KR910001369B1 - Simplified electric switch construction - Google Patents

Abstract

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Description

Simple electric switch

1 is a cross-sectional view showing an embodiment of a switch of the present invention.

2 is a plan view of the switch of FIG.

3 is a cross-sectional view showing the shape when the switch and the pressing member of FIG. 1 are moved in the right direction.

4 is a sectional view of a switch showing another embodiment.

FIG. 5A is a sectional view of the switch shown in FIG. 4. FIG.

Fig. 5B is a perspective view of the movable contact piece used for the switch shown in Figs. 4-5.

6 is an explanatory diagram showing the operation of the movable contact piece of the switch shown in FIGS. 1-3.

7 is an explanatory diagram showing a switch according to another embodiment of the present invention.

8 is a plan view of a portion of the embodiment of FIG.

9 is a cross-sectional view showing the shape when the pressing member of the embodiment of FIG. 7 is moved in the right direction.

10 is a perspective view showing yet another embodiment of the present invention.

11 is a circuit diagram of an electronic circuit embedded in a dip (DIP) switch of the present invention.

12, 13, and 14 are circuit diagrams showing chip selectors as embodiments of other electronic circuits.

15 is a circuit diagram showing a potentiometer as another embodiment of an electronic circuit.

(A) and (b) are perspective views showing the manufacturing process of the movable contact piece shown in FIG.

* Explanation of symbols for main parts of the drawings

(1a), (1b), (2a), (2b): terminal, (3): insulation stand

(4): switch cover (6): movable contact piece

(7): pressing member (12): protrusion

(13): protrusion 14: shoulder

15: abdomen 16a, 16b, 17a, 17b: inner lead

(18): insulated base 19a, 19b: terminal

(20): Common terminal (31): Insulation base

(32), (33), (34). (35): Terminal (36): Printed Board

(45): switch cover (47): protrusion

53: inner lead.

According to the present invention, an extremely small and simple electric structure capable of simple and stable opening and closing operation suitable for conducting between one terminal and a terminal of a terminal provided in parallel or conducting between one terminal and a common terminal is provided. The present invention also relates to a switch structure, and further relates to an electric switch structure incorporating an electronic circuit capable of extremely miniaturization in which the structure can be easily and stably opened and closed.

Conventionally, many individual switches such as a slide type and a toggle type have connected the opposing contact pieces directly or indirectly through a movable contact piece by a pressing member to obtain conduction between terminals. It is common for switches to be connected between replaced terminals and not to be connected between adjacent terminals.

In addition, even if adjacent terminals are connected, if the same method as the conventional individual switch is used, there is a limit to decrease and the contactability of the contact piece also becomes a problem.

[0003] Further, conventionally, a dip switch having an electronic newsletter that obtains a predetermined electrical conduction through an electronic circuit built between predetermined terminals by appropriately selecting and operating a drive unit of the switch is known. This switch connects the terminals of a conventional deep switch to a necessary part of an electronic circuit formed on a printed board or the like and is housed in a case. The individual deep switch and the electronic circuit are formed to form an ordinary printed circuit board. As it uses, there is difficulty to enlarge. Therefore, it is conceivable to integrate the deep switch with the printed board, but the conventional individual switches used in the deep switch have structural limitations in miniaturization, and furthermore, there is a problem in contact stability from handling micro currents. For example, even if a contact portion printed on a printed board is pressed by a contact piece of a conventional switch, good contact cannot be obtained, and gold plating must be applied to the contact portion of the printed board or the contact piece and the contact area of the contact portion should be increased.

A first object of the present invention is to provide a simple structure suitable for conducting between terminals on each side of the provided terminals or conducting between terminals on each side and a common terminal, so that the opening and closing operation can be stably performed. To provide a switch structure.

A second object of the present invention is to provide an electric switch structure incorporating an electronic circuit which enables extremely miniaturization in which the structure can be opened and closed simply and stably. In order to achieve these objects, according to the present invention, a simple electric switch structure includes an insulator base, a switch cover covered on the insulator base, an inner lead in which terminals disposed in the insulator base are replaced, and a centrally curved abdomen. Iso-typed from a conductor plate having a protruding edge of the insulated base with the projection of the stiffener as a point, and the shoulders and both ends of which are bent in opposite directions to the curvature on both sides thereof and the contact ends formed by the polygonal abstraction Pressing and contacting the abdomen at the projection when moved to each side of the inner lead with a movable contact piece and a protrusion interposed from the inside to the ledge and an arm interposed between the shoulder and the switch cover face It is comprised from the press member which contacts a terminal to each corresponding inner lead, and makes the terminal of each side conduct.

In still another aspect, the electric switch structure is provided with an inner lead of the common terminal, and the movable contact piece is pivotably held on the inner lead with the contact end formed on the knife edge at the center thereof as a point.

Furthermore, in another embodiment, the electrical switch structure has a terminal with a normal external lead having a predetermined heavy snow on both sides of the insulated base and a terminal having an external lead cut off, and the inner lead is branched up and down to form an electronic circuit on the lower surface. The printed board is sandwiched from both sides, and the branched upper inner lead is replaced on the upper surface of the printed board, and the lower inner lead is connected to the necessary portion of the electronic circuit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1 and FIG. 2, the switch of the present invention is covered with an insulating base 3 provided with two bullets 1a, 1b, 2a, and 2b on both sides. The movable contact piece 6 and the pressing member 7 are disposed in the space region 5 formed by the switch cover 4. The movable contact piece 6 is pivotally held by the insulator base 3 with the projection 12 at the center of the abdomen 15 curved gently downward. On both sides, the shoulder 14 and both ends of which are bent in the opposite direction to the curved direction are drilled on the knife edge having an acute angle 17e by the cutting (press) (Fig. 16 (a)) and this is the X direction. Two contact ends 8a, 8b, 9a, and 9b having a polygonal weight, i.e., a triangular vertex P (Fig. 16 (b)), are provided. In detail, the protruding pieces 10 at both ends of the center are protruded from the recess 11 of the base 3, and are disposed as sliding materials with the gentle U-shaped projection 12 downwardly downward.

And the arm 13a of the press member 7 which abutted the protrusion 13 in the inside of the protrusion 12 from the top of the contact piece 6 has the shoulders 14 of both sides, and the surface of the switch cover 4. When the pressing member is moved to the right direction, the abdomen 15 is pressed against the protruding portion 13, as shown in FIG. 3, and the contact ends 9a and 9b of the tip are interposed therebetween. ) Is brought into contact with the inner leads 17a and 17b of the terminals 2a and 2b. The terminals 2a and 2b conduct by the movement of the pressing member 7 in the right direction. In this case, with the movement, the contact piece 6 is elastically deformed so that the inner lead 17a, as it comes into contact with the triangular abstract vertices P at the contact ends 9a and 9b of the knife edge, Since (17b) is scratched as indicated by the dotted line from the solid line in FIG. 6, even if there is a flux adhered to the inner lead or an oxide film is formed, it is scraped off to obtain good contact.

Similarly, when the pressing member 7 is moved to the left, the contact ends 8a and 8b contact the inner leads 16a and 16b so that the terminals 1a and 1b conduct.

In the above example, the case where two terminals on each side of the insulated base 3 are conducted by the contact piece 6 is shown. However, the number of terminals to be conducted is not limited to two but more than that.

Moreover, although the drive system of the contact piece 6 is a slide type by the press member 7, it is not limited to this, Toggle type and rotary type are also possible. Since it is a simpler structure, a smaller one can be obtained by easily applying it to the deep switch.

FIG. 4 shows a switch in which conduction is made between the terminals 19a and 19b disposed on both sides of the insulation stand 18 with the common terminal 20. The same contact as that of the contact piece 6 in FIG. The piece 21 is different from having contact ends 22a and 22b at both ends and contact ends 23a and 23b for conducting with the common terminal 20 at the center side (Fig. 5B). ). In this case, the contact end 23 is intended to stably contact the inner lead 24 (FIGS. 4 and 5A) of the common terminal 20 despite the contact piece 21 being in the neutral position and the contact position. It is preferable to form two edges 23a and 23b made of knife edges. In this switch, the terminals 20 and 19A, the terminals 20 and 19b are alternately conducted by the movement of the pressing member 7a in the left and right directions.

As is evident from the above embodiment, according to the present invention, a switch suitable for conducting between the terminals on each side of the terminal provided in the insulation base or conducting between the terminals on each side and the common terminal is obtained.

In addition, since the structure is simple and stable opening and closing operation, it is applied to an extremely small deep switch that handles a small current.

In the second embodiment of the present invention, a deep switch incorporating an electronic circuit is constructed using the above-described switch structure. As shown in Figs. 7 and 8, the switches are provided with terminals 32, 33 on the left side of the insulator housing 31, and terminals 34, 35 on the right side.

Here, the terminals 33 and 34 are terminals with normal external leads, and the terminals 32 and 35 are terminals with external leads cut off.

These terminals are prescribed wirings. The terminals 32 to 35 have upper and lower inner leads 32a, 32b, 33a, 33b, 34a, 34b, 34a, and 35a branched by internal leads branching up and down, respectively. The printed circuit board 36 formed on the lower surface of the electronic circuit as and 35b is sandwiched from both sides.

The lower inner leads 32b, 33b, 34b, and 35b are connected to the required portions of the electronic circuits described later, are molded, united, and housed in an insulated base.

By embedding in the insulator base in this way, it is possible to greatly reduce the size. The upper inner leads 32a, 33a, 34a, and 35a are disposed on the upper surface of the printed board and formed on the knife edge by cutting at both ends of the contact piece 37 to bend downward. 38), (39), (40), and (41).

The contact piece 37 is smoothly bent from both sides downward, that is, from the conductor plate of a gently inverted U shape, and the projection pieces 42 at both ends of the center are protruded into the recess 43 of the base 31 so as to be centered. The downwardly, i.e., smoothly U-shaped ledge 44 is disposed in the space area 46 under the switch cover 45 as a swinging material.

And the contact piece 37 abuts the projections 47 on the inner side of the projection 44 from above, and both shoulders 49 are abutted by the pressing member 48 which is in contact with the switch cover 45 and is in a neutral position. When the pressing member is moved in the right direction, the abdomen 50 is pressed against the protruding portion 47, as shown in FIG. 9, so that the contact ends 40 and 41 at the front end have upper inner leads 34a. ), 35a. By the movement to the right of the pressing member 48, the terminals 34 and 35 become conductive and at the same time, the terminals 32 and 33 become non-conductive.

In this case, with the movement of the press member 48, the contact piece 37 is elastically deformed, and the upper inner lead 34a is brought into contact with the vertices P of the contact ends 40 and 41 of the knife edge. ) And (35a) are scraped off, even if there is a flux adhered to the upper inner lead, or an oxide film is formed, it is scraped off and exposes the active surface so that a good contact is obtained.

Similarly, when the pressing member 48 is moved to the left direction, the contact ends 38 and 39 contact the upper inner leads 32a and 33a so that the terminals 32 and 33 conduct. At the same time, the terminals 34 and 35 become non-conductive on the contrary.

In the above example, for the sake of simplicity, a case in which two normal terminals and an external lead are cut together are shown on both sides, but the same applies to the example of FIG. 10, and the normal terminal 51 and the external lead, which are properly disposed, are cut out. The conduction may be obtained by contacting two inner leads 53 on the upper side of the terminal 52 with the above-described contact pieces.

In this manner, a deep switch having a predetermined number of slide switches is realized.

The actual dip switch is an electronic circuit formed on the printed circuit board 36, and may be composed of a potentiometer or a chip selector in combination with the switch.

This chip selector is shown in FIG.

Switching any one of the switches a to d of the chip selector changes the corresponding one of the output terminals A 'to D' from the applied voltage Vcc to the ground potential GND. However, the chip selector can handle this even when the output is obtained by binary code. In other words, when a plurality of terminals are synchronized in a switch with a water drop overlap of ⁰ to ^{3 3} on the switches a to d, parallel binary data is obtained at the output terminals A 'to D'.

In the present embodiment, all the elements used in the chip selector were resistors. Instead of the resistors, capacitors, diodes, or logic elements can be used. That is, by interconnecting to the any one of the switches (a~d) connected to the diode 12 in FIG. (D ₁ ~D ₄₎ was calculated by expressing the chip selector of realizing the four-input logical OR circuit. In FIG. 13, for example, when the X terminal is connected to the power supply Vcc and the input terminals A to D are connected to the ground potential GND, any of the switches a to d is conducted. (I ₁ ~I ₄₎ through the indicated one chip selector obtain the inverted output to an output terminal (A'~D ').

Fig. 14 shows a chip selector in which the input terminals A to D and the output terminals A 'to D' are connected to the capacitors C _{1 to} C ₄ by conducting the switches a to _d . FIG. 15 shows a potentiometer for obtaining a predetermined resistance value between the terminals X to Y by conducting whether or not the switches a to d are connected in parallel to each of the resistors R ₁ to R ₄ . Moreover, although the drive system of the contact piece 37 is a slide system by the press member 48, it is also possible to toggle and a rotary type.

In addition, the base 31 and the cover 45 can be mold-molded by a thermosetting resin, but the curing temperature is high (for example, 280 ° C.), and a lot of time is required, which makes manufacturing management cumbersome. For this reason, when a thermoplastic resin is used, temperature for plastic molding is comparatively low (for example, 170-260 degreeC), and the time is also short, manufacture control becomes easy and cost is applied. When the thermoplastic resin is adopted, the enclosure 11 and the cover 32 are softened by the external thermal deformation, but are reinforced by the printed substrate 36 formed by ceramics, glass, epoxy resin, and the like, so as to mechanically and physically adjust the dimensions and strength thereof. Keep it.

Also in the embodiments shown in Figs. 1 to 5A, when the thermoplastic resin is used as the base 3 and the cover 4, the reinforcing substrate as described above (not including an electric circuit) is shown in Figs. By storing at one substrate position, mechanical and physical dimensions and strength can be compensated for when softening due to vertical external thermal deformation occurs.

As is apparent from the above embodiment, the present invention does not use a separate dip switch from the printed circuit board on which the electronic circuit is formed, but instead of using the internal lead branched above and below the terminal to sandwich the printed circuit board and embed the printed circuit board in the insulation stand. And the electronic circuit are integrated, and the switch mechanism part is also exposed to the simple and active surface to make contact, so that even a small current is stable and opens and closes, thereby obtaining a deep switch incorporating an extremely small electronic circuit.

Claims (3)

Internal leads 16a and 16b in which the insulator base 3, the switch cover 4 covered on the insulator base 3, and the terminals 19a and 19b disposed on the insulator base 3 are replaced, (17a, 17b) and the protrusion 12 in the center of the gently curved abdomen 15 as a point, and are arrange | positioned so that it can rock to the insulator base 3, 18, and the said curvature on both sides is different. The seesaw-shaped movable contact piece 6 made of a conductor plate having the shoulder 14 bent in reverse and the contact ends 22a and 22b formed in a polygonal abstraction, and the projection 12 The inner lead 16a, 16b, 17a, having an arm 13a interposed between the protruding portion 13, the shoulder 14, and the face of the switch cover 4 abutting from the inner side, is installed in a neutral position. When moved to each side of 17b) the abdomen 15 is pressed in the projection 13 to contact the contact ends 8a, 8b, 9a, 9b with corresponding inner leads 16a, 16b, 17a, 17b. ) And the terminals on each side A simple electric switch composed of a pressing member (7) for conducting. The insulator base 18, the switch cover 4 covered on the insulator base 18, and the inner leads 16a and 16b in which the terminals 19a and 19b disposed on both sides of the insulator base 18 are replaced. ), (17a, 17b) and the inner terminal 24 of the common terminal 20, and the contact terminals (23a, 23b) formed on the knife edge in the center of the gently curved abdomen 15 as a point the common terminal ( 20. A seesaw type movable member comprising a conductor plate, which is slidably arranged on the inner lead 24 and has opposite ends of the curved portion 14 on both sides thereof, and a contact end formed at both ends thereof in a polygonal shape. It is provided in the neutral position with the arm interposed between the contact piece 21, the protrusion part 13 and the shoulder part 14 which abut from the inner side in the center of the said abdomen 15, and the switch cover 4 surface. And at the same time as the inner lead 24 is pressed against the abdomen 15 in the projection 13 when moved to each axis of the inner lead 24 corresponding inner end 24 A simple electrical switch which is composed of a pressure member (7a) is brought into contact and conduction to the one terminal and the common terminal (20). An insulator base 31, a switch cover 45 covered on the insulator base 31, and terminals 33 and 34 with ordinary external leads of predetermined excretion on both sides of the insulator base 31; The outer leads have terminals 32 and 35 cut off, the inner leads are branched up and down to sandwich the printed circuit board 36 formed on the lower surface of the electronic circuit from both sides, and the branched upper inner leads 32a-35a. ) Is replaced on the upper surface of the printed circuit board 36, the lower inner leads 32b-35b are connected to the necessary portions of the electronic circuit, and the ridge 44 in the center of the gently curved abdomen 15 is pointed to the point. And a conductor 49 having a shoulder 49 and a tip of a predetermined number of contact ends 38-41 formed in a polygonal shape on both sides thereof so as to be swingable on the insulating base 31 and bent in reverse with the curve. Seesaw-type movable contact piece 37 made of plate, protrusion 47 and shoulders abutting the protrusion 44 from the inside. The arm 47a interposed between the 49 and the face of the switch cover 45 is installed at the neutral position and pressed against the abdomen by the protruding portion 47 when moved to the outside of each of the inner leads. Simple electrical switch composed of a pressing member (48) for contacting the inner lead of the corresponding upper side.

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