JPH022848Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] The present invention relates to a latch device for a door handle or the like.

[Conventional technology]

In the case of lever-shaped or knob-shaped door handles, a latch device is provided on the door to temporarily lock the opening and closing of the door. The latching device is spring-loaded and projects laterally and can be retracted by turning a handle such as a lever or knob.

By the way, with conventional latch devices, the handle must be turned about 40 to 60 degrees in order to retract the latch protrusion, but with such a large rotation angle, the hand gripping the handle may slip or the wrist may become uncomfortable. It becomes difficult to operate. In particular, with a lever-shaped handle, if the rotation angle is large, the lever must be turned considerably downward from a horizontal position, which causes the hand to slip and puts strain on the wrist, resulting in poor operability.

Several things have been proposed to improve this. For example, the one described in Japanese Utility Model Publication No. 56-30621 is one such example.

This latch lock for a door is a latch lock for a door in which a rotary cam that rotates when a handle is operated and a latch protrusion that is moved by the rotary cam are housed inside a lock box body. At the rear end, engaging portions that stand up opposite each other are formed, and at approximately the middle position of the projecting body, engaging projecting walls each having an inwardly inclined surface are formed relative to each other. , forming fan-shaped cams that engage with the engaging portions, and forming a protrusion having a protrusion that integrally projects from the fan-shaped cam, so that the protrusion rotates to rotate the inclined surface of the engagement protrusion wall. It is designed so that it slides in contact with the surface.

[The problem that the idea aims to solve]

In the above-mentioned latch lock, even if the handle (knob type, lever type, etc.) is turned at a small rotation angle in either the left or right direction, the latch, that is, the sliding body (the latch protruding body in the present invention) retreats sufficiently. This made it possible. This is done using a single rotating cam.

In other words, the structure of this latch lock allows the latch to retreat even when the handle is turned to the left or right.
It was necessary to provide sloped engagement protrusions with which the protrusions at the tip of the rotating cam (protrusions in the present invention) engage, respectively, at upper and lower positions within the sliding body. Therefore, the engagement protrusion can only be formed short, and the engagement protrusion alone cannot be formed long enough to allow the latch to be retracted to its rearmost position.

Therefore, in addition to the above-mentioned engaging projecting wall and protrusion, there is also a fan-shaped cam in addition to the rotating cam, and a fan-shaped cam at the upper and lower positions at the rear of the sliding body.
It is configured to form a step-shaped engagement portion with which the sector-shaped cam comes into contact. Therefore, the backward movement of the latch was performed in two stages, front and rear, using separate components, and there was a concern that the coordination between the two would not work well and the latch would not be able to move smoothly.

On the other hand, especially when the handle is a lever type, a large load is applied to the protrusion at the tip of the rotating cam of the latch device via the square shaft, and when used for a long period of time,
The protrusions may become damaged or worn out.

In this case, if the handle is rotated in either the left or right direction using a single rotating cam as described above, if the protrusion is damaged or worn, the latch cannot be moved back. As a result, it is expected that there will be situations where people become trapped inside the room because the door cannot be opened.

The present invention is an attempt to solve the problems of the conventional devices as described above. That is, an object of the present invention is to be able to sufficiently retract the latch, or the latch protrusion, even when the rotation angle of the handle is small, and even when the handle is rotated in either the left or right direction, and one of the protrusions in the latch device. To provide a latch device for a door handle, etc., which allows the latch to retreat even if the latch is damaged or worn out, and eliminates the trouble of trapping a person in a room.

Structure of the Invention [Means for Solving the Problem] The latch device for a door handle or the like of the present invention is such that a latch protruding body 1 in a latch case 19 has a tip 2 protruded toward the front of the case 19 by a spring 30. , in a latch device for a door handle, etc., in which a hub 15 for retracting the latch, which is rotatable by the handle via a square rod 20, is pivotally supported near the rear of the latch case 19; on both sides of
A pair of actuating plates 9, 10 provided with protrusions 17, 18 as base joints are connected to both sides of the hub 15 and the actuating plates 9, 10.
Locking protrusions 25, 25 and recesses 13, 14 between 10
are formed and fitted together, and the locking recesses 13 and 14 are arranged so that even if one of the actuation plates 9 and 10 rotates due to rotation of the hub 15, the other does not rotate. It is formed to be longer in the circumferential direction than the convex parts 25, 25, and on both sides of the latch protrusion 1 near the rear,
The latch protruding body 1 is retractable by receiving the protrusions 17 and 18 of the actuating plates 9 and 10, and has a cam part 5 that slopes from the upper part toward the front to the lower part at the rear on one side, and the cam part 5 which tilts toward the front on the other side. The cam portions 6 are each formed with an inclined cam portion 6 extending from the bottom to the rear and top.

[Effect]

To open a door using the latch device of the present invention, the handle can be pulled or pushed while turning to the left or right. At this time, the hub 15 is
Because of the rotation, a force is exerted to rotate the actuating plates 9 and 10 fitted on both sides of the hub 15.

To explain the case where the lever is turned to the left from the state shown in FIG. 3, the square rod 20 engages the actuating plate 9 on one side (the near side in FIG. 3) via the locking convex portion 25 of the hub 15. rotates to the left, so that the protruding piece 17, which is the protrusion closer to the front, rotates to the left while contacting the inclined cam portion 5 on the same side of the latch protrusion 1.

The latch protrusion 1 is pulled rearward (leftward in Fig. 5) against the spring 30 as shown in Fig. 5 by the protrusion 17 and the inclined cam part 5, so that the tip 2 of the protrusion 1 is pulled toward the door frame. The door will be opened by pulling or pushing the lever.

In the above case, the retraction of the latch protrusion 1 is caused by the movement of the actuation plate 9 and the rotation of the hub 15 because the protrusion 17 of the actuation plate 9 pulls the inclined cam portion 5 of the protrusion 1 backward. Even a small amount is sufficient, and the latch protrusion 1 can be sufficiently retracted by simply moving the handle by about 30 degrees.

Also, in the above case, if the other side (the back side in Figure 3)
When the actuation plate 10 (on the near side in FIG. 4) rotates at the same time, the protrusion 18 on that side will
This will impede further rotation of the hub 15. However, each actuating plate 9, 10 is fitted into the hub 15 by the locking recess 1 as shown in FIG.
3 and 14 are made larger in the circumferential direction than the locking projections 25 and 25 to form clearances 13b and 14b.

Therefore, even when the hub 15 rotates, the hub 1
The locking convex portion 25 on the other side of 5 does not touch the rotating side edge 14a of the locking recess 14 on that side, and the actuating plate 10 on the other side does not rotate. Therefore, the projecting piece 18 of the actuating plate 10 is connected to the inclined cam portion 6 on that side.
There is nothing that impedes the rotation of the hub 15.

Note that when the lever is turned in the opposite direction, the actuating plate 10 on the other side (back side in the figure) rotates via the locking convex portion 25 of the hub 15, and the protrusion 18 rotates on the other side. Pull the inclined cam part 6 of the latch protrusion 1 backward.
can be pulled backwards. At that time, the previous actuation plate 9 (the actuation plate on the near side in the figure) is attached to the locking recess 1 on that side.
3 and the locking protrusion 25 prevents rotation.

As mentioned above, when the lever is turned to either the left or right direction, the latch protrusion 1 moves backward.
The projections 17 and 18 of the left and right actuating plates 9 and 10 provided on the hub 15 and the left and right inclined cam portions 5 and 6 provided on the protruding body 1 allow the user to move to the end in one go. be exposed. Therefore, the latch protrusion 1 can smoothly move backward.

In addition, if the handle is a lever, the projecting pieces 17 and 18
The protrusions 17 and 18 on either side may be damaged or damaged due to a large load being applied to them or due to long-term use.
Even if worn, the latch 1 on the other side can be retracted by the latch 1 via the inclined cam on that side. In other words, by turning the lever in the opposite direction, the latch moves back and the door can be opened and closed.

〔Example〕

Reference numeral 1 denotes a latch protrusion, the tip 2 of which has an inclined surface that comes into contact with a locking member (not shown) of the door frame, and upper and lower horizontal pieces 3 and 4 provided at the rear of the tip 2; On both rear sides of the horizontal pieces 3, 4, cam parts 5, 6 whose front surfaces are inclined rearward are formed symmetrically so that the upper and lower sides are reversed on each side. A spring locking protrusion 7 is formed at the rear end of the tip portion 2, and a recessed portion 8 is formed at the rear of the inclined cam portions 5, 6 to avoid a hub 15, which will be described later.

Reference numerals 9 and 10 indicate operating plates on both sides, which have the same configuration and are symmetrically provided. Each operating plate 9, 10 is
On the rear side of a long board material in the front and back, each has a round hole 11, 12 in the center and a locking recess 13, 14 at the front and rear positions on the outer periphery, and on the opposing surface near the front side, Protrusions 17 and 18 are provided respectively as original nodes.

Reference numeral 15 denotes a hub, which has a square hole 21 horizontally disposed in the center through which a square rod 20 is inserted, and has a larger diameter portion 22 near the center of the outer periphery than the round holes 11 and 12 of each of the actuating plates 9 and 10. Then, on both sides of the large diameter portion 22, small diameter portions 23, 24 are formed in which the actuating plates 9, 10 can be fitted with the round holes 11, 12, and the actuating plates 9, 10 are provided at the front position of the outer periphery. Locking protrusions 25 and 25 that can be engaged with the locking recesses 13 and 14 are formed.

Locking recesses 13 and 14 in the actuation plates 9 and 10
The relationship between the locking convex portions 25 and 25 of the hub 15 is such that when the actuation plate on one side rotates, the actuation plate on the other side does not rotate and engages the locking recesses 13 and 14. Stopper convex part 2
5 and 25 in the circumferential direction. That is, the locking convex portion 25 of the hub 15 is
Locking recesses 1 in the actuating plates 9 and 10 on each side as shown in the figure.
3 and 14, and clearances 13b and 14b are created on the opposite rotation side.

The projecting pieces 17 and 18 of the actuating plates 9 and 10 on both sides are
As shown in Fig. 1, the latch protrusion 1 is protruded forward by the spring 30, so the latch protrusion 1 is normally
As shown in the figure, both engage the rear portions along the inclined cam portions 5 and 6, respectively. Therefore, the front portions of both actuating plates 9 and 10 are at positions slightly rotated toward the opposite rotation side.

Reference numeral 16 denotes a hub support frame plate, and operating plates 9 and 1 sandwich the inclined cam portions 5 and 6 at the rear of the latch protrusion 1 from both sides between both side plates 27 and 27 folded back at the front and rear.
0 is engaged. Further, the support frame plate 16 has hub holes 28, 28 formed near the rear of the hub 15.
The small diameter parts 23 and 24 on both sides are rotatably engaged, and the folded part 29 on the front part is connected to the upper part of the protruding body 1.
It is engaged between the lower horizontal pieces 3 and 4.

A push spring 30 is interposed between the protrusion 26 formed at the front of the folded portion 29 and the protrusion 7 of the latch protrusion 1 to push the protrusion 1 forward.

Reference numeral 19 denotes a latch case, which houses the latch protrusion 1 between the support frame plates 16, the actuating plates 9, 10, and the hub 15 in its cylindrical interior, and has round holes 31 formed on both sides of the case 19 near the rear. 31, the small diameter portions 23 and 24 of the hub 15 are rotatably engaged, and the case 19
The tip 2 of the protruding body 1 can go in and out through the opening 32 at the front end.

[Effect of idea]

As is clear from the above, the latch device according to the present invention is capable of sufficiently and smoothly retracting the latch to the rearmost position even when the handle is turned at a small rotation angle in either the left or right direction. can be improved. Furthermore, even if the protruding piece on one side is damaged or worn out, the latch can be retracted unlike before, which has the useful effect of eliminating troubles such as people being trapped in the room. It is.

That is, in the prior art, it was necessary to turn the handle approximately 40 to 60 degrees in order to retract the latch protrusion. There are also models with a smaller rotation angle of the handle, but the latch protrusion moves in two stages, front and rear, and separate components are used for each stage, so the coordination of the front and rear stages of operation is difficult. It didn't go well, and the retraction movement of the protruding body was not smooth, and there was a concern that trouble would occur.Moreover, if too much force was applied to the handle operation, or if the protrusion was damaged or worn out due to long-term use,
Latsuchi could not be retreated and people could become trapped in the room.

On the other hand, in the latch device of the present invention, as described above, the protrusions of the actuating plate on either side provided on both sides of the hub direct the rotation of the handle to the slopes on either side formed on both sides of the latch protrusion. The latch projection is retracted to the rearmost position by transmitting the signal to the cam portion.

Therefore, the latch can be retracted by rotating the handle either to the left or right, and even if the rotation angle of the handle is small, the latch can be sufficiently retracted to the rearmost position. The latch can be moved back to the rearmost position in a single movement using the projecting piece and the inclined cam part, and is smooth and almost trouble-free.

Moreover, with this invention, even if the protrusion on one side is damaged or worn, by turning the handle in the opposite direction, the protrusion on the other side will come into contact with the inclined cam part on the same side, causing the latch protrusion and latch to move backward. can be done. Therefore, unlike in the past, it is possible to eliminate the problem of people being trapped in a room.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially vertical left side view, Fig. 2 is a perspective view of the main part, and Fig. 3 is a perspective view of the main part.
The figure is a left side view of the main part before operation, FIG. 4 is a right side view of the main part before operation, and FIG. 5 is a left side view of the main part after operation. Drawing code: 1-Latch protrusion, 2-Tip, 5,
6-inclined cam part, 9,10-operating plate, 13,1
4-locking recess, 15-hub, 17, 18-protruding piece, 19-latch case, 20-square bar, 30-spring.

Claims (1)

[Claims for Utility Model Registration] The latch protrusion 1 in the latch case 19 has its tip 2 protruded toward the front of the case 19 by a spring 30, and is rotatable by the handle via the square rod 20 to operate the latch backward. In a latch device for a door handle, etc., in which a hub 15 for retracting the latch is pivotally supported near the rear of a latch case 19, on both sides of the hub 15 for retracting the latch,
A pair of actuating plates 9, 10 provided with protrusions 17, 18 as base joints are connected to both sides of the hub 15 and the actuating plates 9, 10.
Locking protrusions 25, 25 and recesses 13, 14 between 10
are formed and fitted together, and the locking recesses 13 and 14 are arranged so that even if one of the actuation plates 9 and 10 rotates due to rotation of the hub 15, the other does not rotate. It is formed to be longer in the circumferential direction than the convex parts 25, 25, and on both sides of the latch protrusion 1 near the rear,
The latch protruding body 1 is retractable by receiving the protrusions 17 and 18 of the actuating plates 9 and 10, and has a cam part 5 that slopes from the upper part toward the front to the lower part at the rear on one side, and the cam part 5 which tilts toward the front on the other side. A latch device for a door handle, etc., characterized in that each of the cam portions 6 is inclined from the bottom to the rear and upward.