JPS6240801Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wheel lock used to prevent theft of automobile wheels.

As a wheel lock, a cylinder lock is assembled into a cylindrical case that covers the nut, and this nut is screwed onto one of several bolts that fasten the disk and hub.The case will not lock unless the cylinder lock is unlocked. A material that does not come off the nut is used. However, this device has the disadvantage that dust can enter through the keyhole of the cylinder lock, rendering it unusable within a short period of time. Therefore, a wheel lock (Utility Model Publication No. 53-54011) was developed by incorporating an electronic lock into the case of the nut and sealing its end face, thereby making it durable for long-term use. The present invention is an improved electronic lock incorporated into a wheel lock.

In Fig. 1, reference numeral 1 denotes a disk on which a tire 2 is attached, which is fastened to an axle hub 5 with several sets of bolts 3 and nuts 4, and a protrusion (not shown) on the disk.
It is known to fit a cap 6 on the hub to cover the nut group, remove the cap and remove the nut 4, and then remove the disk 1 from the hub 5 and replace the wheel. The wheel lock R according to the present invention is used for one of several fastening bolts 3.

In the embodiment shown in Figure 2 and below, 7 is a nut for wheel lock (hereinafter simply referred to as nut).
Then, make it slightly longer than the bolt 3 and form an annular ridge 9 pointing inward in the hollow space 8 of this lever part. 10
is a cylindrical case that is placed over the outer half of the nut, covering the hexagonal surface of the nut and protruding outward (to the left).
The inner peripheral surface of a part 11 protruding from the nut 7 is made circular so that a spanner (not shown) cannot be applied to the nut 7 unless the case 10 is removed. 1
2 is a lock body fitted into the protrusion 11 of the case, and is fixed to the case 12 by fitting the notch on the periphery and the protrusion on the inner wall of the case (both not shown) that fits into the notch;
The inner small diameter portion 13 passes through the flange 9 of the nut and fits into the cavity 8, and a dovetail-shaped longitudinal groove 14 is formed on the end face of this portion.
An incision is made in the diametrical direction and the claw piece 15 is inserted. The claw piece 15 has a wedge-shaped claw tip 16 projected by a tension spring 18 interposed between it and the groove end surface, and is hooked onto the flange 9 of the nut to connect the case 10 and the lock body 1.
2 from the nut 7 and push down the notch 17 on the front (right side) of the claw piece, the tip 16 sinks into the vertical groove 14 and the case 10 and the lock body 12 are pushed down.
allow the departure of

The lock body 12 has a round shaft hole 20 bored in its center, and four radial grooves 21 extending in the radial direction on the surface.
Cut the pieces and insert short and small round rod-shaped magnets 22 one by one. 23 is a dish-shaped lock plate, which is fitted into the entrance (right side) of the case 10 and stacked on the surface of the lock body 12;
Cut four radial grooves 24 on the inner surface of this, the same as the radial grooves 21 on the lock body, and fit a part of the magnet 22 into it.
Cut an arc-shaped relief groove 25 extending approximately 1/4 of the way from the middle of the radial groove 24 of the lock plate to the same side (clockwise in Figure 6). 26 is a thick core rod connected to the inner surface of the lock plate 23, which is inserted freely into the shaft hole 20 of the lock body.
The lock pin 27 driven into the lock body is inserted into the annular groove 28 of the core rod to prevent it from coming out, and the stepped surface 29 made by cutting off the lower half of the rear end is engaged with the notch 17 of the lock plate. 23 rotates, the stepped surface 29 at the end of the core pushes down the notch 17 of the claw piece, causing the tip 16 to sink into the vertical groove 14. 30 is a circular key that is placed over the lock plate 23, has a grip 32 with a through hole 31, and a protrusion 33 provided on the periphery of the key, which is inserted into a notch 34 on the periphery of the lock plate 23.
4 short and small magnets 35 are embedded in the circumferential direction to face the connecting part between the radial groove 24 and relief groove 25 bored in the lock plate 23, and mounted on the lock body. The inserted magnets 22 and magnetic poles of the opposite sex are arranged so as to face each other, and different keys are created by changing the number of magnets 22, the direction of the magnetic poles, and the position of the escape groove 25.

One embodiment of the present invention has the above-mentioned configuration, in which the wheel disk 1 and hub 5 are fastened together using several bolts 3 and nuts 4, and the nut 7 is tightly screwed into one of the bolts. Next, the case 10 with the lock body 12 fitted thereon is placed over the nut 7, the slope of the toe 16 protruding from the small diameter portion 13 of the lock body is placed against the outer end of the flange 9, and when the lock body 12 is pushed in with the tip of a finger, the toe 15 sinks into the vertical groove 14 against the spring 18 due to the slope of the toe, and when the small diameter portion 13 is accommodated in the space 8, the claw piece 15 is pushed by the spring 18 to protrude the toe 16, which is then tightened into the nut. Hook it on the edge 9 of the case 1.
0 and the lock body 12 are prevented from coming off from the nut 7. Here, the magnets 22... inserted into the lock body 12 are fitted into both the radial grooves 21 of the lock body and the radial grooves 24 of the lock plate, and each magnet 22... hits the side wall of the radial groove and forms a circle. Since it cannot move in the circumferential direction, rotation of the lock plate 23 is prevented. As a result of the above, the case 10 is in a locked state and covers the hexagonal surface of the nut 7,
Since it is not possible to put a wrench on the nut, theft of the wheel is prevented.

When replacing the wheel, when the recess 33 is engaged with the protrusion 34 and the key 30 is placed over the lock plate 23, the magnets 22 of the lock body are attracted to the magnets 35 of the key and are aligned with the chain line 22' in Fig. 7. Radial groove 24 as shown
Since the magnet 22 of the lock body is aligned with the connection part of the relief groove 25, the magnet 22 of the lock body can be moved toward the relief groove 25. When the key 30 is turned, the lock plate 23 rotates, putting the magnet 22 into the relief groove 25. When the lock plate 23 rotates approximately 80 degrees, the magnet 22 is placed at the far end of the relief groove 25, as shown in FIG. When the tip reaches the end, the stepped surface 29 at the rear end of the core rod 26 pushes down the notch 18 of the claw piece, causing the tip 16 to sink into the vertical groove 14. As a result, the hook between the toe 16 and the ridge 9 in the empty space is disengaged, so that the case 10 can be removed from the nut 7 together with the lock body 12 to expose the hexagonal surface of the nut, and by applying a wrench to this, the nut can be tightened. Remove 7.

Note that when the four magnets 22 are aligned with the connection part 22' between the radial groove 24 and the escape groove 25 during locking, the lock plate 23 can be rotated, but if the positive and negative magnetic poles are arranged alternately, an attractive force acts and the magnets 22... gather at the inner end of each radial groove 21 as shown in FIG.
When the three magnets are aligned with the magnetic poles of the same sex and only one magnet has the magnetic pole of the opposite sex, the three magnets are dispersed to the outer end of the radial groove 21 and one magnet is aligned to the inner end of the radial groove. be attracted. In this way, the four magnets 22 are always located at the inner end or outer end of the radial groove 24 and do not stop at the intermediate portion where the relief groove 25 connects. Therefore, unless a specified key is used, all four magnets cannot be aligned with the connecting part 22', so there is no possibility of unauthorized unlocking, and if the position of the relief groove 25 is changed, the key can be changed, so the key can be changed. It is easy to make.

The above describes one embodiment of the present invention, and the present invention is not limited to this embodiment, and the design can be changed within the gist of the invention. For example, the radial groove 21,
The number of relief grooves 24 and the position of the relief grooves 25 may be changed arbitrarily, and an arcuate relief groove 25 may be provided in the radial groove 21 on the lock body side.

Electronic locks built into conventional wheel locks (Utility Model Publication No. 53-54011, Special Publication No. 54-2726) have the lock body fixed in a case that is placed over a nut, and the toe is hooked onto the rim of the nut to lock the lock. Drill several blind holes on the surface of the main body and insert magnets and springs,
A part of the magnet is inserted into a small hole in the overlapping lock plate to lock the lock, and a magnet is embedded in the key so that the magnetic poles of the same sex face each other at the same position as the magnet in the lock body. When placed on the lock body, the repulsion of the magnetic poles causes the magnet to slip through the small hole in the lock plate, allowing the lock to be unlocked. Since such a wheel lock is used for one of several bolts, a wheel lock that is too long is unsightly, and a heavy wheel lock is undesirable in terms of wheel balance when driving at high speeds. For this reason, it is preferable that the electronic lock for the wheel lock be as short and light as possible.

In addition, with conventional repulsion type electronic locks, when a small magnet is attached to the lock plate and moved, the lock is repelled by the magnet inside the lock body, so the position inside the lock body can be detected from the outside, and as a result, the electronic lock cannot be tampered with. There is a risk that the vehicle may be unlocked and the wheels stolen.

According to the present invention, an electronic lock is incorporated into a wheel lock for preventing theft of a car wheel, and the end surface of the lock is sealed.Radial grooves are cut in both the lock body and the lock plate, and radial grooves are cut in either one of the radial grooves. A relief groove is provided, and a part of the magnet inserted into the radial groove of the lock body is pushed into the radial groove of the lock plate to lock the lock, and the magnet of the lock is inserted into the radial groove of the lock body at the connection between the radial groove and the relief groove. Since the lock is equipped with a suction system that pulls the lock into the unlocked state, the magnetic push spring of conventional repulsion type electronic locks is no longer necessary, and the lock itself can be made shorter and lighter. Since the push spring is omitted, assembly is easy and durable, and by changing the position of the relief groove, it is easy to create different keys.In addition, the magnet inside the lock body can be removed from the outside. Because it is not possible to locate the
It also has the effect of reliably preventing unauthorized unlocking, and is suitable as a wheel lock for preventing wheel theft.

[Brief explanation of the drawing]

The drawings show an embodiment of the wheel lock according to the present invention. Fig. 1 is a front view showing the lock mounted on a wheel, Fig. 2 is an enlarged vertical sectional view of the embodiment, and Fig. 3 is a front view showing the lock mounted on a wheel. is a longitudinal sectional view when unlocked, Figure 4 is a perspective view of the lock body, and Figure 5 is A-A in Figure 2.
Cross-sectional view, Figure 6 is taken from B-B in Figure 2 when the lock is unlocked.
The sectional view, FIG. 7, is a front view of the key. In addition, 1 is the disk, 3 is the bolt, 5 is the hub,
7 is the nut, 8 is the cavity, 9 is the rim, 10 is the case, 11 is the protrusion, 12 is the lock body, 13
15 is the small diameter part, 15 is the claw piece, 16 is the tip, 17 is the notch, 18 is the tension spring, 20 is the shaft hole, 21 and 2
4 is a radial groove, 22 is a magnet, 22' is a connecting part, 23
25 is a lock plate, 25 is a relief groove, 26 is a core rod, 29 is a stepped surface, 30 is a key, and 35 is a magnet.

Claims (1)

[Scope of utility model registration request] Make a nut that is longer than the bolt to be threaded onto one of the several bolts that connect the wheel disc and hub, form an annular ridge pointing inward in the empty space of this part, and cover it with the nut. A lock body whose small diameter part is housed in the cavity of the nut is fitted into the protruding part of the cylindrical case, and a claw piece with a wedge-shaped tip is fitted diametrically into the small diameter part of the lock body to form a tension spring. The toe is made to protrude, and radial grooves are cut on both the surface of the lock body and the inner surface of the lock plate overlaid thereon, and an arc-shaped relief groove is provided on the same side of either radial groove, and the radial groove of the lock body is cut. Insert a part of the magnet inserted into the radial groove of the lock plate to lock it, insert the core rod of the lock plate into the shaft hole of the lock body, and insert the stepped surface of the end of the core into the notch of the claw piece. A magnet is embedded in the key to be engaged with the lock plate so as to face the connecting portion between the radial groove and the relief groove, and so that the magnetic pole of the opposite sex faces the magnet of the lock body. Wheel lock.