JPH0145084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation between two reciprocating levers, and relates to an actuation mechanism having a controller that limits the operation of one lever depending on the state of the other lever.

For example, if there are two different function switches A and B, and B is currently in the non-operating state, even if you operate A, it will remain in the non-operating state, but A will not operate until B becomes the operating state. It becomes possible. Furthermore, A
There are cases where a function is required that allows B to be restored while maintaining the state of A when B is in an operating state.

Conventionally, this type of control mechanism could only be controlled by electrical relays. However, to do this electrically requires enough power to drive the relay, and for example, in the case of telephones, using the central power supply for purposes other than making calls would require a configuration that uses commercial power because the driving power is low. . Electrical control consists of a power supply circuit, a control circuit, a relay circuit, etc., and has the drawbacks of high component costs and a large amount of mounting space.

In order to eliminate these drawbacks, the present invention provides an actuation mechanism in which a control cam is actuated so that the state of one lever limits the stroke of a button that drives the other lever. be.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is an embodiment of the mechanism of the present invention, and shows part of the external appearance of two switches A and B. Here, switches A and B are assembled on a frame 1 and mounted on a board 2. An example of something that corresponds to the A switch is the hold switch, and when you want to temporarily put the call on hold during a call, press the hold button 1.
1 upwards in the figure as described later, the working end 11
-1 is a holding switch A, and the holding lever A-1 (first lever)
When the group of contact springs A-3 installed in the frame 1 is actuated in the direction, the transmitting circuit is cut off, and at the same time, the holding tone is transmitted from the holding sound source (not shown), and at the same time, the lever pin A provided on the holding lever A-1 is activated. -1a is locked by lock cam A-4 and maintains that state. If you want to return to the call from this state, operate the hold button (drive button) 11 again. Since the lock cam A-4 is connected to the self-lock release mechanism, the lever pin A-1a will be unlocked and the hold lever will be released. A-1 returns.

An example of a device corresponding to the B switch is a hook switch, and B-1 is a hook lever (second lever), which is shown in the off-hook state and is normally (on-hook) when the weight of the handset is used to return the lever via the hook button 12 to the spring B. -2 is operated in the Y direction with the fulcrum (not shown) on the frame 1 as the rotation axis, and the handset is lifted (off-hook).
Contact spring group B- in which the foot lever B-1 is erected on the frame 1 by the acting force of the lever return spring B-2.
3, and is configured so that a telephone call can be made using a telephone communication circuit (not shown).

Regarding the relationship between the hold switch A and the hook switch B, it is desirable that the line is not seized even if the hold button 11 is operated during on-hook.

Therefore, since the hold switch A has a line capture contact, a means is required to prevent the hold lever A-1 from operating when on-hook. 3 is a control cam that detects the position of the hook lever B-1 when the hook is on and regulates the stroke of the hold button 11;
The structure and operation of the control cam 3 will be explained with reference to FIGS. 2 and 3. Fig. 2a is a plan view showing the main parts, b is a left side view showing the position/operation relationship between the hold button 11, the hold lever A-1, and the control cam 3, and c is a left side view showing the relationship between the positions and operations of the control cam 3.
FIG. 3 is a right side view showing the positional and operational relationship between the control cam 3 and the cam return spring 4 on the frame 1, and FIG. Although not shown in FIG. 1, it is briefly illustrated in FIG. 2b. Hold button 11
is supported by the support shaft 13-1 of the button guide pushbutton 13, and the active end 11-1 of the hold button 11 is located between the switch mounting surface 2a of the board 2 and the driving end A-1a of the hold lever A-1. . The button guide pusher 13 is attached to a through hole 2b of the board 2 through which the holding button 11 passes, by an attaching portion 13-2.
Reference numeral 14 is a main body case, from which the operating section 11-
2, the holding lever A-1 is actuated in the X direction in FIG. 3a of the control cam 3 is a shaft hole into which the support shaft 1a of the frame 1 is inserted, and is formed into an elongated hole.
3b is a contact portion that comes into contact with the drive end B-1a of the hook lever B-1, and 3b-1 is a contact portion that comes into contact with the drive end B-1a of the hook lever B-1;
b-2 is an abutting part when the hook is on, 3c is a regulating part that regulates the stroke of the hold button 11, and the cam return spring 4 causes the abutting part 3b to close to the hook lever B-1.
is involved.

Figures 2a, b, and c show the off-hook state, and when the driving end B-1a of the hook lever B-1 is in contact with the off-hook abutting part 3b-1, the regulating part 3c is held in place. Since it is separated from the shaft part 11-3 of the button 11, a predetermined stroke can be obtained, but when the weight of the handset acts on the hook button 12, the drive end B-1a of the hook lever B-1 is driven in the ○A direction. , when the control cam 3 rotates in the ○ and ○ directions by the amount of the step H, the regulating part 3c moves to the shaft part 11- of the hold button 11.
3 and has an end portion with a thickness h, the hold button 11 cannot obtain a predetermined stroke, making it impossible to capture the line when on-hook. On the other hand, when the hook is turned on from the hold state, the drive end B of the control cam 3 and the hook lever B-1
It is necessary to avoid interference with -1a. At this time, the regulating part 3c is in a position where it comes into contact with the side surface 11-3a of the shaft part 11-3, and since the shaft hole 3a has an elongated hole shape, the regulating part 3c and the shaft part 11-3 come into contact with each other. Part 3
It becomes a rotation fulcrum for the height difference H in b, and the interference is resolved.

In this way, the stroke of the hold button 11 is regulated by the button shaft portion 11-3 and the button guide pushbutton 1.
Since the regulating part 3c is inserted between the hold button 1 and the hold button 1, even if the hold button 11 is pressed, the hold button 1
1. There is no damage to the regulating part 3c, and the control cam 3
Because it has a rotating structure, the load is light, there is no effect of friction, the parts are simple, and the space is small.

As explained above, in the present invention, the control cam that detects on-hook and off-hook times based on the height of the foot lever is inserted below the hold button that drives the hold lever when on-hook to regulate the stroke. The component structure and operation are simple, which greatly contributes to miniaturization and cost reduction.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a part of the external appearance of an embodiment to which the mechanism of the present invention is applied, Fig. 2 a, b, and c are a plan view, left side view, and right side view showing the main parts of the present invention, and Fig. 3 FIG. 2 is a perspective view showing a state in which a frame, a control cam, and a cam return spring are attached according to the present invention. A...Switch (hold switch), A-1...
Holding lever (first lever), A-1a...lever pin,
A-1b...Fully point, A-2...Lever return spring, A
-3...Contact spring group, A-4...Lock cam, B
... switch (foot switch), B-1 ... foot lever (second lever), B-1a ... drive end,
B-2...Lever return spring, B-3...Contact spring group, H...Step, h...Thickness, X, Y...Operating direction, 1...Frame, 1a...Support shaft, 2... ...Substrate, 2a...Switch mounting surface, 2b...Through hole,
3... Control cam, 3a... Shaft hole, 3b... Contact portion, 3b-1... Contact portion during off-hook, 3b-
2...Abutment part during on-hook, 3c...Restriction part,
4... Return spring, 11... Hold button (drive button), 11-1... Working end, 11-2... Operating unit,
11-3...Shaft portion, 11-3a...Side surface, 12...
... Hook button, 13 ... Button guide bush, 13-1 ... Support shaft, 14 ... Main body case.

Claims (1)

[Claims] 1. In an operating mechanism of a first lever and a second lever that reciprocate between a non-operating state and an operating state,
When the second lever is in the non-operating state, the control cam is rotated to limit the stroke of the drive button that drives the first lever, so that the first lever is in the non-operating state. When the second lever is in the operating state, the control cam is restored from the rotating state so as to release the restriction on the stroke of the drive button. The first lever is configured to be able to transition from the inactive state to the operative state, and when the second lever is actuated while the first lever is in the operative state, An operating mechanism characterized in that the control cam is configured so as not to interfere with the recovery operation of the second lever while maintaining the operating state of the first lever.