JPH0239003Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Field of industrial application This invention relates to a device for preventing rattling of a rectangular shaft for retracting a lock piece in a lock.

(2) Prior art In the case of a lock in which the lock piece is inserted while the rotator is rotated together with a square shaft by a certain lever or grip provided at both ends, the diameter of the square hole of the rotor must be adjusted. Since the diameter of the square shaft is slightly larger than the diameter of the square shaft to make it easier to insert the square shaft, there is a possibility that the square shaft may wobble and when the lever or grip ball is grabbed, the lever or grip ball may be slightly As it sways, it makes a sound.

Therefore, as disclosed in Japanese Utility Model Application Publication No. 56-143354, the lever shaft is prevented from wobbling by the elastic force of a spring incorporated in the lever shaft insertion opening.

(3) Problems to be solved by the invention When the lever shaft is inserted into the lever shaft insertion slot, the protruding part of the spring is pressed by the lever shaft and escapes, and then the elastic force acting on the protruding part of the spring causes the lever shaft to escape. This prevents the lever shaft from wobbling, but as the lever rotates, a prying force acts on the lever shaft, pushing back the protrusion of the spring.

For this reason, there was a problem in that the lever shaft would swing.

(4) Means for solving the problems In order to solve the above problems, this invention
A leaf spring is stacked between both ends of the required surface of the square shaft, and the ends of the leaf spring are fixed to both ends of the square shaft, and the part of the leaf spring that contacts the mounting recessed hole of the gripping member and the square hole of the rotator are fixed. A wavy bent protrusion is located at the part where it comes into contact with.

(5) Function In this invention, a square shaft equipped with a leaf spring is inserted into a square hole of a rotator, and then the square holes are fitted into both ends of the square shaft to attach a gripping member.

At this time, the bent protrusions at both ends of the leaf spring are pushed back by the inner surface of the square mounting hole of the gripping member, and the intermediate bent protrusions of the leaf spring are strongly pressed against the inner surface of the square hole of the rotator.

(6) Example In the figure, A is a lock, and this lock A is a mounting lock box 1 and a through hole 2 provided in the front end wall of this lock box 1.
A lock piece 3 is inserted into the through hole 2 so as to be freely retractable.
, a rotator 4 which is built into the lock box 1 with both ends rotatably supported through both side walls of the lock box 1, and a connecting rod 5 connecting the rotator 4 and the end of the lock piece 3. and,
Consisting of a square shaft 7 passed through a square hole 6 provided at the axis of the rotator 4, and a gripping member 9 attached by fitting square recessed holes 8 into both ends of the square shaft 7. has been done.

In the illustrated case, the screws 10 are screwed in from the base surfaces of both gripping members 9 toward the recessed holes 8, and the tips of the screws 10 are pressed against the circumferential surface of the square shaft 7. It may be of a type in which one end of the square shaft 7 is inserted and fixed with the front end.

Further, a leaf spring 11 is stacked between both ends of one surface of the square shaft 7, and both ends of the leaf spring 11 are fixed to the square shaft 7.

In the case shown in the figure, the above fixing method involves providing a groove 12 between both ends of one surface of the square shaft 7, fitting the plate spring 11 into the groove 12, and then bending both edges of the groove 12 inwardly. While the tapered surfaces of the upper edges of both ends of the leaf spring 11 are held in as shown in FIG. 5 to stop the leaf spring 11 from sliding, they may be fixed by spot welding or the like.

Further, the recessed hole 8 and the square hole 6 of the leaf spring 11 are
A wavy bent protrusion 13 is located at a portion that contacts the circumferential surface of the holder.

Next, the assembly method will be explained. The square shaft 7 is passed through the square hole 6 of the rotator 4.

At this time, the protrusion 13 of the leaf spring 11 is inserted into the square hole 6.
position.

Thereafter, the recessed holes 8 are fitted into both ends of the square shaft 7, and the gripping members 9 are attached.

As the gripping member 9 is attached, the protrusions 13 at both ends of the leaf spring 11 are pushed back by the recessed hole 8, so that the central protrusion 13 of the leaf spring 11 is inserted into the square hole 6.
is forced upon you.

(7) Effects As described above, according to the rattling prevention device for a square shaft according to this invention, gripping members are set at both ends of the square shaft, and the ends of the leaf spring are held by the recessed holes in the gripping members. Since the protrusion is pushed back and the central protrusion of the leaf spring is pressed against the inner periphery of the square hole, the central protrusion of the leaf spring is prevented from being pushed back as the square shaft is driven.

Therefore, rattling of the square shaft can be effectively prevented.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of the lock according to this invention, Fig. 2 is a cross-sectional plan view of the same, Fig. 3 is an exploded perspective view showing the main parts of the same, Fig. 4 is a perspective view of the square shaft,
FIG. 5 is a front view of the square shaft, and FIG. 6 is a sectional view taken along line XX in FIG. 4. A...Lock, 1...Lock box, 2...Through hole, 3...
Lock piece, 4... Rotator, 5... Connecting rod, 6... Square hole,
7... Square shaft, 8... Recessed hole, 9... Gripping member, 1
0...screw, 11...plate spring, 12...concave groove, 1
3... Protrusion.

Claims (1)

[Scope of utility model registration request] In a lock in which a lock piece is inserted while rotating a rotator together with a square shaft using a gripping member, a leaf spring is stacked between both ends of the required surface of the square shaft, and the ends of the leaf spring are fixed to both ends of the square shaft. Furthermore, a square shaft in a lock is characterized in that a wavy bent protrusion is located at a part of the leaf spring that contacts the mounting recessed hole of the gripping member and a part that contacts the square hole of the rotator. Anti-rattle device.