermittently power-on mechanical timer, its volume energy obviously reduces.

The present invention is achieved in that in the timing device travel time system and on a wheel shaft cam (also can claim intermittent cam) is installed, two spring leaf parts of pause switch pressed to respectively, is pressed on two diverse locations of same cam.When this cam rotation, two spring leaf parts movement therewith, make on it two contacts by specific rule moment separately or contact, disconnect, connect thereby make circuit press the rule timing automatic that cam determines, and repeat, form intermittently power-on.Cam profile has unexpected turnover, and its shape can be similar to the shape of ratchet turnover, so the disconnection of circuit, connection promptly are moments.

The present invention replaces two intermittent cams that rotate synchronously with a cam, and therefore, structure is simple especially, and the timing device volume is obviously reduced, and cost reduces, and can be installed in the electrical equipment that needs small-sized timing device, is particularly useful in electric fan, the washing machine.After electric fan uses the present invention, can make electric fan have the intermittently function of pectinid, be fit to people's needs, particularly night needs in bed.Washing machine uses the present invention to reduce cost.

Below in conjunction with example and accompanying drawing the present invention is described in a more detailed discussion.

Fig. 1 is the principle schematic of example 1.

Fig. 2 is the schematic side view of the pith of example 1.

Fig. 3 is the vertical view (from the AA cross-section) of example 1.

Fig. 4 is the principle schematic of example 2.

Fig. 5 is the cam contour figure of some examples.

Example 1 is seen Fig. 1,2,3, continuous cam (15), fork (17), continuous switch (18), main shaft (16), great wheel (12), two take turns (11), clockwork spring (24) etc. is known, in clamping plate (13), the great wheel arbor of the rotatable multi-turn (14) (2) tightens a cover cam (1), be installed in two the spring leaf parts of pause switch (7) on the insulating part (20), (8), simultaneously by the spring force pressure of itself to, be pressed on two diverse locations (3) of same cam (1), (4) on, these two positions place the both sides of spring leaf parts to the vertical line of cam center respectively, two spring leaf parts (7), (8) each have a contact (9) on, (10).The outline line of cam (1) is the part of four repetitions, and each part is made up of an involute urve (25) and a broken line (19), and the distance of two spring leaf parts tops (26), (27) is less than the length of involute urve (25).From Fig. 1 as seen, when same the involute urve (3), (4) that cam (1) is all pressed in two spring leaf parts tops (26), (27) gone up, two contacts (9), (10) contact, circuit is connected.When cam clockwise rotates (can not backwards rotation), (cam radius of pressing to a position increases) constantly rises on spring leaf parts top (27), and spring leaf parts top (26) rises to broken line (19) when dropping to lowest point (cam radius that compresses a position reduces) when locating suddenly, contact (9) descends thereupon and separates with contact (10), circuit moment disconnection.When cam (1) is rotated further, constantly rise on different involute urves simultaneously in spring leaf parts and top thereof (26), (27), and contact (9), (10) keep identical or approximate distance, and circuit is kept off-state.Up to spring leaf parts (7) and top (26) thereof also when rising, spring leaf parts (8) and top (27) thereof arrive broken line (19) and locate to drop to suddenly lowest point (5), make contact (9), (10) contact suddenly, circuit moment connection.At this moment, press to again on same involute urve of cam two spring leaf parts tops (26), (27).So repeatedly, make the circuit intermittently power-on.

Certainly, cam (1) can be installed on the wheel shaft of great wheel arbor (2) any one rotatable multi-turn in addition.Also can to increase one or more different intermittently power-on programs (cam is a kind of program), select to use cam being installed on a plurality of wheel shafts or a plurality of cams being installed on a wheel shaft for people.Cam (1) can be installed between two clamping plate (13), (14) or outside, the structure between two clamping plate is compact, and is simple, more worth recommendation.Spring leaf parts head portion (26), (27) can be formed by the spring leaf bending, also can form by the fixing insulating part of suit on spring leaf; It is insulator that last way must make cam, and then the cam of a way can be insulator or metal.Be metal part and clamping plate (13) that prevent the spring leaf parts, clamping plate post (28) too near and the clamping plate electrification phenomenon takes place, a kind of way is to make the clamping plate the great wheel arbor hole outside as far as possible little, the clamping plate post is tried one's best away from spring leaf parts (see figure 3); Another kind of way is that to make spring leaf parts head portion (26), (27) or clamping plate post (28) be insulator; The third way is to make the spring leaf parts away from the clamping plate plane, and this way can make the timing device volume bigger, is disadvantageous.Power source can be clockwork spring or motor.

The principle schematic of example 2 is seen Fig. 4, but other structure reference example 1.Two pause switches (or two intermittently power-on programs) are made up of respectively (7) in three spring leaf parts, (8) and (8) (21) respectively.Top (26), (27) of spring leaf parts (7), (8) can be pressed on the same cam simultaneously.Spring leaf parts (7) are gone up suit and are fixed with an insulating part (22), and spring leaf parts (21) are compressed on this insulating part (22) by the spring force of itself.Like this, spring leaf parts (21) and on the motion of contact (23) drive by spring leaf (7), and spring leaf parts (8) are clipped between spring leaf parts (21), (7) just at the right time, therefore, contact to the disconnection of (9), (10) connect rule just in time with the disconnection of contact to (10), (23), it is opposite to connect rule.In other words, contact is to (9), when (10) are connected, and contact disconnects (10), (23); Contact is to (9), when (10) disconnect, and contact is connected (10), (23).If circuit is disconnected, turn-on time is unequal, can design two conduction time different intermittently power-on programs, if this two independent wiring of intermittently power-on program and control respectively, freely select in the time of can be for people to use by the switch on the electrical control panel.If these two intermittently power-on programs are connected to two different circuits (as the different wind speed shelves of electric fan) respectively and connect simultaneously, then electrical equipment can alternately show the feature (as the continuous conversion of wind speed) of the different circuits of two program representatives; Utilize the moment conversion of two intermittently power-on programs, can solve the starting problem of the emblem wind shelves of electric fan, promptly a program is a top gear, and a program is emblem wind shelves; Very short when the top gear time, the emblem wind shelves time in fact just can have been regarded emblem wind shelves as for a long time the time.

Fig. 5 is the cam contour figure of some examples.The part that the outline line of cam should have cam radius slowly to increase reaches the part of dwindling suddenly, the available involute urve of a preceding part, helix or the like, back part straight line then commonly used, also not special certainly regulation.It is moment that the basic demand of cam design will make circuit switching process as far as possible, to reduce the infringement of electric spark to contact.Good cam design can provide complicated switching electricity program, solves many practical problemss.For example, the cam design of Fig. 5 C, the principle of reference example 2 can make circuit realize the energising program of washing machine, and promptly forward is switched on → is stopped → oppositely switch on → stop → forward energising, circulation repeatedly.In addition, the distance of spring leaf parts top (26), (27) has confidential relation with the design of the outline line of cam, should note during design; Certainly, the distance of top (26), (27) also can be designed to greater than, be equal to or less than the length of a certain section gradual change outline line of cam.

Claims (4)

1, intermittently power-on mechanical timer, by travel time system (11), power source (24), fixed cycle operator system (15) and electrical switching system formations such as (18), it is characterized in that: on a wheel shaft (2) of travel time system, a cam (1) is installed at least, have at least two spring leaf parts (7), (8) of a pause switch to press to simultaneously respectively, be pressed on two diverse locations (3) of same cam (1), (4), a contact (9), (10) are at least respectively arranged on two spring leaf parts (7), (8), form a pair of contact of pause switch.

2,, it is characterized in that the outline line of cam (1) has unexpected turnover according to right 1 described timing device.

3, according to right 1 described timing device, the wheel shaft (2) that it is characterized in that being equipped with cam (1) is the wheel shaft that can rotate multi-turn.

4,, it is characterized in that cam (1) is installed between two clamping plates (13), (14) according to right 1 described timing device.

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