JPH03666Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field This invention relates to a key switch used in computers and other electronic devices.

(b) Prior Art Key switches used in electronic devices generally rotate an operating shaft by rotating a specific key, and the rotation of this operating shaft activates an actuator such as a micro switch via a cam mechanism. I'm trying to get it to work. As this type of key switch,
Conventionally, a key switch shown in FIGS. 5 and 6, which takes into consideration the rationality of implementation, is known. This key switch 1 allows an eccentric cam 34 provided at the end of the operating shaft 2 to be rotated by a specific rotation operation inserted into the main body of the cylinder lock 3. and,
A sliding plate 6 that reciprocates on a plane perpendicular to the operating shaft 2 is provided, and a plurality of micro switches 7 and 8 are installed on the same plane on which the sliding plate 6 reciprocates, and the eccentric cam 34 is By moving the sliding plate 6 in conjunction with the rotation, actuators 9 and 10 of the micro switches 7 and 8 are actuated.

By the way, this key switch 1 has a vertical elongated hole 36 in the center of the upper part of the main body in which the operating shaft 2 is housed, and the coil spring 21 is inserted into this elongated hole 36. Then, the steel ball 22 held in the groove 38 provided in the coaxial portion 37 of the operating shaft 2 is attached to the coil spring 2.
1, the sliding plate 6 is pressed elastically at all times.
This makes it possible to maintain the actuators 7, 8 operating state at the left or right stop position.

However, although this type of key switch 1 is convenient for keeping the microswitches 7 and 8 in continuous operation, it is inconvenient for use as a switch that provides instantaneous pulse signals to electronic equipment. It was hot. That is, when the key is operated, the copper ball 22 elastically presses the groove 38 of the coaxial portion 37, and the sliding plate 6 continuously presses the actuators 9, 10, so that after the key is rotated. , it is difficult to immediately return to the normal position, and it is difficult to generate an initial pulse or the like using a so-called return function. However, although it is conceivable that the key switch 1 can be operated manually to immediately return the rotated key to its home position, the problem remains that the handling operation is cumbersome and it is not possible to generate appropriate electrical pulses. It had been.

(c) Purpose of the invention This invention was made in view of the above circumstances, and uses a coil spring provided in either the left or right elongated hole drilled in the mounting plate of the micro switch. An object of the present invention is to provide a keyed switch capable of instantaneously returning an actuator of a microswitch to generate a pulse by applying an elastic force to a sliding plate.

(d) Structure and effect of the invention The key switch of this invention is arranged inside the main body of a cylinder lock into which a specific key is inserted, and has an operating shaft that rotates when the key is rotated, and one end of this operating shaft. an operating cam that is provided on the cam and is linked to the rotation of the operating shaft; a sliding plate that makes reciprocating motion on a plane perpendicular to the operating shaft; and a sliding plate that makes reciprocating motion on the same plane that is perpendicular to the operating shaft. In a key switch, in which a plurality of micro switches are attached to and the actuator of the micro switches is operated by sliding a sliding plate, a horizontal elongated hole is provided on both left and right sides of the mounting plate of the micro switch, and the elongated hole By inserting a coil spring into one or both of the above, providing a protrusion on the sliding plate, and bringing the coil spring into contact with the protrusion, the actuator can be operated to return in conjunction with the sliding plate. It is characterized by the following.

When the key switch of this invention is constructed as described above, the sliding plate can be returned to the normal position immediately after being moved, so that the actuator of the micro switch can be activated instantaneously. Therefore, it becomes possible to generate electrical pulses. In addition to the coil spring that presses the operating cam, a coil spring is also provided in the elongated hole of the main body, so the sliding plate can immediately return to its home position in conjunction with the rotation of the operating cam when it returns, allowing the switch to Operation can be made more reliable. Furthermore, since pulses can be generated not only from two microswitches but also by attaching a plurality of microswitches, it is possible to send initialization pulses, etc. to a large number of electronic devices. In addition, since a return function can be added to the normal switch function, complex circuit operations can be performed.

(e) Embodiment Hereinafter, an embodiment in which two microswitches are operated using the key switch of this invention will be described.

Figure 1 is a vertical side view of a key switch that is an embodiment of this invention, Figure 2 is a partially cutaway rear view of the key switch, and Figure 3 is a sliding plate of the key switch. FIG. 3 is a rear view of the removed state.

The key switch 1 of this embodiment includes an operating shaft 2, an operating cam 5, a sliding plate 6, micro switches 7, 8, etc. as main parts. Operation axis 2
is disposed within the main body of the cylinder lock 3, and is configured to rotate by a predetermined angle when a specific key 4 inserted into the cylinder lock 3 is rotated. In addition, micro switches 7 and 8 are installed at the rear end of the cylinder lock.
A mounting plate 15 for mounting is fixed. The operating cam 5 has a tubular coaxial portion 16 into which the operating shaft 2 is inserted. This coaxial part 1
First and second grooves 17, 18 are formed on the circumferential surface of the coil spring 2, which are inserted into horizontal long holes 19, 20 drilled in the mounting plate 15, respectively.
It is possible to hold steel balls 22, 22 which are pressed by the steel balls 1, 21. Note that in the normal position, the first groove portion 17
The steel ball 22 is held in the position. Further, the operating cam 5 is integrally formed with an eccentric shaft portion 23 that protrudes rearward and has a sufficiently small shaft diameter. A recess formed in the coaxial portion 16 of the operating cam 5 is fitted into the rear end of the operating shaft 2 and fixed via a screw, so that it rotates along with the operating shaft 2. The sliding plate 6 is provided with a driven hole 24, which is a long hole in the vertical direction, in the center, and guide holes 25, which are long holes in the horizontal direction, at both ends.
26 is provided, and two depressions 27, 2 are provided at the lower end.
8 is a driven plate for the operation cam 5 formed thereon. This sliding plate 6 is connected to the eccentric shaft portion 23 of the operating cam 5.
The operating cam 5 is fitted into the driven hole 24, and the boss portion of the mounting plate 15 (hidden behind the retaining screws 29, 30 and not shown in the drawing) is fitted into the guide holes 25, 26. It slides left and right as it rotates. . This sliding plate 6 is provided with protrusions 31 and 32 on the surface facing the mounting plate 15. . and,
One protrusion 31 connects the sliding member 14 to the coil spring 13 inserted into one of the horizontal long holes 11 and 12 bored on both left and right sides of the upper part of the mounting plate 15.
, and applies a pressing force to the sliding plate 6 to return it to its normal position. The micro switches 7 and 8 are both mounted on the same surface of the mounting plate 15 facing each other. At this time, the actuators 9 and 10 of the micro switches 7 and 8 are moved into the recesses 27 and 2 of the sliding plate 6 when the operation cam 5 is at the center position (the position shown in FIGS. 2 and 3), respectively.
8 and is placed in an inactive state.

The operation of the key switch 1 of this embodiment constructed as described above will be explained with reference to FIG.

When the operating shaft 2 is rotated counterclockwise with the key 4, the operating cam 5 rotates accordingly, and the eccentric shaft portion 23 moves to the right in the drawing within the driven hole 24 of the sliding plate 6. The moving plate 6 is guided by the guide holes 25 and 26 and slides to the right. Therefore, the pressing portion 33 between the recesses 27 and 28 on the lower end surface of the sliding plate 6 presses the actuator 9 of the micro switch 7 disposed on the right side downward to operate the micro switch 7. At this time, the movement of the protrusion 31 of the sliding plate 6 compresses the coil spring 13 of the elongated hole 11, and the rotation of the operating cam 5 causes the steel ball 2 to move.
2 and 22 press the end face of the coaxial portion 16 to apply elastic force. Next, when you release your hand from the key 4, the operating cam 5 rotates to the left due to the pressing force of the steel balls 22, 22, and at the same time, the compression of the coil spring 13 in the elongated hole 11 is released, causing the protrusion 31 to move to the left. Press to return the sliding plate 6 to the normal position shown in FIG. As a result, the actuator 9 becomes instantaneously activated and generates a pulse. On the other hand, when the operating shaft 2 is rotated clockwise using the key 4, the operating cam 5
rotates and the eccentric shaft portion 23 engages the driven hole 24 of the sliding plate 6.
The sliding plate 6 is guided by the guide holes 25 and 26 and slides to the left in the drawing. At this time, the steel balls 2 are placed in the second grooves 18, 18 of the coaxial portion 16.
2 and 22 are fitted and held, thereby stopping the operating cam 5 and the sliding plate 6. For this reason, the pressing part 3 of the sliding plate 6 is placed on the left side of the micro switch 8.
The micro switch 8 is activated by pressing the actuator 10 downward.

As explained above, in the key switch 1 of this embodiment, the actuator 9 of the micro switch 7 can be returned to the normal position immediately after the sliding plate 6 is moved. can be activated instantly. Therefore, it becomes possible to generate electrical pulses. In addition to the coil springs 22, 22 that press the coaxial portion 16 of the operating cam 5, a coil spring 13 is also provided in the elongated hole 11 of the mounting plate 15, so that the coil spring 13 is linked to the rotation of the operating cam 5 when it returns. The sliding plate 6 can be immediately returned to its normal position, and the switch operation can be made more reliable.

If pulses are to be generated from the two microswitches of this embodiment, coil springs may be inserted into both of the elongated holes, and all grooves of the operating cam may be configured to match the shape of the first groove. .

[Brief explanation of drawings]

Figure 1 is a vertical side view of a key switch that is an embodiment of this invention, Figure 2 is a partially cutaway rear view of the key switch, and Figure 3 is a sliding plate of the key switch. FIG. 4 is a rear view showing the key switch in its operating state; FIG. 5 is a longitudinal side view of a conventional key switch; FIG. 6 is a rear view of the key switch. . 1...key switch, 2...operation axis, 4...
Key, 5... Operation cam, 6... Sliding plate, 7, 8...
Micro switch, 11... long hole, 13... coil spring, 16... coaxial part.

Claims (1)

[Claims for Utility Model Registration] An operating shaft that is disposed inside the main body of a cylinder lock into which a specific key is inserted and rotates when the key is rotated, and an operating shaft that is provided at one end of this operating shaft that is linked to the rotation of the operating shaft. An operating cam that moves, a sliding plate that reciprocates on a plane perpendicular to the operating axis by this operating cam, and a plurality of micro switches installed on the same plane on which this sliding plate makes reciprocating movements. In a key switch that operates the actuators of a plurality of microswitches by sliding a moving plate, horizontal elongated holes are provided on both left and right sides of the mounting plate of the microswitch, and one or both of the elongated holes are provided with a horizontal elongated hole. While the coil spring is inserted, a protrusion is provided on the sliding plate, and by bringing the coil spring into contact with the protrusion, the actuator can be operated to return in conjunction with the sliding plate. A switch with a key.