JPS6199304A - Slide switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slide switch, for example, a slide switch for controlling the rotation speed of a morph of a power tool.

[Conventional technology]

Conventionally, as shown in FIGS. 4 to 8, this type of slide switch has a sliding part 8 of a brush 7 sliding on a resistor 26 in conjunction with the retracting action of a trigger 5, thereby causing an external A method for controlling the amount of current flowing to the output terminal is provided. That is, when the sliding part 8 of the blank 7 slides on the resistor 26 in conjunction with the retracting operation of the trigger 5, the resistance value of the resistor 26 decreases, and the charging voltage of the capacitor C reaches the breakover of the trigger diode TD. When the voltage is reached, the gate of the Cyrisk SCH is fired. After that, when the trigger 5 is pulled in, the external output terminal 1'1' increases in proportion to the firing angle. The electric current IN,m flowing between Ts will increase.

[Problem that the invention seeks to solve]

This type of slide switch requires the pull-in operation of the trigger 5 and the linearity of the output current, so the interlock between the trigger 5 and the plano 7 should be smooth, and the sliding part 8 of the plano 7 should be connected to the resistor 2. An important issue is how to slide it linearly.

However, in this case, the swing 7 is attached to the trigger 5 via the mounting plate 9, but the trigger 5 is attached to the recesses 5a, 5b and the protrusion rt19a of the mounting plate 9.

9a [In this case, if a certain amount of clearance does not exist, the mounting plate 9 will fit between the trigger 5 and the case 20, causing malfunction and return failure], and when the trigger 5 is pulled. During operation, the sliding portion 8 of the swing 7 together with the mounting plate 9 rotates in the direction of the arrow in FIG. 5 or as shown by the sea urchin dot chain line in FIG. There is a problem with this.

[Means for solving problems]

In order to solve the above-mentioned problems, the slide switch according to the present invention is arranged such that the upper part of the base of the brush is oriented in a direction orthogonal to the base. The elastic piece, which is bent and given elasticity in the thickness direction, is attached to one side of the trigger and to the trigger.
The sliding portion formed by folding the base portion parallel to the moving direction of the trigger is brought into contact with the resistor body.

[Action and effect]

In other words, in the above configuration, the brush is held between the trigger and the mounting plate by the elastic piece, and even if there is wobble in the fixation of the mounting plate to the trigger, that wobble will not occur. is absorbed by the elasticity of the elastic piece, and the sliding part of the brush does not rotate as in the conventional case.

Therefore, the output current increases linearly in response to the pull-in operation of the trigger, which eliminates uneven rotation of the motor, etc., and makes it easy to use the slide switch.
I can humiliate you.

〔Example〕

Hereinafter, one embodiment of a slide switch according to the present invention will be described with reference to FIGS. 1 to 3.

Is the trigger l on the top of case 20? It is attached to the attached cover 22 so as to be movable left and right in Fig. 2, and is always moved in the opposite direction to the arrow A by the return spring 3 provided at the rear.
1 biased. Low antibody 26 is case 20
It is provided on the surface of a substrate 25 attached to a holding member 23 provided therein.

On the other hand, the brush 10 is integrally formed by press processing from a thin plate of conductive metal having spring properties, and the base 11 is folded back parallel to the moving direction of the trigger l to form a bifurcated sliding part 12.
．． 12 and provided on the upper part of the base 11 via the neck 13, an elastic piece 14.14 is bent in a direction perpendicular to the base 11. This elastic piece portion 14.14 has elasticity in the vertical direction by being bent slightly upward, and the hole I
By fitting the trigger 5 into the protrusion 17 of the mounting plate 16 and fitting the protrusion 17 into the hole 2 of the trigger 1, the trigger 1 is held and held between the lower surface of the trigger 1 and the upper surface of the mounting plate 16.

The mounting plate 16 has a stepped portion 18 that corresponds to the slit 2 of the holding member 23.
Brush! 0 sliding part 12.1
2 is in contact with the resistor 26. Therefore, when the trigger l is pulled in the direction of the arrow A, the mounting plate 16
3 and moves in the direction of the arrow, the brush lO also moves in the direction of the arrow, and the sliding portion 12.12 slides on the resistor 26. Even if there is looseness between the trigger l and the mounting plate I6 during this retraction, this looseness is absorbed by the elastic piece portion 12.12 of the brush 10, and the sliding portion 12.12 There is no meandering, and a linear output current proportional to the amount of pull of trigger 1 is output.

Note that in this embodiment, other structures such as contact portions, terminal portions, and electric circuits provided on the substrate 25 are the same as those of the conventional one, and their explanations will be omitted.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main parts of a slide switch according to the present invention, and FIGS. 2 and 3 are cross-sectional views of the slide switch in an assembled state. Figures 4 and below show a conventional slide switch. Figure 4 is an internal electrical circuit diagram, Figures 5 and 6 are sectional views of the main parts, Figure 7 is an exploded perspective view of the main parts, and Figure 8. FIG. 2 is an explanatory diagram of the rotating state of the brush.卜...Trigger, 10...Brain, 11...Base, 1
2...Sliding part, 14...Elastic piece part, 16...Mounting plate, 20...Case, 26...Low antibody. Patent applicant: Tateishi Electric Co., Ltd. Agent: Patent attorney: Aohaku Ao and 2 others Figure 4

Claims (1)

[Claims] (1) In a slide switch that controls the amount of current flowing to an external output terminal by sliding the brush on a resistor in conjunction with the pull-in operation of the trigger, bend the upper part of the base of the brush in a direction perpendicular to the base. A sliding slide formed by holding an elastic piece imparted with elasticity in the thickness direction of the lever between one surface of the trigger and a mounting plate fixed to the trigger, and folding back the base in parallel to the moving direction of the trigger. A slide switch characterized in that a portion of the slide switch is brought into contact with the resistor.