BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a control device for an electrical switch. More particularly, the invention relates to a control device that provides rotational damping by way of a magnetic force.

2. Description of the Related Art

A switch in an electric circuit is an electrical device that can be used to close the circuit, stop an electric current, or guide the electric current to another circuit. A typical switch includes two contacts that can be brought into contact with and separated from each other repeatedly. When the contacts are in contact, the circuit where the switch is used is closed to allow an electric current to flow through the circuit; when the contacts are not in contact, the circuit is open, so no electric current can flow through the circuit. The switch, therefore, serves to control the circuit.

To control and adjust circuit signals more precisely, a switch can be added with a control device that provides rotational damping so that fine-tunable and variable control over the switch can be achieved by operating and adjusting the control device.

However, as the control device capable of providing rotational damping is generally integrated into the switch, mounting the switch on the housing or other component of a mechanism may present problems: tolerance stack-up between the circuit board of the switch and the mechanism may lead to positional deviation or misalignment during assembly such that extra working hours are required for putting the aforesaid components together, which makes it impossible to lower production cost or better the quality of the manufacturing process and of the finished product.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to offer a control device that provides magnetic force-based rotational damping, thereby preventing assembly problems associated with positional deviation, reducing the time and cost of manufacture, and enhancing the quality of the finished product as well as the manufacturing process.

To achieve the objective stated above, the present invention discloses a control device that provides rotational damping through a magnetic force. The control device is provided at a base, and the base is provided therein with a switch. The control device includes a supporting member, an adjusting member, and two magnetic members. The supporting member is provided at the base. The adjusting member is rotatably provided on the supporting member. The adjusting member has a bottom portion corresponding to the switch. The adjusting member has a head portion outside the base. The two magnetic members are provided on the supporting member and the adjusting member respectively. The two magnetic members generate a magnetic force therebetween and thereby change the rotational damping between the supporting member and the adjusting member.

Preferably, the adjusting member includes a rotating shaft, and the rotating shaft is rotatably provided in the supporting member.

Preferably, the supporting member has a guiding portion, the rotating shaft is provided in the guiding portion, and the rotating shaft has a bottom portion corresponding to the switch.

Preferably, a first one of the two magnetic members is provided on the supporting member, and a second one of the two magnetic members is provided on the head portion of the adjusting member at a position adjacent to the first magnetic member.

Preferably, the head portion of the adjusting member includes a driving member and a cover covering the driving member.

The detailed structure or features provided by the present invention will be described in the detailed description of the subsequent implementation. As a person of ordinary skill in the art would understand, the detailed description and the specific embodiments provided herein serve only to expound the invention and are not intended to limit the scope of the patent protection sought by the applicant.

