JPS59117023A - Switch - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch used for opening and closing an electric circuit, and more particularly to a switch that closes a circuit when pressed.

In this type of conventional switch, when the operating member is pressed with a finger, the spring plate pressed by the operating member flexes and contacts the electrode, and when the finger is removed from the operating member, the elasticity of the spring plate allows the switch to be operated. It is known that the spring plate is moved away from the electrode when the member is returned to its original position.

However, this type of device has the disadvantage that the wires can get stuck between the spring plate and the electrode, causing poor contact. Since two forces are required: the force to push back the spring plate and the force to separate the spring plate itself from the electrode, there is a drawback that the rate of separation is slow and chattering occurs. Furthermore, if the spring force of the spring plate was increased to eliminate this drawback, a large force would be required when pressing with a finger, resulting in poor operability.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a switch that can prevent poor contact due to the intrusion of dust, is less prone to abnormalities such as chattering, and has good operability.

The drawings showing the embodiments of the present application will be described below.

In FIGS. 1 to 6, reference numeral 1 denotes a base body, which is manufactured by molding an insulating material such as hard rubber, ABS resin, As resin, polyacetal resin, etc. Its planar dimensions are, for example, about 1.4 m x 1.4 cm.

In this base body 1, reference numeral 2 designates a plate-shaped base portion, and a recessed portion 3.3 is formed on the upper surface of the base portion. Reference numeral 4 indicates a rising portion raised from the periphery of the base portion 2, and its upper surface 4a serves as a joint surface. A positioning piece provided on the inner circumferential side of the 5-digit vertical part 4,
Above it is an inclined guide surface 6 as shown in FIG. Reference numeral 7 denotes four legs projecting from the lower surface of the base 2, one of which has a retaining piece 8 projecting therefrom.

Next, u, 12.12 indicate electrodes, a part of which is exposed on the upper side of the base 2, and the top of the electrode 11 is flush with or slightly higher than the top surface of the electrode ν).The rest is inside the base 2. Prepared for burial. These electrodes are made of a metal material such as phosphor bronze or nickel silver. 8.14
are lead pieces, 1.1 to 1.2 mm wide, 0.4
The electrodes 11 and 12 are individually connected to the electrodes 11 and 12 through connection pieces 15 and 16, which are formed to have a thickness of approximately 1.0 mm and are buried inside the base 2, respectively. Next, 17 indicates a spring plate made of a metal material with good elasticity, such as stainless steel, phosphor bronze for springs (
It is formed into a curved shape that bulges upward as shown in the figure using plating with gold, silver, etc.). In this spring plate 17, reference numeral 17a indicates the central portion, which faces the electrode 11, and c17b indicates the edge, a portion of which overlaps the upper surface of the electrode. Next, the slide is a sealed body, which is manufactured by molding a flexible and flammable material such as rubber, Belklein (trade name), vinyl chloride, etc.

In this sealing body, a push portion 19 is in contact with the upper surface of the center portion 17 & of the spring plate. The flange is made up of a peripheral connecting part 4 and a thin (0.7 to 0.8 mm thick) hinge part ρ that connects the connecting part 21 and the pushing part 19. In other words, the lower surface 211 of the connecting portion 21 and the joining surface are tightly joined to the joining surface 4a of the rising portion 4. As a result, the space surrounded by the base 1 and the sealing body is in a sealed state. As the above-mentioned bonding means, any method such as ultrasonic bonding, bonding using a solvent, bonding using an adhesive, bonding by heating, etc. can be used. Alternatively, it may be possible to form a male thread on one of the peripheral edge of the base body 10 and a peripheral edge for the sealing body and a female thread on the other, and screw them together. The wing is a fitting piece, and its outer peripheral surface 23a has the same slope as the guide surface 6, and there is a slight gap between it and the inner peripheral surface of the rising part 4 in the section where the guide surface 6 does not exist. It is possible to do so.

The above-mentioned switch is used by being attached to a circuit board 6 as shown in FIG. 1, for example. In the case of this installation, the lead piece 14 is made into a circuit board part, and after being inserted into the through hole 26, the circuit conductor (copper foil) 2 is attached to the circuit board unit.
7 by soldering, and the retaining piece 8 is engaged with a through hole 4 formed in the substrate 6.

On the other hand, when operating the switch, press the pusher 19 downward in the figure with your finger. Then, the hinge portion η and the spring plate 17 are bent as shown in FIG. 6, and the center portion 17a of the spring plate 17 comes into contact with the electrode 1. With this, l) Between the lead pieces 13 and 14, there is a connecting piece 15, an electrode ■, and a spring plate 17.
, the electrodes become electrically connected via the connecting piece 16. In addition, when the pushing part 19 is pressed, even if the fitting piece n deforms outward as shown in FIG. The existence of the gap provided therein does not impede its movement in any way, and therefore the pushing operation force required of the pushing portion 19 does not become large. (At the location where the guide surface 6 is provided, the outer circumferential surface 23a comes into contact with the guide surface 6, but since the section where the guide surface 6 is provided is relatively small as shown in FIG. (There is no need for a particularly large pushing force due to the presence of Since the space surrounded by is sealed, the air inside is in a compressed state.

Next, when you release your finger from the pusher 19, the pusher 19 moves as shown in FIG.
As shown in FIG. 4, the spring plate 17 returns to its original state and the lead opening is returned to its original state. The continuity +a between 140 and 140 is cut off. When the pusher 19 and the spring plate 17 return as described above, the moment you release your finger from the pusher 19, the pusher 19 receives a large urging force in the return direction due to the pressure of the compressed air. Because it is there, it is pushed back elastically by that force.

In this case, since the volume of the space is increased due to the presence of the recess 3, the force of the air pressure pushing back the pusher 19 continues to act until the pusher 19 approaches its original return position. In this way, since the pushing part 19 is pushed back by the elasticity of the air, the spring force of the spring plate 17 is applied to the central part 17a of the spring plate 17.
can be used only to separate from the electrode 11, and therefore the separation speed between the electrode (2) and the central portion 17a becomes extremely high. As a result, chattering between the two is prevented.

Further, in the switch having the above structure, the creepage distance between the stain poles 11 and 12 is increased due to the presence of the recess 3, and the insulation between them is increased. Further, even if dust is released in the sealed space, it will collect in the recess 3 and the dust will cause the electrode ■ and the central part 17a of the spring plate 17 to
, the occurrence of a failure in which electrical contact between the electrode and the edge 17b is inhibited is extremely low.

Next, FIG. 7 shows the manufacturing process of the above switch. In FIG. 7, first, a metal material 31 wound into a coil shape is supplied as shown. This metal material 31 is punched out as shown in the figure in the first step A, and the original shapes ua and va of the electrodes 11 are formed. Also, at this time, positioning members for positioning the material in various devices (a press device, a plastic molding device, etc.) are also formed at the same time. In the next step B, processing such as folding and drawing is performed (for example, using a press machine).
Electrodes 1 and 12 are formed. Next, in a step indicated by C, the base body 1 is formed of a resin material, in which case the side base bodies 1.1 are formed in the well-known runner-shaped connection. Next, in a step indicated by D, the spring plate η and the sealing body are assembled.

When assembling the spring plate ν, the presence of the guide surface 6 allows the spring plate d to be easily assembled in a predetermined position (by simply dropping the bevel from the top). After that, in a step indicated by E, the peripheral edge of the base 1 (joint surface 4a) and the peripheral edge for the sealing body (joint surface 21a) are joined. Next, in a step indicated by F, unnecessary connecting portions and positioning cuticles are cut. After that, in the step indicated by G, the lead piece 13
, 14 are bent and the runners are cut out to form the switch as described above.

Since each of the above steps is sequentially arranged along the moving path of the material 31 as shown in the figure, the switch can be manufactured in a highly efficient manner.

Next, FIG. 8 shows a different embodiment of the present application, and shows an example in which the sealing body is formed of two members.

In the figure, the flange portion 20e is made of a slightly hard resin material and has a cylindrical support portion at its center.

On the other hand, the pushing part 19e is inserted through the support part δ, and the seam plate provided around it is in airtight contact with the inner circumferential surface of the support part. Also, a flange-like retaining piece a is provided at the lower end of the push part 19 el.
is provided to prevent the push portion 19e from being pulled out from the support portion 5.

Even in such a configuration, the base 1e and the sealing body 1
Since the space surrounded by 8e is sealed, dust may adhere to the electrodes, spring plates, etc., and the same operation as described above can be expected when the pusher 19e returns.

It should be noted that parts that are considered to have the same or equivalent structure as those in the previous figure in terms of function are given the same reference numerals as in the previous figure with the letter e, and redundant explanations are omitted.

As described above, in this invention, two types of electrodes 1 and 12 are arranged on the base 1, and these electrodes 11, 12,
Above 12, spring plates 17 made of a conductive material are arranged in an overlapping manner, and the relative positions of these electrodes and the spring plates are such that the edge 17b of the spring plate 17 overlaps one electrode ν. At the same time, the center part 17 & of the spring plate 17 is made to face the other electrode (2) so as to be able to freely approach and separate from it, and above the spring plate (2), there is a push part 19 in the center part facing the center part of the spring board. A sealing body m having a flange integral with the pushing part is disposed around the sealing body m, and a peripheral edge 21 & is for the base body with respect to the peripheral edge 4a of the base body. (a) When the pusher 19 is pressed, the spring plate 17 is bent and the center portion is connected to the electrode H. (2) It has a sealed structure, so when in use,
It is possible to prevent moisture, detergent, dirt, etc. from entering the space in which the electrodes 1 and 12 and the spring plate 17 are housed, and there is an effect that these members can be used for a long time by being prevented from being damaged.

(C) Moreover, since it has a sealed structure, when the pusher 19 is pressed with a fingertip, the air inside is compressed, and when the fingertip is released, the pressure of the compressed air moves the pusher 19 in the return direction. It has the advantage of being able to return elastically with a large starting force. This allows the spring plate 17 to instantly separate from the electrode (without the push part 19 acting as a load) due to its elasticity, which has the effect of preventing the occurrence of chattering. , the elasticity required of the spring plate 17 for such quick cutting is small,
As a result, there is also the effect that the force required for pressing is reduced and operability is improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and Fig. 1 is a front view showing the installed state, Fig. 2 is a partially cutaway view, Fig. 8 is a sectional view taken along the line ■--, and Fig. 4 is a ff- ff line sectional view, Figure 5 is an exploded perspective view, Figure 6 is a diagram similar to Figure 4 showing the state during operation, Figure 7 is a perspective view explaining the manufacturer's hand +1@, Figure 8 is different. FIG. 2 is a vertical cross-sectional view showing an example. DESCRIPTION OF SYMBOLS 1... Base body, 11, 12... Electrode, 17... Spring plate, Quick sealing body, 19... Push part, and... Flange part. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] Two types of electrodes are disposed on the base, and spring plates made of a conductive material are disposed above these electrodes in an overlapping manner, and the positions of the electrodes in relation to the spring plates are The edge of the plate overlaps one electrode, and the center part of the spring plate faces the other electrode so as to be able to come into contact with and separate from the other electrode, and above the spring plate, the center part faces the center part of the spring plate. A sealing body having a flange integral with the pressing part is disposed around the pushing part, and the peripheral edge of the sealing body is in contact with the base body with respect to the peripheral edge of the base body. A switch characterized by being joined to the body so that the space surrounded by the body is sealed.