JPH0535977U - Cylinder lock - Google Patents

Abstract

(57) [Summary] [Purpose] To improve assembly workability and reduce the number of parts,
In addition, the provision of a cylinder lock that can effectively prevent the backlash of the key rotor. A key rotor 2 rotatably fitted in a case 1 is molded from a synthetic resin material, and a step portion is provided at an appropriate position on the outer peripheral portion of the synthetic resin key rotor 2 on the inner peripheral surface side of the case 1. By integrally forming the elastic locking portion 3 that locks with the key rotor 13, the key rotor 2 can be removed from the case 1 without using a conventional stopper plate or compression coil spring that is molded separately from the key rotor. By effectively preventing it, the assembling workability is improved and the number of parts is reduced, and at the same time, the rattling of the key rotor 2 in the case 1 can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a cylinder lock used in, for example, a lock device for an automobile glove box.

[0002]

[Prior Art]

 As a conventional cylinder lock of this type, there is one shown in FIGS. 5 to 10 of JP-A No. 2-112572. Although not specifically shown, the conventional cylinder lock is composed of a cylindrical case and a key rotor, which are separately molded from a metal material, and two parts of the key rotor. 2 to 4 long grooves are formed along with, and an arcuate step is formed in the rear end over a certain range, and the latter key rotor is rotatably fitted in the case. The key insertion hole is formed in the range from the center of the front end face to the inside, and the guide grooves of multiple tumblers and the guide groove of one stopper plate are provided in the diameter direction. A tumbler and a stopper plate are arranged so as to be retractable in each of the guide grooves, and these tumblers and stopper plates are individually biased outward by the spring pressure of a compression coil spring.

In actual use, when the key rotor is rotatably fitted in the cylindrical case and the key is inserted into the insertion hole of the key rotor, the key is inserted into the hole formed in each tumbler. The tumblers are penetrated through and penetrated into the guide groove by the action of the end surface of the key and aligned with a predetermined line, whereby the restraint state by the long groove formed on the inner peripheral surface of the case is released, The key rotor is allowed to rotate in the locking or unlocking direction. With respect to the rotation of the key rotor, the tip of the stopper plate is always locked to the stepped portion formed at the rear end of the case, so that the key rotor is removed from the case while ensuring the rotation of the key rotor. To prevent that.

[0004]

[Problems to be solved by the device]

 However, in the conventional cylinder lock, since a cylindrical case and a key rotor rotatably fitted in the case are formed of a metal material, a plurality of tumblers are, of course, Since one stopper plate must also be molded separately from a metal material and placed in the guide groove with a compression coil spring interposed, the number of parts naturally increases and the cylinder lock itself. Had the problem of high costs. Moreover, using a stopper plate not only makes it difficult to assemble the stopper plate itself with a compression coil spring in the guide groove, but also when the key rotor with the metal stopper plate is assembled into the case. However, it was undeniable that the sliding resistance with the metal case increased and the workability deteriorated. Furthermore, even though the stopper plate itself can prevent the key rotor from coming off from the case, it does not have any function of preventing rattling in the key rotor case, so that the clearance between the two is reduced. However, even the rattling of the key rotor could not be effectively prevented.

[0005]

[Means for Solving the Problems]

 The present invention was developed in order to effectively solve the problems of the conventional cylinder lock, and is a cylinder in which a key rotor rotatably fitted in the case is provided with a means for preventing the key rotor from slipping out of the case. Assuming a lock, the key rotor is molded from a synthetic resin material, and an elastic locking portion that locks to a step provided on the inner peripheral surface side of the case is integrated at an appropriate position on the outer peripheral portion of the synthetic resin key rotor. The structure to form is adopted.

[0006]

[Action]

 Therefore, according to the present invention, at least the key rotor rotatably fitted in the case is molded of a synthetic resin material, and the elastic locking portion integrally formed with the synthetic resin key rotor is Since it is elastically locked to the step formed on the inner peripheral surface of the case, the case of the key rotor can be used without using the conventional stopper plate or compression coil spring that was molded separately from the key rotor. Since it can be effectively prevented from slipping off, it is possible to greatly reduce the number of parts and also to effectively prevent rattling of the key rotor.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to one embodiment shown in the drawings. The cylinder lock according to the embodiment has been developed for use in a locking device of an automobile glove box. As shown, the cylindrical case 1 is integrally extended to the resin frame F of the lock device fixed to the lid of the glove box, and the key rotor 2 is rotatably fitted in the case 1. ing. In the figure, reference numeral 21 is an opening / closing knob for opening and closing the lid, and 22 is an operating lever for ensuring a locked state and a released state of the lock device.

In the present embodiment, unlike the prior art, the key rotor 2 itself is molded of a synthetic resin material, and a hollow portion 4 is provided in the outer peripheral portion of the synthetic resin key rotor 2 on the rear end side. It is characterized in that one elastic locking portion 3 is integrally formed with a shape that can be bent inward and locked to a step portion of the case 1 described later. As for the configuration other than this characteristic configuration, as shown in FIG. 2, the key insertion hole 5 is formed in the range from the central portion of the front end surface of the key rotor 2 to the inside as in the conventional case, and the diametrical direction is formed. The guide grooves 6 of the plurality of tumblers 7 are opened, the tumblers 7 are arranged in the respective guide grooves 6 so that the tumblers 7 can be retracted, and the tumblers 7 are individually urged to project outward by the spring pressure of the compression coil springs 8. However, in the present embodiment, the locked state and the unlocked state of the lock device are secured on the rear end face side of the key rotor 2 because of the premise of the lock device of the glove box described above. The eccentric shaft 9 for moving the actuating lever 22 is integrally formed.

On the case 1 side, as shown in FIG. 3, two pairs of four long grooves 11 along the axial direction are formed on the inner peripheral surface of the case 1 through partition walls 12a and 12b. An arcuate step portion (including a concave shape or a convex shape) 13 is positively formed at the end portion.

Therefore, in the present embodiment, the synthetic resin key rotor 2 is integrally extended to the frame F without using a separate molded metal stopper plate or its compression coil spring as in the prior art. When it is fitted in the case 1, the elastic locking portion 3 smoothly moves in the case 1 while bending inward through the empty portion 4, and the step portion 13 formed at the rear end portion of the case 1 is inserted. As shown in FIG. 4, the tip end edge of the elastic locking portion 3 elastically locks to the step portion 13 when passing through, and as a result, there is no tendency for the key rotor 2 to come off from the case 1, and at the same time, It is possible to effectively prevent rattling of the key rotor 2 in the case 1. Moreover, in this embodiment, not only the key rotor 2 itself, but also the frame F of the lock device is integrally molded with the case 1 from the synthetic resin material, so that the key rotor inside the case 1 is not formed. There is an advantage that the fitting work of 2 can be performed very easily.

Therefore, even in the cylinder lock having such a structure, if the key rotor 2 is fitted in the case 1 and the frame F of the lock device is fixed to the lid of the glove box, the lock device of the lock device can be secured. It can be locked and unlocked by key operation. That is, when a key (not shown) is inserted into the insertion hole 5 of the key rotor 2, the key penetrates through the hole 7a formed in each tumbler 7, and each tumbler 7 is inserted into the key. By the action of the end face, it is recessed in the guide groove 6 and aligned with a predetermined line, whereby the restraint state by the long groove 11 formed on the inner peripheral surface of the case 1 is released, and the key rotor 2 is locked in the locking direction. Alternatively, the key rotor 2 is allowed to rotate in the unlocking direction, and when the key rotor 2 is rotated, the elastic locking portion 3 is locked to the step portion 13 on the case 1 side, so that the key rotor 2 is rotated. It is possible to prevent rattling of the key rotor 2 by the elastic locking force of the elastic locking portion 3 as well as the possibility of coming off from 1.

In the above embodiment, as shown in the drawing, a pair of convex portions 10 facing each other is formed on the rear surface side of the enlarged front end portion of the key rotor 2, while one partition wall 12a facing the case 1 is formed. The tip portion is notched so that the convex portions 10 are brought into contact with the side surfaces of the other opposing partition wall 12b to reliably stop the key rotor 2 in the locked position and the unlocked position. However, the present invention is not limited to this, and the key rotor 2 may be configured to be stopped at the locking position and the releasing position due to the relative relationship between the elastic locking portion 3 and the step portion 13. It is optional. Further, in the drawing, one elastic locking portion 3 is formed for the synthetic resin key rotor 2, but the present invention is not limited to this also in this respect. Depending on the required pull-out strength and the like, it is also possible to form two or more elastic locking portions 3 as shown in FIG.

Further, in the embodiment, the cylinder lock used for the locking device of the glove box has been described, but the use is not limited to this, and it can be used for other independent uses. Needless to say, in this case, the case 1 is molded as a single body, and the lock rotor means or the like that replaces the eccentric shaft 9 is attached to the rear end surface side of the key rotor 2.

[0014]

[Effect of the device]

 As described above, according to the present invention, by adopting the above-mentioned configuration, the elastic locking portion formed on the synthetic resin key rotor is locked to the step portion formed on the inner peripheral surface side of the case, so that the key rotor Since it can be effectively prevented from coming off from the case, the conventional stopper plate and its compression coil spring, which were molded separately from the key rotor, are completely unnecessary, improving assembly workability and reducing the number of parts. Was a great expectation. Further, elastically locking the elastic locking portion to the stepped portion of the case makes it possible to effectively prevent backlash in the case of the key rotor.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view showing an application example of a cylinder lock according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view showing a state in which a key rotor is fitted in a case.

FIG. 5 is a side view showing another example of the key rotor.

[Explanation of symbols]

 1 case 2 key rotor 3 elastic locking part 5 key insertion hole 6 guide groove 7 tumbler 8 compression coil spring 13 step

Claims (1)

[Scope of utility model registration request] 1. A cylinder lock comprising a key rotor rotatably fitted in a case, and means for preventing the key rotor from slipping out of the case. The key rotor is formed of a synthetic resin material, and the synthetic resin key rotor is formed. A cylinder lock characterized in that an elastic locking portion that locks with a step provided on the inner peripheral surface side of the case is integrally formed at a proper position on the outer peripheral portion of the cylinder lock.