JPS6128364Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a permanent structure for the contact plate that holds the on/off contacts in a time switch. By doing so, the elastic section of the contact plate can be made to an appropriate length, allowing accurate on/off operation of the contact, and even if it is supported in two places like this, The object of the present invention is to provide a support structure for a contact plate in a time switch that can be easily manufactured.

In this type of structure, the holder with the contact plate attached is attached to the case facing the direction in which the covers join together, and a part of the case has a depth in the direction in which the covers join together. There is a device in which a groove is provided and a part of the contact plate is attached to the bottom of the groove facing in the joining direction (see, for example, Japanese Utility Model Application Publication No. 49-1864). This type of structure has the problem that when multiple contact plates are arranged one above the other, the upper contact plate is located in the middle of the groove, so only the lowest one can be supported in two places. .

Therefore, the present invention is an attempt to solve the above-mentioned problems.It is possible to support each of the multi-stage contact plates in two places, and in addition, such a situation can be reduced by a small amount of time during the work of assembling the contact plates to the case. The aim is to provide a time switch that can be achieved by adding just one step.

The drawings showing the embodiments of the present application will be described below. In Figures 1 to 4, 1 is a case;
It is made of heat-resistant and non-heat-resistant materials (e.g. PBT resin, metal). 2 is a main shaft rotatably attached to the case 1; 3 is a cam connected to the main shaft 2 so as to rotate in conjunction therewith; 4 is a timer motor, which is exemplified as a clock mechanism, as is well known. It is connected to the main shaft 2 via a gear train.
5 indicates a fixing piece for fixing the mork 4.

Next, 6 is a fixing member formed integrally with the case 1, and 7 is a first member detachably attached to the fixing member 6.
It is a support. The first support 7 is made of a material with good insulation and workability (thermoplastic resin, such as Diuracon, AS resin, ABS resin). 8, 8, 8 are contact plates, which are formed using a contact plate material with good elasticity, and the first support 7 makes it impossible to move vertically, horizontally, and perpendicularly to the plane of the paper in FIG. Supported. 9, 9, . . . are contacts, and 10 is a driven piece fixed to the central contact plate 8, which is brought into contact with the cam 3 so as to be able to move the contacts toward and away from the cam 3 in accordance with its unevenness. 11,11
. . . is a terminal portion of the contact plate 8 exposed outside the case, and is a portion for connecting the conductor of the controlled circuit.

Next, 12 is a mounting part formed integrally with the case 1, and 13 is a second support body, which is made of a material with good heat resistance and nonflammability (for example, thermosetting resin such as phenolic resin). Reference numeral 14 indicates a through hole for inserting the contact plate. Next, 15 is a cover, which is made of the same material as the case 1. Reference numeral 16 denotes a holding groove, which is formed in a size that allows the second support body 13 to fit therein.

The switch section in the timer configured as described above is assembled in the following manner. First, case 1
Separately from this, the first support body 7 is molded with the contact plates 8, 8, 8 inserted therein. On the other hand, the second
The support body 13 is also formed separately, and a plurality of through holes 14 are bored therein. Next, the first support body 7 that supports the contact plates 8, 8, 8 is installed between the fixing members 6, 6, and then the terminal part 11 of the contact plate 8 is inserted into the through hole 14 so that the second support body 7 supports the contact plates 8, 8, 8. The support body 13 is the attachment part 12
The cover 15 is located in the retaining groove 1 of the cover 15.
The second support body 13 is fitted into the inside of the second support body 6 to complete the assembly. In this state, the terminal portion 11 is supported by the second support body 13 exposed on the surface of the case 1, and is prevented from wobbling.

Next, FIG. 5 shows a different example of the structure of the terminal portion of the contact plate, in which a separate terminal plate 19 is connected by spot welding to the contact plate main body 18 formed of an elastic material. This terminal board 19 is connected by spot welding, and is supported by the second support body 13e. Note that the connection between the contact plate main body portion 18 and the terminal plate 19 may be made by rivets.

Further, in this embodiment, parts that are considered to have the same or equivalent structure in terms of function as those in the previous embodiment are given the same reference numerals as in the previous embodiment with an alphanumeric letter "e", and redundant explanations are omitted.

As described above, in the present invention, since the contact plate 8 is supported by at least two supports 7, 13, the first and second supports, no matter how long the total length L of the contact plate becomes, the contact 9 to the first support 7, in other words, the elastic section L' for determining the contact pressure and on/off speed of the contact point 9 can be selected to have an appropriate length (short), and the length between the cam 3 and the case Even if the distance between the outer surface and the contact plate 8 is long (the total length of the contact plate 8 is long), the contact 9 can be operated accurately.In addition, the other end of the contact plate (11 etc.) This also has the effect of making it easier to connect other conductors.

As described above, the structure of the present invention is such that even if the contact plate 8 is supported by the first and second supports 7 and 13, the second
Since the structure of the support body 13 is simply that a through hole 14 for passing through the contact plate is formed in the plate body, the structure is simple and has the great advantage of being easy to manufacture. This means that the material appearing on the surface of the case is required to have heat resistance and nonflammability in addition to insulation. Although a material with poor workability is selected due to safety standards, in the present invention the movement of the contact plate 8 in the longitudinal direction is prevented by the first support 7, and the second
It is sufficient to form the support 13 by just drilling holes, and there is a practical advantage that even materials with poor workability can be processed with high workability.

Further, according to the present invention, the first contact plate 8 has a plurality of contact plates 8 arranged three-dimensionally in parallel in the vertical and horizontal directions.
When assembling the support body 7 to the case 1, the first step is to fit the first support body 7 into the groove 6a of the fixing member 6 of the case 1 from the mating direction A, and the second step is to fit the first support body 7 into the groove 6a of the fixing member 6 of the case 1. An assembly in which the plurality of contact plates 8 can be placed in the correct three-dimensional positional relationship with respect to each of the multilayer cams 3 provided in the case 1 by a simple operation of attaching the cover 15 to the case 1. It has the above effect.

Moreover, in the above case, a plurality of through holes 1 are arranged vertically and horizontally in a three-dimensional manner corresponding to the arrangement of the plurality of contact plates 8.
4 to the case 1 in a direction (longitudinal direction of the contact plate 8 in the attached state) that intersects the direction in which the first support 7 and the cover 15 are assembled to the case 1. By simply adding the step of inserting the cover into the mounting part 12 provided after the first step, the holding groove 16 provided in the cover 15 can be inserted into the second step during the second step (attachment of the cover). It is possible to complete the fixation of the second support body 13 to the case 1 by inserting it into the support body 13, and in addition, all of the plurality of contact plates 8 arranged vertically and horizontally are connected to the first support body 7. It has the advantage that all the contact plates 8 can be stably supported by being supported at two points by the second support member 13, which has been completely fixed as shown in FIG.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a rear view of the timer with the cover removed, FIG. 2 is a sectional view taken along the - line, FIG. 3 is a right side view of FIG. 1, and FIG. FIG. 5 is an exploded perspective view of the support portion of the contact plate, and FIG. 5 is a partially enlarged view showing a different embodiment. 1... Case, 3... Cam, 8... Contact plate, 7
...First support, 13...Second support, 9...Contact.

Claims (1)

[Scope of utility model registration request] a case with one side open; a first support;
and a cover formed to be able to be attached to the open part of the case, and the case has a rotatable multi-layered cam on its inner surface and the first support body. A fixing member having a groove that can be inserted in the direction in which the case and the cover are joined is provided, and the first support is provided with the multilayered fixing member when the first support is attached to the fixing member. The intermediate portions of a plurality of contact plates whose contact sides correspond to the respective cams are arranged and fixed in the vertical and horizontal directions, and the inner surface of the cover is fixed to the fixing member in the case. In the time switch, the time switch is configured to abut one surface of the first support when the first support is attached to the case, and the plurality of through holes for passing through the contact plate are arranged in the time switch. The case has second supports arranged vertically and horizontally corresponding to the arrangement of the contact plates, and the case is provided with a mounting part for mounting the second supports, and furthermore, the case has a mounting part for mounting the second supports. The position is such that when the first support body with the contact plate is attached to the fixing member, each terminal side of the contact plate passes through each through hole of the second support body attached to the attachment part. The cover is provided with a holding groove into which the second support member is inserted in the direction of attachment to the case, and the holding groove is located at a position where the second support member is inserted into the mounting portion. A time switch characterized in that the second support body is provided at a position where the second support body can be inserted into the holding groove in the above-mentioned joining direction when the cover is attached to the case with the second support body attached. .