JPH10297279A - Open lock mechanism of door handle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open lock mechanism of a door handle which can prevent the turn of the door handle in door opening direction when large impact force (acceleration) is applied and can reduce weight of the door handle. SOLUTION: A handle arm 14b is protruingly provided from a back face of a door pull knob 14a for operation of a door handle 14, and the door handle 14 is rotatably held in a handle case 12 by a shaft 13 which passes through a hole formed in the handle arm 14b. A weight member 20 which can move by external force is provided in the handle case 12, and a plate spring 23 is positioned and fixed on a rotation locus of the handle arm 14b by the weight member 20 when external force is applied to prevent the rotation of the handle arm 14b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a vehicle, a home appliance,
The present invention relates to an improvement in an opening lock mechanism for a door handle of furniture or the like, and particularly to an improvement in an opening lock mechanism for a door handle for preventing an erroneous opening when an impact force is applied from the outside.

[0002]

2. Description of the Related Art Conventionally, for example, a door of a vehicle is provided with an engaging member (locking mechanism) that engages with the vehicle body and the door side in order to maintain the closed state of the door.
The engagement state of the engagement member with the engaged member is released by rotating a plate-shaped handle provided on the door.

FIGS. 10A and 10B show a door handle unit 1 mounted on a door of a vehicle described above. 1, a door handle unit 1 includes a handle case 2 fixed to a vehicle door body (not shown).
And a door handle 4 rotatably held by the handle case 2 via the shaft 3.

The handle case 2 has an opening 2b in which an operating pull knob 4a of the door handle 4 is located by bulging a wall portion 2a to the back side. A slit 2 is formed in the wall 2a so that a pair of handle arms 4b protruding from both ends of the operation knob 4a can be inserted.
c is formed. Further, a plurality of flanges 2d protrude from the back surface of the wall 2a. Door handle 4
The hole 2 formed in the flange 2d and the handle arm 4b with the handle arm 4b inserted into the slit 2c.
The door handle 4 is rotatably held by the handle case 2 by making the shafts 3 pass through the holes 2e and 4c so that the shafts e and 4c are aligned coaxially. Further, the wall 2a
Is mounted with a cushion rubber 5 which comes into contact with the back surface of the operation pull knob 4a.

The shaft 3 has a handle arm 4 at one end.
b, and the other end thereof is in contact with the back surface of the wall portion 2a, so that the spring 6 that always urges the door handle 4 to the non-operation position is mounted. A hole 4d for mounting a counterweight 7 is formed on one of the handle arms 4b of the door handle 4, and a snap 8 for restricting the rotation range of the door handle 4 in the operation direction is mounted on the other of the handle arm 4b. A hole 4e is formed.

The counterweight 7 is provided to prevent the door from being erroneously opened when an impact force (acceleration) in an accident or the like is applied to the door. The principle of the prevention mechanism for preventing erroneous opening is that, for example, W1 is the lower mass of the door handle 4, W2 is the upper mass of the door handle 4, W3 is the mass of the counterweight 7, G
Is the impact acceleration, L1 shown in FIG. 10 (B) is the distance from the center of the shaft 3 to the lower center of gravity of the door handle 4, L2 is the distance from the center of the shaft 3 to the upper center of gravity of the door handle 4, L3 Is the distance from the center of the shaft 3 to the center of gravity of the counterweight 7. In this case, the moment of the door handle 4 around the center of rotation when receiving the impact force (see arrows M1 and M2) is the moment M1 in the opening direction of the handle M1 = W1 × L1 × G The moment M2 in the closing direction of the handle M = ( W2 × L2 + W
3 × L3) × G, and if these two moments M1 and M2 are balanced, the door handle 4 will not rotate in the door opening direction even if an acceleration G due to any impact is applied.

[0007]

By the way, in the door handle release lock mechanism configured as described above,
Due to the configuration of the door handle, W1 × L1 >> W2 × L2, so that W3 × L3 must be close to W1 × L1, but it is difficult to increase L3 due to the space inside the door and the like. Also, it cannot be increased in W3 considering that it is set in the space of the door handle 4. Therefore, M1> M2,
Even if the initial moment R by the spring 6 is applied, there can be an impact acceleration G that satisfies M1> M2 + R. In order to prevent the door handle 4 from turning to the door open state when such an impact acceleration G is applied, it is necessary to balance the moment around the shaft 3 as described above.

However, there is a problem in that if the counterweight 7 is mounted so that the moment is balanced, the counterweight 7 becomes too large to fit in a predetermined space. In consideration of this problem, if the shape of the counterweight 7 is manufactured in an irregular shape in consideration of the installation space, the manufacturing cost increases (the specific gravity is smaller and the volume is further increased as compared with iron when zinc die-casting is used). When the size of the counterweight 7 is not sufficient, it can be dealt with by increasing the mounting torque of the spring 6 for returning the door handle 4. A new problem arises in that the load increases and the operation feeling deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and does not impair the operation feeling of a door handle, but does not impair the turning of the door handle in the door opening direction when a large impact force (acceleration) is applied. Can be blocked, and
It is an object of the present invention to provide a door handle opening lock mechanism that can realize a light weight of a door handle.

[0010]

In order to achieve the above object, the present invention provides a door handle having a handle arm protruding from the back of an operating pull knob, and rotating the door handle. A housing frame that can be held, a movable body that is held by the housing frame and that can be moved by an external force, and is positioned and fixed on a rotation locus of the handle arm by movement of the movable body to prevent rotation of the handle arm. And a lock member.

Here, the door handle is mounted on, for example, home electric appliances, furniture, automobiles, and the like. The external force to be applied is, for example, in the case of home electric appliances and furniture, added due to an earthquake or other causes. Vibration and drop impacts,
In the case of a car, it is an impact force generated by a collision or the like.

According to this structure, the movable body which is moved by the external force positions and locks the lock member on the rotation trajectory of the handle arm to prevent the rotation of the door handle. Therefore, the open lock mechanism is constituted by a compact structure. be able to.

In order to achieve the above object, in the structure of the present invention, the moving body is a weight which can be moved to a locked position by inertia when an external force is applied.

In order to achieve the above object, in the structure of the present invention, the lock member is a swinging piece that can swing between a locked position and a non-locked position of the handle arm. And

According to this configuration, the weight moves sensitively upon detecting the application of an external force of a predetermined amount or more, and the swinging piece that swings between the locked position and the unlocked position is positioned and fixed at the locked position. Therefore, the locking operation can be realized with a simple configuration, and the weight is moved by using the inertia force of the weight having the predetermined weight, so that a malfunction in which the locking mechanism operates due to a slight external force can be eliminated. .

In order to achieve the above object, in the structure of the present invention, the moving body is a pin which can be moved to a locked position by inertia when an external force is applied.

In order to achieve the above object, in the configuration of the present invention, the lock member is a claw member formed on a handle arm and engageable when the pin moves to a lock position. Features.

According to this configuration, the pin sensitively detects the application of an external force of a predetermined amount or more and moves to the lock position, and engages with the claw member formed on the handle arm, so that the lock operation is simple. Since the pin can be moved by utilizing the inertial force of a pin having a predetermined weight, it is possible to eliminate a malfunction in which the lock mechanism operates due to a slight external force.

In order to achieve the above object, in the configuration of the present invention, the lock member has a return means for returning the lock member to the unlocked position when the external force is released. Features.

Here, the return means is, for example, a forced return mechanism using an elastic member such as a spring or a return mechanism using the inclination and the weight of the member.

According to this structure, the lock member returns to the unlocked position at the same time as the external force is released, and the handle arm is allowed to rotate. Therefore, the application of the impact force is completed and the door needs to be opened. In this case, the opening operation can be performed smoothly.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a door handle release lock mechanism according to the present invention will be described with reference to the drawings as applied to a vehicle door.

Embodiment 1 1 to 3 show a door handle release lock mechanism according to a first embodiment of the present invention.

In FIG. 1A, a door handle unit 11 includes a handle case (housing frame) 12 fixed to a vehicle door body (not shown) and a handle case 1.
2 is provided with a door handle 14 rotatably held via a shaft 13. The wall portion 12a of the handle case 12 is swelled to the rear side, so that the opening 1 in which the pull knob 14a for operation of the door handle 14 is located.
2b is formed. The wall 12a is provided with a slit 12c into which a handle arm 14b protruding from both rear surfaces of the operation pull knob 14a is inserted. Further, a plurality of flanges 12 are provided on the back surface of the wall portion 12a.
d is projected. Accordingly, the door handle 14 coaxially aligns the hole 12e (only one is shown) formed in the flange 12d and the handle arm 14b with the handle arm 14b inserted into the slit 12c, and Is rotatably held by the handle case 12 as a housing frame. Further, a cushion rubber 15 which is in contact with the back surface of the operation pull knob 14a is mounted on the wall 12a.

At an upper portion of the handle case 12, a lock mechanism 16 for controlling an opening operation of the operation pull knob 14a is provided. The lock mechanism 16 has a case 18 attached to the handle case 12 with a screw 17 as shown in FIG. The case 18 has a partition wall 18c provided between the walls 18a and 18b on both sides. The wall 18a has a through hole 18d, and the partition wall 18c has a through hole 18e.
A flange 18g having a hole 18f for inserting the screw 17 is extended from the wall 18b.
It has a screw fixing seat 18h and a projection 18i.

The case 18 has a shaft 19 penetrating through the through holes 18d and 18e so as to straddle the one wall 18a and the partition wall 18c, a weight member 20 as a moving body which is loosely fitted to the shaft 19, and The weight member 2
A coil spring 21 for urging the zero to the partition wall 18c;
A swinging piece (a leaf spring in the present embodiment) 23 as a lock member fixed by a screw 22 screwed to the screw fixing seat 18h while being positioned by the projection 18i.
And

The leaf spring 23 has a substantially L-shape including a fixed portion 23a and an arm portion 23b, and a curl portion 23c is formed at the tip of the arm portion 23b.
The weight member 20 is configured to move in a compression direction against the urging force of the coil spring 21 due to its inertia when an impact force is applied to a vehicle or the like due to a collision or the like. The initial mounting load of the coil spring 21 is set to be about twice the mass of the weight member 20, and when the impact force is removed, the weight member 20 is biased by the coil spring 21 to move the weight member 20 to the initial position ( (A position where the weight member 20 and the partition wall 18c are in contact with each other).

One end of the shaft 13 has a handle arm 14 similar to the door handle unit described in the prior art.
b, and a spring (not shown) is mounted for urging the door handle 14 to be in the non-operation position in a normal state by contacting the other end with the back surface of the wall portion 12a.

Next, the operation of the first embodiment will be described with reference to FIG. In a normal state (when there is no operation of the door handle and no external force is applied), as shown in FIG. 2A, the leaf spring 23 secures a gap from the weight member 20 and the handle arm 14b, and the curl portion 23c Is in a free state.

When the vehicle door body is to be opened, the door shown in FIG.
As shown in FIG. 2B, pull the operation pull knob 14a (see FIG. 1) forward (in the case of FIG. 2B, move to the left).
As a result, the door handle 14 rotates about the shaft 13, and the handle arm 14 b pushes the curl portion 23 c to displace the curl portion 23 c from the lock position to the unlock position, and at the same time, the curl portion 2
3c enters. At this time, since the weight member 20 is pressed against the partition wall 18 c by the coil spring 21, the leaf spring 23 does not come into contact with the weight member 20 and the case 1
8 Go inside. Also, if you release the door handle 14,
The handle arm 14b returns to the initial position. At the same time, the leaf spring 23 returns to the initial position. In a normal door opening operation, the above-described state is repeated, and the weight member 20 is kept at a fixed position.

On the other hand, when an impact force acts on the vehicle door body or the like, as shown in FIG. 2C, the weight member 20 moves against the bias of the coil spring 21 by the impact force. FIG. 2C shows an initial state of impact application.
This shows a state where the door handle 14 has just started to rotate. That is, the door handle 14 also receives the impact force and attempts to rotate about the shaft 13 in the opening direction. However, at an initial stage, the handle arm 14b does not come into contact with the curl portion 23c and the leaf spring 23 It is held in the initial position.

When the time further elapses, FIG.
As shown in (D), the handle arm 14b comes into contact with the curled portion 23c and tries to deflect the leaf spring 23, but the weight member 20 moves by the impact force and the coil spring 2
1 is in a further compressed position. Therefore, the curl portion 23c comes into contact with the weight member 20 to prevent the curl portion 23c from being displaced. As a result, the rotation of the handle arm 14b, that is, the rotation of the door handle 14 in the opening direction is prevented. When the impact force is released, the weight member 20 is returned by the bias of the coil spring 21 (moves rightward in FIG. 2D), and the door opening allowable state shown in FIG. Become.

The leaf spring 23 is attached in the following manner.
Instead of the screw 22, a rivet or the like may be used, or it may be press-fitted into a gap or the like utilizing the characteristics of spring steel. Further, as shown in FIG. 3, the holding of the weight member 20 may be performed by the shaft 19 disposed at an angle. In this case, the weight member 20 can return its position in the right direction in the figure by its own weight, so that the coil spring 21 can be eliminated by tilting the shaft 19.
In FIG. 3, the same components as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Further, the case 18 may be made substantially closed,
If a guide member for guiding the weight member 20 is provided on the inner wall portion, the shaft can be eliminated, and the same effect as in the above-described example can be obtained.

Embodiment 2 4 and 5 show a door handle release lock mechanism according to a second embodiment of the present invention. 4A to 4D, a door handle unit 31 includes a handle case 32 fixed to a vehicle door body (not shown) and a door rotatably held by the handle case 32 via a shaft 33. And a handle 34.

The wall portion 32a of the handle case 32 is bulged to the rear side, thereby forming an opening 32b in which the operating pull knob 34a of the door handle 34 is located. An operation pull knob 34a is provided on the wall 32a.
Is formed with a slit 32c into which a handle arm 34b protruding from the rear surface of both ends of the handle is inserted. Further, a plurality of flanges 32d are protruded from the back surface of the wall 32a. Therefore, the door handle 34 is
b with flange 32d inserted in slit 32c.
Holes 32e and 34 formed in the handle arm 34b and the handle arm 34b.
c is coaxially matched, and the shaft 33 is penetrated through the hole 32e so as to be rotatably held by the handle case 32 as a housing frame. Further, a cushion rubber 35 which is in contact with the back surface of the operation pull knob 34a is mounted on the wall 32a.

In FIG. 4 (B), a pair of flanges 32d located on the left side face upward (FIG. 2).
In the case of (A), a long hole 32f is formed which is inclined obliquely upward to the right. And a pair of long holes 32f
A pin 36 as a moving body is slidably provided between them. On the other hand, at the upper end of the handle arm 34b located between the pair of flanges 32d, a claw member 34d that can be engaged with the pin 36 is formed as a lock member. A spring 37 is attached to the shaft 33 so that one end abuts the handle arm 32b and the other end abuts the rear surface of the wall 32a, thereby urging the door handle 34 to be always in the non-operation position. ing.

Next, the operation of the second embodiment will be described.
Normally, as shown in FIG. 4A to FIG.
6 is located at the lower end of the long hole 32f by its own weight. When the vehicle door body is opened, as shown in FIG. 5 (A), the operation pull knob 34a is pulled forward (to the left in FIG. 5 (A)) so that the door 33 is centered on the shaft 33. The handle 34 rotates without contacting the pin 36. In a normal door opening operation, the above-described state is repeated.

On the other hand, when an impact force acts on the vehicle door body or the like, the impact force displaces the pin 36 to the upper end of the elongated hole 32f, as shown in FIG. In this case, the door handle 34 also receives the impact force and attempts to rotate about the shaft 33 in the opening direction.
Of the handle arm 3
4b, that is, the door handle 34 in the opening direction is prevented.

When the impact force is released, the external force applied to the door handle 34 by the bias of the spring 37 is released, and the engagement between the pin 36 and the claw member 34d is released. 36 is a long hole 32f by its own weight
Returns to the lower end. As a result, the door opening permitted states shown in FIGS.

As shown in FIG. 6, the elongated hole 32f is made horizontal, and the pin 36 is always urged toward the unlock position (the position shown in FIG. 6) in the elongated hole 32f.
It is also possible to prevent the door from being opened by providing the door, and it is possible to prevent the door from being unexpectedly prevented from being opened when, for example, the vehicle stops diagonally left and right. Note that FIG.
In this embodiment, the same components as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Embodiment 3 7 to 9 show a door handle release lock mechanism according to a third embodiment of the present invention. In FIG. 7A, the door handle unit 41
Includes a handle case 42 fixed to a vehicle door body (not shown), and a door handle 44 rotatably held by the handle case 42 via a shaft 43.

The wall portion 42a of the handle case 42 is bulged to the rear side, thereby forming an opening 42b in which the operating pull knob 44a of the door handle 44 is located. An operation pull knob 44a is provided on the wall 42a.
Are formed with slits 42c into which handle arms 44b protruding from the rear surfaces of both ends are inserted. Further, a plurality of flanges 42d are protruded from the back surface of the wall 42a. Therefore, the door handle 44 is
b with the flange 42d inserted in the slit 42c.
A hole 42e (only one is shown) formed on the handle arm 44b and the handle arm 44b are coaxially aligned with each other, and the shaft 43 is penetrated through the hole 42e, so that the hole 42e is rotatably held by the handle case 42 as a fixed portion. Further, a cushion rubber 45 that is in contact with the back surface of the operation pull knob 44a is mounted on the wall 42a.

A lock mechanism 46 for controlling the opening operation of the operating pull knob 44a is provided at the upper part of the handle case 42. As shown in FIG. 7B, the lock mechanism 46 has a case 48 attached to the handle case 42 with a screw 47, and a cover 49 attached to the case 48. The case 48 has a substantially convex shape in a plan view, and the through holes 4a are formed in both longitudinal walls 48a and 48b.
8c is formed, and a through hole 48e is formed in the fore-edge wall 48d.
Are formed. A flange 48g having a hole 48f for inserting the screw 47 extends below the one wall 48a in the longitudinal direction.
A plurality of claws 48h engaging with the cover 49
Are formed.

As shown in FIGS. 7A and 7B, a shaft 50 penetrating through the through hole 48c is provided in the case 48.
A weight member 51 as a moving body and a coil spring 52 which are loosely fitted to the shaft 50 are arranged, and a rocking piece 53 as a lock member having a projection 53a penetrated through the through hole 48e, and mounted on the projection 53a. Spring 54, a disk 56 rotatably held via a pin 55 between a pair of holding claws 53b provided on the swinging piece 53, and a rib 57 provided between the weight member 51 and the wall 48a. And

The initial mounting load of the spring 52 is set to be about twice the mass of the weight member 51. When the impact force (acceleration) is removed, the weight of the weight member 51 is initialized by the force of the spring 52. It is restored to the position (the position where the weight member 51 contacts the rib 57). The oscillating piece 53 has a cut surface 53c formed thereon. The cut surface 53c abuts on the cover 49 to prevent the oscillating piece 53 from rotating.
Is maintained parallel to the axis. As a result, the operation of the weight member 51 along the shaft 50 is smoothly transmitted to the rocking piece 53 orthogonal to the shaft 50.

As shown in FIG. 8A, the spring 54 is arranged so as to constantly urge the disk 56 of the rocking piece 53 toward the conical portion 51a of the weight member 51 (inclination angle of about 30 °). I have. Similarly to the door handle unit 31 shown in the second embodiment, one end of the shaft 43 is in contact with the handle arm 44b, and the other end is in contact with the rear surface of the wall 42a, so that the door handle 44 is always in contact. A spring (not shown) that urges it to be in the non-operation position is penetrated.

Next, the operation of the third embodiment will be described with reference to FIGS. Normally, as shown in FIGS. 8A and 8B, the coil spring 52 is at the open allowable position where the weight member 51 is in contact with the rib 57. When the vehicle door body is opened, as shown in FIG. 8 (B), the operating handle 44a is pulled forward (downward in FIG. 8 (B)) so that the door handle is centered on the shaft 43. 4
4 rotates. In a normal door opening operation, the above state is repeated, and the weight member 51 is kept at a fixed position.

On the other hand, when an impact force acts on the vehicle door body or the like, the weight member 51 moves against the bias of the coil spring 52 by the impact force as shown in FIG. At this time, the disk 56 is rotated by the conical portion 51 a of the weight member 51, and the projection 53 a is further projected outward from the case 48 against the bias of the spring 54. The door handle 44 also tries to rotate about the shaft 43 in the opening direction due to the impact force. And
When the time further elapses, as shown in FIG. 9B, the protrusion 44c formed on the handle arm 44b
a, and the rotation of the handle arm 44b, that is, the rotation of the door handle 44 in the opening direction is prevented.

When the impact force is released, the weight member 51 is returned by the urging force of the coil spring 52 and, at the same time, the rocking piece 53 is urged by the urging force of the spring 54.
Returns to the door open permission state shown in FIG.

As described above, in the door handle release lock mechanism of the present invention, the weight member 2 as a moving body is provided.
When the pins 0, 51, the pins 36, and the like are displaced by an external force, the rocking pieces 23, 53 as the lock members, and the claw members 34
The rotation of the door handles 14, 34, 44 is prevented by the engagement of d and the like with the door handles 14, 34, 44. Accordingly, it is possible to prevent the door handles 14, 34, 44 from turning in the door opening direction when a large impact force (acceleration) is applied without impairing the operation feeling of the door handles 14, 34, 44. In addition, since it is not necessary to provide the counterweight 7 or the like shown in the related art on the door handles 14, 34, 44, the weight of the door handles 14, 34, 44 can be reduced, and the operation feeling can be further improved. Can be.

Further, by providing the springs 21, 38, 52, when the impact force is removed, it is possible to reliably restore the door to the open state by the urging force. Only the lock mechanism can be operated.

In each of the above embodiments, an example in which the present invention is applied to a vehicle door is disclosed. However, the present invention can also be applied to, for example, doors and drawers of home electric appliances and furniture, etc. Can be prevented from being opened.

[0054]

As described above, in the door handle release lock mechanism according to the present invention, the moving body which is moved by the external force positions and locks the lock member on the rotation trajectory of the handle arm to rotate the door handle. Therefore, the opening lock mechanism can be configured with a compact configuration. Further, during a normal operation in which no external force is applied, the lock member and the like are retracted from the operation range of the door handle, so that the operation feeling of the door handle is not impaired, and further, the weight of the door handle can be reduced.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of a first embodiment of a door handle opening lock mechanism of the present invention.

FIG. 2 is an explanatory diagram illustrating the operation of the first embodiment of the door handle opening lock mechanism of the present invention.

FIG. 3 is an explanatory diagram illustrating a modification of the first embodiment of the door handle release lock mechanism of the present invention.

FIG. 4 is a structural explanatory view of a door handle release lock mechanism according to a second embodiment of the present invention.

FIG. 5 is an operation explanatory view of a door handle release lock mechanism according to a second embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating a modification of the second embodiment related to the door handle release lock mechanism of the present invention.

FIG. 7 is a structural explanatory view of a door handle release lock mechanism according to a third embodiment of the present invention.

FIG. 8 is an explanatory diagram of an operation when an external force is not applied in the door handle opening lock mechanism according to the third embodiment of the present invention.

FIG. 9 is an explanatory diagram of an operation when an external force is applied in the door handle opening lock mechanism according to the third embodiment of the present invention.

FIG. 10 is an explanatory view illustrating a conventional door handle release lock mechanism.

[Explanation of symbols]

11 door handle unit, 12 handle case,
13 shaft, 14 door handle, 14a pull knob for operation, 14b handle arm, 20 weight members (moving body, swinging piece), 23 leaf spring, 23c curl portion.

Claims (6)

[Claims] A door handle having a handle arm protruding from a back surface of an operating pull knob; a housing frame rotatably holding the door handle; and a housing frame held by the housing frame and movable by an external force. An opening lock mechanism for a door handle, comprising: a movable body; and a lock member positioned and fixed on a rotation locus of the handle arm by movement of the movable body to prevent rotation of the handle arm. 2. An opening lock mechanism for a door handle according to claim 1, wherein said movable body is a weight which can be moved to a locked position by inertia when an external force is applied. 3. The door handle according to claim 2, wherein the lock member is a swinging piece that can swing between a locked position and a non-locked position of the handle arm. Open lock mechanism. 4. An open lock mechanism for a door handle according to claim 1, wherein said movable body is a pin which can be moved to a lock position by inertia when an external force is applied. 5. The door handle according to claim 4, wherein the lock member is a claw member formed on a handle arm and engageable when the pin moves to a lock position. Open lock mechanism. 6. The release lock mechanism according to claim 1, wherein said lock member has a return means for returning said lock member to an unlocked position when an external force is released. An open lock mechanism for the door handle.