JPH0444859B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a switch that is used in conjunction with other switch functions by a mechanism mechanism.
The present invention relates to a switch, such as a hold switch on a telephone, which functions in conjunction with a switch on the telephone.

(Prior Art) In recent years, telephones have not only been improved in their basic transmitting and receiving functions, but also various functions have been added for ease of use. For example, a call hold feature allows pressing the hold button while on a call to keep the network circuit open even when the handset is placed in the base set, and maintain the call even when the handset is picked up again.
Conventionally, such additional functions have been realized through purely electrical processing, and a control box equipped with a control circuit such as a relay is installed separately from the telephone set.
The above control circuit functions by operating a specific hold button on the telephone.

(Problems to be Solved by the Invention) However, telephones equipped with the above-mentioned control circuit are very expensive, and therefore cannot be widely used in general households. In order to do this, a separate space must be provided, and since the voltage and current used directly by the telephone are strong, it is not possible to add the above functions directly into the telephone unless the above control circuit is installed. There are other problems.

Therefore, an object of the present invention is to realize the above functions using a mechanism, so that it is small and inexpensive, can be easily installed in a telephone, and can be installed directly in a telephone. The object of the present invention is to provide a switch whose functionality is not inhibited by the voltage and current used.

(Means for Solving the Problems) The present invention is provided with a push button that is slidable between top dead center and bottom dead center, is locked at an intermediate position between both dead centers when pressed, and is unlocked when pressed again. , a rotor for controlling switch contact ON/OFF having a rotational biasing force in the direction of pushing up the button is engaged with the push button for follow-up rotation, and also has a lever rotating base that protrudes into and out of the slide trajectory of the push button. an input lever is provided, which applies a rotational biasing force to the lever in a direction in which the lever rotation base departs from the slide trajectory, and moves the push button to the top dead center position without the lever rotation base engaging the button. This is a position where the button penetrates and protrudes from the slide trajectory, and the lock position is a position where the lever rotation base engages with the button from above and can be pushed down to the bottom dead center position.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of the housing 2 with the lid 1 (shown in FIG. 2) removed to expose the internal mechanism;
In the figure, the housing 2 is shaded to avoid confusion between the housing and the components housed therein, and the diagonal lines do not indicate a cross section. This is shown in Figures 6 and 9.
The same applies to the diagonal lines in the figure.

Four rotor chambers 3, 4, 5, and 6 are formed in the housing 2 from left to right in the drawing, and there is a space between the first rotor chamber 3 and the second rotor chamber 4, and a space between the first rotor chamber 3 and the second rotor chamber 4. Small chambers 7 and 8 are formed between the rotor chamber 4 and the third rotor chamber 5, respectively. Rotors 9, 10, 11, and 12 are coaxially housed and rotatably supported in the rotor chambers 3, 4, 5, and 6, respectively.
The second rotor 10 and the third rotor 11 are used to control on/off of required switch contacts by their rotational operations. The rotor 9 is an on/off control rotor for the call hold function, the second rotor 10 is an on/off control rotor for the speaker reception function, and the third rotor 11 is for the network function. This is a rotor for on/off control. The fourth rotor 12 is rotated in conjunction with the raising and lowering of a handset (not shown), and restricts the rotation of the third rotor 11.

The first rotor 9, the second rotor 10, and the third rotor 11 connect and separate (on/off) the fixed terminal 13 and the movable terminal 14 as shown in FIG. 2 by their rotation.
For this purpose, a cam protrusion 15 is provided on the circumferential surface of the rotor. However, each rotor 9,1
The number of switch contacts that are turned on and off at 0 and 11, and the shape and arrangement of the cam protrusion 15 differ depending on each function, and are individual design matters depending on the electrical equipment that uses the switch. Since it is not the gist of the invention, the explanation will be omitted, but in FIG.
17 is only illustrated.

The first rotor 9, the second rotor 10 and the third rotor 11 each have a helical spring 18 fitted therein,
19 and 20, it is always urged to rotate in one direction, and that direction is the direction of arrow a in FIG. Further, one shaft end of the first rotor 9 is thrust into the first small chamber 7, and the opposing shaft ends of the second rotor 10 and the third rotor 11 are thrust into the second small chamber 8, and these thrust shafts Approximately magatama-shaped pressure receiving tongue pieces 21, 22 at the ends,
23, are integrally provided, and push buttons 24, 25 are provided above the pressure receiving tongues 21, 22, 23 in each of the small chambers 7, 8. The pushbutton 24 installed in the first small room 7 is for holding calls;
The pushbutton 25 installed in the small chamber 8 is for receiving the speaker, and as shown in FIG.
The pressure-receiving tongue 21 is in contact with the base step of the call hold pushbutton 24, and the button is normally held in the solid line position in which it is pushed up to the raised position by the unidirectional rotational biasing force given by the helical spring 18. When the push button 24 is pressed down, the first rotor 9 is forcibly rotated in the opposite direction via the pressure receiving tongue 21. And the first one controls the call hold function.
The rotor 9 opens the call hold circuit (puts the call on hold) by this forced reverse rotation. Pushbutton 25 for speaker reception function and second and third rotors 10 and 11
are in a similar relationship, and as the button is pressed down, these rotors are forcibly rotated in reverse via the pressure-receiving tongues 22 and 23, and the second rotor 10, which controls the speaker receiving function, is forced to perform the speaker receiving function by this forced reverse rotation. The third rotor 11, which controls the network function, opens the network circuit (enabling calls to be made).

Each of the push buttons 24, 25 is equipped with a heart cam mechanism that is locked in the depressed state when pressed down for the first time, and is unlocked when pressed down again. To explain this heart cam mechanism in the same way as the call hold push button 24, it includes a heart cam groove 26 recessed in the side of the button and a lock pin 27 whose tip penetrates into the heart cam groove 26, and the push button 24 is held at the top dead center as shown in FIG. If you push down from a certain initial state,
The lock pin 27 rises relatively and climbs the rising groove part 28 of the heart cam groove 26, and when the push button reaches the bottom dead center, there is a step 29 with respect to the rising groove part 28.
The lock pin 27 falls into the inclined groove part 30 having
0, the one-stage groove engages the approximately U-shaped trough 32 deepened by the step 31, and the push button 2 is pressed.
4 to prevent a return to upward movement. Therefore, this lock position is midway between top dead center and bottom dead center. When pressed down again, the lock pin 27 passes through the valley 32 upwards,
It falls into a descending groove portion 34 having a step 33 with respect to the valley portion, and as the depression is released, the descending groove portion 34
It descends, passes through a step 35, and falls into the original upward groove 28. In addition, each step 29, 31, 3
3 and 35 are for preventing the lock pin 27 from moving backward.

The lock pin 27 is a substantially U-shaped metal fitting, and as shown in FIGS. 4 and 6, the lower end 27a is fitted into the circular hole 37 of the holding plate 36, and the upper end 27b is fitted into the circular arc-shaped elongated hole 38. This retaining plate 36 is attached to the groove 3 of the housing 2 so that it can be rotated from side to side using the fulcrum as a fulcrum.
9 and face the heart cam groove 26, and the lock pin 27 is prevented from coming off by the housing partition wall 2a on the back of the retaining plate.
7b is inserted into the heart cam groove 26. The reason why the lock pin 27 can be rotated in the left and right directions is that the pin must move laterally across the ascending groove 28 and the descending groove 34.

The heart cam mechanism of the push button 25 for speaker reception and network use has a similar structure, but its lock pin 40 is shaft-shaped as shown in FIG. 4, and the third rotor 11 is housed therein. The tip of the rotor chamber 5 is inserted into the heart cam groove (not shown) of the push button 25 through a through hole 41 (FIG. 1) formed in the housing partition wall.
The other end, that is, the pin head 40a, passes through the housing outer wall 2b and comes out to the outside, and the pin head is formed into a T-shape. Lock pin 40
A coil spring 42 for urging the plunger into engagement with the heart cam groove is fitted in the housing, one end of the spring is fixed to the small shaft diameter portion 40b on the tip end side of the pin, and the other end is attached to the housing outer wall 2b. can be applied to. In addition,
When the lock pin 40 performs the above-mentioned locking and unlocking operations, it not only moves in the forward and backward directions but also oscillates in the lateral direction. It is of a comfortable size.

The third rotor 11 has a shaft portion 11a extending therethrough that is inserted into the fourth rotor 12, and the tip of the shaft portion is supported by the housing outer wall 2c constituting the rotor chamber 6, so that it can rotate freely. . The fourth rotor 12 has a helical spring 43 with a rotational biasing force in a direction opposite to that of the third rotor 11, as shown by the arrow b in FIG. and an engagement protrusion 44 for engaging both rotors 11 and 12 with opposing rotational biases.
45 is provided as shown in FIG. 7, and the third rotor 11 is configured to rotate together with the fourth rotor 12 under the force of rotation in the opposite direction.

A first input lever 46 for switching and rotating the fourth rotor 12 in conjunction with raising and lowering the handset is integrally extended to the outside. This input arm 46 is provided with a cam portion 47 that is approximately C-shaped when viewed from above, and this cam portion 47 has a tapered cam surface in the shape of a sideways mountain with tapered surfaces at the top and bottom inside both open ends of the cam portion 47. 47a and 47b are formed so that the T-shaped head 40a of the lock pin 40 is located in the rotation locus of the tapered cam surfaces 47a and 47b when the input lever 48 is rotated. Therefore, as the input lever 46 rotates, the tapered cam surfaces 47a and 47b come into contact with the T-shaped head 40a from above or below, and the lock pin 40 is brought into contact with the tapered cam surfaces 47a and 47b.
The lock pin 40 is slid in the direction of being pulled out from the heart cam groove against the coil spring 42, and the T-shaped head 40a rides over the tapered cam surfaces 47a and 47b, thereby causing the lock pin 40 to move back. Note that pulling out the lock pin 40 causes the push button 25 to be unlocked, and in order to achieve this lock release accurately and quickly with a slight slide of the lock pin 40, as can be seen from the explanation of FIG. It is desirable to add lateral movement such as moving the lock pin 40 from the valley portion 32 toward the descending groove portion 34 side. Therefore, as shown in FIGS. 8 and 9, the tapered cam surfaces 47a and 47b are not arranged at right angles to the lock pin 40, but are arranged at an angle as shown by the arrow c, so that they are moved laterally as the pin comes into contact with the lock pin 40. Let it shake. Furthermore, this swiveling structure makes it possible to release the lock without sliding the lock pin 40.

The push button 24 for holding a call is integrally provided with an arm 48 that protrudes outside the housing 2 when the button is housed in the housing 2, and a position near the protruding arm 48 on the outer surface of the housing 2 is provided. A second input lever 49 that rotates about a support shaft 52 is attached to the input lever 49 . This input lever 49 has a hook claw 5 at its rotation base that can be protruded and removed along the slide trajectory of the arm 48 that moves up and down together with the push button 24.
0 is formed, and the rotation biasing force in the direction in which the hook pawl 50 escapes from the slide trajectory is applied to the helical spring 51.
is applied to the input lever 49 by.

The relationship between the arm 48 and the hook pawl 50 is as follows. When the push button 24 is at the top dead center position, the hook pawl 50 passes through the arm 48 without hitting it and protrudes into the slide trajectory, and the push button is pressed. When the arm 24 is in the locked position, the hook claw 50 engages with the upper surface of the arm 48 and enters the slide trajectory.
The tapered surface 48a provided on the arm 48 is a taper provided to enable the above-mentioned penetration.

As shown in FIG. 3, the base set 53 supports a shaft 54 that rotates in conjunction with the raising and lowering of the handset, and this shaft 54 engages the two input levers 46 and 49 mentioned above from below. When the set lever 55 is guided and the handset is placed on the base set 53, the knob 56 is lowered and the set lever 55 pushes up both input levers 46 and 49, and conversely, when the handset is removed from the base set 53, the knob 56 is lowered. Gattete input lever 4
6 and 49 are configured to be lowered by the urging force of helical springs 43 and 51, respectively. In Figure 3, 5
7 is a group of push buttons for calling oscillation.

Next, to explain the operation, when the handset is placed on the base set 53 and in a non-calling state, both the input levers 46 and 49 linked to the knob 56 are raised, and the fourth rotor 12 is rotated in the opposite direction by the helical spring 43. It is in a rotated position against the biasing force,
Therefore, the third rotor 11 has its own helical spring 19
Since the second rotor 10 is set in the same position as the second rotor 10, the pressure receiving tongues 22 and 23 of the second and third rotors 10 and 11 are held together as shown in FIG. 10A. Push button 25 is pushed up. In this state, the speaker receiving circuit and the network circuit are closed. Further, the hook pawl 50 of the second input lever 49 enters into the sliding locus below the arm 48, and the pressure receiving tongue 21 of the first rotor 9 pushes the push button 24 into the spiral spring 16.
Pushing up with the force of , the call hold circuit is also closed.

Next, when the speaker receiver pushbutton 25 is pushed down, the button is locked by the lock pin 40 and the second and third rotors 1 are pressed down as shown in FIG. 10B.
0 and 11 rotate, the speaker receiver circuit and network circuit are opened, and calling oscillation becomes possible.
In this manner, the network circuit is opened while the handset is placed on the base set 53, so that the calling oscillation operation is a one-handed operation.

Confirm that contact has been made with the other party and that the audio signal is output from the speaker (not shown),
When the handset is picked up, the first input lever 46
The fourth rotor 12 rotates at once due to the force of the helical spring 43 to rotate in the opposite direction. At this time, the tapered cam surfaces 47a and 47b hit the head 40a of the lock pin 40 from above, releasing the lock of the push button 25. Therefore, the button returns to the upper position and the second
The rotor 10 returns to rotation and the speaker receiving circuit is closed. However, since the reverse rotation biasing force of the fourth rotor 12 is set to be strong enough to overcome the unidirectional rotation biasing force of the third rotor 11, the rotation of the fourth rotor 12 causes the engagement protrusion to The third rotor 11, in which the parts 44 and 45 have re-engaged with each other, is in the second position as shown in FIG.
The network circuit does not follow the rotation of the rotor 10, and the network circuit remains open so that a call can be made. Furthermore, the hook pawl 50 of the second input lever 49 moves out of the sliding trajectory of the arm 48 and presses the pushbutton 2 for holding the call.
4 can be pressed down.

If you press the hold button 24 during a call,
When the button is locked, the first rotor 9 rotates to open the call hold circuit as shown in FIG. 10D, and when the handset is placed on the base set 57, the input levers 46 and 49 are raised, as shown in FIG. 10E. As a result of forced reverse rotation of the fourth rotor 12, the third rotor 1
1 is released and the network circuit is closed by the return of the third rotor. On the other hand, the hook pawl 50 of the second input lever 49 enters the sliding trajectory of the arm 48, engages the arm 48 in the lock position (the broken line position in FIG. 7) from above, and presses the push button 24 to the bottom dead center. (Figure 7 chain line position). Therefore,
Although the push button 24 is unlocked, the push button is maintained in the depressed state, so the first rotor 9 does not rotate back and the network circuit maintains the call hold state.

When the handset is picked up again, the input levers 46, 49 are lowered and the fourth rotor 12 causes the third rotor 11 to rotate, opening the network circuit (FIG. 10F) and maintaining the call. Further, the pushbutton 24 is released from the restraint by the hook claw 50 and returns to the upward position, and the call hold circuit is closed.
When the call ends, the handset is set to base 53.
If it is returned to , the initial state shown in FIG. 10A is set.

It goes without saying that when the handset is picked up in response to a call from the other party, the state shown in FIG. 10C is established and only the network circuit is opened.

Further, although the call hold circuit is integrally combined with the network circuit and the speaker receiving circuit in FIGS. 1 and 3, the call hold function portion may be incorporated and operated in an independent housing.

(Effects) As described in detail above, if the switch according to the present invention is used as a call hold switch for a telephone, for example, the call can be put on hold by pressing the pushbutton from the call state, and then the handset can be put on hold by returning the handset to the base set. The rotary base of the input lever presses the button to the bottom dead center to release the lock and maintain the call hold state, so when the handset is picked up again, the call can be secured, but the button is not pressed. The button will automatically return to its initial position.
According to the present invention, which achieves this function using a mechanism, it is inexpensive and can be easily built into the base set, and therefore does not require a large-scale control box as in the past, and can be directly connected to the telephone. We have now been able to add the above functions without being affected by the voltage and current used.

[Brief explanation of drawings]

The drawings show one embodiment of the switch according to the present invention, with Fig. 1 being a plan view of the inside of the housing, Fig. 2 being a sectional view showing the relationship between the rotor and the switch contacts, and Fig. 3 showing the switch as a telephone set. The mechanism diagram in the applied state, Figure 4 is an exploded perspective view of the switch, Figure 5A,
B is an explanatory diagram of the operation of the heart cam groove and lock pin,
Figure 6 is a cross-sectional view around the pushbutton, Figure 7 is a cross-sectional view of the area around the push button.
A front view of the input lever part, Fig. 8 is a perspective view of the fourth rotor part, Fig. 9 is a plan view of the same, and Figs. 10 A to F.
is an operation diagram explaining the function of the switch. 9... Rotor, 24... Push button, 49... Input lever, 50... Hook claw (lever rotation base).

Claims (1)

[Claims] 1. A push button is provided that can slide between top dead center and bottom dead center, is locked at a position between both dead centers by pressing, and is unlocked by pressing again, and this push button is provided with a rotational biasing force in the direction of pushing the button up. A rotor for on/off control of the switch contact is engaged for follow-up rotation, and an input lever having a lever rotation base that protrudes and disengages from the slide locus of the push button is provided on the lever, and the input lever Applying a rotational biasing force in a direction in which the base moves out of the slide trajectory, and setting the top dead center position of the push button to a position where the lever rotation base penetrates the button without engaging the button and protrudes into the slide trajectory. , a switch whose lock position is such that the lever rotation base engages the button from above and can be pushed down to the bottom dead center position.