JPS59205116A - Rotary 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 rotary switches used in low current electronic circuits, and more particularly to miniature programmable rotary switches that are inserted directly into printed circuit boards. 1. Conventionally, small display rotary switches that can be directly inserted into printed circuit boards have been used as program setting means for data input devices connected to digital electronic equipment such as computers, test equipment, process control equipment, and medical equipment. Proposed. An example of this proposal is U.S. Pat. No. 4.1.0? , No. 482 discloses a first rotary switch having the following configuration. The structure of the first rotary switch includes an electrically insulative housing having a plurality of holes formed therein, an electrically insulating base, which is rigidly coupled to the electrically insulative base so as to form a straight line with a total distance of 11, a plurality of electrical contacts penetrating the insulative base; a mooring ring which locks the electrically insulating housing to the electrically insulating base when engaged; an electrical contact means within the electrically insulating housing; and an electrically insulating housing provided within the housing;
rotating means for selectively switching the electrical connection between said IW gas contacts by abutting said electrical contact means.

In the case of the first rotary switch above, the electrical contacts are also used to lock the electrically insulating housing to the electrically insulating base, so that the insertion of this rotary switch into the printed circuit board is not possible. At the time of landing, switching of state settings, etc., a mechanical load that causes plastic deformation noise that completely impairs the electrical contact performance of the rotary switch is likely to occur.

Further, US Pat. No. 4,107,482 discloses second and third rotary switches having the following components as more specific examples of the first rotary switch.

The second rotary switch has an electrically insulating enclosure in which a cylindrical hole is formed, serrations that are part of the electrically insulating enclosure and located around the cylindrical hole, and serrations K. , a detent spring with a protruding metal layer that engages as specified, a radial cam with a plurality of lobes, an axially rotating rotor housed in the cylindrical hole, and a periphery of this rotor. Has a protrusion indicating the directional position,
A web extending in the direction of the white frame that mechanically drives the detent spring, and -i! around the rotor and the electrically insulating enclosure. , a plurality of pairs of electrical contacts formed in a line and fixed at intervals, a fixed member provided between each pair of electrical contacts, and a space between the fixed member and adjacent electrical contacts; an electrically conductive beam having a web on which an external mechanical force is applied, the lobe of the radial cam mechanically contacting the electrically conductive beam, thereby applying an external mechanical force to the web of the electrically conductive beam. Additionally, it is characterized in that it thereby breaks the ``terminal contact'' between the fixed member and at least one of the electrical contacts.

In the case of the second rotary switch, there are many troughs of the serrations that are not engaged with the protrusions of the detent spring.
Dust easily enters the interior of the M-swoon enclosure 7, thereby impairing the accidental contact performance of the rotary switch.

Further, the configuration of the third rotary switch includes an fc electrically insulating envelope in which a cylindrical hole is formed, a radial cam in which a plurality of lobes are formed, and an axially rotating rotor housed in the cylindrical hole. , a plurality of pairs of electrical contacts fixed in a straight line at intervals around the rotor in the electrically insulating enclosure, and a fixed member provided between each pair of electrical contacts. and an electrically conductive beam having a web portion to which an external mechanical force is applied between adjacent electrical contacts, and the electrically conductive beam is arranged to engage and disengage the electrical contact at one end. a first part;
A driven cam portion formed at the other end of the first portion and in contact with the radial cam, and a driven cam portion formed at a right angle to the first portion only near one end of the first portion. a second portion affixed to one portion, the foot 20 portion contactingly engages the fixed member;
Characterized by supplying electrical contact to specie while an external mechanical force is applied.

In the case of the third rotary switch, the electrical contact end of the electrically conductive beam to the electrical contact and the mechanical contact end to the radial cam of the rotor are connected to a fixed member supporting the electrically conductive beam. However, the opposing positions complicate the structure of the electrically conductive beams, thereby impairing the reliability of the rotary switch.

An object of the invention is to provide a highly reliable rotary switch.

Another object of the present invention is to provide a rotary switch with stable electrical contact performance. In this rotary switch, the fixed electrical contacts to be connected or disconnected are not subjected to mechanical loads for assembling the nosing and base of the switch.

According to another aspect of the rotary switch, the movable electrical contact portion and the mechanical operating end portion of the torsion coil spring-like movable electrical contact are provided on the same side with respect to the coil portion of the movable electrical contact. , thereby ensuring stable electromagnetic contact performance.

Another object of the present invention is to provide a rotary switch with excellent dustproof effects. In this rotary switch, a hole in the housing from which a manual rotary drive of the rotor for fully mechanically operating the movable electrical contact projects, is provided with a detent mechanism provided between the bottom surface of the rotor and the base. The rotor is pushed up via the locking spring, causing the upper surface of the rotor to close slowly. This K prevents dust from entering the inside of the rotary switch.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the rotary switch 1 is entirely surrounded by an electrically insulating housing 2 and a base 3.

The housing 2 is made of synthetic resin and has a box shape that exhibits the elasticity of a sumo wrestler. and a side plate 5. That is, housing 2
Does not include the bottom sheet metal layer.

The length of the short side of the rectangular side plate 5 is approximately 1/2 of the length of the firing side of the rectangular top plate 40.

A circular hole 6 is formed in the center of the top plate 4.

Around this circular hole 6, there are 10 codes that represent the electrical connection status of the rotary switch 1.
No. 7 are arranged at equal intervals.

A cutout 8 is provided at one corner of the top plate 4 for easily indicating the setting direction of the rotary switch 1.

As shown in FIG. 2, inwardly of the top plate 4 of the housing 2 there are two
Rows of circular recesses 9 (in this embodiment, three recesses are formed in each row). Terminal pins 31, 62, and 66
The inner end of is inserted.

Further, as shown in FIG. 3B, a pair of base hooking portions 12 are formed on the inner surface of the lower end portions of the pair of opposing side plates 5 of the housing 2. These hook hooks 1
2 each have a full insertion guide slope 13 at its lowest end, in a continuous relationship with these insertion guide slopes 13,
Each of them has an upward p and z mounting surface 14, and in a continuous relationship with these base mounting surfaces 14, each has a base fixing vertical surface 15, and these base fixed vertical surfaces 1
5, each has a base fixing slope 16. When the base 6 is press-fitted into the base hooking portion 12vC while abutting the insertion kite 16, these base hooking portions 12 are slightly expanded outward due to the elasticity of the nozzle 2. bend.

The base 3 is made of synthetic resin, and has a pair of vertical surfaces 17 and 18 on the side surfaces of the lower end opposite to each other, corresponding to the pair of hook hooks 12. It has a latching part 20 consisting of a vertical slope 19 between 7 and 18.

The hooking portion 20 of the base filter is press-fitted into the base hooking portion 12 of the housing 2, and as shown in FIG. 3, by being hooked to the base hooking portion 12, The base 6 is fixed so that its vertical play is removed.

Ribs 21 are laterally extended on the other pair of lower end side surfaces of the base (1). This rib 21 consists of a pair of 20 points 22 provided on the inner surface of both lower ends of the housing 2.
The positioning between the first housing 2 and the base 6 is achieved by engaging with the first and second rotors 23a and 2. Rotation position of lsb and/・Ujifugu 20
The correspondence between the coded numbers 7 on the top plate 4 is maintained in a predetermined number 9.

An annular recess 24 is formed in the center of the base B, and a pair of opposing radial tongues 26 of an annular detent spring 25 are supported in the center of the annular recess 24. A flange 827 is formed for this purpose. A fixed shaft 2 for rotor rotation, which is the center of rotation of the first and second rotors 23a and 23b, is connected to the medium heat of the flange portion 27.
8 have been planted.

In the annular recess 24, the circumference ζ of the flange portion 27 is as shown in FIGS.
And the detent peaks 29 and detent valleys 60 for detent of the second rotors 23a and 23b are equiangular) 1iiJ
They are formed radially at intervals. These Dede/Toyama parts 2
9 and 10 detent valleys 60 in this embodiment.

The above Base B Table November is divided into four areas with different heights.

The base B has, in proximity to the hooks 20 on both sides thereof,
Then, three terminal pins ', i, 32 and 66 as fixed pin contacts are aligned in a straight line and implanted.These terminal pins 31, 32 and 66 are ,
Base 6'5r: penetrates through its thickness and protrudes above the surface of the base 60 and below the bottom surface.

Further, these terminal pins 31, 32 and 66) 1 are fixed to the base 6 by being press-fitted into the base 3.

The terminal pins 61, 52 and 66 are all made of prepared alloy, and have gold plating on their surfaces. are doing.

Terminal pin 32VCs located at 1fi in each row above has a torsion coil spring shape! 1 Coil portion 6 of electrical contactor 64
4a is inserted externally. This movable tentacle 641 is made of prepared alloy and is plated with gold.

At the above-mentioned town M generous contactor 34 VC, the coil part 34
The portion extending from a to the left and right is bent to 90' or less at the middle, and furthermore, at the tip thereof, is bent 9 VC inward toward the ring.

90 degrees to the left and right of the above-mentioned driven aerobic contact 64
More than that? r on The kerbed parts are each one of the movable electrical heavy junctions h′l! 34b and the other movable electrical contact 34C, these movable electrical contacts 54b and 640 are connected to the -1 terminal pins 61 and ', respectively.
6611, they are assembled so that they can come into contact with each other and can be detached from each other with an initial stress.

In the IF excitation 4L gas contactor 64, the portions on the left and right sides of which are bent inward so as to cut one end are one mechanically operating end 34d and the other mechanically operating end, respectively. -C makes up the fortune telling 4C.

The iJ dynamic direct contact 64 has the shape of a torsion coil and is assembled between the three terminal pins 61, 32 and 66 with an initial stress, so both machines The target operation ends 34d and 34e are connected to the first and second rotors 2.
3a and 23b, the coil portion 64a is in pneumatic contact with the terminal pin 62, one movable electrical contact portion 34b is in electrical contact with the terminal pin 31; The other movable electrical contact 34
C electrically contacts the terminal pin 63. That is, the frontispiece switch 1 is a normally closed switch.The two pairs of mechanical operating ends 34d and 34e are formed on the first and second rotors 23a and 23b, respectively, and are arranged in four stages. First, second, third and fourth radial cams 65, 3
．． 6. Each is mechanically operated by one of 37 and 68. This allows the terminal bin '62
Q: Will both terminal bins 61 and 66 be electrically connected to each other at the same time? and 66 at the same time.

The first rotor 26a also includes the housing 2 and the base 6.
Similarly, it is made of insulating synthetic resin. This first
The gluer 23a has a manual rotation part 40 provided with a threaded groove 39fc at its upper end.

An arrow 41 is formed at one end of the thread groove 39. This arrow 41 indicates 10 coded numbers 7 from 0 to 91.
Among them, any one coded number 7 to be set
(This is for instructing i7.

A radial cam 65 of the lever 1 is formed on the hand (-) side of the IIυ rotating section 40. A second radial cam "66 is formed on the lower side of the first radial cam 65. Two radial cams" 66 are formed on the lower surface of the second radial cam 66 in a opposed relationship with respect to the middle t9 axis of the first rotor 23a. A circular groove 42 is formed.

In these circular grooves 42, two cylindrical bosses 46 formed on the upper surface of the third radial cam 67 of 26b of the 20th
are inserted respectively. As a result, the first and second rotors 26a and 25b are properly positioned.

A cylindrical boss 44 is formed on the do side of the second radial cam 66. The fixed leg shaft 28 for rotating the rotor of the base 3 is fitted into the cylindrical boss 44, and the cylindrical boss 44r is fitted into the central hole 45 of the second rotor 23b.

The second rotor 23b is also made of electrically insulating synthetic material similar to the rotor 2 and the base 6. .

This second rotor 23b has a third radial cam 67 at its upper end, a fourth radial cam 68 continuous to this third radial cam 67, and a fourth radial cam 68 on the lower side of this fourth radial cam 68. It has a flange portion 46 that abuts a part of the upper surface of the detent spring 25, and a detent spring rotation drive portion 48 is entirely provided below this flange portion 46.

The first, second, third and fourth radial cams 35.3
6.37 and 68 are both provided with a protrusion 65a and a recess 55b on their circumferences. The shapes of the eleventh second, third and fourth radial cams 35, 66, 37 and 68, that is, the protrusion 35a and the recess ffti 3
The position and shape of 5b are determined by the encoded output of rotary switch 1. For example, in the first radial cam 65, the protrusions 35a and the recesses 65b have the same width and are arranged alternately at approximately equal intervals, and in the third radial cam 67, the protrusions 35a and the recesses 35b have a width of 180 mm.
In the fourth radial cam 68, the protrusion 65a has an arc of up to 300°. With the pair of radial tongues 26 fitted together, the detent spring 25 is rotated. As a result, a pair of convexly curved protrusions 50 on the lower surface side of the detent spring 25
is locked in any one of the tetent valleys @60 provided in the annular recess 24 of the base 6.

Since the detent spring 25 is formed to have elasticity so as to be bent in the direction of the upper and lower surfaces thereof, the first and second rotors 23a and 26b assembled to each other are 4, thereby causing the first radial cam 6 of the first rotor 23a to
Press the top surface of the top plate 5 so that it is in close contact with the inside of the top plate 4. Therefore, from the circular hole 6 in the center of the top plate 4, the
The path leading to the inside of the rotary switch 1 is closed to prevent dust in the atmosphere from entering the inside of the rotary switch 1.

As shown in FIG. 5, in the movable electrical contact 64, one movable electrical contact portion 34b and one mechanical operating end 34d are on the same side with respect to the terminal bin 62, and the movable electrical contact portion 34b is on the same side with respect to the terminal pin 62. In addition, since the other movable electrical contact 34e and the other mechanical operating end 64e are on the same side with respect to the terminal pin 62, the contact between the movable electrical contacts 34b and 54c and the terminal pins 61 and 66 is reduced. 3 degrees with high reliability of detachment operation.In addition, the rotating nut 1 has two terminal pins 6
2, since it has four-value movable electrical contact parts 64b and 34ek that electrically open and close independently, it is possible to express a binary coded decimal code.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a rotary switch according to the present invention, FIG. 2 is a perspective view from the bottom of the housing, and FIG.
The figures are a plan view of the rotary switch shown in Fig. 1, and Fig. 3B.
The figure is a sectional view taken along the line IB-IB in Figure 3A, Figure 4 is a positional relationship diagram between the coding number, detent peaks and valleys, and terminal pins, and Figure 5 is a FIG. 2 is a plan view of a first rotor, a movable electrical contact, and a terminal bin; 1...Rotary switch, 2...Housing, 3...
Piece, 4... Top plate, 6... Circular hole, 12... Base hanging part, 16... Insertion guide slope, 14... Base mounting surface, 15... Base fixing vertical Surface, 16...Base fixing slope, 20...Latching portion, 23a and 25b.
...first rotor and second rotor, 25...detent spring, 60...detent valley, 31.32 and 63.
...Terminal pin (fixed electrical contact), 64... Movable electrical contact, 54a... Coil portion, 34b and 64C
... Movable electrical contact part, 64d and 54e... Mechanical operating end part, 40... Manual rotation part. Figure 2 1, Figure 3A, Figure 38, Figure 4 7\th cusp 97--33 e

Claims (3)

[Claims] (1) An electrically insulative housing with a plurality of holes formed therein, an electrically insulative base, and a plurality of stationary electrical contacts that are rigidly coupled to the base in a straight line with a spacing device and that pass through the base. and a rotor having a movable electrical contact in the housing and a manual rotation drive upwardly assembled with an initial stress between these fixed electrical contacts. , a rotor that switches the electrical connection of the fixed electrical contact 11 as selected by contacting or separating from the movable electrical contact. The insulating housing is made of an elastic synthetic resin material, and has an insertion guide surface formed on the inner surface of the opposite lower end of the housing so that the lower end gradually becomes thicker. A base hooking portion is formed, which is continuous with the surface and includes a base mounting surface that engages with the bottom surface of the base, and a base fixing surface that faces the base mounting surface and engages with a part of the side surface of the base. The rotary switch is characterized in that the base is provided with a latching portion having a shape that matches the base latching portion. (2) An electrically insulating nozzing in which a plurality of holes are formed, an electrically insulating base, and a plurality of fixed electrical contacts; sliding electrical contacts in a housing assembled with an initial stress between these fixed electrical contacts; and a rotor with a manual rotation drive on the top surface. and a rotor that selectively switches the electrical connection between the fixed electrical contacts by abutting against or separating from the movable electrical contacts, The movable 7'' (L gas contactor) has a torsion coil spring shape, and the movable 'tJ1 gas contact portion is formed by bending the midway portion of the portion of the torsion coil spring that protrudes from the coil portion in both directions. A rotary switch characterized in that a mechanical operating end portion that engages with the rotor is formed at the tip of a portion projecting in both directions from the coil portion. (3) An electrically insulating housing having a flat top plate with a plurality of holes formed therein, an electrically insulating base, and an electrically insulating base, which is rigidly connected to the base so as to form a straight line at a distance from each other; a plurality of fixed electrical contacts passing through the housing; a movable electrical contact in the housing assembled with an initial stress between the fixed electrical contacts;
A rotor having a manual rotary drive metal on its upper surface, which makes contact with a movable electrical contact or disengages from the movable electrical contact to effect a gas connection between the fixed electrical contacts as selected. In a rotary switch consisting of a switching rotor, a hole is formed in the top plate of the housing to receive a manually rotating part of the rotor, and a detent valley is formed radially in the base and engages with the detent valley as selected. A detent spring with a raised protrusion is interposed between the bottom surface of the rotor and the upper base, and due to the elasticity of the detent pipe, the top surface of the rotor contacts the inner surface of the top plate of the housing. A rotary switch characterized in that it is energized.