CN211294934U - Fixed contact with integrated structure for cam switch and cam switch - Google Patents

Abstract

A fixed contact with an integrated structure for a cam switch, characterized in that the fixed contact comprises a contact part, a connection part and a welding pin which are integrally molded; the contact part can be contacted with or disconnected from a movable contact of the cam switch; the connecting portion is connected between the contact portion and the welding pin; the soldering pins can be electrically connected to a printed circuit board. According to another aspect of the present disclosure, there is provided a cam switch having a fixed contact as described above.

Description

Fixed contact with integrated structure for cam switch and cam switch

Technical Field

The present disclosure particularly relates to a fixed contact having an integrated structure for a cam switch, in which a welding pin is integrally formed with the fixed contact. The cam switch can be soldered to the printed circuit board by a soldering pin. The present disclosure also relates to a cam switch.

Background

As is well known, a cam switch has a switching cam on a rotating shaft. The switching cam is made of an electrically conductive material. The fixed contact and the movable contact are connected and disconnected by the switching cam through the rotating shaft.

Conventional cam switches are not soldered to a printed circuit board, but they have screw terminals for external conductor cables. Such cam switches are not always very space-saving. In elevator applications, a cam switch is a remote control device intended for battery-powered emergency rescue drives. Therefore, they will be mounted on a remote control board, so that they must save space.

The closest prior art is disclosed in prior art EP3104386B 1. It still has screw terminals but the cam switch can be connected to the printed circuit board by soldering pins, i.e. no external conductor cables are required. For this purpose, the soldering pin has an extension which can be fixed to the switching contact element by means of a screw terminal. The problem with this solution is that the screw terminals may be unreliable, e.g. loose.

SUMMERY OF THE UTILITY MODEL

The present disclosure solves the above technical problem by eliminating the screw terminal altogether.

To solve the above-mentioned drawbacks in the prior art, the present disclosure provides a fixed contact for a cam switch having an integrated structure.

The fixed contact includes an integrally formed contact portion, a connection portion, and a welding pin.

The contact part can be contacted with or disconnected from the movable contact of the cam switch.

The connecting portion is connected between the contact portion and the bonding pin.

The soldering pins can be electrically connected to a printed circuit board.

According to one aspect of the present disclosure, the fixed contact is made of a conductive metal material.

According to the above aspect of the present disclosure, the contact portion is bent at an angle with respect to the connection portion.

The welding pin is elongated and extends from the connecting portion.

According to the above aspects of the present disclosure, the angle is a right angle.

According to the above aspects of the present disclosure, the connecting portion has an L-shape.

A shorter first part of the connection portion is connected with the contact portion.

A longer second part of the connecting portion is connected with the welding pin.

According to the above aspects of the present disclosure, the welding pin is provided with a welding pin step.

According to another aspect of the present disclosure, there is provided a cam switch having a fixed contact as described above.

According to the present disclosure, the switch contact element in prior art EP3104386B1 is integrated with a solder pin (i.e., the fixed contact of the present disclosure includes a contact portion, a connection portion, and a solder pin that are integrally molded), thereby eliminating the need for screw terminals. Therefore, the reliability of the switch can be improved and contact with the bonding pin is achieved at the same time.

So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.

As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.

Drawings

The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.

Fig. 1 illustrates a first housing portion of a cam switch according to the present disclosure;

fig. 2 shows a second housing part of a cam switch according to the present disclosure, in which a fixed contact according to the present disclosure is arranged;

fig. 3 shows a third housing part of a cam switch according to the present disclosure, in which a fixed contact according to the present disclosure is arranged;

FIG. 4 illustrates a cam according to the present disclosure;

FIG. 5 illustrates a cam knob according to the present disclosure;

fig. 6 shows an assembly view of a cam switch according to the present disclosure.

Detailed Description

Embodiments of the present disclosure are described in detail below with reference to fig. 1-6.

The present disclosure is directed to prior art EP3104386B1 in which the switching contact element is integrated with the solder pin (i.e., the fixed contact in the present disclosure includes an integrally formed contact portion, connecting portion and solder pin), thereby eliminating the need for screw terminals. Compared with the prior art EP3104386B1, the working mode and principle of the movable contacts of the present disclosure are similar or identical, namely, the movable contacts are driven by the rotation of the cam to overcome the elastic force of the spring to realize the connection and disconnection with the fixed contacts.

One embodiment of the present disclosure provides a fixed contact having an integrated structure for a cam switch.

The fixed contact includes a contact portion 1, a connection portion 2, and a welding pin 3, which are integrally molded.

The contact part 1 can be contacted (connected) or disconnected with a movable contact (not shown) of the cam switch, namely, the movable contact is driven by the rotation of the cam to overcome the elastic force of the spring to realize the connection and disconnection with the fixed contact.

The connection portion 2 is connected between the contact portion 1 and the bonding pin 3.

The soldering pins 3 can be electrically connected to a printed circuit board (not shown).

According to the above embodiments of the present disclosure, the fixed contact is made of a conductive metal material.

According to the above described embodiments of the present disclosure, the contact portion 1 is bent at an angle with respect to the connection portion 2.

The welding pin 3 is elongated and extends from the connection portion 2.

According to the above-described embodiments of the present disclosure, the angle is a right angle.

According to the above-described embodiment of the present disclosure, the connection portion 2 has an L-shape.

A first, shorter part 2-1 of the connection portion 2 is connected with the contact portion.

The longer second part 2-2 of the connecting part 2 is connected to the welding pin 3.

According to the above-mentioned embodiment of the present disclosure, the welding pin 3 is provided with the welding pin step 3-1.

According to another embodiment of the present disclosure, there is provided a cam switch having the fixed contact as described above.

The cam switch comprises a first housing part 4, a second housing part 5 and a third housing part 6 which can be assembled together, as shown in fig. 6.

As shown in fig. 4-5, the cam switch further includes a cam 7 and a cam knob 8, the cam 7 being connected to the cam knob 8 by a fastener such as a screw.

The cam 7 is mounted in coaxial bores 4-1, 5-1 and 6-1 of the first, second and third housing parts 4, 5 and 6.

The first housing part 4, the second housing part 5 and the third housing part 6 are intended to hold fixed contacts having a first length (as shown in fig. 2), wherein the third housing part 6 is also intended to hold fixed contacts having a second length (as shown in fig. 3), the second length being smaller than the first length.

While the disclosure has been described in the specification and drawings with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosure as defined in the claims. Moreover, the combination and arrangement of features, elements and/or functions between specific embodiments herein is clearly apparent and thus, in light of this disclosure, one skilled in the art will appreciate that features, elements and/or functions of an embodiment may be incorporated into another specific embodiment as appropriate, unless described otherwise, above. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the essential scope thereof. Therefore, it is intended that the disclosure not be limited to the particular embodiment illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out this disclosure, but that the disclosure will include all embodiments falling within the scope of the foregoing description and the appended claims.

Claims (7)

1. A fixed contact with an integrated structure for a cam switch,

the fixed contact comprises a contact part, a connecting part and a welding pin which are integrally formed;

the contact part can be contacted with or disconnected from a movable contact of the cam switch;

the connecting portion is connected between the contact portion and the welding pin;

the soldering pins can be electrically connected to a printed circuit board.

2. A fixed contact according to claim 1,

the fixed contact is made of a conductive metal material.

3. A fixed contact according to claim 1,

the contact portion is bent at an angle relative to the connection portion;

the welding pin is elongated and extends from the connecting portion.

4. A fixed contact according to claim 3,

the angle is a right angle.

5. A fixed contact according to claim 1,

the connecting part is L-shaped;

a shorter first part of the connection portion being connected with the contact portion;

a longer second part of the connecting portion is connected with the welding pin.

6. A fixed contact according to claim 3,

and the welding pin is provided with a welding pin step.

7. A cam switch, characterized in that it has a fixed contact according to one of the preceding claims.

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