CN2181738Y - Switch - Google Patents

Abstract

The utility model relates to a miniature switch which is provided with a cylindrical flexible thin film. At least one end of the flexible thin film is inserted with a positioning member. Two movable reeds are extended at an interval in the space which is covered by the flexible thin film, and the movable reeds are provided with contact points on corresponding position. The utility model is also provided with two terminal members; one end of each terminal member is connected with a movable reed, and the other end of each terminal member is extended outward; the two terminal members are provided with positioning members which are fixed on the connecting position and/or other position. The terminals of the miniature switch is not easy to deform even when the required starting force is tiny. The utility model can prevent the movable part from deformation and sundries attachment.

Description

Switch

The utility model relates to the electric switch that is used for electric equipment, relates in particular to switchette.

In the electric equipment, use all switches, especially in the control of equipment, use microswitch and sensing switch according to purposes.These switches open and close circuit by mechanical action or temperature, the pressure etc. of detection equipment, thereby equipment is controlled.Therefore, generally speaking, be subjected to the restriction of assembling space and require the switch miniaturization, also have, require its cost low or the like more because of using number because of detected object needs faint its starting power that requires of active force little sometimes.As one of this switch, used reed switch originally.This switch is an end points of the reed of the phosphor bronze that is shaped at the punch press stamping-out contact of burn-oning, then with two of this reeds in parallel to each other with resin system switch body portion formation one.One end point of reed is stretched out body portion head in opposite directions, forms the moving spring of switch portion, and it is shorter that the other end oppositely stretches out body portion, constitutes lead terminal.Be provided with in this body portion again and twist the installing hole that screw is used.By masterpiece being used for the contact is opened and closed.

, above-mentioned reed switch, its lead terminal and moving spring are integrated, and form tabular.Like this, when requiring starting power small, the thickness of material will be obtained thin, by using easy deformation, and when being used on the printed panel, also exist material to cause problems such as the soldering performance is undesirable.Because the moving spring of switch exposes, exist distortion in process of production or because of attaching the problems such as worry of metallic foreign body (grit, thin bits cut powder etc.) short circuit again.

The utility model proposes in view of the problems referred to above of prior art, and its purpose is, even provide a kind of also not yielding when requiring starting power small, and can prevent the movable part distortion, adheres to the switchette of foreign material etc.

The utility model that is used to solve above-mentioned problem is a kind of like this switch, and it has: the flexible thin film of tubular; At least one end intercalation this flexible thin film has align member; In the space that above-mentioned flexible thin film covers, extend with predetermined space, but and on opposite position, be provided with two movable contact springs of contact; But an end engages with described movable contact spring, and the other end stretches out to the outside, but and is fixed in two terminal components on the align member with the bonding part of movable contact spring and/or other parts.

Again, this switch can make like this, and it has: form framework and pasting flexible thin film's align member at its end face and bottom surface; In the inner space that forms of this align member, extend in opposite directions with predetermined space, but and on corresponding position, be provided with two movable contact springs of contact; But an end engages with described movable contact spring, and the other end stretches out to the outside, but and is fixed in two terminal components on the align member with the bonding part of movable contact spring and/or other parts.

But the related switch of the utility model since its terminal component constitute separately with movable contact spring, so can only suitably select according to desired starting power, but the material of conversion movable contact spring and thickness (elastic strength), thereby guaranteeing that terminal component has prevents to be out of shape required intensity and soldering performance.In addition, movable part covers with the flexible thin film, but does not have the sorrow that movable contact spring is out of shape and attaches foreign material.

Embodiment of the present utility model is described with reference to the accompanying drawings.

Fig. 1 is the longitudinal section of first embodiment of switch of the present utility model;

Fig. 2 is the A-A place cutaway view of Fig. 1;

Fig. 3 is the longitudinal section of second embodiment;

Fig. 4 is the C-C place cutaway view of Fig. 3;

Fig. 5 is the longitudinal section of the 3rd embodiment;

Fig. 6 is the D-D place cutaway view of Fig. 5;

Fig. 7 is the longitudinal section of the 4th embodiment;

Fig. 8 is the B-B place cutaway view of Fig. 7;

And in Fig. 3 to Fig. 8, there is the part of identical function to be marked with prosign with Fig. 1 and omits its explanation.

Embodiment when align member in the two ends intercalation that Fig. 1 and Fig. 2 are illustrated in the flexible thin film.In Fig. 1, switch 1 is at flexible thin film's 2 cylindraceous two ends intercalation align member 3a and 3b, the both sides in the space 7 that forms in inside, one end stretches out and two-terminal member 4a and 5a that the other end extends in opposite directions are fixed on align member 3a and the 3b to the outside, but the end of these two terminal component 4a, 5a engages (4d, 5d) with two movable contact springs that extend with predetermined space and be provided with contact 6a, 6b on its opposite position 4c, 5c respectively again in space 7.

In Fig. 1 and Fig. 2, but movable contact spring 4b and 5b with usually as the phosphor bronze of spring as material, and by to be die-cut into thickness be the sheet material about 0.1～0.2mm or be cut into bar shaped and make.Its thickness, length, width etc. should be selected according to purposes and desired starting power etc.Terminal component 4a and 5a are by directly being that plating about 0.4～0.5mm is cut into predetermined length with the hard copper wire of base metals such as tin, soft solder and is made with line.By improved corrosion resistance and soldering performance with the coating line, can prevent distortion by using hard copper wire to improve intensity.And, improve intensity by making round line, insert printed circuit simultaneously easily.Speech need not be put, also tabular, horn shape can be made.But at the leading section (4c, 5c) of above-mentioned movable contact spring 4b and 5b, the contact 6a and the 6b that constitute by noble metals such as gold or silver of spot welding respectively, this contact 6a and 6b report to the leadship after accomplishing a task overlapping, are arranged in the orthogonal direction.But movable contact spring 4b and 5b engage with spot welding respectively with the end of terminal component 4a and 5a.Therefore, but like this movable contact spring 4b of Jie Heing and 5b and terminal component 4a and 5a or with predetermined shape and align member 3a and 3b formation one or with the reservation shape that cooperates with terminal component 4a and 5a align member 3a and 3b are formed separately after, form one again with two member 4a and 5a, 3a and 3b assembling, and with the thermosetting adhering with epoxy resin.Align member 3a and 3b, usually be polyacetals shaping resins such as (ジ ユ ラ コ Application) with polymerization, but also can flexible thin film 2 be concentrated with the stress of the connecting portion 2a of align member 3a and 3b be eased, thereby prolong this flexible thin film's 2 life-span by with rubber or limber resin.Then, but align member 3a and 3b arrive flexible thin film 2 two ends with movable contact spring 4b and 5b intercalation inwardly, use the material adhesive of adhering with this flexible thin film 2, or weld formation switch 1 by heating.Flexible thin film 2 material available thickness is nylon tube or the rubber tube about 0.2～0.3mm.And flexible thin film 2 section configuration also can make flat ellipse when switch 1 requires thin type.

Above-mentioned switch 1, pushing central portion by flexible thin film 2 can closing contact 6a and 6b.When switch 1 is used on the printed circuit board (PCB),,, again the printed panel welding is directly inserted in their crooked backs so can in advance terminal be done length because two-terminal 4a and 5a stretch out round about from body portion.At this moment, because the welding of the two ends of switch 1, thereby fixing very firm, body portion needn't twist with screw and connect or adhere with sticker.That is, can install such as assembly parts such as resistance, there is no need to resemble and with screw switch body portion is installed on the substrate the existing reed switch, with lead terminal is connected on the printed circuit board (PCB) again as other.

Fig. 3 and Fig. 4 represent the align member in the switch illustrated in figures 1 and 2 is inserted the embodiment of flexible thin film's one end.Difference with Fig. 1 and Fig. 2 in Fig. 3 and Fig. 4 is, align member 23 only inserts an end of tubular flexible thin film 2, and but two movable contact spring 24b, 25b are fixed on this align member 23 by terminal component 24a, 25a are equidirectional, like this, can shorten the total length of switch 21, save the installing space on the substrate.Again, as long as an align member 23 can reduce number of components.Have, will be installed on the substrate after the bending of terminal part, make switch 21 along continuous straight runs actions, switch 21 left-right symmetric then are no matter which direction is pushed and can both be moved from the left and right sides.

As mentioned above, switch of the present utility model can in the opposite direction or be provided with the reed member on the equidirectional.

Fig. 5 and Fig. 6 represent the terminal component of the switch of Fig. 3 and Fig. 4 is stretched out the embodiment that direction makes right angle orientation.In Fig. 5 and Fig. 6, be with the difference of Fig. 3 and Fig. 4, but use junction surface 34d, the 35d of right angle orientation to replace movable contact spring 24b, 25b and the unidirectional joint portion 24d of terminal component 24a, 25a, 25d among Fig. 3 and Fig. 4.Like this, as long as terminal is just intactly inserted on the substrate and can level be installed by switch 31, thereby can save operation with the hand jogged terminal end.As shown in the figure, junction surface 34d, 35d are fixed in the epoxy resin that part 33a, 33b in the align member 33 uses the above-mentioned thermmohardening of using as adhesives again.

That is, form align member under the state that partly keeps vacating at this 33a, 33b, but behind assembling terminal component 34a, 35a and movable contact spring 34b, the 35b, in 33a, 33b, inject thermmohardening epoxidation resin again; And heat hardening.Like this, fix by junction surface 34d, 35d are imbedded in the align member 33, can obtain junction surface 34d, 35d does not need the high benefit of bond strength.Again, the direction of action when being installed to the switch among the figure 31 on the plated circuit is a horizontal direction, this moment since left-right symmetric no matter from the left and right sides which direction push and can both make its action.Terminal component 34a, 35a are stretched out direction make consistently with the direction of action of switch 31, the direction of action in the time of just being installed in switch 31 on the printed panel is set at above-below direction.

The align member of the switch of Fig. 7 and Fig. 8 presentation graphs 1 and Fig. 2 is made the embodiment of another kind of shape.In Fig. 7 and Fig. 8, be that with the difference of Fig. 1 and Fig. 2 align member 13 is a frame-like, the top of this frame-like align member 13 and bottom be with sticky material adhere respectively flexible thin film 12a and 12b, or form switch 11 by heat welded.Like this, can increase the intensity of switch 11, and switch 11 can be done very thinly.

Switch of the present utility model as mentioned above, but owing to have two movable contact springs that in by align member and the film formed space of flexible thin, extend and in opposite position, be provided with the contact with predetermined space, and but an end engages with described movable contact spring and the other end stretches out and be fixed in two terminal components in the align member to the outside, but so except that can selecting the elastic strength etc. of movable contact spring, can guarantee also that terminal component has to prevent to be out of shape required intensity and soldering performance etc. according to starting power.Again, because of movable part covers with the flexible thin film, so but the worry of not having the movable contact spring distortion and adhering to foreign material.Therefore, can improve the reliability of machine.

Claims (2)

1, a kind of switch is characterized in that, it has: the tubular flexible thin film; In at least one end of this flexible thin film, inserting align member: but in the space that above-mentioned flexible thin film covered, extend and on corresponding position, be provided with two movable contact springs of contact with predetermined space; The other end stretches out and above-mentioned bonding part and/or bonding part two terminal components of partial fixing on align member in addition to the outside but an end engages with described movable contact spring.

2, a kind of switch is characterized in that, it has: constitute framework and pasting flexible thin film's align member at its end face and bottom surface; But in the inner space that forms of described align member, extend and on corresponding position, be provided with two movable contact springs of contact in opposite directions with predetermined space; The other end stretches out and above-mentioned bonding part and/or two terminal parts of partial fixing on described align member in addition, bonding part to the outside but an end engages with described movable contact spring.

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