JPH0350587Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a seesaw switch in which a knob swings around a fulcrum shaft, and in particular, the knob is operated by always ensuring an appropriate clearance with the cover from which it protrudes. To provide a product that maintains good properties, eliminates rattling, and has a simple structure.

[Prior Art] FIG. 4 shows an example of a conventional seesaw switch. The switch body of this seesaw switch is
It consists of a knob a, and bases b and c that are integrated with the knob a so as not to be separated from the knob a by means of screws (not shown) or the like, which sandwich the sides of the knob from both sides.

This switch body s is disposed within an opening e formed in a cover d, and is supported by the cover d by screws or the like. The periphery of the opening e is the base b,
The receiving surface has a slight clearance between it and c. Further, the top of the knob a serves as an operating portion that protrudes to the outside of the cover d. base b, c
The part sandwiched between is almost the same as the base b, c than the top side.
The clearance w formed between the periphery of the top of the knob a and the periphery of the opening e is made as small as possible to maintain a good appearance and operational feel and to prevent dust from entering. It is prevented.

In addition, in Japanese Utility Model Application Publication No. 59-5846, a knob, which is partially exposed through the opening of the cover, is swingably connected to a support member using a screw or a shaft member, and this swinging member is moved inside the cover. A switch that is screwed in is shown.

Furthermore, Japanese Utility Model Application Publication No. 54-125473 describes a switch in which a knob is disposed between a pair of support members formed integrally with a cover, and the knob is pivotally supported at the free end of the support member. .

Furthermore, in Japanese Utility Model Application Publication No. 53-123482, a movable contact member integrated with a knob is swingably sandwiched between a pair of bases, and a fixed contact is provided on the inner surface facing the movable contact.
In addition, a switch is described in which both bases are connected to each other by an engaging portion.

[Problems with the prior art] In the conventional example shown in FIG. 4, the switch body s is a small assembly that is easy to handle, and parts of the bases b and c are inserted into the opening e of the cover d. In order to adopt this, it is essential to have a clearance between the periphery of the opening e, which is the receiving surface of the bases b and c, and the bases b and c, taking into account assembly errors of the switch body s. However, due to this clearance, the cover d
If the bases b and c vibrate together, the bases b and c will come into contact with the periphery of the opening e, causing rattling that generates noise, so it is necessary to prevent this.

Furthermore, when the bases b and c are connected by the engagement means, it is desired to simplify the structure and reduce the number of assembly steps by reducing the number of engagement points.

In addition, the known example of Utility Model Application Publication No. 59-5846 does not have a structure in which the support member is inserted into the opening of the cover.
There is no inherent requirement to prevent wobbling in the present application. Furthermore, mounting means such as screws are required to connect the knob to the support member, which increases the number of steps during assembly.

In the known example of Utility Model Application Publication No. 54-125473, the support member is integrated with the cover, so like the previous known example, there is no need to prevent rattling, and furthermore, the support of the knob by the support member becomes unstable.

In the known example of Utility Model Application Publication No. 53-123482, it seems natural that engaging parts for joining a pair of bases should be provided at least at the four corners, so the structure of the base is complicated and the number of assembly steps is large. Become. Furthermore, there is no mention of preventing rattling between the cover and the base.

The purpose of the present invention is to solve these problems.

[Configuration of the invention] The see-saw switch of the invention includes a knob, a pair of bases placed opposite each other with the knob in between, an engaging part provided on both bases to connect each other, and a seesaw switch that swings the knob. The switch body has a fulcrum shaft provided across both bases for freely penetrating support, a movable contact provided on the knob, and a fixed contact provided on the inner surface of the base corresponding to the movable contact. The switch body is arranged inside the cover, an opening is provided in the cover, parts of both bases are inserted into the opening, and a part of the knob is made to protrude outward from the opening. The fulcrum shaft is integrally formed from one base to protrude toward the other base, the tip of the fulcrum shaft is fitted into a recess formed in the other base, and the fulcrum shaft or recess is used as one vertex. Two engaging parts are provided on each base to form the remaining two vertices of the assumed triangle, and each of these engaging parts consists of an engaging hole and an engaging protrusion. The spacing between the two bases can be adjusted by making the bases large enough to fit loosely, and by providing a step in the thickness direction of the periphery of the opening, the opening can be adjusted in size to sandwich the step. It is characterized in that it has two openings, a predetermined clearance is formed between the periphery of the small opening and the knob, and a portion corresponding to the fulcrum shaft arrangement portion of both bases is sandwiched between the periphery of the large opening. .

[Operation of the invention] Since a clearance as small as possible is formed between the periphery of the small opening and the knob, the operation feeling of the knob, as well as the appearance and dustproof properties are maintained well.

In addition, both bases are sandwiched between the periphery of the large opening, and the spacing between the two bases can be adjusted by configuring the engagement with an engagement protrusion and an engagement hole large enough to fit it loosely. Therefore, both bases can be brought into close contact with the periphery of the large opening, thereby preventing rattling due to vibration between the base and the cover.

In addition, since the peripheral edge of the large opening sandwiched the portion corresponding to the fulcrum shaft installation portion of both bases, the fulcrum shaft portion can be fixed so that both bases will not open by simply engaging the tip of the fulcrum shaft with the concave portion of the base. be done. Moreover, since the fulcrum shaft and the two engaging portions are formed at the respective vertices of the triangle, there are only two engaging portions.

[Embodiment] FIGS. 1 to 3 show an embodiment of the present invention.
FIG. 2 shows the appearance of a motorcycle kill switch incorporating the seesaw switch of the present invention. The switch body of this seesaw switch is
As shown in FIG. 3, it consists of a knob 10, a base 20, and a contact side base 30. The knob 10 consists of an operating section 12 that is raised to be pressed with a finger, and a contact section 14 that extends downward.
A support hole 16 is formed through the boundary at a right angle to the swing direction. Further, there is a contact mounting hole 18 at the lower end of the contact portion 14, and although it is not visible in the drawing, a movable contact is mounted on the opposite side.

The base 20 has a substantially triangular side plate 22,
A fulcrum shaft 24 is integrally formed to protrude from the uppermost corner, and its tip forms a small diameter portion 26 forming a step. Further, from the other two corners of the side plate 22, mounting arms 28 and 29 extend integrally and parallel to the fulcrum shaft 24, respectively. Each mounting arm 28,2
9 are formed with engagement holes 28a and 29a, respectively. These engagement holes 28a, 29a are large enough to loosely fit an engagement protrusion provided on the contact side base 30, which will be described later. When engaged, the distance between the base 20 and the contact side base 30 during assembly can be adjusted in consideration of molding errors, etc. The fulcrum shaft 24 and the mounting arms 28, 29 are integrally formed at portions corresponding to the apexes of the substantially triangular base 20 so as to protrude toward the contact side base 30.

The contact side base 30 has a substantially triangular shape that is symmetrical to the side plate 22, and has a small diameter portion 26 at the top corner.
A recess 32 is formed to receive the contact, and a fixed contact 33 is provided directly below the recess 32 . Furthermore, the fixed contacts 34 and 36 are arranged with a line passing through the recess 32 and the fixed contact 33 as an axis of symmetry.
will be provided. Each fixed contact is connected to a cord 38 on the outside of the base 30. The recess 32 is provided at a portion corresponding to one vertex of the substantially triangular contact side base 30, and engagement protrusions 39a and 39b are formed protruding from the remaining two apex portions sandwiching the portion where the recess 32 is formed, and each has a corresponding mounting point. It can be locked into engagement holes 28a, 29a of arms 28, 29.

As shown in FIG. 1, the bases 20 and 30 are relatively thick, and the cross-sectional dimension of the overlapping bases 20 and 30 and contact portion 14 in the assembled state is larger than that of the operating portion 12. is also getting bigger.

The detailed structure of the cover 40 is shown in FIG.
The periphery of the opening is formed into two steps in the thickness direction by stepped portions 42, and a small opening 44 is formed outwardly (upward in the figure).
However, a large opening 46 is formed inwardly (downward in the figure).

The stepped portion 42 is connected to the operating portion 12 and the contact portion 14 of the knob 10.
The peripheral edge of the small opening 44 protrudes toward the center of the opening in an eave-like manner to reduce the opening area. As a result, a clearance W is formed between the periphery of the small opening 44 on the periphery of the opening and the operating section 12, which is as narrow as possible without impairing the operating feel of the knob.

On the other hand, the peripheral edge of the large opening 46 is recessed in a direction to increase the opening area, and a flange 48 is formed that hangs downward. The periphery of the large opening 46 and the flange 48 are connected to the base 20.
and the contact side base 30 are sandwiched between them and are closely supported on the respective outer surfaces. Further, the portions of the base 20 and the contact side base 30 sandwiched between the peripheral edge of the large opening 46 and the flange 48 correspond to the portions where the fulcrum shaft 24 and the recess 32 are disposed.

When the operating section 12 of the switch body is pushed in the direction of arrow A or B in FIG. 3, the movable contact (not shown) at the bottom of the contact section 14 swings in the direction of arrow C or D, and Switching operation is performed to connect to 36 or 34.

Next, to assemble this switch body, first, the fulcrum shaft 24 of the base 20 is inserted into the support hole 16 from one side of the knob 10 and penetrated, and the small diameter portion 26 is made to protrude to the other side. Next, the contact side base 30 is placed on the side of the contact part 14, the small diameter part 26 is fitted into the recess 32, and the contact side base 30 is fitted into the mounting holes 28a, 29a formed in advance in the mounting arms 28, 29. When the engaging protrusions 39a and 39b of the base 30 are engaged, assembly of the switch body is completed. At this time, there are only two engagement points, and the fulcrum shaft 24 portion simply fits into the recess 32 and the small diameter portion 26. Note that each combination of the mounting hole 28a and the engagement protrusion 39a and the combination of the attachment hole 29a and the engagement protrusion 39b serve as an engagement portion in the present invention.

The switch body assembled in this way is
It can be attached to the cover 40 with screws or the like. At this time, the operating part 12 of the knob 10 is projected outward from the small opening 44 of the cover 40 (see FIG. 2), and there is a gap between the peripheral edge of the small opening 44 and the operating part 12 so that the feeling of operation is not deteriorated. A clearance W is formed that is as narrow as possible.

On the other hand, the fulcrum shaft 24 of the base 20 and the contact-side base 30 and the corresponding portion of the recess 32 are fitted into the large opening 46 . As a result, the peripheral edge of the large opening 46 and the flange 48 are connected to the base 20 and the contact side base 3.
Pinch each outer surface of 0 closely. Therefore, since both bases are supported so as not to open outward at the fitting portion between the recess 32 and the small diameter portion 26, the engagement points can be omitted for the fulcrum shaft 24 portion when assembling the switch body, and the number of engagement points can be reduced. As a result, the structure of the switch body can be simplified and the number of assembly steps can be reduced.

Moreover, the engagement holes 28a and 29a are connected to the engagement protrusion 3.
By loosely fitting 9a and 39b, both bases 20,
The distance between the contacts 30 is adjustable, and is biased in the direction of widening the distance by a contact spring provided at a movable contact (not shown). Therefore, both bases 20,
30 is brought into close contact with the periphery of the large opening 46 and the flange 48, so even if the base 20 and the contact side base 30 vibrate, they vibrate together with the cover 40, so there is no rattling. Noise generation can be prevented.

Furthermore, in this embodiment, the bases 20 and 30 are relatively thick, so that even if the knob 10 swings, there is little deformation and durable support can be achieved.

[Effects of the invention] The present invention forms a fulcrum shaft integrally protruding from one base toward the other base, fits the tip of the fulcrum shaft into a recess formed in the other base, and the fulcrum shaft or Two engaging parts are provided on each base so as to form the remaining two vertices of a triangle that is assumed to have the concave part as one vertex, and the engaging parts are configured with an engaging protrusion in the engaging hole, so that the engaging part By making the hole large enough to allow the engagement protrusion to fit loosely into it, the distance between the bases can be adjusted, and by providing a step in the thickness direction of the periphery of the opening, the opening can be shaped into a step. There are two openings, one large and one small, sandwiching the opening.

Therefore, by having the knob protrude from the small opening, the clearance with the knob can be made as small as possible while maintaining a good operational feel, thereby improving the appearance and dustproof performance.

In addition, by sandwiching the portion corresponding to the fulcrum shaft installation part of both bases between the periphery of the large opening, even though the base is inserted into the opening, the looseness that occurs between the base and the cover can be eliminated, and the looseness can be prevented. Noise generation can be prevented. Moreover, the base inside the large opening can simply have a fitting structure between the fulcrum shaft and the recess, and the engagement structure in this part can be reduced to reduce the number of engagement points to only two when assembling both bases. As a result, the structure of the switch body can be simplified and the number of assembly steps can be reduced.

[Brief explanation of drawings]

Figures 1 to 3 show embodiments of the present invention; Figure 1 is a partial sectional view taken along the - line in Figure 2, Figure 2 is a perspective view of the assembled state, and Figure 3 is an exploded perspective view. It is a diagram. FIG. 4 is a sectional view of a main part of a conventional example. 10...Knob, 12...Operation section, 14...Contact section, 16...Through hole, 20...Base, 24...
Fulcrum shaft, 28a, 29a...Mounting hole, 39a, 3
9b...Engaging protrusion, 30...Contact side base, 40
...Cover, 42...With stepped portion, 44...Small opening, 46...Large opening.

Claims (1)

[Scope of utility model registration request] A knob, a pair of bases disposed opposite to each other with the knob in between, an engaging portion provided to connect the two bases to each other, and an engaging portion that traverses between the two bases to swingably support the knob. The switch body has a fulcrum shaft provided on the knob, a movable contact provided on the knob, and a fixed contact provided on the inner surface of the base corresponding to the movable contact, and the switch main body is disposed within the cover. In addition, in a seesaw switch in which an opening is provided in the cover, parts of both bases are inserted into the opening, and a part of the knob is made to protrude outward from the opening, the fulcrum shaft 24 is connected to one base 20. The tip 26 of the fulcrum shaft 24 is fitted into the recess 32 formed in the other base 30, and the fulcrum shaft 24 or the recess 32 is assumed to be one vertex. Two engaging portions are provided on each base 20, 30 to form the remaining two vertices of the triangle, and these engaging portions are inserted into the engaging holes 28a, 2.
9a and engagement protrusions 39a, 39b, and by making the engagement holes 28a, 29a large enough to allow the engagement protrusions 39a, 39b to fit loosely, both bases 20,
30 is adjustable, and by providing a step 42 in the thickness direction of the peripheral edge of the opening, the opening has two large and small openings sandwiching the step 42, and the periphery of the small opening 44 A predetermined clearance w is formed between the large opening 46 and the knob 10.
A seesaw switch characterized in that a portion corresponding to the fulcrum shaft 24 arrangement portion of both bases 20, 30 is sandwiched between the peripheral edge portions of the two bases.