JPS6075004A - Buckle of seat belt - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a buckle for a seat belt of a thin button type used in automobiles, aircraft, etc., and in particular, the buckle of a seat belt with a built-in spring member is used to attach and detach a tank. This invention relates to a seat belt buckle designed to perform the following steps.

[Technical background of the invention and its problems]

Generally, in this type of seat belt buckle, when the tank is inserted into the buckle main body, the latch engages with the latch engagement tag of the tank and is locked, thereby preventing the tank from being pulled out.

In this type of seat belt buckle, once the tank is fully inserted into the buckle body and locked, even if an impact is applied to the buckle, the tank remains in the locked state without being released from the latch. The problem has been how to configure it so that it can be held securely, and the button for releasing the launch engagement can be operated with light force. In addition, conventional seat belt buckles have extremely complex grooves and a large number of parts, making the buckle difficult to assemble and resulting in high costs.

[Purpose of the invention]

This invention takes the above-mentioned points into account, and has a small number of parts, a simple internal groove structure, and easy assembly.The present invention also enables the launch engagement and release of the tank by operating a button.
An object of the present invention is to provide a seat belt buckle that can be easily and reliably fastened.

[Summary of the invention]

In order to achieve the above-mentioned purpose, the seat belt buckle according to the present invention includes a base having a horizontal plate part and side plate parts cut and raised almost vertically on both sides, and a seat belt buckle formed on both side plate parts of the base. The lug is inserted into the support hole, and the launch is supported to be swingable between a release position (it) and a lock position, and the launch is attached to the base so as to constantly bias the launch toward the lock position. a tabular spring member, a bushing button having an ear shaft rotatably attached to the front end of the side plate portions of the base, and inserted along the upper surface of the base;
a tongue that engages with and locks the latch, and the button has a locking protrusion that is engageable on the front end side of the lunch, and when the button is pressed, the button locks the button. The latch is made to swing to the release position against the spring force of the spring member.

[Embodiments of the invention]

An embodiment of the seat belt buckle according to the present invention will be described with reference to the accompanying drawings.

1 and 2 are perspective views showing essential parts of the seat belt buckle according to the present invention, and reference numeral 1.0 in the figures indicates the buckle body of the button-type buckle. The buckle main body 10 has a base 11, and a plate-shaped horizontal plate part [2 is formed in the center of the base [1]. Both sides of the horizontal plate portion 120 are cut and raised substantially vertically to form side plate portions [3]. Support holes E4 are formed opposite to each other in the front of the intermediate part of the side plate part [3, and a bulge part [5] bulging outward is formed at the rear of the support hole 14 in the shape of J. The inner side is configured as a guide groove [7] that guides a latch [6, which will be described later. The rear of the guide groove [7 is cut out diagonally upward,
It is connected to the guide groove 18 that opens at the rear end, and has a guide groove.
The front side of 7 is connected to the support hole [4]. The latch (6) inserted from the rear Gytro E8 is guided through the guide groove [7 and reaches the support hole [4], and is supported in the support hole [4 so as to be swingable between the tank release position and the lock position. be done.

As shown in FIGS. 3 and 4, the latch 16 is constructed by integrally molding the base plate side and the balance weight part 21 into a substantially dogleg shape, and the center part of the base plate protrudes downward. A recess is formed, and this recess is configured as a latch pawl n. A retaining hole for positioning is bored approximately in the center of each of the four parts, while ears U are integrally molded at both ends of the base plate, and these ears M form the aforementioned support holes of the base 11. 4 and supported on both sides. At that time, the ear axis line (swinging center line) C connecting both ear parts U
The latch [6 is adjusted by the balance weight part 21 so that it passes through the center of gravity of the I4 latch 16, and the lug axis CL of the latch [6] passes through the center of gravity, so that even if an impact load is applied to the base 11, the latch [6 will be adversely affected] There aren't many things.

The latch 16 is held on the base L1 by a spring portion 5 shown in FIG. 5 so as to be always biased toward the lock position. The spring member 5 is constructed as shown in FIGS. 2, 3, and 5, and has side locking portions that lock into the support holes [4] of the base side plate portions. The side locking part A has a locking claw 26a that protrudes upwardly inwardly and outwardly, and the locking claw 26 with
m is engaged with and positioned in the upper engagement groove 14a of the support hole [4. The legs of the locking portion on both sides are connected by a locking spring portion n. This lock spring part n curves downward in an arc shape, and a positioning protrusion protruding downward is formed in the center thereof, and this positioning protrusion path engages with the positioning hole β of the latch [6, The spring is always biased toward the locked position. At this time, the engagement restricts the movement of the latch [6 in the front-rear direction.

Further, a return spring portion 29 extends forward and upward from the center of the lock spring portion n of the spring member 5. The return spring force is adjusted by the window hole 29a and the bulge 29b formed on the base side, while the bulge 29b has its base side and tip side punched out on the window hole side. Punching line 2
Although the connection state is broken by 9c, in order to prevent the spring members B from getting entangled with each other during assembly, the punched wire portions are butted against each other and aligned in the same plane while the spring member 5 is free. be located.

Further, the return spring part comes into contact with the ventral side of the button 30 which is t&vf-, and is always springing upward so as to return the button 30 to its original position.

The putunyu button (g) may be made of a resin material (golden material) as shown in FIG. 3 and FIGS. 6 to 8.

), and its front end is reinforced with a thick part formed in the width direction. A pair of ear shafts 31 projecting laterally are integrally molded on both sides of the front end of the 7-button joint, and these ear shafts 31 are formed on the front ends of the base side panels E3 as shown in FIG. It is rotatably engaged with the engaging grooves 32 that form a pair. The ear shaft 31 may be made of a material different from that of the button, for example, a metal material, in which case the ear: +t
b3] may be integrally molded by press-fitting the bushing button (g) onto both sides of the front end.

Further, the retaining groove 32 is open to the front, and the bushing button 30 is attached and detached from this opening.

The bushing button 30 held in the engagement groove 32 is supported on the guide inner support protrusion 33. This inner support protrusion 33 is located opposite to the F section adjacent to the engagement groove 32,
It is formed by bending the front end protrusion of the base inward. The upper surface of the support protrusion is formed as a support surface that supports the ear shaft 31, and the lower surface is formed as a guide groove that guides insertion of a tank 38, which will be described later.

At that time, if the support surface of the retaining groove 32 that supports the ear shaft 31 is made into a curved surface groove structure corresponding to the ear shaft 31, the ear shaft 31
It becomes easier to assemble.

Further, a pair of retaining protrusions 34 are integrally molded on the proximal side of the button 30 so as to bulge out on both sides. This engagement protrusion engages with the front end (balance weight part) side of the latch [6, and when the button button: ■ is pressed down, the balance weight part 21 of the latch [6 is pressed down and the latch [6 is released]. It is designed to be brought to the position side.

By the way, the horizontal plate portion I2 of the base 11 and the latch [
A guide path 39 for guiding insertion of the tank 3B is formed between the spring member 6, the spring member 25, and the guide support protrusion 33,
The tongue 38 is taken in and out through this guide path 39. As shown in FIGS. 1 and 2, the tank 38 has a latch engagement hole 40 that can be engaged with the launch [6] and a mounting hole 41 that is attached to the webbing of a seat belt.

By approaching the tank 38 from the front of the buckle main body IO and inserting it along its guide path 39, the insertion end of the tank is pushed open against the spring force of the spring member B. By further inserting the tongue from this state, the launch [6] engages with the latch engagement hole 40 by the action of the spring force of the spring member 5, and the tank 38 is locked and completely engaged with the launch. . This restricts removal of the tongue.

Further, after the buckle main body [O] is assembled as shown in FIG. 1, it is covered with a cover 44. The cover 44 is constructed as shown in FIGS. 3, 9, and 10, and has an opening 45 at the top for pressing the button I. A guide column 46 is suspended from the front top of this opening 45. The guide column 46 passes through the guide hole 47 of the button and the window hole 29a of the spring member 5 for guidance. A webbing attachment hole 48 is formed at the rear end of the cover 14, and the seat belt webbing (not shown) is passed through this attachment hole 48 and the attachment hole 49 of the base 11.
Installed.

Next, the function of the buckle of the button-type seat belt will be explained with reference to FIG.

Before inserting the tank into the buckle body [0], the buckle is held as shown in FIG. The held button I is maintained at the original position by the stopper action of the stopper portion 44a of the cover 44. On the other hand, the latte [6 is spring-biased toward the lock position by the spring action of the lock spring portion 27 of the spring member 5, and is held at that position.

When the tank 38 is inserted along the guide path 39 K of the buckle body [0] from the state shown in FIG. It is pushed up to the release position side against the spring force of the lock spring part n of the member 2, making it possible to insert the tank deeper into the tank. When the tank 38 is further inserted from this state and the latch engagement hole 40 is inserted to the position corresponding to the latch [6, the launch [6] is suppressed toward the lock position by the spring force of the lock spring portion 35 of the spring member 5. It was moved and shown in Figure 1 (
As shown in B), the latch claw 22 of the launch 16 engages with the latch engagement hole 40, and the tank 38d is locked. As a result, the tongue is fully engaged in launch, and its removal is reliably and completely prevented. Also, when inserting the tank 3B into the buckle body [0, the launch [6] is always biased toward the lock position by the spring member B, so
By inserting the tongue a predetermined amount, the tank is securely locked, and false latch engagement is completely prevented.

When pulling out the tank tongue from the locked state (fully latched state) shown in FIG. By pressing down the button, the button 30 rotates around the locking protrusion 32 on the base, and the retaining protrusion 34 of the push button presses the balance weight part 21 of the latch 16 with a large force due to the principle of leverage. , and rotate the latch [6 against the spring force of the lock spring part n to the release position side as shown in Fig. 411 (C). This rotation of the latch [6 releases the engagement between the latch pawl a of the latch 16 and the latch retaining hole 40 of the tank, and the tank is opened and released. Therefore, the tongue can be easily pulled out from the buckle body.

In this case, the latch [6 is the side plate portion I of the base 11
The pivot axis dcL is connected to the latch 16 in the support hole [4] of 3.
The base body 1 is supported so that it passes through the center of gravity of the base body 1.
0v this big i! Even if Iii 4*K71j is added,
These two 3. Due to the latch 1R, the latch L6 does not automatically rotate to the release position and is not adversely affected by the rain deposits 1.

Next, FIGS. 12 and 13 show modified examples of this invention.
This will be explained with reference to the figures.

The buckle of the I'4M seat belt shown in this modification is different only in the shape of the ear shaft 31A of the zotsunyu button 30 and the engagement hole 32A formed in the front end of the base 11, and the other parts and benefits are the same. Since it is the same as that explained in the example, the same reference numerals will be used and the explanation will be omitted.

That is, what is shown in this modification is a notch F) that is diametrically opposed to the ear shaft 31A of the putunyu button 30.
( ) is formed along the axial direction, and this notch facilitates attachment and detachment of the bush button 30. Therefore, the groove width of the opening on the insertion side of the bushing button 30 of the engagement groove 32A is adjusted so that it corresponds to the notched ear shaft 31Aφ.
Upper part of 4 ports (F part may also be used) protruding part 51 for preventing protrusion
is formed. Other than that, the notch of the ear shaft 31A is formed so as to form a substantially vertical surface when the bushing button (2) is inserted and mounted at a predetermined position. As a result, the attached button is prevented from being pulled out or thrown out.

When removing the bushing button, it can be easily removed by rotating it approximately 90 degrees around the ear axis, holding it in this rotated state, and pulling it forward.

〔Effect of the invention〕

As described above, the seat belt buckle according to the present invention basically includes a base, a tank, a lunch,
Since it is composed of a spring member and a bush button and has a very small number of parts, it has a simple structure, is easy to assemble, and can be manufactured at low cost, making it economical.

In addition, since the spring member always biases the latch toward the lock position, the tongue engagement hole of the tongue is securely locked by the suppressing action of the spring force when the tongue is inserted to the corresponding position of the launch, and the latch is locked securely. Engagement is prevented in advance and reliably.

Furthermore, when pulling out the tank, simply press the button and the lever principle will smoothly guide the launch to the release position against the spring force of the spring member, ensuring that the tank is released. and can be easily removed.

In addition, if the pivot axis of the latch supported by the support hole formed in the side plate of the base passes through the center of gravity of the launcher, even if a large impact load is applied to the buckle,
The latch is not brought to the release position by this impact load and is not adversely affected by the impact load.

Furthermore, since the button button is supported by the ear shaft in the engagement groove at the front end of both side panels of the base, the support structure of the button button is simplified, and a retaining protrusion that engages with the latch is provided on the abdomen of the button button. Because of this, there is no need to attach the button to the front end of both side plates of the base via the attachment part of the spring member as in the past, and there is no need to form an attachment part or a launch engagement protrusion on the spring member. The structure of the spring member is also simplified, and it is possible to effectively prevent the spring members from becoming entangled with each other in a complicated manner during assembly.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the seat belt buckle according to the present invention with the cover removed, and Fig. 2 is a perspective view showing the buckle shown in Fig. 1 with the button removed. , FIG. 3 is an exploded perspective view of the seat belt buckle of the present invention, FIG. 4 is a perspective view of a lunch incorporated in the buckle, FIG. 5 is a perspective view of a spring member incorporated in the buckle, and FIG. Figure 6 is a plan view of Punyu Button, Figure 7 is a side view along line ■-■1 of Figure 6,
FIG. 8 is a bottom view of the button, FIG. 9 is a bottom view of the buckle cover, FIG. 10 is a sectional view taken along line X-X in FIG. 9, and FIGS. ) and (C) are simplified diagrams showing the action of attaching and detaching the buckle of the seat belt according to the present invention. 0... Buckle body, 11... Base, 12...
・Horizontal plate part, [3... Side plate part, [4... Support hole, [6
... Lunch, [7... Guide groove, processing... Base plate part, 21... Balance weight part, M... Ear part, 5... Spring member,... Side attachment Stop part, 27...Lock spring part, 29...Return spring part, Addition...Button button, 31.3LA...Ear 1 cut, 32.32
A...Engagement groove 1.33...Inner support protrusion, Ah...
Engagement protrusion: 38...Tang, 39...Guide path, 4
4...Cover, (capital)...Notch, 51...Protrusion for preventing protrusion. Applicant's agent Hisashi Hatano Figure 4, Figure 24 and Kano Figure 5: jb (Figure 8 of Figure 8)

Claims (1)

[Scope of Claims] 1. A base having a horizontal plate portion and side plate portions cut and raised substantially vertically on both sides, and an ear portion inserted into a support hole formed in both side plate portions of this base to a release position. a latch supported so as to be able to swing between the lock position and the lock position; a spring member attached to the base so as to always spring bias the launch toward the lock position; It has a bushing button to which a shaft is rotatably attached, and a tongue that is inserted along the upper surface of the base and engaged with and locked with the launch, and the bushing button is attached to the front end side of the launch. The locking projection has a locking projection that can be locked to the button, and when the button is pressed, the locking projection swings the launch to the release position against the spring force of the spring member. seat belt buckle. 2. Engagement grooves that open forward are formed in the front ends of the base side plate portions to face each other, and an ear shaft provided at the front end of the bushing button is supported in the engagement grooves. Seat belt buckles as described in scope 1. Inner support protrusions bent inward are installed opposite to each other adjacent to the lower portions of the engagement grooves formed on the front ends of the three-piece side plate portions, and a button is attached to the inner support protrusions. 2. The seat belt buckle according to claim 2, on which the ear shaft is placed. 4. The ear shaft of the Frisch button is formed with diametrically opposed notches extending in the axial direction, and the width of the insertion groove of the engagement groove is set to correspond to the notched ear shaft. A seat belt buckle according to claim 2. 5. A pair of retaining protrusions are integrally molded on the front of the abdomen of the button on both sides, and the engaging protrusions are engaged with the front end of the launch. Seat belt buckle as described. 6. The latch, which is swingably supported in the support holes of both side plate parts of the base, is configured such that the swing center axis connecting both ear parts passes through the center of gravity of the latch, as set forth in claim 1. seat belt buckle. 7. The latch is constructed by integrally molding a base plate portion and a balance weight portion in a substantially dogleg shape, and a launch pawl that projects downward is formed in the center portion of the base plate. Seat belt buckle as described. 8. The spring member includes a side locking portion that is locked in the support hole on both sides of the base, and a lock spring portion that connects the both side locking portions and biases the latch toward the lock position. and a return spring part that extends obliquely upward forward from the lock spring part and returns the button to its original position, and the lock spring part has one corner and a fixing part that engages with the positioning hole of the latch. The seat belt buckle according to claim 1, which has a protrusion. 9. The side plate portion of the base has a bulging portion that bulges outward,
The seat belt according to claim 1, wherein the inner sides of both the bulges are formed as guide grooves communicating with the support hole, and the latch is accommodated and held in the support hole by sliding on the guide groove. buckle.