JPH0241251Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a latch bolt conversion structure that can convert the inside and outside of the latch bolt without the need to remove the entire lock from the door, remove the latch bolt, or replace other parts. be.

This type of latch bolt conversion structure itself has already been provided, for example, as seen in Japanese Utility Model Publication No. 56-51580. In this invention, when converting the latch bolt, by removing the front plate and operating the latch bolt conversion member,
The latch bolt protrudes to the outside of the lock case, and
It has a structure that allows the outside to be converted and then returned to the old position, and it can be easily converted by simply removing the front plate and operating the conversion parts, without removing the latch bolts. However, the members operated during conversion are rotated using a screwdriver, etc., which makes the operation relatively cumbersome, and the structure also has the disadvantage of making it more complicated. Ta.

Therefore, the purpose of this invention is to make the operating member for protruding the latch bolt out of the case prior to conversion to a relatively simple structure, and also to allow the operation member to be simply pressed when the front plate is removed and operated. To provide a conversion structure capable of protruding a latch bolt out of a case only by operation. FIG. 1 shows an example of a door lock equipped with such a latch bolt conversion structure, and reference numeral 1 designates a latch bolt that is provided so as to be retractable from the case 2 and the front plate 3. 4 is case 2
The tail 6 of the latch bolt 1 is loosely inserted into the latch guide provided upright between the latch and the cover 5. 7 is a latch spring. 8 is a tail engaging piece 8a
9 is a latch hub having a through hole 9a into which the operating rod of the indoor handle is fitted; 10 is slid backward by the latch hub 9; The retractor is connected to the retractor 8 by engagement between an engagement piece 10a and an elongated hole 8c. Therefore,
When the indoor handle is rotated, the retractor 8 is moved backward via the retractor 10 that responds to the latch hub 9, thereby retracting the latch bolt 1 into the case. Note that the interlocking relationship between the latch hub 9 and the latch bolt 1 is not limited to this example, and it is also possible to have a structure in which the retractor 8 is directly retracted by the latch hub 9, and the retractor 10 can be omitted. Other conventionally known structures can be adopted. 1
Reference numeral 1 designates a rotating lever that is a component in the latch bolt conversion structure that is the main focus of this invention. Rotatably supported. Reference numeral 12 denotes a locking body that is another component, and an engaging portion 12 into which the operating protrusion 11b provided on the back side of the rotating lever 11 is fitted.
It has a. This locking body 12 further includes:
Retaining ring 1 fixed to the rear end of the tail of the latch bolt
3 and the tail engaging piece 8a of the retractor 8.
A detachable engagement portion 12b is provided. 12
Reference character c denotes a guide groove provided on the locking body 12, into which the guide piece 8e of the guide portion 8d provided on the retractor 8 is fitted to guide the sliding movement of the locking body. 12d is a concave portion that accommodates the spring 14, and is a recess that accommodates the retractor 8.
The locking member 12 is held by a spring receiver 8f provided on the guide portion 8d, and constantly applies a resilient force in the tail direction to the locking member 12. 8g is a guide piece of a locking body formed in the guide portion 8d of the retractor 8. The locking body 12 is guided by the guide portion 8d to slide toward the tail and move away from the locking body 12, and is provided so as to be slidable when the retractor retreats. Therefore, when the retractor 8 slides due to the rotation of the latch hub 9, the locking body 12 slides along with this, and also presses the tip 11a of the rotation lever 11 and rotates clockwise in the drawing. When the lever 11 is rotated, the operating protrusion 11b
Due to the engagement of the engaging part 12a with the engaging part 12b, the engaging part 12b is
It is slidable in a direction away from the outer periphery of the tail 6. 15 is a spring for returning the rotating lever 11;
16 indicates a dead bolt.

In the above structure, when converting the inside and outside of the latch bolt 1, first remove the front plate 3 and press the tip end 11a of the rotating lever 11 exposed outside the case. As a result, the locking body 12 slides backward in the direction in which the locking and disengaging portion 12b separates from the tail 6, and as a result, the latch bolt 1 is pulled out of the case by the elastic force of the latch spring 7, as shown in FIG. stand out. In this protruding state, if the latch bolt is reversed and pushed in again, the locking body 12 and the rotating lever 11 will automatically return to the old state due to the elastic force of the spring 14 or spring 15. The engaging/disengaging portion 12b engages again with the tail 6 of the latch bolt, and the conversion operation is completed.

In addition, the combination structure of the guide part 8d provided in the retractor 8 and the locking body 12 is not necessarily limited to the said example. Further, the mounting structure of the spring 14 does not need to be limited to the above example, and for example, one end of the tension coil spring may be fixed to the locking body and the other end may be fixed to the retractor. In short, a guide part that guides the locking body 12 so as to be able to slide toward the tail direction and move away from the locking body 12, and also allows the locking body 12 to slide accordingly when the retractor 8 slides; A spring may be provided to the stopper 12 to constantly apply a resilient force in the tail direction.

As is clear from the above explanation based on the embodiments, in the latch bolt conversion structure according to this invention, the latch bolt can be fixed by simply removing the front plate and pressing the protruding end 11a of the rotary lever exposed outside the case. can be made to protrude outside the case, and by simply inverting the protruding state and pushing it in, the conversion of the latch bolt can be completed.The structure for converting the inside and outside of the latch bolt is extremely simple and structurally simple. is also relatively easy,
We were able to provide an extremely practical latch bolt conversion structure.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a door lock equipped with a latch bolt conversion structure according to this invention.
A part of the cover and the front plate are shown in cross section. Fig. 2 is a side view showing the operating state for converting the latch bolt between the inside and outside, and Fig. 3 shows the engagement state of the latch bolt and the locking body, which is a part of the conversion structure, during normal use. FIG. 4 is a sectional view of the essential parts in a conversion operation state, FIG. 5 is an enlarged perspective view of the retractor, and FIG. 6 is an enlarged perspective view of the locking body. 1... Latch bolt, 2... Case, 3... Front plate, 6... Tail, 8... Retractor,
8a... Tail engaging piece, 8d... Guide portion, 11...
...Rotating lever, 11a... Tip, 11b... Operating protrusion, 12... Locking body, 12a... Engaging portion, 12
b...Latching/disengaging portion, 13...Retaining ring, 14...Spring, 15...Spring.

Claims (1)

[Scope of utility model registration request] A rotating lever, which has a pressing tip that is exposed outside the case when the front plate is removed, is pivoted within the case so that it can be pressed and rotated by applying a return force with a spring. It has an engaging part into which the operating protrusion provided on the side fits, and is engaged with the outer periphery of the tail of the latch bolt between the retaining ring fixed to the rear end of the tail of the latch bolt and the tail engaging piece of the retractor. A locking body having a detachable locking portion is provided, and the locking body is guided to slide in the tail direction and detached, and when the retractor slides, the locking body is caused to slide accordingly. A latch bolt conversion structure in which a guide portion is provided on the retractor, and a spring is disposed between the retractor and the locking body to constantly apply an elastic force to the locking body in the tail direction.