JPS6341503Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cylinder lock using a plurality of magnets.

Coil springs and magnets are inserted into multiple holes drilled in the plane of the lock body, a lock plate having a lock stem and a collar is fitted into the lock body, and the lock plate and the lock body are engaged with each other by the multiple magnets to form the lock body. Various types of cylinder locks are used to lock the lock plate against rotation. However, during assembly work in the manufacturing process of this type of cylinder lock, it is difficult to position the cylindrical case that covers the outer periphery of the lock body, and the multiple magnets inserted into the holes in the lock body hold the lock plate and case together. When the lock was assembled and fixed by caulking the edge of the case, it would fly out of the hole and attract magnets in other holes, making it difficult to assemble the lock. moreover,
When the tip of the key is inserted into the recess on the front of the cylinder lock and turned in the unlocking direction to unlock the lock, the tip of the key comes off from the recess on the cylinder lock and the key tends to fall, and the tip of the key There was a problem that the engaging part of the lock body was easily damaged by long-term use. moreover,
Conventional cylinder locks generally have a large outer diameter and cannot be installed in narrow installation spaces, and the four magnets used are arranged at equal intervals on the circumference, so the rotation range of the lock shaft is limited. However, there was a problem in that it was small and could not be used in applications that required a wide rotation range.

This invention was made to solve the above problems, and the assembly work during manufacturing can be done easily and efficiently, the key does not come off from the lock body when unlocking, and the lock The purpose of the present invention is to provide a cylinder lock whose shaft has a sufficient rotation range.

Hereinafter, embodiments of this invention will be described based on the drawings.

Figure 1 shows an exploded perspective view of the cylinder lock;
The figure is a bottom view of the lock shaft 1, and Figure 3 is the lock body 2.
shows a bottom view. A flange portion 4 having a recess for inserting a key on the upper surface is fixed to the upper part of the lock shaft 1, and as shown in FIG. A receiving hole 5 is formed shallowly. 6 is this flange part 4
7 is a groove for inserting the protrusion 21 at the tip of the key 20 provided at two places on the upper part of the flange 4. . Further, a key groove 8 that engages with a protrusion 23 in a hole at the center of the tip of the key 20 is bored in the outer peripheral portion of the tip of the lock shaft 1 that projects above the flange portion 4 . The lock body 2 has a through hole 9 for the lock shaft 1 on the central axis.
It is formed in a cylindrical shape with three magnet holes 1 on the top surface.
0 are bored on concentric circles at approximately equal intervals, and a coil spring 11 and a magnet 12 are inserted into these magnet holes 10. When the lock shaft 1 is fitted into the lock main body 2 from above, the three magnet holes 10 respectively face and properly communicate with the receiving holes 5 of the lock shaft 1. Then, the tip of the magnet 12 is fitted into the receiving hole 5 by the biasing force of the coil spring 11. The upper outer periphery of the lock body 2 has a stepped portion 1 that engages with the engaging portion 6 of the flange portion 4 of the lock shaft 1.
3 is formed, and this stepped portion 13 limits the rotation range of the lock shaft 1 to about 110 degrees. Furthermore, the lock body 2
A single protrusion 14 is formed vertically on the side of the case 3, and engages with a groove 18 inside the case 3, which will be described later, to perform a positioning function.

Reference numeral 15 denotes a synthetic resin bush that is fitted into a recess on one side of the lower part of the lock body 2. The tip 15a of the bush 15 slightly protrudes from the outer circumferential surface of the lock body 2, and when assembled, the bush is made of synthetic resin. When the case 3 is put on, the case 3 acts to prevent it from coming off easily due to friction with the bush 15, making the assembly work simple and smooth.

The case 3 is formed into a cylindrical shape that is placed over the lock body 2 and the lock shaft 1, and its upper edge 3a has a small inner diameter to press the flange portion 4 of the lock shaft 1 and prevent the key from coming off. Furthermore, the upper edge 3a
Insert the key 2 in the position corresponding to the groove 7 on the top of the lock shaft 1.
Groove 1 for inserting protrusion 21 on the tip side of 0
6 is formed. In addition, a bent portion 17 is provided at the bottom of the case 3 to protrude downward and is bent inward to fix the case upon completion of assembly, and a protrusion protruding from the outer periphery of the lock body 2 is provided on the inner peripheral surface of the case 3. 1
A groove 18 is provided in the axial direction which engages the groove 4 .

The shape of the bottom of the tip of the key 20 of this cylinder lock is
As shown in FIG. 6, it has a circular shape that can fit into the recess 19 formed on the upper part of the flange portion 4 of the case 3 and the lock shaft 1, and the groove 16 of the case 3 and the groove 7 of the lock shaft 1 are aligned on the center line. A pair of fittable projections 21 are provided on the side of the tip, and a hole 22 is provided at the center of the tip of the key 20 to fit into the tip 1a protruding into the flange 4 of the lock shaft 1. A protrusion 23 is provided on one side of the hole 22 to engage with the keyway 8 of the lock shaft tip 1a. Inside the tip of the key 20 are magnets 24 of the same polarity corresponding to the three magnets 12 slidably inserted into the tip of the lock body 2.
are embedded in positions facing each other when the key 20 is inserted, and when the key 20 is inserted into the fixed position of the recess 19 of the lock body 2, the lock body It acts to push down the magnet 12 inside 2.

Here, to explain the assembly process of the cylinder lock, first, the coil spring 11 and the magnet 12 are respectively inserted into the three magnet holes 10 of the lock body 2, and the lock shaft 1 is inserted into the through hole 9 from above to lock the cylinder lock. The flange portion 4 of the shaft 1 is placed over the lock body 2. In this state, the engaging portion 6 engages with the stepped portion 13 at the top of the lock body 2. Next, insert the bushing 15 into the lower part of the lock body 2,
The tip 15a of the bushing is slightly protruded from the side notch of the lock body 2, and the case 3 is placed over the lock shaft 1 and the lock body 2. At this time, the groove 18 provided on the inner circumferential surface of the case 3 engages with the protrusion 14 provided on the outer circumferential surface of the lock main body 2, thereby positioning the case 3 and the lock main body 2. acts to push the inner circumferential surface of the case 3 that has been inserted to the fixed position, so the folded part 17 of the case 3 is prevented from falling out of the lock body 2.
This assembled state is maintained until the process moves on to bending it inward. Thereafter, with all the parts assembled, the cylinder lock enters the process of bending and fixing the bent part 17 of the case 3. During this process, the case 3 is securely held in a predetermined position with respect to the lock body 2 by the bushing 15. Since the case 3 is stopped at the upper surface of the lock body 2, the case 3 floats a little and a gap is created between the flange part 4 of the lock shaft 1 and the top surface of the lock body 2, and the magnets 12 attract each other due to the slight shaking and the magnet holes 10 It is possible to prevent the problem of the product popping out.

The cylinder lock, which has been assembled by bending the bent part at the bottom of the case 3 inward, has, for example, a cam plate 25, a hook, etc. fixed to the lower end of the lock shaft 1.
Used in various locking devices.

Next, to explain the operation of the cylinder lock, first,
Insert the tip of the key 20 into a predetermined position on the top of the cylinder lock until it hits the flange portion 4. At this time, the protrusion 21 on the outer periphery of the key 20 is guided into the groove 7 of the lock shaft 1, and the protrusion 23 provided in the hole 22 at the center of the key 20 also enters the key groove 8 on the tip 1a of the lock shaft. The guided entry ensures that the key 20 is inserted into the cylinder lock in the correct position. Also, key 20
Since the lock shaft 1 receives the rotational force in a distributed manner between the groove 7 and the key groove 8, the protrusion 21 of the key 20 and the groove of the lock shaft flange 4 that engages with it may deteriorate over a long period of use. Damage and wear can be reduced.

Three magnets 24 of key 20 inserted in place
As a result, a repulsive force is generated in the three magnets 12 on the lock body 2 side, compressing the coil spring 11 and pulling the magnet 12 into the magnet hole 10. The engagement is disengaged and the lock shaft 1 is easily rotated by turning the key 20. The maximum rotation range of the key at this time is 3 times when the magnets 12 and 24 are spaced equally apart.
The rotation range of approximately 110 degrees is approximately 20 degrees larger than when four magnets are used at equal intervals. For locking devices that require a wide rotation range, a cylinder lock equipped with three magnets as in the present invention is suitable.

The key 20 and lock shaft 1 that have been turned to the maximum range stop rotating when the engaging portion 6 of the lock shaft 1 hits the end of the stepped portion 13 of the lock body 2, but at this time, the tip of the key 20 stops rotating. Since the protrusion 21 is placed inside the upper edge 3a of the case 3, the key 20 does not come off at all in this rotational position and can remain locked. This feature is said to be effective in locking devices for pachinko machines and other game machines.

As described above, according to the cylinder lock of this invention, a bushing is attached to the lock body during assembly, and when the case is placed on the lock body, the case is securely temporarily fixed in a fixed position on the lock body due to wear of the bushings.
The case, lock shaft, and lock body can be temporarily assembled to each other in position until the assembly process is completely completed by caulking a portion of the case (bending the folded portion). Therefore, it is possible to prevent the occurrence of defective products due to magnets coming out of magnet holes due to loosening of various parts, etc., and assembly work can be performed easily and efficiently. In addition, since the key and lock shaft are engaged by both the protrusion provided on the outside of the key tip and the protrusion provided in the hole in the center of the key tip, the force exerted by the rotation of the key is dispersed. , it is possible to prevent damage to the engaging part between the key and the lock during long-term use.

[Brief explanation of drawings]

The figures show an embodiment of this invention, in which Figure 1 is an exploded perspective view of a cylinder lock, Figure 2 is a bottom view of the lock shaft, and Figure 3 is a bottom view of the lock shaft.
4 is a longitudinal sectional view of the cylinder lock, FIG. 5 is a partial sectional view of the key, and FIG. 6 is a bottom view of the key. 1...Lock shaft, 2...Lock body, 3...Case, 4
...flange part, 8 ... keyway, 12 ... magnet,
15...butsuyu, 20...key.

Claims (1)

[Scope of Claim for Utility Model Registration] A lock body, in which three magnet holes are provided at equal intervals in the upper part, and a magnet is slidably inserted into each magnet hole along with a coil spring; A cylindrical lock comprising: a lock shaft having a flange portion provided with a receiving hole for the magnet in the upper part; and a cylindrical case that is placed over and fixed over the lock shaft and the lock body, The upper edge of the case is provided with a groove for inserting the protrusion on the side of the tip of the key, and the lower part of the case has a bending part that is bent inward to fix the case to the lock body when assembly is completed. A bushing is fitted into a part of the lock body with its tip slightly protruding from the outer periphery of the lock body so that it is temporarily held by friction when the case is placed on the lock body, and the upper end of the lock shaft. A cylinder having a key groove that engages with a protrusion in the center hole of the key, and a groove in the flange of the lock shaft into which a protrusion on the tip side of the key can fit. Tablet.