JPH0442208Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] The present invention is an attachment/detachment fitting for automobile seatbelts, more specifically, a fitting for attaching and detaching a seatbelt for a car, and more specifically, a fitting for attaching and detaching a seatbelt for a car, and more specifically, a fitting for attaching and detaching a seatbelt for a car so that a seatbelt wearer can immediately escape from the vehicle in the event of an emergency such as a collision. The present invention relates to an attachment/detachment fitting that allows the seatbelt to be quickly released.

[Conventional technology and its problems]

Seat belts in automobiles are an extremely effective means of protecting the lives of drivers and passengers from traffic accidents, and recently it has become compulsory for front seats to wear seat belts.

However, since seatbelts restrain people in their seats, although they can be a life-saving measure against the impact of an accident, they become a factor that hinders escape from the vehicle. In particular, car fires are common in collisions and fall accidents.
In such cases, a momentary delay in releasing the seatbelt can be fatal. Conventional seatbelts are designed so that the attachment/detachment fitting can be released with a single touch, but in a panic situation immediately after an accident,
Alternatively, it is quite possible that the metal fittings cannot be released quickly in an injured state, and this possibility is even higher for elderly people and children.

The present invention has been developed in view of the above-mentioned conventional problems, and it is an object of the present invention to provide an attachment/detachment fitting that can quickly release the seatbelt immediately after an emergency such as a traffic accident.

[Means for solving problems]

The detachable fitting of the present invention, like conventional fittings, consists of a main body fitting each attached to a belt, and a connecting fitting detachably connected to the main body fitting.

The connecting fitting has an engaged portion in its main body fitting insertion portion, with which a member on the main body fitting side is to be engaged.

The main body fitting has a casing having an insertion port for the connecting fitting, and an engaging portion to be engaged with the engaged portion of the connecting fitting, and can be pushed down into the casing using the end on the insertion port side as a fulcrum. a metal fitting locking member provided, a connection release member slidably or tiltably attached to the casing to push down the metal fitting locking member by manual operation; A lever body is biased to push down the locking member and is attached to the casing via the other end, and one end of the lever body is removably engaged with the lever body to resist the biasing action. The lever holder has a hook for holding the lever and is attached to the casing so as to be tiltable when pressed, and the lever holder is configured so that its length in the linear direction is extended by deformation due to heating, and the lever is held by the extension. In order to press the body so as to release the engagement of the hooking claw from the lever body, a metal pressing member is attached at one end to the casing side and the other end is engaged to the lever holding body, and the metal pressing member is attached to the pressing member. It consists of an electric heating element.

[Effect]

In a normal state, the lever holder holds the lever body by its hooking claw, and the lever body does not apply a downward force (a downward force that would remove the connecting metal fitting) to the metal fitting locking member.

Also, when wearing a seat belt, the main body fitting insertion part of the connecting fitting is inserted into the main body fitting, and the engaging part (engaging protrusion) of the metal fitting locking member is inserted into the engaged part (through hole, etc.) of the insertion part. etc.) are engaged to lock the connecting fitting to the main body fitting.

In an emergency, when the switch is turned on manually or automatically and the electric heating element is energized, the pressing member is heated.
The pressing member that is heated for a certain period of time deforms and stretches in a straight line, and the lever holder that holds the lever body,
It is pushed by this extended pressing member and tilts, and the hooking pawl is removed from the lever body. When the biased lever body is released from the state held by the lever holder, it tilts downward and pushes down the metal fitting locking member, whereby the connecting metal fittings are released from the locked state by the metal fitting locking member. It is now ready to be pulled out from the main body metal fittings. Usually, the insertion portion of the connecting fitting is biased by a biasing means (such as a spring) inside the main fitting, so that the insertion portion is automatically removed from the main fitting due to the action of the urging means (such as a spring).

〔Example〕

1 to 7 show an embodiment of the present invention.

The detachable fitting of the present invention consists of a main body fitting 1 and a connecting fitting 2 that is detachably connected to the main body fitting, and is similar to conventional fittings in this respect. The main body fitting 1 is fixed to a mounting portion on the vehicle body side, while a belt a is attached to the connecting fitting 2.

The connecting fitting 2 has a plate-shaped insertion part 3 to be inserted into the main body fitting, and a rectangular transparent part that is an engaged part with which a member on the main body fitting side is to be engaged is inserted into this insertion part 3. A hole 4 is formed.

The main body fitting 1 includes a casing 5, a fitting locking member 6 for locking the insertion portion 3 of the connecting fitting within the casing, and a locking state of the insertion portion by the fitting locking member by manual operation. Uncoupling member 7
, a lever body 8 biased to push down the metal fitting locking member, a lever holder 9 for holding the lever body against the biasing action, and a lever body 9 that is expanded by deformation due to heating. It consists of a pressing member 10 that presses the lever holder, and an electric heating element 11 attached to this pressing member.

The casing 5 has an insertion port 13 formed at one end thereof into which the connecting fitting insertion portion 3 is inserted, and guides one side of the inserted insertion portion 3 on both inner sides of the insertion port 13. A guide portion 14 is provided.

The metal fitting locking member 6 has an engaging protrusion 15 to be engaged with the through hole 4 on the connecting metal fitting side, and a spring is applied so that the engaging protrusion 15 faces the connecting metal fitting insertion part in the casing. 16 in an inclined manner, and is configured to be able to be pushed down against the elastic force of the spring 16 using the end on the insertion port 13 side as a fulcrum.

Further, the metal fitting locking member 6 of this embodiment has an inclined guide surface 17 on which a portion on the connection release member side described below contacts and slides to push it down.
is formed.

The connection release member 7 is disposed within the casing 5 so as to be slidable in the connection fitting insertion direction while being guided on both sides thereof, and its finger-holding protrusion 18 projects from the opening 19 of the casing 5 . A slide portion 20 that slides in contact with the inclined guide surface 17 of the metal fitting locking member 6 is provided at the end of the connection release member 7 facing the metal fitting locking member 6 . This slide portion 20 is configured as an inclined surface facing the inclined guide surface 17.

A spring 21 (coil spring) is interposed between the decoupling member 7 and the base inside the casing, and biases the decoupling member 7 toward the insertion port.

The lever body 8 has one end connected to the metal fitting locking member 6.
It can be engaged with the upper surface of the distal end thereof, and is fixed inside the casing 5 via the other end side. This lever body 8 is biased so as to engage with the tip of the metal engagement member and push it downward, and in this embodiment, it itself is composed of a leaf spring, and uses its elastic force to use the casing mounting side as a fulcrum. It tilts to push down the metal engagement member 6. A notch 23 is formed in the center of the tip side of the lever body 8, and a hooking claw of a lever holder described below is engaged with the inner edge of the notch 23.

The lever holder 9 has the lever body 8 at one end.
It has a hook 22 to be removably engaged with the casing 5, and has a window hole 25 in the middle part for engaging the pressing member, and is tiltably fixed to the inside of the casing 5 via the other end side. There is. This lever holder 9 is also made of a leaf spring material, and a predetermined pressing force causes the metal fitting locking member 6 to be moved around its fixed part as a fulcrum.
It is configured to tilt in the direction. As shown in FIG. 2 and FIG.
3, and holds the lever body 8 in a state in which the metal fitting locking member is not pushed down against the biasing action (at least in a state to the extent that the connecting metal fitting does not come off). By tilting in the direction of the locking member, the hooking pawl is disengaged from the lever body 8. Note that in this state of holding, the lever body 8 and the lever holder 9 are in a substantially right-angled relationship.

In this embodiment, the lever body 8 and the lever holder 9 are constructed by bending a single sheet of leaf spring material. Then, these members and the pressing member 10
is fixed to an insulating base 24 inside the casing.

The pressing member 10 expands in length in the linear direction by being deformed by heating, and in this embodiment is made of a bimetallic plate. This bimetal plate is composed of a combination of metal plates that are curved in the longitudinal direction and deform into a flat plate shape when heated. For this reason, the member has a curved shape with the metal plate having a large coefficient of thermal expansion placed on the inside.

The pressing member 10 is located in a space surrounded by the lever body 8 and the lever holder 9, and one end thereof is fixed to the casing 5 and the other end is connected to the lever holder 9 through the window hole 25. engaged.

The electric heating body 11 is made of a heating wire, is wound around the pressing member 10, and is configured to heat the pressing member by applying electricity.

Electricity is supplied to this electric heating element 11 from a battery through a conductor 26, but it is preferable that the electricity to the electric heating element 11 be cut off after the lever body 8 is released from the holding state. The structure is as follows. That is, the electric heating element 11 is configured such that its negative side is electrically connected to the lever body 8.
In this embodiment, since the lever body 8 and the lever holder 9 are integrally formed by a plate spring member, the negative conductor 26' of the electric heating element 11 is connected to this plate spring member. In addition, the energizing contact 12 is
It is attached to the inside of the casing, and its tip is configured to come into contact with the upper surface of the lever body 8 held by the lever holder 9. This energizing contact is connected to a battery (vehicle body ground) via a conductive wire.

In some cases, a contact point may be provided on the lever body 8 via an insulating member, and the conducting wire 26' may be connected to this contact point, and the energizing contactor 12 may be brought into contact with the contact point so as to be able to come into contact with and separate from it.

FIGS. 10 to 12 each show other embodiments of the present invention.

In FIG. 10, the manual release means for the connecting fittings is not a sliding type as in the previous embodiment, but a pressing type.

The uncoupling member 7' is located inside the casing 5, and
One end side contacts the upper tip of the metal fitting locking member 6, and the other end side can be tilted as a fulcrum. This connection release member 7' is a flat pressing part 2 for pressing operation.
7 is exposed to the outside through a window hole 28 formed in the casing 5.

In such an embodiment, when removing the metal fittings by manual operation, when the pressing part 27 is pressed with a finger and the connection release member 7' is tilted downward, the metal fitting locking member 6 is pushed down, and the locked state of the connection metal fittings is released. be done.

Figures 11 and 12 show the lever body,
This shows a modification of the lever holding body. In FIG. 11, the lever body 8' is made of a rigid body, and is tiltably supported by a spring 29 (plate spring) fixed to the casing. The stop member 6 is biased to be pushed down.

Further, in FIG. 12, the lever holder 9' is made of a rigid body, and the lever holder 9' is tiltably supported by a spring 30.

In addition to the embodiments described above, other suitable configurations may be adopted, such as making both the lever body and the lever holder a rigid body supported by a spring.

Further, the springs 29 and 30 may be coil springs.

Note that even when the lever body and the lever holding body are constructed from separate members as in these embodiments, the conductor from the electric heating body 11 is connected to the lever body 9, 9' or to the contact point formed on the lever body. Connected.

Further, the configuration of the pressing member 10 is not limited as long as it can be expanded by heating. FIG. 8 shows a modification of the bimetal, in which bent recesses 33 are provided at intervals in one of the two metal members 31 and 32 (plate material or wire material) having different coefficients of thermal expansion. 31 is spot-welded to member 32 through its bent recess 33 to assemble both members, and the entire structure is curved so that member 32 having a large coefficient of thermal expansion is placed on the inside. The electric heating body 11 (electric heating) is wound around the member 32.

Further, the pressing member 10 may be made of, for example, a shape memory alloy other than bimetal. FIG. 9 shows an example of this, in which the pressing member is composed of a curved plate or wire made of a shape memory alloy, and the electric heating body 11 is wound around this.

Note that the electric heating body 11 and the battery are, for example,
It can be configured to be energized by a switch that operates based on impact detection by the impact sensor, so that when an impact such as an accident occurs, the switch is automatically turned on and becomes energized. Further, instead of such an automatic switch, or together with this automatic switch, a manual switch that can be operated by a driver or the like may be provided.

Next, the operation of the above-mentioned attachment/detachment fitting will be explained using the embodiment shown in FIGS. 1 to 7 as an example.

2 and 3 show the state in which the belt is attached, and the engagement protrusion 15 of the metal fitting locking member 6 engages with the through hole 4 of the main body metal fitting insertion part of the connecting metal fitting 2, and the connecting metal fitting 2 is secured to the main body fitting 1.

When the belt attachment is to be released by normal operation, the connection release member 7 is slid. As a result, the inclined guide surface 17 comes into contact with the slide portion 20 and pushes down the metal fitting locking member 6, the engagement protrusion 15 comes out of the through hole 4, and the connecting metal fitting 2 becomes in a state where it can be removed.

Next, automatic cancellation in an emergency will be explained. When an accident or the like occurs, when the switch that should energize the electric heating element 11 is turned on automatically based on impact detection by a sensor or manually by the driver, the pressing member is heated by the electric heating element 11. 10 deforms and expands. This pressing member 10
Since one end of the lever is restrained by the casing, the other end presses the lever holder 9, causing it to tilt. As a result of this tilting, as shown in FIGS. 6 and 7, the hook 22 of the lever holder 9 that was engaged with the lever body 8 is disengaged, and the lever body 8 is rotated downward by its elastic force. Push down the metal fitting locking member 6. And with this push down,
The connecting fitting 2 is now in a state where it can be pulled out. Since the insertion portion 3 of the connecting fitting is biased by a spring (not shown) inside the main body fitting, the insertion portion 3 is automatically removed from the main body 1 due to its action.

Generally, when the connecting metal fitting is manually removed in a normal seatbelt wearing state, the metal fitting locking member 6 can be pushed down with a force of 1 kilogram or less. On the other hand, in an accident, etc., when a disoriented passenger leans on the seat belt and a very large tension is applied to the belt, the through hole 4 on the connecting fitting side and the engaging protrusion on the main body fitting side 15 becomes very strong, and pushing down the metal fitting locking member 6 requires a large force of 6 to 7 kg. In this regard, in the present invention, a large pushing down force can be obtained by the biased lever body 8, and therefore, regardless of the strong engagement state between the through hole and the engagement protrusion, the metal fitting locking member 6 is pushed down and connected. The metal fitting 2 can be appropriately released.

In addition, due to the downward rotation of the lever body 8 as described above, the contact between the energizing contact 2 and the lever body 8 is lost, and thereby the electric heating element 11 is no longer energized, so that the electric heating element overheating is properly prevented.

In addition, in the present invention, since it takes a certain amount of time (several seconds or less) for the pressing member 10 to heat up and expand, the metal fittings do not come off instantly after an impact due to an accident, and the seat belt cannot be fastened until immediately after the impact. The state can be maintained.

When the pressing member 10 cools, it returns to its original curved state and the lever holder 9 is no longer pressed.
When the lever body 8 is lifted with a finger, the hook 2
2 is hooked and becomes operational again.

〔Effect of the invention〕

According to the present invention described above, the shield can be easily and quickly released in the event of an emergency such as an accident.
This allows the driver, etc. to quickly escape from the vehicle. In particular, the seatbelt attachment/detachment fittings are located in the center of the vehicle, so even if an attempt is made to rescue a passenger in the event of an accident, it may take time to release the attachment/detachment fittings from outside the vehicle. It is also an extremely effective means of solving problems.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a partially cutaway side view, FIG. 3 is a longitudinal sectional view, and FIG. 4 is a partially cutaway plan view. is a perspective view showing the attached state of the connection release member and the metal fitting locking member;
Fig. 5 is a perspective view partially showing the lever body, lever holder, and pressing member, Fig. 6 is a longitudinal cross-sectional view showing the lever body, lever holder, and pressing member in a disconnected state, and Fig. 7 is a disconnected lever body, lever holder, and pressing member. It is a perspective view shown in a state.
FIGS. 8 and 9 are side views showing other embodiments of the pressing member, respectively. 10 to 12 are longitudinal sectional views showing other embodiments of the present invention. In the figure, 1 is the main body metal fitting, 2 is the connecting metal fitting, 3
is the insertion part, 4 is the through hole, 5 is the casing, 6 is the metal fitting member, 7, 7' are the connection release members, 8, 8' are the lever bodies, 9, 9' are the lever holders, 10 is the press 11 is an electric heating element, 12 is a current-carrying contact, 15 is an engaging protrusion, and 22 is a hook.

Claims (1)

[Scope of utility model registration request] It consists of a main body metal fitting and a connecting metal fitting that is removably connected to the main body metal fitting, the connecting metal fitting has an engaged part in the main body metal fitting insertion part, and the main body metal fitting has an engaging part in the main body metal fitting insertion part. a casing having an engaging part to be engaged with the engaged part of the connecting fitting, and a fitting locking member provided in the casing so as to be able to be pushed down using the end on the insertion port side as a fulcrum; a disconnecting member slidably or tiltably attached to the casing to push down the metal fitting locking member when operated; one end capable of engaging with the metal fitting locking member and biased to push down the metal fitting locking member; A lever body is attached to the casing via the other end, and a hook is provided at one end to removably engage with the lever body to hold the lever body against the biasing action. The lever holder is attached to the casing so that it can be tilted by the casing, and the lever holder is configured so that its length in the linear direction is expanded by deformation due to heating, and this expansion causes the lever holder to engage the hook with the lever body. A seat belt consisting of a metal pressing member whose one end is attached to the casing side and whose other end is engaged with a lever holder, and an electric heating element attached to the pressing member. Detachable metal fittings.