JPH0429453Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a printed board for a switch provided in a switch case.

(Problems with providing contacts and circuit network on one printed board) In order to configure the circuit inside the switch case and install the switch indicator lamp etc. in the case, for example, fixed contacts and placement of circuit components,
When attempting to install the circuit network shown in Figure 4 on a single small-area printed board, a third
The fixed contacts and circuit components shown in the figure must be exposed and arranged, and the circuit network shown in FIG. 4 must be placed on the back side of the printed board, or vice versa, in order to control the fixed contacts on and off using the movable contacts. However, since the movable contacts are usually provided on the front surface of the printed board, the fixed contacts and circuit components are placed on the front side of the printed board, and the circuit wires are placed on the back side.

However, in that case, if a connection part between a fixed contact provided on the front surface of the printed board and an external terminal, or a connection part made by soldering a circuit part and a circuit cable is provided on the back side of the printed board, the circuit network must be connected to the back side of the printed board. Not only is it difficult to place the circuit network itself, but even if it were possible, the circuit network would have to be placed around the planned connection areas as described above. , since the printed board must have a large area, the switch has to be large.

For this reason, in the case of a switch that must be installed in an extremely limited space, such as in an automobile, which requires a small size, the large printed circuit board makes the switch itself large, which is a fatal drawback. become.

(Purpose of the invention) The object of the present invention is to eliminate the above-mentioned drawbacks and provide a switch for the above-mentioned specific application with a structure that can be installed in a limited space.

(Structure of the invention) The invention meets the above-mentioned purpose. Specifically, the back side of a printed board with printed wiring on the back side is placed on an insulating board that has fixed contact studs inserted and caulked. The fixed contact studs are exposed through the through holes made in the printed board, one end of the elastic conductive plate is clamped to the required fixed contact stud, and the elastic contact parts of these conductive plates are connected to the printed wiring. A printed circuit board for a switch, characterized in that a contact holder is arranged to move on the surface of the printed circuit board, and a contact holder is attached with a movable contact that presses against the required part of the contact stud and controls contact and separation with a fixed contact stud. By reducing the size of the switch by making the board smaller, there is an inventive step in that the switch can be easily installed in a limited space.

(Example) An example of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates an insulating board, and the upper printed board 2 is placed face down. The printed board 2 is provided with printed wirings 14 _-1 to 14 _-4 , which will be described later, on the back side.
The printed board 2 and the insulating board 1 are fixed to the bottom of the switch case 3. The switch case 3 is provided with an opening 4 on the upper surface, a pair of low wall plates 5, 5 are provided on the left and right inner sides of the middle tier, protruding in corresponding directions, and a chevron-shaped middle partition plate 6 is provided between both wall plates 5, 5. The partition plate 6 is provided with through holes 7, 7 between the wall plates 5, 5, and a window hole 8 elongated from side to side is provided in the center of the bottom of the partition 6 (Fig. 2). , blind holes 9, 9 with open bottom surfaces as shown in FIG. 2 are provided in front and behind the window hole 8, and a hood 10 surrounding the through holes 7,
form 10.

The insulating plate 1 is provided with supporting posts 11, 11 that penetrate the printed board 2 somewhat loosely and whose upper ends reach the through holes 7, 7, or are attached separately.

As shown in Figures 1 and 5, the insulating plate 1 is provided with fixed contact studs a _-1 , a _-2 , b _-2 , b _-2 , c _-1 , c _-2 , c ₃ in three rows, and printed. As shown in FIGS. 1, 3, and 4, the plate 2 has a plurality of through holes 12 through which the heads of the respective fixed contact studs are loosely passed and exposed on the upper surface, and play holes 13, 13 through which the supports 11, 11 are passed. As shown in FIG. 4, printed wiring 14 _-1 is connected between the side of the through hole 12 corresponding to the fixed contact stud a _-1 and the connection point d _-1 on the right side, as shown in FIG. A printed wiring 14 -2 is connected between the side of the through hole 12 corresponding to the stud b _-1 and the side of the right side free hole 13, and the printed wiring 14 _-2 is connected to the side of the through hole 12 corresponding to the fixed contact stud c _-2 . The printed wiring 14 _-3 is connected between the left side and the left side of the play hole 13, and each of the left and right play holes 1
Printed wiring 14 _-4 is provided between the sides of 3 and 13 and between the connection point d _-2 on the right side, and the printed wiring 14
_-1 , _14-2 , _14-3 , and _14-4 constitute a circuit network. Further, concave surfaces 15 are provided on the upper surface of the insulating plate 1 on the sides of the fixed contact studs a _-1 , b _-1 , b _-2 , and a sixth concave surface is provided on the lower surface of the head of each of these fixed contact studs and on the upper surface of the insulating plate 1 . ，
Elastic conductive plates 16 _-1 , 16 clarified in Figure 7
_-2 , _16-3 are fixed by sandwiching the respective base rings 17, and each elastic part 18 of the elastic conductive plate is fitted into the recessed surface 15, and then the printed wiring _14-1 , 2 is printed.
14 _-2 and 14 _-3 respectively. Also, printed wiring 14 _-3 , 14 _-4 is installed in the free holes 13 on both sides of Fig. 4.
Two lead wires 19 and 20 respectively brazed to
Then, the two lead wires 21 and 22 brazed to the printed wirings 14 _-2 and 14 _-4 , respectively, are passed through the holes as shown in FIG. , 20, and a red light emitting diode D _-1 is connected between the upper ends of the pillars 1 on the left side of Fig. 1.
A light-emitting diode D _-2 with a border color is connected between _the lead wires 21 and ₂₂ on the top surface of the printed board 2, and a resistor 23 (no. 3)).

25 is connected to the opening 4 of the case 3 by the shaft 24.
A switch knob that swings between the off position and the left and right on positions as shown in the figure, 26 is a movable contact point 2 corresponding to the rows of fixed contact studs a _-1 and a _-2 described above.
7 and rows of fixed contact studs b _-1 and b _-2 and fixed contact stud c _-1
The contact holder is equipped with movable contacts 28 (see FIG. 3) corresponding to the movable contacts in the rows of ~c _-3 on the lower surface, and the switch knob 25 is swingably passed through the window hole 8 of the partition plate 6. Provided at the bottom end.

A moderation valley 29 is provided on the upper surface of the holder 26, and an engaging ball 30 fitted together with a spring into the blind hole 9 is pressed against the moderation valley 29 (FIG. 2).

The printed board 2 is stacked on the insulating board 1 before being assembled to the case 3, and the supports 11, which protrude from the play holes 13,
The light emitting diodes D _-1 and D _-2 are stacked and fixed on the case 3, and the diodes are assembled and fixed on the case 3.
Insert D _-1 and D _-2 into the through holes 7 and 7 respectively as shown in Fig. 1 and surround them on three sides with hoods 10 and 10,
The light emitted from the diode is transmitted from the upper surface of each hood 10 to the lower surface of the switch knob 25. Lenses 31 and 32 corresponding to the diodes D _-1 and D _-2 are fitted onto the waveform upper surface of the switch knob 25, respectively.

The movable contact 27 is provided with contacts arranged in a straight line, and the movable contact 28 is provided with contacts arranged in a triangular arrangement (FIG. 3).

In the switch of this embodiment, the switch knob 2
5, the movable contacts 27 and 28 attached to the contact holder 26 slide on the top surface of the printed board 2, and the movable contacts of the movable contact 27 come into contact with the fixed contact studs a _-1 and a _-2 . At the same time, the movable contact of the movable contact 28 is fixed with the fixed contact stud b _-1 ,
Contact c _-1 and c _-2 . Therefore, from fixed contact stud c _-2 which is the power contact to fixed contact stud c _-1 which is the first load contact.
A current flows to drive the first load, and at the same time, from the fixed contact stud b _-1 to the elastic conductive plate 16 _-3 , printed wiring 14 _-3 , lead wire 19, light emitting diode D _-1 , lead wire 20, and printed wiring. 14 _-4 , resistor 23,
Current flows through the printed wiring _14-1 , the elastic conductive plate _16-1 , and the fixed contact stud a _-1 which is the ground contact, driving the red light emitting diode D _-1 on the left, and driving the first load through the lens on the left. 31. Also, when the right side of the switch knob 25 in FIG. 1 is pressed, the contact holder 26 moves to the left on the top surface of the printed board 2.
The movable contacts of the movable contacts 28 slide on the printed board 2 and come into contact with the fixed contact studs b _-2 , c _-2 , and C _-3 .
Therefore, current flows from the fixed contact stud C _-2 , which is the power supply contact, to the fixed contact stud C _-3 , which is the second load contact, to drive the second load, and at the same time, from the fixed contact stud B _-2 to the elastic conductive plate 16 _{- 2} , printed wiring 14 _-2 , lead wire 2
1. Light emitting diode D _-2 , lead wire 22, printed wiring 14 _-4 , resistor 23, printed wiring 14 _-
1. A current flows through the fixed contact stud a _-1, which is the ground contact, and drives the right edge-colored light emitting diode D _-2 , thereby indicating the drive of the second load to the right lens 32.

(Effects) The present invention has printed wiring 14 _-1 to 1 on the back side of the insulating plate which has fixed contact studs a _-1 to c _-3 inserted and caulked.
Printed wiring 14 _-1 can be completed simply by stacking and fixing the back sides of the printed boards 2 coated with 4 _-3 and exposing each of the fixed contact studs described above through the through holes 12 provided in the pin board 2.
~ _14-4 , clamp one end of the elastic conductive plates _16-1 to _16-3 to the required fixed contact studs, and connect the elastic contact portions 18 of those conductive plates to the printed wiring of the printed board. Movable contacts 27 and 28 that are pressed against required parts and whose contact and separation from the fixed contact studs are controlled.
Regarding the printed circuit board for the switch, in which the contact holder 26 with attached contact holder 26 is arranged to move on the printed circuit board 2, there are fixed contact studs a _-1 to c _-3 and external terminals on the back side of the printed board 2 on which printed wiring is applied. Or, since there is no plan or need to provide a connection part such as soldering between the circuit part and the circuit network, the printed wiring can be avoided in the planned part, and the switch can be made smaller because there is no need to use a large printed board. can. Also, one end of the elastic conductive plates _16-1 to _16-3 is sandwiched between the required fixed contact studs and the insulating plate, and the elastic contact portions of these conductive plates are pressed against the required parts of the printed wiring to form the printed wiring. Since the fixed contact studs are connected, electrical connections can be made between the required parts of the printed board and the required fixed contact studs without bulk, and the sliding movement of the movable contacts can be guided by the smooth surface of the printed board 2. There are other effects.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view of the central portion, FIG. 2 is a longitudinal sectional side view of the central portion,
3 is a plan view of an embodiment in which the insulating board 1 and the printed board 2 are stacked together, FIG. 4 is a back view of the printed board 2, and FIG.
6 is a partially enlarged vertical sectional view, and FIG. 7 is a perspective view of the elastic conductive plates 16 _-1 to 16 _-3 . 1... Insulating board, 2... Printed board, 3... Switch case, a _-1 , a -2 , b _-1 , b _-2 , c _-1 , c _{-2 ,} c _-3
... Fixed contact stud, 12 ... Through hole, 14 _-1 ~ 14 _-4
...Printed wiring, 16 _-1 to 16 _-3 ... Power conductive plate, 18 ... Elastic part.

Claims (1)

[Scope of utility model registration request] The back side of a printed board with printed wiring on the back side is overlapped and fixed on the insulating board into which fixed contact studs are inserted and caulked, and the fixed contact studs are exposed through a plurality of through holes provided in the printed board, One end of the elastic conductive plates is clamped to the required fixed contact studs, and the elastic contact portions of those conductive plates are pressed into contact with the required portions of the printed wiring on the printed board, and the contact and separation with the fixed contact studs is controlled. A printed board for a switch, characterized in that a contact holder with a movable contact attached thereto is arranged to move on the surface of the printed board.