JP2003328603A - Lock handle device for drawer rotary operation type door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock handle device for a drawer rotary operation type door in which the number of components is reduced and an operating handle is held accurately at an initial drawing angle without increasing the depth of the whole device while a discomfortable collision sound and harmful vibrating impulses are not generated in the case of the retraction of the operating handle. <P>SOLUTION: A projecting type arcuate surface 9 using a traversing pivotal shaft 7 as a center of curvature is formed on the rear side of the base-end connecting section 4 of the operating handle 3, and a recessed type arcuate surface 10 is formed on the front side of the front-end connecting section 6 of a locking main shaft 5. A receiving hole 11 is formed to the locking main shaft 5 in the longitudinal direction while being bored to the arcuate surface 10, and a spherical body 12 movably housed in the receiving hole 11 in the longitudinal direction is urged in the projecting direction by a spring member 13. When the operating handle 3 is drawn up to a fixed angle from a housing 2, a recessed section 14, to which a part of the spherical body 12 is brought into press-contact and engaged, is formed in the convexed arcuate surface 9. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer rotation operation type door lock handle device that locks a door with respect to a fixed frame body such as a box body storing various devices.

[0002]

2. Description of the Related Art In a conventional lock handle device for a drawer rotation operation type door as described in Japanese Patent No. 2969118, for example, the entire operation handle or a main body part is housed in a housing fixed to the door so that the operation handle can be retracted. , Connecting the proximal end connecting part of the operating handle to the front end connecting part of the locking spindle by means of a transverse pivot, pulling out the operating handle from the housing to a predetermined angle and rotating around the transverse pivot, and then rotating the locking spindle by the operating handle. The door is unlocked from the fixed frame.

In this drawer rotation operation type door lock handle device, a circular spring plate fitted to the front end connecting portion of the locking main shaft so as not to rotate relative to it is used as a holding mechanism for holding the operation handle in the immersive city or the withdrawn position. Used,
On the back side of the base end connecting portion of the operation handle, there is formed a locking projection having a chevron cross section that abuts the front surface of the spring plate. When the operating handle is housed in the housing, the apex of the locking protrusion is located on the opposite side of the grip of the operating handle with respect to the reference line perpendicular to the door surface passing through the transverse pivot. When the handle is pulled out from the housing, the meeting angle of both slopes of the locking projection is set so that the apex of the locking projection is located at a position beyond the reference line toward the grip portion side.

Since the number of constituent parts of the holding mechanism constructed in this way is reduced to the utmost limit, it is advantageous in reducing the manufacturing cost, but on the other hand, when the operating handle is retracted into the housing, the apex of the locking projection is apex. Since the operation handle rapidly rotates due to the elastic repulsive force of the spring plate at the moment when the portion exceeds the reference line, the grip portion of the operation handle vigorously collides with the inner bottom surface of the housing.

The collision sound generated when the operating handle is immersed causes a discomfort to the surrounding work environment or labor environment, and the shock vibration is built in the lock handle device itself or a device installed around the lock handle device. It may have a harmful effect on electronic parts or electric parts such as sensors and micro switches.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a holding mechanism capable of accurately holding the operating handle at the initial pull-out angle without increasing the depth dimension of the entire device due to the small number of constituent parts. It is an object of the present invention to provide a lock handle device for a drawer rotation operation type door that does not generate an unpleasant collision sound or harmful vibration impact when the operation handle is immersed.

[0007]

Means for Solving the Problems In order to solve the above problems, in the invention of claim 1, in order to solve the above problems, in the housing 2 fixed to a door 1, the entire operation handle 3 or The main body part is retractably housed, and the base end connecting portion 4 of the operation handle 3 is connected to the front end connecting portion 6 of the locking main shaft 5 by a transverse pivot shaft 7, and the traverse pivot shaft 7 is used as a center to move the operation handle 3 from the housing 2 at a predetermined angle. In the lock handle device for a drawer rotation operation type door, the lock handle shaft 5 is rotated by the operation handle 3 after being rotated to the drawer until the door 1 is unlocked from the fixed frame body 8. A convex arc surface 9 having the transverse pivot axis 7 as the center of curvature is formed on either the rear side of the base end connecting portion 4 or the front side of the front end connecting portion 6 of the locking main shaft 5, and the base end connection of the operating handle 3 is formed. A concave arc surface 10 having a transverse pivot axis 7 as the center of curvature is formed on the other side of the rear side of the portion 4 and the front side of the front end connecting portion 6 of the locking main shaft 5, and the concave arc surface 10 or the convex arc surface is opened. A receiving hole 11 is formed in the locking main shaft 5 or the operating handle 3 in the front-rear direction, and a sphere 12 housed in the receiving hole 11 so as to be movable in the front-rear direction is urged by a spring member 13 in the protruding direction, so that the operating handle 3 is housed. When it is pulled out from 2 to a predetermined angle, a concave portion 14 with which a part of the spherical body 12 is pressed and engaged is formed on the convex arc surface 9 or the concave arc surface 10.

In the drawer rotation operation type door lock handle device of the second aspect of the present invention, in addition to the structure of the first aspect of the invention, a part of the spherical body 12 is always engaged, and the operation handle 3 is pulled out. An arc-shaped groove 15 in which a part of the sphere 12 moves in response to rotation is formed on the convex arc surface 9 or the concave arc surface 10, and the recess 14 is formed on a part of the arc groove 15.

[0009]

In this drawer rotation operation type door lock handle device, when the operation handle 3 is housed in the housing 2, the spherical body 12 has a convex arc surface 9 or a concave arc surface 10 at a portion other than the concave portion 14. And is stably held in the storage position by the elastic repulsive force of the spring member 13.

When the operating handle 3 is pulled out at a predetermined angle around the transverse pivot 7, the contact point between the convex arcuate surface 9 or the concave arcuate surface 10 and the sphere 12 moves toward the recess 14 and the operating handle 3 At the moment when is pulled out to a predetermined angle, a part of the spherical body 12 falls into the recess 14 and engages with it. Due to this engagement and the elastic repulsive force of the spring member 13, the operation handle 3 is accurately held in the initial pulled-out position.

By rotating the locking main shaft 5 with the operation handle 3, the door 1 is unlocked from the fixed frame body 8, and the door 1 is opened for inspection and repair of equipment. After the required work is completed, the door 1 is closed, the operation handle 3 is returned to the original position where it was pulled out, that is, the position where the operation handle 3 is aligned with the handle accommodating portion of the housing 2, and then the operation handle 3 is pushed into the housing 2.

In this way, when the operating handle 3 is retracted and rotated about the transverse pivot 7 in the housing 2, a part of the spherical body 12 comes out of the recess 14 at the beginning of the rotation. The contact point between the spherical body 12 that has escaped from the recess 14 and the convex arc surface 9 or the concave arc surface 10 moves away from the recess 14 as the immersion rotation progresses. Since the center of curvature of the convex arc surface 9 or the concave arc surface 10 is placed on the transverse pivot 7, the elastic repulsive force by the spring member 13 is exactly the same during the immersion rotation, and this elastic repulsive force traverses the operation handle 3. Since an appropriate frictional force works consistently between the pivots 7, the operation handle 3 does not rotate rapidly. The operation handle 3 is immersively operated in the housing 2 at a speed appropriately adjusted by an operator.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the embodiment shown in FIGS. 1 to 8, the locking main shaft 5 is immovably fitted in a front and rear direction into a bearing tubular portion 16 formed on the upper back surface side of the housing 2, and is locked. A lock member 17 made of a substantially L-shaped plate or the like is fitted to the rear end angular shaft portion so as not to be able to rotate relative to each other, and is fastened and fixed by a bolt 18. A rear side cavity 19 having a fan-shaped vertical cross section is formed in the rear end side of the operation handle 3 so as to open to the rear side, and the rear side cavity 19 is formed so as to project from the front side of the locking main shaft 5. A thin plate-shaped front end connecting portion 6 is inserted and is pivotally attached to the base end connecting portion 4 of the operation handle 3 by a transverse pivot 7 parallel to the front surface of the door 1.

The operating handle 3 is formed with a profile so that substantially the entire operation handle 3 except the tip finger-holding portion 20 is immersed in the housing 2. After the operation handle 3 is pulled out from the housing 2 to a predetermined angle about the transverse pivot 7 and rotated, the locking main shaft 4 is rotated together with the operation handle 3 so that the lock member 17 is received on the fixed frame 8 side. 21 and the door 1 is unlocked from the housing 2.

A convex arcuate surface 9 whose center of curvature is the transverse pivot 7 is formed on the rear side of the base end connecting portion 4 of the operating handle 3, and the front end of the front end connecting portion 6 of the locking main shaft 5 is provided on the front side thereof. 7
A concave arc surface 10 having a center of curvature is formed, and the convex arc surface 9 and the concave arc surface 10 are in face-to-face contact with each other. A receiving hole 11 opened in the concave arc surface 10 is formed in the main body portion of the locking main shaft 5 in the front-rear direction.
The hard sphere 12 housed in is urged in the protruding direction by a spring member 13 formed of a compression coil spring.

An arcuate groove 15 in which a part of the sphere 12 is constantly engaged and a part of the sphere 12 moves in response to the pull-out rotation of the operation handle 3 is formed on the convex arc surface 9. , The recess 14 with which a part of the spherical body 12 is press-fitted when the operation handle 3 is pulled out from the housing 2 to a predetermined angle.
Are formed in a part of the arcuate groove 15 of the convex arc surface 9.

In the embodiment shown in FIG. 9, the operating handle 3
A concave arcuate surface 10 having a center of curvature on the transverse pivot 7 is formed on the back side of the proximal end connecting portion 4 of the locking main shaft 5, and a convex centered on the front side of the front end connecting portion 6 of the locking main shaft 5 with the transverse pivot 7 as the center of curvature. A circular arc surface 9 is formed, and a convex circular arc surface 9 and a concave circular arc surface 10 are formed.
Are in face-to-face contact with each other. A receiving hole 11 opened in the convex arc surface 9 is formed in the front-rear direction in the base end connecting portion 4 of the operation handle 3, and the hard sphere 12 housed in the receiving hole 11 is a spring formed of a compression coil spring. It is biased in the protruding direction by the member 13.

An arcuate groove 15 in which a part of the sphere 12 is always engaged and a part of the sphere 12 moves in response to the withdrawal rotation of the operation handle 3 is formed in the concave arc surface 10. When the operating handle 3 is pulled out from the housing 2 to a predetermined angle, a part of the spherical body 12 is pressed and engaged with the concave portion 14.
Are formed in a part of the arcuate groove 15 of the concave arc surface 10.

In any of the above embodiments, a combined lock mechanism for locking the operation handle 3 in the housing 2 in the retracted state is incorporated. The contents of the compound lock mechanism will be described below. A lock member 25 that engages with and disengages from a receiving member 24 on the housing 2 side is connected to the rotor 23 of the lock unit 22 incorporated in the operation handle 3.
By rotating the key 27 inserted into the key hole 26 of the rotor 23, the pull-out constraint of the operation handle 3 with respect to the housing 2 is released. The receiving member 24 slidably accommodated in the housing 2 is formed with a latching portion 28 for engaging and disengaging the stopper member 25, and the plunger 30 of the solenoid 29 mounted on the housing 2 receives the receiving metal. The member 24 is coupled and the receiving member 24 is biased and held at a position where it engages with the stopper member 25.

Energizing the solenoid 29 or the key 27
When the stopper switch 25 is disengaged from the stopper member 25 and the receiving switch 24 is fixed by fixing the detection switch 31 to the housing 2, the stopper switch 25 is detected when the stopper switch 25 comes to a position where it is separated from the receiving member 24. An intermediary member 32 that operates the switch 31 is inserted between the detection switch 31 and the clasp member 25. A cam surface portion 33 is formed on the receiving member 24 to move the receiving member 24 to the retracted position when the operation handle 3 is pushed into the housing 2.

According to this composite lock mechanism, the door 1 is closed as shown in FIG. 1, and the door 1 is attached to the fixed frame body 8 such as the equipment box body by the lock member 17 connected to the locking main shaft 5. When the door is locked so that it cannot be opened, the main portion of the operation handle 3 is housed in the housing 2, and the stopper member 25 of the lock unit 22 engages with the latch portion 28 of the receiver member 24. As a result, the operation handle 3 is constrained against the housing 2 so that it cannot be pulled out.

When an operator is dispatched to the equipment box for operation or inspection / repair of the equipment stored in the equipment box, the administrator of the equipment box pushes a switch on the control panel at a station located away from the installation location of the equipment box. The solenoid 29 is turned on to supply a predetermined current as an unlock signal to the solenoid 29. Since the plunger 30 is attracted to the solenoid body side by the excitation of the solenoid 29, the receiving member 24 is pulled back and slid, and the engagement between the latching portion 28 and the stopper member 25 is released.

At this time, since the lock unit 22 is not operated at all, the catch member 25 remains protruding to the initial position. When the operator dispatched to the site pulls out the operation handle 3 from the housing 2, the stopper member 25 moves to the outer space of the housing 2 without hitting the inner wall portion of the housing 2. After the pulling-out rotation of the operation handle 3 is completed, the solenoid 29 is de-energized, and the money receiving member 24 causes the plunger 29 of the solenoid 29 to move.
The urging force of the urging spring 34 returns to the original position in which the lock unit 22 is approached.

As shown in FIG. 4, when the locking main shaft 5 is rotationally driven by grasping the operating handle 3 which is pulled out from the housing 2 and rotated, the lock member 17 connected to the locking main shaft 5 is rotated.
Is released from the receiving portion 21 on the fixed frame body 8 side, and the door 1 is unlocked from the fixed frame body 8. Therefore, the door 1 is opened by pulling the operation handle 3 toward you.

When the operator pushes the operating handle 3 back into the housing 2 after the inspection and repair of the equipment, the tip of the stopper member 25 pushes the cam surface 33 of the receiver member 24, so that the receiver member 24 is pushed. Resists the urging force of the spring 34 and temporarily slides toward the solenoid body to allow the stopper plate 25 to pass therethrough. The tip of the stopper member 25 is the hook portion 28.
When passing through the position, the receiving member 24 is slid back by the urging force of the spring 34, and the tip end portion of the stopper member 25 is re-engaged with the retaining portion 28 of the receiving member 24.

If the pulling-out constraint of the operating handle 3 is not released even when the unlocking signal is sent to the solenoid 29, the solenoid 29 itself is defective or the energization system to the solenoid 29 is defective. In such an emergency, the key 27 of the lock unit 22 is used to manually unlock the lock. Lock unit 2
The key 27 is inserted into the key hole 26 of the rotor 23 of
When 3 is rotated in a predetermined direction, the clasp member 25 interlocked with the rotor 23 is pulled back to the lock unit 22 side, and the clasp member 25 engages with the latching portion 28 of the receiving member 24.
Leave from. As a result, the operation handle 3 can be pulled out from the housing 2.

When the clasp member 25 is pulled back to the unlocked position as described above, the intermediary member 32 is urged by gravity or by the built-in spring of the detection switch 31.
Slides away from the detection switch 31. Since the detection switch 31 is turned on by the sliding movement of the intermediary member 32, the notification means such as the indicator light of the management panel in which the detection switch 31 is inserted operates to notify the fact of manual unlocking. The detection signal is input to the storage device, and the execution time of the manual unlocking is recorded and managed.

When the solenoid 29 itself and the energization system to the solenoid 29 are inspected and repaired, or when the operator pushes the operation handle 3 back into the housing 2 after finishing the inspection and repair of the equipment, the clasp member 25 is a lock unit. It is held at the position pulled back to the 22 side. Therefore, the operation handle 3 is pushed back into the housing 2 without the clasp member 25 interfering with the money receiving member 24.

After the operation handle 3 has been housed in the housing 2 in a predetermined manner, the rotor 23 of the lock unit 22 is rotated in the opposite direction by the key 27.
Is projected and slid toward the solenoid 29 side. The intermediary member 32 is pushed back to the solenoid 29 side by the protruding slide of the stopper plate 25, the actuator 35 of the detection switch 31 is pressed again, and the detection switch 31 is turned off.

The lock unit 22 is embedded and fixed to the tip of the operation handle 3, and a known disc tumbler lock mechanism is used as an internal lock mechanism for locking the rotor 23 in the lock body. A drive cam projection 36 is provided on the rear end surface of the rotor 23 at a position eccentric from the center of rotation. The plate-shaped clasp member 25 is formed with a passive groove hole 37 in the lateral width direction thereof, and when the rotor 23 is rotated, the cam projection 36 pushes the inner surface of the groove hole 37 so that the clasp member is formed. 25 moves back and forth. The stopper member 25 is inserted in a vertical guide groove 38 formed in the operation handle 3.

A thick plate-shaped receiving member 24 is attached to the inner case 40 fixed to the inner wall of the housing 2 by a fixing member 39 and arranged on the back side of the accommodation space of the operation handle 3.
Are housed so as to be slidable in the vertical direction. Inner case 4
The detection switch 31 is fastened and fixed by a bolt 42 and a nut 43 to the back plate portion 41 facing the zero receiving member 24. A plate-shaped intermediary member 32 is vertically slidably inserted between the rear plate portion 41 and the receiving member 24, and the interlocking protrusion 4 formed on the front surface side of the intermediary member 32.
4 engages with the pulling protrusion 45 on the back side of the receiving member 24.

When the unlock signal is supplied to the solenoid 29 and the plunger 30 is attracted to the solenoid body side, the intermediate member 32 is pulled by the pulling projection 45 and moves upward together with the receiving member 24 to the retracted position. To do. Therefore, when the operation handle 3 is pulled out from the housing 2, the intermediary member 32 does not interfere with the stopper member 24. Further, when the solenoid 12 is energized when the operation handle 3 is pushed back, the intermediary member 32 causes the interlocking member 2 to move.
No interference with 5.

A transverse split groove portion 46 and a vertical groove portion 47 intersecting with the split groove portion 46 in a T-shape are formed on the upper end portion of the receiving member 24. At the lower end of the plunger 30 of the solenoid 29, a large-diameter shaft portion 48 fitted in the split groove portion 46.
Is formed, and the small-diameter shaft portion 4 at the base of the large-diameter shaft portion 48 is formed.
9 is fitted in the vertical groove portion 47. By this fitting, the receiving member 24 is connected so as to be accurately interlocked with the suction and pushing operations of the plunger 30.

The detection switch 31 is composed of a micro switch, and its lead wire 50 is led to the outside of the housing 2 like the lead wire of the solenoid 29. A display means 51 such as a light emitting diode is provided on the upper front surface of the inner case 40, and a transparent plastic display window 52 is provided at a corresponding portion of the operation handle 3. The display means 51 is configured to light up when the actuator 35 of the detection switch 31 is pushed up by the intermediary member 32, and displays that the operation handle 3 is constrained so that it cannot be pulled out.

On the back side of the operating handle 3, there is formed a receiving hole 53 which is bent inside. A bent finger-shaped locking projection 54 that elastically engages with the receiving hole 53 when the operation handle 3 is housed in the housing 2 is formed in the lower portion of the front surface of the inner case 40, and the operation handle 3 has a predetermined shape. It is held more stably in the storage position. The tip end of the operation handle 3 slightly protrudes from the lower end of the housing 2 and serves as a finger hook 20.

In the drawer rotation operation type door lock handle device of the above embodiment, the solenoid 29 is mounted on the housing 2, and the latch portion 28 is formed on the receiving member 24 slidably mounted on the housing 2. And solenoid 2
By connecting the receiving member 24 to the plunger 30 of No. 9 and supplying a predetermined current as an unlocking signal to the solenoid 29, the engagement between the hook portion 28 of the receiving member 24 and the stopper member 25 can be released. Therefore, the administrator of the equipment box directly goes to the installation location of the equipment box and uses the key 27 to lock the lock unit 2
It is possible to set specific one or more device boxes to the openable state by remote operation without needing to unlock 2, and perform the device door open management centrally at one place. You can

In the event of an emergency when the solenoid 29 itself or the energization system of the solenoid 29 fails, the key 27 is inserted into the rotor 23 of the lock unit 22 and the latch member 25 is pulled back to operate. 24
Since the engagement between the receiving member 25 and the receiving member 25 can be released, it does not hinder the opening and maintenance of the equipment box.
Since the intermediary member 32 that activates the detection switch 31 when the clasp member 25 comes to the position where the clasp member 25 is separated from the clasp member 24 is inserted between the detection switch 31 and the clasp member 25, the insertion rotation of the key 27 causes It is possible to accurately detect the unlocking and sequentially display it on a required display panel, and record and manage the execution time of the manual unlocking.

Further, when the operation handle 3 is pushed into the housing 2, a cam surface portion 33 for moving the receiving member 24 to the retracted position is formed on the receiving member 24.
Even after the energization of the solenoid 29 is cut off after the operation handle 3 is pulled out, the stopper member 25 and the stopper member 24 are automatically moved after being pushed by the stopper member 25 and the receiving member 24 once retracts and slides. Will be re-engaged. Even when manually unlocked in this way, the automatic lock mechanism is used in the returning operation, so that the user does not forget to lock the key and the administrator does not have to go to the installation location of the device box to confirm the lock.

[0039]

As described above, in the drawer rotary door lock handle device according to the first aspect of the present invention, the convex arc surface 9 or the concave arc surface 10 formed on the operation handle 3 or the locking main shaft 5 is either Also, since the center of curvature is at the center of the transverse pivot 7, and the receiving hole 11 is formed in the front-back direction of the locking main shaft 5 or the operating handle 3, the elastic repulsive force of the spring member 13 is directed toward the center of the transverse pivot 7. The elastic repulsive force of the spring member 13 does not act as a moment for rapidly rotating the operation handle 3 when the operation handle 3 is retracted. Therefore, according to the invention of claim 1, the operation handle can be accurately held at the initial withdrawal angle without increasing the depth dimension of the entire device due to the small number of constituent parts, and
(EN) Provided is a lock handle device for a drawer rotation operation type door, which does not generate an unpleasant collision sound or harmful vibration impact when the operation handle is immersed.

According to the second aspect of the invention, the arcuate groove 15 with which a part of the sphere 12 is constantly engaged is formed in the convex arcuate surface 9 or the concave arcuate surface 10, and the recess 14 is formed in the arcuate groove 15.
When the operation handle 3 is pulled out and rotated to a predetermined angle, the spherical body 12 engages with the total depth of the arcuate groove 15 and the concave portion 14,
The holding force of the operation handle 3 is improved.

[Brief description of drawings]

FIG. 1 is a front view of a drawer rotation operation type door lock handle device according to an embodiment of the present invention, in which a door is closed and locked.

2 is a left side view of the door lock handle device of FIG. 1. FIG.

FIG. 3 is a cross-sectional view of the door lock handle device of FIG. 1 taken along the line AA.

FIG. 4 is a vertical cross-sectional view of the door lock handle device of FIG. 1 taken along the line AA, showing a state in which the engagement of the stopper member and the receiving member is released by energizing the solenoid.

5 is a sectional view of the door lock handle device of FIG. 1 taken along line BB.

6 is a cross-sectional view of the door lock handle device of FIG. 1 taken along the line BB, showing a state when the engagement of the stopper member and the receiving member is released by energizing the solenoid.

7 is a front view of a locking spindle used in the door lock handle device of FIG. 1. FIG.

FIG. 8 is a rear view of the base end connecting portion of the operation handle used in the door lock handle device of FIG. 1.

FIG. 9 is a cross-sectional view corresponding to FIG. 6 of a lock handle device for a drawer rotation operation type door according to another embodiment of the present invention.

[Explanation of symbols]

1 door 2 housing 3 operation handle 4 Base end connection 5 Locking spindle 6 Front end connection 7 transverse axis 8 fixed frame 9 Convex arc surface 10 concave arc surface 11 receiving hole 12 spheres 13 Spring member 14 recess 15 arcuate groove

Claims (2)

[Claims] 1. A housing 2 fixed to a door 1 accommodates the whole or a main part of an operating handle 3 in a retractable manner, and a base end connecting portion 4 of the operating handle 3 is crossed to a front end connecting portion 6 of a locking main shaft 5 by a transverse pivot. 7, the operation handle 3 is pulled out from the housing 2 about the transverse axis 7 and rotated by a predetermined angle, and then the locking main shaft 5 is rotated by the operation handle 3 to lock the door 1 with respect to the fixed frame body 8. In the lock handle device for the drawer rotation operation type door that is configured to release the lock, the transverse pivot shaft 7 is provided on either the rear side of the proximal end connecting portion 4 of the operation handle 3 or the front side of the front end connecting portion 6 of the locking main shaft 5. A convex arc surface 9 having the center of curvature is formed, and a concave shape having the transverse pivot axis 7 as the center of curvature is formed on the other side of the rear side of the proximal end connecting portion 4 of the operation handle 3 and the front side of the front end connecting portion 6 of the locking main shaft 5. Arc surface 10 Formed, and a receiving hole 11 is formed in the locking main shaft 5 or the operating handle 3 in the front-rear direction by opening the concave arc surface 10 or the convex arc surface, and the sphere 12 accommodated in the receiving hole 11 so as to be movable in the front-rear direction. The spring member 13 is urged in the projecting direction, and when the operation handle 3 is pulled out from the housing 2 to a predetermined angle, a part of the spherical body 12 is pressed and engaged with the recessed portion 14.
Is formed on the convex arc surface 9 or the concave arc surface 10, and a lock handle device for a drawer rotation operation type door. 2. The convex arc surface 9 or the arcuate groove 15 in which a part of the sphere 12 is always engaged and in which the part of the sphere 12 moves in response to the withdrawal rotation of the operating handle 3. The concave arc surface 10 is formed, and the concave portion 14 is formed in the arc groove 15.
The lock handle device for the drawer rotation operation type door according to claim 1, wherein the lock handle device is formed on a part of the door.