JPH054017Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a click stop mechanism for locking a rotating body or a linear moving body at a plurality of positions.

"Prior Art and its Problems" The click stop mechanism is widely used in operating parts that are rotated or linearly moved by manual operation. In the camera field, this click stop mechanism is widely used in shutter dials for setting shutter speed, exposure multiplier setting dials for setting exposure multipliers, and various slide switches.

FIG. 3 shows a conventional example of a rotating click stop mechanism, in which a rotating click body 12 is rotatably supported on a rotating shaft portion 11 of a main body 10, and the periphery of this rotating click body 12 is It faces the back side of the plate-like portion 13 of No. 10 in the figure. This rotary click body 12 is integrated with, for example, a shutter dial, and has click holes 14 provided on its periphery in a number that corresponds to the number of steps on the scale of the shutter dial. The size of this click hole 14 is such that a click ball 15 can be partially fitted therein.

A click ball 1 is mounted on the plate-shaped portion 13 of the main body 10.
A forward/retreat hole 16 into which the click ball 15 is movably fitted is bored, and a plate spring 17 that presses the click ball 15 toward the rotating click body 12 is mounted on the surface of the plate-shaped portion 13 with two caulking holes. It is fixed by a pin 18. The caulking pin 18 fixes the end of the leaf spring 17 on the side opposite to the click ball 15 to the plate-shaped portion 13.

In this click stop mechanism, when the rotary click body 12 is rotated, the click ball 15 is removed from or inserted into the click hole 14 thereof.
In order to release the click ball 15 from the click hole 14, the leaf spring 17 must be bent, which requires a certain amount of rotational force.On the other hand, the click ball 15 is in elastic contact with the surface of the rotating click body 12. When the rotary click body 12 is fitted into the click hole 14 by the force of the leaf spring 17, the rotating click body 12 is locked with a clicking sound when the click ball 15 is fitted into the click hole 14. This is how the click stop works.

However, this conventional device requires a caulking pin 18 to fix the leaf spring 17 to the plate portion 13.
And since the caulking work has to be done,
The problem is that the cost is high. In addition, recently, the main body 10 (plate-shaped part 13) is often constructed from a synthetic resin molded product, and in this case, there is an accident that excessive force is applied to the plate-shaped part 13 during caulking work, resulting in cracking. There has occurred.

``Purpose of the invention'' The object of the present invention is to solve the problems of the conventional device and to provide a click stop mechanism that can fix a leaf spring without requiring a crimping pin.

``Structure of the invention'' The present invention has a plate-like part of the main body that is provided with a retractable hole for the click ball, and a plate spring that presses the click ball that is movably fitted into the retractable hole on the front and back sides of this plate-like part. and a click moving body having a click hole into which a click ball pressed by the leaf spring is partially inserted, in which the leaf spring is constituted by a band-shaped body, and one end of the click moving body is provided. On the other hand, the plate-shaped part of the main body has a click ball advancing/retracting hole, a spring holding part for inserting a leaf spring and restraining its movement in the thickness direction and width direction, and a plate-shaped part. It is characterized in that the locking protrusion that fits into the locking hole of the spring is formed so as to be positioned on a straight line.

According to this configuration, the leaf spring is substantially locked to the plate portion at two locations, the locking protrusion and the spring holding portion, so that the leaf spring can be held without requiring a caulking pin.

The click moving body that is locked by the click ball can be either a rotary type or a linear type.

``Embodiments of the invention'' The invention will be described below with reference to illustrated embodiments. 1 and 2 show an embodiment of the present invention, and the same parts as in the conventional device shown in FIG. 3 are given the same reference numerals. The plate-shaped portion 13 of the main body 10 has a locking protrusion 21 as well as a retraction hole 16 for the click ball 15.
A spring holding portion 22 is provided between the reciprocating hole 16 and the locking protrusion 21 . In other words, the advancing/retracting hole 16, the spring holding part 22, and the locking protrusion 21 are located in a straight line. Spring holding part 22
As a result, a large through hole 23 is bored under the hole.

The width l of the spring holding part 22 and the height h from the surface of the plate-shaped part 13 correspond to the width and thickness of the leaf spring 24, and when the leaf spring 24 is inserted into this spring holding part 22, Its movement in the width direction and thickness direction is suppressed. However, it is possible to bend and deform into the through hole 23. The leaf spring 24 has a locking protrusion 2 at the end opposite to the click ball 15.
An inclined guide part 25 having a higher height than the one shown in FIG.
A single locking hole 26 is drilled into the hole.

When assembling this device having the above configuration, the leaf spring 24 is moved from its inclined guide portion 25 to the spring holding portion 22.
(through hole 23), and after making this contact the surface of the plate-like portion 13, slide it toward the locking protrusion 21 side. Then, since the inclined guide part 25 comes into contact with the locking projection 21, the leaf spring 24 ascends the locking projection 21 according to the slope of the inclined guide part 25, and eventually reaches the locking hole 26.
When the positions of the locking protrusion 21 and the locking protrusion 21 match, the two fit together. Assembly is now complete. Of course, the strip-shaped leaf spring 24 may be inserted into the spring holding part from the opposite side of the inclined guide part 25. Also, this belt-shaped leaf spring 2
4 can be easily removed from the surface of the main body 10 by holding the inclined guide portion 25. That is, since the inclined guide portion 25 moves away from the plate portion 13 of the main body 10 on the outside of the locking hole 26, the leaf spring 24 can be easily removed later.

In this state, as is clear from FIG. 2, the leaf spring 24 is restricted from moving in the width and length directions by the locking protrusion 21, and by the spring holding part 22. movement is regulated. For this reason, the leaf spring 24 does not come off the plate portion 13. The free end of the leaf spring 24 on the side opposite to the locking protrusion 21 receives the spring force toward the click ball 15 because the middle part of the leaf spring 24 is pressed from above by the spring holding part 22. occurs.
Therefore, just like the conventional device, the click hole 1
A click stop mechanism can be obtained which stops the rotating click body 12 every time the click ball 15 is engaged with the click ball 15.

Although the through hole 23 in the main body 10 is not necessarily necessary, it makes it easier for the leaf spring 24 to deform (flex), so that the spring properties of the leaf spring 24 can be effectively utilized. Similarly, although the inclined guide portion 25 of the leaf spring 24 is not necessarily required, it has the advantage that the assembly and installation work of the leaf spring 24 is facilitated.

The present invention has the advantage of not requiring a caulking pin and its caulking work, regardless of the material of the main body 10 (plate-shaped portion 13), but especially when it is made of synthetic resin material, it requires additional caulking work. This is effective because it eliminates the problem of cracking.

Furthermore, although the above embodiment has shown the rotary click body 12 that rotates as the click movable body, the present invention is similarly applicable to a click movable body that moves linearly.

``Effects of the invention'' As described above, the click stop mechanism of the present invention can support the leaf spring on the main body without requiring a crimping pin, reducing the number of parts and eliminating the need for crimping work. Therefore, ease of assembly is improved. In particular, the leaf spring is in the form of a belt and only requires drilling a locking hole at one end, so it is easy to process and the processing cost is low. It can be attached and detached from the opposite side of the body, making it easy to assemble. Furthermore, if the main body is made of a synthetic resin molded product, it is possible to prevent cracking due to caulking work, and in the case of a synthetic resin molded product, the locking protrusion and spring holding part (through hole) are formed using a mold. I can,
Since each of these can be made into a simple shape, the cost of molding does not increase, and an inexpensive click stop mechanism can be obtained as a whole. Further, by providing an inclined guide portion that moves away from the plate-shaped portion of the main body outside the locking hole of the band-shaped plate spring body, it is possible to easily remove the plate spring later.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of essential parts showing an embodiment of the click stop mechanism of the present invention, Fig. 2 is a vertical cross-sectional view of the same assembled state, and Fig. 3 is a longitudinal cross-sectional view showing a conventional click stop mechanism. It is. 10...Main body, 12...Rotating click body, 13
...Plate-shaped portion, 14...Click hole, 15...Click ball, 16...Advance/retreat hole, 21...Latching protrusion, 22...Spring holding part, 23...Through hole, 24
. . . Leaf spring, 25 . . . Inclined guide portion, 26 . . . Locking hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A hole for advancing and retracting a click ball is bored in the plate-like part of the main body, and a click ball that is movably fitted into the hole is pressed on the front and back sides of this plate-like part. A click stop mechanism comprising a leaf spring and a click moving body having a click hole into which a click ball pressed by the leaf spring is partially inserted, wherein the leaf spring is composed of a band-shaped body. , a locking hole is bored in one end thereof, and the plate-shaped part of the main body is inserted through the click ball advance/retreat hole and the spring retaining part for restraining the movement in the thickness direction and the width direction. and,
A locking protrusion that fits into the locking hole of the leaf spring,
A click stop mechanism characterized by being formed in a straight line. (2) In claim 1 of the utility model registration claim, the leaf spring made of a band-shaped body has an inclined guide part curved in a direction away from the plate-shaped part of the main body on the outside of the locking hole at one end thereof. Click stop mechanism.