JPS5828127Y2 - door lock - Google Patents

Description

[Detailed description of the invention] This invention uses a catch fixed to the door mounting frame and a removable latch that is resiliently attached to the lock body by a retaining spring, and is attached to the door separately from the lock body. The present invention relates to a door lock in which the latch is operated by a bushing button supported on a fixed pedestal to release the lock from the catch.

In the above door lock, the lock body and the pedestal are separately attached to the front and back sides of the door.
It is difficult to mount them accurately in preset positions, and they are often subject to relative displacement.This also means that the mounting position of the lock body depends on the relationship between the catch and the latch, which are fixed to the door mounting frame. This is also due to the fact that it is regulated.

In this way, when the mounting position of the lock body and the pedestal changes, the point of action of the latch operating rod on the bushing button changes, and as a result, the pushing stroke of the bushing button to release the latch is larger than the set value, or Due to the small size, errors in mounting the door lock directly affect the door lock function.

Furthermore, if the lock body attachment position is restricted and the degree of freedom in the button attachment position is reduced, it becomes difficult to create a door frame configuration and door design that are highly usable.

The present invention is an improvement that can solve the above-mentioned problems, and even if the point of action of the actuating rod on the button is displaced, the button can be pressed in the stroke according to the set value, so that the latch can be prevented by pressing the button. The purpose is to keep the operating stroke constant at all times, to ensure a more secure locking state with the catch, and to make the unlocking operation smoother.

The drawings showing the embodiments of the present invention will be described in detail below.
Door 1 opens and closes in the direction of arrows a+-)a' in Figure 1.
On the inner surface of the door mounting frame 2 to which the door mounting frame 2 is hinged, a seat 3 is provided with an engagement protrusion 3a having a substantially chevron-shaped side surface and is secured with screws 4.

The latch 5, which engages and disengages from the engagement protrusion 3a of the catch seat 3, is formed into a cross-shaped side surface, with one end serving as a retaining portion 5a and the other end serving as an operating rod 5b. The bent portion is rotatably supported by a pin 8 within the lock body 7 which is fixed with a screw 6.6, and one end 9a is attached to the wall surface of the lock body 7, and the other end 9b is attached to the above-mentioned operating rod. 5b and externally mounted on the pin 8, the latch 5 is moved clockwise in FIG. Those who do so are now more repulsed.

In addition, the pedestal 11 fixed to the surface of the door 1 with screws 10.10 has finger rests 11a, 11a protruding symmetrically, and a button 1 in the center hole 11b.
2 is slidably inserted by pushing in the axial direction.

The bush button 12 has a stepped portion 12a that is formed around the inner portion of the button so as to have a diameter larger than that of the portion protruding from the center hole 11b. It is supported by the pedestal 11 in such a way that it abuts against it and is prevented from leaving in the outward direction, and has a pressing part 12b on its inner end, which is in contact with the operating rod 5b of the latch 5, either integrally or made of a separate member. It is fixed and provided.

This pressing portion 12b is long in the length direction of the operating rod 5b and is formed flat, and the tip of the operating rod 5b is brought into contact with the elastic force of the engagement spring 9. In this state, the engaging portion 5a is engaged and held with the engaging protrusion 3a of the catch seat 3.

That is, the purpose of providing the pressing portion 12b as long as described above is to increase the relative adjustment margin l between the lock body 7 and the pedestal 11 with respect to the door 1.

In other words, this is to ensure that the point of action of the operating rod 5b on the pressing portion 12b is within a wide range.

Further, the surface of the pressing part 12b that the operating rod 5b comes into contact with is formed as a flat surface 12b', and the tip of the excellent operating rod 5b is formed as an arcuate or spherical surface 5b'. The contact is a line contact or a point contact.

By forming the pressing part 12b and the operating rod 5b in this way, the lock release operation can be made smooth due to the sliding movement of the two, and when the point of action of the operating rod 5b on the pressing part 12b is displaced, the pushbutton can The unlocking stroke can be made more accurate.

In the above configuration, the latch 5, which is resiliently biased clockwise by the engagement spring 9, has its operating rod 5b tip abutted against the pressing portion 12b of the bushing button 12, and the button 12 is held in such a state that its tip protrudes from the open end of the center hole 11b of the pedestal 11 so that it can be pushed in, and the latch 5 is held in such a manner that the button 12 is held as described above. held in place.

Therefore, when the door 1 is closed in the direction of the arrow a' in the figure, the engaging portion 5a of the latch 5 will engage the engaging protrusion 3 of the catch seat 3.
As a result, the latch 5 is rotated counterclockwise against the elastic force of the engagement spring 9, so that the retaining portion 5a overcomes the engagement protrusion 3a and at the same time the engagement spring 9 It returns to its original position and engages with the engaging protrusion 3a as shown in FIG. 1, thereby locking the door in the closed state.

When the button 12 is pressed and operated with the closed door locked, the pressing part 12b is pressed against the operating rod 5 of the latch 5.
b is pressed counterclockwise against the engagement spring 9, the latch 5 rotates counterclockwise, and the engagement portion 5a is disengaged from the engagement protrusion 3a.

Therefore, the door can be opened by holding the pedestal 11 in this state.

Retaining part 5a necessary to release the lock in this way
The amount of movement of the operating rod 5b and the amount of movement of the operating rod 5b are proportional to the ratio of their lengths from the pin 8. However, since the pressing portion 12b is provided long in the length direction of the operating rod 5b, However, even if the point of action of the lock main body 7 and the pedestal 11- are moved to point b' or b'' in the figure due to a relative change in the vertical direction, the button 12 for unlocking will not be activated. The amount of movement of the operating rod 5b is the same as at the point b shown in the figure, and therefore, the lock body 7 and the seat 11 can be attached to the door 1 within the range of the adjustment range l shown in the figure. , the lock release function, that is, the pushing stroke of the bushing button 12 can be kept constant.

As explained above, the door lock according to the present invention consists of a catch 3 fixed to the door mounting frame 2, a lock body 7 and a pedestal 11 that are individually attached to the front and back sides of the door 1, and the pedestal 11 penetrates the door so that it can be pushed freely from the front side to the back side,
The push button 12, which is prevented from being removed, is fitted and inserted, and one end of the lock body 7 contacts the retaining portion 5a, which is removably engaged with the catch seat 3, and the tip of the push button 12. A latch 5 consisting of an operating rod 5b is pivotally attached, and the engaging portion 5a is directed toward the seat 3 and the operating rod 5b is attached to the latch.
Not only is an engagement spring 9 attached which urges the button 12 towards the button 12, but also the tip of the button 12, which the operating rod 5b comes into contact with, has at least the operating rod 5b.
Since the button 12 and the lock body 7 are provided with a pressing part that is long and flat in the length direction, the button 12 and the lock body 7 are
Even if latch 5 is installed displaced from the set position,
The tip 5b' of the operating rod 5b does not separate from the pressing part 12b, and the point of action only moves on the same plane, even if the mounting position of the base 11 and the lock body 7 is inaccurate. Regardless, the pushing stroke of the bushing button 12 does not change at all and remains constant as set, so that the adverse effects of an error in the mounting position on the unlocking operation of the latch 5 can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one state of use of the door lock according to the present invention, and FIG. 2 is a sectional view taken along the line III in FIG. 1...Door, 2...Door mounting frame, 3.
...Catch, 5...Latch 5a...
・Engagement part, 5b... Operating rod, 5b'...
- Arc or spherical surface at the tip of the operating rod, 7...Lock body, 9...Engagement spring, 11...Pedestal, 12...Button button , 12b...
...Press section.

Claims (2)

[Scope of utility model registration request] (1) It consists of a catch that is fixed to the door mounting frame, and a lock body and pedestal that are individually attached to the front and back sides of the door. The bushing button that is prevented from being removed is inserted into the lock body, and the lock body includes an engaging part whose one end is releasably engaged with the catch seat, and an operating rod that comes into contact with the tip of the bushing button. A latch is pivotally attached to the latch, and the latch is provided with an engagement spring that urges the retaining portion toward the catch and the operating rod toward the button button. A door lock in which a pressing part is provided at the tip of a button at least in the length direction of the operating rod and is flat. (2) The door lock according to claim 1, wherein the tip of the operating rod of the latch is formed into a spherical or arcuate surface so as to make point or line contact with the plane of the pressing part of the button.