JPH037858Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a rotary switch, and in particular, moderation switching is performed by bringing a metallic elastic member fixed to a rotor into elastic contact with an uneven surface provided in a housing. Regarding rotary switches that perform

(Summary of the invention) In order to obtain a compact rotary switch with clear switching, stable operation feel, and good assembly, this invention provides a roughly U-shaped groove in the rotor.
A bent part provided at the center of an elastic member made of a thin metal plate bent into a symmetrical substantially W-shape is press-fitted into the groove, and an uneven surface is formed in the housing, and the elastic member The object of the present invention is to provide a rotary switch that is inexpensive, highly reliable, and has a long service life by bringing the rotary switch into elastic contact with the uneven surface.

(Prior Art) A rotor of a conventional rotary switch has a structure as shown in FIG. 4, for example. That is,
The rotor consists of a rotor body 1 and a moderation member 2,
Both are integrally formed. Further, the moderation member 2 is made of a plastic member, and elastic arm portions 2-1 are formed on both sides thereof. Although not shown, an uneven surface is formed inside the housing, and the tip of the elastic arm portion 2-1 comes into elastic contact with this uneven surface to perform moderation switching.

Further, a rotary switch having a rotor configuration as shown in FIGS. 5 and 6 has also been proposed. That is, the rotor of this rotary switch consists of three parts: an upper cover part 3, a spring part 4, and a rotor lower cover part 5, and the spring part 4 is attached to a base 4-1 with a plate spring body 4.
-Constructed by caulking 4. A projecting piece 4-2 in which a driving pin 4-3 is implanted is provided on one side of the base 4-1, and a through hole 4-2 is provided in the center of the base 4-1 and the plate spring body 4-4. 5 is provided, and a plurality of through holes 4-6 are provided around it. Further, one side of the plate-shaped spring body 4-4 is provided with a side plate portion 4-7 formed into a flat surface.
-7 A pair of arm portions 4-8 extending on both sides are formed. In addition, a spring portion 4 is provided at the center of the rotor lower lid portion 5.
and a boss 5-1 for assembling the rotor top cover 3
is provided and a plurality of protrusions 5-2 are provided around it.
will be provided. Therefore, the through hole 4-5 provided at the center of the spring portion 4 is fitted into the boss 5-1, and further,
The projection 5-2 is fitted into the through hole 4-6 of the spring portion 4, and the spring portion 4 is fixed to the rotor lower lid portion 5 by caulking. The rotor upper lid part 3 and the rotor lower lid part 5 are integrated by press fitting or the like. Although not shown, a printed board is provided at the bottom of the rotor lower lid, and a base is provided at the bottom of the printed board, and a protrusion protruding from the center of the base is engaged with the hole of the boss 5-1. However, the rotor is supported by the base via a printed board.
An example of this type of rotary switch is disclosed in Japanese Utility Model Application Publication No. 58-98735.

(Problem to be solved by the invention) However, in the rotor of the rotary switch shown in FIG. However, they have low elasticity, are prone to fatigue deformation, have a short lifespan, and tend to have unclear switching, resulting in a poor operating feel, and deformation is particularly significant in high-temperature environments. Furthermore, when rotating the rotor, if the rotor is accidentally stopped in the middle of the switching step and left for a long period of time, the rotor will become significantly deformed due to fatigue, resulting in extremely unclear switching or a reduced operational feel. It was hot.

In addition, in the rotor of the rotary switch shown in Figs. 5 and 6, the rotor is divided into three parts: the upper cover part, the spring part, and the lower cover part, which increases the number of parts and the assembly process, which reduces costs. This was a problem because it took a lot of effort to lift and assemble. Furthermore,
The rotor consists of three parts: an upper lid part, a spring part, and a lower lid part, and the spring part consisting of a base 4-1 and a plate-shaped spring body 4-4 is sandwiched between the upper lid part and the lower lid part. This increases the height of the rotor, which is a factor that prevents the switch from becoming more compact.

The object of the present invention is to eliminate the above-mentioned problems and provide a rotary switch that has clear switching, stable operation feel, good assembly, and is compact.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a rotor provided in a housing, a rotary shaft provided in the center of the lower surface of the rotor, and a movable rotor that can rotate together with the rotary shaft. A rotary switch is provided with a base on which a contact plate is attached and a fixed contact piece corresponding to the movable contact plate is attached, and the tip of the rotating shaft is inserted into a recess provided in the center of the base. is a thin metal plate having a substantially U-shaped groove 20, a bent part 21-1 in the center, and elastic arms 21-2 extending from the bent part 21-1 to both sides, and is symmetrical. An elastic member 21 bent into a substantially W-shape is provided, the bent portion 21-1 is press-fitted into the groove 20 of the rotor, and the tip of the elastic arm portion 21-2 is formed inside the housing 23. Uneven surface 23-
3 to perform moderation switching.

(Function) Into the substantially U-shaped groove 20 of the rotor, a bent portion 21-1 provided at the center of an elastic member 21 made of a thin metal plate and bent into a symmetrical substantially W-shape is press-fitted. to form the rotor. As the rotor rotates, the movable contact plate 15 also rotates, and the movable contact plate 1
The conductive pattern formed on the lower surface of 5 and the base 11
The electric circuit is switched by the contact/separation action with the fixed contact piece 12 provided at. In this switching, the convex portion 21-3 of the elastic arm portion 21-2 comes into elastic contact with the uneven surface 23-3 formed inside the base 11, and moderation switching is performed.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cutaway plan view of essential parts of a rotary switch according to the present invention, FIG. 2 is an exploded perspective view of the rotary switch, and FIG. 3 is a sectional view of the rotary switch.

In the figure, 11 is a base, 12 is a fixed contact piece, 13 is a contact terminal 14 is a recess, 15 is a movable contact plate on which a conductive pattern is formed on the lower surface, and 15-1 is a hole provided in the center of the movable contact plate 15. , 15-2 is a hole into which the drive protrusion 19 provided at the lower part of the base of the rotor fits, 16 is the cylindrical part of the rotor, 17 is the base of the rotor, and 18 is a rotating hole provided at the center of the lower part of the base 17 of the rotor. 19 is a drive protrusion provided at the lower part of the base 17 of the rotor; 20 is a groove formed in the rotor base 17 for press-fitting an elastic member for providing a click action; and 21 is a metallic elastic member. It cooperates with the uneven surface provided inside the housing to produce the quick action of the rotary switch. The elastic member 21 is made of a thin plate and has a substantially W-shape. That is, it has a bent part 21-1 in the center, elastic arms 21-2 extending from the bent part 21-1 to both sides, and a convex part 21-3 is formed at the tip of each elastic arm part 21-2. and,
The bent portion 21-1 is tightly press-fitted into the groove 20. Reference numeral 22 denotes an O-ring, which is attached to a portion where the cylindrical portion 16 of the rotor passes through the housing 23, as shown in FIG. 23 is a housing, and the center has a boss 23-1 having a through hole 23-1.
2 is formed, and an uneven surface 23-3 that cooperates with the elastic arm portion 21-2 to produce a quick action is formed on the inner surface of the housing.

In this way, in this rotary switch, the rotor can be constructed by simply press-fitting the bent portion 21-1 of the elastic member 21 into the groove 20 provided in the base 17 of the rotor.
A rotating shaft 18 is provided at the center of the lower part of the rotating shaft 18.
A movable contact plate 15 is attached to the base 11, and the tip of the rotary shaft 18 is inserted into a recess in the center of the base 11 where the fixed contact piece 12 is provided. Therefore, an O-ring 22 is attached to the cylindrical portion 16 of the rotor, and a boss 23-2 having a through hole 23-1 of the housing 23 is attached to the cylindrical portion 16.
The rotary switch is assembled. Note that the housing 23 and the cylindrical portion 1 of the rotor
Since an O-ring 22 is installed between the housing 23 and the housing 23, an O-ring 22 is installed between the housing 23 and the housing 23 to maintain airtightness and improve the waterproof effect. The upward movement is restricted by the bottom surface of the boss 23-2 provided on the inner surface. In other words, since the elastic member 21 is press-fitted into the groove 20, it does not normally come off.
Even if an attempt is made to escape, the bottom surface of the boss 23-2 prevents the escape.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the invention) As explained in detail above, according to the invention, (1) the elastic member for moderation switching can be fixed simply by press-fitting into the groove formed in the rotor; Therefore, the rotor is divided into two parts, an upper cover part and a lower cover part, as shown in Figs. 5 and 6, and a spring part consisting of two parts, a base and a plate spring body, is sandwiched between them. It is possible to provide a rotary switch that does not require mounting, has a small rotor height, has a simple structure, is easy to assemble, and is particularly thin.

(2) Since the rotor has a structure in which a metallic elastic member is fitted, there is no deformation or creep even when the rotor is stopped in the middle of a step and left unattended.
There is no possibility of unclear switching or deterioration of operational feeling.

In particular, it is possible to provide a rotary switch that has high elasticity, good switching moderation feel, and is stable for a long period of time, that is, has a long rotational life even under high temperatures.

(3) The elastic member is formed into a symmetrical approximately W-shape, with a bent part in the center, and is press-fitted into the approximately U-shaped groove formed in the rotor, so that the elastic member does not stick. It is robust, eliminates poor operating feel due to displacement or rattling of the elastic member, and provides a stable operating feel despite its extremely simple configuration.

In addition, since the fixation is strong due to the elasticity of the bent portion, the elastic member has a uniform cantilever beam at both ends, and it is possible to obtain the same operational feeling regardless of whether it is rotated to the right or left.

(4) Since the elastic member can be formed into a thin plate shape, the shape is simple, and it can be mass-produced at low cost using a forming machine or the like in a fixed direction without considering the grain direction. .

(5) A rotating shaft is formed below the rotor, a movable contact plate is attached to this rotating shaft, and the tip of the rotating shaft can be inserted into a recess provided in the center of the base, so that the rotary switch can Assembly work can be done easily. Therefore, the manufacturing cost of the rotary switch can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a cutaway plan view of the main parts of the rotary switch according to the present invention, Fig. 2 is an exploded perspective view of the rotary switch, and Fig. 3 is a sectional view of the rotary switch.
FIG. 4 is a perspective view of a rotor of a conventional rotary switch, FIG. 5 is a front view of a rotor of another conventional rotary switch, and FIG. 6 is an exploded perspective view of the rotary switch. DESCRIPTION OF SYMBOLS 11... Base, 12... Fixed contact piece, 14... Recess, 15... Movable contact plate, 16... Cylindrical part of rotor, 17... Base of rotor, 18... Rotating shaft, 2
0... Rotor groove, 21... Elastic member, 21-1
...Bending portion, 21-2...Elastic arm portion, 21-3...
... Convex portion, 22 ... O-ring, 23 ... Housing, 23-1 ... Through hole, 23-2 ... Boss, 2
3-3...Uneven surface.

Claims (1)

[Scope of utility model registration request] A rotor provided in a housing, a rotating shaft provided at the center of the lower surface of the rotor, a movable contact plate rotatable with the rotating shaft mounted thereon, and a base fitted with a fixed contact piece corresponding to the movable contact plate. In the rotary switch, the tip of the rotating shaft is inserted into a recess provided in the center of the base, the rotor is provided with a substantially U-shaped groove and has a bent part in the center, An elastic member is provided which is made of a thin metal plate bent into a symmetrical substantially W-shape and has elastic arms extending from the rotor to both sides, and the bent portion is press-fitted into the groove of the rotor. A rotary switch characterized in that the moderation is switched by bringing the tip of the section into elastic contact with an uneven surface formed inside the housing.