JPS58223220A - Electric rotary switch - Google Patents

Abstract

1. Electric rotary switch with a housing open on one side in which is fastened a contact spring (10) simultaneously providing latching, and with an actuating element (3) which is pivoted in a bearing opening of the housing wall, the housing of the rotary switch being formed from two identical housing half shells (1) able to be joined together, in which in the joining direction in each case an identical contact spring (10) is fastened, in a flat adjoining manner, which springs are opposite each other when the housing is joined together, and wherein between both contact spring arms (13) a radially protruding trip cam (16) of the actuating element, arranged between the housing half shells, is able to be introduced in order to bring both contact spring arms (13) into contact with each other or out of contact, by an axial deflection relative to the actuating element (3), characterised in that only the free ends of the contact spring arms (13) aligned on each other are opposite each other, that the free end of the contact spring arm (13) has at least one distanced contact element (15), deflected at a right angle, which is tilted in such a way that the contact element (15) crosses with the opposing one, and that the contact spring arm (13) having two contact elements (15) has, between the contact elements (15), a stamped and therefore protruding latch (18) which interacts with a latching hollow (17) in the trip cam (16) in the sense of locking.

Description

DETAILED DESCRIPTION OF THE INVENTION An electrically rotating switch having an operating member, in which a contact barb, which is also used for a locking action, is installed in the casing, the operating member being attached to a wall of the casing. The present invention relates to an electrical rotary switch that is rotatably supported in a support hole.

Rotary switches of the above type are used not only as individual switches but also as integrated switches in modular systems for variable resistors, for example as so-called power switches. However, in the latter usage example, the rotary switch can be operated using the shaft of the corresponding variable resistor.

DE 2832921-1 describes an electrical rotary switch suitable for integration into a variable resistor. In this rotary switch, two position-fixed connection pieces are provided in a housing that is open on one side. One end of a substantially semicircular contact piece is located in the blade receiver of one of the two connection pieces. This contact piece can be switched angularly between two end positions by means of an actuating member. The contact piece itself is arranged approximately concentrically with respect to the axis of rotation of the operating member, which is rotatably supported in the switch casing by the operating shaft.

The other end of the contact piece is supported by a pivotable tilting member. This tilting member is rotatably held in the switch casing and cooperates with a drive mechanism of the operating member. The operating member has a double square notch in the center. This recess is continuously widened in the radial direction, so that together with the semi-transverse side edges of the driver of the actuating shaft, a certain rotational play occurs. Due to this rotational play, after passing the dead center, the relative force <
, the elasticity of the contact piece forces the tilting member and thus the contact piece to pivot towards one or the other side.

Indeed, an electric six-turn switch for integrating a variable resistor is known, consisting of a casing open on one side, in which a contact spring and a fixed counter contact are mounted. (Ministry of Specifications of the Federal Republic of Germany, Utility Model Registration Pg 7 3 2 6 8 7 4). An operating member is rotatably supported by a shaft in a hole in the wall of the casing. This operating member has a cutout groove on its outer circumferential surface. The protrusion of the contact spring can be locked in this groove. The contact spring is curved within the casing such that the contact spring abuts the operating member in two (2) tangential directions. When the operating member is rotated, the contact spring faces the contact spring unless it is locked. The contacts come into contact.

The entire electrical rotary switch is therefore composed of five different parts. It consists of a casing, an actuating member, a contact spring, counter contacts and a cover which closes the bore of the casing.

The object of the invention is to provide an electrical rotation of the type described at the outset, which consists of as few individual parts as possible of the same construction as possible with respect to one another, and in which the contact barb is forced open when rotating the actuating member. It is to provide a switch.

According to the present invention, this problem is solved as follows.

That is, the mounting of the rotary switch is constructed from two casing half-shells of the same construction that can be joined together, and contact springs of the same construction are formed so that when the casing half-shells are joined together, opposite free ends are formed. In each case, the two contact spring arm ends can be brought into contact with each other or non-contacted by being taken out into the casing half shell with a wide surface and deflecting the two contact spring arm ends in the axial direction with respect to the actuating member. In order to
This allows the radially projecting switching cam of the operating member, which is arranged within the casing and between one shell, to be introduced between the ends of the two contact spring arms.

Advantageous embodiments of the invention are described in the dependent claims.

Next, the present invention will be explained in detail with reference to the drawings with reference to embodiments.

The casing of the electrical rotary switch illustrated in FIG. 1 consists of two casing half-shells 1 of the same construction. These casing half shells 1 are formed into a flat pot shape. Each of the casing half-shells 1 has a circular hole 2 located in the center of the housing wall. An operating member holder arranged in the is rotatably supported by its protrusion 4 projecting into the circular hole 2.K on both sides of the operating member 3 are rotatably supported.

Such a protrusion 4 is formed so that the operating member 3 can be accessed from both sides.

A circular notch 5 is present in the center of the operating member 6 . A large operating shaft (shown in FIG. 1) can be inserted into the circular cutout 5. Using this operating axis, use the entrainer (7
The operating member can be rotated. This operation axis
It can be provided solely for rotary switches or as a component of multiple potentiometers. However, in the latter case, where the operating shaft is a component of a multiple potentiometer, it is possible to adjust the individual potentiometers by means of the operating shaft.

When joining two casing half shells 1 to each other, a formed projecting first pin 6 is used. The pin 6 is inserted into the corresponding first hole 7 of the other casing half-shell 1 and projects slightly. After the two casing half-shells have been joined together, these protrusions are hot-deformed using a stamper so that the two casing half-shells are fixedly joined to each other. As is clear from FIG. A further second pin 8 and a second hole 9 are provided in the casing half-shell.The second pin 8 and the second hole 9 correspond to each other in the opposite casing half-shell. The second pin 8 has
By hot deforming the second pin 8 using a stamper, the contact barb 10 is installed with its wide side in the casing half shell. The contact springs for the individual casing half-shells are of the same construction.

10 individual contact springs manufactured from a conductive material or plated with a nuclide such as silver, base part 1 for mounting;
1. A brazing lug 12 follows the base part 11 towards the bottom. Brazing lug 12Protrudes downward from the Fi casing half shell, brazing lug 1
2 can be used to braze the rotary switch to the printed circuit. On the other side of the base part 11 there is a contact spring arm 13, which has a slightly curved curvature 14 and is slightly arched. At the end of the contact barb arm 13, in the embodiment described here, two contact tabs 15 are provided which are bent at right angles and are spaced one protrusion apart. At least one contact piece 15 can be provided. As can be seen from FIGS. 2 and 5, the straw contact pieces 15 are slanted so that they intersect opposite each other. Therefore, three or more contact pieces were selected in order to achieve good contact stability and, of course, also reduce contact resistance. It is also possible to use a different number.

A switching cam 16 is formed on the operating member 3 and projects laterally. The switching cam 16 has a locking recess 17. A locking projection 18 of the contact spring arm formed by stamping cooperates with the locking recess 17 for locking. The locking projection 18 itself is located between the contact pieces 15.

FIG. 2 shows the rotary switch in the ON switching position. In the ON switching position, the switching cam is approximately in the lower semicircle of the rotation range. Further rotation of the switching cam inserts the switching cam between the contact spring arms that tilt inwardly toward one another. Upon further rotation, the switching cam axially moves the contact spring arms apart from each other with respect to the actuating member until the locking projection engages in the locking recess. This OFF switching position is illustrated in FIG. The contact piece is forcibly opened by inserting the switching cam between the contact spring arms.

In order that the contact spring arm can even be elastically deformed, the housing wall is provided with a reduced thickness section 19. This reduced thickness portion 19 extends from the base portion to the end of the contact spring arm.

The rotary switch consists of five individual parts. However, two of these individual parts, namely the housing half shell and the contact spring, are provided in duplicate. This makes it possible to manufacture the rotary switch at a much lower cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic exploded perspective view of the rotary switch, FIG. 2 is a schematic partial perspective view of the rotary switch in the ON contact position, and FIG. 3 is a schematic partial perspective view of the rotary switch in the OFF K I contact position. 1... Casing half shell, 2... Hole, 3...
- Operating member, 4... Projection of operating member, 5... Notch of operating member, 6... First bottle, 7... First hole, 8... Second pin , 9... second hole, 10...
contact spring. DESCRIPTION OF SYMBOLS 11... Base portion of contact spring, 12... Lug for wax elbow, 16... Contact spring arm, 14... Curved portion. DESCRIPTION OF SYMBOLS 15... Contact piece, 16... Switching cam, 17... Locking recessed part, 18... Locking protrusion part, 19... Thickness reduction part.

Claims (3)

[Claims] (1) An electrical rotary switch with a casing open on one side and an actuating member, in which a contact spring, which is also used for the locking action, is mounted, the actuating member being connected to the casing wall. In an electrical rotary switch that is rotatably supported in a bearing hole, the casing of the rotary switch is connected to two casing half seals (1) or 14L of the same configuration that can be joined to each other.
, contact spring arms of the same configuration are each mounted in the casing half-shell (1) with their wide sides, so that when the casing half-shells (1) are joined together, opposite free ends are formed; by making the end of the spring arm axially oblique with respect to the operating member (3);
In order to bring the two contact spring arm ends into or out of contact with each other, a radially projecting switching cam (16+) of the actuating member (3) arranged between the casing half-shells (1) is used. An electrical rotary switch characterized in that it can be introduced between two contact spring arm ends. (2) A patent in which at least one contact piece 05) bent at a right angle and protruding is provided at the end of the contact arm arm, and the contact piece 09 is inclined so that one contact piece intersects with the opposing contact piece. An electrical rotary switch according to claim (1). (3) A locking protrusion (18) which is stamped and thereby protrudes is provided at the end of the contact spring arm having two contact pieces 09, and placed between both contact pieces 09, and the locking protrusion (18) is stamped and thereby protrudes, and the locking protrusion (18) is provided at the end of the contact spring arm having two contact pieces 09, and is placed between the two contact pieces 09. The locking recess (17) and the locking protrusion Q81 are
An electrical rotary switch according to claim 1 or 2, which cooperates in locking. +41 Connect the casing wall of the casing half shell (1) to the base part 0 as the mounting point for the contact spring 0.
An electrical rotary switch according to any one of claims 1 to 3, wherein the thickness is reduced by Φ from υ to the end of the contact spring arm.