JPS6222991Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a key switch in which an electric switch attached to a cylinder lock is activated by the locking and unlocking operations of the cylinder lock.

A key switch opens and closes the switch in conjunction with the locking and unlocking operations of a cylinder lock, and, for example, one having a structure as shown in FIGS. 1 and 2 is known.

The conventional switch shown in FIGS. 1 and 2 has an attachment part 12 for opening/closing contacts such as a micro switch 13 at the rear end of the outer cylinder 11 of the cylinder lock. A cam 1 for operating the switch 13 is mounted on the axis of the inner cylinder 14 protruding from the
5, and a movable contact piece 13a is provided on the cam 15.
The micro switch 13 is attached to the attachment part 12, and when the inner cylinder 14 is rotated by a duplicate key, the cam 1 is integrated with the inner cylinder 14.
5 rotates and presses the contact piece 13a to open and close the switch 13. Therefore, in the conventional key switch, two or more switches 13 are installed side by side in the axial direction of the outer cylinder 11 in order to open and close a plurality of opening/closing contacts with a single locking/unlocking operation. However, there are drawbacks associated with this structure.

That is, a plurality of micro switches 13 are attached to the attached part 1.
If the cams 15 corresponding to these contact pieces 13a are attached coaxially to the rear end of the inner cylinder 14, each cam 15 may
This may cause variations in the operation of each switch 13 that should be operated, or each cam 15 may
Since each cam 1 is pressed in the same direction by the elastic contact piece 13a of No. 3, this pressing force causes each cam 1 to
5 is tilted within the outer cylinder 11 by the amount of play in its insertion, and as a result, the gaps between each cam 15 and the contact piece 13a of each switch 13 are not uniform. Each actuated contact piece 13
There are drawbacks such as variations in the operation of a.
In addition, in the conventional type, the cam 15 that operates the micro switch 13 is exposed to the outside, so if an unexpected external force is applied during assembly or installation of the key switch, the cam etc. Another disadvantage is that it is easily damaged.

This invention was conceived with the aim of providing a key switch that does not have the drawbacks of the conventional key switches mentioned above.The structure is such that an inner cylinder housed in an outer cylinder can be rotated by inserting a duplicate key. The rear end side of the inner cylinder of the cylinder lock is formed into a rear inner cylinder rod that protrudes to the outside of the outer cylinder by an appropriate amount, and a magnet is embedded in the outer circumferential side of the inner cylinder rod to form two or more rotating bodies forming an annular shape. A gap material such as an insulating sheet is interposed between the rotating bodies, and the position of the magnet is shifted on the circumference and fitted coaxially with the inner cylindrical rod. Two or more cylindrical bodies each having an inner diameter that can be loosely fitted into the body and having magnetically sensitive switches arranged at positions facing the inner wall of the cylindrical body, each of which faces the magnet of the rotating body when the lock is locked or unlocked. It is characterized in that it is fitted onto the rotating body and attached to the rear end surface of the outer cylinder.

Next, an example of implementation of the present invention will be explained with reference to the drawings.

Fig. 3 is a plan sectional view of an example of the key switch of the present invention, in which 1 is an outer cylinder provided with a keyhole 1a on the front and an inner cylinder insertion hole 1b at the rear thereof, and 2 is an inner cylinder loosely inserted into the outer cylinder. The front surface thereof is formed as a front inner cylinder rod 2a that loosely fits into the keyhole 1a, and the rear portion thereof is formed as a rear inner cylinder rod 2b that projects from the rear end surface of the outer cylinder 1 by an appropriate amount. 1A is the rear inner cylinder rod 2
b is inserted into the inner cylinder insertion hole 1b of the outer cylinder 1, and the second outer cylinder 3 is integrated with the outer cylinder 1 by the connecting pin 1c. Cylinder rod 2b
The outer cylinder pin hole 4 is formed on the circumference of the inner cylinder 2 and is formed on the circumference of the inner cylinder 2, and both pin holes 3 and 4 are coaxially formed. Reference numerals 5 and 6 denote outer cylinder pins and inner cylinder pins of different lengths inserted into the pin holes 3 and 4, respectively, and each outer cylinder pin 5 is inserted into the pin hole 3 via a spring 5a. , each inner cylinder pin 6 is always pressed toward the keyhole 1a side, and according to 1 to 6 above, the pin rows are arranged along the axial direction on the circumference of both the inner and outer cylinders. constitutes an example of a cylinder lock.

In the cylinder lock, when no duplicate key is inserted, the tip of each outer cylinder pin 5 is inserted into the inner cylinder pin hole 4 by the repulsive force of the spring 5a, so the inner cylinder 2 cannot rotate. However, when the duplicate key is inserted into the keyhole 1a, the tip side surface of each outer cylinder pin 5 is connected to the inner cylinder 2 and the second
When mating with the joint surface of the outer cylinder 1A, the inner cylinder 2 is rotated by the rotation of the duplicate key, and the rear inner cylinder rod 2b is rotated. A key switch is constructed by adding a switch structure related to the rear inner cylinder rod 2b.

That is, the switch structure of the key switch of the present invention has a fitting hole 21a in the center portion that fits into the rear inner cylinder rod 2b protruding from the rear end of the outer cylinder of the cylinder lock, and a magnet 22 on the outer peripheral wall side. It has an annular rotating body 21 formed by embedding the rotating body 21, and a loose fitting hole 23a having a diameter that allows the rotating body 21 to be loosely fitted therein, and the above-mentioned rotary body 21 is formed at a thin wall or in a position communicating with the inner wall of the hole 23a. A cylindrical body 23 is provided with a mounting seat 23b for a magnetically sensitive switch 24 that operates in response to the magnetic force of the magnet 22. It is constructed by fitting and attaching it to the cylinder lock.

As shown in FIG. 4, the mounting structure of the rotating body 21 and the cylindrical body 23 is such that the rotating body 21 has its fitting hole 21a positioned directly above the magnet 22 embedded therein. is fitted into the rear inner cylindrical rod 2b, and the cylindrical body 23 is freed from the rotary body 21 in such a way that the switch 24 attached thereto is at a position shifted 90 degrees clockwise with respect to the magnet 22. At the same time, the cylinder body 23 is fixed to the rear end of the outer cylinder 1 of the cylinder lock with the screws 25.

In addition, in order to ensure the mounting positional relationship between the rotating body 21 and the cylinder 23, a wall surface of the loose fitting hole 23a of the cylinder 23 is provided with a
The steel ball 23 protrudes inward due to the repulsive force of the spring 23d.
c is buried, and its seat 21b is formed on the wall surface of the rotating body 21 facing the steel ball 23c, and
In order to ensure that the rotating body 21 is rotated and the magnet 22 embedded therein matches the position of the switch 24 of the cylinder body 23, it is spaced 90 degrees counterclockwise from the catch seat 21b. A catch seat 21b' is also formed at the location.

The key switch of the present invention is constructed by incorporating two or more switch structures formed by the above 21 to 27 into a cylinder lock.
A ring-shaped shutter plate 29 and an electrically insulating sheet 30 of the same shape are interposed before and after each switch structure to prevent the function of each switch structure from being inhibited and deteriorated. Tube 2
a stopper mechanism 7 that regulates the rotation angle of the inner cylinder 2 to match the operating range of the inner cylinder 2 with the operating range of the switch structure;
to ensure reliability and stability of operation. In the above embodiment, the switch structure is located at 90° of the rotating body 21.
Since it is designed to be activated by rotation,
The stopper mechanism 7 has a structure that prevents the inner cylinder 2 from rotating more than 90 degrees, that is, as shown in FIG. A structure in which the stopper plate 7c is loosely fitted into a stopper plate 7c formed with a guide notch 7d that rotates within the range of is used.

In the key switch of the present invention, when the duplicate key is inserted into the keyhole 1a and the inner cylinder 2 is rotated 90 degrees, the rotating body 21 also rotates.
Since the rotating body 21 is rotated by 90 degrees, the magnet 22 embedded in the rotating body 21 faces the magnetically sensitive switch 24, and the switch 24 is activated, thereby functioning as a key switch. The rotating body 21 provided with the above-mentioned switch is directly attached by fitting or other means to the rear inner cylinder rod 2b which is formed by protruding from the rear end of the outer cylinder 1 in correspondence with the number of two or more switches to be installed. Since the rotating bodies 21 are attached to each other, installation errors of the rotating body 21 are less likely to occur, and assembly is easy.Furthermore, since the rotating bodies 21 are each covered by the cylindrical body 23, the switch structure itself can be easily assembled. It can be formed compactly, and therefore, unlike conventional products, the switch does not protrude significantly from the outside diameter of the cylinder lock, making it easier to attach the key switch.

Furthermore, since the key switch of the present invention has a structure in which one magnetically sensitive switch corresponds to each rotating body having a magnet, that is, it has a multi-stage structure, the number of installed switches can be increased or decreased as desired. Therefore, in complex switch control circuits, a single cylinder lock can perform the functions of multiple key switches. In addition, since the number of switches is extended in multiple stages to the rear of the outer cylinder, there is no restriction on increasing or decreasing the number of switches as long as the number of switches to be installed is within the outer diameter of the outer cylinder. It is also advantageous in terms of design and production.

However, since the present invention uses a switch that operates in response to magnetic force, such as a silicon Hall effect switch, it has the advantage that dust does not enter the switch from the outside and there are fewer electrical failures. be.

Incidentally, the cylinder lock used in the present invention is not limited to the one used in the embodiments, and it goes without saying that cylinder locks with other structures may be used.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional key switch with a part cut away, Fig. 2 is a rear view thereof, Fig. 3 is a plan sectional view of an example of the key switch of the present invention, and Fig. 4 is taken along line A-A in Fig. 3. The cross-sectional view, FIG. 5, is also a cross-sectional view taken along the line B-B. 1...Outer cylinder, 1A...Second outer cylinder, 2...Inner cylinder,
1a...keyhole, 2b...rear inner cylinder rod, 21...rotating body, 21a...fitting hole of rear inner cylinder rod 2b, 22
... Magnet, 23 ... Cylindrical body, 23a ... Rotating body 21
Loose fitting hole, 23b... Attachment seat, 24... Magnetic sensitive switch, 25... Screw, 7... Stopper mechanism.

Claims (1)

[Scope of utility model registration request] The inner cylinder housed in the outer cylinder can be rotated by inserting a duplicate key.The rear end of the inner cylinder of the cylinder lock is made to protrude out of the outer cylinder in correspondence with the number of switches to be installed, and this protruding part A rear inner cylinder rod, two or more rotating bodies forming an annular shape with magnets embedded in the outer circumferential side of the inner cylinder rod, and a gap material such as an insulating sheet is interposed between the rotating bodies, and the position of the magnets is are fitted to the inner cylinder rod coaxially with each other by being shifted on the circumference, and have an inner diameter that is tightly and loosely fitted to each of these rotating bodies, and a magnetically sensitive switch is provided at a position facing the inner wall thereof. A key switch characterized in that two or more cylindrical bodies are fitted onto the rotary body and attached to the rear end surface of the outer cylinder so that each switch faces a magnet of the rotary body when locking/unlocking. .