JP3198717B2 - Push button switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button switch whose contacts are opened and closed by pressing a push button.

[0002]

2. Description of the Related Art A conventional push button switch is slidably fitted into a frame, and has a push button attached to a front end of a push rod for opening and closing a contact of a switch portion, and a screw portion provided on the push rod at a rear portion of the push button. Is screwed in, and the push button is attached to the push rod by rotating and tightening the push button with respect to the push rod. An operation display mark or an operation display character indicating an operation display or the like is written on the front surface of the push button.

[0003]

However, in the conventional push button switch, since the push button is attached to the push rod by screwing the screw portion of the push button into a screw portion provided on the push rod, the push button is pressed or screwed. There is a disadvantage that the push button is easily loosened by the turning operation. In addition, since the push button with the operation display mark on the front surface is rotated and attached to the push rod, there is a disadvantage that the operation display mark of the push button attached to the push rod cannot be located at an arbitrary position.

In view of the above, it is an object of the present invention to prevent the push button from being loosened during operation and to position the push button operation display mark at an arbitrary position with respect to the push rod. It is to provide a push button switch capable of performing the following.

[0005]

In order to solve the above-mentioned problems, a push-button switch according to the present invention is provided with a frame formed of a cylindrical body attached to an operation panel, and is disposed at a front end of the frame and operates on a front surface. a push button the display mark is described in the push button switch with a push rod for opening and closing the contacts of the switch unit to slide inside the frame by the pressing operation of the push button attached to the rear portion of the push button, the
The push rod has a hollow portion in which the illuminating portion is housed, and a substantially central portion of the push button is provided with a hole communicating with the hollow portion, and an engaging portion is provided which protrudes toward the push rod from an end surface of the hole. The push rod is formed so as to protrude toward the hole of the push button, and is formed on the inner surface of the engaging portion and the engaging portion which engages with the engaging portion of the push button.
Provided with a threaded portion, and an engaging portion of the push button is engaged with the push rod.
Screw engaged with the joint and coupled to the thread of the push rod
A cap having a part characterized by being adapted to hold the engagement state between the engaging portion of the engaging portion and the push rod of the push button Nde write fitted into the hole of the push button.

[0006]

In the above-described configuration, the push button having the operation display mark on the front surface is attached to the front end of the push rod in the frame attached to the panel by snap-fit engagement.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view of a push button switch showing one embodiment of the present invention, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. In the drawing, reference numeral 1 denotes a frame which is formed of a cylindrical body and is attached to an operation panel 2; 3 denotes a push rod which is slidably fitted into the frame 1; and the push rod 3 is disposed between the frame 1 and the push rod 3. A locking step 3d that engages with a lock member of the lock device described with reference to FIG. 5 is provided. The push rod 3 is prevented from coming off by the spring force of the coil spring 5 in the frame 1 so that the projecting portion 3b abuts on the contact portion 17 of the lock device disposed in the frame 1. Reference numeral 6 denotes an engaging portion projecting upward from the front end surface of the push rod 3, and two outwardly projecting projections 6a, 6a are formed at the tip of the engaging portion 6.

Reference numeral 7 denotes a push button provided at the front end of the frame 1. The push button 7 has a concave portion 8a, 8a on the rear surface thereof for engaging with the projections 6a, 6a of the engaging portion 6 of the push rod 3. Joint part 8, 8
2 is formed on the front surface of the push button 7 as shown in FIG.
The operation display mark 11 is described as shown in FIG. Reference numeral 7a denotes a hole formed in a substantially central portion of the push button 7 into which a cap 9 to be described later is fitted, and 9 denotes a screw portion inserted from the upper surface of the hole 7a and provided on the inner surface of the engaging portion 6 of the push rod 3. 3c
This is a detachable cap made of a transparent member having a screw portion 9c to be fitted into the cover and a projection 9b locked to the step portion 7b of the push button 7. Reference numeral 10 denotes a switch unit disposed at the rear end of the frame 1, the contact of which is opened and closed via the push rod 3 when the push button 7 is pressed.

The projections 6a, 6a of the engaging portion 6 projecting upward from the front end face of the push rod 3 are provided at opposing positions as shown in FIG. 3, and the recesses engage with the projections 6a, 6a. 8a, 8
a is formed at a position corresponding to the protrusions 6a, 6a of the engaging portions 8, 8 projecting downward from the rear surface of the push button 7. When the projections 6a, 6a of the push rod 3 are engaged with the concave parts 8a, 8a of the push button 7, both ends of the engaging parts 8, 8 having the concave parts 8a, 8a are locked by the locking parts 3d of the push rod 3. The push button 7 is attached to the push rod 3 so as to be interlocked therewith.

The operation of the push button switch is such that when the push button 7 is pressed, the contact of the switch section 10 is turned on (off) via the push rod 3 and the push rod 3 is turned on when the contact is turned on.
Are locked and locked by a lock device provided in the frame 1. When the push button 7 is twisted in the direction of the arrow of the operation display mark 11, the lock between the push rod 3 and the lock device is released, and the push button 7 returns to the original position via the push rod 3 by the spring force of the coil spring 5, The contact of the switch unit 10 is turned off (on).

In such a push button switch, the push button 7
In order to attach the push rod 3 to the push rod 3, first, the protrusions 6a, 6a of the engaging portion 6 projecting upward from the front end face of the push rod 3 slidably fitted in the frame 1, and projecting downward from the rear face of the push button 7 The projections 6a, 6a are fitted into the recesses 8a, 8a by snap-fitting the recesses 8a, 8a of the engaging portions 8, 8 (see FIG. 3). Then, a push button 7 is attached to the screw portion 3c formed in the engagement portion 6 of the push rod 3.
The push button 7 can be attached to the push rod 3 by inserting the cap 9 from the upper surface of the hole 7a and tightening the screw 9c of the cap 9 until the projection 9b of the cap 9 contacts the step 7b of the push button 7. By fastening the cap 9 to the push rod 3, the engaging portions 6 of the projections 6 a, 6 a fitted into the recesses 8 a, 8 a of the engaging portions 8, 8 of the push button 7 become the engaging portions 8, 8 of the push button 7. As a result, the projections 6a, 6a are firmly engaged with the recesses 8a, 8a. In attaching the push button 7 to the push rod 3 described above, the push button 7 having the operation display mark 11 on the front face is attached to the push rod 3 by fitting from the front face of the frame 1, so that the push button 7 is pressed or twisted. It is possible to prevent the push button 7 from being loosened by the operation, and the operation display mark 11
Can be located at an arbitrary position with respect to the operation panel 2. Also, a cap 9 is attached to the push rod 3 through the hole 7a of the push button 7.
By tightening, the engaging portion 6 of the push rod 3 and the engaging portions 8 of the push button 7 are firmly engaged, and it is possible to prevent the push button 7 from rattling.

In this embodiment, the projections 6a, 6a are provided on the engaging portion 6 of the push rod 3, and the concave portions 8a, 8a are provided on the engaging portions 8, 8 of the push button 7. A concave portion may be provided in the joint portion 6 and a protrusion may be provided in the engaging portion 8 of the push button 7. FIG. 4 is a sectional view of a main part showing an engaged state of a push button and a push rod according to another embodiment of the present invention. In the figure, the push rod 3 has projections 6a, 6a projecting upward from the front end face of the push rod 3.
Are provided, and the push buttons 7 having the recesses 8a, 8a engaged with the engagement portions 6 are rotated by 90 degrees, and the recesses 8a, 8a of the engagement portions 8, 8 are provided. An engaging portion 6 having another protrusion 6b, 6b engaging with 8a is provided. Thus, the engaging portion 6 having a plurality of protrusions on the push rod 3
Is provided, the engaging portions 8, 8 having the concave portions 8a, 8a of the push button 7 can be fitted into the engaging portions 6 having either one of the protrusions of the push rod 3, and the operation display mark is provided on the upper surface. The displayed push button 7 can be located at an arbitrary position.

FIG. 5 is a longitudinal sectional view of a push-button switch showing another embodiment of the present invention. In the figure, frame 1
A hollow portion 3a is formed in the axis of the push rod 3 inside, and a guide tube 12 to which the illuminating portion 4 is attached is disposed in the hollow portion 3a. 13 is the illuminating unit 4 provided on the guide tube 12
This is a contact plate that comes in contact with the base of FIG. Reference numeral 14 denotes a lock device disposed between the frame 1 and the push rod 3, and a lock member 16 is housed in the cylindrical portion 15 by being pressed toward the push rod 3 by a spring force of a spring. In addition, 3d passes over the lock member 16 by pressing the push button 7 provided on the push rod 3, and
This is a locking step that is locked to 16. The cap 9 fitted in the hole 7a of the push button 7 is made of a transparent member, and illuminates the illuminating section 4 attached to the guide tube 12 provided in the hollow portion 3a of the push rod 3 to the upper surface of the push button 7 via the cap 9. Let it. A hole of the push button 7 into which the cap 9 is fitted.
The diameter of 7a is formed so that the illumination unit 4 can be inserted.

In order to replace the illuminating portion 4 attached to the guide tube 12 provided in the hollow portion 3a of the push rod 3, first, the cap 9 fitted in the hole 7a of the push button 7 is rotated to rotate the push rod 3. And the cap 9 is removed from the push button 7. Then, the push button 7 from which the cap 9 is removed
The guide cylinder 12 disposed in the hollow portion 3a of the push rod 3 through the hole 7a
The illuminating part 4 attached to is removed. Then, after exchanging the illuminating section, the cap 9 is inserted from the upper surface of the hole 7a of the push button 7, and the screw 9c of the cap 9 is screwed into the screw 3c of the push rod 3, and the cap 9 is attached to the push button 7. The replacement of the illuminating portion 4 arranged in the hollow portion 3a of the push rod 3 is performed by removing the cap 9 fitted into the hole 7a of the push button 7, and by passing the illuminating portion through the hole 7a of the push button 7 from which the cap 9 is removed. 4
Can be easily removed without removing the entire push button from the push rod.

[0015]

As described above, the push button switch of the present invention is
The push rod has a hollow portion in which the illuminating portion is housed, and a substantially central portion of the push button is provided with a hole communicating with the hollow portion, and an engaging portion is provided which protrudes toward the push rod from an end surface of the hole. The push rod is formed so as to protrude toward the hole of the push button, and is formed on the inner surface of the engaging portion and the engaging portion which engages with the engaging portion of the push button.
Provided with a threaded portion, and an engaging portion of the push button is engaged with the push rod.
Screw engaged with the joint and coupled to the thread of the push rod
Since the cap having parts and to hold the engagement state between the engaging portion of the engaging portion and the push rod of the push button Nde write fitted into the hole of the push button, pressed or twisting during operation of the push button Looseness of the push button due to operation and prevention of the push button from coming off can be reliably prevented. Further, since the push button having the operation display mark on the front surface of the push button is attached to the push rod by fitting from the front surface of the frame, the operation display mark written on the front surface of the push button is placed at an arbitrary position on the operation panel. Can be located.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a push button switch showing one embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view of a main part showing another embodiment of the present invention.

FIG. 5 is a vertical sectional view of a push button switch showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Operation panel 3 Push rod 3a Hollow part 4 Illumination part 6 Engagement part 6a Projection 7 Push button 7a Hole 8 Engagement part 8a Depression 9 Cap 10 Switch part 11 Operation display mark

Continuation of the front page (72) Inventor Shinkazu Noguchi 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (56) References JP-A-4-92323 (JP, A) 127128 (JP, U) Japanese Utility Model 3-7228 (JP, U) Japanese Utility Model 4-85623 (JP, U) Japanese Utility Model 232610 (JP, U) Japanese Utility Model 58-82735 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 13/14 H01H 13/52

Claims (1)

(57) [Claims] 1. A frame comprising a cylindrical body attached to an operation panel, and a frame disposed at a front end of the frame and provided at a front surface thereof.
A push button switch comprising: a push button on which an operation display mark is written; and a push button attached to a rear portion of the push button, the push button sliding on the inside of the frame by pressing the push button to open and close a contact of a switch unit. Is illuminated
Has a hollow portion which is, in the substantially central portion of the push button the hollow portion
And an engaging portion protruding from the end surface of the hole toward the push rod side. The engaging portion is formed on the push rod so as to project toward the hole of the push button, and engages with the engaging portion of the push button. Providing an engagement portion and a screw portion formed on the inner surface of the engagement portion,
The engaging portion of the push button is engaged with the engaging portion of the push rod, and
To hold Nde write fitted with a cap having a threaded portion which is coupled to the threaded portion of the serial push rod into the hole of <br/> the push button and the engaging portion of the push button the engagement between the engaging portion of the push rod push button switch, characterized in that it was.