JPH01175134A - Encoder with moderation - Google Patents

Abstract

PURPOSE:To improve the precision and reduce the production cost by forming two pulse signal comb teeth contacts and moderation groove sections with an integral contact plate so that both pulse signal circuits are set to the electrical insulation state with each other each time moderation is obtained. CONSTITUTION:A conducting contact plate 22 is insert-formed at the end section of an operation shaft 21. A circular contact 22a, two pulse signal comb teeth contacts 22b and 22c, and moderation groove sections 22d are formed on the contact plate 22, a required electric brush and a moderation clip spring are provided respectively. The comb teeth contacts 22b and 22c are arranged so that the phase of the pulse signal is changed by the rotating direction of the operation shaft 21. When the moderation click spring is coupled with the moderation groove section 22d, circuits connecting the comb teeth contacts 22b and 22c to the circular contact 22a respectively are set to the electrical insulation state with each other. The contact plate can be integrally manufactured, thereby the production cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a rotary moderating encoder used as a data input device for electronic devices such as video and microwave ovens.

2. Description of the Related Art As shown in FIG. 4, a conventional rotary moderation encoder has three metallic sliders 3 to 5 having spring properties that are crimped onto a rotary insulating plate 2 attached to an operating shaft 1. A comb-shaped annular contact as shown in FIG. 5 is formed by printing or etching on the insulating substrate 6 fixed at opposite positions, or by integral molding with an insulating molding material. The metal slider 3.4 is configured to be in sliding contact with the plate 7°8 and the annular current collector plate 9, and the comb-shaped annular liquid one-point plate 7°8
When it comes into contact with each of the protrusions 7a and 8a, a pulse signal is generated. In addition, a rotating insulating plate 2 is provided on the opposite side from the insulating substrate 6.
A moderation plate 10 is connected to a cover 11 attached to the insulating substrate 6 at a position facing the insulating board 6, and a comb-shaped annular contact plate 7, 8
The number of groove portions 10a corresponding to the number of convex portions 7a+8a of
is carved in the circumferential direction, and the locking protrusion 12a of the click spring 12 having spring properties attached to the operating shaft 1 is connected to the moderation plate 10.
Moderation of the operating shaft l is obtained when the operating shaft l engages with the groove portion 10a.

In FIG. 5, T0 to T3 are terminals, terminals T1 and T3 are electrically connected to the comb-shaped annular contact plate 8.7, and terminal T2 is electrically connected to the annular current collector plate 9. ing. Here, the connection portion between the annular current collector plate 9 and the terminal T2 and the connection portion between the comb-shaped annular contact plate 8 and the terminal T1 are provided with insulating coating portions 13a and 13 as shown by hatching in FIG.
b is provided.

Problems to be Solved by the Invention In the above configuration, as shown in FIG. 8a is deviated in a certain direction from the center of the annular ring, and up-counting and down-counting can be determined using terminals 1.8a and 8a as shown in FIG. This is done by detecting the phase difference between the circuit I between the terminals T2 and T12 and the circuit I between the terminals T2 and T3 using a circuit inside the set to which the encoder is attached. However, when the operating shaft 1 is not operated, the locking protrusion 12a of the click spring 12
The state in which the circuit 1.1 is stuck in the groove 10a of Definitely O for
Must be in FF state.

In conventional moderating encoders, the signal generation section and moderation section are not integrated, which tends to cause variations in the timing of the signal and moderation, and when the operating axis 1 is at the moderation point, the signal is always OFF. In order to achieve this, it is necessary to improve the accuracy of parts, and there is a problem that costs cannot be rationalized.

The present invention solves the above-mentioned conventional problems, and aims to provide an inexpensive moderating concoder with excellent accuracy.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a circular contact point and an annular contact point from the center of rotation on the end face opposite to the operation side of the operation shaft that can be operated from the outside. A contact plate made of an electrically conductive material is attached radially to the center of rotation, and the comb-like contacts and moderation grooves for the first and second pulse signals are connected radially to the center of rotation. A third electric brush is provided that slides on the first and second pulse signal comb-tooth contacts and a third electric brush that slides on the circular contact, and engages with the moderation groove. A moderation click spring is provided, and the moderation click spring is 1.
The first and second electric brushes are insulated from each other when the brushes are fitted into the moderation grooves.

Effect With the above configuration, the first and second pulse signal comb-tooth contacts and the moderation groove are constructed of an integrated contact plate, so when the moderation click spring is fitted into the moderation groove, the first and second pulse signal The insulated state between the electric brushes is reliably maintained, which not only easily satisfies the required characteristics of a moderating encoder, but also eliminates the two parts that were previously required: an electrical contact plate and a moderation click plate. can be constructed from a single component, the contact plate attached to the tip of the operating shaft, reducing costs.

Example An embodiment of the present invention will be described below based on the drawings.

Figure @1 is a perspective view of an operating shaft portion showing a main part of an embodiment of the present invention. In FIG. 1, a contact plate 22 is insert-molded on the end face opposite to the operating side of an operating shaft 21 that can be operated from the outside, and this contact plate 22 has a circular contact 22a from the center of rotation and a first contact on the outside thereof. Comb tooth contact 2 for pulse signal
2b, a second pulse signal comb tooth contact 22c on the outside thereof, and moderation grooves 22d on the outer peripheral edge thereof are formed radially with respect to the center of rotation. The circumferential directions of the first and second pulse signal comb-tooth contacts 22b and 22c are substantially the same plane, and the circumferential direction of the moderation groove portion 22d is formed by repeating unevenness.

FIG. 2 is a sectional view showing the overall structure of an embodiment of the present invention. In FIG. 2, the operating shaft 21 is attached to a brush stand 25 via a cover 24 caulked to a bearing 23 that holds it. The brush stand 25 includes first and second electric brushes 27 and 28 that slide into contact with the first and second pulse signal comb-tooth contacts 22b and 22c when the operation shaft 21 is rotated, and circular brushes 27 and 28. A third member slidingly contacts the contact 22a.
An electric brush 26 is provided, and a moderation groove portion 22b is provided.
A moderation click spring 29 is provided which has a locking protrusion 29a that engages with the terminal T, and as shown in FIG.
, T3, the third electric brushes 26 are respectively connected to the terminal T2. Reference numeral 30 denotes a fitting for positioning the tip of the operating shaft 21.

As the operating shaft 21 rotates, the first and second electric brushes 27 and 28 are repeatedly brought into and out of contact with the first and second pulse signal comb contacts 22b and 22c.
Further, the third electric brush 26 is in sliding contact with the circular contact 22a while maintaining conduction, and the locking protrusion 2 of the moderating click spring 29
9. The electric brushes 27 and 28 are configured to be electrically insulated from each other when the electric brushes 27 and 28 are engaged with the moderation groove 22d. Also, when the operating shaft 21 rotates clockwise,
As shown in FIG. 6, the first pulse signal comb contact 22
The pulse signal generated by the circuit I including the second pulse signal comb contact 22c is set to lead in phase than the pulse signal generated by the circuit I including the second pulse signal comb contact 22c. The pulse signal that does is better for the circuit! The phase is set so that it leads the pulse signal generated by the pulse signal.

In this way, the locking protrusion 29a of the moderation click spring 29
When the operating shaft is in a stable position with the terminal T0. Being electrically insulated from T3 is an important characteristic among the required characteristics of an encoder with moderation, and according to the above embodiment, this condition can be fully satisfied.

Effects of the Invention According to the present invention, since the pulse signal comb-tooth contact and the moderation groove are formed of an integrated contact plate, component errors and combination errors can be reduced, and the accuracy of the positional relationship between the two can be improved. Not only does it easily satisfy the required characteristics of a node-containing encoder, but it also eliminates the need for two parts, an electrical contact plate and a moderation click plate, as in the past, and can be configured with a single contact plate, resulting in cost rationalization. The effect is also large.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a perspective view of an operating shaft portion showing essential parts of an embodiment of the present invention, and Fig. 2 is a sectional view showing the overall configuration of an encoder with moderation according to an embodiment of the present invention. , FIGS. 3(a) and 3(b) are a plan view and a partial sectional view of the brush stand of the same moderating encoder, FIG. 4 is a sectional view of the conventional moderating encoder, and FIG. 5 is a diagram of the conventional moderating encoder. The contact plate plan view and FIG. 6 are output signal waveform diagrams of the moderating encoder. 21... Operating shaft, 22... Contact plate, 22a... Circular contact, 22b, 22c... @1 and second pulse signal comb contact, 22d... Moderation groove, 24...
- Cover, 25...Brush stand, 26...Third electric brush, 27, 28...@l and second electric brush, 29...Click spring for moderation. Fig. 1 22 - On the slope, 22j - Kinamibu, 22ν, 22C - 1 stone per die, 2 pals, 4 Bt 9, 1z 2 meters, 1 z 2 m, I, funeral 2 Fig. 24 -, tI nog- Figure 3 (Z) 26, -1 34 奄λ phantom print) 27.2I-・-Kyoulsu・yhihitsuto 2s1begIriKishiYuman, 7-1 Figure 4 Figure 5

Claims (1)

[Claims] 1. On the end face opposite to the operating side of the operating shaft that can be operated from the outside, a first member is arranged in an annular manner with a circular contact point from the center of rotation.
and a contact plate formed of an integral conductive material is attached with a comb tooth contact for a second pulse signal and a moderation groove portion radially with respect to the rotation center, and the first and second pulses are generated by rotation of the operating shaft. First and second electric brushes that slide on the signal comb-tooth contact and a third electric brush that slides on the circular contact are provided, and a moderation brush that engages with the moderation groove to perform moderation. A click spring is provided, and the first moderation click spring is fitted into the moderation groove.
and a moderating encoder configured such that the second electric brush is insulated. 2. The moderation device according to claim 1, wherein a conductive material in which the first and second pulse signal comb contacts, circular contacts, and moderation grooves are integrally formed is formed on the operation shaft by insert molding. encoder.