JP3204590B2 - buckle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a buckle for connecting a seat belt provided on a seat such as a stroller for sitting an infant.

[0002]

2. Description of the Related Art Conventionally, for example, in a stroller or the like, a seat belt is attached to secure the safety of a seated infant. In a conventional basic seat belt, two left and right belts wound around the torso of an infant are connected via a buckle at the center.

[0003] However, there is a case in which an infant may twist his body or try to get up while sitting, so that sufficient safety cannot be ensured with only two seat belts. For this reason, a T-shaped seat belt has been newly developed in which a crotch belt extending upward from a seating surface between both feet of the infant is attached in addition to two seat belts surrounding the trunk. And, as a buckle for fastening such a T-shaped seat belt, two fitting bodies attached to the tip of two trunk belts and a crotch belt are received and the two fitting bodies are received and mutually engaged. A buckle consisting of a main body connected to the buckle is being developed simultaneously. The buckle of such structures are, for example are shown like in real fair 5-2094 JP or actual fair 5-1492 5 JP. This buckle is composed of three parts, the buckle body and the two fitting bodies, as described above. The buckle body is provided with a lock mechanism that engages with and locks the tip portions of the two fitting members attached to the trunk belt. The lock mechanism mainly uses an engagement piece urged by a spring. And when the front-end | tip part of two fitting bodies is fitted in the buckle main body, an engagement piece engages with this and prevents that two fitting bodies separate. Then, the engagement state is maintained by the spring being biased by the spring in the direction in which the engagement piece always maintains the engagement. Also, when releasing the connection of the buckle, when a person presses a part of the engaging piece with a fingertip, the engaging piece moves in the direction of releasing the engagement against the urging force of the spring. .

[0004] By such an operation, the two trunk belts and the crotch belt are separated from the buckle body almost simultaneously.

[0005]

However, the buckle used for the conventional T-shaped seat belt uses a plurality of engagement pieces, springs, and the like for its lock mechanism, and generally has a complicated structure. For this reason, there were disadvantages that the number of parts was increased and the manufacturing cost was relatively high.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a buckle which has a small number of parts and can easily connect or disconnect the buckle.

[0007]

SUMMARY OF THE INVENTION The present invention provides a pair of left and right torso belts extending along the trunk of a occupant sitting on a seat, and a pair of insertion members attached to the front end of the occupant. And a buckle attached to a tip end of a crotch belt extending upward between the buckle, and connecting the trunk belt and the crotch belt by inserting an insertion member into the buckle body. The buckle body has an opening formed at both end surfaces of the hollow body for receiving insertion members, an opening window formed at the front center of the hollow body, and a buckle body inserted so as to prevent detachment of the insertion member. And a locking portion for locking the member.
Further, the insertion member has a belt attachment portion for attaching the trunk belt, and an elastic engagement portion inserted or withdrawn from the opening of the buckle body. Further, the elastic engaging portion is formed at a position on the elastic plate-like portion extending from the end face of the belt attaching portion and capable of elastic deformation, and at a position on the elastic plate-like portion facing the opening window of the buckle body when the buckle is connected. And a pressing portion that is pressed when the buckle is released. Further, the elastic engaging portion engages with the locking portion of the buckle main body when the buckle is connected to prevent the insertion member from being detached, and when the buckle is released, the pressing portion is pressed and the elastic plate-shaped portion is elastically deformed. By doing so, the buckle body has an engagement portion that is released from engagement with the engagement portion.

Further, in the present invention, the pair of insertion members are configured such that when the buckles are connected, the pressing portions of the resilient engagement portions are exposed close to the opening window of the buckle body. .

In one embodiment according to the present invention, a loop portion for inserting a buckle main body is provided at the tip of the crotch belt, and a mounting member provided on the back surface of the buckle main body and the inside of the loop portion are provided. The buckle body and the loop portion of the crotch belt are detachably attached by the attachment member provided in the buckle.

[0010]

The buckle of the present invention is connected by inserting the elastic locking portions of the pair of insertion members from the openings at both end surfaces of the buckle body. At this time, the engagement of the elastic engagement portion of the insertion member with the locking portion of the buckle main body prevents the insertion member from detaching from the buckle main body.

At the time of the buckle detaching operation, a person presses the pressing portion of the insertion member exposed in the opening window of the buckle body with a fingertip. Then, the elastic plate-shaped portion of the elastic engaging portion is elastically deformed in the pressing direction with the end surface of the belt attaching portion as a starting point. As a result, the engaging portion formed on the elastic engaging portion moves, and the engagement with the engaging portion of the buckle body is released. Thereby, the engagement between the buckle body and the insertion member is released, and the insertion member is detached.

Further, since the pressing portion of a pair of plug member is configured so as to be exposed to the proximity position in the opening window of the buckle, the person presses the pressing section of the two plug members at once fingertips It is Ru can. Therefore, the two insertion members can be simultaneously detached by one pressing operation of the fingertip.

[0013]

FIG. 6 shows the structure of a stroller provided with a seat belt to which a buckle is applied according to an embodiment of the present invention. The seat belt has a pair of left and right first and second trunk belts 1 and 2 extending around the torso of the seated infant, one end of which is connected to a seating surface, and the other end of which passes between the feet of the infant from the seating surface. And a crotch belt 3 extending upward. A buckle 4 is attached to the center where the trunk belts 1, 2 and the crotch belt 3 intersect.

FIG. 1 is a perspective view showing the structure of the buckle 4 of the embodiment. As shown in FIG. 1, the buckle 4 is composed of a pair of left and right insertion members 50, 50 (only one is shown) and one buckle main body 10. Each of the insertion member 50 and the buckle main body is preferably formed by integrally molding a resin material such as a polyacetal resin.

The insertion member 50 is roughly divided into a belt attachment portion 51 and an insertion portion 52. The belt attachment portion 51 has a flat plate shape with three slits 53 formed therein, and the tip ends of the trunk belts 1 and 2 are inserted and fixed inside the slits 53.

The insertion portion 52 has a pair of guide members 54, 54 extending from the end face of the belt attaching portion 51, and an engaging member 55 extending between the pair of guide members 54, 54. The guide members 54, 54 serve as a guide when the insertion member 52 is inserted into the buckle main body 10 described later. In this embodiment, the guide members 54 have a substantially T-shaped cross section in order to secure a predetermined bending rigidity. It is configured.

The engaging member 55 has a function of engaging and locking the insertion member 50 and the buckle main body 10, and is composed of an elastic plate 56, an operating portion 57, and an engaging portion 58. . The base of the elastic plate 56 is integrally fixed to the end surface of the belt attaching portion 51,
It has a thin plate shape with an operation section 57 formed at its tip. The operation unit 57 is located at the tip of the elastic plate 56, and when the buckle is released, the operation unit 57 is operated with a fingertip by a person.
Is pushed down. The engagement portion 58 has a shape projecting on both sides of the operation portion 57, and has a rear edge 5 of the engagement portion 58.
8a and 58a abut on a locking projection of the buckle body 10 described later, thereby preventing the insertion member 50 from being detached.

Here, the elastic deformation operation of the locking member 55 will be described. The elastic plate 56 is made of a thin resin material and is easily elastically deformed and bent by an operation of pushing down a fingertip of a person. Therefore, when a person presses down the operation unit 57, the elastic plate 56 bends downward from the base of the end surface of the belt attachment unit 51, and at the same time, the engagement unit 58 moves downward. This operation will be described again in the buckle release operation described later.

The buckle body 10 is formed in a hollow box shape having a substantially rectangular cross-sectional view, and has openings 18 for inserting the insertion member 50 at both end surfaces. In addition, an opening window 11 is formed in the front of the central portion. Cutting line AA and cutting line B- in FIG.
FIG. 2 shows the shape of the opening 18 as viewed from the direction along
(A) and (b) show. As shown in FIGS. 2A and 2B, the inside of the buckle main body 10 is
The guide member insertion spaces 12 and 12 into which the pair of guide members 54 and 54 are inserted, and the engagement member insertion space 13 into which the engagement member 55 is inserted are formed. Guide member insertion space 1
2 is closed by a wall surface 12a. A buckle cylinder 14 located substantially at the boundary between the two spaces 12 and 13
Lock projections 15 are formed on the inner surface of the upper part. The locking protrusion 15 extends from the end face of the opening of the buckle body 10 toward the edge of the opening window 11, and has a leading end formed to have a length in contact with the rear edge 58 a of the engaging portion 58 of the insertion member 50. ing.

A hook engaging portion 16 for attaching the buckle body 10 to the crotch belt is formed at the center of the back surface of the buckle body. The tip of the crotch belt is formed in a loop shape. By connecting a hook formed as an attachment member on the inner surface of the loop portion and a hook engagement portion 16 as an attachment member of the buckle body 10,
The buckle body 10 is detachably attached inside the tip loop portion of the crotch belt.

Next, FIGS. 3 and 4 show a state in which the insertion member 50 and the buckle main body 10 are connected. In addition,
FIG. 4 shows a cross-sectional structure from a direction along a cutting line CC in FIG. Insertion member 50 is buckle body 1
0, the insertion member 50 is inserted.
Hold the original state in which the engaging member 55 is not elastically deformed. In this state, the operating portion 57 of the engaging member and the engaging portion 5
Reference numeral 8 shows the inside of the opening window 11 of the buckle body 10 to the outside. Further, the rear edge 58 of the engaging portion 58 of the engaging member
Reference numerals a and 58a are located at positions in contact with the front end face of the locking projection 15 of the buckle body 10 in the cross-sectional height direction in FIG. For this reason, even if the insertion member 50 is pulled in the direction in which the
8 and the locking projection 15 abut against each other,
Prevent it from leaving. Also, a pair of insertion members 5
The operation portions 57 and 57 of the respective 0 and 50 are aligned within the opening window 11 with a slight gap therebetween. With such a shape, the vicinity of the boundary between the two operation units 57, 57 is pressed with a fingertip, so that the two insertion members 5
The engagement of 0 and 50 can be simultaneously released.

Next, the detaching operation of the buckle having the above structure will be described with reference to FIG. FIG.
FIG. 5A shows an initial state when the detaching operation is performed on the buckle in the connected state, and FIG. 5B shows a state in which the detachment is further advanced.

First, referring to FIG. 5 (a), a person inserts a pair of insertion members 50, 5 from above the cloth of crotch belt 3 with a fingertip.
The vicinity of the boundary between the 0 operation units 57, 57 is pushed down in the figure. In this case, the belt attaching portion 5 of the insertion member 50
1 and the guide member 54, the guide member 54 and the buckle body 1
The horizontal state is maintained by the fitting relationship with the guide member insertion space 12 (see FIG. 2). However, the elastic plate 5
6 is elastically deformed downward around the end surface base A of the belt attaching portion 51 when the operating portion 57 at the tip thereof receives a downward pressing force. As a result, the engaging portion 58 of the engaging member moves downward, and as a result, the rear edge 5 of the engaging portion 58
The position of 8a moves below the position of the locking projection 15 of the buckle body 10, and the engagement between them is released. The bending of the distal end portion of the elastic plate 56 causes the operation portion 5
The tip of 7 receives a horizontal component force of the pressing force from the fingertip of the person, and the insertion members 50, 50 try to move in a direction to separate from the buckle main body 10, respectively.

Further, referring to FIG. 5 (b), when the fingertip is further pressed down, the fingertip fits between the operation parts 57, 57 which are separated from each other. Thereby, the component force for separating the pair of insertion members 50, 50 in the horizontal direction is further increased, and the two members can be easily moved. The guide members 54, 54 and the buckle body 1
0, and the insertion members 50, 50 are separated by the elastic restoring force of the elastic plate 56 with the rear edges of the belt attachment portions 51, 51 lifted up as shown in the figure. Is performed. When the tips of the guide members 54 approach the end face of the opening of the buckle main body 10, the insertion members 50, 50 are easily separated from the buckle main body 10.

As described above, the buckle according to the present embodiment is
Operation unit 5 exposed in opening window 11 of buckle body 10
By simultaneously pressing down the members 7 and 57, the pair of insertion members 50 and 50 can be simultaneously detached from the buckle main body 10.

In the above embodiment, the locking projection 15 provided on the buckle main body and the engaging member 55 provided on the engaging member 55 of the insertion member 50 serve as a structure for locking the insertion member 50 and the buckle main body 10. Although the configuration in which the portion 58 abuts has been described, it is not particularly limited to such a configuration. For example, a convex portion or a concave portion is provided on the inner surface side of the buckle main body 10, and the concave portion or the convex portion is provided at a position of the corresponding engaging member 55 of the insertion member 50, and both the convex portion and the concave portion are provided in a state where the buckle is connected. May be used. In this case, if the elastic plate 56 is elastically deformed by pressing down the operation portion 57 so that the engagement between the two concave portions and the convex portions is released, the same function as in the above embodiment is achieved.

[0027]

As described above, in the buckle according to the present invention, the engaging and disengaging operations of the engaging portion provided on the buckle main body side and the engaging portion provided on the elastic engaging member of the insertion member are elastically engaged. It is configured to perform the operation depending on the presence or absence of elastic deformation of the member. Thus, for example, elements that perform a mechanical operation such as a spring and an engagement piece are eliminated, and a simple structure with a small number of components can be realized. For example, a buckle can be composed of three parts, which is the minimum number of parts.

Further, since the pressing portions of the pair of insertion members are arranged close to each other in the opening window of the buckle main body, the two insertion members can be simultaneously detached by a fingertip of a person. This facilitates the operation of detaching the buckle.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the structure of a buckle according to an embodiment of the present invention.

2A is a cross-sectional structural view taken along a cutting line AA in FIG. 1, and FIG. 2B is a cross-sectional structural view taken along a cutting line B- in FIG.

FIG. 3 is a front structural view showing a connected state of the buckle shown in FIG. 1;

FIG. 4 is a sectional structural view taken along a cutting line CC in FIG. 3;

FIG. 5 is a sectional structural view showing an initial state (a) and an end state (b) of the buckle detaching operation according to the embodiment.

FIG. 6 is a structural perspective view of a stroller to which the buckle of the embodiment is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Buckle 10 ... Buckle main body 11 ... Opening window 15 ... Locking projection 18 ... Opening 50 ... Insertion member 51 ... Belt mounting part 52 ... Insertion part 54 ... Guide member 55 ... Engagement member 56 ... Elastic plate 57 ... Operation Part 58 ... engaging part

Claims (2)

(57) [Claims] 1. A pair of insertion members attached to the tips of a pair of left and right trunk belts extending along the torso of a seated person sitting on a seat, and a crotch belt extending upward from the seat surface to between the legs of the seated person. A buckle body attached to the tip of the buckle, the buckle body to lock the trunk belt and the crotch belt by inserting the insertion member into the buckle body, the buckle body, An opening formed at both end surfaces of the hollow body for receiving the insertion member, an opening window formed at the front center of the hollow body, and the insertion member so as to prevent detachment of the insertion member. A locking portion for locking, wherein the insertion member is a belt mounting portion for mounting the torso belt, and inserted or removed from the opening of the buckle body. The elastic engaging portion further includes an elastic plate portion that is elastically deformable and extends from an end surface of the belt attaching portion, and the buckle main body when the buckle is connected. A pressing portion formed at a position on the elastic plate-shaped portion facing the opening window and pressed at the time of the detaching operation of the buckle, and engaging with the locking portion of the buckle main body at the time of coupling the buckle. The disengagement of the insertion member is prohibited, and the engagement of the buckle with the locking portion of the main body of the buckle is released by the pressing portion being pressed and the elastic plate-shaped portion being elastically deformed when the buckle is released. and a coupling portion possess, the pair of insertion members, at the time of connection of the buckle,
The pressing portions of the elastic engaging portions are buckle main body.
Is configured to be exposed in the vicinity of the opening window.
As a result, the pressing portions of the pair of insertion members are the same.
At the same time, the pair of insertion members
And wherein the Rukoto can be detached at the time, buckle. 2. A loop portion for inserting the buckle body is provided at a tip end of the crotch belt, and a mounting member provided on a back surface of the buckle body and a mounting member provided on the inside of the loop portion, The buckle according to claim 1, wherein the buckle body and the loop portion of the crotch belt are detachably attached.