Contact lever assembly for use with an electrical switch
A technology for electrical switches and contact rods, which is applied in the parts, electrical switches, electrical components of protection switches, etc., and can solve the problems of poor electrical connection of electrical switches, undesired vibration motion, wear of return springs and contact rods, etc.
Pending Publication Date: 2021-06-18
DEFOND ELECTECH CO LTD +1
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In such existing assemblies, the return spring and contact rod tend to cause wear on each other due to repeated movement of the contact rod and return spring against each other
Furthermore, whenever the contact lever moves between the ON position and the OFF position, due to the elasticity of the return spring, the contact lever tends to experience an undesired oscillatory motion, and this may result in conducting the movable contact part against the fixed contact part. ), and therefore, poor electrical connectivity for electrical switches
Method used
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Embodiment Construction
[0041] will now be referenced here Figures 1 to 6 Preferred embodiments of the present invention are described. This embodiment includes a contact rod assembly 11 (as in Figure 4-6 shown in a stand-alone manner), which are used in power tools (such as Figure 1-3 Shown) the electrical switch 10. Such power tools include, for example, electric drills, screwdrivers, grinders, sanders, saws, rotary drive tools, etc., having a battery and an electric motor arranged in series with the electrical switch 10 . For example, electrical switch 10 may typically be actuated by a button or trigger assembly type actuator device. It will be appreciated and understood that although this embodiment has been described as being used with a power tool, this is only to illustrate the function of the inventive configuration and that alternative embodiments of the invention may of course be used with other types of electrical devices, such as Gardening tools and household appliances. Furthermo...
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The invention relates to a contact lever assembly for use with an electrical switch. The electrical switch includes: a switch housing; a switch circuit disposed within the switch housing; said switch circuit including a movable contact member mounted on a contact lever and a stationary contact member; the contact lever being configured for operable-interaction with an actuator, said actuator being configured for movement along an actuator movement axis relative to the contact lever between at least one of an OFF position whereby the contact lever is configured for arrangement in to the first configuration whereby the switch circuit is opened, and, an ON position in which the contact lever is configured for arrangement in to the second configuration whereby the switch circuit is closed; a biasing element configured for biasing the contact lever towards the second configuration; so that the switch circuit is closed when the actuator is moved relative to the contact lever in to the ON positions, said biasing element including a first end attached to a first attachment point in connection with a portion of the contact lever and a second end attached to a second attachment point in connection with the switch housing; and an attachment member configured for attachment with the contact lever whereby when attached to the contact lever, said attachment member is configured for operation as the first attachment point in connection with the portion of the contact lever.
Description
technical field [0001] The present invention relates to a contact lever assembly for an electrical switch, such as used in power tools and the like. Background technique [0002] In certain electrical switch assemblies, such as those used in power tools, a contact lever having a movable contact is selectively moved into and out of contact with a stationary contact member in response to operation of a trigger actuator of the power tool, The switches are thereby turned on (ON) and turned off (OFF), respectively. Traditionally, the contact lever is usually biased into the OFF position by a return spring, the first end of which is fixed directly to the surface of the contact lever and the second end of which is rigidly fixed to a spaced apart anchor in the switch housing. point. In such prior assemblies, the return spring and the contact rod tend to cause wear to each other due to the repeated movement of the contact rod and the return spring against each other. Furthermore, ...
Claims
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IPC IPC(8): H01H15/06H01H15/10H01H15/02
CPCH01H15/06H01H15/10H01H15/02H01H9/06H01H1/22H01H1/50H01H2225/012H01H71/521H01H71/523H01H71/02
Inventor 王健余
Owner DEFOND ELECTECH CO LTD