JPH0320984Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a push switch.

Some push switches that are opened and closed by pressing a push button have a movable contact that also serves as a return spring for the push button.

FIG. 1 shows a conventionally known push switch of this type. In the figure, 1 is a switch case, 2 is a push button that moves up and down guided by the switch case 1, and 3 is a button that moves the push button 2 up and down. It is a contact mechanism that is opened and closed by the The contact mechanism 3
is a pair of terminals 4, 4 fixed to the case bottom plate 1a of the switch case 1 and the case bottom plate 1a.
Movable contact member 5 made of conductive rubber installed on top
When the push button 2 is pressed down, the movable contact member 5 is elastically deformed downward and comes into contact with the contact portions 4a, 4a of the both terminals 4, 4, and the movable contact member 5 is configured to It is designed to cause a short circuit. Furthermore, the movable contact member 5 also serves as a return spring that raises the push button 2, and when the pressing force of the push button 2 is released, the push button 2 returns to the upward position due to the repulsive force of the movable contact member 5, and the movable contact member 5 is restored to its original state and the terminals 4, 4 are opened.

However, the conventional push switch described above has the advantage that there is no need to provide a separate return spring because the movable contact member 5 also serves as a return spring for the push button 2; Since the push button 2 only gradually deforms elastically as it bends, the pressing sensation of the push button 2 does not have a sense of moderation called a click action. Therefore, in order to provide a click action function to a conventional push switch, the switch case 1 At the beginning of pressing the push button 2, the sliding part between the push button 2 and the push button 2
It was necessary to provide a click-action mechanism that resists the push button 2 and suddenly loses its resistance when the push button 2 is pushed down to a certain extent. In addition, as this kind of push switch,
Some use a diaphragm-shaped contact plate made of a leaf spring that also serves as a return spring as a movable contact member, but this type of push switch also requires a separate click-action mechanism in order to have a click-action function. It is.

This invention was made in view of the above-mentioned circumstances, and its purpose is not only to make the movable contact double as a return spring for the push button, but also to use the movable contact to release the push button. To provide a push switch capable of giving a click action to a pressing operation.

An embodiment of this invention will be described below with reference to the drawings.

2 to 6, reference numeral 11 is a synthetic resin switch case, 12 is a synthetic resin push button that moves up and down guided by the switch case 11, and the switch case 11 is shown in FIG. As shown in FIG. 1, there is a case bottom plate 11a having a substantially square outer shape and a substantially square opening in the center, and a rectangular cylindrical inner circumferential wall 11b and an outer circumferential wall 11c standing upright on the inner and outer peripheries of this case bottom plate 11a. It consists of Further, the push button 12 is connected to the outer peripheral wall 1 of the switch case 11, as shown in FIG.
A top plate 12a having a size that fits inside the top plate 1c and having a substantially square outer shape and a substantially square opening in the center.
and a rectangular cylindrical peripheral wall 12b hanging downward from the inner peripheral edge of the top plate 12a, and the peripheral wall 12b is slidably fitted inside the inner peripheral wall 11b of the switch case 11. has been done. On the other hand, in FIG. 3, reference numerals 13 and 13 indicate two sets of contact mechanisms provided between the inner and outer peripheral walls 11b and 11c of the switch case 11.
3 and 13 are two first terminals 1 provided at two opposing corners of the case bottom plate 11a.
4, 14, a second terminal 15 located near the other corner and provided on the side of the case bottom plate 11a, and both ends of which are locked to the first terminals 14, 14 so that the center part is connected to the case. The conductive spring bar 16 is provided so as to float above the bottom plate 11a. The first terminals 14, 14 are shared by two sets of contact mechanisms 13, 13,
As shown in FIGS. 9 and 10, the terminals 14, 14 have a horizontal plate portion 14a supported on the case bottom plate 11a at the upper end thereof, and spring rods are engaged on both sides of the horizontal plate portion 14a. It is said that the pieces 14b, 14b are cut and formed. Further, as shown in FIG. 7, the spring bar 16 is bent at a substantially right angle in the middle part, and both ends thereof are bent at a right angle. The portions are the first terminals 14, 14, respectively.
horizontal plate parts 14a, 14a and spring bar locking piece 14
b, 14b, the first terminal 1
4 and 14 so as to be rotatable. Furthermore, at the two opposing corners of the push button 12,
Vertical walls 17, 17 extending radially from the outer surface of the peripheral wall 12b over the entire width of the top plate 12a are integrally formed, and the vertical walls 17, 17 have a spring bar locking groove 18 that opens at the lower edge thereof. It is formed.
Note that the vertical walls 17, 17 are connected to the switch case 1.
A vertically long notch 19,1 formed in the inner circumferential wall 11b of 1
It is inserted into the switch case 11 from 9,
Further, relief grooves 20, 20 are formed on the upper surface of the case bottom plate 11a, into which the lower ends of the vertical walls 17, 17 enter when the push button 12 is pressed down. The spring bar locking groove 18 is for locking the middle part of the spring bar 16.
is located inside the intermediate position of the spring bar 16 (when the switch is turned It is located at a position offset to the center of the The spring bar 16 is locked to the push button 12 at the middle by inserting the middle part into the spring bar locking groove 18 with the middle part rotated upward. As a result, the linear portion between both ends and the middle portion of the spring bar 16 is inclined diagonally upward from the first terminal locking end (spring bar both ends) toward the push button locking end (spring bar middle portion). It is in a state of Also, 2
1 is a stopper formed on the push button 12 to define the return limit; 22 is a stopper receiver formed on the upper edge of the outer peripheral wall 11c of the switch case 11; In the received state, it is supported from below by the spring bars 16, 16. Note that the spring bars 16, 16 are connected to the first terminals 14, 1 in a state where a slight axial compressive force is applied to the straight portions of the spring bars 16, 16 to the extent that the spring bars 16, 16 do not bend or deform.
4 and the push button 12, and the push button 12 moves vertically up and down guided by the inner circumferential wall 11b of the switch case 11. The push button 12 is supported by the tension of the linear portions of the spring bars 16, 16. There is.

When the push button 12 is pressed down, the spring bar 16 rotates downward around the lower end (first terminal locking end) of the linear portion due to the pressing force of the push button 12; The top end is push button 12
Since the spring bar 16 tends to fall vertically because it is locked to the spring bar 16, the linear portion of the spring bar 16 is compressed in the axial direction as shown by the chain arrow in FIG. 11 as the push button 12 is pressed down. In the initial stage of pressing down the push button 12, the linear portion of the spring bar 16 resists the axial compressive force and maintains a straight state, so that the tension of this linear portion resists the pressing down of the push button 12. Although it acts as a force, push button 12
is further pushed down and the axial compressive force applied to the linear portion increases to a certain extent, the linear portion cannot withstand the axial compressive force and is deformed. When the linear portion is deflected and deformed in this way, the tensile force of the linear portion decreases rapidly, so that the push button 12 is pressed against the straight line of the spring bar 16 due to the sudden decrease in resistance to the push-down force. The shaped portion is momentarily pressed down until it comes into contact with the contact portion of the second terminal 15. FIG. 12 shows the state at this time. Further, when the pressing force of the push button 12 is released, the linear portion of the spring bar 16 is restored from the deflected and deformed state to the linear state and rotates upward about the first terminal locking end, and the second terminal 15, the push button 12 is returned to its original position. Note that the straight portion of the spring bar 16 that bends and deforms as the push button 12 is pressed down has the greatest amount of deformation near its center, and the direction of deformation is not constant (it may bend in the vertical direction or in the horizontal direction). Therefore, in this embodiment, the contact portion 15a of the second terminal 15 is positioned opposite to the push button locking end of the linear portion as much as possible, so that the linear portion is deflected in any direction. It is also ensured that the contact portion 15a comes into contact with the contact portion 15a. Also,
The contact portion 15a of the second terminal 15 is located at a higher position than the spring bar locking position of the first terminal 14,
The straight part of the spring bar 16 which has been deflected and deformed is received at a position higher than its lower end (first terminal locking end),
This straight portion is always restored upward.

On the other hand, in FIG. 4, A indicates the inner peripheral wall 11b of the switch case 11 and the peripheral wall 12b of the push button 12.
B is a translucent cover plate glued to the upper surface of the push button 12, and 10 is a light emitting diode housed in the component storage space A. The light emitting diode 10 is provided to illuminate the translucent cover plate B from inside the switch, and the light emitting diode 10 illuminates the circuit board etc. by fixing its lead wires 10a, 10a to the circuit board etc. is supported by In the push switch of this embodiment, a component storage space A is provided in the center of the switch case 11 and the push button 12, and the light emitting diode 1 is provided inside this space A.
0, the light emitting diode 10 can be easily incorporated into the switch by simply inserting it into the component housing space A. Further, the component housing space A includes a light emitting diode 10
In addition, it can also be used to accommodate another push switch, for example, and when another push switch is accommodated in the component storage space A, the cover plate B is not attached to the top surface of the push button 12 and the push button 12 is
The operation part (push button) of the push switch accommodated in the component accommodation recess A may be made to protrude from the opening.

Figures 13 and 14 show other embodiments of this invention, in which 11 is a switch case;
2 is a push button that is guided by the switch case 11 and moves up and down vertically; 14 is a first terminal provided on one end side of the case bottom plate 11a; and 15 is a second terminal provided on the other end side of the case bottom plate 11a. , 16 is a conductive linear spring bar, and one end of this spring bar 16 is held between a horizontal plate portion 14a formed at the upper end of the first terminal 14 and a spring bar locking piece 14b. is locked to the first terminal 14, and the spring bar 1
The other end of the spring bar 6 is locked in a spring bar locking groove 18 formed in the push button 12.

In this embodiment as well, the spring rod 16, which is provided diagonally upward on the case bottom plate 11a and whose lower end is locked to the first terminal 14 and whose upper end is locked to the push button 12, is connected to the push button. 1
When the push button 2 is pressed down to a certain extent, the spring bar 16 is bent and deformed and loses its resistance to the push button 12 being pushed down.
The movable contact and the push button 12 that move toward and away from each other function not only as a return spring but also to provide a click action when the push button 12 is pressed.

The push switch of this invention is as mentioned above.
The movable contact is a spring rod with a straight line between the lower end and the upper end, and by compressing this spring rod in the axial direction as the push button is pressed down and deforming the spring rod, the tension of the spring rod can be reduced. Since it is designed to rapidly reduce the size of the push button to obtain a click action, the movable contact not only serves as a return spring for the push button, but also uses the movable contact to generate a click action when the push button is pressed. can give.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional front view showing a conventional push switch. Figures 2 to 11 show an embodiment of this invention, with Figure 2 being a perspective view showing the external appearance, Figure 3 being a partially cutaway plan view, and Figure 4 being taken along the - line in Figure 3. 5 is a sectional view taken along - of FIG.
6 is a sectional view taken along the - line in FIG. 3, FIG. 7 is a plan view with the push button removed, FIG. 8 is a bottom view of the push button, and FIGS. 9 and 10. 11 and 12 are a front view and a side view of the first terminal, and FIGS. 11 and 12 are cross-sectional views of the same part as FIG. FIGS. 13 and 14 are a partially cutaway plan view and a longitudinal sectional front view showing another embodiment of this invention. 11...Switch case, 12...Push button, 14
...First terminal, 14b... Spring bar locking piece, 15...
...Second terminal, 16...Spring bar, 18...Spring bar locking groove.

Claims (1)

[Scope of utility model registration request] a switch case, a push button that moves up and down guided by the switch case, at least a pair of terminals provided on the case bottom plate of the switch case, and a spring bar lock formed on one terminal of the pair of terminals. a conductive spring bar that is provided diagonally upward on the case bottom plate with a lower end held by a piece, and that rotates downward about the lower end and contacts the other terminal when the push button is pressed down; The rod has a straight line between its lower end and its upper end, and the upper end of the spring rod is attached to the push button. A push switch characterized in that a rod is locked in a spring rod locking groove that compresses the rod in its axial direction, and the spring rod, which rotates downward when the push button is pressed down, is deflected and deformed by the axial compression force.