JPH0134834Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a dial mechanism for a repeating time switch.

[Background technology]

Conventionally, there are typical repeatable time switches shown in FIGS. 1 and 2. That is, the dial body 1 rotates at a constant speed at a constant cycle, and a plurality of setters 2 attached to the outer periphery of the dial body 1 actuate a switch 3 to turn on/off electrical equipment at a predetermined time. This has a configuration in which a setter 2 is inserted and fixed into a plurality of setter holes 4 arranged in a row on the peripheral edge of a dial body 1, and the end of the setter 2 switches a switch 3. For example, the setter hole 4 is
They are set at 15 minute intervals. The switch 3 is opened and closed each time each setter 2 operates the switch lever 3a with which it engages.

In this conventional device, the setting element 2 is the dial body 1.
It is prepared separately from the switch 3, and the setter 2 is inserted into the setter hole 4 corresponding to the time when the switch 3 needs to be changed.
had to be inserted and fixed, and the setter 2 had to be removed from the setter hole 4, which did not require switching. As a result, changing the mounting position of the setting element 2 in response to a change in the switch switching time is relatively complicated and easy to make mistakes, and the setting element 2 that is not in use is easily lost. Furthermore, it was necessary to provide a housing section for the unused setter 2 in the time switch main body 5.

Furthermore, in conventional devices, there are those that use a single-shaped setter for both on-off operations, and those that use a setter that has a dedicated shape for on-off operations. In the former case, there is a disadvantage that it is difficult to distinguish between on and off operations at each time when switching a complex program, and in the latter case, the structure is complex and it is not easy to replace the program. It was hot. Furthermore, since the parts themselves are small and in large quantity (96 pieces per machine at 15 minute intervals), managing the parts is difficult.

Therefore, we proposed a system in which a setting element is swingably attached to the dial body, and the on/off switching is performed by raising and lowering the setting element (Japanese Patent Application No. 58-31403). According to this, the setting is easy and problems such as loss of the setter can be solved. However, it was difficult to confirm the raised/lowered state of the setter, and the reliability of the setter operation was insufficient.

On the other hand, there were some models that provided a click protrusion on the setter to make it easier to confirm whether the setter was up or down (for example, Japanese Patent Application Laid-open No. 149735/1983), but in order to hold the setter on the dial body, The drawback was that assembly work was required.

[Purpose of invention]

The purpose of this invention is to provide a dial mechanism for a time switch that can eliminate the need for assembling a setter.

[Disclosure of invention]

The dial mechanism of this invented time switch is
a plurality of setter holes arranged on a circumference, a bearing recess formed on one side between the plurality of setter holes and whose axial direction is the circumferential direction of the circumference; The other surface between the setter holes has an arcuate surface formed with the bearing recess as a center of curvature, and further has a crosspiece formed in the setter hole parallel to the axial direction, and these It has an integrally molded dial body, an insertion part inserted into the setter hole, a shaft part provided on one end side of the insertion part and pivotally supported in the bearing recess, and the insertion part It has a wide part that is provided on the other end side and slides on the arcuate surface, and is protruded from the middle part of the insertion part so that the side surface slides on the crosspiece, and when the insertion part rotates, the tip of the insertion part slides into the arcuate surface. It has an elastic piece for driving a switch that can protrude from the setter hole, and is formed on the side surface of the elastic piece and rides over the crosspiece to determine the position where the elastic piece protrudes from the setter hole and the setting. The dial body has a click protrusion that is positioned at a position accommodated in the center hole, and a setter which is integrally molded into the setter hole of the dial body.

According to the configuration of this invention, since the setter is molded into the setter hole of the dial body, the dial body can be molded as part of the mold with the setter incorporated in the setter hole. . This eliminates the need for assembling the setter. Moreover, since the variation in the gap between the setter and the setter hole is minimized due to molding, the setter can be rotated smoothly.
Furthermore, since the click protrusion passes over the crosspiece, a click feeling is obtained, so that the raised/lowered state of the setter can be confirmed.

Embodiment An embodiment of this invention is shown in FIGS. 3 to 9. This dial mechanism consists of a dial body 6 and a plurality of (for example, 96) setting elements 7. The dial body 6 is made of hard plastic.
It is formed into a disk shape, and a plurality of slit-shaped setter holes 8 penetrating the front and back surfaces and extending in the radial direction are arranged in an annular shape near the outer periphery. Setter hole 8
The radially inner end surface of the dial body 6 is formed into an inclined surface 8a, and has a cylindrical bearing recess 9 (FIG. 5) at the lower edge of the radially outer end of both side surfaces. A crosspiece 10 is provided in the radial middle of the setter hole 8, extending between the lower edges of both sides.
The dial main body 6 has an annular arcuate surface 11 on the outer periphery of the upper surface. Different color portions 12 are provided on the outer periphery of the arcuate surface 11 by hot stamping, two-color molding, or the like.

The setter 7 is made of thermoplastic plastic and is formed to have approximately the same thickness as the setter hole 8. The setter 7 has an insertion portion 7a in the setter hole 8, and has a shaft portion 13 on the radially outer edge of the lower end that rotatably fits into the bearing recess 9, and is in the upright state shown in FIG. 9A. and the ninth
It is possible to swing between the collapsed state shown in Figure B. The lower part of the setting element 7 is thinned out to provide elasticity, and this allows the elastic piece 1 for driving the switch to be removed.
4 is formed. The elastic piece 14 has an inner edge formed in an arc shape centered on the center O of the shaft portion 13,
As the setter 7 swings, it comes into sliding contact with the crosspiece 10 while elastically contacting it. The inner edge of the elastic piece 14 is provided with a click protrusion 15 which, when the elastic piece 14 is deflected, goes over the crosspiece 10 and engages with the upper and lower edges of the crosspiece 10. A wide portion 16 is provided at the upper edge of the outer end of the setter 7 and protrudes radially outward and is wider than the other portions. The wide part 16 is for preventing the setting element 7 from coming off, and is for preventing the setting element 7 from being removed.
It moves along the arcuate surface 11 on the upper surface of.

Note that this dial mechanism is installed, for example, above a rotating member (not shown) that rotates at a certain period of time, and is connected to a switch lever 17 attached to this rotating member.
(FIG. 9) hits the elastic piece 14 of the setter 7 to turn on.

Operation Figure 9A shows the off state. At this time, the setter 7 is completely raised, and its lower end is in the setter hole 8.
It is in a state where it does not stand out.

FIG. 9B shows the on state. At this time, the setter 7 is inclined obliquely in contact with the inclined surface 8a of the setter hole 8, and its lower end protrudes from the setter hole 8. Therefore, the switch lever 17 engages with the setter 7 as the rotating member to which it is attached rotates, and the switch is turned on.

In this way, by raising and lowering the setter 7, the time can be easily set. Since the setting element 7 is not attached to or removed from the dial body 6, unlike the conventional setting element 7, which is detachable, there is no need to provide a storage section for unused setting elements 7, and the setting element 7 can be made smaller and more compact. There are no problems such as installation mistakes.

When the setter 7 is raised and lowered, the click protrusion 15 of the setter 7 rides over the crosspiece 10, providing a click sensation. Therefore, the user can intuitively know whether the setter 7 is up or down, that is, whether it is on or off, and the reliability of the operation of the setter 7 is improved. Also, the crosspiece 1
0 is provided for clicking, but the 9th
When the switch lever 17 engages with the elastic piece 14 of the setter 7 as shown in Figure B, the elastic piece 14
support. Therefore, the deflection of the elastic piece 14 is reduced, and malfunction of the switch is prevented. When the setting element 7 is raised, the different color part 12 of the dial body 6 is hidden by the wide part 16 of the setting element 7. Therefore, an on/off display can be obtained depending on whether or not the different color portion 12 is hidden. Further, in this dial device, the setter 7 is connected to the dial main body 6 as follows.
It can be molded into a built-in state.

A method of manufacturing this dial mechanism is shown in FIGS. 10 and 11. FIG. 10 shows the state of the dial main body 6 during molding. In the figure, 18 is a front side mold, 19 is a back side mold, and the front side mold 18 is provided with a protrusion 18a that forms a setter hole 8.
The back side mold 19 has an auxiliary mold fitting hole 20, and an auxiliary mold 22 whose tip protrudes into the casting space 21 is fitted into the auxiliary mold fitting hole 20. Subsidy mold 2
Reference numeral 2 forms a bearing recess 9 at the tip, and the tip surface is rounded in an arc shape.

A thermoplastic melt (for example, polyacetal resin) is injected into the mold thus assembled, and the dial body 6 is molded.

When the dial body 6 is molded and hardened, the dial body 6 is molded into the front mold 1 while remaining in the back mold 19.
8 and remove the other front mold 1 as shown in Figure 11.
Replace with 8'. Further, the auxiliary mold 22 is sunk into the auxiliary mold fitting hole 20. In this way,
A thermoplastic hard plastic melt is injected from the gate 24 into a casting space 23 formed by another front side mold 18', the back side mold 19, the dial body 6, and the auxiliary mold 22, and the setter 7 is molded. do.
Therefore, the setter 7 is molded to fit into the setter hole 8 of the dial body 6. Due to the contraction of the resin after molding, the setter 7 has a thickness that allows it to swing within the setter hole 8 of the dial body 6.

In this way, the dial body 6 is used as a part of the mold to mold the setter 7 in a state where the setter 7 is fitted into the setter hole 8, so that the dial body 6 and the setter 7 are becomes a one-piece dial mechanism. Therefore, assembly of the setter 7 is not necessary, and mass production can be performed with high efficiency.

Further, since the setter 7 is molded within the setter hole 8, variations in the gap between the setter hole 8 and the setter 7 are minimized, and smooth rotation of the setter 7 can be achieved.

Furthermore, the shaft portion 13 of the setting element 7 is also connected to the dial body 6.
Since it is molded so that it fits into the bearing recess 9,
Unlike the case where the shaft portion 13 is fitted later, there is no need to provide play for the fitting operation, and the setter 7 can be prevented from coming off easily.

[Effects of the invention] The dial mechanism of the time switch of this invention is
Since the setter is molded into the setter hole of the dial body, the dial body can be used as part of the mold.
The setter can be molded in a state that it is incorporated into the setter hole. This eliminates the need for assembling the setter. Moreover, since the variation in the gap between the setter and the setter hole is minimized due to molding, the setter can be rotated smoothly. Furthermore, since a click feeling is obtained when the click protrusion passes over the crosspiece, it is possible to confirm the raised/lowered state of the setter.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional example, Fig. 2 is a sectional view thereof, and Fig. 3 is a partial plan view of an embodiment of the invention.
FIG. 4 is a partially enlarged perspective view of the same, FIG. 5 is a partial perspective view of the dial body, and FIG. 6 is a partial perspective view of the dial body upside down.
Fig. 7 is a perspective view of the setting element, Fig. 8 is a perspective view of the setting element from the back side, Figs. 9A and B are illustrations of its operation, and Fig. 10 is the molding of the dial body. FIG. 11 is a partial sectional view of the mold for forming the setter. 6... Dial body, 7... Setting element, 7a...
Insertion part, 8... Setter hole, 9... Bearing recess, 10
... Crosspiece, 11 ... Arc surface, 13 ... Shaft, 14
...Elastic piece, 15...Click projection, 16...Wide part.

Claims (1)

[Claims for Utility Model Registration] A bearing having a plurality of setter holes arranged on a circumference, formed on one side between the plurality of setter holes, and whose axial direction is the circumferential direction of the circumference. a concave portion, an arcuate surface formed with the bearing concave portion as a center of curvature on the other side between the plurality of setter holes, and further formed in the setter hole parallel to the axial direction; a dial body having a crosspiece and integrally molded together; an insertion portion inserted into the setter hole; a shaft provided at one end of the insertion portion and pivotally supported in the bearing recess; a wide part provided on the other end side of the insertion part and slidingly in contact with the circular arc surface; a wide part provided protrudingly in the middle part of the insertion part so that the side surface slides in contact with the crosspiece, and The elastic piece has an elastic piece for driving the switch whose tip can be protruded from the setter hole by rotation of the part, and when the elastic piece is formed on the side surface of the elastic piece and goes over the crosspiece, the elastic piece moves into the setter hole. A time switch having a click protrusion positioned at a position protruding from the hole and a position housed in the setter hole, and a setter which is integrally molded into the setter hole of the dial body. dial mechanism.