JP2001277918A - Safety belt length adjustment device of child seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety belt length adjustment device of a child seat capable of improving safety when adjusting the length of the safety belt. SOLUTION: This belt length adjustment device 10 includes the safety belt 20 including an extension belt 25, and a winding part 30 for winding and storing the termination part of the extension belt 25. The winding part 30 has: a lock part 34 for locking a pulling belt 28 arranged on the end side of the extension belt 25 after the extension belt 25 is pulled; a winding-storing part 40 for winding and storing the remaining part of the pulling belt 28; and a pulling part 45 for inserting and pulling the pulling belt 28. A cam lever is arranged in the lock part 34, and a spiral spring for automatically winding the pulling belt 28 pulled out by the pulling part 45 is arranged in the winding-storing part 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the length of a safety belt for a child seat, wherein the length of the belt can be adjusted according to the body shape of a child.

[0002]

2. Description of the Related Art Generally, a car seat for a child (called a child seat) has one end fixed in a seat portion and a buckle at the other end so that the child does not jump out of the child seat while the vehicle is running. A safety belt having a fixed belt attached thereto and a pair of shoulder belts provided so as to pass through a tongue to be hooked on the buckle and to span a shoulder and a waist of a young person is attached.

[0003] However, the body shapes of the young people vary, and if the tension of the safety belt applied to the young people's body is low, there is a problem in safety, and if the tension is too high, the young people feel pain. . For that purpose, it is necessary to tension the safety belt with appropriate tension, and conventionally, after the shoulder belt is tensioned, a hook is separately prepared to maintain the moderate tension of the shoulder belt, and the shoulder belt is fixed with the hook So that the end of the shoulder belt was pulled out and fixed.

[0004]

However, when the shoulder belt is fixed by using a separately prepared hook, the fixing work of the hook is troublesome and difficult, and there is a possibility that the hook is loosened during use. Further, since the hook is stored alone and is not attached to the child seat, there is a possibility that the hook may be lost. In the case of the method of pulling out the end of the shoulder belt, the safety belt 51 attached to the child seat 50 is
As shown in FIG. 10, a shoulder belt 52 is attached to the seat 54 so as to extend from the back of the back 53. Since the end 52a of the shoulder belt 52 protrudes from the front of the seat 54, when the end 52a of the shoulder belt 52 is pulled, the pulled out end 52a of the shoulder belt 52 is left hanging as it is. Had become. For this reason, there is a possibility that the end 52a of the shoulder belt 52 may jump during traveling and collide with a young person. Moreover, it did not give a good impression.

[0005] The present invention solves the above-mentioned problems, and adjusts the length of the belt according to the body shape of a young person, and stores the remaining portion of the adjusted belt to improve safety. It is an object of the present invention to provide a safety belt length adjustment device for a child seat that does not sag by improving the safety belt length.

[0006]

Means for Solving the Problems A safety belt length adjusting device for a child seat according to the present invention is configured as follows in order to solve the above-mentioned problems. That is, a safety belt length adjustment device for a child seat in which a belt is attached so as to be able to stretch to restrain a young person, wherein the belt has a fixed belt fixed to a seat portion and one end thereof is hung on the fixed belt. And a tension belt connected to a take-up portion attached to a front end of the child seat, the tension belt being disposed so as to be able to be worn and restraining a child, and The length is adjusted according to the body shape of the person, and the winding portion is configured to be able to store the remaining portion of the stretched belt whose length has been adjusted.

Also preferably, the winding section winds a pulling section for pulling the belt, a lock section for stopping the pulled belt in a pulled state, and a remaining section of the pulled belt. What is necessary is just to be what has a winding storage part to store.

[0008] Further, it is sufficient if a spring is provided in the winding storage section so that the remaining portion of the belt is wound by the spring.

More preferably, the lock portion has a cam lever having a cam surface, and the cam surface has teeth formed thereon.

[0010]

Since the safety belt length adjusting device for a child seat according to the present invention is configured as described above, if the belt is pulled according to the body shape of the child and the belt is locked in the pulled state, The belt can be stretched appropriately according to the child's body type. Moreover, when the belt is pulled, the belt is pulled out against the bias of the mainspring spring. After locking the belt, release the pulling part and the remaining part of the belt will be automatically retracted to the winding storage part of the winding part. Therefore, the end portion of the belt can be prevented from protruding from the seat portion. Therefore, no trouble occurs due to the end of the belt, and the appearance is good.

[0011] Further, if a cam lever having a cam surface is provided on the lock portion and the tooth portion is formed on the cam surface, the belt is securely locked, and the residual portion of the belt is easily stored after the lock. Can be.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a safety belt length adjusting device (hereinafter referred to as a belt length adjusting device) 10 for a child seat of the present embodiment includes a seat 2 and a back 3.
A safety belt 20 attached to the child seat main body 1 having a safety belt 20 for restraining a young person to a seat, and processing the terminal of the safety belt 20 in a state where the safety belt 20 is adjusted to a predetermined length according to the body shape of the young person. And a winding unit 30.

The safety belt 20 includes a fixed belt 21 having one end fixed to the seat frame 2a and a buckle 22 attached to the other end, covering the crotch of the young person, and a buckle for restraining the young person to the seat. The tension belt 25 is provided with a tongue 24 which can be hooked on the belt 22 and imparts appropriate tension to the child. The tension belt 25 has one end fixed to the seat frame 2a and the waist and shoulder of the child. And a traction belt 2 connected to the other end of the pair of shoulder belts 26 behind the back via a connecting plate 27 at one end.
8 and the tension belt 25 connected to the fixed belt 21 is pulled by one end of the pulling belt 28 so that the belt length of the tension belt 25 can be adjusted.

The traction belt 28 is inserted into the seat 2 and is housed in a winding unit 30 arranged at the front end of the seat 2, and the spare belt previously stored in the winding unit 30 is stretched in advance. The length of the belt 25 is adjusted to include the length adjustment. In order to adjust the length, the traction belt 28 is inserted through the winding unit 30, temporarily out of the seat 2 and inserted into the traction member 46, and the traction belt 28 having the traction member 46 inserted is It is stored again in the winding unit 30.

As shown in FIGS. 3 to 5, the winding section 30
It has a lock section 34, a winding storage section 40, and a pulling section 45. The lock portion 34 and the winding storage portion 40 are disposed so as to face up and down with a front end portion of the seat portion 2 sandwiching a guide plate 31 as a travel guide of the traction belt 28, and the lock portion 34 has a cam lever 36. Then, it is arranged above the guide plate 31 and the winding storage section 40 is arranged below. Outside the outlet of the belt passage 32 through which the traction belt 28 is inserted, the traction belt 45 and the traction member 46 through which the traction belt 28 is inserted form the traction portion 45.
Is configured.

The lock portion 34 is rotatably supported via a cam lever shaft 35 on a support plate 33 having a U-shaped cross section supported on the guide plate 31.
6 is provided. The cam lever 36 is the guide plate 31
The tension belt 25 is pressed by pushing the traction belt 28 running on
And a lever portion 38 which is arranged on the rear side of the cam portion 37 and which is operated to press or release the press against the traction belt 28.

The cam portion 37 has a cam surface 37 such that the radius from the center of rotation gradually increases toward the side opposite to the lever portion.
a is formed, and a tooth portion is formed on the cam surface 37a for locking the pulled traction belt 28 in the returning direction. Further, the guide plate 31 is attached to the cam lever 36.
A coil spring 39, one end of which is hooked to the lever portion 38 of the cam lever 36 and the other end of which is urged in the rotational direction, is attached so as to constantly press the cam surface 37a of the cam lever 36 toward the traction belt 28. ing. Therefore, when the lever portion 38 of the cam lever 36 is rotated clockwise in FIG. 3 (the portion indicated by the two-dot chain line in FIG. 3), the coil spring 39
Urges the cam lever 36 in the counterclockwise direction. When the cam lever 36 is rotated counterclockwise by the urging force of the coil spring 39, the cam surface 37a
Since the traction belt 28 is pressed in the direction of biting into the belt 8, the traction belt 28 does not return to the shoulder belt 26 side.

The winding storage section 40 includes a storage case 41 for winding and storing the traction belt 28, a shaft section 42 for holding the leading end of the traction belt 28 and winding the traction belt 28, and a storage case 41. A mainspring spring 43 disposed on the side and connected to the shaft 42 to bias the traction belt 28 toward the winding side.
And

The storage case 41 is formed to have a capacity capable of securing a space for storing the spare belt of the traction belt 28 and the length adjustment of the tension belt 25.
In use, as shown in FIG.
The adjusted length is all stored in the winding unit 30 as the remaining amount.

As shown in FIG. 5, the towing member 46 is formed of a rectangular frame and has an insertion portion 47 through which the towing belt 28 is inserted and an operation portion 48 to be pulled by hand. The support portion 47a of the insertion portion 47 through which the wire 28 is inserted and slides
Are formed in an arc shape to facilitate sliding. Also,
The support portion 47a is brought into contact with the front end of the support plate 33 in a state where the support portion 47a is pulled by the mainspring spring 43 and moved to the retracted position so as not to enter the passage from the outlet of the belt passage 32 of the winding portion 30. Also serves as a stopper.

Accordingly, in a state where the remaining amount of the traction belt 28 is completely wound around the storage case 41, the traction member 46 is pulled together with the traction belt 28 and comes into contact with the support plate 33 (FIG. 1 or FIG. 1). (See FIG. 5).

Next, the operation of the belt length adjusting device 10 configured as described above will be described with reference to FIGS.

FIG. 6 shows a child seat body 1 for a child.
FIG. 3 shows the winding section 30 in a state where the tension belt 25 is hung on the fixed belt 21, and the tension belt 25 does not apply the tension to the child around the back portion 3. It is in the state of being loosened. Therefore, the winding unit 30
The remaining portion of the tension belt 25 is not stored in the take-up storage section 40. However, the winding storage section 40 of the winding section 30
Since the traction belt 28 is previously wound by a predetermined amount, the mainspring spring 43 is in a state of urging the traction belt 28 in the winding direction.

Next, in order to apply tension to the tension belt 25 in accordance with the body shape of the child, the traction belt 28 is pulled by the traction member 46 by hand. First, as shown in FIG. 7, the lever portion 38 of the cam lever 36 of the lock portion 34 is pushed downward (clockwise in FIG.
The cam surface 37a of No. 6 is released from the traction belt 28. Then, when the traction member 46 is pulled by hand and the traction belt 28 is pulled out from the winding unit 30 by the length of the tension belt 25 by an amount corresponding to the length adjustment, as shown in FIG. With a moderate tension. The traction belt 28 wound around the winding storage section 40 is urged in the winding direction by the mainspring spring 43 for the spare belt wrapped from the beginning, so that the amount pulled out by the traction member 46 is a shoulder. Only the part loosened by the belt 26 is pulled out.

In this state, when the hand pushing the cam lever 36 is released, the cam lever 36 is rotated by the coil spring 39 in a direction in which the cam lever 36 comes into contact with the surface of the traction belt 28, and the traction belt 28 is rotated by the teeth of the cam surface 37a. Fix it. Therefore, the tension belt 25 abutting on the cam surface 37a of the cam lever 36 from the portion where the fixing belt 21 is hooked is fixed while maintaining an appropriate tension.

Then, as shown in FIG.
When the hand is released from the operation unit 48, the pulling belt 28 is automatically taken out by the biasing force of the mainspring spring 43 from the portion pressed by the cam surface 37a of the cam lever 36. It is stored so as to be wound around the storage section 40. Accordingly, as shown in FIG. 9, the length adjustment of the tension belt 25 is wound on the winding storage unit 40 in addition to the previously wound traction belt 28, and the set maximum amount is set. It will be stored.

The traction member 46 returned together with the traction belt 28 stored in the winding storage section 40 of the winding section 30 by the mainspring spring 43 has a support section 47a at the front end of the support plate 32 of the winding section 30. Since the movement is regulated by the contact, the towing member 46 is not stored in the winding unit 30 and the towing operation can be performed by hand at any time.

As described above, the belt length adjusting device 10
Tow the tension belt 25 (traction belt 28) according to the body shape of the child, and lock the tension belt 25 in the pulled state, so that the tension of the tension belt 25 is appropriate for the body of the child. Can be stretched. In addition, in the state where the tension belt 25 is pulled, the pulling belt 28 is pulled out against the bias of the mainspring 43 of the winding section 30. Therefore, after the locking of the pulling belt 28, the pulling section 45 is automatically released. Since the remaining part of the traction belt 28 is stored in the winding storage part 40 of the winding part 30, the end of the traction belt 28 can be prevented from protruding from the seat 2. Therefore, no trouble occurs due to the end of the tension belt 25, and the appearance is good.

Further, if a cam lever 36 having a cam surface 37a is provided on the lock portion 34 and a tooth portion is formed on the cam surface 37a, the traction belt 28 is securely locked,
After the lock, the residual amount of the traction belt 28 can be easily stored.

The configuration of the belt length adjusting device of the present invention is not limited to the above-described embodiment as long as the terminal portion of the tension belt can be stored so as to be wound up in the child seat body. For example, another spring member may be used in place of the mainspring spring constituting the winding section, or the shaft may be turned by a handle. Further, the lock portion for fixing the traction belt is not limited to the cam lever, but may be another known member as long as it can press and fix the traction belt from above.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a child seat incorporating a belt length adjusting device according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view in FIG.

FIG. 3 is a partial side sectional view showing the belt length adjusting device in FIG. 2;

FIG. 4 is a front sectional view of the same part.

FIG. 5 is a plan view of the same part.

FIG. 6 is a partial sectional view showing the operation of the belt length adjusting device.

FIG. 7 is a partial cross-sectional view showing the action of towing the traction belt.

FIG. 8 is a partial cross-sectional view showing an operation of storing the traction belt after the lock portion is operated.

FIG. 9 is a partial cross-sectional view showing an operation of storing the remaining portion of the traction belt in the winding storage section.

FIG. 10 is a perspective view showing a conventional child seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Child seat main body 2 ... Seat part 3 ... Back part 10 ... Belt length adjusting device 20 ... Safety belt 21 ... Fixed belt 25 ... Tension belt 28 ... Traction belt 30 ... Winding part 34 ... Lock part 36 ... Cam lever 37a ... Cam Surface (tooth part) 40 ... Winding storage part 43 ... Spring spring 45 ... Traction part 46 ... Traction member

Claims (4)

[Claims] 1. A safety belt length adjusting device for a child seat in which a belt is stretchably attached to restrain a young person, wherein the belt has a fixed belt fixed to a seat portion and one end of the fixed belt. A tension belt that is arranged to be able to hang on a belt and has the other end connected to a winding portion mounted on a front end of the child seat, and is disposed so as to restrain a young person; However, the length is adjusted in accordance with the body type of the child, and the winding section is configured to be able to store the remaining amount of the tensioned belt whose length has been adjusted, wherein the safety belt length of the child seat is characterized in that Adjustment device. 2. A retracting section for retracting the belt, a retracting section for stopping the retracted belt in a retracted state, and a retractable retracting section for retracting a residual portion of the retracted belt. 2. The safety belt length adjusting device for a child seat according to claim 1, further comprising a winding storage section. 3. The safety of a child seat according to claim 2, wherein a spring is disposed in the winding storage section, and the remaining portion of the belt is wound by the spring. Belt length adjustment device. 4. The safety belt length adjusting device for a child seat according to claim 2, wherein the lock portion has a cam lever having a cam surface, and a tooth portion is formed on the cam surface.