JPH0446341Y2 - - Google Patents

Description

[Detailed Description of the Invention] -Field of Industrial Application- This invention relates to a lever-operated electric switch used in telephones, telephone-integrated facsimile devices, telephone switches such as intercoms, and the like.

-Prior Art- Telephones and some intercoms use a hook switch that operates the device when the handset is connected or disconnected. This type of switch is a lever-operated switch that opens and closes electrical contacts using the weight of the handset.Due to its nature, it is required to be small and inexpensive to manufacture, and to improve the reliability of the device. Recently, a semi-closed type is required.

Generally, this type of switch includes a contact member made of a leaf spring, a rotating shaft with a protrusion (called a card) that activates the contact, an operating lever, and a lever that returns the rotating shaft and operating lever. It is composed of a return spring, a main body case, and a cover. Among these, the contact member and the return spring are metal parts, and the other parts are generally plastic molded parts. In order to manufacture a switch in a small size and at low cost, it is preferable to reduce the number of parts, and conventionally, as shown in FIG. A structure is adopted in which both ends of the rotating shaft 31 are sandwiched and supported from both sides by the main body case 1 and a cover 46 fitted therein. In addition, as another structure, as shown in FIG.
and the operation lever 30 are separated, and the rotation shaft 3 is connected to the through holes 11, 11 provided in the main body case 1 and the cover 46.
As a structure for pivotally supporting 1, there is also a structure in which the cover 46 is simply a plate.

According to such a conventional structure, there are three plastic molded parts (injection molded parts) (the cover 46 in FIG. 4 is a stamped molded part).

-Problems to be solved by the invention- As mentioned above, in order to manufacture a switch that is small and inexpensive, it is better to have as few parts as possible, and in particular, reducing the number of molded parts will reduce mold costs and molding costs. Cost can be reduced. Therefore, the purpose of this invention is to obtain a switch with a structure that reduces the number of molded parts and reduces the number of man-hours for assembling parts.

-Means for solving the problem- In the structure of this invention, the rotating shaft 31 and the operating lever 30 shown in Fig. 4 are integrated, and the main body case 1 has a unique shape. The main body case 1 can be closed with a cover 46, and the number of molded parts is two.

Specifically, an operating lever 30 is integrally provided at one end of a rotating shaft 31 provided with a card 37, and a through hole 11 in which a card passage notch 16 is connected and formed is provided in the side wall 5 of the main body case 1. A shaft housing 12 connected to the through hole 11 is formed on the main body case in a cantilevered manner, and a slit 13 connected to the notch 16 is provided in this shaft housing 12 with a width that allows the card to swing. The surface of the main body case 1 opposite to the side wall 5 is open, and the contact seats 7 and 8 and the spring receiver 17 into which the contact members 41 and 43 and the return spring 40 are inserted and attached are inserted into the main body case 1 from this opening surface 2. It is formed. The lever 30 has
A flat portion 32 that closely contacts the side wall 5 of the main body case is formed on the inner side surface of the base end, and the card insertion notch 16 is closed by this flat portion 32.

-Operation- The switch 50 of this invention has the rotating shaft 31 inserted into the through hole 11 of the main body case 1, and the contact member 41,
43 and the return spring 40 are inserted and attached from the opening surface 2 side, and the opening surface 2 is closed with a cover 46 to be assembled. At this time, the card 37 passes through the card insertion notch 16 and is located inside the main case 1, and the card 37 passes through the slit 1 provided in the shaft housing 12.
It is possible to swing within 3. The card passage notch 16 is closed by the proximal inner side surface 32 of the assembled lever 30, resulting in a quasi-sealed structure of the switch 50.

The opening surface 2 of the main body case 1 can be closed with a cover 46 manufactured by stamping a metal or plastic plate. In some cases, the cover 46 can be omitted by attaching the main body case 1 with the opening surface 2 in close contact with the switch mounting surface of a telephone or other device.

According to the above structure, the only molded parts that require a mold are the operating lever 30 and the main body case 1, and the number of molded parts can be reduced by one.

-Embodiment- Figures 1 and 2 show an embodiment of a switch according to the present invention, with Figure 1 being an exploded perspective view and Figure 2 being a front view with the cover removed. In the figure, 1 is a main case having a U-shaped cross section with an opening surface 2, 3 and 4 are side walls connected to the opening surface, 5 is a side wall facing the opening surface 2, 6 is a bottom plate of the case, and 7 and 8 are a contact seat formed at the inner corner of the main body case; 9 and 10 are fitting grooves formed in the contact seat; 11 is a through hole provided at the center of the side wall 5 for inserting a rotation shaft to be described later; 12 is a cylindrical shaft housing having an inner hole communicating with the through hole;
3 is an axial slit provided in the shaft housing;
14 is a notch provided on the opposite side of the slit 13; 15 is a convex piece protruding from the inner peripheral surface of the tip of the shaft housing; 16 is an L-shaped card passage connected to the through hole 11 and provided on the side wall 5; The notch is connected to the slit 13. 1
7 is a spring receiver integrally formed on the side wall 5 in parallel with the shaft housing 12; 18 and 19 are locking holes formed in the side walls 3 and 4 on the opening surface 2 side of the main body case;
21 is a terminal hole of a contact member provided on the opening surface 2 side of the main body case of the bottom plate 6, 22 is a protrusion provided along the bottom of the side wall 5, and 23 is provided at the upper corner of the main body case. It is a receiving member.

Reference numeral 30 designates an operating lever that integrally has a rotation shaft 31, and the lever is wide from the center to the base, and has a flat portion 32 formed therein. 33 is a tapered surface of the lever, and 34 is a stopper formed at the base end of the lever 30. 35 is a recess formed on the lower peripheral surface of the tip of the rotating shaft 31; 36 is an arm protruding from the rotating shaft 31 in a direction perpendicular to the axis; 37 is a semi-cylindrical card provided at the tip of the arm; 38 is also a receiving member formed at the tip of the arm. 40
41 is a return spring; 41 is an L-shaped contact member having a contact 42; 43 is an L-shaped contact member provided with a plate spring 44 extending horizontally; 45 is a contact formed at the tip of the plate spring 44; 46 is a contact at both ends. This is a cover having protrusions 47 and 48 on the sides.

To assemble the switch 50, insert the pivot shaft 3 integrally formed with the lever into the through hole 11 of the main body case.
1 is inserted, and the recess 35 of the rotating shaft is engaged with the convex piece 15 of the shaft housing, so that the rotating shaft 31 is mounted in the shaft housing 12 so as to be rotatable but not slidable in the axial direction. At this time, the arm 36 of the rotation axis and the card 3
7 is inserted into the main body case 1 via the card passage notch 16. At the same time as the rotation shaft 31 is mounted on the shaft housing 12, the card passage notch 16 is closed by the flat portion 32 of the operating lever 30. Next, the contact members 41 and 43 and the return spring 40 are inserted through the opening surface 2 of the main body case and fitted into the contact seats 7 and 8 and the spring receiver 17, respectively. At this time, the leaf spring 44 of the contact member is located below the card 37 that is already attached, and the return spring 40
One end is locked to the receiving member 23 of the main body case, and the other end is locked to the receiving member 38 of the rotating shaft. Finally, locking hole 1
8 and 19 by engaging the convex pieces 47 and 48 to cover 46.
The opening surface 2 is closed by attaching the main body case 1 to the main body case 1.

It is also possible to omit the convex piece 15 and the recess 35 and attach the rotation shaft 31 to the shaft housing 12 in a rotatable but non-slidable manner using the return spring 40. In this case, the notch 14 is also unnecessary.

In the switch 50 assembled in this way, when no pressing force is applied to the operation lever 30, the lever 30 is urged in the clockwise rotation direction in the drawing by the return spring 40, and the stopper 32 is pushed against the protrusion of the main body case. The card 37 is in contact with the leaf spring 44.
Since they are separated from each other, the contacts 42 and 45 are in contact with each other. When the pressing force is applied, the operating lever 3
0 moves downward against the biasing force of the return spring 40, and as a result, the rotating shaft 31 integrated with the lever rotates and moves the card 37 downward (to the position shown by the imaginary line in FIG. 2).
The contact 45 of the leaf spring is separated from the contact 42. The downward movement of the operating lever 30 is stopped when its tapered surface 33 comes into contact with the protrusion 22 of the main body case.

-Effects of the invention- According to the structure of this invention described above, the number of molded parts that make up the switch can be reduced to two, which is one less than the conventional product, further reducing mold costs and molding costs. can be done.

[Brief explanation of drawings]

The figure shows one embodiment of this invention. Figure 1 is an exploded perspective view of the switch, Figure 2 is a front view of the assembled switch with the cover removed, and Figures 3 and 4 are conventional 1 is an exploded perspective view showing only the plastic molded parts of the switch structure; FIG. In the figure, 1...main case, 2...opening surface, 5...
...Side wall, 7...Contact seat, 8...Contact seat, 11...
Through hole, 12... Shaft housing, 13... Slit, 16... Card passage notch, 23... Receiving member, 30... Operating lever, 31... Rotating shaft, 3
2... Plane portion, 37... Card, 40... Return spring, 41... Contact member, 43... Contact member, 4
4... leaf spring, 46... cover.

Claims (1)

[Scope of utility model registration request] In the switch, the main body case 1 includes an operating lever 30 integrally provided with a rotating shaft 31 and a card 37, a main body case 1 housing contact members 41 and 43, and a case cover 46. It is formed into a box shape, and the main case 1
A through hole 11 into which a rotating shaft 31 for contact operation is inserted is provided in the side wall 5 facing the opening surface 2, and a card passing notch 16 connected to the through hole is provided. slit 13
A cylindrical shaft housing 12 is formed so as to be cantilevered and connected to the through hole 11, and the slit 13 of the shaft housing has a width that allows a card 37 provided on the rotation shaft 13 to swing. Furthermore, a contact member 4 is inserted into the main body case 1 from the opening surface 2 thereof.
Contact seats 7 and 8 are provided, into which the contacts 1 and 43 are inserted and mounted in a direction parallel to the shaft housing 12.
The operating lever 30 provided at the base end of the rotating shaft is provided with a flat portion 32 at its base that closely contacts the side wall 5 of the main case to close the card insertion notch 16, and the opening surface 2 of the main case. A switch that can be closed with a flat cover 46.