JPH0419692Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to the structure of a push button switch.

(Prior Art) As shown in FIG. 3, push-button switches used in various devices and devices can be operated by pressing an operation knob (key top) c protruding from a hole b in a housing a, as shown in FIG. It is designed to turn on and off a push switch e attached to a printed circuit board d.

(Problems to be Solved by the Invention) According to the conventional push-button switch as described above, when the operation knob c is pressed, it may tilt and get caught in the hole b of the housing a. Movement is unstable and rattling is likely to occur, and if the housing is of an illuminated type with a light source provided within the housing, there is a drawback that light leaks through the gap between the holes b. Furthermore, since the housing a is not provided with a stopper mechanism when the operation knob c is pressed,
Pressing too hard may destroy the push switch. The operation knob c is connected to the housing a.
This is inconvenient because it cannot be replaced from the front side. The purpose of this invention is to provide a push button switch that solves all of the problems of the conventional art.

(Means for Solving the Problem) As a means for achieving this object, this invention forms a recess in the housing that has a space for accommodating the operation knob and regulates its stroke, and the recess Subsequently, a cylindrical part is opened and communicated with the bottom of the recess and has a guide groove formed on the inner wall, and a flange rib is formed in the middle part of the outer wall, and below the flange rib there is a cylindrical part with a guide groove formed in the inner wall. A slider having an engaging protrusion formed thereon, a locking pawl formed at the upper part, and a switch mounting part formed at the lower part is inserted into the cylindrical part from below so that the protrusion fits into the guide groove, The gist is that an operating knob is attached to the upper part of the slider protruding toward the recessed portion by being engaged with the locking pawl, and the upper end of the shaft of a push switch provided on the printed board is fitted into the switch mounting portion. It is something to do.

(Example) This invention will be specifically explained below with reference to the illustrated example. Reference numeral 1 denotes a housing, in which a recess 2 and a cylinder 3 following the recess are integrally connected, and the cylinder 3 connects to the recess 2 through an opening 2a formed in the bottom of the recess 2.
It communicates with The recess 2 has a space for storing an operation knob to be described later, and is formed at a depth that regulates the stroke of the operation knob.
It is formed into a rectangular shape, and a guide groove 3a is formed in the vertical direction at the center of each of its four inner wall surfaces. Reference numeral 4 denotes a slider, and a flange rib 5 is provided in the middle of the outer wall in the shape of a hook at each corner.Protrusions 6 that engage with the guide groove 3a are formed below the flange rib, respectively. Locking pawls 7 are formed at both ends of the upper portion, and a switch mounting portion 8 consisting of a locking pawl 8a and a stopper piece 8b is provided inside the lower portion. In addition,
In order to impart some elasticity to the protrusion 6, a second
As shown in the figure, a notch 4a is provided at the upper end of the slider 4 so as to sandwich the protrusion 6, and the locking pawl 8a of the switch mounting portion 8 is also provided with some elasticity. Reference numeral 9 denotes a box-shaped operation knob that opens downward, and the slider 4 is attached to the side wall of the operation knob.
A hole 9a that engages with the locking pawl 7 is provided oppositely.
10 is a push switch, and printed board 11
installed on.

The slider 4 is inserted into the cylindrical portion 3 from the back side of the housing 1, as shown in FIG. 2, and the projections 6 of the slider are fitted into the guide grooves 3a of the cylindrical portion 3, respectively. At this time, the top of slider 4 is
Since it protrudes toward the recess 2 side, the operation knob 9 can be attached to the upper end of the slider 4 from the front side of the housing 1.
The operation knob 9 can be attached by covering the hole 9a and locking the locking pawl 7 in the hole 9a. The push switch 10 can be mounted by inserting the upper end of the shaft 10a into the switch mounting portion 8 of the slider 4, thereby forming a push button switch as shown in FIG. can.

(Function) The pushbutton switch according to this invention is constructed as described above, and when the operating knob 9 is pressed, the slider 4 descends, and in conjunction with this descent, the shaft 10a of the pushbutton switch 10 descends to turn the switch on and off. It can be turned off. During this switch operation, the protrusion 6 of the slider 4 slides along the guide groove 3a of the cylindrical portion 3 of the housing 1, so the slider 4 moves smoothly and does not cause sideways vibration, and as a result, the operation knob 9 can perform vertical movement extremely stably. Further, when the operation knob 9 is pressed down, it is received by the edge of the opening 2a of the recess 2, so this opening edge acts as a stopper, preventing the operation knob from being pushed down too much as in the conventional case. This can prevent damage to the push switch due to

Furthermore, in the case of this invention, since the slider 4 is provided with the flange rib 5 and the protrusion 6 of the slider 4 engages with the guide groove 3a of the cylindrical part 3, there is a gap between the slider 4 and the cylindrical part 3. There are almost no gaps between the housings, and even if the housing is of an illuminated type with a light source provided within the housing, the light rays will not leak as in the case of conventional housings. Further, the operation knob 9 is inserted into the slider 4 from the front side of the housing 1.
Since it can be attached and detached from the upper end of the unit, it can be easily replaced.

(Effects of the invention) As explained above, according to this invention, it is possible to prevent the operation knob of a pushbutton switch from getting caught in the hole in the housing or shaking when the switch is operated. Moreover, it has excellent effects such as preventing damage to the switch due to excessive pushing of the operating knob and making it easy to replace the operating knob.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main parts showing an embodiment of this invention, FIG. 2 is an exploded perspective view of the main parts, and FIG.
The figure is a schematic sectional view of main parts showing a conventional example. DESCRIPTION OF SYMBOLS 1... Housing, 2... Recessed part, 2a... Opening, 3... Cylindrical part, 3a... Guide groove, 4... Slider, 5... Flange rib, 6... Protrusion, 7...
...Latching claw, 8...Switch mounting part, 9...Operation knob, 9a...Hole, 10...Push switch, 1
1...Printed board.

Claims (1)

[Scope of utility model registration request] A recess is formed in the housing and has a space for accommodating the operating knob and regulates the stroke thereof.The recess is followed by a cylindrical part that has a bottom surface of the recess open for communication and a guide groove formed on the inner wall. A flange rib is formed in the middle part of the outer wall, a protrusion that engages with the guide groove is formed below the flange rib, a locking pawl is formed at the upper part, and a switch mounting part is formed at the lower part. inserting the slider into the cylindrical portion from below so that the protrusion fits into the guide groove, and attaching the operating knob to the upper part of the slider protruding toward the recess by engaging with the locking pawl; The structure of a pushbutton switch is characterized in that the upper end of the shaft of the pushbutton switch provided on the printed board is fitted into the switch mounting portion.