JPH066429Y2 - Illuminated pushbutton switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an illuminated pushbutton switch for use inside and outside an elevator, for example.

[Prior Art] Conventionally, an illuminated pushbutton switch of this type has a printed wiring board having a circuit pattern printed thereon as shown in FIG. 12, for example.
The neon lamps (2) and (2), the switch (3) and the switch housing (4) are provided on the (1), and the switch housing (4) is
An actuator (6) that can move up and down and is biased upward by a spring (5) is provided.
Press the key top (7) fixed on the upper part of the switch to bring the movable contact in the switch (3) into contact with the fixed contact,
When the circuit was closed, the neon lamps (2) and (2) were turned on to indicate that the circuit was closed. Reference numeral (8) is a phase plate of the control panel, and the phase plate (8) is provided with a through hole (9) for projecting the key top (7).

[Problems to be Solved by the Invention] However, in the conventional example shown in FIG.
Since (7) was fixed to the actuator (6), if the center axis of the key top (7) deviates from the center axis of the through hole (9) of the phase plate (8) during assembly, the key top
There is a problem in that the (7) cannot be projected into the through hole (9), and the alignment work at the time of assembly is troublesome.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an illuminated push button switch that facilitates the alignment work when the control panel is mounted on a phase plate or the like.

[Means for Solving the Problems] According to the present invention, by pressing a key top, a movable contact is brought into contact with a fixed contact, the circuit is closed, and a light emitting element on a printed wiring board is turned on to close the circuit. In the illuminated pushbutton switch configured to display, a lower FPC having the fixed contact printed on the upper surface, a spacer, an upper FPC having the movable contact printed on the lower surface, and a frame are laminated and fixed on the printed wiring board. An actuating plate that can be moved up and down via a spring is provided on the upper surface of the frame, an engaging groove is formed in the actuating plate, and a lower surface of the key top is engaged with the engaging groove of the actuating plate and is horizontal. It is characterized in that an engaging element movable in the direction is provided in a protruding manner.

[Operation] Since the engaging element projecting from the lower surface of the key top is engaged with the engaging groove of the operating plate so as to be movable in the horizontal direction, the central axis of the key top during assembly is the phase plate of the control panel. Even if the key top is deviated from the central axis of the through hole, the key top can be moved in the horizontal direction so that the central axis is aligned with the central axis of the through hole and the key top is projected.

[Embodiment] FIGS. 1 to 11 show an embodiment of the present invention. 1 to 3, (11) is a printed wiring board made of a substrate made of glass epoxy resin, and the printed wiring board (11) has screw holes (12) to (12) and mounting holes. (13) to (13) are punched, and further, on the upper surface thereof, a circuit pattern (not shown), a group of terminals for external circuit connection (18), and a group of terminals for other connections are printed. The surface excluding the group is covered with a protective film. On the upper surface of the printed wiring board (11), as shown in FIG.
FPC connector (19) for connecting C (30) (50) to the circuit pattern, LED chips (20) to (20) as light emitting elements,
(20) to (20) and resistors (21) to (21) for protecting the LED are fixed by reflow soldering or the like. The LED chip (20) ~
(20), (20) to (20) are L for G (green) emission, for example.
It is composed of a pair of ED and R (red) light emitting LED.

An adhesive sheet (24) having LED window holes (22), (22) and screw holes (23) to (23) formed on the upper surface of the printed wiring board (11) as shown in FIG. , A lower FPC (30) having fixed contacts (33) to (33) and a circuit pattern (34) printed on the upper surface, window holes (41) (41) for LED, through holes (42) to (42) and Screw hole (43) ~
Spacer (40) with perforated (43), movable contacts (53) to (5
3) and the upper FPC (50) on which the circuit pattern (54) is marked are laminated and fixed. The lower FPC (30), the upper FPC
The (50) is formed by, for example, folding one transparent FPC with a folding line along a long hole for folding. The fixed contacts (33) to (33), the movable contacts (53) to (53), the circuit pattern (3
4) and (54) are formed, for example, by first printing a silver paste on a polyester film and then printing a carbon paste. The fixed contacts (33) to (33) and the movable contacts (53) to (53) are the window holes (31) (31), (51) (51) for the LED.
Are equidistant from the center and are located on the radiation that is divided into four equal central angles.

As shown in FIG. 1, (60) and (60) are short square box-shaped frames with an open upper surface. These frames (60), (60)
Window holes (61) and (61) for LEDs are formed in the central portion of the bottom plate, and screw holes (62) to (62) and (62) to (62) are formed in the four corners. Window frames (63) and (63) are provided on the peripheral portions of the window holes (61) and (61) so as to project toward the upper opening. The frame (6
The movable contacts (5) of the upper FPC (50) are attached to the bottom plates of (0) and (60).
3) ~ (53), 4 through holes (6) located above (53) ~ (53)
4) to (64), (64) to (64) and these through holes (64) to (64),
(64)-(64) intermediate portion, four distances from the center of the window holes (61), (61) are equal, and four spring members located on the radiation that divides the central angle into four equal parts. Groove (65) ~ (65), (65)
~ (65) are formed. Engagement holes (66), (66), (66), (66) are formed in the side plates of the frames (60), (60) facing each other. As shown in FIG. 1 and FIG. 4, the frames (60) and (60) are arranged from the lower surface of the printed wiring board (11) to the adhesive sheet (24), the lower FPC (30), the spacer (40), Screw holes (12) to (12), (23) to (23), (32) to (32), (43) to (43) of the upper FPC (50) and the frame (60) and (60) respectively. ,
Screws (25) to (25), (2) that pass through (52) to (52), (62) to (62)
It is fixed to the upper surface of the upper FPC (50) by tightening nuts (26) to (26) and (26) to (26) on 5) to (25).

On the upper portions of the frames (60) and (60), operating plates (70) and (70) having window holes (71) and (71) for LEDs in the center are fitted so as to be vertically movable. Has been done. That is, the operating plate (70),
As shown in FIGS. 1 and 5, the opposite side portions of (70) are provided with engaging holes (66) (6) of the frames (60), (60).
6), (66) (66) engages vertically movable engaging elements (72) (72),
(72) (72) is formed. As shown in FIGS. 1, 5 and 6, through holes (64) to (64) of the frames (60) and (60) are formed on the lower surfaces of the operating plates (70) and (70). , (64) ~ (64)
And the spring engaging grooves (65) to (65) and (65) to (65), respectively, and engage the upper parts of the pressers (83) to (83) and (83) to (83). Engaging groove (73) to (73), (73) to (73) and spring
Spring engaging grooves (74) to (74) and (74) to (74) for engaging the upper portions of (84) to (84) and (84) to (84) are formed. Further, on the lower surfaces of the operating plates (70) and (70), the frame (6
Protrusions (75) for holding an on-stroke 1 (for example, 0.8 mm) as shown in FIG. 6 between the bottom plate upper surface of (0) and (60).
To (75) and (75) to (75) are formed. Further, as shown in FIG. 7, the contact portion between the lower FPC (30) and the upper FPC (50) includes a fixed contact (33) and a movable contact (53) which are spacers (40).
The circular circuit pattern (34a) faces each other through the through hole (42) of
And (54a) are in contact with both surfaces of the spacer (40).

On the other side of the operating plates (70), (70) facing each other, the first
As shown in the figure, the engaging tongues (77) (77), (77) (77) and the engaging groove
(78) (78) and (78) (78) are formed. The operating plate (7
0), the upper surface of (70), through the disk-shaped character plate (80), (80) consisting of a milky white diffusion plate, the key top (90), (90)
Is provided. The character plates (80), (80) are formed with notches (81), (81), (81), (81) for alignment. The pressers (83) to (83) and (83) to (83) are provided with a cone-shaped cushion portion (86) on the upper surface of the cylindrical body (85) as shown in FIGS. 1 and 6. The ring body (87) is connected to form a shape, and the ventilation groove (88) is formed on the top of the ring body (87).
(88) is formed.

As shown in FIG. 1, the key tops (90) and (90) have frame portions (91) and (91) and concave lens shapes fitted in the frame portions (91) and (91). It consists of transparent parts (92) and (92).
The centers of (92) and (92) are the window holes of the operating plates (70) and (70).
It is formed so as to be located above the center of (71) and (71). As shown in FIGS. 8 and 9, the operating plate (7) is provided on the lower surface of the frame portions (91), (91) of the key tops (90), (90).
0), (70) engaging tongues (77) (77), (77) (77) and engaging groove (7)
8) (78), engaging with (78) (78), and in the horizontal plane, in the horizontal direction indicated by arrow M, distances m ₁ and m ₂ (for example, m ₁ = m ₂ = 1 mm)
Engagers (93), (93), (93), (93) that can move and can move in the front-rear direction indicated by arrow N by distances n ₁ and n ₂ (for example, n ₁ = n ₂ = 1 mm) Is projected.

Next, the operation of the above embodiment will be described with reference to FIGS. 10 and 11. When pressing the center of the pressing surface of one of the two key tops (90) (90),
The actuating plate (70) shown in FIG. 5 moves downward against the springs (84) to (84), and the four pressing elements (83) to (83) shown in FIGS. 6 and 7 are shown. Fix the movable contact (53) to (53) to the fixed contact (33) to
Contact (33). At this time, the operating plate (7
Before the protrusions (75) to (75) of (0) contact the upper surface of the bottom plate of the frame (60), the movable contacts (53) to (53) contact the fixed contacts (33) to (33). After contact, the protrusions (75) to (75) are the frame (60).
The deformation until the contact with the upper surface of the bottom plate is absorbed by the deformation of the cushion portions (86) to (86) of the pressing elements (83) to (83), and a stable on-stroke 1 is obtained, and after the contact. The key top (90) can withstand a sufficient load (eg 60 kg weight).

Movable contact that corresponds by pressing one key top (90)
When the circuits (53) to (53) come into contact with the fixed contacts (33) to (33) to close the circuit, the corresponding terminals (for example, from the terminal group (18) for external circuit connection shown in FIG. 2 (for example, 18a to 18c) The connected external circuit is activated, and the corresponding terminals of the terminal group (18) (for example,
LED drive voltage is applied to the corresponding LED chips (20) to (20) via (18d to 18h).
Lights 0) to indicate that the circuit is closed.

When pressing the peripheral part (or corner part) instead of the center part of the pressing surface of one key top (90), the actuating plate (70) moves downward against the springs (84) to (84). Move and presser (83) ~
(83) is a fixed contact for at least one of the movable contacts (53) to (53)
(33) to (33) are brought into contact with the corresponding contacts, the circuit is closed in the same manner as described above, and the corresponding LED chips (20) to
(20) lights up to indicate that the circuit is closed. At this time, four movable contacts (53) to (53), fixed contacts (33) to (33),
The pushers (83) to (83) and the springs (84) to (84) are located at the lower part on the radiation where the distance from the center of the pressing surface of the key top (90) is equal and the central angle is divided into four equal parts. Since this is provided, the on-stroke is almost the same as when the central portion of the pressing surface of the key top (90) is pressed, and a stable on-stroke 1 is obtained. When the other key top (90) of the two key tops (90) (90) is pressed, the same operation as when pressing the one key top (90) is performed.

Next, as shown in FIGS. 10 and 11, a case where the illuminated push button switch (100) is attached to the control panel will be described. Printed wiring board (1) for illuminated pushbutton switch (100)
1) is fixed to the mounting plate (131) in the control panel, and its key top
When projecting (90) into the through hole (133) of the phase plate (132), as shown in Fig. 10, the central axis (9
5) and the central axis (135) of the through hole (133) do not match and the through hole (13
If it does not fit in 3), move the key top (90) in the R direction, align the central axis (95) with the central axis (135) of the through hole (133), and project it as shown in FIG. 11. . At this time, the moving direction R of the central axis (95) of the key top (90) is the M direction or the N direction in FIGS. 8 and 9 or a combined direction thereof corresponding to the center shift direction.

In the above embodiment, the two illuminated push-button switches having two key tops have been described, but the present invention is not limited to this, and one key top or three or more key tops are provided on one printed wiring board. It can also be used for an illuminated pushbutton switch having a key top.

[Effects of the Invention] The illuminated pushbutton switch according to the present invention, as described above,
Since the key top can be moved horizontally with respect to the operating plate, the key top can be installed even when the center axis of the key top deviates from the center axis of the through hole of the phase plate when it is mounted on a control panel, etc. The top can be aligned with the through hole simply by moving it horizontally. Therefore, the work of assembling the control panel or the like becomes extremely easy.

[Brief description of drawings]

1 to 11 show an embodiment of the present invention. FIG. 1 is an exploded perspective view showing a main part, FIG. 2 is a plan view showing a completed state, and FIG. 3 is FIG. FIG. 4 is a sectional view showing a fixed portion in which the thickness is exaggerated and displayed, FIG. 5 is an enlarged partial sectional view taken along the line AA in FIG. 2, and FIG. 6 is a sectional view taken along the line B- in FIG.
FIG. 7 is an enlarged partial sectional view taken along line B, FIG. 7 is an enlarged partial sectional view taken along line CC of FIG. 2, and FIGS. 8 and 9 are enlarged views showing engagement between the key top and the operating plate. FIG. 9 is a sectional view taken along the line EE of FIG. 9, FIG. 9 is a sectional view taken along the line DD of FIG.
FIG. 11 is a side view with a partial cross section showing a state before and after assembling an illumination push button switch to a control panel, and FIG. 12 is a cross sectional view showing a conventional example. (11) …… Printed wiring board, (20) …… LED chip (light emitting element), (30) …… Lower FPC, (33) …… Fixed contact, (40)
…… Spacer, (42) …… Through hole, (50) …… Upper FPC,
(53) …… Movable contact, (60) …… Frame, (70) …… Operating plate, (78) …… Engagement groove, (83) …… Pressing element, (84) …… Spring, (90) ...... Key top, (93) ...... engager, (100) ...
… Illuminated pushbutton switch, (132) …… Phase plate, (133) …… Through hole.

Claims (1)

[Scope of utility model registration request] 1. An illuminated push button adapted to bring a movable contact into contact with a fixed contact by pressing a key top to close the circuit and light a light emitting element on a printed wiring board to indicate that the circuit is closed. In the switch, a lower FPC having the fixed contact printed on the upper surface, a spacer, an upper FPC having the movable contact printed on the lower surface, and a frame are laminated and fixed on the printed wiring board, and a spring is interposed on the upper surface of the frame. And an engaging plate is provided on the lower surface of the key top, and an engaging member that engages with the engaging groove of the operating plate and is movable in the horizontal direction is provided. Illuminated pushbutton switch characterized by being projected.