JPS62253552A - Seat belt hooking device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the designing of the installation position from being restrained and remove an unnecessary projecting article inside a car by arranging a hook driving device inside the door of the car, separating from a hook. CONSTITUTION:A body 1 into which a hook driving device and a limit switch are housed is equipped with a rack pinion 2, and a rack 3 is meshed with said pinion 2. A rack supporting plate 4 is integrally connected midway on the rack 3, and the other edge part of the rack supporting plate 4 is connected with the lower edge part of a round-rod-shaped hook 6 through a connecting pin 5. Said hook 6 penetrates through the inside part of a hook holding part 7 installed onto the upper part of the body 1 independently from the hook driving device, and forms a guide for moving the hook 6 in sliding in the vertical direction by the hook holding part 7. The body 1, pinion 2, rack 3, supporting plate 4, and the holding part 7 are arranged inside the door lining D'.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a seat belt latching device for a vehicle, and more specifically, a seat belt latching device that automatically fastens a seat belt while an occupant is seated on the seat. Regarding equipment.

(Background Art) Recently, the wearing of seat belts has become legally obligatory, and for this reason, various seat belt devices for vehicles have been provided that automatically fasten the seat belt while the occupant is seated in the seat. It has been done. For example, FIG. 19 shows a seat belt latching device 50 that is attached to the inside of a door and that latches and releases the seat belt.
In the figure, 51 is a retractable hook on which the seat belt is hooked, 52 is a main body with a built-in hook drive device consisting of a motor, gear mechanism, etc., 53 is a cover,
D' indicates the inner lining of the door.

However, in this seat belt hanging bag [50, the hook 51 and the main body 52 are integrally formed,
Furthermore, since the position of the hook 51 inside the door is limited to a certain extent, the mounting position of the seat belt latching device 50 is also naturally limited and is subject to design constraints. Further, when a drive unit such as a power window is housed inside the door, there is a problem in that a mounting space for the main body 52 cannot be secured.

Furthermore, although only the hook 51 needs to be exposed on the inside of the door in terms of functionality, the main body 52 itself protrudes inside the door, spoiling the aesthetics of the interior of the car and making it difficult to get in and out of the car or while driving. There were problems such as sometimes getting in the way of passengers.

(Object of the Invention) The present invention has been proposed in view of the above points, and its object is to separate the hook and the hook drive device so that the mounting position of the main body including the hook drive device can be changed. To provide a seat belt latching device for a vehicle that increases the degree of freedom, allows a hook drive device to be housed inside a door, eliminates unnecessary protrusions toward the interior of the vehicle, and thereby improves the aesthetic appearance of the interior of the vehicle and the mobility of occupants. There is a particular thing.

(Disclosure of the Invention) The present invention will be described below with reference to the drawings. Figures 1 to 7
The drawings show a first embodiment of the present invention. First, FIG. 1 is a side view showing the installed state of the present invention. In the figure, 1 indicates a hook drive device HD and a limit switch 22.2, which will be described later.
3, etc., and includes a rack and pinion 2 that is indirectly connected to the output shaft of a motor 10, which will be described later. A rack 3 is engaged with the rack pinion 2, and the rack 3 extends upward from the main body 1.

A hook support plate 4 is integrally connected to the middle of the rack 3, and the other end of the hook support plate 4 is connected to the lower end of a round rod-shaped hook 6 via a connection pin 5. The hook 6 passes through a hook holding part 7 attached to the upper part of the main body 1 independently of the hook driving device HD, and the hook holding part 7 serves as a guide when the hook 6 slides in the vertical direction. It consists of

On the other hand, D' is the lining of the vehicle door, which includes a main body 1, a rack and pinion 2. Rack 3. The hook support plate 4, a portion of the hook holding portion 7, etc. are all arranged inside the lining D'. A hook 6 and a hook support plate 4 that holds the hook 6
The minimum necessary members, such as a part of the hook holding part 7, are protruded from the outside of the inner lining D', in other words, the inside of the vehicle, and the cover 8 is attached to cover these parts. In addition, in the figure, B indicates a shoulder belt as a seat belt.

Next, to explain the internal structure of the main body 1 in detail, as shown in FIGS. 2 and 3, a motor lO that can be rotated forward and backward is fixed to the inner surface of the frame 9 that constitutes the main body 1.
A worm gear 12 whose tip end is held by a bearing 11 is attached to the output shaft of the worm gear 12, and the worm gear 12 meshes with a worm wheel 13. A first intermediate gear 14 is coaxially and integrally fixed to the worm wheel 13 via a shaft 15.
The first intermediate gear 14 meshes with a second intermediate gear 16 arranged laterally thereto.

The second intermediate gear 16 is integrally attached to a camshaft 19 which is pivotally supported on the frame 9 via bushes 17 and 18, as shown in detail in FIG. The rack pinion 2 is the second intermediate gear 16
is mounted coaxially with.

These motors10. Worm gear 12. Worm wheel 13. First intermediate gear 14. second intermediate gear 16,
A hook drive device HD is constituted by the rack and pinion 2f, the rack 3, the hook support plate 4, and the like.

Next, as shown in FIGS. 2 to 4, cams 20, 21 having different shapes are integrally formed below the second intermediate gear 16, and each cam 20, 21 is located close to the second intermediate gear 16. Each actuator of limit switches 22 and 23 arranged as shown in FIG. These limit switches 22 and 23 are for stopping the rotation of the motor 10 and electrically braking the motor 10 to reduce the kinetic energy of the rack 3 due to inertia.
It is connected to the drive circuit of the motor 10 as shown in FIG.

That is, in FIG. 5, the power supply Vcc and the ground GN
A series circuit consisting of a relay contact S, a motor 10, a relay contact S2, and a limit switch 23 is connected between D and D so that the current flowing into the motor 10 is in the opposite direction. The series circuit consisting of the limit switches 22 is connected in a back-to-back manner, and the terminals at both ends of the motor 10 are connected to the normally open contacts N OL and N O2 of each limit switch 22, 23, respectively. In addition, in the figure, NC, NC, the normally closed contact of the beam switch 22, 23, NOs, N
04 is relay contact S1. Normally open contact of S, NC,, N
Similarly, C indicates a normally closed contact, and C indicates a common contact. Note that here, relay contact S1. S2 is provided in a control section (not shown) together with a relay coil and the like.

Next, this operation will be explained. First, relay contact S1. S
2 and limit switches 22 and 23 are in the state shown by the solid line in FIG. 5, the hook 6 protrudes from the top surface of the cover 8 on the inside of the door as shown in FIG. When the vehicle is in the vehicle, approximately the middle portion of the shoulder belt B is hooked to the hook 6, and the entire shoulder belt B is stretched inside the vehicle.

Here, in FIG. 6, 31 is a buckle, 32 is a guide ring, 33 is a belt winding device, 34 is a seat, and D is a door.

Now, when the passenger sits on the seat 34 and closes the door D, 1
For example, a load sensor disposed at the bottom of the seat 34 or an opening/closing sensor for the door D (none of which are shown) detects this, and the relay contact S2 is connected to the interior of the room as shown by the broken line in FIG. 5 via the control section. Switch to the indirect point NO, side. As a result, the power supply Vcc is connected to the ground GN via the relay contact S□, the motor 10, the relay contact S2, and the limit switch 23.
A circuit leading to point D is formed, and the motor 10 rotates forward. Therefore, the rotation of the motor 10 is transmitted to the worm gear 12, decelerated by the worm wheel 13, and then transmitted to the second intermediate gear 16 via the first intermediate gear 14 and decelerated.

As a result, the rack pinion 2 coaxially connected to the second intermediate gear 16 rotates to lower the rack 3, thereby lowering the hook 6 connected to the rack 3 via the hook support plate 4. Thereafter, when the rack 3 reaches the bottom dead center, the hook 6 is completely retracted into the cover 8, so that the shoulder belt B is tightly attached to the upper body of the occupant as shown in FIG.

In addition, when the hook 6 is completely retracted, the cam 21
drives the limit switch 23, which makes the normally closed contact NG.
, and contact the normally open contact NO□, the power to the motor 10 is cut off and the motor 10 is stopped. At this time, both terminals of the motor 10 are at the same potential, so the current of the motor 10 is forced to O, and an electric brake is applied to the motor 10 to rapidly stop its rotation, preventing the rack 3 from overriding. do. During this time, the relay contact S2 switches to the normally closed contact NC4 side.

In this way, when driving the vehicle with the hook 6 recessed inside the cover 8, and then stopping and getting out of the vehicle, for example, a sensor that detects that the engine has stopped is used to constantly close the relay contact S□ via the control unit. Switch to the open contact NO1 side, and connect the relay contact S2 from the power supply Vcc. A circuit is formed through the motor 10, the relay contact S1, and the limit switch 22 to the ground GND, and the motor 7 is reversed.

As a result, the rack 3 and the hook 6 rise through the same power transmission path as described above, and the hook 6 protrudes from the upper surface of the cover 8, so that the first occupant hooks the shoulder belt B to the hook 6, as shown in FIG. 6 again. condition and get off the car.

When the rack 3 and the hook 6 are raised, the limit switch 22 is switched by the cam 20, and the motor 10 is electrically braked to prevent the rack 3 from overriding as described above.

Next, FIG. 8 shows a second embodiment of the present invention. In this embodiment, the rack 3' and the hook 6 are connected to the hook support plate 4.
By connecting the hook 6 and the hook drive device HD separated from the hook 6 in a substantially straight line through the connecting pin 5, the main body 1 including the hook 6 and the hook drive device HD separated from the hook 6 can be further separated from each other than in the first embodiment. It was designed so that the Also,
The hook 6 is held by a hook holding part 7' that is separate from the main body 1, and this hook holding part 7' is attached to the door lining D' by a fixing member 24 such as a bolt or nut, similar to the main body 1.
It is fixed to a suitable mounting plate 25 inside the ``.

Note that the internal structure of the main body 1 and the operation of the hook 6 when it is driven are the same as those in the first embodiment, and therefore their description will be omitted to avoid duplication.

In this embodiment, all the components other than the hook 6 are housed inside the inner lining DJl, and there are no unnecessary protrusions on the inside of the vehicle, so it is more suitable from an aesthetic and functional standpoint. Furthermore, since the main parts of the main body 1 are common in the first and second embodiments, the rack 3.3', the hook support plate 4.4', and the hook holding part 7 may be changed depending on the shape and structure of the door D.
, 7'' can be used by replacing them, making it extremely economical.

Here, the shape and structure of the rack etc. are not limited to the illustrated example, and various modifications are possible.

Next, FIGS. 9 to 14 show a third embodiment of the present invention. In this embodiment, the hook 6 and the hook driving bag @H
D' are connected by a drive belt 37.

That is, as shown in FIG. 9, a drive gear 36 which is a component of the hook drive bag @HD' is housed in the cover 9a of the frame 9 of the main body 1', and this drive gear 36 is located above the main body 1'. It is connected to a drive belt 37 extending toward.

The drive belt 37 is formed into a belt shape of flexible plastic or the like, and is connected to the drive gear 36 through a plurality of connection holes 37a bored therein at appropriate intervals.

Further, the drive belt 37 heads upward along a belt guide 38 attached to the mounting plate 30 inside the lining D I 1 of the door D, and touches the lower end of the hook 6 slightly below the upper end of the lining D''. This hook 6 is connected to the lining D T by a bracket 39 fixed to the upper end of the mounting plate 30 inside the lining [ ) j l.
The drive belt 3 is held so as to be freely retractable from the upper end of the
It is separated from the hook drive device 1HD' in the main body 1' via 7 below.

The internal structure of the main body 1' is as shown in FIG. 1O, and is the same as the previous embodiment except that a drive gear 36 is connected to the camshaft 19 instead of the rack and pinion 2 in the first and second embodiments. It has virtually the same structure. As described above, the drive gear 36 is connected to the drive belt 37 and thus to the hook 6 by meshing with the plurality of connection holes 37a of the drive belt 37, as shown in FIG. Note that in this embodiment, the motor 10. Worm gear 12. Worm wheel 13. First intermediate gear 14.
The second intermediate gear 16, the camshaft 19, the drive gear 36, and the like constitute a hook drive device HD'. Thus, as shown in FIG. 12, the main body 1' is attached to the lower part of the interior of the door D, and the other end of the drive belt 37, whose one end is fixed to the hook 6, is not fixed and is in a free state. It has become.

As in the previous embodiment, the operation is performed by switching the relay contact S ts2 when the occupant is not on board and when the occupant is on board the drive gear 3.
6 is rotated in the forward and reverse directions, and the hook 6 emerges and retracts via the drive belt 37, whereby the shoulder belt B is latched or unlatched as shown in FIG. 13 or 14. .

According to this embodiment, the main body 1'' and the hook 6 can be arranged further apart from each other compared to the first and second embodiments, so that the degree of freedom in selecting the mounting position of the main body 1' is further expanded. This is useful for design purposes.

Next, FIGS. 15 to 17 show a fourth embodiment of the present invention. In this embodiment, the drive gear 36 is disposed at a position perpendicular to the axial direction of the second intermediate gear 16''.
A bevel gear 40 is integrally formed, and these pivots 41
A second bevel gear 43 that meshes with the first bevel gear 40 is attached to one end of the pivot 42 perpendicular to , and a drive gear 36 is fixed to the other end of the pivot 42 . Further, the second intermediate gear 16' has a third intermediate gear 44.
The intermediate gear 44 and the cam 20.21 are disposed coaxially. Here, the other internal structure of the main body 1'' is the same as that of the third embodiment, so a description thereof will be omitted. In the figure, HD'' indicates a hook driving device.

In this embodiment, the drive gear 36 is driven via the first bevel gear 40 and the second bevel gear 43 driven by the second intermediate gear 16', and the drive belt 37 is driven by the forward and reverse rotation thereof. Hook 6 appears.

Further, as shown in FIG. 17, the main body 1'' is disposed below the inside of the door D as in the third embodiment, and the hook 6 is connected to the hook drive device HD'' including the drive gear 36 via a drive belt 37. They are connected vertically.

In particular, in this embodiment, the thickness d of the main body 1'' is as shown in FIG.
Most of the outer diameter of the drive gear 36 can be accommodated in the
There is an advantage that the device can be made thinner than the third embodiment.

Next, FIG. 18 shows a fifth embodiment of the present invention. In this embodiment, the drive belt 37 in the third embodiment is bent, and the main body 1' is shifted rearward from directly below the hook 6 and placed inside the door D.
This has the effect of allowing more freedom in selecting the mounting position of .

In each of the above embodiments, the case where the seat belt is attached to the driver's body has been described, but it goes without saying that the present invention can also be applied to other types of animals and large luggage.

In addition, the present invention can of course be used by being attached to the passenger seat side of a vehicle.

(Effects of the Invention) As described above, according to the present invention, there is provided a retractable hook for hooking a seat belt that can be attached to an occupant on a seat of a vehicle, and for releasing the hook for the seat belt. In a vehicle seat belt latching device comprising a hook drive device that drives the hook depending on the presence or absence of the occupant, the hook drive device is separated from the hook and disposed inside the door of the vehicle; Compared to the past, the degree of freedom in selecting the mounting position of the main body including the hook driving device is increased, and it is possible to mount the main body at a desired position depending on the structure of the door, etc.

In addition, by housing the hook drive device inside the door, it is possible to reduce the amount of objects protruding into the interior of the vehicle, contributing to improving the aesthetics of the interior of the vehicle, and improving the mobility and safety of passengers when getting in and out of the vehicle and when driving. It has the effect of increasing the

4. Brief explanation of the drawings.

1 to 7 show a first embodiment of the present invention, FIG. 1 is a side view showing the installed state, FIG. 2 is a front view showing the internal structure of the main body, and FIG. 3 is a second embodiment of the present invention. 4 is an explanatory diagram of the cam, FIG. 5 is a motor drive circuit diagram, FIGS. 6 and 7 are perspective views showing the state of use, and FIG. 8 is an illustration of the present invention. FIGS. 9 to 14 are side views showing the second embodiment, and FIGS. 9 to 14 are side views showing the third embodiment of the present invention.
Fig. 10 is a sectional view showing the internal structure of the main body, Fig. 11 is an explanatory view of the main parts, Fig. 12 is an explanatory view showing the installed state, Figs. 13 and 14 are perspective views showing the use state, and Fig. 15 The figures to FIG. 17 show a fourth embodiment of the present invention.

Fig. 15 is a front view showing the internal structure of the main body, Fig. 16 is a sectional view taken along line E-E in Fig. 15, Fig. 17 is an explanatory view showing the installed state, and Fig. 18 shows the fifth embodiment of the present invention. FIG. 19 is a side view showing a conventional example.

6... Hook 34... Seat 36... Drive gear 37... Drive belt B... Shoulder belt as a seat belt D... Door HD, HD', HD"... Hook drive device Figure 1 Figure 3 Figure 1 Mo'r q's and others '21 '20D Figure 4 Figure S Figure 8 B (', I ('') C\'' N 糎

Claims (3)

[Claims] (1) A retractable hook that hooks a seat belt that can be attached to an occupant on a seat of a vehicle and can release the hook, and a hook drive device that drives the hook depending on the presence or absence of the occupant. 1. A vehicular seat belt latching device comprising: the hook drive device being separated from the hook and disposed inside a door of the vehicle. (2) The vehicle seat belt latching device according to claim 1, wherein the hook is driven via a drive belt connected to a hook drive device. (3) The hook drive device is provided with a drive gear that meshes with a connecting hole provided in the drive belt.
Seat belt latching device for vehicles as described in .