JPS5823152Y2 - Lever in lever switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a lever switch in which a rotating lever drives a slider that holds a movable contact and slides on a fixed contact.

Lever switches can switch more circuits than toggle switches, so they are often used to switch electronic circuits.

FIG. 1 is a partially cutaway side view of the lever switch.

In the figure, 1 is a frame, 2 is a lever pivotally supported by a support 5 provided on the frame 1, and has an operating part 2a at one end, a cam part 2b at the other end, and a drive piece 2C at the lower end.

Reference numeral 3 denotes a spring receiver fixed to the frame 1, and houses a coil spring 4 therein.

A ball 9 is interposed between the tip of the coil spring 4 and the cam portion 2b of the lever 2.

A slider 6 houses a clip-shaped movable contact 7 therein, and has a hole 6a into which a drive piece 2C provided on the lever 2 fits.

Both 8□ and 82.8g are fixed terminals, and the insulating board 10
' is formed integrally with the fixed contact disposed above.

This switch is changed by rotating the lever 2.

That is, when the lever 2 is rotated in the direction of the arrow, the drive piece 2C of the lever 2 moves the slider 6 in the direction of the arrow.

Therefore, the movable contact 7 also moves accordingly, and the fixed terminal 8
The conduction circuit between □ and 8° is switched to the conduction circuit between the fixed terminals 82 and 83.

Further, the ball that has been fitted into the valley of the cam portion 2b climbs over the peak of the cam portion 2b due to the rotation of the lever 2.

Therefore, moderate switching is performed.

Incidentally, the lever 2 of the conventional lever switch is formed by punching out a metal plate by press working, but during punching, vertical stripes 2d as shown in FIG. 2 are produced on the fractured surface, that is, the surface of the cam portion 2b.

If this vertical stripe 2d is used as is, the ball 9
This causes a large amount of friction between the two, causing a so-called roughness in the switching operation, and resulting in a poor usability.

If this drawback is to be improved, shaving processing and barrel polishing will be required as additional processing, resulting in a very high cost of the switch.

Further, since the cam portion 2b comes into contact with the metal ball 9, the cam portion 2b is subject to severe wear and tear, which requires the troublesome work of hardening the lever.

The present invention is a new invention that improves the above-mentioned drawbacks of the conventional art, and its purpose is to provide a cam portion of a lever switch that has a simple structure and can perform smooth adjusting operations.

In order to distantly relate to the purpose of the present invention, the present invention provides a lever that switches a circuit by placing a slider holding movable contacts on fixed contacts arranged on an insulating substrate and sliding the slider with a lever. The switch has a cam molded body made of synthetic resin that has a holding part on one side and cam ridges and troughs that contact the adjustment ball on the other, and a cam molded body that has an operating part on one side and a cam molded body on the other side. It has a lever provided with a retaining part for engaging and holding, and has a structure in which the retaining part of the cam molded body and the retaining part of the lever are removably fitted,
The present invention will be explained in more detail with reference to Examples below.

FIG. 3 is a side view showing an embodiment of the present invention, with a part cut away.

In FIG. 3, reference numeral 10 denotes a lever, which is formed by pressing a metal plate, similar to conventional switches.

An operating portion 10a is formed at one end of the lever 10, a cam portion 10b is formed at the other end, and a driving piece 10C is formed at the lower end.

Note that the same parts as those shown in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted.

As clearly shown in FIG. 4, the cam portion 10b of the lever 10 has a recess 10d that digs deeply into the metal part.
Two claw pieces 10e are provided at the entrance of the depression 10d, and the claw pieces 10e and the depression 10d form an engaging portion that engages with a cam molded body 11 described below.

Reference numeral 11 denotes a cam molded body, which is made of a synthetic resin such as boacetal resin or polyamide resin that can be molded relatively easily and that slides well when sliding in contact with metal.

A part of the cam body 11 has two cam ridges 11a, llb and 1.
cam valleys 11C are formed, and a holding portion 11d is formed on the opposite side of the cams.

Then, the claw piece 10e of the lever 10 is inserted into the groove of the holding part 11d.
The cam molded body 11 is attached to the cam portion 10b of the lever 10 by fitting them together.

Note that if the width of the groove provided in the holding portion 11 d of the cam molded body 11 is made narrower than the thickness of the lever 10, the cam molded body 1
1 to the lever 10, it is convenient because it can be firmly attached.

FIG. 5 is a perspective view showing another embodiment of the present invention.

In the figure, 20 is a lever, 20b is a cam portion, and 20C is a drive piece.

The cam portion 10b of the lever 20 has a rectangular depression 20d.
is formed to form a retaining portion that engages with a cam molded body 21 described below.

A cam molded body 21 is made of the same synthetic resin as in the previous embodiment.

A part of the cam body 21 is provided with a protrusion 21b which is a holding part for the lever 20 provided with a groove 21a, and on the opposite side thereof, cam ridges 21C and 21d and a cam valley 21e are provided.

Then, the cam molded body 21 is attached to the lever 20 by fitting the groove 21a of the protrusion 21b and the circumferential edge of the recess 20d provided in the lever 20.

FIG. 6 is a perspective view showing another embodiment of the present invention.

In the figure, 30 is a lever, 30b is a cam portion, and 30C is a drive piece.

The cam portion 30b has two cam ridges 30d. 30 e and 1
A plurality of cam valleys 30f are formed to form a retaining portion that engages with the cam molded body.

Reference numeral 31 denotes a cam molded body, which is made of the same synthetic resin as the embodiments shown so far, and has an appearance similar to the cam part 3 provided on the lever 30.
0b, and has an inner hole 32 which receives the cam part 30b and serves as a holding part for the lever 30.

Then, the cam molded body 31 is attached to the cam portion 30b of the lever 30.
Cover it completely and attach it to the lever 30.

Note that, as is clear from the configuration of the above embodiment, the cam molded body and the cam portion of the lever can be attached and detached.

In this way, in the present invention, the surface of the cam part of the lever that comes into contact with the click stop ball 9 is made of synthetic resin, so that there is no roughness when rotating the lever to change the switch.

Additionally, the friction between the lever and the ball has been reduced to approximately one-tenth of that of conventional switches, making it possible to switch the lever switch with a very light touch.

In addition, since lever hardening, shaving processing, and barrel polishing are no longer required, the manufacturing process is extremely simple, even though one additional cam molding is required, and the switch cost can be lowered than before. The effect is enormous.

Furthermore, since the cam molded body is removable from the cam part of the lever, it is easy to change the shape of the cam molded body to create a switch with a completely different feel, and if the lever becomes defective, it can be repaired. It also has the advantage of being simple.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional lever switch, Fig. 2 is a partial perspective view of the lever, Fig. 3 is a side view showing an embodiment of the present invention, and Fig. 4 is a portion of the lever and a cam forming body. FIG. 5 is an exploded perspective view showing a lever part and a cam molded body of another embodiment, and FIG. 6 is an exploded perspective view of a lever part and a cam molded body of yet another embodiment. It is. In the figure, 10 is a lever, 10 is a cam part, 11 is a cam molded body, 11a and 11b are cam crests, 11C is a cam valley,
11d is a holding part.

Claims (1)

[Scope of utility model registration request] A lever switch in which a slider holding a movable contact is placed on fixed contacts arranged on an insulating substrate and the slider is slid by a lever to switch the circuit, has a holding part on one side and a regulating ball on the other. A cam molded body made of synthetic resin having cam ridges and troughs that come into contact with the cam molded body, and a lever that has an operating part on one side and a retaining part that holds and holds the cam molded body on the other side. A structure of a lever in a lever switch, characterized in that a holding part of a body and a holding part of the lever are removably fitted together.