JPS593643Y2 - Rotating dial assembly structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fastening structure between an upper plate and a base plate that can securely retain contact springs and is easy to assemble.

The conventional structure of a rotary dial is as shown in FIG. 1, in which a dial function part such as a contact spring is assembled into an upper plate, and a base plate is fastened to complete the assembly of the main parts.

The upper plate 1 is provided with a pedestal 2 and a stud 3, and the pedestal 2 holds a contact spring 4.

The base plate 5 has a seat 6 and a fastening hole 7, and the tip 3a of the stud 3 is press-fitted into the hole 7 to connect the base plate 5 and the upper plate 1 [C
See figure].

When both (5 and 1) are connected, the contact spring 4 bites into the edge portion of the seat 6, thereby strengthening the steady rest.

FIG. 1d is a view of the upper plate 1 seen from the back side, and functional parts are assembled in this state.

After attaching the contact spring 4 to the pedestal 2, when inserting the cams that are integrated with the main gear 8 into the main shaft 9, the pause time cam 10 hits the contact spring 4, so only dimension C in the summary diagram is required. It is necessary to bias it with a jig etc.

The C dimension is the dimension necessary to provide britension to the spring.

As mentioned above, in the conventional example, since the pedestal 2 for holding the spring string and the stud 3 for fastening are separated, the pedestal 2 receives stress due to the tension of the spring set, causing a creep phenomenon and deformation, resulting in contact pressure and The disadvantage was that the dial signal fluctuated.

Further, during assembly, it was necessary to use a jig or the like to keep the spring assembly uneven, which was inconvenient.

In order to eliminate these drawbacks, the present invention provides a fastening portion on the pedestal, and further provides a pedestal for biasing the contact spring on the base plate to provide the necessary tension.

The drawings will be explained in detail below.

FIG. 2 is an embodiment of the present invention, and FIG. 3 is an exploded perspective view of its essential parts.

The upper plate 11 has a pedestal 12 and a contact spring 1
4, and fastening protrusions 13 are provided on both lower surfaces of the pedestal 12, respectively.

The base plate 15 is provided with a pedestal 16 for spring biasing and a hole 17 for fastening.

By press-fitting the protrusion 13 into the hole 17, the upper plate 11 and base plate 15 are combined as shown in FIG.

Functional parts are assembled into the upper plate 11 in advance, but this is done by turning the upper plate 11 upside down, as in the case of FIG. 1d.

First, the contact spring 14 is press-fitted into the slit of the base 12 and fixed, and finally the cams integrated with the main gear 18 are inserted into the main shaft 19.

At this time, the contact spring 14 is mounted apart from the pause cam 20 so as not to butt against it, so it does not come into contact with the pause cam 20 as in the conventional example.

Next, as described above, when the upper plate 11 and the base plate 15 are connected, the contact spring assembly 14 is brought into contact with the inclined part 16a of the base 16, so that the contact spring assembly 14 is contacted from the position It is tightened at the Y position with a bias of 100 degrees to provide the necessary tension.

14a indicates a portion of the contact spring 14 that contacts the base 16, and a dotted line 14a in FIG. 4 indicates the position immediately before contact.

FIG. 5 is a longitudinal cross-sectional view of a fastening portion of another embodiment, FIG. 5A shows a state immediately before the contact spring 14 contacts the base 16, and FIG.

The pedestal 21 of the upper plate 11 has a fastening protrusion 22.
A rod-shaped fastening guide 22a is attached to the tip of the fastening guide 22a.

The base plate 15 has a fastening hole 23, and as the guide 22a is first inserted into the hole 23 and the pedestal 21 approaches, the inclined portion 16a is exactly at the point when the contact spring 14 contacts the biasing pedestal 16. The work efficiency is high because it guides the robot to the position of

The guide 22a is removed after assembly.

As explained above, according to the present invention, the spring string can be held securely by integrating the fastening part and the pedestal, and the biasing pedestal can provide tension to the spring, while requiring some assembly that was previously required. It can be assembled without using any jigs, and by providing a guide for fastening, it has the effect of improving work efficiency and reducing assembly man-hours.

[Brief explanation of the drawing]

Figure 1 shows a conventional example, Figure a is a side view and rear view, Figure b is an exploded perspective view of the main part, Figure C is a sectional view taken along line A-B, Figure d is a view seen from the back side of the upper plate, and Figure 2. 3 is an exploded perspective view of a main part thereof, FIG. 4 is a partial sectional view of a fastening part, and FIG. 5 is another embodiment of the present invention, and FIG. The longitudinal cross-sectional view and figure b are partial plan views. 1.11... Upper plate, 2.12.2
1...Pedestal, 3...Stud, 13.
22... Protrusion for fastening, 22 a...
Fastening guide, 5, 15... pace tart,
7.17.23...Hole for fastening, 10.20.
...Pose time cam, 16...Plinth for biasing, 16a...Incline part.

Claims (1)

[Scope of Claim for Utility Model Registration] l In a rotary dial in which the dial function part is incorporated into the upper plate and the main part is assembled by fastening the base plate, the fastening part is attached to the contact spring holding part formed integrally with the upper plate. An assembly structure of a rotary dial characterized in that a contact spring biasing portion is provided integrally with a base plate. 2. The rotary dial assembly structure according to claim 1, wherein a fastening guide is provided in the fastening portion provided on the contact spring holding portion.