HK1027995B - Flush handle assembly - Google Patents

Description

Planar handle device

The invention relates to a flat handle device, wherein the handle can be kept in a housing when the handle is flat, and can be rotated and projected from the housing when a door is opened, and a stop tongue piece on the back side surface of the housing can be rotated and driven to an unlocking position.

In the flat handle device disclosed in japanese utility model laid-open publication No. sho 45-28779, a base end portion of a handle rotating in a plane perpendicular to a front surface of a case is pivotally supported by a pivot shaft in left and right directions on left and right side walls of the case, a stopper tongue rotating in a plane parallel to the front surface of the case is pivotally supported by a pivot shaft in front and rear directions on a back surface of the case, the handle is rotationally biased in a protruding direction and a sinking direction by a spring interposed between the handle and the case, an operation protrusion provided at the base end portion of the handle is inserted into a passive hole provided in the stopper tongue, and when the handle is pulled out, an outer side surface of the operation protrusion pushes a hole edge portion of the passive hole to rotationally drive the stopper tongue.

In such a flat handle device, the housing and the handle are formed by zinc die casting or aluminum die casting for the sake of good economy in manufacturing and processing, while the stopper tongue is press-formed by an iron plate for the sake of securing the strength as the locking member, and the hardness of the material of the stopper tongue and the handle is greatly different.

Therefore, in the process of repeating the operation of rotating the stopper tongue by pressing the operation projection of the handle, the outer side surface of the operation projection which is in contact with the hole edge portion of the driven hole of the stopper tongue is gradually scratched, and if the scratch is more than a certain level, the hole edge portion of the driven hole bites into the scratch portion deeply formed in the V-groove shape, and the stopper tongue cannot rotate.

In such a case, if the handle is forcibly pulled out and pushed in and the stopper tongue is rotated, an excessive bending force acts on the operation protrusion by using the main body of the handle as the lever arm, so that stress is concentrated in the scraped portion and the operation protrusion is broken.

Even if the hardness of the material of the handle and the stopper tongue is made the same or similar, it is inevitable that the scratch portion on the outer side surface of the operation protrusion is developed sooner or later by the hole edge portion of the passive hole, and the seizure accident of the stopper tongue and the operation protrusion of the handle is reported.

Accordingly, an object of the present invention is to provide a flat surface handle device which does not cause the engagement of the stopper tongue piece with the operation protrusion of the handle due to repeated use and which can be operated smoothly for a long period of time.

The following is explained with reference to the drawings. A flat handle device in which the base end of a handle 2 rotating in a plane perpendicular to the front surface of a case 1 is pivotally supported by a left-right pivot shaft 3 to the case 1, a pusher 4 moving linearly in parallel to the front surface of the case 1 in conjunction with the rotation of the handle 2 is provided to the case 1, an operation protrusion 5 is provided on the back surface side of the pusher 4, a stopper tongue 6 rotating in a plane parallel to the front surface of the case 1 is pivotally supported on the back surface side of the case 1 by a front-back pivot shaft 7, the operation protrusion 5 of the pusher 4 is inserted into a passive hole 8 of the stopper tongue 6, and when the handle 2 is not rotated in the case 1, the outer surface 5a of the operation protrusion 5 is brought into surface contact with the inner surface 8a of the passive hole 8 of the stopper tongue 6 to rotate the stopper tongue 6 to a locking position or an unlocking position.

The case 1 is fixed to, for example, a door 9 of an equipment storage box, and when the handle 2 is in a state of being retracted into the case 1, the stopper tongue 6 is in a locked position, and a tip end portion of the stopper tongue 6 is engaged with a socket portion 11 of a box main body 10. Thus, the door 9 is locked in the locked position with respect to the box main body 10.

When the handle 2 is pulled out from the case 1 around the pivot shaft 3 and rotated, the pusher 4 moves linearly in a direction parallel to the front surface of the case 1 in conjunction with the handle 2, and the outer side surface 5a of the operation protrusion 5 of the pusher 4 pushes the inner side surface 8a of the passive hole 8 of the stopper tongue 6. Therefore, the stopper tongue 6 is rotationally driven in the unlocking direction about the pivot 7, and the tip of the stopper tongue 6 is disengaged from the socket portion. Thereby, the door 9 is unlocked from the box body 10, and the door 9 can be opened by pulling the handle 2 further forward.

Fig. 1 is a perspective view of an exploded state of a flat handle device according to an embodiment of the present invention.

Fig. 2 is a front view of the locked state of the flat handle device.

Fig. 3 is a rear view of the locked state of the flat handle device.

Fig. 4 is a left side view of the locked state of the flat handle device.

Fig. 5 is a right side view of the locked state of the flat handle device.

Fig. 6 is a plan view of the locked state of the flat handle device.

Fig. 7 is a bottom view of the locked state of the flat handle device.

Fig. 8 is a sectional view taken along line a-a of fig. 2.

Fig. 9 is a sectional view corresponding to fig. 8 in a state where the push button is pressed.

Fig. 10 is a sectional view corresponding to fig. 8 in a state where the handle is pulled out and rotated.

Fig. 11 is a rear view of the unlocked state of the flat handle device.

In the illustrated embodiment, the casing 1 is configured by a main body portion 1a fixed to the door 9, a reinforcing base block 1b inserted and fixed to the main body portion 1a, and a back panel 1c inserted and fixed to the back surface side of the reinforcing base block portion 1 b. On the back side of the middle part of the handle 2, the other pivot 12 near the left and right direction is hinged with the base end part of the linkage rod 13, and the other pivot 14 near the left and right direction of the front end part of the linkage rod 13 is hinged with the linkage arm part 15 at the front side of the pushing piece 4. The linkage 13 is arranged to be parallel to the front surface of the housing 1 when the handle 2 is submerged in the housing 1. The pivot shaft 3 at the base end of the handle 2 is inserted through a bearing arm 16 on the front side of the reinforcing base block 1 b.

The interlocking arm 15 of the pusher 4 is inserted into the longitudinal slit 17 of the reinforcing base block 1b so as to be movable up and down, and the main body of the pusher 4 is housed between the reinforcing base block 1b and the back plate 1c so as to be movable up and down. The compression coil spring 20, which is accommodated in the longitudinal opening 18 of the body portion of the pusher 4 and whose upper end is in contact with the rear-side projection 19 of the reinforcing base block 1b, applies downward movement load to the pusher 4. In a state where the handle 2 is housed in the case 1, the pivot 12 at the base end of the interlinking lever 13 exists on the side of the body portion of the pusher 4 with respect to the straight line connecting the pivot 3 at the base end of the handle 2 and the pivot 14 at the tip end of the interlinking lever 13, and therefore the handle 2 is biased in the retracting direction about the pivot 3. In the process of pulling out the grip 2 from the housing 1, at the moment when the pivot 12 crosses the connecting line of the pivot 3 and the pivot 14 to the front side of the housing 1, the direction of the rotational load by the compression coil spring 20 is reversed, and the grip 2 is loaded in the ejecting direction.

The operation projection 5 is provided on the rear surface of the pusher 4 so as to project at right angles thereto, and projects from the escape opening 21 of the rear plate 1c to the rear surface side of the housing 1. The pivot 7 of the retaining tongue 6 is constituted by a small screw screwed into a rear boss portion 22 of the reinforcing base block 1b, the boss portion 22 being inserted into a shaft hole 23 of the retaining tongue 6. The other back boss 44 of the reinforcing base block 1b is inserted into the guide hole 25 partially communicating with the passive hole 8, and the guide screw 24 is screwed into the back boss. A lock unit 26 is fitted and fixed to the front end of the handle 2, and if a predetermined key 28 is inserted into a key hole 30 of the turning part 27 and the turning part 27 is turned, a lock tongue 29 interlocked with the turning part 27 is inserted and withdrawn from a front end hole 31 of the handle 2.

The button 32 is housed in the case 1 so as to face the front end of the handle 2. The fulcrum projection 33 at the base end of the push button 32 is inserted into the circular arc bearing portion 34 of the reinforcing base block 1b, and when the push button 32 is pushed, the fulcrum projection 33 moves while sliding in the circular arc bearing portion 34. The push-button 32 is prevented from being pushed and rotated by the engagement of the latch tongue 29 with the stopper projection 35 at the front end of the push-button 32. A main body part of a lock slider 36 is housed between a reinforcing base block 1b and a back plate 1c so as to be movable up and down, and a drive projection 38 on the back side of the front end part of a push button 32 is brought into contact with a passive projection 37 on the front side of the base end part of the lock slider 36.

When the push button 32 is pushed and rotated, the driving protrusion 38 of the push button 32 pushes the passive protrusion 37 of the locking slider 36 from the lower side, so that the locking slider 36 moves upward in the longitudinal opening 43 of the reinforcing base block 1 b. Since the lock projection 39 at the front end of the lock slider 36 is disengaged from the lock recess 40 at the front end of the handle 2 by the upward movement of the lock slider 36, the handle 2 is released from the housing 1, and the front end of the handle 2 is caught by the fingertips in a state where the knob 32 is pressed and rotated, whereby the handle 2 can be pulled out from the housing 1 and rotated.

The locking slider 36 is pushed down by a torsion coil spring 41 inserted between the housing 1 and the spring receiving stepped surface 42, thereby maintaining the engagement of the locking projection 39 of the locking slider 36 with the locking recess 40 of the handle 2. Further, since the passive projection 37 of the locking slider 36 is in contact with the driving projection 38 of the push button 32, the push button 32 is rotationally biased in the return direction by the torsion coil spring 41.

Further, unlike the above-described embodiment, 3 parts of the housing 1, such as the main body 1a, the reinforcing base block 1b, and the back plate 1c, may be integrally formed, and the linkage mechanism between the handle 2 and the pusher 4 is not limited to the illustrated one, and the linkage mechanism between the push button 32 and the locking slider 36 may be arbitrarily changed.

As described above, in the flat handle device of the present invention, since the pusher 4 which moves linearly in parallel with the front surface of the case 1 in conjunction with the rotation of the handle 2 is provided in the case 1, the operation protrusion 5 is provided on the back surface side of the pusher 4, the operation protrusion 5 of the pusher 4 is inserted into the passive hole 8 of the stopper tongue 6 which is hinge-supported on the back surface of the case 1, and the outer side surface 5a of the operation protrusion 5 is brought into surface contact with the inner side surface 8a of the passive hole 8 of the stopper tongue 6 when the handle 2 is not rotated in the case 1, even if the handle 2 is repeatedly used for a long time, a state in which the stopper tongue 6 cannot be rotated due to the sharp edge of the passive hole 8 being caught by the outer side surface 5a of the operation protrusion 5 is not formed, and the operation protrusion 5 is not broken, and a flat handle device excellent in durability and operational reliability can be obtained.

Claims (1)

1. A flat handle device, wherein a base end portion of a handle 2 rotating in a plane at right angles to a front surface of a case 1 is hinged to the case 1 by a pivot shaft 3 in a left-right direction, a pusher 4 moving linearly in parallel to the front surface of the case 1 in conjunction with the rotation of the handle 2 is provided on the case 1, an operating protrusion 5 is provided on a back surface side of the pusher 4, a stopper tongue 6 rotating in a plane parallel to the front surface of the case 1 is hinged to a back surface portion of the case 1 by a pivot shaft 7 in a front-rear direction, the operating protrusion 5 of the pusher 4 is inserted into a passive hole 8 of the stopper tongue 6, and when the handle 2 is rotated or not rotated in the case 1, an outer side surface 5a of the operating protrusion 5 is brought into surface contact with an inner side surface 8a of the passive hole 8 of the stopper tongue 6, the locking tongue (6) is rotated to a locking position or an unlocking position.