JP3184931B2 - Cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a plurality of pin tumblers (including a magnet pin tumbler) are arranged around a lock shaft inserted into a center hole of a lock body along the axial direction. Related to cylinder locks.

[0002]

2. Description of the Related Art As a pin tumbler type cylinder lock, a substantially cylindrical lock body is mounted in a cylindrical case.
A lock shaft having a flange portion is inserted into the center hole of the lock body, and a plurality of pin holes are formed around the inserted lock shaft, that is, in the flange portion and the lock body, along the axial direction of the lock shaft,
Cylinder locks having a structure in which a plurality of pin tumblers or magnet pin tumblers are inserted into those pin holes together with a coil spring are used in the field of game machines and the like.

[0003]

Since the lock body of such a cylinder lock is usually formed into a predetermined shape by die casting of an aluminum alloy, there has been a problem that the manufacturing cost is increased. For this reason, in order to reduce the manufacturing cost, the lock main body is formed using a synthetic resin having relatively high strength.

However, when a cylinder lock using a lock body made of a synthetic resin is used in a locking device such as a frequently used pachinko machine or the like, a breakage accident or the like may occur at the abutting surface between the lock body and the lock shaft flange. There is a problem that is likely to occur.

That is, this type of cylinder lock is unlocked when the tip position of the pin tumbler or magnet pin tumbler, or the contact surface between the drive pin and the code pin coincides with the abutting surface between the lock body and the flange. And the rotation of the lock shaft becomes possible. However, if the key is not inserted properly or if an unauthorized key is used to unlock the pin, the end of the pin tumbler bites between the pin hole of the lock body and the pin hole of the flange. Therefore, there is a problem that the lock body is damaged.

The present invention has been made in view of the above points, and provides a cylinder lock which can be manufactured at a low cost by using a synthetic resin, and which can prevent breakage and extend the life of the product. The purpose is to:

[0007]

In order to achieve the above object, a cylinder lock according to the present invention is provided with a cylindrical case, a lock shaft hole which is inserted into the case, is provided in the center axis direction, and is provided around the periphery thereof. A lock body provided with a plurality of pin holes in the axial direction, a lock portion inserted into the lock shaft hole, a flange portion provided at an upper portion, and a lower surface of the flange portion arranged to match the upper surface of the lock body; In a cylinder lock provided with a pin tumbler to be inserted, in the invention according to claim 1 , the lock main body is a metal die cast.
The upper lock body is formed from the upper lock body and the lower lock body made of synthetic resin, and a groove is formed in the outer peripheral thickness direction of the upper lock body.
Is lower lock body is insert molded by a synthetic resin upper lock body as an insert, if the time of the insert molding
The synthetic resin enters the groove of the upper lock body and the upper lock body and lower lock
The main body is connected, and the lower part of the lower lock main body is
The locking part which is locked to the stop hole is protrudingly provided.
I do. In the invention according to claim 2, the lock body strikes a metal plate.
Upper lock body formed by punching and lower lock body made of synthetic resin
The bent part is folded down at the edge of the upper lock body.
The lower lock body inserts the upper lock body.
Insert molding with synthetic resin
Synthetic resin enters around the bent part of the upper lock body during molding
The upper lock body and the lower lock body are connected
At the lower part, a locking part to be locked in the locking hole of the case protrudes
It is characterized by having been done.

[0008]

[Operation / Effect] In the cylinder lock having such a configuration, since the upper lock main body located at the upper part of the lock main body is made of metal, if the key is not properly inserted, or the key is forcibly unlocked by an incorrect key. In this case, even if the end portion of the pin tumbler bites between the pin hole of the lock body and the pin hole of the flange portion, breakage of the lock body can be prevented. In addition, since the lower lock body is made of synthetic resin and is insert-molded with the upper lock body as an insert, the lock body can be manufactured easily and inexpensively as compared with a case where all of the lock body is manufactured by metal die casting. it can. In addition, if the upper lock body is formed by punching a metal plate, it can be manufactured more easily and inexpensively.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a front view, a plan view, and a side view of the cylinder lock. Reference numeral 1 denotes a cylindrical case, and a flange-shaped mounting portion 2
And a keyhole 3 is formed at the tip of the case 1. A key insertion space for inserting a key is formed in an upper part of the case 1 around a tip end of a lock shaft described later.
Locking holes 1a for locking locking portions 4a of the lock body 4 described later are formed in lower portions of both sides of the case 1.

The lock body 4 is composed of an upper lock body 5 and a lower lock body 6, as shown in FIG. 7. The upper lock body 5 is formed by die-casting an aluminum alloy.
The upper lock body 5 is put into a molding die as an insert, and is integrally molded by insert molding with a synthetic resin.

As shown in FIG. 8, the die lock upper lock body 5 is provided with a lock shaft hole 5a for inserting a lock shaft in the center of a disk shape, and a plurality of (here, six) lock shaft holes 5a are provided around the hole. The pin hole 5b is provided in the thickness direction. Further, two pairs of grooves 5c and 5d are provided around the periphery in the thickness direction. The pair of wide grooves 5c is a groove for introducing a resin at the time of molding the synthetic resin, and the narrow groove 5d is for angle positioning, and a rib or the like protruding into the case 1 at the time of assembly is used. It is inserted.

The lower lock body 6 is a cylindrical part formed of a synthetic resin, has a lock shaft hole formed at the center thereof, and communicates with a vertical groove 5 d provided on the outer periphery of the upper lock body 5. A groove 6a is formed, and the above-mentioned two locking portions 4a are protruded from the lower portion. The lower tablet body 6 is insert-molded by putting the upper tablet body 5 in a predetermined mold and injecting a synthetic resin material into a cavity formed in the mold. The synthetic resin also enters the wide groove 5c of the lock main body 5, and the upper lock main body 5 and the lower lock main body 6 are integrally formed so as to be firmly connected.

As described above, although the upper lock body 5 of the lock body 4 is formed by die-casting a metal such as an aluminum alloy, the lower lock body 6 is insert-molded with a synthetic resin. Rather than molding by die casting,
It can be manufactured at low cost.

The lock shaft 7 is formed by providing a flange portion 7a on the upper portion of the shaft, and on the lower surface of the flange portion 7a, six positions are formed at positions corresponding to the pin holes 5b formed on the upper surface of the lock body 4. A pin hole is formed.

When a cylinder lock is manufactured by assembling the components, a magnet pin tumbler 8 and a coil spring 9 are inserted into each pin hole 5b of the lock body 4, and the lock shaft 7 is attached to the lock body 4 from above.
The pin hole 5b is closed by the flange portion 7a. In this state, the lock body 4 and the lock shaft 7 are inserted into the case 1, and the locking portions 4 a of the lock body 4 are locked in the locking holes 1 a of the case 1, thus completing the assembly.

When the lock body 4 is inserted into the case 1, a protrusion such as a rib or a pin protruding from the inside of the case 1 fits into the groove 5 d on the lock body side, and is positioned at a predetermined position (angle) of the case 1. The lock body 4 can be assembled. The lock body 4 has a locking portion 4a.
Can be attached to a predetermined position in the case 1 by being inserted into the locking hole 1a. However, if necessary, a pin or a screw can be inserted from the outer periphery of the case 1 to fix them.

In such a cylinder lock, when locking and unlocking, a predetermined key is inserted into the key insertion space in the upper part of the case 1 from the key hole 3, whereby a magnet pin embedded in the tip of the key is used. The magnet pin tumbler 8 provided on the lock body 5 is pushed down, and its tip position is aligned with the abutting surface between the lower surface of the lock shaft flange and the upper surface of the lock body, and is unlocked. At this time, if the magnet pin tumbler 8 does not return to the lock body side, the pin may bite into the pin hole, but since the upper lock body 5 of the lock body 4 is made of metal, breakage can be prevented. .

FIGS. 9 to 13 show another embodiment, in which a lock body 14 of this cylinder lock is formed of an upper lock body 15 made of a metal plate and a lower lock body 16 made of synthetic resin. The upper lock body 15 is formed by punching a metal plate into a disk shape, and has a lock shaft 15a in the center and six pin holes 1 around the lock shaft 15a.
5b is formed, and a groove 15d is formed at two locations on the periphery.
Further, a bent portion 15c is formed at one portion of the edge by bending downward. Since the upper lock body 15 can be formed by punching a metal plate, the upper lock body 15 can be manufactured more easily and inexpensively than when it is formed by die casting.

The lower lock body 16 is integrally insert-molded with a synthetic resin below the upper lock body 15. Similarly to the above, the lower lock main body 16 formed into a cylindrical shape by a synthetic resin has a lock shaft hole formed at the center thereof, and
Pin holes communicating with the individual pin holes 15b are formed at a predetermined depth. Further, a vertical groove 1 provided on the outer periphery of the upper lock body 15 is provided.
A groove 16a communicating with 5d is also formed in the lower lock main body 16, and two locking portions 14a protrude from the lower portion.

At the time of molding, the lower tablet main body 16 is inserted into a predetermined molding die by inserting the upper tablet main body 15 and injecting a synthetic resin material into a cavity formed in the molding die. At the time of molding, the synthetic resin also enters around the bent portion 15c of the upper lock main body 5, and the upper lock main body 15 and the lower lock main body 16 are firmly connected.

As described above, since the upper lock body 15 of the lock body 14 is formed from a metal plate and the lower lock body 6 is insert-molded with a synthetic resin, the entire lock body is formed by die casting. It is much easier and cheaper to manufacture.

As described above, the cylinder lock having the lock body 14 having the above-mentioned structure is similar to the cylinder lock described above.
, A magnet pin tumbler 8 and a coil spring 9 are put in, and the lock shaft 7 is inserted through the lock shaft hole 15a of the lock body 14 from above.
The top of the pin hole 15b is closed by the flange portion 7a. In this state, the lock body 14 and the lock shaft 7 are inserted into the case 1, and the locking portion 14 a of the lock body 14 is
a, and assemble.

When locking or unlocking the cylinder lock, a predetermined key is inserted into the key insertion space in the upper part of the case 1 through the key hole 3, whereby a magnet pin tumbler is formed by the magnet pin embedded in the tip of the key. The lock is pushed down, and the tip position is aligned with the abutting surface of the lower surface of the lock shaft flange portion and the upper surface of the lock body, and the lock is released. At this time, if the magnet pin tumbler 8 has not returned to the lock body side, the pin may bite into the pin hole. However, since the upper lock body 15 of the lock body 14 is made of metal, breakage can be prevented. .

Although the magnet pin tumbler 8 is used in the above embodiment, the present invention can be applied to a cylinder lock using a normal pin tumbler. In this case, a pin hole to be drilled in the flange portion of the lock shaft is vertically penetrated, and a cord pin is inserted into the key hole with its upper part protruding into the key insertion portion. What is necessary is just to insert a drive pin and a coil spring.

[Brief description of the drawings]

FIG. 1 is a front view of a cylinder lock according to an embodiment of the present invention.

FIG. 2 is a plan view of the cylinder lock.

FIG. 3 is a right side view of the cylinder lock.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a sectional view taken along line VV of FIG. 2;

FIG. 6 is a perspective view of the lock body.

7A is a plan view of the lock body, FIG. 7B is a front view thereof, and FIG. 7C is a right side view thereof.

8A is a plan view of an upper lock main body, FIG. 8B is a cross-sectional view thereof, and FIG. 8C is a right side view thereof.

FIG. 9 is a sectional view of a cylinder lock according to another embodiment.

FIG. 10 is a perspective view of a lock body of the cylinder lock.

FIG. 11A is a plan view of a lock body of the cylinder lock,
(B) is a front view of the lock body, and (C) is a right side view of the lock body.

12A is a plan view of the upper lock main body, and FIG. 12B is a front view thereof.

FIG. 13 is a sectional view of a cylinder lock according to another embodiment.

[Explanation of symbols]

 1-Case 4-Lock body 5-Upper lock body 6-Lower lock body 7-Lock shaft 8-Magnet pin tumbler

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A Sho 57-84395 (JP, U) JP-A 64-18263 (JP, U) JP-A 5-46621 (JP, U) JP-A 6-86 62152 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05B 27/00 E05B 15/00 E05B 15/16 E05B 27/04

Claims (2)

(57) [Claims] 1. A lock case, comprising: a cylindrical case; a lock body inserted into the case, a lock shaft hole provided in a central axial direction, and a plurality of pin holes provided axially around the lock shaft hole; , A flange provided on the upper part, a lock shaft arranged so that the lower surface of the flange is aligned with the upper surface of the lock body, and a pin tumbler inserted into the pin hole, a cylinder lock comprising: The lock body is formed of an upper lock body formed of metal die casting and a lower lock body made of synthetic resin , a groove is formed in a thickness direction of an outer peripheral portion of the upper lock body, and the lower lock body is formed of the upper lock. The main body is insert-molded with a synthetic resin as an insert.
The upper lock body and the lower lock body enter the groove of the lock body and
At the lower part of the lower lock body,
A cylinder lock, wherein a locking portion to be locked is projected . 2. A case having a cylindrical case and a lock shaft hole which is inserted into the case and is provided in a central axial direction.
Both have a lock body with a plurality of pin holes provided around it in the axial direction.
And a flange portion is provided at an upper portion thereof, and is inserted into the lock shaft hole.
Lock shaft arranged such that the lower surface of the flange portion is aligned with the upper surface of the lock body.
And a pin tumbler inserted into the pin hole , wherein the lock main body is formed by stamping a metal plate.
A lower lock body made of a synthetic resin;
A bent portion is formed by bending the lower portion at the edge of the lower lock.
The main body is made of synthetic resin using the upper lock body as an insert.
Insert molding is performed, and the synthetic resin is
The upper lock body enters around the bent portion of the upper lock body and
And the lower lock main body are connected, and a lower part of the lower lock main body is
The locking portion is locked in the locking hole of the case.
A cylinder lock characterized by the above .