JPS6235814Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic key used in automobiles and the like.

Automobiles are equipped with keys such as the engine start key, the fuel tank, the rear gate, and the doors to ensure safety. Generally, these devices are opened and closed by inserting a key into the keyhole, but once you become proficient at opening and closing them, you can insert a thin rod-shaped object such as a screwdriver into the keyhole and open and close them freely without using a key. Less secure as a key. Furthermore, if a foreign object is inserted into the keyhole, it becomes impossible to insert the key and the keyhole becomes unusable.

The purpose of this invention is to provide a magnetic key for automobiles etc. that eliminates these drawbacks.The features are that there is no key hole, the structure is simple, a wide variety of keys can be manufactured, and the duplicate key rate is high. It is a magnetic key that can be lowered.

This invention has a cylindrical outer ring fixed to the panel,
An inner cylinder made of a non-magnetic material that can be engaged with and detached from a protrusion provided on the inner surface of the outer ring in the axial direction and is normally biased toward the engagement side, and is slidably engaged with this inner cylinder only in the axial direction. The shaft core has a locking lever at the lower end, and the lower surface has a protrusion that can be engaged with and detached from the groove cut on the outer periphery of the top of the inner cylinder. A permanent magnet is embedded in a predetermined position on the top of the inner cylinder, and only when the groove of the inner cylinder is fitted into the protrusion of the flange due to magnetic force, the inner cylinder will close to the outer ring. It is characterized by being able to rotate freely.

Embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 is a longitudinal sectional view of the magnetic key body 1 of the present invention, Fig. 2 is a plan view of the inner cylinder 7 taken along line A-A in Fig. 1, and Fig. 3 is a plan view taken along line O-O in Fig. 2. A cross-sectional view along the line, including a side view. Figure 4 shows the line C- in Figure 1.
5 is a plan view of the flange 8 taken along line DD in FIG. 1. FIG. 6 is a front view of a key for operating the key body 1, and FIG. 7 is a side view thereof. Although there is no upper or lower part of the key body 1, for convenience of explanation, the upper part in FIG. 1 will be referred to as the top part, and the lower part will be referred to as the bottom part.

A key body 1 shown in FIG. 1 is attached to a panel 2 of a key mounting part in an automobile with pins 3, with the top thereof facing the outside. A locking lever 5 is fixed to the shaft end 4c on the bottom side of the shaft core 4 built into the key body 1, and by rotating a key 17 shown in FIG. The locking lever 5 rotates together with the shaft core 4, engages with or disengages from a locking piece (not shown), and functions as a key.

As shown in Fig. 1, this key body 1 has a cylindrical outer ring 6, an inner cylinder 7, a shaft core 4, a flange 8, and a spring 9 built in, and is integrally constructed with a top cover 10 and a bottom cover 11. has been done. In the figure, 6a is the outer ring 6
A protrusion extending toward the center provided on the inner circumferential surface near the bottom of the inner cylinder 7, which fits into a groove 7a carved on the outer circumference of the lower part of the inner cylinder 7 as shown in FIG. The length l ₁ is the top upper surface 7c of the inner cylinder 7 and the flange 8.
The distance l ₂ from the lower surface 8a of . Note that the protrusion 6a does not necessarily need to be located at the bottom of the outer ring 6, and its position is not particularly limited as long as it can be engaged with and disengaged from the outer ring 6 by vertical movement of the inner cylinder 7, as will be described later.

The large diameter portion 4a of the shaft core 4 is integrally molded with the aforementioned shaft end 4c, and rotates together with the shaft core 4. A protrusion 4b as shown in FIG. 4 is carved on the outer periphery of the large diameter portion 4a, and is fitted into a groove 7b provided on the inner surface of the inner cylinder 7. The protrusion 4b and the groove 7b are always in a fitted state, but are fitted so as to be slidable in the axial direction so that the inner cylinder 7 can move up and down with respect to the shaft core 4 which does not move in the axial direction.

A coil spring 9 interposed between the flange 8 and the inner cylinder 7 biases the inner cylinder 7 toward the bottom, and FIG. 1 shows a state in which the inner cylinder 7 is located on the bottom side.

As shown in FIGS. 2 and 3, in the center near the top of the inner cylinder 7, a hole 7d through which the shaft core 4 passes, and a recess 7e that enlarges the hole 7d and opens at the top are formed. . The aforementioned spring 9 is inserted into the concave portion 7e and the annular ring 8b protruding from the center of the lower surface 8a of the flange 8, thereby constantly biasing the inner cylinder 7. Note that a spring end fixing groove 7f (FIG. 2) for preventing the spring 9 from rotating is provided in the concave portion 7e.

As shown in FIG. 3, on the outer periphery of the top of the inner cylinder 7, a suitable number of protrusions 13, which are at the same height or slightly lower than the top upper surface 7c, are carved at equal intervals on the periphery, and grooves 14, 15 are formed between them.
is formed. The depth of these grooves is l ₁ and
l ₃ , and l ₃ may be about half of l ₁ .

The grooves 14 and 15 are provided on the lower surface 8a of the flange 8.
Several protrusions 8d to be fitted are implanted with a length _l1 .

The above-mentioned inner cylinder 7 is made of a non-magnetic material such as plastic, and at least a pair of magnets 16, 16a are embedded in the top thereof, distributed to the left and right as shown in FIG. 2 without protruding from the upper surface 7c. has been done.

FIG. 6 shows a key 17 which comes into contact with the top part of FIG. is buried. This end surface 17a is provided with appropriate cutouts 21 and 22 that engage with protrusions 19 and 20 provided on the upper surface 8c of the flange 8 as shown in FIG. It is designed to allow

It should be noted that a portion of the outer periphery of the outer ring 6 has an outwardly protruding anti-rotation piece 6b to prevent rotation relative to the panel 2.

The structure of the key of the present invention has been briefly described above, and next, the detailed structure of each engaging portion will be explained together with the operation of the key.

The notches 21 and 22 of the key 17 are aligned with the protrusions 19 and 20 of the flange 8 of the key body 1. In this state, as shown in FIG.
8, 16a and 18a do not match. key 17
When the magnets are rotated several tens of degrees in the direction of the arrow 23, the magnets overlap, and due to mutual attraction, the inner cylinder 7
rises against the elasticity of the spring 9, and the protrusion 8d on the lower surface of the flange 8 engages with the groove 14 of the inner cylinder. That is, unlike the groove 15, the groove 14 is provided only at the position where the magnet matches. Since this groove 14 has a depth of l ₁ , the groove 7a separates from the projection 6a, and the inner cylinder 7 becomes in a state where it can rotate together with the flange 8.

Further, when the key 17 is rotated, the inner cylinder 7 is rotated, and this rotation causes the shaft center 4 and the locking lever 5 to be rotated to be locked or released.

By selecting the arrangement of the N and S poles of the magnet and the shape and arrangement of the notches and protrusions on the key end surface 17a and the upper surface 8c of the flange 8, it is possible to increase the number of key types.

Although the magnets described above are arranged in pairs, this is useful when the key only needs to be turned in one direction, for example, when the magnets are placed at the shaft end 4c.
If the return spring 24 shown in FIG. 1 is interposed between the locking lever 5 and the outer ring 6, the locking lever 5 always returns to its original state when the key is not operated, so that it only needs to be rotated in one direction.

However, in the case of a key that does not have a return spring 24, it is necessary to rotate in the opposite direction for locking and releasing, and therefore, another pair of magnets 25, 25a shown by broken lines in FIG. The magnets 16 and 16a are arranged in the same position as the previous magnets 16 and 16a. In this case, grooves corresponding to the aforementioned grooves 14 must be provided at the top of the inner cylinder 7 in correspondence with the magnets 25, 25a.

In addition, since it is usually sufficient for the locking lever 5 to be able to rotate approximately 45 degrees back and forth, the locking lever 5 is provided with a rotation stopper 2 to prevent over-rotation.
6 is provided at the fitting portion of the flange 8 of the outer ring 6. 9 and 10 are a plan view showing the rotation stopper 26 of the outer ring 6 and a sectional view taken along the line EE.

By the way, if a key that has no correspondence with the magnet is inserted into the flange 8, the magnets will not match and the attractive force will be extremely weak, and the inner tube 7 will not move against the spring 9, so the key will not operate.

Furthermore, even if the inner cylinder 7 can be pulled up with a strong magnet, the protrusion 8d of the flange is not in the position to be inserted into the groove 14, and on the contrary, it is not in the position to be inserted into the groove ₁₄ . match. Therefore, the inner cylinder 7 cannot be raised to a position where it can rotate, and even if a rotational force is applied to the flange 8, the inner cylinder 7 is locked by the protrusion 6a and does not rotate. Naturally, the locking lever 5 is also immovable, ensuring safety.

As described above, the present invention is a magnetic key that does not have a key hole, and one or two pairs of magnets are appropriately arranged on the upper surface of the inner cylinder inside the outer ring, and are aligned with the pair of magnets on the key side to rotate the inner cylinder. The key rotation is transmitted to the flange, inner cylinder, shaft core, and locking lever by displacing the flange and inner cylinder to make it possible.The structure is simple and compact, and there are many types of keys. , a key with a low duplicate key ratio can be obtained.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of the magnetic key body of the present invention, Figure 2 is a plan view of the inner cylinder taken along line A-A in Figure 1, and Figure 3 is a sectional view taken along line 0-0 in Figure 2. Includes side view. 4 is a sectional view taken along line C-C in FIG. 1, FIG. 5 is a plan view of the flange taken along line DD in FIG. 1, FIG. 6 is a front view of the key, and FIG. 8 is a corresponding view of the magnet, FIG. 9 is a plan view of the outer ring, and FIG. 10 is a sectional view taken along line E--E in FIG. 9. 1...Magnetic key body, 2...Panel, 4
...Axis, 6...Outer ring, 6a...Protrusion, 7...Inner cylinder, 7a...Groove, 8...Flange, 8d...Protrusion, 9...Spring, 14, 15...Groove, 16 ,16
a, 18, 18a, 25, 25a... magnet, 26
...stop.

Claims (1)

[Scope of utility model registration request] A cylindrical outer ring fixed to the panel, an inner cylinder made of a non-magnetic material that is axially removable to a protrusion provided on the inner surface of the outer ring, and is normally biased toward the engagement side. A shaft core that is slidably engaged with the cylinder only in the axial direction and has a locking lever at the lower end, and the outer cylinder has a protrusion on the lower surface that can be engaged with and detached from a groove carved on the outer periphery of the top of the inner cylinder. A key receiving flange that also serves as a cover is fitted into the top of the ring and has a rotation stop for the key on the top surface, and a permanent magnet is buried in a predetermined position on the top of the inner cylinder, and magnetic force causes the protrusion of the flange to hold the inner cylinder. A magnetic key characterized in that the inner cylinder can rotate relative to the outer ring only when the groove is inserted.