JPH0241671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a mechanism for feeding (rotating) a rotating body such as a rotary switch in increments by operating a control lever.

BACKGROUND ART Conventionally, an increment feed mechanism has been developed for rotary switches and the like, in which a rotary body to which a movable contact is attached is fed in increments by operating an operating lever to obtain a desired connection relationship.

As this type of increment feeding mechanism, the applicant of the present application has
Patent application No. 100689 (June 30, 1982)
In the patent application filed in Japan; title of the invention: “Indentation feeding device”),
A swinging member coaxial with the rotation axis of the movable body is provided, and this swinging member is provided with a sending arm and an elastic linking arm, so that when the swinging member is swung by operating the operating lever, the sending arm rotates. We have proposed a knurling feed device in which a rotating body is fed in increments by pushing a connecting arm that engages with inward teeth provided around the body.

Such a tick feed device can have a rotating body and a swinging member having a coaxial structure, and the whole can be designed compactly with a small number of parts, and the swinging radius of the swinging member can be made large. Therefore, it has advantages such as being able to increase the chopping feed force to a large value.

This invention has been made to further improve the above-mentioned type of increment feeding device, and after the rotating member is oscillated to feed the rotating body in increments, the oscillation of the oscillating member is continued to be returned to the neutral position. An object of the present invention is to provide an increment feeding device that can be used for automatic return and can automatically return a swinging member to its neutral position by releasing an operating lever without using a return spring or the like. There is.

Therefore, in this invention, a pair of elastic linking arms provided on the swinging member are used to swing the swinging member in one direction, and the sending-out arm on the swinging side and the linking arm cooperate with each other. When the rotating body is fed in increments, the displacement of the connecting arm on the anti-swinging side in the swinging direction is restricted and it is elastically bent, and the elastic force of this linking arm returns the swinging member to its neutral position. The basic feature is that it is restored.

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

In FIG. 1, 1 is a disc-shaped rotating body that is rotatably supported by a rotating shaft 3 installed on a base plate 2, and 4 is a central bearing on the rotating body 1, which is supported by the rotating shaft 3. A swing member 5 has a swinging member in which a portion 4a is swingably supported, and a middle part 5 is swingably supported by a support shaft 6 installed in the base 2, and one end is swingable in both push and pull directions. Operation unit 5 that can now be operated
This is an operating lever provided with a.

A sector gear 7 centered on a support shaft 6 is provided at the other end of the operating lever 5, and this sector gear 7 meshes with a sector gear 8 centered on a shaft 3 provided on the swinging member 4. By operating the operating lever 5, the swinging member 4 is swung by one tooth.

The swinging member 4 includes a pair of arcuate delivery arms 9, 9' extending symmetrically in the circumferential direction from both ends of the sector gear 8, and a bearing portion 4 at the base of the delivery arms 9, 9'.
a pair of elastic claws 11, 11' extending approximately parallel to the sending arms 9, 9' from between the sending arms 9, 9', and having feeding claws 11, 11' at the tips thereof, which are inserted around the tips of the sending arms 9, 9' with a slight gap. and connecting arms 10, 10'. The feed pawls 11, 11' are adapted to engage with a pair of inward teeth 12, 12' provided along the outer periphery of the rotating body 1 so as to be one step higher than the upper surface of the rotating body 1.

When the operating lever 5 is pushed in the direction of the hour hand from the state shown in FIG. 1 to swing the swinging member 4 in the counterclockwise direction around the shaft 3, the linking arm 10 is The feed pawl 11 engages with one of the inward teeth 12, and in the engaged state is reinforced by the feed arm 9 and pushed in the swinging direction, thereby feeding the rotating body 1 in small increments via the inward teeth 12.

This rotating body 1 has a coil spring 14 in the radial direction.
A fitting portion 15 is provided to elastically support a steel ball 16 radially outward by a coil spring 14.
6 is engaged with inward teeth 18 provided on the inner wall of the arcuate portion 17a of the cover 17 to form a click mechanism.

The above structure is substantially the same as the increment feeding mechanism disclosed in Japanese Patent Application No. 56-100689.

In the embodiment of the present invention, in addition to the above configuration, stopper pins 19, 19' that project upward are provided at the bases of the feed claws 11, 11' of the connecting arms 10, 10', and as shown in FIG. The top wall 17b of the cover 17 is provided with the stopper pins 19, 19'.
Guide holes 20, 20' are provided for guiding the.

As shown in FIG. 4, the guide holes 20, 20' allow a stopper pin, for example 19, on the side of the swinging direction to move in the swinging direction when the swinging member 4 is operated by the operating lever 5. It has arcuate guide edges 20a, 20'a that guide by one tooth, and linear locking edges 20, b20b' that lock the stopper pin on the anti-swinging side, for example 19', in the swinging direction. Ori,
The stopper pin 19' on the anti-swinging side is connected to the locking edge 20'b.
As a result of being locked by , the connecting arm 10' is elastically deformed toward the anti-swinging side.

The return force accompanying the elastic deformation of the connecting arm 10' is
When the operating lever 5 is released, it acts as a force to automatically return the swinging member 4 to its neutral position. That is, when the operating lever 5 is operated to move the rotating body 1 in increments and then the operating lever 5 is released, the locking edge 20'b
Using the stopper pin 19' that is locked to the fulcrum,
The connecting arm 10' applies its reaction force to the swinging member 4 to swing the swinging member 4 in the anti-swinging side to its neutral position, thereby returning the operating lever 5 to the position before starting the operation. to be restored. When the swing member 4 returns to the neutral position, the feed pawl 11 on the swing side
passes over the inwardly directed teeth 12 of the rotating body 1 by one tooth, but in this case, the rotating body 1 is held by the above-mentioned click mechanism, and the rotating body 1 is not rotated.

As is clear from the above description, according to the present invention, the swinging member can be automatically returned to the neutral position by utilizing the elastic deformation of the connecting arm of the swinging member that feeds the rotating body in increments, and the spring etc. It is possible to provide a notch feeding device with good operability without requiring a special return member.

In the above embodiment, the swinging member 4 and the operating lever 5 are separate bodies, but the present invention is not limited to this. The swing member 4 may be integrally formed and the swing member 4 may be swing-operated by operating the operating lever portion thereof.

[Brief explanation of drawings]

Fig. 1 is a plan view of the device showing an embodiment of the present invention with the cover cut along the horizontal plane, Fig. 2 is a plan view of the device similar to Fig. 1 showing the operation of the device, and Fig. 3 is a plan view of the device with the cover removed. FIG. 4 is a plan view showing the neutral position of the device in the installed state, and is a plan view similar to FIG. 3 showing the device when it is being fed in steps. 1...Rotating body, 2...Base, 3...Axis, 4...
... Swinging member, 5... Operation lever, 9, 9'... Delivery arm, 10, 10'... Linking arm, 11, 1
1'...Feeding claw, 17...Cover, 19, 19'...
...Stopper pin, 20, 20'...Guide hole.

Claims (1)

[Claims] 1. A rotating body having inward teeth along its circumferential surface and rotatably attached to a fixed base, and a swinging member that is swingably attached to the fixed base and swings by operating an operating lever; A pair of elastic linking arms extend from the swinging member and have distal ends that can freely engage with the internal teeth, and extend from the swinging member toward the internal teeth and swing when the swinging member is rocked. A pair of rigid sending arms push the tips of the connecting arms in one direction to feed the rotating body in small steps, and the swinging member is swung in one direction and the connecting arm on the side of the swinging direction feeds the rotating body in small steps. When this is done, a guide member is provided that locks the connecting arm on the anti-swinging side to the anti-swinging side and elastically deforms it, and after increment feeding, the swinging member is moved by the elastic force of the connecting arm on the anti-swinging side. A notching feed device characterized by automatically returning to a neutral position.