JPS5837411Y2 - Forced locking device in emergency lock winding device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a forced locking device in an emergency locking retractor for a seat belt.

An emergency lock retractor for a seat belt used in a vehicle operates in response to a sudden change in speed of the vehicle, and locks the seat belt drawer.

By the way, when using a child restraint device such as a child seat for restraining a child or a cage for an infant, the child seat or cage for an infant is usually placed on the adult seat and the emergency lock retractor is The vehicle is secured using a seat belt provided with a safety belt.

However, as mentioned above, this emergency lock retractor only operates in emergencies to lock the seatbelt drawer, and does not operate under normal circumstances, making it impossible to completely secure the child restraint system. It included the problem.

Therefore, a forced locking device is required that forces the emergency locking winding device into an operating state at an arbitrary position.

This idea was made in view of the above circumstances, and although it has a simple structure, it is possible to force the emergency lock retractor to operate at any position. It is an object of the present invention to provide a forced locking device on which a child restraint device can be securely fixed.

This invention will be explained in detail below with reference to Examples.

FIG. 1 is an exploded perspective view of an embodiment in which the forced locking device of the present invention is applied to an inertial sensing device (hereinafter referred to as a sensor) of an emergency locking retractor for a seatbelt, and FIG. 2 is a schematic cross-sectional view of the device. It is a diagram.

In the figure, 1 is the sensor case, and this case 1
has a box-like shape with openings at the bottom and the left side in the figure, and through holes 1a, 1a are formed in corresponding positions in the front and rear side walls in the figure, and small holes are formed in the front and rear side walls at positions near the side opening 2. Holes 1b and lb are formed.

Further, a through hole 1C is formed in the side wall opposite to the side opening 2.

Reference numeral 3 denotes a bottom plate having a size that can fit into the bottom surface of the case 1, and is fixed to the bottom surface of the case 1 by adhesive or the like.

The center of this bottom plate 3 has a protrusion 3a that protrudes upward.
A through hole 3b is provided at the top of the protrusion 3a, reaching the bottom surface.

The upper edge 3C of this penetration 7L3b is sloped and has a dish-like shape.
A placement groove may be formed on the top surface of a).

Reference numeral 4 denotes an actuating member having a substantially L-shape in cross section with an obtuse internal angle, and is composed of an actuating part 4a that projects obliquely upward and a passive part 4b that extends horizontally. A claw 5 is formed in the bending part, and a hole 6 penetrating back and forth is formed in the bent part.
A countersunk hole 7 is provided in the passive portion 4b.

The upper edge 7a of this countersunk hole 7 is sloped and has a dish-like shape.

Such an actuating member 4 is rotatably attached to the small hole 1b of the case 1 via a pin 8 inserted into a through hole 6 of the bent portion.

At this time, the actuating part 4a projects upwardly from the opening 2 of the case 1, and the passive part 4b extends parallel to the inside of the case while slightly floating above the bottom plate 3, and has a countersunk hole. 7
are arranged concentrically so as to encompass the protrusion 3a of the bottom plate 3.

9 is a ball used in normal ball bearings (
It is a sphere), and is partially supported within the case 1 on the protrusion 3a of the bottom plate 3, and is stopped so as not to roll from side to side due to its own weight.

In order to assemble this inertial sensing device, when attaching the actuating member 4 to the case 1, insert the ball 9 into the countersunk hole 7 of the passive part 4b.
Insert it with the countersunk hole 7 placed above the protrusion 3 of the bottom plate 3.
If the ball 9 is placed so as to surround the center point a, the ball 9 will rest on the protrusion 3a, as shown in FIG.
Since the passive part 4b is in a horizontal state, the pin 8 can be inserted into the hole 1b of the case 1 and the hole 6 of the bent part to attach it to the case 1.

Therefore, the diameter of the countersink hole 7 of the passive part 4b is determined by the diameter of the ball 9 during assembly.
It is preferable to have a size that allows the ball 9 to be placed thereon and does not come into contact with the ball 9 when the ball 9 is placed on the protrusion 3a of the bottom plate 3.

In addition, when designing the actuating member 4, the actuating member 4 is
When rotatably assembled, the passive part 4b is designed to be parallel (i.e., horizontal) with respect to the bottom plate 3 in a floating state to maintain balance.

At this time, it is preferable that the heights of the upper surface of the passive portion 4b and the upper surface of the protruding portion 3a of the bottom plate 3 are approximately the same.

Furthermore, the size of the case 1 is such that even when the ball 9 described on the protrusion 3a rolls in either the left or right direction,
The size is such that the ball 9 collides with the side wall of the case 1 and stops while contacting both the upper edge of the protruding part 3a and the upper edge of the countersunk hole 7 provided in the passive part 4b. It is preferable that the ball 9 hardly bounce upward.

Note that, when the ball 9 rolls after the actuating member 4 is attached, the small hole 1b provided on the opening side of the case 1 is formed at the upper edge of the countersunk hole 7 and the protrusion 3a as described above. It is preferable to set the distance at such a distance that the ball 9 collides with the protrusion 4C on the inner surface of the bent portion and stops while in contact with the upper edge.

Furthermore, when setting the sensitivity of this inertial sensing device, the angle of the inclined surface 3C of the hole 3b of the protruding part of the bottom plate 3, the distance between the protruding part 3a and the countersink hole 7 of the passive part 4b, and the size of the case 1 are taken into account. This can be easily achieved by appropriately adjusting the weight and size of the ball 9.

A through hole 1C provided in the side wall of the case 1 is capable of reciprocating between a first position away from the ball 9 and a second position where it comes into contact with the ball 9 and displaces the ball 9. The contact member 10 is loosely fitted.

This contact member 10 functions as an operating terminal of the forced locking device of this invention.

This contact member 10 is a tubular flexible guide 1
It is attached to one end 10b' of the push-pull wire 10b inserted into the tube-shaped flexible guide 10a, and one end 10a' of the tubular flexible guide 10a is attached to the fixing metal fitting 12 on the U-shaped frame 11. It is attached through.

These flexible guides 10a and push-pull wires 10b constitute a connecting member.

On the other hand, the other end 10b'' of the push-pull wire 10b is
It is connected to the lower end of an operating member 13 as shown in FIG. 3a, which constitutes the forced locking device of this invention.

This operating member 13 is swingably supported at the intermediate portion by a mounting bracket 14 via a pin 14a, and in this state, the emergency lock winding device (particularly where the operating terminal is installed) in the vehicle interior is connected. It is located far away from the

The upper part of the mounting bracket 14 is provided with an arcuate guide part 14b and a stopper groove 14C. When in use, the stopper 13a of the operating member 13 is engaged with the stopper groove 14C to hold the abutting member 10 at the second position.

Further, the other end 10a'' of a tube-shaped flexible guide 10a is fixed to the mounting bracket 14 via a fixing bracket 12a, and the manual operation member 13 guides the stopper 13a to the mounting bracket 14. When the part 14b is separated from the stopper groove 14C, the spunong 14d
The spring 14d urges the abutting member 10 to the first position where it does not normally come into contact with the ball 9.

FIG. 3 is a schematic explanatory diagram showing another embodiment of the operating member.

This means that the operating member 13' with the other end of the push-pull wire 10b attached to the mounting bracket 14' is connected to the spring 14d'.
The operating member 13' is arranged through the spring 14d'
When pressed against the push-pull wire 10b, the contact member 10 attached to one end of the push-pull wire 10b is positioned at the second position and comes into contact with the ball 9, causing the stopper 13a' located above to be pressed against the ball 9. By pressing against the spring 13f and engaging with the stepped portion 13e of the operating member 13', the abutting member 10 is held in the second position.

Then, when the stopper 13a' is pushed against the spring 13f and removed from the step 13e of the operating member 13', the operating member 13' is urged outward by the urging force of the spring 14d'. protrudes from the mounting bracket 14 and releases the regulation of the ball 9.

In each of the above embodiments, one end of the tube-shaped flexible guide 10a is attached to the frame 11 via the fixing fitting 12, but the invention is not limited to this, and the flexible guide 10a is attached to the case 1. Even if one end portion 10a' of a is directly attached, the same effect as described above can be obtained.

The sensor configured in this manner is placed, for example, in the vicinity of an emergency lock take-up device that has a ratchet wheel 11A on a belt take-up reel, and normally the pawl 5 at the tip of the actuating member 4 meshes with the teeth of the ratchet wheel. Keep it in a position where it will not be exposed, and at a slight distance away.

Then, when a sudden change in acceleration occurs (for example, when an acceleration of 0.3 G or more is applied) due to a collision accident or acceleration/deceleration of a vehicle, this sensor senses and causes the ball 9 to roll. If designed in advance, such a ball 9 would roll.

Due to this transfer of the ball 9, the passive part 4b of the actuating member 4 is pushed from above, losing its equilibrium state and causing the tip end to move downward.

Therefore, the actuating member 4 rotates, and its actuating portion 4a moves obliquely upward.

As a result, the tip claw portion 5 of the actuating portion 4a engages the ratchet wheel 11.
It meshes with the teeth of A, preventing rotation in the belt pulling direction,
The belt drawer is locked, ensuring the safety of the occupants.

Note that the rolled ball 9 touches the upper edge of the protrusion 3a of the bottom plate 3,
Since the ball 9 collides with the side wall of the case 1 while being in contact with both the upper edge of the countersunk hole 7 of the passive part 4b, when the tilt of the vehicle or the acceleration state returns to normal, the ball 9 will not move. The actuating member 4 is again positioned on the protruding portion 3a of the bottom plate 3, and accordingly, the actuating member 4 also returns to its original equilibrium state, so that there is no hindrance to the belt pulling out and winding operations.

On the other hand, when attaching a child restraint device to an adult seat that has a seat belt equipped with such an emergency lock retractor, after placing the child restraint device on the seat,
Wrap the adult seat belt and fit the tongue into the buckle.

Then, in order to keep the emergency locking device in operation in this state, the forced locking device according to this invention may be operated.

That is, when using the operating member shown in FIG. 3a, the occupant manually moves the operating member 13 counterclockwise to engage the stopper 13a with the collar groove 14C of the mounting bracket 14. .

In addition, when using the operating member 13' as shown in FIG. do it.

As a result, the contact member 10 serving as an operating terminal provided at the end of the bush pull wire 10b attached to the lower part of the operating member 13 protrudes to the second position in the case 1 and causes the ball 9 to roll. , the pawl 5 of the operating member 4 is connected to the ratchet wheel 11.
The belt drawer is always locked by meshing with the teeth A, and the child restraint device is securely fixed by the seat belt.

If the vehicle suddenly stops or tilts, for example, when a force of about 0.3 to 0.7 G is applied, a sensor (not shown) installed in the child restraint system will lock the child belt drawer. becomes.

Furthermore, the stopper 13a of the operating member 13 is attached to the mounting bracket 1.
4, the operating member 13 is removed from the stopper groove 14C.
is returned to its original position by the urging force of the spring 14d.

As a result, the abutting member 10 of the bush pull wire end of the operating member 13 is located in the first position within the case 1,
The restraint of the ball 9 is released, the ball returns to its original position, and the pawl 5 of the actuating member 4 is disengaged from the teeth of the ratchet wheel.

FIGS. 4 and 5 show an example in which an inertial sensing device having a locking device configured as described above is applied to an emergency locking retractor previously proposed by the applicant of the present application.

Reference numeral 11 denotes a frame having U-shaped side plates, the bottom of which is attached to the interior of the vehicle, and 15 a shaft suspended between the side plates.

A winding force is applied to the shaft 15 by a spiral spring (not shown) fixed to the outside of the side plate of the frame 11.

A ratchet wheel 16 is fixed to a belt take-up reel (not shown) which is coaxially fixed to the shaft 15.

Reference numeral 17 denotes a safety belt whose one end is fitted onto this reel and wound around by the action of the spiral spring.

Reference numeral 18 denotes a pawl suspended between both side plates of the frame 11, and is designed to mesh with and disengage from the teeth of the ratchet wheel 16, and one end of the pawl 18 has a tip facing diagonally upward. The end portion of the connecting plate 19 extending from the top to the right is attached.

Further, pawl springs 20 are provided at appropriate locations on the pawl 18, and the pawl 18 is normally pressed in a direction away from the ratchet wheel 16.

The stepped portion of the shaft 15 protruding from the frame 11 has a long hole 21a that engages with the protrusion 19a of the connecting plate 19.
An internally toothed foil 21 is rotatably mounted, whereby rotation of the internally toothed foil 21 is converted into swinging motion of the pawl 18.

Further, a cam foil 22 is fixed to the shaft 15 inside the teeth of an internally toothed foil 21 by an appropriate method.

Furthermore, an inertia wheel 23 is pivotally attached to a bushing, which will be described later.
A pawl 24 and a pawl spring 25 are attached to the cam wheel 22 by a stepped pin or the like.
a, is capable of meshing with the internally toothed foil 21, and is normally separated from the internally toothed foil 21 by a pawl spring 25.

A stepped bushing 26 is rotatably attached to the shaft 15 and is stopped by a stop ring 27 provided at the end.

An inertia foil 23, a flower spring (not shown), and an externally toothed foil 28 are assembled in this order and are pivoted to the stepped portion of the bushing 26.

The hole spring allows the inertia foil 22 and the external toothed foil 28 to
and can slide against the bushing 26 with appropriate frictional force.

Reference numeral 29 denotes a sensor attached substantially below the externally toothed foil 28, and is composed of the bottom plate 3, the operating member 4, the ball 9, etc. as main parts.

This sensor 29 is mounted so that the bottom plate 3 is maintained in a substantially horizontal state, and the claw portion 5 at the tip of the actuating member 4 is normally separated from the teeth of the externally toothed foil 28, but is located at a position where they mesh during operation. will be placed in

A contact member 10, which is an operating terminal of the forced locking device according to the present invention having the above-described structure, is attached to this sensor.

Next, the operation of such a device will be explained with reference to FIG.

When used for adults, the operating member 13 is not operated, and the abutting member 10 is located at a position where movement of the ball 9 is not hindered.

In such conditions, if the vehicle suddenly stops or tilts,
For example, when an acceleration of about 0.3G to 0.7G is applied, the ball 9 of the sensor 29 rolls, the actuating member 4 is pushed, and its tip moves upward, causing the pawl 5 to engage the externally toothed foil. It will mesh with 28 teeth.

At this time, acceleration is applied to the passenger and the belt 17 is about to be pulled out, causing the shaft 15 and the cam foil 22 fixed to the shaft to push the pawl 24 outward, and the pawl 24 meshes with the internally toothed wheel 21, causing the connecting plate 19 to be pulled out. Then, the pawl 18 operates and the pawl 18 meshes with the teeth of the ratchet wheel 16, thereby locking the belt 17 from being pulled out.

On the other hand, when the child restraint seat or the infant cage is attached to the seat of a vehicle such as a car using an adult seat belt, the operating member 13 is moved counterclockwise. The stopper 13a is engaged with the stopper groove 14C of the mounting fitting 14.

As a result, the push-pull wire 10 b attached to the lower part of the operating member 13 is pushed out and protrudes into the second position within the push-pull wire, causing the ball 9 to roll and the pawl 5 of the operating member 4 to be pushed through the outer toothed foil. It will mesh with 28 teeth.

Then, as described above, the pawl 18 meshes with the teeth of the ratchet wheel 16, so that the belt 17 is always locked from being drawn out, and is securely fixed.

FIG. 6 is a schematic explanatory diagram showing an embodiment in which the forced locking device of this invention is applied to another sensor.

This is attached to the upper opening of the case 30, and the weight 31a is attached to the lower part of the case 30.
A swing member 31 is disposed, and the engagement recess 31 b of the swing member 31 has a claw 32 a at one end, and the engagement protrusion 32 of the actuating member 32 is pivotally supported on the case 30 at the other end. b
This is different from the embodiment described above in that the two are engaged, and the other parts are the same as those of the embodiment described above, so a description thereof will be omitted.

The structure configured in this way has the abutting member 1 when in use.
0 is brought into contact with the weight 31 a, and the claw 32 of the actuating member 32 is
A is engaged with the teeth of a ratchet wheel to lock the belt drawer, and its operation and effect are almost the same as those of the previous embodiment, so a detailed explanation will be omitted.

FIG. 7 is a schematic explanatory diagram showing an embodiment in which the forced locking device of this invention is applied to another sensor.

In this case, a truncated conical tilting member 34 is disposed inside a case 33 that is open at the top, and an engagement recess 34 a above the tilting member 34 has a claw 35 a at one end, and the other end is attached to the case 33 . The difference from the above embodiments is that the engagement protrusion 35b of the pivoted operating member 35 is engaged, and the other parts are almost the same as the above embodiments. Further explanation will be omitted.

It should be noted that each of the above embodiments is merely an example, and it goes without saying that each member can be replaced with another member having the same function.

In particular, the specific configurations of the operating terminal, the operating member, and the connecting member are not limited to those of the embodiments described above.

Since this device is constructed as described above, it can be used in the same way as a normal seat belt without any hindrance when using an adult seat belt, and it can also be remotely controlled when securing a child restraint system. Accordingly, the emergency lock winding device can be always held in a locked state at any position and securely fixed, and a forced locking device with extremely high utility value can be provided.

Furthermore, it has excellent effects such as being able to supply a highly reliable product at a low cost with an extremely simple structure.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the forced locking device of this invention applied to a sensor, Fig. 2 is a schematic sectional view thereof, and Fig. 3 a, l) shows the operation of the forced locking device. FIGS. 4 and 5 are front views of an embodiment of an emergency lock retractor equipped with a forced locking device of this invention, and schematic front views for explaining the operation. 7 are schematic front views showing an embodiment of another sensor to which the forced locking device of this invention is applied. 1...Case, 3...Bottom plate, 4...
...Operating member, 5...Claw, 6...Hole, 7...Countersunk hole, 9...Ball, 10.
...Abutting member, 10a...Push-pull wire, 11...Frame, 12...
・Fixing bracket, 13... Operating member, 14...
...Mounting bracket, 15...Shaft, 16...
... Ratchet car, 17 ... Safety belt, 1
8...Paul, 21...Inner teeth foil,
23...Inertia foil, 26...Bushing, 28...External toothed foil, 31...
Swinging member, 34...Tilt member.

Claims (3)

[Scope of utility model registration request] (1) An emergency locking retractor for a seatbelt, which is installed in a vehicle interior and includes an inertial sensing device having a displacement member that responds to sudden changes in vehicle speed, and locks a belt reel by displacement of the displacement member. , the distal end is movable between a first position away from the displacement member and a second position in which it comes into contact with the displacement member to displace the displacement member, and is normally held at the first position. and an operating member disposed at a position away from the operating terminal via a connecting member connected to the operating terminal, and the operating terminal is moved to the second position by operating the operating member. A forced locking device in an emergency lock winding device, characterized in that a belt reel is locked by causing the belt reel to lock. (2) the connecting member is inserted into a tubular flexible guide and is removably inserted into the flexible guide;
A forced lock in an emergency lock winding device according to claim 1 of the utility model registration claim, characterized in that the push-pull wire has one end fixed to the operating terminal and the other end fixed to the operating member. Locking device. (3) The operating member is provided with a stopper that maintains the operating state when the operating terminal is operated to the second position where the displacement member is displaced. Claim 1 of the Utility Model Registration Claim Or a forced locking device in the emergency locking retractor described in paragraph 2.