JPH0215225Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in a multi-stage rotary changeover switch, such as a pull switch used in a hanging lighting device, which performs switching using a conductive contact plate that rotates in conjunction with the vertical movement of an operating section.

Among household hanging lighting equipment, in lighting equipment that is equipped with two fluorescent lights and can be switched from 2 lights → 1 light → miniature bulb → off by operating a pull switch, a multi-stage rotary changeover switch is generally used for the pull switch. It is being The multi-stage rotary changeover switch includes a stator that converts the vertical movement of the pull switch lever into rotational movement and selects a fixed terminal according to the rotation angle of the conductive contact plate. This multi-stage rotary selector switch is required to be compact and have good operability, but in conventional multi-stage rotary selector switches, the stroke of the lever that moves up and down must be lengthened to improve operability. If the stroke is made longer, the switch becomes larger as a whole, and if the stroke is made shorter, the pulling force on the lever becomes larger, which impairs operability.
Therefore, in order to overcome the above-mentioned drawbacks, the present applicant previously disclosed in Japanese Patent Application Laid-open No. 78328/1983 a switch that satisfies both miniaturization and excellent operability.

However, in the switch previously disclosed in JP-A-58-78328, the locking state between the rotor and the coil spring whose other end is locked to the lever is simply to bring the end face of the coil spring into contact with the plane of the rotor. Therefore, it is not easy to align the center of the coil spring with the center of the rotor during assembly, and even if the center of the coil spring is off the center of rotation of the rotor, the rotor will rotate if you pull the lever, so it will be difficult to align the center of the coil spring with the center of the rotor. There was an inconvenience that it was not possible to determine whether the coil spring and the rotor were properly engaged.

This idea was made in view of the above circumstances,
To provide a multi-stage rotation changeover switch which is small in size and has good operability, has good workability during assembly, and can easily determine whether the locking state between a coil spring and a rotor is good or not after assembly.

To summarize, this idea is to provide a guide cylinder in the rotor that fits into the coil spring when the center of the coil spring is located at the rotation center, and to prevent the coil spring from moving when the center of the coil spring deviates from the rotation center of the rotor. It is characterized by forming an interrupt groove into which a part of the rotor is fitted to prevent rotation of the rotor.

Hereinafter, specific embodiments of this invention will be described with reference to the drawings.

FIG. 1 shows an exploded perspective view of a multi-stage rotary changeover switch which is a specific embodiment of this invention.

In FIG. 1, when the multi-stage rotary changeover switch is assembled, an upper body 1 and a lower body 2 are engaged and integrated to form a component block body that can be fitted into a desired part of a lighting fixture. Approximately flat upper body 1
A lever guide tube 3 for slidingly guiding the vertical movement of a sliding piece of the lever, which will be described later, is provided at a desired portion of the lever. The substantially flat lower body 2 has a lever insertion hole 2a in a portion facing the lever guide tube 3 of the upper body 1.
A ratchet-shaped stator 4 is integrally formed around the center. Conductive plates 5a, 5b, 5c and 5d are fixed to desired portions of the engaging claws 4a of the stator 4. The conductive plate 5d is a common terminal that forms a closed circuit with the conductive plates 5a, 5b, or 5c depending on the rotation angle of the conductive contact plate, which will be described later. It is set long on the side. The approximately T-shaped plate-shaped lever 6 includes
It has two sliding pieces 6a and 6b facing each other at the upper end, and bent pieces 6c and 6d at the lower ends of the sliding pieces, respectively.
is formed. The sliding pieces 6a and 6b are parts that are fitted into guide paths 3a and 3b formed on the inner wall of the lever guide tube 3, respectively, and hold the lever 6 in a slidable manner. The rotor 7, which is generally shaped like a top as a whole, has
It has a through hole 7a for the lever 6 in the center, and slopes 7b and 7c are formed in the periphery to abut the bent pieces 6c and 6d, respectively. The inclined surfaces 7b and 7c bend when the lever 6 is pulled downward.
These parts convert the vertical movement of the lever 6 into a rotational movement in the α direction by sliding with each other.
On the peripheral edge where the inclined surfaces 7b and 7c are not formed, there are fitting portions 7d, which are fitted into locking protrusions 3c and 3d protruding from the inner wall of the lever guide tube 3, respectively, and which regulate the rotation angle. 7e are recessed to face each other. A guide tube 7f is provided on the upper surface, centered around the through hole 7a, which is fitted into the coil spring when the center of the coil spring 8 is located at the rotation center of the rotor 7. The guide tube 7f is provided with opposing grooves 7g and 7h that engage with a portion of the coil spring to prevent rotation of the rotor 7 when the center of the coil spring 8 deviates from the center of rotation of the rotor 7. There is. On the lower surface, a ratchet-shaped engaging pawl 7i that engages with the engaging piece 9a of the conductive contact plate 9 is provided at the periphery, and a guide tube 7i for the spring 10 is provided at the center.
The hollow disc-shaped conductive contact plate 9 has tongue-shaped contacts 9b, 9c that come into contact with the conductive plates 5a, 5b, or 5c provided on the stator 4 depending on the rotation angle, and conductivity is generated via the spring 10. This is for switching conduction between the plate 5d and the conductive plate 5a, 5b or 5c.

FIG. 2 shows a perspective view of the assembled lever 6, rotor 7, and coil spring 8 in the above configuration. Lever 6, rotor 7 and coil spring 8
When assembled correctly, one end of the coil spring 8 is locked to the lever 6, and the other end is locked to the rotor 6 with the guide tube 7f fitted into the coil spring.
In this state, when the lever 6 is fitted into the lever guide cylinder 3 and the upper body 1 and the lower body 2 are engaged and integrated,
The lower end of the lever 6 passes through the insertion hole 2a. When the lever 6 passing through the insertion hole 2a is pulled, the bent pieces 6c and 6d slide on the inclined surfaces 7b and 7c of the rotor 7, respectively, and the rotor 7 rotates smoothly in the α direction.

To assemble the lever 6, rotor 7, and coil spring 8, first insert the coil spring 8 through the lever 6 and lock one end, then insert the rotor 7 through the lever 6 and lock the other end of the coil spring 8. conduct. When the rotor 7 is brought into contact with the other end of the coil spring 8, the guide tube 7f is fitted into the coil spring, so that the center of the coil spring 8 and the center of rotation of the rotor 7 can be easily aligned. That is, since the rotor 7 is provided with the guide tube 7f that is fitted into the coil spring when the center of the coil spring 8 is positioned at the rotation center of the rotor 7, workability during assembly is extremely improved.

Furthermore, if the center of the coil spring 8 is off from the center of rotation of the rotor 7 when the upper body 1 and the lower body 2 are engaged and integrated, a part of the coil spring 8 will fit into the cut-in grooves 7g and 7h. It matches. When the lower end of the coil spring 8 is fitted across the cut-in grooves 7g and 7h, the coil spring 8
Since the outer diameter of the lever 6 is larger, the rotor is twisted and the bent pieces 6c, 6d do not slide on the inclined surfaces 7b, 7c, so that even if the lower part of the lever 6 is pulled, the rotor 7 is not rotated. Not only does it not rotate, but the lever 6 also does not descend smoothly. Therefore, the upper body 1 and the lower body 2
In the state where the two are engaged and integrated, the suitability of the assembly can be confirmed by simply pulling the lever 6 without conducting a continuity test.

As described above, according to this invention, the rotor is provided with a guide tube that is fitted into the coil spring when the center of the coil spring is located at the rotation center of the rotor, so the workability during assembly is extremely high. has.
Furthermore, we have formed an interrupt groove in the guide tube that engages a part of the coil spring and prevents the rotor from rotating when the center of the coil spring deviates from the center of rotation of the rotor, so the rotor will not rotate even if the lever is pulled. Therefore, there is an advantage that it is possible to easily check whether the engagement state between the coil spring and the rotor is good after the assembly is completed.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a multi-stage rotary changeover switch which is a specific embodiment of this invention, and FIG. 2 is a perspective view of the assembled lever, rotor and coil spring. 1... Upper body, 2... Lower body, 6... Lever,
6a, 6b...Sliding piece, 6c, 6d...Bending piece,
7... Rotor, 7b, 7c... Inclined surface, 7f...
Guide cylinder, 7g, 7h... Interrupt groove, 9... Conductive contact plate.

Claims (1)

[Claims for Utility Model Registration] A lever 6 has two sliding pieces 6a and 6b facing each other, and has bent pieces 6c and 6d formed at the lower ends of the sliding pieces, respectively; A lever guide tube 3 for slidingly guiding vertical movement; a rotor 7 having a through hole 7a for the lever and formed with inclined surfaces 7b and 7c that abut the bent pieces, and one end of which is engaged with the lever. a conductive contact plate 9 having a coil spring 8 whose other end is fixed to the rotor; and an engaging piece 9a which engages the rotor when the rotor rotates in one direction; and a plurality of contacts. and a stator 4 in which a fixed terminal that comes into contact with the contactor is selected according to the rotation angle of the conductive contact plate. A guide tube 7f is provided which fits into the coil spring when the coil spring is located at the center of rotation, and when the center of the coil spring deviates from the center of rotation of the rotor, a part of the coil spring is fitted into the guide tube, and the rotor A multi-stage rotation changeover switch characterized in that cut-in grooves 7g and 7h are formed to prevent rotation of the switch.