JPS6369114A - Switch - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention comprises a first displaceable contact member fixed at least at one end to a support and in the form of a metallic wire, and a second contact member cooperating with the first contact member. and when the first contact member is displaced between the first position and the second position, the first contact member undergoes an elastic deformation determined by the operating force and the resisting force, and the wire guide unit Said resistance force exerted on the contact member relates to a switch that increases with a uniform value during at least partial displacement of the first contact member.

In a switch of the kind described in the preliminaries known from German Patent Specification No. 2.925.653, the first contact member consists of a wire, which wire is wound in a conical helix. , one end of the first contact member is fixed within the support while exerting an operating force on the other end.

In embodiments having both an opening (break) contact and a closing (meter) contact of the electrical circuit, the second contact member forming the opening contact is wire-shaped. The straight part of the first contact element that engages with the support serves as a so-called wire guide, which guide resists the pivoting of the first contact element during actuation of the switch. The resistance increases at a constant value until the moment the switch is turned on. The extent to which the resistive force increases during operation of the switch depends entirely on the diameter of the wire and the shape of the first contact member.

The problem with known switches is that if the same type of switch is required to have different force displacement characteristics in response to customer requests, it is necessary to make relatively significant improvements to the switch manufacturing process. occurs.

For example, it is often necessary to have a force displacement characteristic in which the resistance force initially increases by a uniform value and then decreases by a uniform value.

An object of the present invention is to provide a switch that avoids the above-mentioned problems.

To achieve the object of the present invention, the switch according to the present invention is characterized in that the wire guide portion is a protrusion whose dimensions are set independently of the wire diameter of the first contact member and which is electrically insulated from the second contact member. In particular, the switch is characterized in that the molded part is configured to cooperate with a U-shaped part of the first contact member which is displaceable in two orthogonal directions, in particular to avoid as much as possible the risk of contamination of the contact area. In an embodiment, both the first and second contact members are formed of metal wire, the U-shaped second contact member is fixed to the support at two ends of the second contact member, and the first contact member is The first and second contact members are arranged in a plane perpendicular to the plane in which the bracket-shaped portion of the contact member is disposed, and the first and second contact members
two contact points in one of the first and second positions of the contact member engage each other, while the first contact member engages a wire guide, and the protuberance of the wire guide comprises: during the displacement of said first contact member from a first position on one side of said protuberance to a second position on the other side of said protuberance, first increasing uniformly and then decreasing uniformly; Thereafter, a uniformly increasing resistance force is again applied to the bracket-shaped portion of the first contact member.

Furthermore, in embodiments of the switch in which the force displacement characteristics can be determined to a large extent by torsion of the first contact member, the first contact member is symmetrical and has parallel paired first limbs. The first rim has one end fixed to the support and the other end engaged with a pair of aligned second rims, in a plane perpendicular to a plane containing the paired first rims. The second rim is arranged together with a pairwise coupled third rim, and the parallel pair of third rims are interconnected by a bridging portion, whereby the third rim is connected to the first contact member. It is characterized in that it constitutes a bracket-shaped part.

Furthermore, while also maintaining the torsion of the first contact member,
In an embodiment of the switch in which a predetermined distance can be set between the wire guide and the contact, the bracket-shaped part of the first contact member has two rims that diverge towards the second contact member. It is characterized by having the following.

Embodiments according to the present invention will be described in detail below based on the drawings.

The switch 1 shown in FIGS. 1 and 2 has a housing 3 made of a synthetic material, such as Teflon or glass-filled polycarbonate, by injection molding, and made of a bushing. Button 5 can be displaced in a direction parallel to arrow 7. The bushing button is provided with a ram portion 9 that engages with a wire-shaped first contact member 11, said first contact member 11 being made of metal (for example, a nickel-manganese alloy) and having the shape shown in FIG. . As can be seen in Figure 1.2.5, the first contact member 11 has a pair of vertically parallel rims.

L2, horizontally aligned rims L3+ L4, and a pair of horizontally parallel rims2. And said rim L3+
It has a horizontal rim L, parallel to L4. This rim is 1~L
, is formed from a single round wire by cutting and bending with known processing machines. The horizontal or vertical arrangement of the rims L1 to L1 in the above case is as follows:
It corresponds to the off state of the switch. In Figure 1,
The position of the first contact member 11 corresponding to the on state of the switch 1 is indicated by a broken line. Switch 1 is further
It has a wire-shaped second contact member 13 made of metal (for example, nickel-manganese alloy). The U-shaped second contact member 13 is formed by bending or cutting it with a machine similar to or similar to the processing machine that formed the first contact member 1.
Manufactured from wooden round wire. The second contact member 13 is 2
The book has vertical rims La, L9 and one horizontal rim L1°. The rims L, t, z of the first contact member 11 and the rims Ls, L9 of the second contact member 13 are arranged in the housing by injection molding or the holes 15.17 and 19.21 of the housing 3 serve for support. It is clamped (fixed) inward.

Housing 3 of switch 1 injection molded from synthetic material
is provided with a so-called wire guide section 23 made of a piece of electrically insulating material, and this wire guide section 23 is manufactured (molded) integrally with the housing 3.
3 is independent of the wire diameter of the first contact member 11. Furthermore, the housing 3 has stop portions 2 for the rims Ls and Lb of the first contact member 11 that are integrally molded with the housing.
5. a rim of the second contact member 13; is supported within the horizontal groove 27 of the housing 3. Switch 1 is the second
It is symmetrical with respect to a plane that is perpendicular to the plane of the figure and includes the I-■ line.

The force is applied to the button 5 in the direction of arrow 7 (see Figure 1).
, the rims Ls, L of the first contact member 11
The ram 9 engaging with the rim 6 causes the rim L to move downward parallel to the Z direction, and at the same time the rim L7
to move parallel to the Z direction.

After the rim L7 has passed through the raised wire guide 23, the rim L7 of the second contact member 13 is connected to the rim L, at two contact points CI+ cm (see FIG. 2). engage with. Rim L
.

The stop portion 25 for L6 and L6 prevents excessive deformation of the first contact member 11 and determines the maximum contact force at the contact point CI+cZ. Since the wire guide 23 has a raised shape, the operator, during switch operation, first faces a uniformly increasing resistance force up to the maximum value, followed by a uniformly decreasing resistance force, and then the maximum value. Feel the resistance increasing evenly again until you feel it. Although the shape of the force-displacement diagram corresponding to the force is often specified by the user of the switch,
This is because by doing this, it is possible to obtain virtual remote support that the switch has been operated. As shown in FIG. 1, in the on state of the switch, after releasing the bushing button 5, a sufficiently large resetting force is applied to the first contact member 11 in order to set the switch to the neutral switch off state. During switch operation, the displacement of the rim parallel to the X direction is caused by the displacement of the rim L3. L.

The first contact member 11 is elastically deformed due to the combination of the bending and the bending and twisting of the rims Ll, t, and z. The displacement of the rim L7 parallel to the Z direction causes elastic deformation of the first contact member 11 due to twisting of the rim Lz, I, a, bending of the rim LllLm, and bending of the rims LS, La.

In the switch 1 shown in FIG. 1-2, the rims L3.
The torsion of Lm is caused by the displacement of rim L parallel to the Z direction. As a result of calculations and measurements, it was found that the bending of L2 and the rim LSI La made a relatively larger contribution than the bending of the rim LSI La. Generally, a combination of bending and twisting is preferred when a relatively small size switch is desired. 1st
Since the contact member 11 is symmetrical, no displacement of the rim L occurs in parallel to the Y direction when the switch is turned on or off. The rim of the first contact member 11 S, La, L? forms a bracket-like or U-shaped part of the contact member, which cooperates or engages with the wire guide and then undergoes a displacement parallel to the X and Y directions. Fore (fo)
This combined movement of the wire-like rim (L, ) in two orthogonal directions along the ur) piece (wire guide 23) allows many variations with respect to the force displacement characteristics and also can have variations. The shape of the two contact members, the thickness and length of the rim, and the shape of the wire guide are useful parameters for the variation of the switch while maintaining the principles of the invention. Another possible combination of the first and second contact members and the wire guide will be described below. The second embodiment of the switch will be described with reference to FIG. 3.4.5, and the same components as those in FIG. 1.2.5 will be given the same reference numerals as much as possible.

3 and 4, a second switch 29 according to the present invention is shown.
The embodiment is distinguished from the switch 1 of FIG. 1.2 with respect to the first contact member 11, in that the rim Ls, La of the first contact member 11 diverges in the direction of the second contact member 13, while In this case, the second contact member 13 is no longer arranged on a single plane and has five limbs. To simplify the drawing, the bushing button 5 has been omitted in FIGS. 3 and 4. Due to the separation of the rims LS and La, it is generally possible to arrange the contacts C+ and Ct laterally away from the region where the rim L engages with the wire guide 23. , on the one hand, the effective torsion length of the rim L3.LA can be made relatively large.Since wear particles are generated in the contact area between the rim L and the wire guide 23, contamination by these wear particles is prevented. Therefore, it is undesirable to place the contacts C,,C, too close to said area.In the first embodiment of the switch 1 shown in FIG. Switch 2
The risk of contamination of contacts C, , C, is basically greater than that of contacts 9. By appropriate selection of the synthetic material used for the wire guide 23 (e.g. Teflon-filled or glass-filled polycarbonate), acceptable variations in the amount of wear and force displacement characteristics can be kept within acceptable limits. . The second contact member 13 of the switch 29 is rimmed on both sides and further has rims LII+LI□. This allows the wire guide 2 to be removed without increasing the overall dimensions of the switch.
Contacts C+ and Ct can be placed relatively apart from No. 3 in the X direction.

Furthermore, the operating force is absorbed by the rim LIO and the stop 25 via the groove 27, so that the rim LIO in the housing 3
+1. No load is applied to the fixed part of q anymore.

As shown in FIG. 5, the operating force Ka exerted on the rims Ls and La by the ram portion 9 of the button button 5 is
(2X l/2Ka) is completely absorbed by the fixed part of the rim LI+t, Z in the housing 3 during switch operation.

At the point of contact, C2, the reaction force is applied to the rim L5 by the rim LIO.
゜It does not affect. The wire guide section 23 receives a horizontal reaction force K.
h on the rim L, and also a vertical reaction force ν is exerted at that location. The reaction force Kh is rim t, I, t, 2
, while the reaction force Kv and the operating force Ka determine the torsion within the rim L3°L. Furthermore, a pair of rims L.

and LI L3 and Lm, Ls and La undergo bending. If both the pair of rims L and L2 or the pair of rims L l rL2 and L3+ Lm of the first contact member 11 are removed, the modifications of switch and 29 described above are preferably obtained.

In fact, the three rims L5. Only the bracket-shaped part constituted by La, L7 remains, the rim L of which cooperates with the wire guide part 23. In the above embodiments, which are fully within the scope of the invention, the rim L
s and La are fixed within the housing. In order to obtain sufficient displacement from the center of the rim L in the X and Z directions,
The rim Ls, I, h, L'l must have a relatively small resistance to bending, and in addition, the rim Ls
, I,b must have a relatively small resistance to twisting. In this case, the paired rims Ll.

Only L is omitted, and rim Lff+La is housing 3.
fixed within. Since the rims Ls, I, a contribute to the displacement of the rim L in the Z direction by twisting, the two pairs of rims L, Lt and L3. In principle, a relatively smaller switch can be constructed than if L4 were omitted.

The wire guide 23 can be constructed as a profile with only one rising edge, or with a rising edge and a falling edge.
Therefore, it is constructed as a molded body having a raised shape. In the former case (having only a rising edge), the force K
a can obtain a force displacement characteristic with only a uniform rise, while in the latter case (with rising and falling edges) the force Ka has a continuous, uniform rise, a uniform fall It is also possible to obtain force displacement characteristics that repeat uniform increases. Within the scope of the invention, all kinds of force displacement characteristics can be easily obtained by means of the wire guide 23. This can be achieved, for example, by using differently shaped inserts in injection molding. The invention has the additional advantage that a series of switches of different dimensions can be obtained without changing the essence of the manufacturing method. By relatively free choice of force displacement characteristics and dimensions, flexible switches can be produced in large quantities.

The switch according to the invention may have intervening and/or closing contacts and may also be of composite construction. The second contact member may be exposed or plated.

In a fixed area, the first. The second contact member may have a rectangular cross section. The wire guide electrically insulated from the second contact member may be made of an insulating synthetic material or of metal.

In the latter case, the wire guide has to be separated from the second contact member by a separating device or an insulating coating.

The wire guide may be a non-integral insert.

The wire guide may be wider or narrower than the distance between the rims L and L6.

Finally, the bushing button 5 may be locked by a hook provided in the housing, or if a gas-tight switch is desired, the bushing button 5 may be integrally connected to the housing 3 by a flexible hinge or a diaphragm. Good too.

[Brief explanation of drawings]

1 shows a first embodiment of the switch according to the present invention, FIG. 2 is a sectional view taken along line I-1 in FIG. 2, FIG. 2 is a plan view of the switch shown in FIG. 1, and FIG. A second embodiment of the switch according to the present invention is shown, and FIG. 4 is a sectional view taken along the line ■-■ in FIG. 4, FIG.
FIG. 3 is a perspective view showing the arrangement of two contact members and a wire-like conductor. 1.29...Switch 3...Housing 5
...Bush button 9...Ram portion 11...First contact member 13...Second contact member L1~. .・
...Rim 15.17, 19.21...Hole 2
3... Wire guide part 25... Stop part 27...
・Horizontal groove C,,C,...Contact FJ5.5

Claims (1)

[Claims] 1. A displaceable first contact member in the form of a metallic wire and fixed to a support at least at one end;
a second contact member cooperating with the contact member, the first contact member having an elasticity determined by the operating force and the resisting force when the first contact member is displaced between the first position and the second position. In a switch in which the resistance force exerted by the wire guide on the first contact member increases with a uniform value during at least partial displacement of the first contact member, the wire guide A protrusion whose dimensions are set independently of the wire diameter of the member and which is electrically insulated from the second contact member, and which cooperates with a U-shaped portion of the first contact member that is displaceable in two orthogonal directions. A switch characterized in that it is configured to. 2. Both the first and second contact members are formed of metal wires, and the U-shaped second contact member is fixed to the support part at two ends of the second contact member, and the second contact member is fixed to the support part at two ends of the second contact member. The first and second contact members are arranged in a plane perpendicular to the plane in which the bracket shape is disposed, and the first and second contact members touch each other at two points of contact at one of the first and second positions of the first contact member. the first contact member engages the wire guide, and the ridge on the wire guide moves the wire guide from a first position on one side of the ridge to a second position on the other side of the ridge. characterized in that, during the displacement of the first contact member, a resistance force is exerted on the bracket profile of the first contact member that first uniformly increases, then uniformly decreases and then uniformly increases again. A switch according to claim 1. 3. The first contact member is symmetrical and includes a pair of parallel first rims, the first rims having one end fixed to the support and the other end having an aligned pair of first rims. The second rim is disposed together with a third rim that is coupled in a pair in a plane that is perpendicular to a plane that includes the first rim that is engaged with the second rim and that forms a pair. 3. A switch according to claim 1, wherein the rims are interconnected by a bridging part, whereby the third rim forms a bracket-shaped part of the first contact member. 4. The switch according to claim 1, wherein the bracket-shaped portion of the first contact member has two rims that diverge toward the second contact member.