JPH076405Y2 - Cylinder lock cam plate locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cam plate assembly for a cylinder lock, such as a cylinder lock mounted on a rear door of an automobile, in which a cam plate is locked at a rear end of a rotor of the cylinder lock. Regarding stop device.

(Prior Art) In this type of device, the cam plate is rotated in conjunction with the rotor when the rotor is rotated in the unlocking direction, and the locking of the door lock is performed via a connecting rod connected to the cam plate. The door is unlocked by swinging the lever, and the cam plate stays in that position after pushing the connecting rod so that the rotor does not pull in the connecting rod even if the rotor returns to the original position by the return spring. As described above, the rotor must be freely fittable, so that the rotor can be freely returned to the outer cylinder of the cylinder lock via a return spring, and a small diameter portion is formed at the rear end of the rotor via a step portion. Then
A cam plate is loosely fitted in the small diameter portion to prevent the cam plate from coming off via a snap ring locked to the small diameter portion, and the cam plate is engaged with the engagement piece on the outer periphery of the small diameter portion and the cam plate shaft hole. Further, the cam plate is engaged with the snap plate via a washer having a slight elastic force such as a web washer, which is interposed between the cam plate and the stepped portion of the rotor to prevent the rattling. Has been raped on the side.

(Problems to be solved by the invention) Therefore, there are problems that the number of parts to be assembled with the rotor and the cam plate is increased and that the assembly is complicated.

(Means for Solving the Problems) The present invention is intended to solve the problems, and the means is to enable the rotor to be freely rotatable and returned through a return spring in the outer cylinder of the cylinder lock. A small diameter portion is formed at the rear end of the rotor, a cam plate is loosely fitted to the small diameter portion, and the cam plate is prevented from coming off through a snap ring locked to the small diameter portion. In a cam plate locking device for a cylinder lock in which a small-diameter portion is engaged with the small-diameter portion via an engaging piece on the outer periphery of the small-diameter portion and an engaging piece in the cam plate shaft hole. A ring groove having a groove width extending from the outer position to the inside of the shaft hole of the cam plate is provided to form a neck portion, and the snap ring has a notch groove through which the neck portion can pass, and a hole portion fitted into the neck portion. A pair of twisted sheets in opposite directions The snap ring is formed as an elastic piece, and one leg of the snap ring elastically contacts the side surface of the ring groove and the other leg elastically contacts the cam plate to elastically move the cam plate to the outer cylinder end surface of the cylinder lock. Characterized by being in contact.

(Operation) As described above, since the pair of legs of the snap ring are twisted in opposite directions in the plate thickness direction, by mounting the snap ring in the ring groove provided in the small diameter portion of the rotor, the cam plate has a small diameter. The cam plate is prevented from coming off, and the cam plate is elastically contacted with the end surface of the outer cylinder of the cylinder lock to prevent rattling.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
(1) shows an outer cylinder of a cylinder lock, and a rotor (2) fitted in the outer cylinder (1) is provided so as to be rotatable and returnable via a return spring (3), and its end side Outer cylinder (1)
A small diameter portion (2a) protruding from the stepped portion (4) is provided so that the cam plate (5) is loosely fitted. The small diameter portion (2a) is formed with engagement pieces (8) protruding to both side surfaces, and the cam plate (5) is formed on the peripheral surface of the small diameter portion (2a) including the engagement pieces (8). ), A ring groove (6) having a groove width extending inside and outside is formed to form a neck portion (6a). The cam plate (5) is provided with a shaft hole (9a) in which an engaging piece (9) is provided so as to project inward, and is loosely fitted in the small diameter portion (2a).
The movement is transmitted to the cam plate (5) when it is locked by the snap ring (7) engaged with the neck portion (6a) and the rotor (2) is rotated and the engaging pieces (8) and (9) are engaged. To be done.
Thus, the cam plate (5) is engaged with the engaging piece (8) by the rotation of the rotor (2) in the unlocking direction against the return spring (3).
When the rotor (2) is rotated by the return spring (3) after the contact of (9), the engaging pieces (8) and (9) are separated but the cam plate (5) does not return and the rotation position Maintained at.

The snap ring (7) has a shape shown in FIG. 3, and is a C-shape having a notch groove (10) through which the neck portion (6a) can pass and a hole portion (11) fitted into the neck portion (6a). In addition, the leg portions 12 and 13 on both sides of the cutout groove 10 are elastic pieces having a shape twisted in the vertical direction, that is, in the opposite direction of the plate thickness direction, and act as a stop member and a spring member. The one shown in the figure has a narrow portion (15) with a narrow ring width formed by notching an arcuate (14) groove in the portion facing the notch groove (10) of the ring portion, thereby providing a weak elastic force. It has an elastic piece. In the figure,
(16) shows a connecting rod.

As described above, the cam plate (5) is loosely fitted to the small diameter portion (2a) of the rotor (2) by its shaft hole (9a), and then,
Snap ring (7) is ring groove (6) of small diameter part (2a)
Is inserted into the neck (6a), and the cam plate (5) is elastically attached to the outer periphery (1) by the elastic force of the legs (12) and (13) of the snap ring (7). Because they are touched,
The cam plate (5) is retained by the snap ring (7) and is elastically contacted with the end surface of the outer cylinder (1) to prevent rattling.

(Effects of the Invention) As described above, the snap ring in which the pair of legs are twisted in opposite directions in the plate thickness direction is fitted into the ring groove of the small diameter portion of the rotor of the cylinder lock to repel the cam plate, and the cam plate is repulsed. Since it is elastically contacted with the outer cylinder end surface of the cylinder lock, there is an effect that one snap ring can lock the cam plate and prevent rattling.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a perspective view of a snap ring. (1) ... Outer cylinder, (2) ... Rotor (2a) ... Small diameter part, (3) ... Return spring (4) ... Step part, (5) ... Cam plate (6) ... Ring groove, (6a) ... Neck part (7) ... Snap ring, (8) ... Engaging piece (9) ... Engaging piece, (9a) ... Shaft hole (10) ... Notch groove, (11) ... Hole (12) (13) ... Leg

Claims (1)

[Scope of utility model registration request] 1. A rotor is rotatably provided in a cylinder lock through a return spring, a small diameter portion is formed at a rear end of the rotor, and a cam plate is loosely fitted to the small diameter portion. The cam plate is prevented from coming off through a snap ring that is locked to the small diameter portion, and the cam plate is fixed to the small diameter portion through an engagement piece on the outer circumference of the small diameter portion and an engagement piece in the cam plate shaft hole. In a cam plate locking device for a cylinder lock adapted to be engaged with, a neck portion is formed by providing a ring groove having a groove width extending from the outer position of the cam plate to the inside of the shaft hole of the cam plate in the small diameter portion, The snap ring is
The snap ring is formed as an elastic piece including a notch groove through which the neck portion can pass, a hole portion that fits into the neck portion, and a pair of leg portions that are twisted in opposite directions in the plate thickness direction. A cam plate locking device for a cylinder lock, wherein the cam plate is elastically contacted with the side surface of the ring groove, and the other leg is elastically contacted with the cam plate to elastically contact the cam plate with the outer cylinder end surface of the cylinder lock.