JP3889105B2 - Switch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch device in which an operation knob is supported on a swing center shaft provided in a switch body, and a switch unit is operated by the operation knob to perform switching.
[0002]
[Prior art]
In the switch device described above, as shown in FIG. 4, a printed wiring board b on which the switch unit a is fixed in advance is attached to the switch body d that supports the operation knob c. The contact switching angle of the operation knob c varies depending on the variation of the fixed position of the switch unit a. For this reason, there are cases where the contact cannot be switched unless the operation knob c is operated largely, or the contact is switched only by a slight operation.
[0003]
[Problems to be solved by the invention]
However, in order to reduce the variation in the contact switching angle of the operation knob, it is necessary to suppress the variation in the dimensions of the components such as the switch body and the printed wiring board and to manage the variation in the switching point of the contact of the switch unit itself. . Furthermore, it is necessary to select a material with little dimensional variation due to temperature change. For this reason, it was a factor of high cost.
The present invention has been made in view of the above points, and an object of the present invention is to provide a switch device capable of reducing the cost by directly positioning the switch body and the switch unit.
[0004]
[Means for Solving the Problems]
To achieve the above object, the switch device of the present invention supports an operation knob on a swing center shaft provided in a switch body, and operates the switch unit with the operation knob to perform switching. A fitting structure that fits between the switch body in a male-female relationship and a plurality of terminals protruding from the switch unit and a plurality of terminals inserted into the switch body are provided with a joint structure, and the fitting by the joining of the fitting and the junction structure of the interleaf structure, wherein the positioning and fixing the switch unit to the switch body.
[0005]
[Action and effect of the invention]
According to the switch device configured as described above, the fitting of the fitting structure provided between the switch body and the switch unit positions the switch unit with respect to the switch body, and the plurality of terminals and the switch protruded from the switch unit. By joining the joint structure provided between the plurality of terminals inserted into the body, the switch unit can be directly positioned and fixed to the switch body without going through the printed circuit board . For this reason, it is not necessary to manage the variation in the positional relationship between the printed wiring board and the switch body as in the prior art, and to reduce the variation in the contact switching angle of the operation knob. Therefore, the switch device of the present invention has an effect that can contribute to cost reduction.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional view taken along line AA in FIG. 2 of the switch device according to the present embodiment, FIG. 2 is a cross-sectional view taken along line BB in FIG. 1, and FIG. A support cylinder 2 is formed on the upper surface of the switch body 1. The inside of the support cylinder 2 is divided into two sections, and a section 3 on the near side in FIG. 1 penetrates through the upper surface wall of the switch body 1 and communicates with the inside of the switch body 1. The partition 4 on the other side has a bottomed shape with the upper surface wall of the switch body 1 as the bottom surface.
[0007]
As shown in FIG. 2, the operation knob 5 covered from the upper side of the support tube 2 is freely swingable by fitting the swing center shaft portions 7 and 7 of the support tube 2 into shaft support holes 6 and 6 formed on both side surfaces. It is supported by. The operation knob 5 is formed with an operation arm 8 that protrudes from the compartment 3 into the switch body 1. Further, a cylindrical portion 9 protruding into the compartment 4 is formed, and a coil spring 10 and a pusher 11 are inserted into the cylindrical portion 9. The pusher 11 is pressed against a slope 12 formed on the bottom surface of the section 4 by the urging force of the coil spring 10. The inclined surface 12 is for automatically returning the swinging operation knob 5.
[0008]
A plurality of terminals 13 connected to an electric circuit (not shown) are inserted in the upper wall of the switch body 1. The terminal 13 is bent at a right angle and protrudes into the switch body 1. In addition, a positioning fitting protrusion 14 is formed on the lower surface of the section 4.
[0009]
The switch unit 21 is a slide switch in which the movable contact held by the contact holder 23 in the switch case 22 is switched by sliding on the fixed contact. A long hole 24 for operation is formed in the upper surface of the switch case 22. In addition, a plurality of terminals 25 connected to the fixed contacts protrude in a horizontal row on the side surface. Each terminal 25 has an insertion hole 26 through which the terminal 13 is inserted. A positioning projection 28 provided with a fitting hole 27 is formed on the other side surface.
[0010]
The switch unit 21 is inserted from the lower surface of the switch body 1, and the fitting projection 14 is press-fitted into the positioning fitting hole 27 to perform positioning with respect to the switch body 1. At the same time, the lower end of the operation arm 8 provided on the operation knob 5 is engaged with the engagement hole 23 a of the contact holder 23 from the long hole 24, and the lower end portion of the terminal 13 is inserted into the insertion hole 26 of each terminal 25. Then, each terminal 25 and the terminal 13 are joined by soldering or the like. The switch unit 21 is fixed at a predetermined position by this joining and press-fitting of the fitting protrusion 14 into the fitting hole 27.
[0011]
In the switch device, when the operation knob 5 swings, the contact holder 23 engaged with the operation arm 8 slides in the switch case 22 to switch the contact. At this time, the pusher 11 inserted in the cylindrical portion 9 moves up the slope 12 of the section 4 and retracts into the cylindrical portion 9 against the urging force of the coil spring 10. When the hand is released from the operation knob 5, the pusher 11 descends the inclined surface 12 by the biasing force of the coil spring 10, and the operation knob 5 automatically returns to the neutral position.
[0012]
As described above, the positioning of the switch unit 21 with respect to the switch body 1 is performed directly by press-fitting the fitting protrusion 14 into the fitting hole 27 for positioning. Therefore, variation in positioning can be suppressed by managing the dimensions of the fitting hole 27 and the fitting protrusion 14. Then, by managing the variation of the switching point of the contact of the switch unit 21 itself, the variation of the contact switching angle of the operation knob 5 can be reduced. For this reason, there is no problem that the contact cannot be switched unless the operation knob 5 is operated largely, or that the contact is switched only by a slight operation.
[0013]
In addition, by joining the joint structure provided between the plurality of terminals 25 protruding from the switch unit 21 and the plurality of terminals 13 inserted in the switch body 1, the switch body 1 can be switched to the switch body 1 without using a printed circuit board. Since the unit 21 is fixed, the positional relationship between the printed wiring board and the switch unit and between the printed wiring board and the switch body varies as in the conventional structure in which the switch unit is attached to the switch body via the printed wiring board. Therefore, it is possible to reduce the manufacturing cost.
[0014]
In the embodiment described above, the positioning projection 14 is provided on the switch body 1 and the fitting hole 27 is provided on the switch unit 21, but the fitting hole is fitted on the switch body 1 and the switch unit 21 is fitted. The fitting structure which provides a joint protrusion may be sufficient.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of the switch device taken along line AA in FIG.
FIG. 2 is a sectional view taken along line BB in FIG.
FIG. 3 is a perspective view of main components.
FIG. 4 is a cross-sectional view showing a conventional example.
[Explanation of symbols]
1 ... Switch body 5 ... Control knob 7, 7 ... Oscillation center axis
13 ... Terminal 14 ... Mating protrusion 21 ... Switch unit
25 ... terminal 27 ... fitting hole 28 ... protrusion

Claims (1)

In a switch device that supports an operation knob on a swing center axis provided on a switch body, and operates and switches a switch unit with the operation knob.
A fitting structure that fits in a male-female relationship between the switch unit and the switch body, and a joint structure between a plurality of terminals protruding from the switch unit and a plurality of terminals inserted into the switch body. provided by the joining of the fitting and the junction structure of the fitting structure, the switch device characterized by positioning and fixing the switch unit to the switch body.

Images