DE1615773A1 - Snap switch - Google Patents

Description

ÜS Ser.No. 567.633. :;

of July 25, 1966: ■ '■■■■

Lyndon Walkup BurCh, Boston, Massachusetts, USA

Sehnapps switch ■

The invention relates to electrical holders of those Species that have a so-called snap action.

A difficulty with such snap switches is that it is impossible to achieve a satisfactory one with these switches To effect current control when the tendon or the contacts in the company do not work in the desired way should. This is especially true when the components of the Snap switch consist of thin metal strips or sheet metal. The sheet metal used in snap switches is usually a beryllium-copper alloy, which is rarely over 2.6 x. 10 cm (0.0001 inch) ". Such a material will quickly annealed if overheated by an overcurrent and can even be vaporized at very high overcurrents ·.

Another disadvantage of snap switches is their Sensitivity to shocks and sudden accelerations of the switch, which both have the desired effect

affect the switch. When the tremors proceed with the resonance frequency of the snap element, the interference effect can be considerably increased will.

It is therefore an object of the invention to provide a snap action ensure, which greatly reduces the possibility of damage to the snap element by overcurrents and it is also an object of the invention to provide a snap-action switch indicate that can still work satisfactorily if the snap link should be destroyed or if its ability to conduct electricity and its snap-in properties should be impaired. "

Another object of the invention is to provide a snap switch indicate its ability to produce the desired contact in the event of vibrations and under the influence of acceleration forces not be disturbed.

In addition, the invention has the purpose of specifying a snap switch which is larger without increasing its dimensions Can lead currents.

Finally, the invention has the purpose of improving it to ensure the Sehnappffekt with regard to the above-mentioned aspects, without a larger number of components than having to be provided in ordinary or known snap switches. The manufacturing costs are also reduced with a snap

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switch according to the invention little or not at all '' ... turn out higher,: j:

According to the invention, a snap member with an on first contact attached to it is provided and a second contact is also provided within the relevant snap-action switch provided, the first and the second contact with each other " get in touch. The 3chna ^ p member and at least one part the arrangement carrying the second contact are arranged in such a way that that vain relative movement of the two contacts can take place. This relative movement is used to actuate the snap member Used * The snap movement takes place at a significant angle to the plane of the relative movement * /

At least some excessive movement beyond the point at which the snap action is provided is provided entry. According to the invention is also an auxiliary member in the Path of excessive movement provided. Here is the arrangement taken so that a mating contact surface is assigned to the snap member. These cooperating parts are like that constructed and arranged that the power conduction path through the switch during at least part of the above mentioned overclassing movement is modified.

A feature of the invention is that the cooperating Parts of the snap switch form a shunt path via the auxiliary link. This shunt path is used to which flows through the main contacts after the snap action

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to take over. In those cases where the current is over the main body of a snap element flows, there is a feature of the invention in that this shunt path is arranged so that the full current through the base body of the snap element only flows during the switching time. Another feature of the invention is that the support body for the Snap element can form the mating contact surface, which of the auxiliary link is touched after the excessive movement has elapsed to form the shunt path. A feature of the invention also consists in the fact that the auxiliary member simultaneously acts as a stop to limit a further overshooting movement serves. A bias of the carrier body against the stop ensures the shunt path.

Another feature of the invention is that the attachment of the snap member is electrically conductive. This means, that the attachment point with the common clamp of the switch is conductively connected «. It will either be the mounting pad or the mating contact of the snap member; located contact designed to be movable to operate the snap switch. An approach to either the attachment point or said contact is used to touch the other contact so that both a stop and a shunt path is formed.

According to the invention, the contact pressure is also through elastic deformation reinforced. The size of the

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increased running area between the two contact halves and accordingly also increases the current load on the contacts. For this purpose, the auxiliary link can be a wedge-like one Effect so that the snap contact during, the overshooting Movement is deflected and pressed against the mating contact. If it is a double pole switch and an actuator is located between the contacts, the moving contact from the fixed contact to separate and bring into contact with the opposite contact, the wedge-shaped effect can exert Part of being physically connected to the actuator so that during the excessive movement, the wedge-like part touches the moving contact and makes it more firmly attached to the stationary Contact presses. A similar feature is the use of an isolated and wedge-shaped one Approach of the first established contact.

Those characteristics that make the shunt and may affect the exercise of a kei! effect can be combined with each other, so that in the. by the wedge effect caused movement of the movable contact on the part of the auxiliary member, this same auxiliary member or a Second auxiliary link accomplished the bypass path.

Another feature of the invention is as an actuator to use an insulating part to separate the contacts, which allows the contacts to open slowly

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made as desired for certain AC problems 1st.

Another feature of the invention is the creation of a pivot mounting of the movable part, namely the Carrier body for the contact tongue. In this way, a gain and also the desired movement is achieved, wherein the stops limit the rotational movement, so that the shunt path is defined.

Pig. 1 is a perspective view of an embodiment of the switch according to the invention, in which the Sehalter housing is shown partially broken away.

Figure 2 is a rare view of the Pig switch.

Fig. 3 shows a section along the cutting plane 3-3 in Fig. 2.

Fig. 4 is a section through a second embodiment, wherein the switch contacts are in the first switch position are located. ■

Fig. 5 differs from Fig. 4 in that the Switch contacts are in the second switch position.

Fig. 6 is a perspective view of the actuator for the second embodiment (Figs. 4 and 5).

7 shows a section through a third embodiment, the switch contacts in the first switch position are located.

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FIG. 8 differs from FIG. 7 in that the Sehalter contacts are in the second switch position

Pig «. Fig. 9 is a perspective view of an actuator for the third embodiment (Figs. 7 and 8).

In the following description of the invention, a so-called M-shaped part according to the USA patent code 3,213,228 used, to which also for details the attachment etc. should be referred to,

Fig. 1 shows a switch with two switch positions and a housing 12 made of insulating material.

A support strip made of a conductive material, for example made of copper or aluminum, is attached to the housing. An axis 26, which is hinged to the support strip 16, carries a rotatable support body 30 * which in FIG. 1 through a slot 36 of the housing protrudes and serves as an operating lever.

A spring 38, between a shoulder pin of the support body J5Q- and the support strip 16 provides a tilting force for the support body 30, which holds this support in two stable positions on both sides of a vertical line L.

A metal button 44 is attached to the lower end of the bracket 30 and has a circumferential groove into which adjacent edges of the inner arms 50 of the designated as a whole with 52 (The M-shaped snap element shown in Fig. 1 can also be replaced by another similar component be replaced.) _

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The current path to be closed via the switch runs from a common terminal 11 (FIG. 2) via the bar 16, the axis 26, the carrier 3®, the metal button 44 to the inner arms 50, a contact 60 on the front of the snap element 52 to a contact 64 located on the rear side of this snap element.

According to FIG. J there is a rib 76 in the housing 12 in a vertical plane through the axis 26 and on both sides of this rib 76 a contact 72 or 74 is provided, which can come into contact with the contact 60 and with the terminals. 9 or 10 is connected by the rotary movement of the carrier JO .

Contact 60 slips on contacts 72 and 74 in a direction which is parallel to the plane of the snap element 52 to correspond to that in U.S. Patent 3,899 described principle a fusion beginning at the contact point to interrupt. When the carrier j50 is near the Rib 76 comes, for example in the direction of arrow A. in Fig. J5 the rib 76 directs the snap element into the other stable operating situation,

In the Pig. 1 to 3 is on the bar 16. A conductive plate 20 (Fig. 3) attached to its middle Part two sloping arms 23 and 25 adjoin the contacts 72 and 74 are opposite. After the contact the mating contact 74 under the influence of the inclined part 74 'of this mating contact 74 leaves and with further movement in the direction of the

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Arrow A is guided by the inclined arm 2; 5 and the contact the snap element comes into contact with the mating contact 72.

According to Pig * 3, the production and the interruption take place of the contact in the area C, while for the contact an excessive contact path is provided at T, so that a suitable contact pressure is ensured without the leaf-shaped and bending part of the snap ring 52 to claim.

The movement over the distance T is caused by stops 77 and 78 (Fig. 1) limited; to which the metal button 44 strikes. These stops are conductively connected to contacts 72 and 74. Also, as in Pig. 1 shown this Stops 77 and 78 formed integrally with parts 72a and -74b, which in turn are related to the mating contacts '72 and 74 (Pig. 3).

So if the carrier. 30 is turned over until it touches one of the stops 77 or 78 under the force of the peder 38, a current path is formed from the carrier 30 via the metal button 44, the stop 77 ^to a terminal 9 (Pig. 1), so that a Shunt path to the snap element 52 is formed. This not only relieves the snap element of an overcurrent in the closed "state" of the snap switch, but also achieves a safety effect.

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In Fig. 3, the contact 64 jumps as soon as it moves in the direction of the arrow A, the vertical center line L of FIG. 3 is exceeded has from the inclined arm 25 and touches the mating contact 72nd. ■

In the area T, however, the arm 25 presses the contact again 74. So if the contact 74 is to the left of the line C on the left half of the figure;> the so-called overshooting Passes through the contact path, the contact 64 comes with the oblique Arm 25 again in contact so that contacts 60 and 72 are fixed are pressed on each other and a bypass path for the flow of the bar l6, with which the inclined arm 25 is connected is to form.

The switch is thus insensitive to vibrations made and reduces the electrical stress on the contact 60.

A resilient design of the inclined arm 25 thus makes it possible to utilize the excess contact path in order to complete the shunt path via the stop 77.

An embodiment based on the push-pull principle is shown in FIGS. An actuating lever 90 is made of insulating material and is displaceable within a housing 92, which is also made of insulating material. A > snap element 96 corresponds to element 52 in FIG. 1 and is attached to a holder 98 by means of a link 100 which

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in turn sprouts from the metal button 44. in Fig. 1 ;. One contact 102 touches a mating contact 106 which is fastened to the housing 92 and a contact 104 a mating contact 108 ,, der = is also attached to this housing> (Fig. 4 and 5.) »The leads to the contacts 106, 108 as well as 102 and 104 are guided through suitable openings in the housing.

The snap element 96 is supported by lugs 116 and II8 of the ' Operating lever: 90 controlled when this in the interior 94 of the housing 92 pushed in or pulled out of it will. The approach II6 in Fig * 6 has an opening 120 and is on that side of its Quertöils, the dew actuating body 90 facing is provided with a conductive insert 122. Of the Approach 118 is slightly shorter than approach II6 and has a metallic insert 124,

When the actuating body is 9 ° in Fig. 4. to the right moved and if you still touch the contacts 102 and 106, so is through the insert 122; the contact 102 from its mating contact 106 lifted, the first being the sliding connection between the contacts 102 and 106 is still maintained via the insert 102. During this movement the snap element 96 controlled over its central position and then reaches the position shown in Fig. 5. The overshooting movement of the actuating body 90 then has the consequence. that the insulating surface; on the underside of the cover part II6 your Contact 104 is pressed against the opposing contact 103. The glides

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Contact 104 from the conductive insert 124 so that it is with the Mating contact 108 can come into contact. When the operating body 90 is reversed to the direction of the arrow in Fig. 4, i.e. in Fig. is moved to the left, the contact 104 is removed from the mating contact 108 separated. The snap element 96 is thus over its central position controlled away and assumes the position shown in Fig. 4, in which the contact 102 its mating contact IO6 within of opening 120 touches. The excessive movement of the Actuating body 90 then has the consequence that the upper side 117 of the arm IIS presses the contact 102 against its mating contact IO6 .

The separation of the contacts 102 and 104 from the mating contacts 106 and 108 is slow compared to the separation of the contacts 102 and 104 from the inserts 122 and 124 which is caused by the snap element 96 . For use with alternating current, the inserts 122 and 124 are advantageously omitted and replaced by insulating material, as is shown in FIG. A slow opening of the contacts is advantageous in the case of alternating current because an arc burning between the contacts is extinguished in any case at the zero crossing. In this embodiment, a slow interruption and a quick closure of the contacts is achieved.

As described further above, a quick separation of the contacts by the conductive inserts 122 is required for direct current and 124 accomplished.

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In the third embodiment illustrated in Figs are two resilient metallic arms · 132 and 134 on attached to an actuating body 136 made of insulating material, each of these arms being U-shaped, i. has an inner opening I38. Two actuating cams 144 and 152 are attached to the inside of the insulating housing. When the actuating body in FIG. 8 moves in the direction of the arrow is, the bridge leg 142 of the arm occurs "· -"; 132 "between the Contacts 102 and 106 a so that the snap member jumps over and the contact 1Ö4 touches its mating contact 108. The override causes the bridge leg l42 to be pressed down by the cams 152 until this bridge leg moves away from the Counter contact IO6 releases and contacts 104 and TO8 with each other come into contact. With the reverse movement of the actuating body the bridge leg ISO is actuated by means of the cam 152.

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Claims (1)

Claims 1.) Snap switch with a snap link, also with a "'" first contact and one associated with this first contact Counter-contact, wherein the snap member and at least a part of the counter-contact unit can be moved relative to one another in this way are arranged that the tendon member is actuated, and that the snap movement proceeds at an appreciable angle to the direction of the relative movement, thereby marked, that the snap link can move beyond the relative movement, that the contact and the counter-contact touch each other also during this crossing, that an auxiliary member is provided in this crossing, that an actuating surface cooperates with the snap member in such a way that the auxiliary member during the passage through the crossing is controlled and that the auxiliary member and the actuating surface according to their mutual Touch to change the current flow through the snap switch. 2.) Snap switch according to claim 1, characterized in that . ' that the snap link is attached to a conductive support, 0 0 9 8 2 8/061 7 that-the snap member and the carrier with a first-clamp connected sirid ,, that the current to the first contact runs through the tendon phalanx, ■ · that an operating surface is attached to the carrier, that the auxiliary member is conductive and electrical is connected to the mating contact, so that upon contact of the actuating surface with the snap member a shunt path is formed, which over the Snap switch reduces current flowing. 3.) Snap switch according to claim 1 or 2, d a you r c h g e Ie en η ζ e i c h η e t that the auxiliary link has a stop has, which is arranged so that no major crossing can be traversed «. 4.) Snap switch according to claim / 5, since d u r c h g e k e η η ζ e i c h η e t that an auxiliary spring is provided, which, usually the snap link, presses against the stop. 5.) Snap switch according to claim 1, d ad ure h g e * · denote that the auxiliary member is the first contact touches and presses it against the second contact, so that a larger current can flow through these two contacts. 6 «) Snap switch according to claim 1 or 5 * d a du rc h ge · k e η η ζ e i without t that the auxiliary link together with the second contact forms two surfaces facing in the direction of the 0098 28/0617 " ■ * · 16 - Converge over the first contact and increase the contact pressure. ... 7.) Snap switch according to claim 6, characterized in that at least one of the two KontaktberührungsfLachen is resilient. 8.) Snap switch according to claim 1 or 5> da d -u r c h characterized in that the snap member on a fixed base is attached that the arrangement has a movable Includes actuating body which is capable of actuating the snap member, that the arrangement is further formed is that the first contact is controlled beyond its central position is so that the first contact strikes the second contact and that during the passage of the over travel of the actuating member, the first contact is pressed forcefully onto the second contact will. 9.) Snap switch according to claim 1, characterized in that the snap member together with the first contact is mounted on a rotatable support, that the second contact, which in turn cooperates with the first contact, is firmly attached, that both contacts during the rotational movement of the carrier mentioned on each other slide and a control effect through a control cam is exercised on the snap member that a stop is provided which limits the rotational movement of the carrier and that the Stop is connected to the fixed contact, so that to the 009826/0617 1015773 Snap contact a bypass path is formed, ¹ when the carrier is pressed onto the stop, 10.) Snap switch according to one of the preceding claims, characterized ge ke χι η ζ e 1 ch η et ^! ; That the snap member is 'sheet-shaped' and that the relative movement is at least approximately parallel to the plane of the leaf-shaped snap member. - "; 11.) Snap switch according to one of the preceding claims, ge k e "'n, -" n. ζ ei c h η e t d u r c h a first electrical Contact, the force transmitted through this contact can be actuated by means of fastening .der leaf-like snap spring in a neutral position in such a way that the snap member on both sides of an unstable central position Can each take a stable position by a fixed one second electrical contact, that of the first contact can be touched when the snap link is on one side of the unstable central position, by a stationary one third contact that can be touched by the first contact, when the snap link is on the 'other side of the unstable Central position is located by a to exert a wedge effect suitable part, which the first contact through the labile Middle layer moved through, so that the first contact hits against the third contact and through means, by virtue of those first contact can snap back onto the second contact. 12.) Snap switch according to claim 11, characterized in that the snap back of the first contact on the second contact means provided contain a second wedge-acting part. 15.) Snap switch according to claim 12, characterized in that that one part exerts a wedge effect on the front side and the other has a wedge effect exerting part is on the back of the first contact that the two parts each exerting a wedge effect are arranged that they move towards each other and that these parts have a distance from each other, so that a Space for the first contact to be made Snapping movements is formed. 14.) Snap switch according to claim 11, characterized in that that the part exerting a wedge effect is electrically conductive and the current transfer between the first contact and the second contact can take over until the snap action takes place. 15.) Snap switch according to claim 11, characterized in that that the part exerting the wedge effect consists of electrical insulating material. 16.) Snap switch according to one of Claims 11 to 15 *; characterized in that the wedge-acting part has a rear plank which 009026/0617 presses the first contact firmly against the mating contact after the snapping process has expired. 00982g / Q6 17