JPH0425791Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a bell mounting structure for a timer with a bell.

BACKGROUND OF THE INVENTION Conventional conventional timers with bells are configured so that when set, the timer switch is turned on, and when the set time has elapsed, the switch is turned off, the timer stops, and a bell is struck.

FIG. 4 shows a conventional example of a bell mounting structure in the above-mentioned timer with a bell. protrusion 1
4a into the hole 15a at the center of the bell 15, and swage it to attach the bell 15 to the bell mounting plate 14. Then, the cover 13 with the bell 15 attached is placed on the lower plate 1.
It looks like it will end up at 6.

However, in the above structure, the bell 15 is attached to the timer main body 12 via the bell mounting plate 14, which has the disadvantage that the structure is complicated, the number of assembly steps increases, and the timer becomes expensive.

Problems to be Solved by the Invention The present invention is designed to eliminate the above-mentioned drawbacks of the conventional technology.It simplifies the bell mounting structure, making the timer cheaper, and increases the strength of the bell mounting. The present invention provides a bell mounting structure for a timer with a bell.

Means for Solving the Problems The present invention will be explained below based on the drawings. 1st
The figure is a schematic structural diagram, Figure 2 is a partially cutaway plan view of the timer, and Figure 3 is a front view of the timer.In the timer body 1, 2 is the lower plate, and 3 is the timer. A mounting plate for attaching to electrical appliances, 4 is a cover attached to the lower plate 2 together with the mounting plate 3, and a well-known clock device (not shown) using Zenbu as a drive source is housed inside. .

Reference numeral 5 denotes a main shaft which is rotated at a constant speed by the timepiece, and a tip portion 5a protruding from the cover 4 has a knurled eye.

6 is a cam attached to the main shaft 5, 7 is a plunger driven by the cam 6, and S is a switch assembled in a switch case 8, which is opened and closed via the plunger 7. These are housed in the cover 4 together with the clock device.

A striking lever 9 is pivotally supported on the upper surface of the cover 4, and is always engaged with the plunger 7 by a coiled spring 10. The striking lever 9 swings in conjunction with the plunger 7 by the rotation of the cam 6, so that the striking portion 9a strikes the inside of a bell 11, which will be described later.

Next, 11 is a bell having a burred hole 11a in the center, and the bell 11 is attached to the tip 5a by press-fitting the tip 5a of the main shaft 5 into the hole 11a.

Function In the above configuration, how to attach the bell 11,
and its effects will be explained.

First, the bell 11 is placed with the open end 11b facing upward. Next, with the tip 5a of the main shaft 5 facing downward, insert it into the burred hole 11a at the center of the bell 11, and press the rear end of the main spindle 5 with a press or the like, and the tip 5a will be press-fitted into the hole 11a, causing the bell 11 is attached to the tip portion 5a.

The bell 11 attached to the tip 5a of the main shaft 5 rotates together with the main shaft 5, but since it is attached at the center of the bell 11, the mutual positional relationship between the bell 11 and the striking lever 9 can be maintained uniformly. The bell 11 is struck by the striking lever 9 without adversely affecting the bell striking function.

Effects of the invention As described above, in the present invention, the tip of the main shaft with knurled eyes protrudes from the timer body, the tip is press-fitted into the burred hole in the center of the bell, and the bell is attached to the tip of the main shaft. Compared to the conventional method, in which the half-cut protrusion at the top of the bell mounting plate, which was caulked to the cover of the timer body, was inserted into the hole in the center of the bell, and the bell was caulked to the bell attachment plate. , there is no need for a bell mounting plate or caulking work, reducing the number of parts and assembly man-hours, making the timer cheaper.

In addition, in the present invention, the diameter of the tip of the main shaft is made as large as possible, and a knurl is formed, and a bar ring is provided in the hole in the center of the bell, and this bell is attached to the tip of the main shaft by press fitting. Therefore, compared to the conventional method of attaching the bell by caulking it to a small-diameter protrusion that is cut out half-way at the top of the bell mounting plate, the bell attachment strength is superior and the bell is less likely to loosen or come off. have.

According to experiments, it has been confirmed that the mounting strength of the bell of the present invention is approximately three times that of the conventional bell.

In addition, in this invention, the bell is attached to the tip of the main shaft by press-fitting, so if the bell is to be removed later for repair or adjustment of the clock device, the bell can be removed without destroying the tip of the main shaft. Since it can be removed, it also has the advantage that the bell can be reattached to the tip of the main shaft.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram of the present invention, FIG. 2 is a plan view of a timer, FIG. 3 is a front view of the timer, and FIG. 4 is a front view of a conventional example. 1... Timer body, 5... Main shaft, 5a... Tip, 11... Bell, 11a... Hole.

Claims (1)

[Scope of utility model registration request] With a bell, the tip of the main shaft with knurled eyes protrudes from the timer body, and the bell is attached to the tip of the main shaft by press-fitting the tip into a burred hole in the center of the bell. Bell mounting structure related to timer.