JPH09317279A - Triangular door spring lock to be automatically locked by pulling inner handle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability by providing a locking mechanism in which a door is not opened even when an outside handle is pulled if an inside handle is pulled and locked, and the lock is unlocked if the inside handle is pushed. SOLUTION: When an inside handle 1 is pulled and a door body A is closed, a latch body 4 is projected into a locking hole 5' of a receiving seat 5 to lead to the locked condition. A locking rod 6' of a locking mechanism 6 is projected into an inside curved base part 4' of the latch 4 to prevent the base part 4' from being further retracted in a lock surface 3. The door A is prevented from being opened by pulling an outside handle 2, and an unlocking mechanism 7 is operated to display that a person is present indoor on a display mechanism 8. When the handle 1 is pushed, the locking rod 6' is returned to the original condition to open the door A. If necessary, unlocking is performed by an unlocking mechanism 7 from the outside of the door A in the locked condition, and then, the outside handle 2 is pulled to open the door A. Thus, troublesomeness of locking an indoor lock whenever the door is closed can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a triangular door in which the door lock is automatically locked when the inner handle is pulled, and the door body cannot be opened even if the outer handle is pulled by the inner handle being automatically locked. It relates to a spring lock.

[0002]

2. Description of the Related Art A conventional triangular door spring lock used in a conventional single-opening type door is constructed such that an inner handle 1 is pulled to close the door body, and then an inner lock is applied to the outside. Although it was preventing the door body from being opened from this, this operation is bothersome because it has to lock the door to close the door itself, and forgetting to lock the lock in the toilet or bathroom etc. I often had trouble opening the door.

Therefore, the Applicant has found that the operation of this type of triangular door spring lock requires either pulling the inner handle 1 or the outer handle 2.
When the door body A that has been opened is closed and rotated by pushing,
The inner curved surface 12 of the latch body 4 which is biased by the torsion spring 11 in the triangular door spring lock and projects from the lock surface 3 comes into contact with the seat 5 of the door frame a as shown in FIG. Latch body 4
When the door body A is housed in the door frame a as shown in FIG. As shown in (b), the biasing force of the torsion spring 11 causes the latch body 4 to project into the locking hole 5'of the seat 5 to hold the door body A in the closed position, and conversely, the door body A in the closed state to the outside. When it is opened, the outer curved surface 12 'of the latch body 4 contacts the seat 5 of the door frame a as shown in FIG. 9C, and the latch body 4 rotates the outer curved surface base end portion 4 ". Rotate counterclockwise as the center, and the inner curved surface 1
Paying attention to the fact that the door body A is opened by pulling 2 into the lock surface 3, and when the inner handle 1 is pulled to close the door body A, the inner curved surface base end portion of the latch body 4 interlocks with this movement. The present invention has been completed by finding that the door body A that is closed cannot be opened due to the pulling movement of the outer handle 2 if the 4'is configured not to be immersed in the lock surface 3.

Also, when a person enters and remains in the state of being automatically locked for a long time and the appearance of a person inside is suspicious, or when the door body A opened to the outside is exposed to wind or When the door handle A is closed by the momentum and unfortunately the inner handle 1 is pulled and the door body A is automatically locked, it is possible to unlock the door body A from the outside to open the door body A. And a display mechanism 8 for displaying whether or not a person is inside the room on the inner handle side, and when the inner handle 1 is pulled and released, the door main body A is kept locked and the inner handle 1 is pushed. It is possible to provide a triangular door spring lock that is automatically locked by pulling the inner handle, by attaching a holding mechanism 9 that keeps the unlocked state to the inner handle 1 when the handle is unlocked by moving the mechanism. This is a technical issue.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

[0006] The inner handle 1 is pulled or the outer handle 2 is pushed to project the curved triangular latch body 4 of the lock surface 3 into the locking hole 5'of the seat 5 of the door frame a, and the door body A is fixed. One-sided opening type that holds the door in the closed position and pushes the inner handle 1 or the outer handle 2 to pull the latch body 4 protruding into the locking hole 5 ′ into the lock surface 3 and open the door body A to the outside. It is a triangular door spring lock used for a door, and the door body A cannot be opened even if the outer handle 2 is pulled by being locked by the pulling of the inner handle 1 by the triangular door spring lock, and the inner handle 1 is pushed. The present invention relates to a triangular door spring lock, which is provided with a locking mechanism 10 that is unlocked when moved, and which is automatically locked by pulling an inner handle.

Further, the inner handle 1 is pulled or the outer handle 2 is pushed to cause the curved triangular latch body 4 of the lock surface 3 to project into the locking hole 5'of the seat 5 of the door frame a. Hold A in the closed position and push the inner handle 1 or the outer handle 2
The latch body 4 protruding into the locking hole 5'and the lock surface 3
A triangular door spring lock used for a single-opening type door that is pulled inward to open the door body A to the outside.
In addition, the locking rod 6'protrudes on the inner curved surface base end portion 4'of the latch body 4 interlocking with the movement of the inner handle 1 to prevent the door body A from being opened by the movement of the outer handle 2, 1
The triangle automatically locked by the pulling of the inner handle according to claim 1, further comprising a lock mechanism 6 capable of opening the door main body A by returning the lock rod 6'to its original state by pushing the triangle. This relates to a door spring lock.

Further, between the outer surface of the door body and the inner handle 1, an unlocking mechanism which operates in conjunction with the movement of the lock mechanism 6 of the inner handle 1 and releases the lock operation of the inner handle 1 from the outside of the door body. The triangular door spring lock according to any one of claims 1 and 2, wherein the triangular lock is automatically locked by the pulling of the inner handle.

Further, on the outer surface of the door main body, a display mechanism 8 for displaying whether or not a person is present in the room on the inner handle side in association with the operation of the lock mechanism 6 is provided with the unlock mechanism 7. The present invention relates to a triangular door spring lock that is automatically locked by pulling the inner handle according to any one of claims 1 to 3.

Further, a holding mechanism 9 is provided between the inner handle 1 and the door body A for holding the pulled or pushed state of the inner handle 1 when the inner handle 1 is pulled or pushed. The invention relates to a triangular door spring lock that is automatically locked by pulling the inner handle according to any one of Items 1 to 4.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings, which are examples of embodiments, showing the functions and effects.

An embodiment of claim 1 will be described.

When the inner handle 1 is pulled and the door body A is closed, the latch body 4 of the triangular door spring lock projects into the locking hole 5'of the seat 5 and the door body A is held by the door frame a. Body A
Closes.

At this time, the locking mechanism 10 operates in conjunction with the pulling of the inner handle 1 to lock the triangular door spring lock, so that the door body A cannot be opened even if the outer handle 2 is pulled. When the inner side 1 is pushed, the lock of the locking mechanism 10 is released, and when the outer side handle 2 is pulled, the door body A can be opened.

An embodiment of claim 2 will be described.

When the inner handle 1 is pulled and the door body A is closed, the latch body 4 of the triangular door spring lock projects into the locking hole 5'of the seat 5 and the door body A is held by the door frame a. Body A
Closes.

At this time, the locking mechanism 6 is operated in conjunction with the pulling of the inner handle 1 so that the locking rod 6'projects to the inner curved surface base end portion 4'of the latch body 4 and the inner curved surface base portion 4'is moved. As described above, the lock body 3 is prevented from being retracted, so that the door body A is prevented from being opened by the movement of the outer handle 2.

When the inner handle 1 is pushed, the door lock operation of the lock mechanism 6 is released and the lock rod 6'returns to its original state, so that the door body A can be opened.

In this way, the door lock is automatically locked only by pulling the inner handle 1, and even if the outer handle 2 is pulled, the door body A cannot be opened, and like the conventional triangular door spring lock, the door body is not opened. The trouble of having to lock the lock each time A is closed is eliminated.

A third embodiment will be described.

After the triangular door spring lock locked by the pulling of the inner handle 1 is unlocked from the outside of the door body A by the unlocking mechanism 7, the outer handle 2 is pulled to open the door body A.

An embodiment of claim 4 will be described.

When the inner handle 1 is pulled, the lock mechanism 6 is activated, and in conjunction with this movement, the lock release mechanism 7 is activated to indicate on the display mechanism 8 that a person is inside the chamber on the inner handle side. .

When the inner handle 4 is pushed, the lock mechanism 6 is released and the lock release mechanism 7 returns to its original state, and in conjunction with this movement, there is no person in the room on the inner handle side of the display mechanism 8. Is displayed.

An embodiment of claim 5 will be described.

Since the holding mechanism 9 is provided between the inner handle 1 and the door body A, when the inner handle 1 is pulled and the hand is released, the door lock continues to hold the locked state and the inner handle 1 is pushed. When you release your hand, the door lock continues to hold the unlocked state.

As described above, since the unlocked state continues to be held when the door body A is opened, this holding mechanism 9
If the inner handle 1 is not moved to overcome the holding force of the triangular door spring, the triangular door spring will not be locked.
The problem that the door lock is locked by the moment the door is closed or the locked door body A is unlocked by itself is solved.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings illustrate one preferred embodiment of the present invention.

The embodiments of claims 1 and 2 will be described.

By pulling the inner grip 1 or pushing the outer grip 2, the curved triangular latch body 4 of the lock surface 3 is projected into the locking hole 5'of the receiving seat 5 of the door frame a, and the door body A is fixed. One-sided opening type that holds the door in the closed position and pushes the inner handle 1 or the outer handle 2 to pull the latch body 4 protruding into the locking hole 5 ′ into the lock surface 3 and open the door body A to the outside. It is a triangular door spring lock used for a door, and the door body A cannot be opened even if the outer handle 2 is pulled by being locked by the pulling of the inner handle 1 by the triangular door spring lock, and the inner handle 1 is pushed. A locking mechanism (10) that unlocks when moved is provided.

Also, the inner handle 1 is pulled or the outer handle 2 is pushed to cause the curved triangular latch body 4 of the lock surface 3 to project into the locking hole 5'of the seat 5 of the door frame a, and the door body. Hold A in the closed position and push the inner handle 1 or the outer handle 2
The latch body 4 protruding into the locking hole 5'and the lock surface 3
A triangular door spring lock used for a single-opening type door that is pulled inward to open the door body A to the outside.
In addition, the locking rod 11 'is projected to the inner curved surface base end portion 4'of the latch body 4 in conjunction with the pulling movement of the inner grip 1 to prevent the door body A from being opened by the pulling movement of the outer grip 2, A lock mechanism 6 is provided which is capable of opening the door main body A by returning the lock rod 6'to its original state by the pushing of 1.

The lock mechanism 10 and the lock mechanism 6 will be described.

A pedestal 15 is fixed to the inner surface of the door body A, and a side plate 15 'having two pieces is provided on the inner side of the pedestal 15 so as to project toward the inside of the room. The tip end of the shape is fitted and the both are pivotally attached by the pivot pin 16, and the pedestal 15 is pierced with the respective guide holes which serve as guides for the lock rod 6'and the lock release rod 7'to be described later. 1. A shaft mounting hole is drilled in the tip end of 1, and the base of the lock rod 6'is shaft mounted in the shaft mounting hole by a pin 18, and the other end of the lock rod 6'is passed through a guide hole drilled in the pedestal 15. When the door rod A is inserted into the door body A and the front end of the lock rod 6'is opened outward by pushing the inner handle 4 of the closed door body A, the lock rod 6'locks in conjunction with the pushing action of the inner handle 4. The tip end of the rod 6'is projected to the inner curved surface proximal end 4'of the latch body 4 so that the inner curved surface proximal end 4'is counterclockwise with the outer curved surface proximal end 4 "as an axis. Provided so as to prevent movement which rotates.

Since the present embodiment is constructed as described above, when the open door body A is closed, the handle 1'of the inner handle 1 is grasped and pulled inward, whereby the tip portion of the inner handle 1 is axially moved. The lock rod 6'rotates on the door body side around the attachment pin 16 as an axis, the lock rod 6'moves forward with the guide hole of the pedestal 15 as a guide, and the tip end of the lock rod 6'is the inner curved surface base end of the latch body 4. After crossing the turning locus of 4 ', the door body A is closed and rotated to the door frame a, and the inner curved surface 12 of the latch body 4 is brought into contact with the seat 5 of the door frame a with this closing and rotation. When the latch body 4 rotates clockwise around the inner curved surface base end portion 4'and the inner curved surface 12 is set within the lock surface 3, the torsion spring 11
The latch body 4 projects into the locking hole 5'of the seat 5 by the urging force of, and the door body A is held in the closed position.

When the outer handle 2 of the door body A is pulled in this state, the outer curved surface 12 'of the latch body 4 receives the seat 5 of the door frame a.
When the latch body 4 tries to rotate counterclockwise around the outer curved surface base end 4 ″ as an axis by abutting against the outer curved surface, the inner curved base end 4 ′ comes into contact with the lock rod 6 ′. The door body A cannot be opened because it cannot be rotated.

When the door body A which is closed and the door is locked by the lock mechanism 6 is opened, the handle 1'of the inner handle 1 is grasped and the inner handle 1 is pushed, and conversely to the above, the lock rod 6'of the lock mechanism. Of the inner curved base end 4'is moved away from the rotation locus of the inner curved base end portion 4 ', and the lock mechanism 6 is released, so that the outer curved surface 12' of the latch body 4 is released as the door body A is opened and rotated. The door body A is opened while the outer curved base end portion 4 "is pivoted counterclockwise to draw the side curved surface 12 'into the lock surface 3.

When the outer handle 2 is pushed to close the door main body A, the lock mechanism 6 in the normal state remains unlocked, so that the outer handle 2 closes or opens the door main body A. It becomes possible.

An embodiment of claim 3 will be described.

Between the outer surface of the door body and the inner handle 1, there is provided an unlocking mechanism 7 which operates in conjunction with the movement of the lock mechanism 6 of the inner handle 1 and releases the lock operation of the inner handle 1 from the outside of the door body. Set up.

The lock removing mechanism 7 will be described.

A shaft attachment hole is bored in the inner handle 1 between the shaft attachment pin 16 and the pin 18, and the base of an unlocking rod 7'is axially attached by the pin 19 to the unlocking rod 7 '. The other end of the 'is inserted into the door body A through the other guide hole formed in the guide piece 7, the tip of which is projected from the outer surface of the door body A, and the knob 20 is attached to this projected end. Attach.

Since the embodiment of claim 3 is configured as described above, when the handle 1'of the inner handle is grasped and the inner handle 1 is pulled inward, the lock releasing rod 7'is further projected from the outer surface of the door body A. At the same time, the lock rod 6'moves forward and is locked by the lock mechanism 6 in a state in which the door body A cannot be opened from the outside.

When the knob 20 attached to the rod 7'is pushed from the outside in this state, the tip of the inner handle 1 is rotated counterclockwise in FIG. Since the rod 6'is returned to the unlocked state, the lock mechanism 6 is released, so that the outer handle 2 can be moved to open the door body A.

An embodiment of claim 4 will be described.

On the outer surface of the door body, a lock mechanism 7 is provided with a display mechanism 8 for displaying whether or not a person is inside the room on the inner handle side in conjunction with the operation of the lock mechanism 6.

The display mechanism 8 will be described.

A square-shaped guide body 31 is fixed to the outer surface of the door body at the tip of the unlocking rod 7 ', and the tip of the lock-releasing rod 7'is engaged and fitted into the square hole of the guide body 31. The unlocking rod 7'formed into a shape is provided on the door body A so as to be slidable back and forth in a non-rotating state, and the rectangular shaped portion of the unlocking rod 7'is provided with a horizontally long groove portion as shown in FIG. The rack teeth 35 are provided inside. A display box body 32 is fixed to the outer surface of the door body A, and a rotary shaft 33 is erected on the display box body 32. The rotary shaft 33 is concentric with the rotary shaft 33 in the display box body 32. The dial cylinder 34 is fixed, and "on" when a person is inside the handle and "empty" when no person is inside the dial cylinder 34 is displayed on the cylinder surface of the dial cylinder 34. An identification mark for the rack teeth 35 is attached to the tip of the rotary shaft 33.
When a small gear 36 meshing with is fixed, and the inner handle 1 is pulled, the unlocking rod 7'is pulled to move the rack teeth 35 to the inner handle side, and the rack teeth / small gear mechanism causes the rotation shaft 33 to move. The display mechanism 8 is configured by rotating the display box 32 to display an input from a display window provided on the surface of the display box 32 and displaying "empty" when the inner handle 1 is pushed.

An embodiment of claim 5 will be described.

Between the inner handle 1 and the door body A, the inner handle 1
A holding mechanism 9 for holding the pulling or pushing state of the inner handle 1 when the pulling or pushing action is provided.

The holding mechanism 9 will be described.

A holding plate 21 integrally formed with the pedestal 15 is horizontally provided in the lower part of the seat 15 toward the inside of the room, and has a keyhole shape when viewed from the side on a shaft mounting pin 16 on which the inner handle 1 is mounted. The boss portion of the steel holding body 22 is fixed and the protruding portion 22 'is vertically provided at the other end,
A fan-shaped notch recess 21 ′ is provided on the upper surface of 1 to allow the projecting portion 22 ′ to rotate back and forth when the holder 22 is rotated by the rotation of the shaft mounting pin 16. When the magnet bodies 23, 23 'are fixed to the front and rear steps and the inner handle 1 is moved to lock the triangular door lock by the lock mechanism 6, the holder 22
The protruding portion 22 'of the handle comes into contact with the magnet body 23' and the handle 1
Continues to hold the pulled state, and when the inner handle 1 is pushed or unlocked to pull the rod 7'and the lock mechanism 6 is released, the projecting portion 22 'of the holding body 22 contacts the magnet body 23. The holding mechanism 9 is provided so as to continue to hold the unlocked state.

FIG. 4 shows a second embodiment of the holding mechanism 9, which is a split circle holding cylinder 23 _{1 in} which a circle is cut out when viewed from the side on a shaft pin 16 to which the inner handle 1 is axially mounted. Then, the elastic pressure retaining plate 25 having the engaging convex portion 25 ′ as shown in the figure protruding toward the door body side is fixed to the split cylindrical surface 23 ₁ ′ of the split circle holding cylinder 23 ₁ , and this When the inner handle 1 is moved to the pedestal 15 facing the elastic pressure holding plate 25 and the triangular door lock is locked by the lock mechanism 6, the locking convex portion 25 'of the elastic pressure holding plate 25 is elastically locked and locked. a lock holding engagement recesses 26 for holding, when releasing the lock mechanism 6 by引動the rod 7 'Disconnect pushed or locked inside handle 1, the engaging projection split circular holding cylinder 23 ₁ is rotated The case where an unlock holding engagement concave portion 26 'for elastically locking 25' to hold the unlocked state is provided is shown.

FIG. 5 shows a third embodiment of the holding mechanism 9, in which a cylindrical holding cylinder 24 is fixed to a shaft holding pin 16 to which the inner grip 1 is attached, and the circumference of the cylindrical holding cylinder 24 is fixed. A small hole 27 having a bottom is bored from the surface toward the pin 16 and a small ball 29 is fitted into the small hole 27 via an elastic coil spring 28.
When the triangular handle is locked by the lock mechanism 6 by pulling the inner handle 1 onto the pedestal 15 and the triangular door spring lock is locked, a part of the surface of the small ball 29 is fitted and the locked state is maintained. When the lock mechanism 6 is released by pushing or locking the inner grip 1 and pulling the locking rod 7'to engage the locking lock recess 30, the cylindrical holding cylinder 24 rotates and a part of the small ball 29 is inserted. And unlocking recess 30 'that holds the unlocked state
Is provided.

FIG. 6 shows an embodiment in which the embodiment of the present invention is applied to a dial-shaped inner handle. A pedestal 40 is fixed to the inner surface of the door body A and a holding mechanism is attached to the pedestal 40. The magnet body 41 having a square-shaped fitting insertion hole is fixed as 9, and the square-shaped operating rod 42 ′ of the dial-shaped inner handle 42 is fitted into the fitting-inserting hole, and the rectangular operating rod 42 ′ is projected. The lock holding cylinder 43 is fixed to the end.

Guide holes for guiding the locking rod 6'and the unlocking rod 7'are perforated near the triangular door spring lock of the pedestal 40, and a two-piece bracket 47 is formed at the base of the inner handle 42.
The base of the operating rod 44 is axially attached to the bracket 47, and a channel-shaped axial attachment bracket 48 having an opening projecting toward the indoor side is attached to the pedestal 40 of the inner handle 4 to attach the base. The mounting bracket 48 and the operating rod 44 are axially mounted by the shaft mounting pin 49,
A guide in which a shaft attachment hole is bored in the tip end of the operating rod 44, the forked joint of the lock rod 6'is attached in the shaft attachment hole by a pin 45, and the other end of the lock rod 6'is bored in the base 40. Door body A through the hole
When the inner handle 42 is inserted through the inside of the lock rod 6'and the inner handle 42 is pulled in the same manner as described above, the lock mechanism 6 is activated so that the tip of the lock rod 6'is the inner curved surface base end portion 4'of the latch body 4. The pin 45 is provided with an operating rod 44 near the inner handle 42 of the pin 45 and a shaft mounting hole is bored to unlock the shaft 7 '. The other end of the unlocking rod 7'is inserted into the door main body A through the other guide hole formed in the pedestal 40, and the display mechanism 8 and the knob 20 are provided at the tip thereof.
Is provided.

When the inner handle 42 is pulled, the triangular door spring lock is locked by the lock mechanism 8 and the door body A cannot be opened from the outer handle 2, and when the inner handle 42 is pushed, the lock mechanism 6 is released. To set up.

At this time, when the inner handle 42 is pulled, the lock holding cylinder 43 is magnetically attached to the magnet body 41 to keep the lock state. When the inner handle 42 is pushed, the base portion 47 of the inner handle 42 moves to the magnet body 41. The case where it is provided so as to keep the unlocked state by being magnetically attached is illustrated.

[0058]

Since the present invention is configured as described above, in the inventions of claims 1 and 2, when the inner handle is pulled, the triangular door spring lock is automatically and reliably locked by the locking mechanism or the locking mechanism. Since the door handle cannot be opened with the outer handle, and the person inside the door pushes the inner handle, the triangular door spring lock can be easily unlocked and the door body can be opened from the inside. Unlike conventional triangular door locks, the trouble of having to lock the inner lock every time the door body is closed is eliminated, and it is practical and convenient. Becomes

According to the third aspect of the present invention, the door handle that is automatically locked by the inner handle 1 being pulled can be unlocked from the outside of the door body by the unlocking mechanism to open the door body by the outside handle. When a person enters and the state of being automatically locked continues for a long time and there is no correspondence and the state of the person inside is worried, or the door body that was open to the outside is closed by the wind or something, Unfortunately, when the inner handle is pulled and the triangular door lock is automatically locked, the lock can be easily unlocked and the door body can be opened.

Further, according to the invention of claim 4, since the display mechanism is provided for the lock release mechanism, the two functions are combined into one mechanism having a simple structure, and a person can enter the room without approaching by. Since it can be checked whether or not it is locked, it is a triangular door spring lock that is automatically locked by the pulling of the inner handle, which is extremely convenient.

Further, according to the invention of claim 5, since the holding mechanism continues to hold the unlocked state of the triangular door spring lock, the triangular door must be pulled unless the holding force of the holding mechanism is overcome. In addition to not being able to lock the spring lock, the automatically locked door body continues to hold the locked state, so the trouble that the triangular door spring lock is locked due to malfunction or some kind of momentum can be solved. The triangular door spring lock is automatically locked by pulling the inner handle.

[Brief description of drawings]

FIG. 1 is a cross-sectional view with a part omitted showing a state where a triangular door lock is locked by pulling an inner handle according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view with a part omitted showing a state where the inner handle of the embodiment of the present invention is pushed to unlock the triangular door lock.

FIG. 3 is a schematic explanatory cross-sectional view showing a locked state of the triangular door spring tack of the embodiment of the invention.

FIG. 4 is a transverse cross-sectional view of a main part showing a second embodiment of the holding mechanism of the present invention.

FIG. 5 is a transverse cross-sectional view of a main part showing a third embodiment of the holding mechanism of the present invention.

FIG. 6 is a transverse cross-sectional view in which a part of the embodiment when the embodiment of the present invention is applied to a dial-shaped inner handle is omitted.

FIG. 7 is a perspective view showing a display mechanism of an embodiment of the present invention.

FIG. 8 is a drawing showing the configuration of the triangular door lock according to the embodiment of the present invention, in which (a) is a perspective view of the triangular door lock seen from the back side, and (b).
FIG. 4 is an exploded perspective view thereof.

FIG. 9 is a view showing an operation of the triangular door lock according to the embodiment of the present invention, (a) shows that when the open door body is closed, (b) shows that the door body is held in a closed state by the door frame. At this time, (c) is an explanatory sectional view showing the operation of each latch body when the closed door body is opened.

[Explanation of symbols]

 A Door body 1 Inner handle 2 Outer handle 3 Lock surface 4 Latch body 5 Receptacle 5'Lock hole 6 Lock mechanism 6'Lock rod 7 Lock release mechanism 8 Display mechanism 9 Holding mechanism 10 Locking mechanism

Claims (5)

[Claims] 1. An inner handle is pulled or an outer handle is pushed to cause a latching body having a curved triangular shape of a lock surface to project into a locking hole of a seat of a door frame to hold a door body at a closed position, A triangular door spring lock used for a single-opening type door that opens the door body by pulling the latch body protruding into the locking hole into the lock surface by pushing the handle or pulling the outer handle. The door spring lock is locked by pulling the inner handle, so that even if the outer handle is pulled, the door body cannot be opened, and the lock mechanism is provided so that the lock is released when the inner handle is pushed. Triangular door lock that is automatically locked by pulling the inner handle. 2. An inner handle is pulled or an outer handle is pushed to cause a curved triangular-shaped latch body of a lock surface to project into a locking hole of a seat of a door frame to hold a door body in a closed position, and This is a triangular door spring lock used for a single-opening type door that opens the door body by pulling the latch body protruding into the locking hole into the lock surface by pushing the handle or pulling the outer handle. On the handle, the locking rod is projected to the inner curved surface proximal end of the latch body in conjunction with the pulling of the inner handle to prevent the door body from being opened by the pulling of the outer handle, and the locking rod is pushed by the pushing of the inner handle. 2. A lock mechanism is provided which can return the door to the original state and open the door body.
Triangular door lock that is automatically locked by pulling the inner handle described. 3. An unlocking mechanism is provided between the outer surface of the door body and the inner handle, which operates in conjunction with the movement of the lock mechanism of the inner handle and releases the lock operation of the inner handle from the outside of the door body. The triangular door spring lock that is automatically locked by the pulling movement of the inner handle according to any one of claims 1 and 2. 4. An unlocking mechanism is provided on the outer surface of the door body for displaying the presence or absence of a person in the room on the inner handle side in conjunction with the operation of the lock mechanism. A triangular door spring lock that is automatically locked by pulling the inner handle according to any one of claims 1 to 3. 5. The holding mechanism for holding the pulled or pushed state of the inner handle when the inner handle is pulled or pushed between the inner handle and the door body. A triangular door spring lock that is automatically locked by the inner handle pulling according to any one of the items.