JPH0216646Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (1) Industrial application field The present invention is based on a buckle for the chin strap of a helmet, especially a buckle that is attached to the tip of the chin strap that extends downward from one side of the cap body. and a receiver suspended from the other side of the cap body, a locking ring is formed at the tip of the insert, and a locking ring is formed on the receiver to engage with the locking ring. A locking pawl is fixedly installed to obtain the locking ring, and a locking position is set between a locking position where the locking ring is restrained in an engaging position with the locking pawl and an unlocking position where the locking ring is allowed to be disengaged from the locking pawl. The present invention relates to a device in which a movable locking member is slidably fitted and a locking spring is connected to the locking member for biasing the locking member toward the locking position.

(2) Prior Art Such chin strap buckles have already been used in riding helmets.

(3) Problems to be solved by the invention In such a chin strap buckle, when separating the connected receiver and the insert, it is not possible to simply move the locking member to the non-locking position. Since the locking ring remains engaged with the locking claw of the receiver,
The separation state cannot be obtained, and therefore the user must next perform an operation to separate the locking ring from the locking pawl, which is not only a troublesome operation, but also removes the locking ring from the locking pawl. In the case of a person who does not know the direction in which the locking ring should be removed, the locking ring must be moved in various directions, resulting in a disadvantage that it takes time to separate the locking ring.

It is an object of the present invention to provide a buckle for the chin strap of the helmet, which has a simple structure and eliminates such drawbacks and allows easy and quick separation of the receiver and the insert. .

B. Structure of the invention (1) Means for solving the problems And in order to achieve the above object, according to the invention, the chin strap is tied to the tip of the chin strap that extends downward from one side of the cap body. It consists of an insert and a receiver suspended on the other side of the cap body, a locking ring is formed at the tip of the insert, and the receiver has a locking ring that can engage with the locking ring. A locking pawl is fixedly installed, and the locking ring is moved between a locking position where the locking ring is restrained in an engagement position with the locking pawl and an unlocking position where the locking ring is allowed to separate from the locking pawl. A buckle for a helmet chinstrap, in which a locking member to be obtained is slidably fitted and a locking spring is connected to the locking member for biasing the locking member in the direction of the locking position. When the insert is in the engagement position with the pawl, it is pressed against the locking ring so as to urge it in the direction of separation from the locking pawl, and when the insert is separated from the receiver, the lock member is in contact with the lock. A fixed end of a leaf spring is fixed to the receiver, the free end of which is integrally formed with an elastic piece that clamps the locking member between the lock member and the inner surface of the receiver when in position;
The resilient piece has an arcuate cross section that is convex in the direction of engagement with the locking ring.

(2) Action To separate the buckle, the locking member is moved to the unlocked position against the force of the locking spring. According to this movement, the locking member releases the restraint of the locking ring, so that the locking ring is automatically pushed out from the engagement position with the locking pawl to the disengaging position by the resilient force of the resilient piece.

In addition, when the locking member is in the locked position with the insert separated from the receiver, the resilient piece clamps the locking member between the inner surface of the receiver and the vibration and rattling of the locking member are effectively prevented. can be suppressed. Moreover, when the locking ring is pushed into the engagement position with the locking pawl from this state, the tip of the locking ring smoothly slides on the convex curved surface of the elastic piece, so that the locking ring is pushed into the engagement position with the locking pawl. Movement to the desired position is carried out effortlessly.

(3) Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. In FIG. A short attachment string 4 is fixed to the left side wall of the cap body H with a rivet 2', and a buckle B is formed in cooperation with the insert 3. The receiver 5 is tied together. Then,
When using the helmet, the insert 3 is inserted into the support 5 and the chin strap 1 is attached to the user's chin.

The structure of the buckle B will be explained with reference to Figs. 1 and 3 to 6. Figs. 1 and 3 show the buckle B in a combined state, and Figs. 4 and 5 show it in a separated state. It is something.

The insert 3 is made of a metal plate, and has a catch 6 at one end on the chin strap 1 side and a locking ring 7 at the other end.

The receiver 5 has a metal receiver main body 8 that is directly tied to the attachment string 4, and the locking ring 7 is provided on the surface of the receiver main body 8.
A pair of guide rails 9, 9 that allow insertion of the guide rails 9, 9, and a locking pawl 11 located between the guide rails 9, 9 near the entrance 10 thereof are protrudingly provided. Locking claw 11
can be engaged with the hole in the locking ring 7, and the back surface 12 of the locking pawl 11 is inclined to guide the engagement.

A locking member 13 made of synthetic resin is slidably connected to the guide rails 9, 9 so as to be movable between a locked position L and an unlocked position U, and a locking member 13 is provided between the locking member 13 and the receiver main body 8. The spring 14 is compressed. This locking member 13 has a locked position L close to the locking pawl 11 and an unlocked position U separated from it.
The lock spring 14 always springs the lock in the direction of the lock position L by the force of the lock spring 14.

The lock member 13 has a locking pawl 1 at the lock position L.
1 and facing the entrance 10
and photo 13 protruding from between both guide rails 9 and 9.
b are integrally formed, and the end surface 15 of the restraint piece 13a facing the entrance 10 is formed into a slope symmetrical to the back surface 15 of the locking claw 11.

A cover 16 made of synthetic resin that covers the guide rails 9, 9 is fitted leaving the entrance 10, and a bottom plate 17 made of synthetic resin that covers the back side of the support body 8 is fitted to the cover 16. Bonded by welding or the like.
The cover 16 is provided with a window 18 through which the cutout 13b of the locking member 13 passes, and when the cutout 13b comes into contact with the edge of the window 18, the locking member 13
A locked position L and an unlocked position U are defined.

A recess 19 is formed on the inner surface of the bottom plate 17 so as to face the locking pawl 11, and a leaf spring 20 is attached to the recess 19. The leaf spring 20 has an elastic piece 20a integrated into the free end, which can position the free end immediately in front of the locking pawl 11 in a free state and hold the base of the restraining piece 13a of the locking member 13 between the inner surface of the cover 16. The fixed end thereof is fixed to the recess 19. The resilient piece 20a has a cross section formed in an arc shape convex in the direction of engagement with the locking pawl 11, thereby moving the locking ring 7 to the engagement position with the locking pawl 11. When pushing in, the tip of the locking ring 7 smoothly slides on the convex curved surface of the elastic piece 20a, so that the locking ring 7 can be smoothly moved to the above-mentioned engagement position.

Next, the operation of this embodiment will be explained. In FIG. 4, when the locking ring 7 of the insert 3 is pushed into the entrance 10 of the receiver 5 to bring the buckle B into the connected state, the tip of the locking ring 7 presses against the inclined end surface 15 of the restraint piece 13a. The locking member 13 is moved back against the force of the locking spring 14. Then, the locking ring 7 is attached to the restraining piece 13a.
is guided by the inclined end surface 15 of the spring, and enters the engagement position with the locking pawl 11 while pushing away the resilient piece 20a.

When the locking ring 7 engages with the locking pawl 11, the locking member 13 moves forward to the locking position L due to the elastic force of the locking spring 14, as shown in FIG.
3a is engaged with the outer surface of the locking ring 7, and the locking ring 7 is restrained in the engagement position with the locking claw 11. In this way, the bonded state of the buckle B is obtained.

To make this buckle B into a separated state, take 13
b causes the locking member 13 to retreat to the unlocked position U against the force of the locking spring 14. According to this retraction, the restraint piece 13a releases the restraint of the locking ring 7, so that the locking ring 7 is automatically moved from the engagement position with the locking pawl 11 to the disengaged position by the elastic force of the resilient piece 20a. is pushed out. In this way, the detached state of the buckle B is obtained.

C. Effects of the invention As described above, according to the invention, there is an insert that is tied to the tip of the chin strap that extends downward from one side of the cap body, and an insert that is suspended from the other side of the cap body. It becomes more like a receiver,
A locking ring is formed at the tip of the insert, and a locking claw capable of engaging with the locking ring is fixedly provided on the receiver, and
A locking member is slidably movable between a locking position where the locking ring is held in an engagement position with the locking pawl and an unlocked position where the locking ring is allowed to separate from the locking pawl. In a helmet chinstrap buckle which is fitted into the buckle and has a locking spring connected to the locking member for biasing it in the direction of the locking position, the locking ring occupies the engagement position with the locking pawl. At times, the locking ring is pressed against the locking ring so as to urge it in the direction of detachment from the locking pawl, and when the locking member is in the locking position with the insert separated from the receiver, the locking member The fixed end of the leaf spring, which has a free end integrally formed with an elastic piece for holding the buckle between the buckle and the inner surface of the buckle, is fixed to the buckle. Accordingly, the locking ring can be automatically disengaged from the locking pawl by the force of the explosive fragment, and the separation operation can therefore be performed easily and quickly, improving the ease of putting on and taking off the helmet. . Moreover, there is no need to provide a special mechanical interlocking mechanism between the locking member and the locking ring for the above-mentioned release, and it is sufficient to simply add one leaf spring, which contributes to a simple structure and cost reduction. It is possible.

In addition, since the elastic piece clamps the lock member between the lock member and the inner surface of the receiver when the buckle is separated and the lock member is in the lock position, it is possible to effectively suppress vibration and rattling of the lock member. can. Moreover, since the resilient piece serves both as a member for suppressing the vibrations, etc., and as a biasing member for the locking ring as described above, the structure is simplified accordingly.

Further, since the elastic piece has a cross section formed in a convex arc shape in the direction of engagement with the locking ring, when pushing the locking ring into the engagement position with the locking pawl, the elastic piece is The tip of the ring can smoothly slide into contact with the convex curved surface of the resilient piece, thereby allowing the locking ring to move to the engagement position without difficulty.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal side view of the buckle in a coupled state; FIG. 2 is a rear view of a helmet equipped with the buckle of FIG. 1;
Figure 3 is a sectional view taken along the - line in Figure 1, Figure 4 is a longitudinal sectional side view of the buckle in its separated state, Figure 5 is a perspective view of the buckle in its separated state, and Figure 6 is a plate with elastic pieces. It is a top view of a spring. B... Buckle, H... Hat body, L... Lock position, U... Unlocked position, 1... Chin strap, 3... Insert, 5... Receiver, 7... Locking ring, 8... Receiver body, 11... Locking claw, 13... Lock member, 13
a...Restriction piece, 13b...Photography, 14...Lock spring, 20...Leaf spring, 20a...Ejection piece.

Claims (1)

[Scope of utility model registration request] It consists of an insert that is tied to the tip of the chin strap that extends downward from one side of the cap body, and a holder that is suspended from the other side of the cap body. A locking ring is formed, and the receiver has a locking pawl that can engage with the locking ring, and a locking position that restrains the locking ring in a position where it engages with the locking pawl. A locking member movable between an unlocked position and an unlocked position that allows the locking ring to disengage from the locking pawl is slidably fitted, and the locking member is biased toward the locking position. In a helmet chin strap buckle to which a lock spring is connected, when the locking ring is in the engagement position with the locking pawl, the locking ring is biased in the direction of detachment from the locking pawl. A resilient piece is integrally formed at the free end to press the insertion tool and to sandwich the lock member between the inner surface of the receiver and the receiver when the lock member is in the locked position with the insert separated from the receiver. The fixed end of the leaf spring is fixed to the receiver,
A buckle for a chin strap of a helmet, wherein the elastic piece has a cross section formed in a convex arc shape in a direction of engagement with the locking ring.