JPS6140035Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cover structure for a switch. For example, the lower opening of a fly switch is sealed with a cover plate to prevent flux from entering the switch case when the switch is attached to a circuit board. The purpose is to provide a structure that can improve performance.

1A to 1C are a side view, a front view, and a bottom view of an embodiment of a lever switch to which an embodiment of the switch cover structure according to the present invention is applied, and FIGS. FIG. 2 is a partially cutaway side view and a longitudinal sectional front view taken along line A-A in FIG. In the figure, a lever switch 1 has a case 2,
The case 2 is formed by bending a metal plate into a box shape, and has a pair of bent mounting plates 3 each having a screw hole 3a on the front side, and openings each having an engaging recess 4a at both front ends. A portion 4 is formed, and protrusions 5 and 6 are further provided at the lower end.

Reference numeral 7 denotes an insulating substrate, through which a plurality of terminals 8 are implanted, and is attached and fixed to the lower surface of the case 2 by bending the protrusion 6. As a result, as shown in FIG. 2A, an opening 9 is formed in front of the substrate 7 on the lower surface of the case 2 to allow the sliding operation of the convex portion 10b of the slider 10, which will be described later. The slider 10 has a convex portion 10b having an engagement hole 10a and a sliding contact (not shown), and is disposed on the upper surface of the substrate 7 so as to be slidable in the directions of arrows A and B in the figure.

A lever 11 is pivotally supported on the case 2 by a pin 12, and its engaging portion 11a engages with the engaging hole 10a of the slider 10.

13 is a cover plate made of resin molding,
As shown in FIG. 3 and FIGS. 4A to 4C, it has a U-shaped cross section consisting of a bottom plate portion 14 and both side plate portions 15, and has stepped portions 14a at both rear ends of the bottom plate portion 14 and L-shaped protrusions on both sides. The portions 14b are each integrally formed. Further, a semicircular recess 15a and an engaging protrusion 15b are integrally formed on the outer surfaces of both side plate portions 15, respectively. This cover plate 13 is located at the opening 9 of the case 2, as shown in FIGS. 1 and 2.
At this time, each side plate part 15 has its respective engaging convex parts 15b connected to the case 2.
After being elastically deformed inward by the amount of contact and riding up on the inner surfaces of both side plates, each of the engaging convex portions 15b is attached to the case 2.
It engages with the engagement recess 4a of the opening 4 and undergoes elastic return displacement. At the same time, the pair of L-shaped convex portions 14b engage with the outer surfaces of both side plates of the case 2, respectively, and the bottom plate portion 1
The step portion 14a of No. 4 comes into contact with the front end of the substrate 7, and positioning is performed in the front-rear direction. Thus, the cover plate 13 is positioned to be locked to the case 2 through the above-mentioned engagements and abutments, and the bottom plate portion 14 closes and seals the opening 9 of the case 2. When removing the cover plate 13, as shown in FIG.
5 can be elastically displaced inward and pulled downward, and installation and removal are extremely easy.

Next, the lever switch 1 having the above-mentioned structure has the lever 11 with respect to the panel 21, as shown in FIG. 1A.
After the mounting plate portion 3 is brought into contact with the mounting plate portion 3, the bolts 22 are screwed into each screw hole 3a to be fixed. At this time, the rear end protrusion of the bolt 22 is housed in the semicircular recess 15a of the cover plate 13, and no interference occurs.

Further, another printed circuit board (not shown) is attached and fixed to the lower surface of the lever switch 1.
In this case, the case protrusions 5, 6 and the terminals 8 are inserted into the printed circuit board and solder-dipped. At this time, the flux that rises due to capillary action or vaporization is blocked by the bottom plate 14 of the cover plate 13 at the opening 9 of the case 2, so the flux enters the case 2 and adheres to the contacts, causing poor contact. There will be no inconvenience such as waking up. Note that the cover plate 13 has a similar effect in preventing solder waste and dust from entering.

For the operation of lever switch 1, refer to lever 1.
1 is successively rotated in the direction of center marks E and F in FIG. It makes switching contact with the terminal 8 to switch the contact.

In the embodiments described above, the case 2 and the cover plate 13 may be engaged with each other by providing an engagement protrusion on the case 2 and an engagement recess on the cover plate 13.

Also, although the above embodiment is applied to a lever switch, it can also be applied to other slide switches, rotary switches,
It can be applied to various switches such as push switches that have an opening on the bottom surface of the case.

As described above, the switch cover structure according to the present invention includes a case that houses the switch mechanism, has first engaging portions at predetermined portions on both sides of the case, and has an opening at a predetermined portion on the lower surface; It has a roughly U-shaped cross section and has second engaging portions at predetermined portions of both side plates, and after being fitted into the case through the opening, the first and second engaging portions are engaged, respectively. The switch is constructed with a resin cover plate that is locked in place and the U-shaped bottom plate seals the opening, so the flux that rises when this switch is electrically fixed to another printed circuit board with a solder dip is eliminated. Moreover, since the cover plate prevents solder shavings, dust, etc. from entering the case, good contact performance can be obtained without insulating the contacts with these unnecessary materials and causing poor contact. Moreover, since the cover plate and the case are fixed by engagement, the cover plate and the case can be attached and detached with a single touch.

[Brief explanation of the drawing]

1A to 1C are a side view, a front view, a bottom view, and a second embodiment of a lever switch to which an embodiment of the switch cover structure of the present invention is applied, respectively.
Figures A and B are a partially cutaway side view of the lever switch 1, and a longitudinal cross-sectional view taken along line A-A in Figure A, respectively;
FIG. 3 is a perspective view of a cover plate constituting the lever switch, and FIGS. 4A to 4C are a plan view, a side view, and a front view of the cover plate, respectively. 1...Lever switch, 2...Case, 4,9
...opening, 4a...engaging recess, 7...substrate, 8
... terminal, 10 ... slider, 11 ... lever,
13...Cover plate, 14...Bottom plate part, 15...Side plate part, 15b...Engagement convex part, 21...Panel.

Claims (1)

[Scope of utility model registration request] A case that houses a switch mechanism, has first engaging parts at predetermined parts on both sides of the case, and has an open end at a predetermined part on the lower surface, and a second engaging part, which has a roughly U-shaped cross section and is located at predetermined parts on both side plates. After the case is fitted into the case through the opening, the first and second engaging parts are engaged and locked, and the opening is closed by the U-shaped bottom plate. The switch cover structure consists of a sealing resin cover plate.