HK1154062B - A lock handle assembly for doors - Google Patents

Description

Locking handle device for door

Technical Field

The present invention relates to a door locking handle device for locking a door with respect to a fixed frame when an operating handle is in a state of being submerged in a case body.

Background

There is a door locking handle device having an automatic locking function in which an operation handle is automatically locked to a housing body by a single operation of pressing the operation handle into a predetermined position of a front recess of the housing body after a door is closed and locked (see patent document 1).

In the door lock handle device of patent document 1, a latch body and a lock unit are housed in one end portion of a housing body, the latch body is urged forward by a spring toward a front end portion of an operation handle to engage and disengage an engagement claw portion with an engagement seat portion of the operation handle, and on the one hand, when a key cylinder (rotor) is in an unlocked position, the lock unit is pressable in a direction intersecting the latch body, on the other hand, when the key cylinder is in a locked position, the lock unit is not pressable, and when the key cylinder is pressed in, the lock unit drives the latch body backward in a direction to release the engagement between the engagement claw portion and the engagement seat portion.

Further, a cam slope is provided on an inner wall surface of a base end portion of a slot hole provided in the latch body, an operation portion capable of entering the slot hole is provided in a protruding manner on a rear end portion of the lock unit, a driving slope in sliding contact with the cam slope of the latch body is provided on a front end portion of the operation portion, a rear end portion of the lock cylinder is formed into a modified cross section formed by a pair of long sides and a pair of short sides intersecting both ends thereof, a length of the long sides is set to be larger than an opening width of the slot hole of the latch body, and a length of the short sides is set to be equal to or smaller than the opening width of the slot hole, when the key cylinder is at a locking position with respect to the lock unit, the long side is arranged in a direction intersecting the slot, when the key cylinder is in an unlocked position with respect to the lock unit, the long side is arranged in a direction aligned with the slot.

In the door locking handle device having the automatic locking function according to the above-described conventional example, since the lock unit is embedded in the housing body, the length of the entire housing body becomes long, and the area occupied by the front surface of the door of the device becomes large.

In addition, in the door locking handle device of the conventional example in which the lock unit adopts the button structure for operating the latch body, since the number of parts of the automatic locking mechanism portion is large and the structure is not simplified, the manufacturing cost is increased.

Patent document 1: japanese patent No. 2883560

Disclosure of Invention

The invention provides a door locking handle device which is easy to miniaturize the whole device by arranging an automatic locking mechanism part at the lower end part of an operation handle.

Another object of the present invention is to provide a door locking handle device which can reduce the manufacturing cost of the entire device by reducing the number of parts of an automatic locking mechanism and simplifying the structure.

It is another object of the present invention to provide a door locking handle device which can easily and accurately perform a series of operations of releasing an automatic locking mechanism and withdrawing an operating handle with a fingertip of one hand without imposing a burden on a tumbler (knob) and a key bit of a lock unit, and which is convenient in operation.

The invention according to claim 1 is characterized in that in the door locking handle device, an operating handle is housed in a vertically long front recess of a case body fixed to a door, an upper lock shaft is housed in a bearing cylinder portion on a rear side of an upper end of the case body, a front end boss portion of the upper lock shaft is connected to a head portion of the operating handle by a horizontal pivot shaft, the operating handle is rotatably drawn out from the front recess about the horizontal pivot shaft, the operating handle is rotated about the upper lock shaft, a stopper plate fixed to the upper lock shaft is separated from a receiving portion on a fixed frame side, locking of the door to the fixed frame body is released, a lock embedding portion is formed in a front-rear direction at a lower end portion of the operating handle, a guide hole is formed in a vertical direction so as to be orthogonal to a rear end portion of the lock embedding portion, and a plate-like spring lock body is inserted in the guide hole so as to be slidable in the vertical direction, a lock claw portion which engages with and disengages from a lock groove portion of a back surface wall portion of the case body is formed at an upper end portion of the latch body, a spring support portion of a spring member for urging the latch body is formed at a lower end portion of the latch body, a rectangular cam follower hole is formed at an intermediate portion of the latch body, a lock unit is embedded and fixed in the lock embedding portion, a drive cam projection formed by offsetting a rotation center of a rear end portion of a key cylinder of the lock unit is inserted into the cam follower hole of the latch body, both a longitudinal dimension and a lateral dimension of the cam follower hole are larger than a diameter of the drive cam projection, a cam slant portion which slidably contacts with a back surface portion of the lock claw portion of the latch body is formed at a position forward of the lock groove portion on the back surface wall portion of the case body, and the key cylinder is rotated by a key inserted into a key hole of the key cylinder, when the lock cylinder is stopped by the key, the locking pawl of the latch body projects from the guide groove hole by a push-up urging force of the spring member by a difference between a longitudinal dimension of the cam follower hole and a diameter of the drive cam protrusion, and when the operating handle is pushed into the front recess of the housing body, a back surface portion of the locking pawl is pushed by the cam slope portion on the housing body side, and the latch body is pushed into the guide groove hole against the push-up urging force of the spring member.

The features of the invention according to claim 2 are, in addition to the above-described features of the invention according to claim 1: the longitudinal dimension of the operation handle is set to be shorter than the longitudinal dimension of the front concave part of the shell body, and by utilizing the dimension difference of the longitudinal dimensions, when the operation handle is in an embedding state, a fingertip insertion part is formed at the lower end part of the front concave part, and a fingertip hooking part for defining the upper side of the fingertip insertion part is formed at the lower end part of the operation handle.

In the invention according to claim 1, in a locked state in which the door is closed and the stopper plate and the receiving portion are engaged with each other, the operation handle is pushed into the front recess of the housing body, and the locking claw portion of the latch spring body is engaged with the locking groove portion on the housing body side, thereby holding the operation handle at the retracted position. The engagement state of the latch body and the lock groove is maintained by the push-up urging force of the spring member housed in the guide groove hole of the operation handle.

By rotating a key inserted into a key hole of the key cylinder, the lower side portion of the cam follower hole is pressed by the side surface portion of the drive cam protrusion, the latch body is pulled back into the guide groove hole, the locking claw portion of the latch body is disengaged from the locking groove portion of the housing body, and the locking of the housing body by the operating handle is released.

The operation handle is drawn out obliquely toward the upper surface side of the case body with the horizontal pivot as a center in a state where the key is held at the initial rotational position. When the key is pulled out from the key hole of the key cylinder, the latch body is pushed up by the pushing-up force of the spring member, and the locking claw portion protrudes from the guide groove hole. Then, by rotating the operation handle about the upper lock shaft, the engagement between the stopper plate and the receiving portion is released, and the locking of the door with respect to the fixed frame is released.

After the door is opened and the required operation is finished, the door is closed again, the operating handle is rotated reversely around the upper locking shaft, the stop plate is engaged with the bearing part, and the door is locked again relative to the fixed frame.

Then, the operating handle is rotated about the horizontal pivot shaft and pressed into the front recess of the case body, and at the final stage of the rotation and pressing, the back surface portion of the locking pawl portion of the latch body abuts against the cam slope portion of the back surface wall portion of the case body. After the abutment, the operating handle is further pressed in, the latch is pressed down by the cam slant, and the locking claw enters the guide groove hole. At the moment when the operating handle is correctly pressed into the front recess of the case body and the guide groove hole is opposed to the lock groove portion, the latch body is moved upward by the upward urging force of the spring member, and the lock claw portion is engaged with the lock groove portion again.

As described above, the door locking handle device according to the invention of claim 1 has an automatic locking function of locking the operation handle by the case body by a single operation of pressing the operation handle into the case body, and the automatic locking mechanism section includes: the lock unit embedded in the lower end part of the operating handle, the plate-shaped spring lock body inserted into the guide slot hole of the operating handle, the locking slot part of the back wall part of the shell body, the spring member inserted between the bottom of the guide slot hole and the spring support part of the spring lock body, the driving cam protrusion eccentrically formed at the rear end part of the lock core of the lock unit, and the cam inclined plane part of the back wall part of the shell body.

In addition, since the main portion of the automatic lock mechanism is built in the lower end portion of the operation handle itself, the length of the case body can be shortened, and the entire device can be downsized.

In addition to the above-described effect of the invention according to claim 1, the invention according to claim 2 is advantageous in that the longitudinal dimension of the operation handle is set to be shorter than the longitudinal dimension of the front recess of the case body, the difference in the longitudinal dimensions between the operation handle and the case body enables a fingertip insertion portion to be formed at the lower end portion of the front recess in the state where the operation handle is submerged, and the fingertip engaging portion defining the upper side of the fingertip insertion portion is formed at the lower end portion of the operation handle in proximity to the lock unit embedding portion, so that the following operation is facilitated: the other finger of the hand holding the finger of the key is inserted into the fingertip insertion portion, and the fingertip is put on the fingertip hooking portion, so that the operation handle can be pulled out from the case body by one hand.

If there is no finger tip hooking portion near the embedded portion of the lock unit on the operating handle, the key must be pulled forward in a state of being turned to the locking contact position, and the operating handle must be rotationally pulled out by a coil spring (discomber) loaded in the key cylinder of the lock unit, a hook of a pin tumbler (pintumbler) and a key bit.

In the present invention, since the operating handle is rotated and pulled out by putting the fingertip against the fingertip hooking portion located at a position close to the lock unit in a state where the key is held at the unlock position, the contact portion of the tumbler (tumbler) with the key bit and the key bit itself are not excessively burdened.

Drawings

Fig. 1 is a drawing-out rotation operation type door locking handle device according to an embodiment of the present invention.

Fig. 2 is a rear view of the door locking handle assembly of fig. 1.

Fig. 3 is a left side view of the door locking handle assembly of fig. 1.

Fig. 4 is a right side view of the door locking handle assembly of fig. 1.

Fig. 5 is a plan view of the door locking handle assembly of fig. 1.

Fig. 6 is a bottom view of the door locking handle assembly of fig. 1.

Fig. 7 is a sectional view taken along line a-a of fig. 1.

Fig. 8 is an enlarged explanatory view of an automatic locking mechanism portion in the door locking handle device of fig. 1.

(symbol description)

1 fixed frame

2 front opening of fixed frame

3 door

4 casing body

5 opening for fixing shell body

6 outer peripheral flange of case body

7 gasket body

8 bearing hole of gasket body

9 back wall of the case body

10 shim

11 front recess of case body

12 operating handle

13 bearing cylinder part of shell body

14 locking shaft

15 front end shaft sleeve part of upper lock shaft

16 outer peripheral groove portion of upper lock shaft

17 horizontal pivot

18 stop plate

19 receiving part for fixing frame side

20 rear end corner shaft part of upper lock shaft

21 rotation angle limiting disk

22 gasket

23 bolt

24 bevel of head of operating handle

25 bevel of head of operating handle

P meeting ridge between slopes

Central axis of L-shaped upper lock shaft

26 slotted part of operating handle

27 spring plate

28 finger tip insertion part with front concave part

29 finger tip clasp part of operating handle

30 lock embedding part of operating handle

31 guide slot hole of operating handle

32 spring lock body

33 locking groove part of shell body

34 locking claw of spring lock body

35 spring component

Spring support of 36 spring lock body

Cam follower hole of 37 spring lock body

38 lock unit

39 lock core of lock unit

40 drive cam projection

41 back face portion of locking claw portion

42 cam ramp portion on housing body side

43 keyhole of lock cylinder

44 Key

45 ring finger

46 tapping screw

47O-ring

48 coil spring of lock unit

Detailed Description

In the illustrated embodiment, the door 3 for opening and closing the front opening 2 of the fixed frame 1 such as the equipment storage box body is attached to the fixed frame 1 by a hinge not shown on the right side of fig. 5. A fastening opening 5 of the case body 4 is formed at the left end of the door 3. An outer peripheral flange portion 6 of the case body 4 fitted into the fixing opening 5 from the front side of the door 3 abuts against the front side of the door 3. The gasket body 7 having a U-shaped cross section is covered from the back surface side of the case body 4, and 2 tap screws 46 passed through the receiving holes 8 of the gasket body 7 are screwed into the back surface wall portion 9 of the case body 4, whereby the gasket body 7 is fastened to the back surface of the door 3 by the gasket 10.

The operation handle 12 is housed in a vertically long front recess 11 of the case body 4 fixed to the door 3 so as to be able to project and sink, and the upper lock shaft 14 is housed in a bearing tube 13 on the upper end back side of the case body 4. An O-ring 47 is housed in the outer peripheral groove portion 16 of the upper lock shaft 14. A head portion 16 of the operation handle 12 is connected to a front end boss portion 15 of the upper lock shaft 14 via a horizontal pivot 17, and the operation handle 12 is rotatably drawn out from the front recess 11 about the horizontal pivot 17. The operation handle 12 projecting obliquely from the case body 4 is rotated about the upper lock shaft 14, so that the stopper plate 18 is disengaged from the receiving portion 19 on the fixed frame body side, and the locking of the door 3 with respect to the fixed frame body 1 is released.

The stopper plate 18 is fitted to a rear end angular shaft portion 20 of the upper lock shaft 14, and is fixed to the upper lock shaft 14 by a bolt 23 via a rotational angle restricting plate 21 and a washer 22. Inclined surfaces 24, 25 inclined in opposite directions are formed on the back surface of the head portion 16 of the operating handle 12, and a front end boss portion 15 of the upper lock shaft 14 is inserted into a groove portion 26 extending through the inclined surfaces 24, 25. A spring plate 27 is fitted to the root of the distal boss portion 15, and the spring plate 27 is compressed by the head portion 16 of the operating handle 12. Specifically, the meeting ridge of the two inclined surfaces 24 and 25 of the head 16 is pressed against the front surface of the spring plate 27 at a point P, and when the operation handle 12 is correctly inserted into the front recess 11 of the housing body 4, the pressing point P is located on the upper side of the central axis L of the upper lock shaft 14. Therefore, the elastic repulsive force of the spring plate 27 acts in the counterclockwise direction about the horizontal pivot 17 in fig. 7, and the operation handle 12 is held in the above-described retracted state.

The longitudinal dimension of the operation handle 12 is set shorter than the longitudinal dimension of the front face recess 11 of the case body 4, and the difference in the longitudinal dimensions thereof makes it possible to form the fingertip insertion portion 28 at the lower end portion of the front face recess 11 in the submerged state of the operation handle 12. A fingertip engaging portion 29 defining an upper side of the fingertip insertion portion 28 is formed at a lower end portion of the operating handle 12.

At the lower end portion of the operating handle 12, a lock embedding portion 30 is formed in the front-rear direction, and a guide groove hole 31 is formed in the up-down direction so as to be orthogonal to the rear end portion of the lock embedding portion 30. A plate-shaped spring lock body 32 is slidably inserted into the guide slot hole 31 in the up-down direction. A locking claw portion 34 that engages with and disengages from a locking groove portion 33 provided in the back surface wall portion 9 of the case body 1 is formed at an upper end portion of the latch body 32. The spring receiving portion 36 of the spring member 35 that urges the spring lock body 32 upward is formed at the lower end portion of the spring lock body 32. A rectangular cam follower hole 37 is formed in the middle portion of the latch body 32. The lock unit 38 embedded and fixed in the lock embedding portion 30 is a well-known cylinder type lock, and a driving cam protrusion 40 eccentric from the rotation center is formed at the rear end portion of the key cylinder 39 of the lock unit 38.

The cam follower hole 37 of the spring lock body 32 into which the driving cam protrusion 40 is inserted is set to have a longitudinal dimension and a lateral dimension larger than the diameter of the driving cam protrusion 40. On the back surface wall portion 9 of the case body 4, a cam slope portion 42 which is brought into sliding contact with the back surface portion 41 of the locking claw portion 34 of the latch body 32 is formed at a front position of the locking groove portion 33.

When the key 44 inserted into the key hole 43 of the key cylinder 39 is rotated by a predetermined angle (140 degrees in the present embodiment) in a predetermined direction, the lower edge 45 of the cam follower hole 37 is pressed by the side surface of the drive cam projection 40, the latch body 32 is retracted in the guide groove hole 31, and the locking claw portion 34 of the latch body 32 is disengaged from the locking groove portion 33 of the case body 4.

After the lock of the case body 4 by the operation handle 12 is released in this way, a finger of the same hand other than the thumb and the index finger, for example, the ring finger 45, which has pinched the key 44 is inserted into the fingertip insertion portion 28, and then the fingertip of the finger is put on the fingertip hooking portion 29, and the operation handle 12 is rotated and extracted from the case body 4. At the moment when the contact point P between the meeting ridge of the inclined surfaces 24 and 25 of the head portion 16 of the operation handle 12 and the spring plate 27 gets downward beyond the central axis L of the lock shaft 14, the direction of the elastic repulsive force of the spring plate 27 is reversed, and the operation handle 12 is rotationally protruded from the housing body 4 by the biasing force of the spring plate 27.

Since the rotation operation of the key 44 and the withdrawal operation of the operating handle 12 can be performed by the fingers of the same hand, there is operational convenience.

When the key 44 stops the rotation of the key cylinder 39, the lock pawl 34 of the latch body 32 is projected upward from the guide groove hole 31 by the push-up urging force of the spring member 35 formed of a compression coil spring, and the projection height is a difference between the vertical dimension of the cam follower hole 37 and the diameter of the drive cam projection 40. At this stage, the operating handle 12 is in an obliquely protruding state, and therefore, an unexpected malfunction such as re-engagement of the locking claw portion 34 with the guide groove hole 31 does not occur.

After the door 3 is opened and the required operation is finished, the door 3 is closed again, the operation handle 12 is rotated in the reverse direction around the upper lock shaft 14, the stopper plate 18 is engaged with the receiving portion 19, and the door 3 is locked again with respect to the fixed frame 1.

Thereafter, the operation handle 12 is rotationally pushed into the front recess 11 of the case body 4 about the horizontal pivot shaft 17, and at the final stage of the rotational pushing, the back surface portion 41 of the locking pawl portion 34 of the latch body 31 abuts against the cam slope portion 42 of the back surface wall portion 9 of the case body 4. When the operating handle 12 is further pushed in after the abutment, the latch 32 is pushed down by the cam ramp 42, and the locking claw 34 enters the guide groove hole 31. When the operating handle 12 is correctly pushed into the front recess 11 of the case body 4 and the lock groove 33 and the guide groove hole 31 face each other vertically, the latch body 32 is moved upward by the upward urging force of the spring member 35, and the lock claw 34 is engaged with the lock groove 33 again. That is, the locking of the operating handle 12 to the case body 4 is automatically achieved.

The back surface portion 41 of the locking pawl portion 34 of the latch body 32 is formed as a curved surface. In the present embodiment, the lock unit 38 uses a well-known cylinder lock of a disc spring type (disco), in which a spool 48 is filled in a cylinder core 39, but the lock unit may also use a well-known cylinder lock of a pin spring type (pintumbrertype).

Claims (1)

1. A door lock handle device in which an operating handle is housed in a front recess portion that is long in the longitudinal direction of a case body to be fixed to a door, an upper lock shaft is housed in a bearing cylinder portion on the upper end back surface side of the case body, a front end boss portion of the upper lock shaft is connected to a head portion of the operating handle by a horizontal pivot shaft, the operating handle is rotatably drawn out from the front recess portion around the horizontal pivot shaft, and then the operating handle is rotated around the upper lock shaft, so that a stopper plate fixed to the upper lock shaft is disengaged from a receiving portion on the fixed frame body side, and locking of the door with respect to the fixed frame body is released,

a lock embedding portion is formed at a lower end portion of the operating handle in a front-rear direction, a guide groove hole is formed in a vertical direction so as to be orthogonal to a rear end portion of the lock embedding portion, a plate-shaped spring lock body is inserted into the guide groove hole in a vertically slidable manner, a locking claw portion which engages with and disengages from a locking groove portion of a back wall portion of the case body is formed at an upper end portion of the spring lock body, a spring support portion of a spring member for urging the spring lock body is formed at a lower end portion of the spring lock body, a rectangular cam follower hole is formed at an intermediate portion of the spring lock body, a lock unit in which a drive cam projection formed at a rear end portion of a key cylinder is offset from a rotation center is inserted into the cam follower hole of the spring lock body is embedded and fixed in the lock embedding portion,

the cam follower hole has a longitudinal dimension and a lateral dimension both larger than a diameter of the drive cam protrusion, a cam slope portion that is in sliding contact with a back surface portion of the locking pawl portion of the spring lock body is formed at a front side position of the locking groove portion on a back surface wall portion of the case body, the cam slope portion of the case body is formed as a curved surface that protrudes toward a front side, the back surface portion of the locking pawl portion of the spring lock body is formed as a curved surface that protrudes toward a rear side,

rotating the key cylinder with a key inserted into a key hole of the key cylinder to press a side surface portion of the drive cam protrusion against a lower side portion of the cam follower hole, thereby retracting the latch body in the guide groove hole and disengaging the locking claw portion of the latch body from the locking groove portion of the case body, and on the other hand, when stopping the rotation of the key cylinder using the key, when the operating handle is pressed into the front recess of the case body by pushing up the spring member to urge the locking pawl portion of the latch lock body to protrude from the guide slot hole by a difference between a longitudinal dimension of the cam follower hole and a diameter of the drive cam protrusion, the back surface of the locking claw is pressed by the cam bevel part on the side of the shell body, overcomes the pushing-up force of the spring member, and presses the spring lock body into the guide slot hole.