JPH0889314A - Connection device for three-point type seat belt - Google Patents

Abstract

PURPOSE: To easily perform belt connecting/releasing action especially in a connection device for a three-point type seat belt to be used in a baby carriage, for example. CONSTITUTION: A lock member 90 is provided with a pair of a right and a left lock members 92, 92 to lock insertion parts 60 of respective male members 30 inserted from a right and a left insertion ports 81, 81 respectively in the insertion ports 81, 81, a pushbutton 91 positioned in the middle of both lock members 92 and protruded outward from a female main body 80 to release a lock condition by pushing operation into the female main body 80, and a pair of a right and a left resilient leg members 93, 93 to energize the pushbutton 91 in such a direction as to protrude it from the female main body 80. The right and the left lock members 92, the pushbutton 91, and the right and the left resilient leg members 93 are integrally moulded of resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-point seat belt connecting device used in, for example, a stroller, and more particularly to a device for easily connecting and disconnecting the belt.

[0002]

2. Description of the Related Art Conventionally, a so-called buckle has been used as a connecting device for a three-point seat belt of this type, and this buckle is a pair of left and right male belts fixed to the free ends of a pair of left and right shoulder belts. The member and the left and right male members are connected to each other, and the female member is fixed to the free end of one crotch belt (for example, JP-A-61-37).
107, Japanese Utility Model Publication No. 61-147012).

Each of the above-mentioned conventional male members has a belt fixing portion through which the free ends of the left and right shoulder belts pass, and an inserting portion extending from the belt fixing portion and inserted into the female member.
Further, a conventional female member is a hollow cylindrical shape having a belt fixing portion through which a free end portion of a crotch belt is passed, and a pair of left and right insertion ports connected to the belt fixing portion and into which insertion portions of respective male members are inserted. And a lock member that is located in the hollow cylinder of the female body and that locks the respective insertion portions of the left and right male members that are respectively inserted from the pair of left and right insertion openings into the respective insertion openings. Was equipped with.

The above-mentioned conventional locking member is disclosed in Japanese Patent Laid-Open No. 61-3
In the one described in Japanese Patent No. 7107, two lock plates that lock the insertion portions of the male members inserted from the insertion openings into the insertion openings and the lock state of both lock plates are released. It is provided with one push button and a coil spring for projecting the push button, and is roughly composed of four parts.

Further, the conventional locking member, which is described in Japanese Utility Model Laid-Open No. 61-147012, locks the insertion portions of the male members inserted from the respective insertion openings into the insertion openings. It was provided with two leaf springs and a total of two push buttons capable of individually releasing the respective locked states by pushing each leaf spring, and when roughly classified, it was composed of a total of four parts.

Since each of the leaf springs has one end fixed and a push button fixed to the free end of the other end, the push button follows an arcuate locus around the one end where the leaf spring is fixed. Was moving.

[0007]

However, in the above-mentioned conventional two-belt connecting device, each lock member is composed of four parts, so that the structure is complicated and the assembly is troublesome. There was a problem. Further, the push button described in Japanese Utility Model Laid-Open No. 61-147012 moves along an arcuate locus around one end where the leaf spring is fixed. Therefore, when the push button is pushed, the push button is pushed in the direction. There was a second problem that it was tilted with respect to it, it could not be pushed straight in, and the operation feeling was poor.

Therefore, the invention according to claim 1 is proposed in view of the first problem of the above-mentioned conventional technique, and the purpose thereof is to reduce the number of parts and to facilitate the assembly. An object of the present invention is to provide a connecting device for a point type seat belt. In addition to this, the invention according to claim 1 has been proposed in view of the first problem of the above-mentioned conventional technique, and its object is to enable the push button of the female member to be pushed straight. The present invention is intended to provide a three-point type seat belt connecting device.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the object of the invention described above, by forming a total of four elastic leg pieces, twisting and twisting of the lock member in the hollow cylinder of the female member can be prevented.

[0010]

The present invention is to achieve the above-mentioned object, and the contents thereof will be described below with reference to the embodiments shown in the drawings. According to the first aspect of the present invention, the lock member (90) is inserted through the left and right insertion ports (81, 81) into the insertion portions (60) of the male members (30) and the insertion ports (60). 8
1) A pair of left and right locking pieces (92, 92) that lock inside
And a push button (91) that is located in the middle of both locking pieces (92) and protrudes outward from the female body (80) and can release the locked state by a pushing operation into the female body (80). ) And the left and right ends of the push button (91) respectively extend in parallel with the left and right locking pieces (92), and a pair of left and right that urges the push button (91) in a direction projecting from the female body (80). The elastic leg pieces (93, 93) are provided, and the left and right locking pieces (92), the push button (91), and the left and right elastic leg pieces (93) are integrally molded with resin.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the configuration of the invention described above, the elastic leg pieces (93) are respectively positioned on both sides of the left and right locking pieces (92, 92), and a total of four elastic leg pieces (93) are formed.

[0012]

Therefore, according to the first aspect of the invention, the lock member (90) may be mounted in the hollow cylinder of the female body (80). Next, in order to connect each male member (30) and the female member (40), the insertion portion (60) of each male member (30) is connected to each insertion port (81) of the female body (80). You just have to insert it in each.

When each insertion portion (60) is inserted, it engages with one locking piece (92) of the lock member (90) in the hollow cylinder of the female body (80), and the locking piece (92). ), The insertion part (60) of each male member (30) is locked in each insertion port (81) of the female body (80). On the other hand, in order to release the connection state between the male member (30) and the female member (40), the push button (91) of the lock member (90) may be pushed into the female body (80).

At this time, the push button (91) has the left and right elastic leg pieces (9
It is necessary to push in toward the elastic force of 3). In this way, when the push button (91) is pushed in, the left and right locking pieces (92) are inserted into the insertion parts (60).
Disengage from. For this reason, the locked state is released, and the respective insertion portions (60) come out of the respective insertion ports (81) of the female body (80).

Further, when the push button (91) is pushed in, since the left and right elastic leg pieces (93) are formed symmetrically, when the push button (91) is pushed straight in the pushing direction and the pushing is stopped. The push button (91) again projects due to the elastic restoring force of the left and right elastic leg pieces (93). According to the invention of claim 2, in addition to the effect of the invention of claim 1 described above, a total of four elastic leg pieces (93) are formed, so that the left and right engaging pieces are of the respective male members (30). When engaging the insertion part (60), pushing the push button (91), or when the elastic leg piece (93) is restored, the lock member (90) is twisted inside the female body (80). You can prevent it from twisting.

[0016]

1 to 9 show one embodiment of the present invention. FIG. 1 is an exploded perspective view of a seat belt connecting device, FIG. 2 is a perspective view of a stroller, and FIG. 3 is a cross-sectional view of the connecting device. FIG. 4, FIG. 4 is a side view of the male member, FIG. 5 is a side view of the female member, FIG. 6 is a plan view of the connecting device, FIG. 7 is a side view of the connecting device, and FIG.
FIG. 8 is a sectional view taken along line VIII-VIII, and FIG. 9 is a perspective view of the lock device.

In the figure, reference numeral 10 denotes a three-point seat belt connecting device 10 according to the present invention. The belt connecting device 10 is used, for example, in a stroller 20 as shown in FIG. As shown in FIG. 2, the stroller 20 is equipped with a seat belt for children (not shown) such as infants and young children. The seat belt is a crotch belt 21 that is passed between the child's legs and a pair of left and right waist belts 2 that are wrapped around the child's waist.
It is composed of 2,22.

As shown in FIG. 1, the belt connecting device 10 is roughly divided into a pair of left and right male members 30 and 30 fixed to respective free ends of a pair of left and right waist belts 22, and left and right male members. The members 30 are connected to each other and are formed of a female member 40 fixed to the free end of one crotch belt 21. Although the seat belt of the stroller 20 is illustrated in the present embodiment, the present invention is not limited to this, and the stroller 20 may be used as a baby seat, a child seat for a car, a baby rack, or the like.

As shown in FIG. 1, each male member 30 is roughly classified into a belt fixing portion through which a free end portion of each waist belt 22 is passed.
50, and an insertion portion 60 extending from the belt fixing portion 50 and inserted into the female member 40. Each male member 30 is integrally formed of a rigid thermoplastic resin such as POM (polyacetal). In addition, as shown in FIG. 1, the female member 40 is roughly classified into a belt fixing portion 70 that allows the free end portion of the crotch belt 21 to pass through and a belt fixing portion 70 that is connected to the male member 30. Hollow cylindrical female body 80 having a pair of left and right insertion ports 81, 81 into which the insertion portion 60 is inserted.
And the respective insertion portions 50 of the left and right male members 30 located in the hollow cylinder of the female main body 80 and respectively inserted through the pair of left and right insertion openings 81 are locked in the respective insertion openings 81. And a lock member 90.

The belt fixing portion 70 and the female body 80 are integrally formed, and integrally formed with a rigid thermoplastic resin such as POM (polyacetal). Further, the lock member 90 includes the belt fixing portion 70 and the female body 80.
Is molded separately from and is integrally molded with a thermoplastic resin such as POM (polyacetal) having appropriate elasticity and rigidity.

First, the belt fixing portion 50 and the inserting portion 60 of each male member 30 will be described. As shown in FIG. 1, the belt fixing portion 50 has a generally square shape and each insertion port of the female body 80.
Between the flange 51, which is one size larger than 81, the pair of left and right side pieces 52, 52 extending from both ends of the flange 51, the connecting piece 53 connecting the end portions of the side pieces 52, and the side piece 52. 2 built
It is composed of first and second bars 54 and 55 of the book.

As shown in FIG. 3, the both side pieces 52 are gently curved downward in an arc shape. The side pieces 52 are curved in this manner so that the belt fixing portion 50 follows the curve of the body of the child (not shown). The second bar 55 adjacent to the connecting piece 53 has a rhombic cross section, as shown in FIG. Then, as shown by the chain double-dashed line in FIG. 3, the waist belt 22 is hung from the lower surface of the connecting piece 53 to above the second bar 55 and further wound around the first bar 54 in the counterclockwise direction. Is pulled out from above the second bar 55 between the waist belt 22 previously passed through and the lower surface of the connecting piece 53, and is fixed to the belt fixing portion 50. At this time, the length of the waist belt 22 can be adjusted by increasing or decreasing the pull-out length of the free end portion of the waist belt 22.

As shown in FIG. 1, the insertion portion 60 has a generally rectangular shape, and a rectangular recess 61 that penetrates vertically is formed in the center thereof. The lock member 90 of the female member 40 is fitted into the recess 61, so that the respective insertion ports 81
I can't get out of it. More specifically, the insertion portion 60 is shown in FIG.
As shown in FIG.
It extends in the direction opposite to 52, and the lateral width of the insertion portion 60 is set to be equal to or smaller than the lateral width of each insertion port 81 of the female body 80. Also, the insertion part
As shown in FIG. 4, a pair of left and right bending pieces 62, 62 extending downward in a U-shaped cross section are formed at both end portions of the 60, and the height of both bending pieces 62 is set to the respective insertion portions of the female body 80. The upper and lower heights of the mouth 81 are set to be almost equal. Therefore, the insertion part 60 can be inserted into each insertion port 81 of the female body 80 without play.

Next, the belt fixing portion 70 of the female member 40, the female main body 80, and the lock member 90 will be described. As shown in FIG. 1, the belt fixing portion 70 includes the belt fixing portion 50 of the male member 30.
It has the same structure as the above, specifically, the whole has a square shape,
A pair of left and right side pieces 71, 71 respectively extending from both side portions of the side surface of the female body 80, a connecting piece 72 connecting the tip portions of both side pieces 71, and two first pieces provided between the side pieces 72. , Second bar 73,7
It consists of 4 and.

As shown in FIG. 5, the both side pieces 72 are gently curved in an arc shape. In this way, each side piece 72 is curved in order to allow the belt fixing portion 70 to follow the curve of the crotch of the child (not shown). The second bar 74 adjacent to the connecting piece 72 has a rhombic cross section, as shown in FIG. Then, the crotch belt 21, as shown by the chain double-dashed line in FIG. 8, is hung from the inner side surface of the connecting piece 72 to above the second bar 74 and further wound around the first bar 73 in the counterclockwise direction. The free end is pulled out from above the second bar 74 between the crotch belt 21 and the lower surface of the connecting piece 72, which are previously passed through, and is fixed to the belt fixing portion 70. At this time, the crotch belt 21
The length of the free end of the crotch belt
21 lengths can be adjusted.

As shown in FIG. 1, the female body 80 has a flat rectangular tube shape crushed in the vertical direction, and left and right insertion ports 81 are opened at both left and right ends thereof. More specifically,
As shown in FIG. 5, the female body 80 is composed of an upper wall 82 and a lower wall 83 that are vertically opposed to each other substantially in parallel, and a pair of left and right side walls 84 and 85 that connect the upper and lower walls 82 and 83. .

As shown in FIG. 1, the upper wall 82 is formed with a substantially oval button hole 86 which vertically penetrates into which the push button 91 of the lock member 90 is fitted. As shown in FIG. 1, the facing distance between the side walls 84 and 85 is wider than that of the insertion portion 60 of the male member 30. Then, the upper and lower walls 82, 83 are opposed to the inner side surface of the side wall 84 on the side where the belt fixing portion 70 protrudes, and a pair of upper and lower guide pieces 8 protruding so as to face each other from above and below.
It forms 7,87. Therefore, each insertion port 81 is formed in a space surrounded by the upper and lower walls 82, 83, the right side wall 84 and the guide pieces 86, 86 on all sides, and has a flat rectangular shape crushed in the vertical direction. Is made.

As shown in FIG. 1, each of the insertion ports 81 has a side wall guide piece 87 on the right side and a facing surface of the guide piece 87 which is tapered upward toward the end. On the other hand, the left and right side surfaces of the insertion portion 60 of each male member 30 are also the same.
As shown in FIG. 4, the taper is widened toward the top. Therefore, if the insertion portion 60 of each male member 30 is turned upside down, it cannot be inserted into each insertion port 81 of the female member 40, preventing insertion in the opposite direction.

The lock member 90, as shown in FIG.
The push button 91 has a shape that is line-symmetrical to the left and right around the push button 91, and more specifically, protrudes upward from the button hole 86 of the female body 80.
And the insertion portions 60 of the male members 30 protruding from the left and right end portions and inserted from the left and right insertion openings 81, respectively.
A pair of left and right locking pieces 92, 92 that lock inside 81,
A total of four elastic leg pieces 93 extending diagonally downward from the left and right ends of the push button 91 in parallel with the left and right locking pieces 92, ...
With.

As shown in FIG. 9, a projection 94 is formed at the tip of each locking piece 92 and projects upward and fits into the recess 61 of the insertion portion 60 of the male member 30. There is.
Each convex portion 94 projects in a right-angled triangular cross section, and its slopes are directed to the left and right insertion ports 81, respectively. And the locking member 90
3, is inserted into one of the left and right insertion ports 81 of the female body 80, the push button 91 is fitted in the button hole 86, and the four elastic leg pieces 93 are attached to the female body. 80 upper and lower walls 8
The push button 91 is elastically contracted by the facing surfaces of the reference numerals 2, 83 and urges the push button 91 in a direction projecting upward from the button hole 86.

Next, the coupling device 10 having the above structure
The usage of is described below. First, each male member 30
To connect the female member 40 and the female member 40, the insertion portion 60 of each male member 30
It suffices to fit each into each of the insertion ports 81 of the female main body 80 and insert it. At this time, since each insertion port 81 of the female member 40 and the insertion portion 60 of each male member 30 are tapered upward as shown in FIG.
Even if you try to insert the insertion part 60 of 30 upside down, the female member 40
It hits the opening edge of the insertion port 81 and cannot be inserted.

When the insertion portion 60 of the male member 30 is properly inserted as described above, the insertion portion 60 contacts the locking piece 92 of the lock member 90. Here, when the insertion portion 60 is strongly pushed, the slope of the convex portion 94 of the lock member 90 is pushed by the lower surface of the insertion portion 60, the elastic leg pieces 93 bend, and the lock member 90 sinks. At this time, the left and right elastic leg pieces 93 are formed symmetrically with respect to the left and right lines at the center of the push button 91 of the lock member 90.
Are sunk substantially parallel to the upper and lower walls 82, 83 of the female body 80.

After that, the recess 61 of the insertion portion 60 is locked by the lock member.
When reaching the position of the convex portion 94 of 90, as shown on the left side in FIG. 3, the elastic leg pieces 93 that have been bent are restored by the elastic force of the resin, and at that time, the concave portion 61 of the insertion portion 60 Lock member 90
It snaps into the convex portion 94 of. Therefore, the insertion portion 60 of the male member 30 does not come off from each insertion port 81 of the female body 80,
The waist belt 22 fixed to the belt fixing portion 50 of the male member 30,
It is connected to the crotch belt 21 fixed to the belt fixing portion 70 of the female member 40.

Thus, the left and right insertion ports 81 of the female body 80,
As shown in FIGS. 6 and 7, by connecting the insertion portions 60 of the left and right male members 30, one crotch belt 21 and the left and right waist belts 22 are connected.
Use the three belts 21 and 22 connected with. On the other hand, in order to remove the belts 21 and 22 in the connected state, the push button 91 of the lock member 90 protruding from the button hole 86 of the female body 80 may be pushed in.

When the push button 91 of the lock member 90 is pushed in, each elastic leg piece 93 bends and the lock member 90 sinks inside the cylinder of the female body 80. At this time, since the push button 91 is located at the center of the left and right elastic leg pieces 93, the left and right elastic leg pieces 93 are bent evenly in the left and right direction, and the push button 91 is almost against the upper and lower walls 82, 83 of the female body 80. Sink in parallel.

Since there are a total of four elastic leg pieces 93, the four elastic leg pieces 93 are evenly bent, and in FIG. 6, the push button 91 sways or twists or twists. Can be prevented. In this way, when the push button 91 is pushed in, the convex portion 94 of the lock member 90 descends and disengages from the concave portion 61 of the insertion portion 60 of the male member 30.

In this state, the insertion portion 60 of the male member 30 is shown in FIG.
As shown on the right side of the drawing, it may be pulled out from each insertion port 81 of the female body 80. In this way, from the left and right insertion ports 81 of the female body 80,
By pulling out the respective insertion portions 60 of the left and right male members 30, the connected state of the three belts 21, 22 of the one crotch belt 21 and the left and right waist belts 22 can be released.

In the embodiment shown in the drawings, the recesses 61 are formed in the insertion portions 60 of the left and right male members 30, and the lock member 90 is formed.
Although the left and right convex portions 94 that fit into the concave portions 61 are formed, the concave and convex portions may be reversed.

[0039]

Since the present invention is constituted as described above, it has the following effects. Claim 1
According to the invention described above, not only the number of parts can be reduced, but also the assembling can be facilitated and the push button of the female member can be pushed straightly. Therefore, a three-point type seat belt coupling device with good operability is provided. be able to.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the effect of the invention described above, twisting or twisting of the lock member in the hollow cylinder of the female member can be prevented by forming a total of four elastic leg pieces.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a seat belt connecting device.

FIG. 2 is a perspective view of a stroller.

FIG. 3 is a sectional view of a coupling device.

FIG. 4 is a side view of the male member.

FIG. 5 is a side view of a female member.

FIG. 6 is a plan view of the coupling device.

FIG. 7 is a side view of the coupling device.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a perspective view of a lock device.

[Explanation of symbols]

 10 Seat belt connection device 20 Stroller 21 Crotch belt 22 Waist belt 30 Male member 40 Female member 50 Belt fixing part 60 Insert part 70 Belt fixing part 80 Female body 81 Insert port 90 Lock member 91 Push button 92 Locking piece 93 Elastic Leg

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Aoshima 1 184 Maioka-cho, Totsuka-ku, Yokohama-shi, Kanagawa 1 Nifco Co., Ltd.

Claims (2)

[Claims] 1. A pair of right and left male members fixed to respective free ends of a pair of left and right waist belts, and left and right male members are connected to each other and fixed to free ends of one crotch belt. Each of the left and right male members includes a belt fixing portion through which a free end portion of each waist belt passes, and an insertion portion that extends from the belt fixing portion and is inserted into the female member. The member includes a belt fixing portion which allows the free end portion of the crotch belt to pass through, and a hollow cylindrical female body which is connected to the belt fixing portion and has a pair of left and right insertion ports into which the insertion portions of the male members are inserted. A lock member that is located in the hollow cylinder of the female body and that locks the insertion portions of the left and right male members that are respectively inserted from the pair of left and right insertion openings into the insertion openings. In the point type seat belt coupling device, the lock members are inserted on the left and right sides. The insertion part of each male member inserted from the mouth is located in the middle of the pair of left and right locking pieces that lock the insertion parts of the respective male members in the respective insertion openings, and projects outward from the female body. At the same time, a push button that can release the locked state by pushing it into the female body,
The left and right locking pieces extend from both left and right ends of the push button in parallel with the left and right locking pieces, and a pair of left and right elastic leg pieces for urging the push button in a direction projecting from the female body are provided. A three-point seatbelt connecting device, characterized in that the left and right elastic leg pieces are integrally formed of resin. 2. A three-point type seat belt connecting device, wherein elastic leg pieces are respectively located on both sides of the left and right locking pieces and a total of four elastic leg pieces are formed.