JPS6313066B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an increment feeding device employed in a rotary switch or the like, and particularly to an increment feeding device that performs increment feeding with different strokes.

2. Description of the Related Art Hitherto, a knurling feed device that feeds a rotary member in increments by swinging a swinging member is well known.

By the way, in the conventional increment feeding device of this kind, the rotary member can only be incremented by one pitch in one swing operation. had the inconvenient problem of having to repeat the increment feed several times.

The present invention has been made to solve this problem, and the swinging member can be swinged in two different strokes, so that it is possible to swing the swinging member in two different strokes. It is an object of the present invention to provide an increment feeding device that can selectively operate the above-mentioned increment feeding.

Therefore, in this invention, when the swinging member is operated with an operating load that is less than or equal to a predetermined load, the swinging stroke of the swinging member is controlled. a first stroke limiting mechanism that limits the swing stroke of the swing member to a first stroke; and a swing stroke of the swing member that is larger than the first stroke when the swing member is operated with an operating load greater than a predetermined load; A second stroke limiting mechanism is provided to limit the stroke to a second stroke, and when operated with a relatively weak force, normal step feed can be performed, and when operated with a strong force, several steps of step feed can be performed once. Its basic feature is that it can be performed using the following operations.

The first stroke limiting mechanism includes a moderation member biased by a spring, and an inclined cam member that increases the spring force on the moderation member substantially in proportion to the swing stroke amount when the swinging member is swung. and,
It can be constructed by a stopper provided on the slope cam member so as to temporarily stop the moderation member when the swinging member is swung by the first stroke.

When such a type of moderation mechanism is adopted, it can also be used as a return mechanism that automatically returns the swinging member or the operating lever that operates it after operation, and also works in conjunction with the stopper of the inclined cam member to adjust the cam surface. By forming the second stroke limiting mechanism, the second stroke limiting mechanism can also be configured, so the overall structure can be greatly simplified.

Furthermore, in another embodiment of the present invention, the first stroke limiting mechanism includes an elastic member that moves in conjunction with the swinging of the swinging member, a guide member that guides the elastic member to elastically deform when the swinging member swings, and a guide member that guides the elastic member to elastically deform when the swinging member swings. A stopper is provided on the guide member so as to temporarily stop the elastic member when the movable member is swung by the first stroke.

With this configuration, a kind of moderation mechanism can be formed by the elastic member and the stopper of the guide member, and the increment feed by the first stroke can be confirmed by this moderation movement.

Hereinafter, the present invention will be described in more detail based on illustrated embodiments.

First, FIG. 1, which shows the increment feeding mechanism adopted in this embodiment, will be explained.

In Fig. 1, 1 is a base, 2 is a disc-shaped rotating member that is rotatably supported around a rotating shaft 3 installed on the base 1, and 4 is a disc-shaped rotating member that is supported on the rotating member 2 and is supported around the rotating shaft 3. A swinging member on which a bearing portion 4a is swingably supported; 5 is an operating member having a sector gear 7 at one end that meshes with a sector gear 6 carved along the outer circumferential arc of the swinging member 4; The swinging member 4 can be pivoted around the rotating shaft 3 by being pivotally mounted by a support shaft 8 and operated in both push and pull directions.

The rotary member 2 has inward teeth 11 for moderation carved into the inner circumferential surface of the arc-shaped vertical wall portion 10a of the cover 10 whose four corner legs are fixed on the base 1, and the rotary member 2.
The inwardly facing teeth 11 are controlled by a moderation mechanism constituted by a steel ball 14 which is supported by a coil spring 13 compressed in the storage portion 12 provided in the radial direction.
Moderation is given for each tooth, and the feed is performed in increments.

Furthermore, a pair of inwardly directed teeth 15, 15' are provided on the rotating member 2, which are raised one step along the outer periphery of the rotary member 2, while a pair of inwardly facing teeth 15, 15' are provided on the swinging member 4, respectively, extending in the circumferential direction from both ends of the sector gear 6. Sending arm 16,
16', and feed pawls 17, 17 that extend from between the bases of the feed arms 16, 16' and the bearing portion 4a to the tips of the feed arms 16, 16', and that go around the tips at a slight interval. A pair of connecting arms 18, 18' each having a diameter 18' are provided to constitute a feeding mechanism for the rotating member 2.

In the above configuration, from the state shown in FIG.
When the oscillating member 4 is swung counterclockwise around the rotating shaft 3 by rotating it around the hour hand, as shown in FIG. , comes into contact with the tip of the sending arm 16 in a slightly elastically deformed state. Since this feed arm 16 has a predetermined rigidity, it supports the feed pawl 17 without deforming, and as the swinging member 4 swings, the feed pawl 17 supports the inward teeth of the rotating member 2. 15 to rotate the rotating member 2 counterclockwise.

During this rotation, moderation is applied each time the steel ball 14 passes over a tooth of the inward teeth 11 by a moderation mechanism constituted by the inward teeth 11 for moderation and the steel ball 14.

In this case, the operating stroke of the operating member 5, in other words, the swing stroke of the swinging member 4, is set so that two or more step feeds can be performed in one operation stroke, and one step feed is performed. and,
It is possible to selectively feed in two or more increments.

FIG. 2 shows an example of a mechanism for selecting the operating stroke of the operating member 5, and therefore the swinging stroke of the swinging member 4. As shown in FIG.

That is, as shown in FIG. 2, in this example,
A moderation mechanism 20 is provided between the cover 10 and the operating member 5.

This moderation mechanism 20 includes a rotating member 2 and a swinging member 4.
A fitting tube 21 having a central axis that coincides with a straight line connecting the center of the rotating shaft 3 and the center of the support shaft 8 of the operating member 5.
is provided on the cover 10, and this fitting tube 21 has a coil spring 22 and a moderation pin 23 with a rounded tip.
The moderation pin 23 is elastically supported so as to be freely protrusive and retractable, while the slope cam member 24 is integrally mounted on the intermediate portion between the support shaft 8 of the operating member 5 and the sector gear 7 in the width direction thereof. It is constituted by forming it into.

The slope cam member 24 includes a pair of left and right slope cams 25, 25' that slope left and right with respect to the straight line from a point intersecting the straight line connecting the two centers, stopper parts 26, 26' consisting of step parts, and Planar cams 27 and 27' extending in a direction substantially perpendicular to the straight line are provided on the moderation pin 23 in succession to the stopper portions 26 and 26'. The slope cams 25, 25' are set so that when the operating member 5 is operated in either direction, the moderation pin 23 can be pushed in approximately in proportion to the operating stroke amount, and the length thereof is Now, operating member 5
The setting corresponds to the stroke for performing one increment feed.

At the stroke end corresponding to this one increment feed, as shown in FIG.
It engages with either one of the stopper portions 26 or 26'. Therefore, if an attempt is made to operate the operating member 5 any further, a large resistance will be applied to the operating member 5, which is necessary for the moderation pin 23 to overcome either one of the stopper portions 26 or 26'. In other words, the moderation pin 23 is connected to the stopper portion 26 or 26'.
When the operating member 5 is operated with an operating load smaller than the load corresponding to the force required to overcome the Only when operated with an operating load, the moderation pin 23 can overcome the stopper portion 26 or 26' to perform two or more increments.

Then, when the operating member 5 is made to make a large stroke with a large operating load, the moderation pin 23 is moved to the planar cams 27 and 2 provided continuously to the stoppers 26 and 26'.
7', the coil spring 22 is pushed into the fitting cylinder 21 to a position where it cannot be compressed any further, and as a result, the operating member 5 cannot be operated any further. At this stage, the operator can recognize that two or more increments have been made.

Then, regardless of whether one increment feeding or two or more increment feeding is performed, the operating member 5
When the hand is released, the moderation pin 23 pushes the slope cam 25 or 25' or the planar cam 27 or 27' of the slope cam member 24 by the spring force of the coil spring 22 provided for the moderation pin 23. This pressing force is
The moderation pin 23 acts to push the operating member 5 back to the neutral position, and finally the moderation pin 23 is inserted into the depressed portion formed as the meeting point of the two inclined cams 25 and 25'.
falls and causes the operating member 5 to automatically return to its neutral position. Corresponding to the return of the operating member 5 to the neutral position, the swing member 4 is also automatically returned to its neutral position.

In addition, as shown in FIG. 2, the cover 10
On the upper wall 10b, there are guide pins 28 erected at the bases of the feed claws 17, 17' of the connecting arms 18, 18'.
Preferably, guide openings 29, 29' are provided for guiding 28'.

These pair of guide openings 29, 29' are formed symmetrically with respect to a straight line connecting the respective centers of the rotating shaft 3 and the supporting shaft 8, and when the swinging member 4 swings,
A guide edge that guides the pair of guide pins 28 and 28', respectively, without elastically deforming the connecting arm on the swinging side, for example, 18, and elastically deforming the connecting arm on the anti-swinging side, for example, 18' inward. 29a,
29b, 29'a, 29'b, and in the neutral position of the swinging member 4, the two guide edges 29a and 29b, 2
A pair of guide pins 28 and 28' are respectively locked to the stepped portions formed between 9'a and 29'b.

In this case, each guide edge 29a, 29b, 29'
The lengths of a and 29'b are set so that at least two or more increments can be carried out. The guide of the connecting arms 18, 18' by the guide pins 28, 28' and the guide openings 29, 29' helps to smooth the swinging of the swinging member 4.

Next, the embodiment shown in FIG. 3 will be described.

As shown in FIG. 3, in this embodiment, two guide edges 31a, 31b, 31'a of guide openings 31, 31' guide guide pins 28, 28' of a pair of connecting arms 18, 18', respectively. , 31'b,
Stopper portions 32, 32' are provided in the middle of the guide edges 31b, 31'b which guide the guide pins on the anti-swinging side while elastically deforming them, which are concave portions into which the guide pins 28, 28' can fall.

These stopper parts 32, 32' constitute a kind of moderation mechanism in cooperation with the guide pins 28, 28' and the guide edges 31b, 31'b. ', once the operating member 5 is locked in the direction of the hour hand,
Further swinging of the swinging member 4 is prevented and one increment feeding is completed.

Also, the guide pin 28' is connected to the stopper portion 3.
2' in the swing direction, the guide pin 28' passes over the stopper portion 32' and touches the swing side end of the guide edge 31'b. until it is locked in
The swinging member 4 swings in the counterclockwise direction, thereby feeding the rotating member 2 in increments of two or more.

On the other hand, in order to automatically return the operating member 5 and therefore the swinging member 4 to the neutral position after the operation member 5 is operated in increments, a moderating pin 33 is provided between the cover 10 and the operating member 5. Pair of left and right inclined cams 3
A moderation mechanism 35 for automatic return is formed by the inclined cam member 34 consisting of 4a and 34'a.

The moderation pin 33 is elastically supported by a coil spring 37 in a fitting cylinder 36 having a center axis that coincides with a straight line connecting the centers of the rotating shaft 3 of the swinging member 4 and the supporting shaft 8 of the operating member 5. The operating member 5 is pushed,
When the pull is operated in either direction, the moderation pin 33 is pushed by the spring force of the coil spring 37, and the operating member 5 is automatically returned to its original position. In this case, the spring force of the coil spring 37 is set to a value that can exceed the locking force of the guide pin 28 or 28' of the stopper part 32 or 32' and automatically return the swinging member 4 and the operating member 5. .

Furthermore, when the operating member 5 is fully stroked with a large operating force, the inclined cam 34a or 34'a pushes the moderation pin 33 into the coil spring 37.
can no longer be compressed, thereby preventing further operation of the operating member 5.

In each of the above embodiments, the notch feed mechanism has been described as having a structure in which the rotating member and the swinging member shown in FIG. 1 are coaxial, but the present invention is not limited to this.

That is, the present invention can be applied to any type of increment feeding device that feeds a rotary member in increments by swinging a swinging member that can automatically return to a predetermined position. Needless to say, the present invention can also be applied to a structure in which the components are integrally formed.

As is clear from the above description, according to the present invention, by adjusting the operating force on the swinging member, it is possible to selectively perform one-time increment feeding and two or more increment feedings. The operability of the notch feeding device can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory horizontal cross-sectional plan view of a cover showing the notching feed mechanism used in the embodiment of the present invention, and FIG. 2 is an illustration of the notching feeding device showing the first embodiment of the present invention. Partial sectional plan view, 3rd
The figure is a partially sectional plan view similar to FIG. 2 showing a second embodiment of the invention. 2... Rotating member, 4... Swinging member, 5... Operating member,
22... Coil spring, 23... Moderation pin, 25, 2
5'...Slope cam, 26, 26'...Stopper, 27,
27'... Plane cam, 28, 28'... Guide pin, 3
1, 31'... Guide opening, 32, 32'... Stopper, 3... Moderation pin, 34... Slope cam member.

Claims (1)

[Claims] 1. In an increment feeding device that feeds a rotating member in increments by operating a swinging member that automatically returns to a predetermined position, the swinging member is moved with an operating load smaller than a predetermined load. a first stroke limiting mechanism that limits the swinging stroke of the swinging member to a first stroke when the swinging member is operated; and a second stroke limiting mechanism that limits the swinging stroke of the swinging member to a second stroke larger than the first stroke, and the swinging stroke of the swinging member is changed according to the operating load. A notch feeding device characterized by the following. 2. In the tick feed device according to claim 1, the first stroke limiting mechanism comprises a moderation member biased by a spring and a swinging stroke amount when the swinging member swings from the predetermined position. a slope cam member that increases the spring force on the moderation member in approximately proportion to , and a stopper provided on the slope cam member that temporarily stops the moderation member when the swinging member is swung to the first stroke. An incision feeding device characterized by: 3. In the increment feeding device according to claim 2, the second stroke limiting mechanism is constituted by a cam surface formed continuously with the stopper of the inclined cam member and the moderation member. A notch feeding device characterized by: 4. In the increment feeding device according to claim 1, the first stroke limiting mechanism includes an elastic member that moves in conjunction with the swinging of the swinging member, and guides the elastic member to elastically deform when the swinging member swings. A notching feed device comprising a guide member and a stopper provided on the guide member so as to temporarily lock the elastic member when the swing member is swung by a first stroke.