KR20180128337A - Variable air bag module - Google Patents

Abstract

The present invention relates to a variable airbag module which comprises: an airbag having a front panel and a rear panel, and expanding by an inflow of gas; a plurality of tethers installed to be vertically spaced, and having both sides individually connected to the front panel and the rear panel; a communication connection unit provided in any one of a lower portion of the airbag or the tethers; and a control means varying an expanding shape of the lower portion of the airbag by selectively releasing connection with the communication connection unit based on a drive or a dummy condition when the airbag expands. Therefore, in accordance with the driver or the dummy condition, when the airbag expands, an expansion phenomenon of the lower portion of the airbag coming in contact with the chest or an abdominal region can be varied.

Description

[0001] VARIABLE AIR BAG MODULE [0002]

The present invention relates to a variable-type airbag module, and more particularly, to a variable-size airbag module that deploys between a steering wheel and a driver to protect the driver in the event of a sudden deceleration of the vehicle due to a collision.

Automobiles are the most popular means of transportation for modern travel. The car is a convenient device that allows the driver to move and stop when he / she operates the gear and steps on the pedal, but it is also a product of a lot of engineering knowledge for this convenience.

As such, although the car gives convenience, it is moving at a high speed, so that a person who is aboard the car in case of an accident can be seriously injured, resulting in death. Therefore, in automobiles, an airbag, which is a device for securing the safety of the person on board, is regarded as the most important device.

The airbag is filled with high-pressure gas to protect the passenger's impact in the event of a collision. The airbag must meet the evaluation standards of each country as strictly applied to life-directing devices.

The evaluation test of the airbag is carried out by a method of evaluating the impact applied to the dummy by raising a dummy (experimental human body model) equipped with sensors at each site under specific conditions and generating a collision. In this way, the performance of the airbag is evaluated through the impact applied to the dummy. The dummy is continuously studied, developed and improved so as to be similar to the human body. In recent years, the movement of the arm is similar to the human body. An improved Thor pile was developed to measure many points.

The US introduced a new pile of Thor into the NCAP (New Car Assessment Program). However, the introduction of the new type of pile as above causes problems.

In the United States, it is necessary to satisfy the criteria of the NCAP (New Car Assessment Program) and to meet the FMVSS (Federal Motor Vehicle Safety Standards) that the existing dummy (Hybrid-Ⅲ) to be.

Japanese Utility Model Publication No. 61-11084 U.S. Patent No. 6,626,459 Korean Patent Publication No. 10-2008-0050778

The Thor dummy is the same size as a conventional male adult dummy (a hybrid 50 ^th % -ile Male dummy), but as it is made biomechanically closer to a human, the fixed shoulder flexibly moves, The number of measurement parts of the 125 has also increased.

As described above, the new Thor pile is sensitive to the impact applied to the chest or abdomen, so that it is difficult to meet the criteria because the degree of impact applied to the chest or abdomen differs from that of the conventional dummy (Hybrid-Ⅲ) Respectively.

Particularly, since the driver's seat airbag according to the prior art can not change the expansion volume according to the condition of the driver or the driver, the pressure applied to the chest of the driver at the time of collision can not be appropriately adjusted.

SUMMARY OF THE INVENTION An object of the present invention is to provide a variable-type airbag module capable of preventing an excessive inflation pressure from being applied to a chest or abdomen of a driver or a dummy during a collision of an automobile.

Another object of the present invention is to provide a variable-type airbag module capable of varying an expansion volume according to conditions of a driver or a dummy to securely protect the same.

In order to achieve the above object, a variable-type airbag module according to the present invention includes a front panel and a rear panel, and includes an airbag that is inflated by the inflow of gas, A communication connection portion provided at any one of the lower portion of the airbag or the plurality of tethers, and a communication connection portion selectively released based on a driver or dummy condition at the time of inflation of the airbag, And an adjusting means for varying an inflating shape of a lower portion of the housing.

And the communication connection portion is provided at a central portion of the tether located below the center of the airbag among the plurality of tethers or at a position close to the housing in which the airbag is housed.

The rear panel is formed with a gas supply hole through which gas is supplied from the inflator through a housing in which the airbag is housed, and the communication connection portion is provided below the rear panel.

The communication connection part may be formed at a lower portion of the rear panel, or may be formed by connecting a separate extension tether.

Wherein the adjusting means comprises an adjusting tether whose one side is connected through the communication connecting portion,

And a cutting body connected to the other side of the adjusting tether and cutting the adjusting tether based on an operation signal of the air bag control unit.

The housing is provided with a fixing hole in which the adjusting tether is fixed and an indentation preventing groove for preventing the housing from being caught between the housing and the rear panel when the airbag is inflated.

One end of the adjusting tether is connected to the housing or the airbag through the communication connecting portion, and the other end of the adjusting tether is installed in the cutting body.

The adjustment tether is provided in a loop shape having both ends connected to each other, and the housing is formed with a hook portion through a rear surface of the housing so that a part of the adjustment tether can be installed.

As described above, according to the variable-type airbag module according to the present invention, the effect that the inflated shape of the lower portion of the airbag can be varied when the airbag inflates according to the driver or dummy condition is obtained.

That is, according to the present invention, there is provided a communication connecting portion through which a control tether penetrates and connected to a rear panel of a second tether or an airbag installed in the airbag, and a control tether is selectively cut according to a driver or a dummy condition, The effect of being able to restrict or completely expand the inflated shape is obtained.

Thus, according to the present invention, when the inflated shape of the lower portion of the airbag is restricted by using the adjusting tether, the impact applied to the chest or abdomen of the dummy due to not touching the chest or the abdomen of the driver or the dummy is reduced, The effect of being able to abut the chest or abdomen of the dummy can be obtained by fully inflating the airbag when not connected to the second tether.

As a result, according to the present invention, it is possible to obtain an effect that both the NCAP standard and the FMVSS standard can be satisfied.

1 is a view showing the operation principle of a variable airbag module according to a first embodiment of the present invention,
Fig. 2 is a rear view of the variable airbag module shown in Fig. 1,
3 is an exploded view of a front panel and a rear panel,
4 is a view illustrating a manufacturing process of the communication connection portion,
Figure 5 is an enlarged view of the communication connection of the second tether and the adjustment means,
6 is a perspective view of a variable airbag module according to a second embodiment of the present invention,
7 is a perspective view of a variable airbag module according to a third embodiment of the present invention,
8 is an operational state diagram of an actuator applied to the variable airbag module according to the fourth embodiment of the present invention,
9 is a developed view of a front panel and a rear panel of a variable airbag module according to a fifth embodiment of the present invention,
FIG. 10 is a view illustrating a housing applied to a variable airbag module according to a fifth embodiment of the present invention; FIG.
Fig. 11 is an operational state view of the cutting body shown in Fig. 10; Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a variable airbag module according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, terms indicating directions such as 'left', 'right', 'forward', 'rearward', 'upward' and 'downward' are defined as indicating respective directions based on the states shown in the respective drawings do.

The present embodiment will be described using a driver's seat airbag module.

Of course, it should be noted that the present invention can be modified to apply to the passenger seat airbag module as well as the driver seat airbag module.

[First Embodiment]

1 is a view showing the operation principle of a variable airbag module according to a first embodiment of the present invention.

FIG. 1 (a) shows a state before the adjusting means is in operation, FIG. 1 (b) shows a state in which the adjusting means is operated, and FIG. 1 (c) Are compared with each other.

The variable airbag module according to the first embodiment of the present invention is configured such that the airbag 100 is inflated through the relationship between the second tether 300 and the adjustment means 400 connected to obstruct the deployment of the second tether 300 The volume can be adjusted.

1 (a), when the adjusting means 400 and the second tether 300 are connected, the second tether 300 can not be fully opened when the airbag 100 is inflated, The lower side of the airbag 100 (the lower side of the front panel 110 can be deployed concavely by a length that the second tether 300 is controlled by the adjustment means 400).

Conversely, if the adjusting means 400 is not connected to the second tether 300, as shown in FIG. 1 (b), the second tether 300 can be moved by the adjusting means 400 to any restraint It unfolds completely as it does not get hit. Thus, the airbag 100 can be fully inflated.

In the present invention, the variable airbag module is constructed on the basis of the above-described contents.

Fig. 2 is a rear view of the variable airbag module shown in Fig. 1, and Fig. 3 is a developed view of a front panel and a rear panel.

Fig. 3 (a) is an exploded view of the rear panel, and Fig. 3 (b) is a developed view of the front panel.

The variable airbag module in this embodiment includes the airbag 100, the first tether 200, the second tether 300, the adjustment means 400, and the housing 600, as shown in Figs. 2 and 3 do.

The airbag 100 includes a front panel 110 and a rear panel 120 and the front panel 110 and the rear panel 120 may be interconnected by a sewing method or the like. Therefore, the airbag 100 can be divided into the outside and the inside.

A gas supply hole 320 is formed in the rear panel 120 of the airbag 100 and the airbag 100 expands when the gas is introduced into the airbag 100 through the gas supply hole 320.

Both sides of the first tether 200 are connected to the front panel 110 and the rear panel 120, respectively. That is, the first tether 200 connects the front and rear surfaces of the interior of the airbag 100.

The second tether 300 is connected to both the front panel 110 and the rear panel 120 at a position spaced downward from the first tether 200 by a predetermined distance in the same manner as the first tether 200 .

The first tether 200 defines the inflated deploying shape of the upper portion of the airbag 100 and the second tether 300 functions to define the inflated deploying shape of the lower portion of the airbag 100.

The control means 400 is connected to the second tether 300 and the other side is operated by an airbag control unit (AC0U) 500 and an adjusting tether 410 which is fixed And may include a cutting body 420.

The cutting body 420 is operated according to the operation signal of the ACU 500 to cut the adjustment tether 410.

So that the adjustment tether 410 operates to prevent the second tether 300 from being deployed when gas is supplied to the airbag 100 and the airbag 100 is inflated.

On the other hand, when the cutting body 420 is operated by the operation signal of the ACU 500, as the cutting tether 410 is cut, the adjusting tether 410 is released from the fixed portion, .

On the other hand, the ACU 500 can output an operation signal based on whether or not the seat belt is worn when the airbag 100 is operated.

For example, when the seat belt is worn, the ACU 500 does not output an operation signal even if the air bag 100 is operated.

However, when the seat belt is not worn, the ACU 500 outputs an operation signal to the cutting body 420 to control the cutting body 420 to operate. Of course, this case is an exemplary case, and it should be understood that it is not so limited.

An airbag 100 is installed on the front surface of the housing 600 and the rear surface of the housing 600 is fixed to the steering wheel of the vehicle.

At the center of the housing 600, a placement hole 620 may be formed to be connected to the inflator. A gas supply hole 320 is disposed in the placement hole 620 when the airbag 100 is installed on the front surface of the housing 600 and a placement hole 620 is formed in the gas supply hole 320 To the airbag 100. [

In the meantime, the other side of the adjusting tether 410 is fixed to the housing 600 to be fixed.

The connection relationship of each configuration of the variable airbag module having the above configuration will be described in more detail as follows.

The housing 600 may be formed in a shape that is symmetrical with respect to the center.

A fixing hole 610 is formed in the housing 600. The fixing hole 610 may be a hole through which the adjusting tether 410 is moved and can not be moved after receiving the pressing force. However, it should be apparent that the present invention is not limited to these embodiments.

In addition, a through hole 121 is formed in a position symmetrical to the rear panel 120. The through hole 121 allows the adjustment tether 410 moved through the fixing hole 610 of the housing 600 to be moved into the rear panel 120 and connected to the second tether 300.

The second tether 300 includes a communication connection 310. The second tether 300 can be connected to the adjusting tether 410 in such a manner that the adjusting tether 410 moves through the communication connecting portion 310. [

That is, the adjusting tether 410 passes through the fixing hole 610 formed in the housing 600, passes through the through hole 121 of the rear panel 120, moves into the airbag 100, The second tether 300 may be connected to the second tether 300 by moving through the first tether 310. Then, the adjusting tether 410 passes through the through hole 121 formed on the other side, moves to the outside of the airbag 100, and finally passes through the fixing hole 610.

However, in this case, the adjustment tether 410 is connected by an example. The most important concept in the present invention is that the second tether 300 is fixed to the adjusting tether 410 before and after cutting by the cutting body 420, At least one side of the adjusting tether 410 is fixed to the fixing hole 610 provided with the cutting body 420 and the portion located inside the panel is connected to the communication connection portion 310, And the other side may be formed to be fixed.

4 is a diagram illustrating a manufacturing process of the communication connection portion.

The communication connection portion 310 may be formed by connecting a separate communication tether to the second tether 300 or by folding or forming the second tether 300.

4 (a), the communication connection part 310 may be formed by connecting a communication tether formed in a shape set to the lower side of the second tether 300, for example, a cylindrical shape with one side and the other side being hollow .

4 (b), the communicating connection portion 310 may be formed in the second portion a2 of the second tether 300 at a position spaced apart from the first portion a1 and the first portion a1, The first portion a1 and the second portion a2 may be connected to each other.

Here, the communication connection portion 310 may be a portion that is naturally formed when the first portion a1 and the second portion a2 are folded so as to contact with each other so that the adjustment tether 410 can communicate.

The communication connection portion 310 may be connected to the control tether 410 so as to prevent the second tether 300 from being unfolded before being cut by the cutting body 420, 2 tether < RTI ID = 0.0 > 300 < / RTI >

The communication connection portion 310 may be provided at a central portion of the second tether 300 or may be provided at various positions such as a position close to an end portion of the second tether 300,

A cutting member 420 may be installed on at least one of the fixing holes 610 formed at symmetrical positions of the housing 600. [

That is, when two fixing holes 610 are formed in the housing 600, they may be installed in any one of the fixing holes 610, or may be provided on both sides.

Here, the fixing hole 610 may be one according to the embodiment. Details will be described later.

According to this connection relationship, before the cutter body 420 is operated, the adjustment tether 410 interferes with the expansion of the second tether 300, so that the lower portion of the airbag 100 can not be inflated when the airbag 100 is inflated , So that the airbag 100 can be fully opened after the operation.

5 is an enlarged view of the communication connection portion of the second tether and the adjustment means.

5 (a) and 5 (b) show a state in which the communication connecting portion of the second tether and the adjusting means are connected in different ways.

The gas supplied to the interior of the airbag 100 is a high pressure gas and the adjusting tether 410 is cut off in a state where the cutting body 420 is not operated by the high pressure gas There is a possibility of quality. There is therefore a need to protect the adjustment tether 410.

The variable airbag module of the present invention recognizes the necessity as described above so that the second tether 300 is disposed at least below the gas supply hole 320 and the communication connection portion 310 is disposed below the second tether 300 . Therefore, the present invention can minimize the influence due to the gas introduced into the gas supply hole 320.

In addition, the length of the communication connection part 310 may be a length not shorter than the length of the second tether 300.

The second tether 300 has a first length L1 and a second length L2. The first length L1 is a length of the second tether 300 arranged to connect between the front panel 110 and the rear panel 120. The length may vary greatly. The second length L2 is a length having a direction orthogonal to the first length L1.

That is, the communication connection portion 310 may be formed to have a length not shorter than the second length L2 of the second tether 300.

For example, the communication connection 310 may have a second length L2 as shown in FIG. 5 (a), or may have an adjustment tether 410, as shown in FIG. 5 (b) The second tether 300 is formed to have a length longer than the second length L2 of the second tether 300 and is formed in a tube shape so as to surround the adjustment tether 410. Thus, .

On the other hand, when the airbag 100 is fully inflated, the adjusting tether 410 can be fitted between the housing 600 and the airbag 100. In this case, when the cutting body 420 is operated and the adjustment tether 410 is cut, the fitted adjustment tether 410 still restrains the second tether 300. Therefore, even if the cutting body 420 is operated, the airbag 100 may not be fully opened.

In order to solve such a problem, the variable airbag module of the present invention may form an interference prevention groove 630 in which the adjustment tether 410 is disposed in the housing 600, as shown in FIG.

The jamming preventing grooves 630 may be formed symmetrically with respect to the center of the housing 600 on both sides.

That is, when the adjusting tether 410 moving through the fixing hole 610 of the housing 600 moves to the through hole 121 of the rear panel 120, . The adjustment tether 410 is not caught between the airbag 100 and the housing 600 because of the extra space disposed in the interference prevention groove 630. [

[Second Embodiment]

6 is a perspective view of a variable airbag module according to a second embodiment of the present invention.

In the second embodiment of the present invention, as shown in FIG. 6, the adjusting tether 410 moves through the inside and outside of the rear panel 120 and moves to the inside of the rear panel 120, The adjusting tether 410 located outside of the rear panel 120 is connected to the cutting body 420. The adjusting terminal 410 is connected to the cutter body 420. The cutter body 420 is fixed to the rear panel 120,

Here, it is preferable that one end of the adjustment tether 410 is installed near the gas supply hole 320, and if not, it is preferable that at least the second adjustment tether is not connected to the second tether 300. The reason for this is that when the one end of the adjusting tether 410 is connected to the second tether 300 and the second tether 300 is inflated when the airbag 100 is inflated, I can do it.

Accordingly, it is preferable that one end of the adjustment tether 410 is installed on the rear panel 120. [

It should be understood that the adjustment tether 410 located outside the rear panel 120 must be cut by the cutting body 420 as described above and thus must be connected to the cutting body 420.

[Third Embodiment]

7 is a perspective view of a variable airbag module according to a third embodiment of the present invention.

In the third embodiment of the present invention, as shown in FIG. 7, the adjusting tether 410 passes through the inside and outside of the rear panel 120, passes through the inside of the rear panel 120, And the second tether 300 are connected to each other.

The second tether 300 is connected to the housing 600 and does not block the gas supply hole 320 and prevents the second tether 300 from being damaged by the gas supplied by the inflator. And a reinforcing portion (not shown) is provided. In this embodiment, the adjustment tether 400 is connected to this portion.

Thus, when the adjusting tether 400 is cut by the cutting body 420 in a state where the adjusting tether 400 is connected so as to prevent the second tether 300 from being unfolded, Do not interfere.

[Fourth Embodiment]

The present invention can be modified to apply an actuator 700 that changes the adjusting tether 410 in place of the cutting body 420. [

8 is an operational state diagram of an actuator applied to a variable airbag module according to a fourth embodiment of the present invention.

Fig. 8 (a) shows the state before the actuator is operated in the variable airbag module, and Fig. 8 (b) shows the state after the actuator is operated.

The actuator 700 is connected to the adjusting tether 410 at one side thereof and may be rotated in one direction or the other direction so that the length of the adjusting tether 410 may be made longer or shorter. Thus, the degree of inflation of the lower side of the airbag 100 when inflated can be controlled.

For example, in order to control the inflation of the lower portion of the airbag 100, the actuator 700 rotates in one direction to keep the length of the adjustment tether 410 short. Accordingly, when the airbag 100 is inflated, the lower front of the airbag 100 can be concaved.

On the contrary, when the airbag 100 is to be fully inflated, the actuator 700 rotates in the other direction to keep the length of the adjustment tether 410 long. Accordingly, the airbag 100 can be inflated to its maximum volume when inflated.

[Fifth Embodiment]

9 is a developed view of a front panel and a rear panel of a variable airbag module according to a fifth embodiment of the present invention.

FIG. 9A is an exploded view of the rear panel, FIG. 9B is an exploded view of the front panel, and FIG. 9C is an enlarged cross-sectional view of the lower end of the airbag.

9 (a) to 9 (c), the variable airbag module according to the fifth embodiment of the present invention has a communication connection 310 in the rear panel 120 instead of the second tether 300 do.

That is, at the lower end of the rear panel 120, a communication connection part 310 for connecting the adjustment tether 410 may be extended downward.

Here, the communication connection part 310 may be formed by extending the lower end of the rear panel 300 downward, or by connecting a separate extension tether by a sewing method or the like, and connecting the extension tether to the adjustment tether 410 Or the like, so as to provide a communicating space through which the exhaust gas passes.

As described above, according to the present invention, instead of the first or second tether which defines the inflated shape of the airbag, a communication connection portion is provided on the rear panel to connect the adjustment tether and the cutting body is operated according to the driver or dummy condition, The expansion shape can be varied.

FIG. 10 is a view showing a housing applied to a variable airbag module according to a fifth embodiment of the present invention, and FIG. 11 is an operational state view of the cutting body shown in FIG.

Fig. 10 (a) is a plan view of the housing, and Fig. 10 (b) shows a state in which the adjustment tether is connected to the housing and the communication extension.

Fig. 11 (a) shows a state before operation of the cutting body, and Fig. 11 (b) shows a state after operation of the cutting body.

10A and 10B, the housing 600 may be formed in a substantially hexahedral shape in which a space is formed therein and a front surface connected to the rear panel 120 of the airbag 100 is opened. have.

A cutting member 420 may be provided at one side of the inner space of the housing 600 and a hook 640 may be provided at one side of the cutting member 420 to hook the adjusting tether 410.

Here, the adjusting tether 410 is provided in a loop shape having both ends connected to each other, and may be installed through the communication connecting portion 310 and the upper portion of the cutting body 420.

Therefore, the hook portion 640 may be formed through the rear surface of the housing 600 in a '⊂' shape when viewed from the front, so that the hook portion 640 can be easily installed by hanging a part of the loop-shaped adjustment tether 410.

As shown in FIGS. 11A and 11B, the cutting body 420 includes a main body 430 having an outer shape and a through hole through which the adjusting tether 410 is connected at one side, a main body 430 An actuator 440 which is built in the main body 430 and driven according to an operation signal of the ACU 500 and an adjusting tether 410 which is linearly moved in accordance with driving of the actuator 440 and connected through a through hole 430 formed in the main body 430 (Not shown).

As described above, according to the present invention, the loop-shaped adjusting tether connected to the communication connection portion can be easily installed on the housing by providing the hook portion on one side of the housing, and the cutting body can be operated according to the driver or dummy condition, can do.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

That is, in the above embodiments, the communication connection portion is provided in the second tether among the first and second tether. However, the present invention is not limited to this. In the present invention, one or more tether is provided inside the airbag, It can be changed to connect the communication connection to one tether.

The present invention may be modified not only to provide a rear panel but also to provide a communication connection portion on the front panel and to selectively change the connection shape of the communication connection portion and the adjustment tether according to the driver or dummy condition to vary the inflated shape of the lower portion of the airbag.

The present invention is applied to a variable-type airbag module technology for varying the inflating shape of the lower portion of the airbag according to driver or dummy conditions.

100: air bag 110: front panel
120: rear panel 121: through hole
200: first tether 300: second tether
310: communication connection part 320: gas supply hole
400: control means 410: control tether
420: cutting body 430:
440: Actuator 450: Cutter
460: Through hole 500: ACU
600: Housing 610: Fixing hole
620: placement hole 630:
640: hook portion 700: actuator
L1: first length L2: second length
a1: first part a2: second part

Claims (8)

An airbag including a front panel and a rear panel and expanding by inflow of gas,
A plurality of tethers spaced apart from each other in the vertical direction and connected to the front panel and the rear panel,
A communication connection portion provided on any one of the lower portion of the airbag or the plurality of tethers,
And adjusting means for selectively releasing the connection with the communication connection portion on the basis of a driver or dummy condition when the airbag is inflated to vary the inflating shape of the lower portion of the airbag. The method according to claim 1,
Wherein the communication connection portion is provided at a central portion of a tether located below a center of the airbag among the plurality of tethers or at a position close to a housing in which the airbag is housed. The method according to claim 1,
A gas supply hole through which gas is supplied from an inflator through a housing in which the air bag is installed is formed on the rear panel,
Wherein the communication connection portion is provided at a lower portion of the rear panel. The method of claim 3,
Wherein the communication connection portion is formed by extending a lower portion of the rear panel or connecting a separate extension tether. 5. The method according to any one of claims 1 to 4,
Wherein the adjusting means comprises an adjusting tether whose one side is connected through the communication connecting portion,
And a cutting body connected to the other side of the adjusting tether and cutting the adjusting tether based on the operation signal of the air bag control unit. 6. The method of claim 5,
The housing includes a fixing hole to which the adjusting tether is fixed,
Wherein an interference preventing groove is formed between the housing and the rear panel when the airbag is inflated to prevent the airbag from being caught between the housing and the rear panel. The method according to claim 6,
One end of the adjustment tether is connected to the housing or the airbag through the communication connection,
And the other end of the adjusting tether is installed on the cutting body. 6. The method of claim 5,
Wherein the adjusting tether is provided in one loop shape with both ends connected to each other,
Wherein the housing is formed with a hook portion through a rear surface of the housing so that the adjusting tether can be partially installed.

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