JPS647544Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a digital switch that outputs a predetermined digital signal in response to a switching operation, for example.

FIG. 1 shows a well-known digital switch. A cylindrical rotating body (hereinafter referred to as a rotor) 12 is provided inside the case 11 so as to be rotatable. Display characters (not shown) are provided on the circumferential surface of the rotor 12, and the display characters are visible through a window 13 made of a translucent member provided on the front surface of the case 11. Further, a cam 14 is formed integrally with the rotor 12 at the center of rotation of the rotor 12, and an elastic engagement member (not shown) that restricts the rotation of the rotor 12 is engaged with the cam 14. Further, on the front part of the case 11 and on both sides of the window part 13, there are operating elements 15 and 1.
6 is inserted through it so that it can come in and out. These controls 1
Coil springs 17 and 18 are interposed between the inner ends of the case 11 of 5 and 16 and the inner bottom of the case 11,
The coil springs 17 and 18 cause the operator 15,
16 is biased in the direction of protruding from the case 11. Engagement parts 19 and 20 are provided in the intermediate parts of these operators 15 and 16, and these engagement parts 19 and 2
0 is engaged with the cam 14 in accordance with the pushing operation of the operators 15 and 16. Accordingly, the cam 14 and the rotor 12 are rotated in the direction of the arrow A or B in accordance with the operation of the operators 15 and 16, and accordingly, a contact mechanism (not shown) provided on the rotor 12 and the case 11 rotates the cam 14 and the rotor 12 in a predetermined direction. A digital signal is output.

Incidentally, coil springs 17 and 18 that bias the operators 15 and 16 are interposed between the inner ends of the case 11 of the operators 15 and 16 and the inner surface of the case 11. This has the disadvantage that the case 11 is large enough to accommodate the coil springs 17 and 18.

Therefore, as shown in _FIG .
A method has been considered in which the holding part 25 is interposed between the holding part 25 and the holding part 25 protruding from the inner surface of the case 24. With such a configuration, it is possible to downsize the case 11. However, in order to hold the operator 21 so that it does not come out, for example, an E-ring 27 must be provided in the groove 26 provided at the inner end of the case 24 of the operator 21, which increases the number of parts and requires the coil spring 22. Since the E-ring 27 must be attached in a compressed state, assembly is complicated.

This invention was made based on the above circumstances, and its purpose is to provide a digital switch operator that can suppress the increase in the size of the case and the number of parts, and is easy to assemble. be.

An embodiment of this invention will be described below with reference to the drawings.

3 to 6, a printed circuit board 32 having a circuit pattern (not shown) printed on the inner surface is provided on the side surface of the case 31.
Terminals 33 ₁ to 33 ₇ connected to the circuit pattern are printed on the outer end of the case 31 of No. 2. Further, inside the case 31, a substantially cylindrical rotor 34 made of, for example, a translucent member is provided. A cam 34 ₁ is formed integrally with the rotor 34 inside the rotor 34 and at the center of rotation.
A cylindrical projection 31 ₁ formed on the inner surface of the case 31 is rotatably fitted into the center of the cam 34 ₁ . A protrusion 31 ₃ of an elastic engagement member 31 ₂ formed on the side surface of the case 31 is engaged with the cam 34 ₁ to restrict rotation of the rotor 34 . Further, on the peripheral surface of the rotor 34, display characters 34 ₂
(shown in FIG. 3), and this display character 34 ₂ faces a window 31a provided on the front side of the case 11. This window portion 31a and the rotor 3
A cover 35 made of a transparent material is provided between the rotor 34 and the printed circuit board 32.
It is formed integrally with ₂ . This spacer member 35 ₂
There is a through hole 35 ₁ that is slightly smaller than the diameter of the rotor 34.
A circuit pattern constituting the digital code formed on the printed circuit board 32 is exposed through the through hole 35 ₁ . A packing P made of an elastic material is provided between the spacer member 35 ₂ and the printed circuit board 32 along the periphery of the through hole 35 ₁ .
will be provided. Further, a holding portion 31 ₄ is provided inside the rotor 34 and on the inner surface of the case 31 facing the window portion 35 . A light emitter, that is, a light emitting diode 36 is held in this holding portion ₃₁₄ .
Lead wires 36 ₁ , 36 ₂ of this light emitting diode 36
6, extends from the edge of the rotor 34 along the circumferential surface, passes through the spacer member ₃₅₂ , and is connected to the printed circuit board 32. In this state, the lead wires 36 ₁ and 36 ₂ are connected to the terminal 33, respectively.
₁ , 33 ₇ connected to a continuous circuit pattern. Further, circuit patterns constituting other digital codes are respectively connected to the terminals 33 ₂ to 33 ₆ . Thus, when the light emitting diode 36 is turned on, the displayed characters 34 ₂ can be clearly seen through the window 35 . Furthermore, a movable contact piece 37 is provided on the side surface of the rotor 34 and is capable of contacting a circuit pattern constituting the digital code formed on the printed circuit board 32.

On the other hand, operators 38 and 39 are inserted into the front part of the case 31 and on both sides of the window part 35 so as to be freely removable and removable. The tips of the inner ends of the operating elements 38 and 39 are bent toward the outer ends of the case 31, and the overall shape of the operating elements 38 and 39 is approximately U-shaped. Case 3 of the bent controls 38 and 39
Engagement parts, such as protrusions 38 ₁ and 39 ₁ , which protrude inward of the rotor 34 are provided at the tip of the inner end of the rotor 34, and these protrusions 38 ₁ and 39 ₁
8 and 39 can be engaged with the cam 34 ₁ in a state where they are pushed inward into the case 31 . In addition, guide holes 38 2 , 3 are formed on one side of the inner end of the case 31 of the operators 38 , 39 along the moving direction of the operators 38 , ₃₉ .
9 ₂ is formed as shown in FIG. Note that only the operator 39 is shown in FIG. Projections 31 ₅ and 31 ₆ formed on the inner surface of the case 31 are inserted into the guide holes 38 ₂ and 39 ₂ . Coil springs 40 and 41 are interposed between the protrusions 31 ₅ and 31 ₆ and recesses 38 ₃ and 39 ₃ formed in the outer end of the case 31 of the operators 38 and 39, respectively. The operating elements 38 and 39 are always urged in the direction of protruding from the case 31 by the elements 40 and 41. The positions of the inner ends of the operating elements 38 and 39 in the case 31 are regulated by protrusions 31 ₇ and 31 ₈ formed on the inner surface of the case 31 and the inner surface of the case 31.

In the above configuration, when the operators 38, 39 are not operated, the operators 38, 39, the rotor 34, etc. are in the positions shown in FIG. 4. Here, if the operator 39 is pushed in against the biasing force of the coil spring 41, the case 3 of the operator 39
The protrusion 39 ₁ formed at the inner end of the rotor 34 is engaged with the cam 34 ₁ , and when the operator 39 is further pushed in, the rotor 34 moves in the direction of arrow C in the figure against the biasing force of the elastic engagement member 31 ₂ . The cam ₃₄₁ is rotated by one step. Thus, the contact state between the movable contact piece 37 and the circuit pattern formed on the printed circuit board 32 is switched. When the pushing force on the operator 39 is released from this state, the operator 39 is returned to the state shown in FIG. 4 by the biasing force of the coil spring 41. Also,
When the operator 38 is pushed in, the rotor 34 moves the cam 34 in the direction of arrow D in the figure by the same operation as described above.
Rotated by ₁ step.

According to the above configuration, the guide holes 38 ₂ , 39 ₂ are provided in the operating elements 38 , 39 along the moving direction thereof, and the protrusions 31 ₅ , 31 ₅ are inserted into the guide holes 38 2 , 39 ₂ .
Coil springs 40 and 41 are interposed between 31 ₆ and the recesses 38 ₃ and 39 ₃ of the operators 38 and 39, respectively. Therefore, since the storage space for the coil springs 40 and 41 is small, it is possible to suppress the case 31 from increasing in size. Moreover, the controller 3
8, 39 is assembled by inserting the protrusion 3 into the guide holes 38 ₂ and 39 ₂ .
1 ₅ and 31 ₆ , the outer end of the case 31 is inserted into the front part of the case 31, and then the coil spring 4 is inserted.
0, 41 into the recesses 38 ₃ of the operators 38, 39,
39 ₃ and attaching the other end to the protrusions 31 ₅ and 31 ₆ , the process is extremely simple and the number of parts does not increase.

As described in detail above, according to this invention, it is possible to suppress an increase in the size of the case and the number of parts, and to provide a digital switch operator that is easy to assemble.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a conventional digital switch, FIG. 2 is a configuration diagram showing a digital switch operator different from that in FIG. 1, and FIGS. 3 to 7 show a digital switch according to this invention. Fig. 3 is a partially cutaway front view, Figs. 4 and 5 are side views with different parts cut away, and Fig. 6 is different from Figs. 4 and 5. FIG. 7 is a side sectional view seen from a different direction, and a perspective view showing the operator taken out. 31...Case, 32...Printed circuit board, 34...
Rotor, 34 ₁ ... cam, 38, 39 ... operator,
38 ₁ , 39 ₁ ... protrusion, 38 ₂ , 39 ₂ ... guide hole, 31 ₅ , 31 ₆ ... protrusion, 40, 41 ... coil spring.

Claims (1)

[Scope of utility model registration request] In a digital switch operator that is installed in and out of a case and that switches the contact state by rotating a rotating body that is rotatably installed inside the case,
A guide hole is provided at the inner end of the case of the operator along the entry/exit direction, a protrusion provided on the inner surface of the case is inserted into this guide hole, and the operator is constantly inserted between this protrusion and the inner surface of the operator. An operator for a digital switch, characterized in that an elastic member is interposed to bias it in a protruding direction.