JPH0227764Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a buckle for a seat belt of an automobile, etc., and particularly relates to a buckle of a type consisting of a buckle body and a tongue plate that can be engaged with the buckle body. This is related to the improvement of.

BACKGROUND ART As a structure of this type of buckle, the buckle main body has a substantially channel-shaped frame consisting of a bottom plate and side plates erected on both sides of the bottom plate, and a tongue plate insertion hole is provided at the end of the frame. form,
A hook plate is swingably supported above the bottom plate, and an engaging pawl that engages with the tongue plate is provided vertically at the end of the hook plate on the side closer to the insertion opening, and a round bar-shaped hook plate is provided above the hook plate. A release bar is installed, and both ends of the release bar are fitted into substantially L-shaped slits formed in the side plate, and an ejector for ejecting the tongue plate is provided between the bottom plate and the hook plate, and the release bar is slid. By sliding the button along the control slit in a direction away from the insertion opening, the hook plate is swung by the elastic force of the spring means interposed between the release bar and the tail of the hook plate, thereby engaging the tongue plate. There is a known device in which the tongue plate is ejected by an ejector after the lock is released. One example is that described in US Pat. No. 4,384,391.

Problems to be Solved by the Invention However, in this device, since the release bar is in the shape of a round bar, the contact between the release bar and the hook plate is a line contact, and when a large force is applied to the buckle, the hook plate presses strongly against the release bar. There is a risk that the hook plate may be damaged and a dent may be formed. If such a depression is formed, when the release bar is slid to disengage the buckle, the movement cannot be performed smoothly and a large force is required to disengage the buckle. Although it is possible to solve this problem by making the release bar a plate shape instead of a round bar shape as described above, the release bar may rotate during operation, making it difficult to achieve smooth operation.

In addition, in the conventional example, the lower end of the base of the hook plate is supported by the bottom plate, and when disengaging from the tongue plate, the hook plate is rotated in the releasing direction by the elasticity of the spring means.
There is a risk that the hook plate and the tongue plate may not rotate smoothly due to the frictional force between them, and there is a possibility that the buckle may not be able to be detached even if it is attempted to be detached when a tensile force is applied to the buckle.

The present invention was developed in view of the above circumstances, and it is an object of the present invention to provide a buckle structure that can withstand a large load and can be easily released with a constant small release force.

Means for Solving the Problems The present invention comprises a buckle body and a tongue plate that can be engaged with the buckle body, and the buckle body has a bottom plate that forms an insertion path for the tongue plate on its upper surface. , has a substantially channel-shaped frame consisting of side plates erected on both sides of the bottom plate, a buckle support member is attached to one end of the frame, a tongue plate insertion opening is formed at the other end, and The side plate is provided with a control slit in which a bulge that bulges upward is formed in a portion far from the insertion port, and an edge of the bulge in the control slit that is closer to the insertion port is formed into an inclined edge. A hook plate is provided above the bottom plate, and the end of the hook plate on the side far from the insertion opening is swingably supported with respect to the frame at a position sufficiently away from the bottom plate. At the tip of the plate near the insertion opening, an engagement claw that engages with the tongue plate is vertically provided through the insertion path of the tongue plate, and a release bar is installed above the hook plate. , inserting both ends of the release bar into the control slit;
A supporter is integrally attached to the release bar, the supporter is made slidable along the hook plate, and the supporter is biased with respect to the hook plate in a direction toward the engaging claw by a spring means, An ejector that is slidable along the insertion path of the tongue plate is provided between the bottom plate and the hook plate, and the ejector is always moved in a direction approaching the insertion opening by a spring means, so that the tip of the ejector is moved almost toward the insertion opening. The invention is characterized in that a manual operating member is provided for biasing the release bar into alignment with the opening and for sliding the release bar along the control slit in a direction away from the insertion opening.

The present invention will be explained below with reference to the drawings.

In the drawings, A is the buckle body and B is the tongue plate. 1 in buckle body A
1 is a frame, and the frame 1 has a channel-like cross-section, and includes a bottom plate 2 whose upper surface serves as an insertion path for the tongue plate B, and side plates 3 erected on both side edges of the bottom plate 2.

A wire 4 serving as a buckle support member is fixed to one end of the bottom plate 2, and an insertion opening 5 for the tongue plate B is formed at the other end. A long hole 6 is bored in the center of the bottom plate 2, and a spring receiving piece 7 protrudes from the side of the long hole 6 closer to the wire 4.

A support hole 8 and a control slit 9 are bored in the side plates 3 . The support hole 8 is formed in the bottom plate 2.
The control slit 9 is formed at a position closer to the insertion opening 5 than the support hole 8 is. A portion of the control slit 9 close to the insertion port 5 forms a narrow narrow portion 10, and a portion far from the insertion port 5 bulges upward to form a bulge 11. The edge of 11 on the side closer to the insertion port 5 forms an inclined edge 12 .

13 is a hook plate. The hook plate 13 is provided above the bottom plate 2 of the frame 1, and wing portions 14 projecting on both sides of the end far from the insertion opening 5 are fitted into the support hole 8. It is provided so as to be swingable relative to the frame 1 about a point P in the portion 14 as a fulcrum.
The center of the tip of the hook plate 13 near the insertion opening 5 is bent downward to form an engaging claw 15.
On both sides of the engagement claw 15, upright pieces 16 are made to protrude diagonally upward. Thus, when the hook plate 13 swings downward, the engaging pawl 15 is fitted into the elongated hole 6 of the bottom plate 2. In addition, a through hole 1 is provided in the center of the hook plate 13.
A spring receiving piece 18 protrudes from one end edge of the through hole 17.

A plate-shaped release bar 19 is installed above the hook plate 13, and both ends of the release bar 19 are fitted into the control slit 9 and protrude from the outer surface of the side plate 3 to form a protrusion 20. There is. 21 is a supporter, and the holding part 2
2 holds the release bar 19, and the spring receiving part 23 fits into the through hole 17 of the hook plate 13 so as to be slidable along the hook plate 13 in the length direction, and the spring means 24 Therefore, the hook plate 13 is always urged in a direction toward the engaging claw 15.

25 is an ejector, and a pressing piece 26 is interposed between the bottom plate 2 and the hook plate 13.
The spring receiving part 27 is fitted into the elongated hole 6 of the bottom plate 2, and is slidable in the length direction of the buckle body A along the insertion path of the tongue plate B on the upper surface of the bottom plate 2. The elasticity of the spring means 28 always urges the insertion port 5 toward the insertion port 5 . Then,
When approaching the insertion port 5, the pressing piece 26
The tip of the holder is arranged so that it almost coincides with the insertion opening 5. 29 is a projection 29 projecting from the upper surface of the ejector 25, and 30 is a warning contact.

Reference numeral 31 denotes a slide button as a manual operation member for unbuckling the buckle. The slide button 31 has a substantially box-like shape with open bottom and rear surfaces, and is adapted to be able to slide along the frame 1 in the length direction of the buckle body A. The front side of the slide button 31 forms an operating section 32, and the lower half of the operating section 32 forms a tapered surface 33. Further, a recess 35 is formed at the bottom of the rear end of both side plates 34 of the slide button 31, and the protrusion 20 of the release bar 19 is fitted into the recess 35. Further, a rib 36 is formed on the back side of the operating portion 32, and a wedge-shaped protrusion 3 is formed at the lower end of the rib 36.
7 is provided in a protruding manner, and by sliding the slide button 31, the protrusion 37 can enter the lower part of the upright piece 16 of the hook plate 13 and come into contact with the protrusion 29 of the ejector 25. .

38 is a cover. The cover 38 consists of an upper cover 39 and a lower cover 40, and an opening 41 into which the slide button 31 fits is formed at the tip of the upper cover 39. Further, a tapered surface 42 is formed on the top surface of the tip of the lower cover 40, and a tapered surface 33 of the slide button 31 is formed.
A funnel-shaped tongue plate receiving portion is formed between the two.

On the other hand, the tongue plate B is attached to the buckle body A.
It has an insertion piece 43 that is inserted into the insertion piece 43, and an engagement hole 44 that engages with the engagement claw 15 is bored in the insertion piece 43.

1 and 2 show a state in which the tongue plate B is engaged with the buckle body A of the present invention. The insertion piece 43 of the tongue plate B is inserted from the insertion opening 5 of the buckle body A along the tongue plate insertion path on the upper surface of the bottom plate 2, and presses the pressing piece 26 of the ejector 25 with its tip edge, causing the spring means 28 to press. It resists elasticity and is biased to the left in the figure.

Further, the hook plate 13 swings in a direction in which the tip portion approaches the bottom plate 2 with the point P on the wing portion 14 as a fulcrum, and the engaging claw 15 penetrates the engaging hole 44 of the tongue plate B, and further extends over the length of the frame 1. It is inserted into the hole 6 and engages the tongue plate B.

The supporter 21 is biased toward the engagement claw 15 along the hook plate 13 by the elasticity of the spring means 24, and the release bar 19 held by the holding portion 22 is also located near the tip of the hook plate 13. , its both ends are the narrow part 1 of the control slit 9
It is inserted into 0. In addition, the slide button 31 is also pushed by the release bar 19 and the opening 4 of the cover 38 is pressed.
It stands out from 1.

In this state, the release bar 19 is located on the upper surface near the tip of the hook plate 13, and the release bar 19 is fitted into the narrow part 10 of the control slit 9, so that the hook plate 13 is moved upward. unable to sway,
The engagement pawl 15 is held engaged with the engagement hole 44 of the tongue plate B. Therefore, the tongue plate B will not be separated from the buckle body A and will not be pulled out.

Next, in order to separate the tongue plate B from the buckle body A, the operation part 3 of the slide button 31 must be
Press 2 by hand. As a result, the slide button 31 is pushed into the opening 41, and the edge of the recess 35 pushes the protrusion 20 of the release bar 19 in the same direction.
As a result, the release bar 19 and supporter 21
is deflected along the hook plate 13 in a direction approaching the point P, and the release bar 19 comes to the position of the bulge 11 of the control slit 9. This allows the release bar 19 to be biased upward, and the hook plate 13 to swing upward about the point P as a fulcrum.

On the other hand, a force is applied to the tongue plate B in the direction of pushing it out of the insertion port 5 via the ejector 25 due to the elasticity of the spring means 28, so that the edge of the engagement hole 44 of the tongue plate B is pressed against the hook plate 13.
is pressed against the engaging claw 15 of. In addition, since the hook plate 13 has a step between the point P, which is the fulcrum, and the engagement claw 15, which is the point of action, when the tongue plate B is pushed by the ejector 25, the engagement claw 15 has an upper part. Since the opposite force is acting and there is no longer anything to restrain the swinging of the hook plate 13 as described above, the hook plate 13 swings upward about the point P as a fulcrum.

Thus, the engaging claw 15 comes out of the engaging hole 44,
The tongue plate B is ejected from the insertion opening 5 via the ejector 25 by the elasticity of the spring means 28. The ejector 25 slides along the bottom plate 2 due to the elasticity of the spring means 28, and stops when the protrusion 29 abuts the protrusion 37 of the slide button 31. This state is shown in FIG.

Next, when the force of pressing the slide button 31 is removed, the ejector 25 is slid in the direction of the insertion port 5 by the elasticity of the spring means 28, and the protrusion 29 further pushes the protrusion 37, causing the slide button 31 to also slide. It is made to protrude from the opening 41. At this time, the tip of the ejector 25 is almost inserted into the tongue plate insertion port 5.
Move forward to the position.

On the other hand, the release bar 19 is a slide button 31
Since the pushing force is removed, the elasticity of the spring means 24 causes the supporter 21 to slide along the hook plate 13 in the direction of the tip, and both ends of the supporter 21 slide against the inclined edge 12 of the bulge 11 of the control slit 9. come into contact with Here, since the inclined edge 12 is inclined, a downward force is generated, and the hook plate 13 is pushed down in a direction approaching the bottom plate 2. However, since the ejector 25 is moving forward due to the elasticity of the spring means 28, the engaging claw 15 comes into contact with the upper surface of the ejector 25, and the hook plate 13 cannot swing downward any further. This state is shown in FIG.

Next, in order to engage the tongue plate B with this buckle body A, insert the tongue plate B into the insertion opening 5.
is inserted from the tip of the insertion piece 43. The tongue plate B is inserted while pushing the ejector 25 back along the upper surface of the bottom plate 2 against the elasticity of the spring means 28. When the engagement hole 44 reaches the position of the engagement claw 15 of the hook plate 13, the downward force generated on the release bar 19 due to the elasticity of the spring means 24 as described above causes the hook plate 13 to be pushed into the bottom plate 2.
, the hook plate 13 swings downward about the point P, and the engaging claw 15 engages with the engaging hole 44.

The release bar 19 then slides along the inclined edge 12 and when it reaches its lower end, due to the elasticity of the spring means 24, it slides further along the hook plate 13 together with the supporter 21, and the narrow part 1 of the control slit 9 is moved.
Insert into 0. Then, the state returns to the state shown in FIGS. 1 and 2 again.

Effects of the Invention According to the present invention, since the release bar 19 is plate-shaped, it makes surface contact with the hook plate 13, and does not damage the hook plate 13 unlike the round bar-shaped one in the conventional example. Therefore, the operation is smooth even when a large load is applied.

Further, the release bar 19 is held by a supporter 21, and the supporter 21 is connected to the hook plate 13.
Since the release bar 19 moves in parallel to the release bar 19, the release bar 19 does not inadvertently rotate or twist during operation, and can always operate in a stable state.

Further, according to the present invention, the point P is located at a sufficiently high position from the bottom plate 2, and the direction of the engaging pawl 15 when the hook plate 13 swings is directed toward the tongue plate B due to the level difference between the fulcrum and the point of action. When the release bar 19 is biased to the position of the bulge 11 of the control slit 9, the hook plate 13 can be immediately swung in the release direction by the force of the spring means 28, and the tongue plate B Even if a large tensile force is applied, the force acts on the hook plate 13 in the direction of disassembly.
The force required to release the buckle is small.

Furthermore, in conventional buckles, especially in the case of free-standing buckles, the insertion opening of the tongue plate faces upward, so it is possible for coins, etc. to be dropped there, which can cause malfunctions. However, according to the present invention, when not in use, the ejector 25 is almost at the position of the insertion slot 5, so that coins etc. cannot be inserted into the insertion slot 5. It's safe and you won't fall into it.

Furthermore, as described above, by forming the upright piece 16 on the hook plate 13 and providing the protrusion 37 on the slide button 31 that comes into contact with the upright piece 16,
If a malfunction occurs in the operation of the hook plate 13, the protruding portion 37 can enter the lower surface of the upright piece 16, push up the upright piece 16, and promote the rocking of the hook plate 13. Furthermore, the operation is reliable and safe. Become something.

[Brief explanation of the drawing]

The drawings show the buckle of the seatbelt of the present invention, in which Fig. 1 is a central vertical sectional view in the engaged state, Fig. 2 is a plan view showing the cover and slide button in the engaged state in cross section, and Fig. 2 is a cross-sectional view showing the seat belt buckle in the engaged state. FIG. 3 is a central vertical cross-sectional view of the buckle body in a state in which it has been released, and FIG. 4 is a central vertical cross-sectional view of the buckle body in an unused state. A... Batsukuru body, B... Tongue plate,
1...Frame, 2...Bottom plate, 3...Side plate, 4...
... Wire (buckle support member), 5 ... Insertion port,
9...Control slit, 11...Bulging portion, 12...
Inclined edge, 13... hook plate, 15... engaging claw, 19... release bar, 21... supporter, 24... spring means, 25... ejector,
28... Spring means, 31... Manual operation member.

Claims (1)

[Scope of utility model registration request] It consists of a buckle body A and a tongue plate B that can be engaged with the buckle body A. A buckle support member 4 is attached to one end of the frame 1, and a tongue plate insertion opening 5 is formed at the other end. A control slit 9 having a bulging portion 11 bulging upward in a portion far from the insertion port 5 and a narrow portion 10 in a portion close to the insertion port 5 is bored, and the control slit 9 The edge of the outlet 11 that is closer to the insertion opening 5 is an inclined edge 12, and a hook plate 13 is provided above the bottom plate 2, and the end of the hook plate 13 that is farther from the insertion opening 5 is a sloped edge 12. The hook plate 13 is swingably supported on the frame 1 at a position sufficiently distant from the bottom plate 2, and the tongue plate B is attached to the tip of the hook plate 13 on the side closer to the insertion opening 5.
An engaging pawl 15 that engages with the hook plate 1 is provided vertically downward through the insertion path of the tongue plate B.
A release bar 19 is installed above 3, and both ends of the release bar 19 are connected to the control slit 9.
and insert the supporter 21 into the release bar 19.
are integrally attached, the supporter 21 is made slidable along the hook plate 13, and the supporter 21 is biased with respect to the hook plate 13 in a direction approaching the engagement claw 15 by a spring means 24, The bottom plate 2 and the hook plate 13
An ejector 25 that is slidable along the insertion path of the tongue plate B is provided between the tongue plate B and the tongue plate B.
The ejector 25 is constantly biased by the spring means 28 in a direction approaching the insertion opening 5 until its tip substantially coincides with the insertion opening 5, and the release bar 19 is moved along the control slit 9 from the insertion opening 5. A seat belt buckle, characterized in that it is provided with a manual operation member 31 that is slid in the direction of separation.