DE1916564A1 - Electric switch - Google Patents

Description

DB-ING. . DtPl ₁₁₁ INGlK) LUeC. . - ^V DIfU-PaZS ₁ DR. ". DIPL.-PHYS.

HÖGER - LEGAL RIGHT- GRIESSBACH - HAECKER

PATENT LAWYERS IN STUTTGART

3? 2-81 h '

27. 3. I.

Ital. 36098 ~ A / 68. '

TEXAS INSTRUMENTS INCORPORATED 135OO North Central Expressway

D a IL as, Texas ' USA.

Electric switch

The invention relates to a circuit for opening and closing a circuit dienendeij / electrical switch -with a housing that carries two connections, one of which is stationary Contact? and the other is electrically connected to a movable contact, "whose carrier can be moved from the outside via a device Control slide can be moved from an open position into a closed position is. ·

It is often necessary to operate electrically with the aid of the overtravel of a particular device so that only then an actuation occurs when the device in question is in a certain working position ", such as an open one Device in which an electrical system can only be started up after a certain door has been completely closed may be. A practical example of this requirement is found in washing machines. ·.

909842/1251 ^:

BATH ORIGINAL

in

37 281 h '', / '■ λ,' ./ ί ', /'',.' ■ I

March 27, 1969 - ■ "■■ · j

These machines have a small door through which the textile articles to be washed are introduced. For reasons' For guidance or security, it is imperative that with the door open, even if the control switch, is in its start position is, the machine is not running and not moving, can be set, otherwise the machine j putting the person in action would be dangerous. j

Some international regulations stipulate that the machine can only start when the door of the washing machine is fully open. dig is closed. To meet this requirement-in such machines \, a switch is used, which is mounted on the inside of the washing machine and is controlled by an adjustable shaft, which is fixed to the small door.

During the closing phase the small door generally moves a locking tooth attached to the small door so far with this door until it has exceeded a predetermined limit position, which is defined by the fact that a small, plate attached to the washing machine is run over, behind which the locking tooth suddenly engages with the small plate comes, locking the little door.

The position of the electrical switch must now be set very precisely because the power can only be switched on again via the switch at the moment when the locking tooth passes the small plate attached to the machine and thus locks the small door. If the setting is poorly executed _s, it is possible that the switch is not operated, or that it is switched on prematurely, that is, when the little door their way to full _encryption; close has not quite done yet. In both cases, it is extremely difficult with this system to

'.'. '■ "* 3 ■ ORIGINAL BATHROOM

909842/1251. '.'. ■

37 28i h: · «·. ·«> ·. · ■■ »

27 3 1

March 27, 1969

It is possible to achieve compliance with the regulations, i.e. fcu achieve that the setting is such that the switch IiUI * can then be actuated when the locking tooth the has locked the small door.

The invention is now based on the object of a switch "Create Itu, which, as a result of its contact control, has great tolerance * en when actuated by external means. This task is in the aforementioned switch according to the invention solved in that the control member designed as a control slide from shifting positions, namely from an initial position to an end position can be longitudinally pushed back and forth and la housing between working positions, namely a first locking position and a second release position can be moved back and forth 1st, so that in the starting position the control slide is in the release position is and keeps the contacts in the open position that when moving from the initial position to the end position The control slide is in the locked position and the contacts are in the open position keeps that at the beginning of the backward movement of the control rod Dissolving division assumes and the contacts in the closing division be moved that during part of the backward movement of the control slide era the contacts remain in the closed position, and that on the remaining part of the backward movement the contacts are in the open position. In particular, it »case of a washing machine makes no difference whether the switch is direct or operated indirectly through the small door of a washing machine and only closes itself and the circuit when the locking system of the small door is already engaged, which means Settings for closing the switch in the desired position are avoided.

According to the present invention, it is the opening and closing a circuit controlling switch in detail thereby

909842 / 12S1

37 28i η :: · ■ '■. ; '

27.3. 1969

h - 133 - Jf - '■

characterizes that the closing operation is carried out during the phase in which an operating lever is moving backwards performs. The switch has the following features: a housing in which a movable contact element is provided, which can be moved back and forth on a carrier connected to a terminal; a sliding link that works with a Pressure member is equipped to exert a pressure on the movable contact element, wherein the displacement member'eine can assume first and second positions corresponding to the forward and backward movement, respectively; the shift member is ^ so trained it in its first position which it occupies in its rest position, the movable contact element in the open position pushes, and in its second position during the forward movement the movable contact element, in the open position State holds. The arrangement is such that at the beginning of the reverse movement, the aforementioned sliding member assumes the first position again and the movable contact element closes of the electrical circuit is actuated and holds it in this position for a certain distance during the return movement, wherein the movable contact element in its initial open position by the pressure member according to the end phase of Backward movement of the sliding member is returned.

Further advantages and features of the invention emerge from the following description in conjunction with the drawing, which contains exemplary embodiments of the invention. In the Drawing show:,

Fig. 1 is a section along line 1-1 of Fig. 2 through a switch according to the invention with the panels in initial position;

■; ■. ■; - 5 - ■.: ■ '■. "■.

• "■> ■. BAD ORlGfMAL

90984 2/1251

37 281 h ^l ■ '■ ·

March 27, 1969

Pig. 2 shows a section along line 2-2 of Pig. I without Cover after a little way of the control slide

Figures 3, 4, 5

Sections according to FIG. 1 with the control member in the intermediate position and end position before closing of contacts; -

Fig. 6, 7

Longitudinal sections corresponding to FIGS. 1 and 2 with the Contacts in the initial closed position;

8 shows a longitudinal section according to FIG. 7 after a partial Return movement with the contacts * in the closed position;

Figures 9, 10

partially sectioned end and side views to explain the attachment of the switch to a Washing machine.

With a housing 2 is referred to, to which a connector 1 is attached, which is designed as a plug member in the present example. The transmission could also take place within the housing by screwing or welding. Where k is a contact lever 'designates an arm dessen- a movable contact 5 is formed. To guide the pivotable lever and as a bearing, a bearing piece 3 is used, the projections 8 and 9 of which engage in grooves β and 7 of the contact lever.

Another connector 10 is also as a plug member formed and carries a stationary contact 11 within the housing 2.

909842/1251

BATH

March 27, 1969 ^? '

^h ~ ^m a, "* ί 916564

The movable contact 5 is in its open position by a small pressure member 12 and a spring 13 held. This latter is housed in a recess l4 of a control slide 15, which is pressed by the spring against a wall 16 of the housing 2.

The control slide 15 protrudes through a slot 33 in the housing 2 with a StBuararm 32 and is used to control the switch.

In Fig. 1 there is the control slide 15 with its partial side walls 17 and 18 between inner surfaces 19 and 20 of the lid and the housing. . '

An extension piece 21 (Fig. 2) is arranged on the side wall 17, protrudes from the single tooth 22, which in Fig.l from the longitudinal edge 23 of the movable contact 5 is directed away.

An elastic Ge against spring 'pushes an end wall 25 of the control slide 15 against an end wall 26 of the housing 2.

A recess 27, 28, 29 is to facilitate the sole function of _s, the fabrication of the spool by punching. . -

If an actuator, for example a lock tooth of a washing machine, the controller in the direction of arrow of FIG. 1 exerts, so the spool 15 of the pressure member 12 rotates about the center until the component side surfaces J> G and 31 of the spool 15 against the Inner surfaces 19 and 20 of the cover and the housing are in contact (see FIG. 3). In this position the movable contact 5 has not yet performed any movement while the fan 22 has turned towards the contact 5 so that it is now between the latter and the stationary contact 11.

909842/1251

37 281 h ^: '.

March 27, 1969

When moving the control arm 32 in the slot 33 of the housing, the pressure member 12 tries, if it is past the bearing piece 3, to pivot the movable contact 5 towards the stationary contact 11, but this movement is prevented by the ring 22, as indicated in Figures 4 and 5 »

.If the actuating member is only a little backward after the control movement has been carried out, as in the case of the actuating tooth of a washing machine, which - once the position of engagement has been reached - moves like a snap, does the counter-f ede press? 2k the control slide 15 from the position according to FIG. 5 into the position according to FIG. 6 and then into the position according to FIG. 7. ·. ■

During the movement from the position according to FIG. 5 to the position according to FIG. 6 "" derrzänn 22 releases the movable contact 5, "so that it touches the stationary contact 11. During the movement from the position according to FIG. 6 into the In the position according to FIG. 7, the control slide 15 strikes against the actuating element, as a result of which the contacts 5 » H remain closed.

When the actuator of the machine is returned, so much to release the door, the device moves into position according to FIG. 8 and then into the position according to FIGS. 1 and 2.

A practical application example is shown in Figures 9, 10, in which the switching device according to the invention cooperates with a device for closing a washing machine, '"--.- ■." "·

In this case, the above-mentioned effect of the locking tooth of the washing machine is transmitted to the control / "^ via an actuator 3Ί.

- 8 909842/1251

BATH ORIGINAL

11 * *
Λ * t

1ί I I t

37 281 h

27. 3. 1969 each

With the switch described above, expensive adjustments to the position of the control slide can be avoided insofar as the voltage can only be switched on again when the actuator has returned and _: only after the locking tooth has snapped into its position to lock the door.

BATH ORIGINAL

909842/12 51

Claims (1)

281 h '' March 27, 1969 h - 133 ■. _o - ₉ -1916564 Claims I.) Electrical switch used to open and close a circuit with a housing that carries two terminals, one with a stationary contact and the other is electrically connected to a movable contact, the carrier of which via an externally movable control member from a Open position can be moved into a closed position, characterized in that it acts as a control slide (-15) trained control element from shift positions, namely from an initial position to an end position can be pushed back and forth longitudinally and in the housing (2) between working positions, namely a first locking position and a second release position, can be moved back and forth so that in the initial position the control slide (15) is in the release position is and the contacts (5, H) holds in the open position that when moving from the initial position to the end position the control slide (15) is in the locked position and the contacts (5, 11) holds in the open position that at the beginning of the backward movement the control slide (15) is in the release position and the contacts (5, 11) are moved into the closed position, that during part of the backward movement of the control slide (15) the contacts (5, H) remain in the closed position, and that.on the remainder of the backward movement, the contacts (5, 11) take the open position. 2. Switch according to claim 1, characterized that the movable contact (5) forms part of a contact lever (4) around a central bearing (3) pivotable between the outer positions of the control slide (15) is. *. - 10 - 909842/1251 281 h "'...... • 27. 3rd 1969 h - 133 · _1o .- «M'91-6-5 6 4". 3. Switch according to claim 1 or 2, characterized ge k en η ■ / draws that there? Control spool? (15) can be pivoted back and forth transversely to the pivoting movement of the movable contact (5) between the two working positions. Ί. Switch according to one of the preceding claims, there- ' d u r c -h characterized in that the working positions are limited by stops (19, 20). 5. Switch according to claim * {, characterized in that the stops are the walls (19 _S 20) of the housing (2). 6. Switch according to one of the preceding claims, characterized in that-the control slide (15) in plan view has a prismatic shape with two pairs of stop surfaces (17, 18; 30, 31). 7. Switch according to one of the preceding claims, characterized in that a lower the action of a contact spring (13) standing pressure member (12) is provided, which on the movable contact (5) acts and is arranged on the control slide (15). 8. Switch according to one of the preceding claims, characterized in that the control slide (15) is provided with a locking tooth (22) which the movable contact (5) during certain phases of movement of the control slide (15) holds in the open position. 9. Switch according to claim 8, characterized in that g.e k e η η ", that the locking tooth (22) is attached to an extension piece (21) of the control slide (15), • -11. 909842/1251 BATH ORIGINAL 281 h ^rr ''.' March 27, 1969. -! niece / e - 133 _{1 <f} - 191 656 A which is since borrowed from the contact lever (Λ) . 10. Switch according to one of the preceding claims, d a - • characterized in that the control slide · (15) has a control arm (32) which is transverse to the direction of the line of action of the pressure member (12). 11. Switch according to one of the preceding claims, characterized in that the contact lever (Ό is guided in its pivoting movement. 12. Switch according to one of the preceding claims, characterized in that the contact lever ( ¹ I) is attached with its end to a stationary part, for example to a connection (1), while its other end forms the movable contact (5). 13 · switch according to one of the preceding claims, characterized in that the contact lever is a double lever ⁽¹ O is, the bearing (3) arranged between the lever arms, wherein the length of the lever arms according to the closed or open position of the contacts during the backward movement is provided for. Ik. Switch according to one of Claims 7 to 13, characterized in that the control slide (15) receives the contact spring (13) and the pressure member (12) in or on itself. 15. Switch according to one of the preceding claims, characterized in that a counterfeed - 12 - 90 9842/1251 BATH ORIGINAL «Tti · t 1 *** 281 h "* March 27, 1969 in 1CCC / h - 133 ι _Λ -ig 4 ° I 656 A the (2 ¹ I) is provided, which tries to move the control slide (15) from a locking position into the release position and into the initial position. ■ 16. Switch according to one of the preceding claims, characterized marked *,. that the switch cooperates with a mechanical lock, on the switch acts via an actuator, the first of which Return movement takes place upon completion of the mechanical locking. Fe 17. Switch according to claim 16, characterized in that the return movement corresponds to a The circuit is closed when the lock is in its locking position. 18 «switch according to claim 16 or 17, characterized that the closed position of the switch during a predetermined return travel of the actuator is maintained until a certain intermediate position. . 19. Switch according to one of claims l6 to l8, characterized characterized in that the lock cooperates with ψ a device for closing a small door of a washing machine. . 9098A2> 1251 Leersej.t