JP4386534B2 - Child seat safety belt length adjustment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a child seat safety belt length adjusting device configured to be able to adjust the length of a belt according to the body shape of a young person.
[0002]
[Prior art]
Generally, a car seat for a young person (called a child seat) includes a fixed belt having one end fixed in the seat and a buckle attached to the other end so that the young person does not jump out of the child seat while the car is running. A safety belt having a pair of shoulder belts, which are provided so as to pass through a tongue hanging on the buckle so as to hang a shoulder and a waist of a young person, is attached.
[0003]
However, the body shape of the young person is various, and if the tension of the safety belt applied to the young person's body is loose, there is a problem in safety, and if the tension is too strong, the young person will be in pain. For this reason, it is necessary to stretch a safety belt with a moderate tension. Conventionally, after the shoulder belt is stretched, a separate hook is provided to maintain a moderate tension on the shoulder belt, and the shoulder belt is secured with the hook. Or the end of the shoulder belt was pulled out and fixed.
[0004]
[Problems to be solved by the invention]
However, when the shoulder belt is fixed with a separately prepared hook, the fixing operation of the hook is laborious and difficult to perform, and there is a possibility that the hook may be loosened during use. Furthermore, since the hook is stored alone and not attached to the child seat, it may be lost. In the case of the method of pulling out the end portion of the shoulder belt, the safety belt 51 attached to the child seat 50 is attached so that the shoulder belt 52 extends from the back of the back portion 53 to the seat portion 54 as shown in FIG. ing. Since the end portion 52a of the shoulder belt 52 protrudes from the front portion of the seat portion 54, when the end portion 52a of the shoulder belt 52 is pulled, the end portion 52a of the shoulder belt 52 that is pulled out is left as it is. It was. Therefore, there is a possibility that the end 52a of the shoulder belt 52 jumps during traveling and collides with a young person. Moreover, it did not give a good impression.
[0005]
This invention solves the above-mentioned subject, and while adjusting the length of a belt according to a body shape for young people, it improves safety by storing the remaining part of the belt whose length has been adjusted. An object of the present invention is to provide a safety belt length adjusting device for a child seat that does not hang down.
[0006]
[Means for Solving the Problems]
The child seat safety belt length adjusting apparatus according to the present invention is configured as follows in order to solve the above-described problems. That is,
A safety belt length adjusting device for a child seat in which a belt can be stretched to restrain a young person,
The belt includes a fixed belt fixed to a seat portion, and a tension belt having one end arranged to be hooked to the fixed belt and the other end connected to a winding portion attached to a front end portion of the child seat. Has been arranged to restrain the youth,
The winding unit pulls the belt, a lock unit that stops the pulled belt in a pulled state, and a winding storage unit that stores so as to wind up the remaining portion of the pulled belt. The pulling portion is disposed between the lock portion and the winding storage portion, and the belt is seated between the lock portion and the winding storage portion. It is arranged at a position to pass through the part and project outside from the seat part,
After the tension belt that protrudes to the outside is pulled to adjust the length according to the body shape of the young person, the remaining portion of the tension belt that has been adjusted in length can be stored in the winding storage portion. It is characterized by that.
[0008]
Further, any spring may be used as long as a spring is provided in the take-up storage portion and the remaining portion of the belt is wound by the spring.
[0009]
More preferably, the lock portion may have a cam lever having a cam surface, and a tooth portion may be formed on the cam surface.
[0010]
【The invention's effect】
Since the child seat safety belt length adjusting device of the present invention is configured as described above, if the belt is pulled in accordance with the body shape of the young person and the belt is locked in the pulled state, the child seat safety body length adjustment apparatus is obtained. In addition, the belt can be tensioned appropriately. Moreover, when the belt is pulled, the belt is pulled out against the urging of the mainspring spring, so after locking the belt, the belt's remaining part will automatically be taken up by the take-up storage part of the take-up part. Therefore, the end of the belt can be prevented from protruding from the seat. For this reason, troubles due to the end of the belt do not occur, and it may look good.
[0011]
Further, if a cam lever having a cam surface is provided in the lock portion and a tooth portion is formed on the cam surface, the belt can be firmly locked and the remaining portion of the belt can be easily stored after the lock.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A child seat safety belt length adjusting device (hereinafter referred to as a belt length adjusting device) 10 of this embodiment is attached to a child seat body 1 having a seat portion 2 and a back portion 3 as shown in FIGS. A safety belt 20 that restrains the person in the seat, and a winding unit 30 that processes the terminal of the safety belt 20 in a state in which the safety belt 20 is adjusted to a predetermined length according to the body shape of the young person. ing.
[0013]
In order to restrain the young person in the seat, the safety belt 20 covers the crotch of the young person, a fixing belt 21 having one end fixed to the seat frame 2a and a buckle 22 attached to the other end, and a hook on the buckle 22. The tension belt 25 is provided with a tongue 24 that can be worn and imparts appropriate tension to the young person. One end of the tension belt 25 is fixed to the seat frame 2a to connect the waist and shoulders of the young person. A tension belt connected to the fixed belt 21 is composed of a pair of shoulder belts 26 to be hung and a traction belt 28 connected to the other end of the pair of shoulder belts 26 at the rear of the back via a connection plate 27 at one end. The belt 25 is configured so that the belt length of the tension belt 25 can be adjusted by pulling the belt 25 at one end of the pulling belt 28.
[0014]
The traction belt 28 is inserted in the seat portion 2 and stored in the winding portion 30 disposed at the front end portion of the seat portion 2, and the spare belt portion previously stored in the winding portion 30 is the tension belt 25. The length is adjusted to include the length adjustment. In order to adjust the length of the traction belt 28, the traction belt 28 is inserted through the winding portion 30, temporarily taken out of the seat portion 2 and inserted into the traction member 46, and the traction belt 28 inserted through the traction member 46 is It is stored in the winding unit 30 again.
[0015]
As illustrated in FIGS. 3 to 5, the winding unit 30 includes a lock unit 34, a winding storage unit 40, and a traction unit 45. The lock portion 34 and the take-up storage portion 40 are disposed so as to face each other up and down across the guide plate 31 as a travel guide of the traction belt 28 at the front end portion of the seat portion 2, and the lock portion 34 has the cam lever 36. Then, it is disposed above the guide plate 31 and the winding storage unit 40 is disposed below. A traction portion 45 is constituted by the traction belt 28 and a traction member 46 inserted through the traction belt 28 outside the outlet of the belt passage 32 through which the traction belt 28 is inserted.
[0016]
The lock portion 34 includes a cam lever 36 that 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. The cam lever 36 presses the traction belt 28 traveling on the guide plate 31 to prevent the tension belt 25 from moving, and the cam lever 36 is disposed rearward of the cam portion 37 to press or release the traction belt 28. And a lever portion 38 that is operated as described above.
[0017]
A cam surface 37a is formed on the cam portion 37 so that the radius from the rotation center gradually increases toward the side opposite to the lever portion, and the cam surface 37a is locked in a direction in which the pulled traction belt 28 returns. The tooth part to be formed is formed. In addition, a coil spring 39 that has one end hooked to the guide plate 31 and the other end hooked to the lever portion 38 of the cam lever 36 and biased in the rotational direction is constantly pulled on the cam surface 37 a of the cam lever 36. The belt 28 is attached so as to be pressed. Therefore, when the lever portion 38 of the cam lever 36 is rotated in the clockwise direction in FIG. 3 (the portion indicated by the two-dot chain line in FIG. 3), the coil spring 39 biases the cam lever 36 in the counterclockwise direction. When the cam lever 36 is rotated counterclockwise by the biasing force of the coil spring 39, the cam surface 37a presses the traction belt 28 in a direction to bite into the traction belt 28, so that the traction belt 28 is moved toward the shoulder belt 26. There is no return.
[0018]
The take-up and storage unit 40 includes a storage case 41 that winds and stores the traction belt 28, a shaft portion 42 that sandwiches the tip of the traction belt 28 and winds the traction belt 28, and side portions of the storage case 41. The mainspring spring 43 is disposed and connected to the shaft portion 42 and biased toward the winding side of the traction belt 28.
[0019]
The storage case 41 is formed to have a capacity that can secure a storage space including the spare belt portion of the traction belt 28 and the length adjustment portion of the tension belt 25. Therefore, in use, as shown in FIG. The adjusted length of the traction belt 28 is all stored in the winding unit 30 as the remaining amount.
[0020]
As shown in FIG. 5, the traction member 46 is formed of a rectangular frame, and has an insertion portion 47 through which the traction belt 28 is inserted and an operation portion 48 that is pulled by hand, and the traction belt 28 is inserted. Thus, the support portion 47a of the insertion portion 47 that slides is formed in an arc shape to facilitate sliding. In addition, the support portion 47a is brought into contact with the front end portion 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 exit of the belt passage 32 of the winding portion 30. Also plays a role as a stopper to contact.
[0021]
Therefore, in a state where the residual amount of the traction belt 28 is all 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 (see FIG. 1 or FIG. 5). ).
[0022]
Next, the operation of the belt length adjusting device 10 configured as described above will be described with reference to FIGS.
[0023]
FIG. 6 shows the winding portion 30 in a state where the young person is seated on the child seat body 1 and the tension belt 25 is hooked on the fixing belt 21. In this state, the tension is not applied but the back 3 is loosened. Therefore, the remaining portion of the tension belt 25 is not stored in the winding storage unit 40 of the winding unit 30. However, since the traction belt 28 is wound around the winding storage unit 40 of the winding unit 30 by a predetermined amount in advance, the mainspring spring 43 urges the traction belt 28 in the winding direction.
[0024]
Next, in order to apply tension to the tension belt 25 according to the body shape of the young person, the traction belt 28 is pulled by the traction member 46. 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. 7) to release the cam surface 37 a of the cam lever 36 from the traction belt 28. Then, when the pulling member 46 is pulled by hand and the pulling belt 28 is pulled out from the winding portion 30 by the length adjustment of the tension belt 25, the shoulder belt 26 becomes the chest of the young person as shown in FIG. Will be tightened with moderate tension. The traction belt 28 wound around the take-up storage unit 40 is biased in the take-up direction by the spring spring 43 for the spare belt that has been wound from the beginning. Only the amount loosened by the belt 26 is pulled out.
[0025]
In this state, when the hand pressing the cam lever 36 is released, the cam lever 36 is rotated by the coil spring 39 in a direction in contact with the surface of the traction belt 28, and the traction belt 28 is fixed by the tooth portion of the cam surface 37a. Therefore, the tension belt 25 that is in contact with the cam surface 37a of the cam lever 36 from the hooking portion with the fixing belt 21 is fixed in a state where an appropriate tension is maintained.
[0026]
Then, as shown in FIG. 8, when the hand is released from the operation portion 48 of the traction member 46, the traction belt 28 is pulled outward from the portion pressed by the cam surface 37 a of the cam lever 36. It is stored so as to be automatically wound around the winding storage unit 40 by the urging force of the mainspring spring 43. Therefore, as shown in FIG. 9, the length adjustment amount of the tension belt 25 is wound around the winding storage unit 40 in addition to the traction belt 28 wound in advance, and the maximum amount set is set. Will be stored.
[0027]
Note that the traction member 46 returned together with the traction belt 28 accommodated in the take-up accommodating portion 40 of the take-up portion 30 by the mainspring spring 43 is brought into contact with the support portion 47a at the front end portion of the support plate 32 of the take-up portion 30. Therefore, the traction member 46 is not housed in the take-up unit 30 and can be pulled by hand anytime.
[0028]
As described above, the belt length adjusting device 10 pulls the tension belt 25 (the traction belt 28) according to the body shape of the young person, and locks the tension belt 25 in the pulled state. Accordingly, the tension of the tension belt 25 can be moderately tensioned. Moreover, in the state where the tension belt 25 is pulled, the traction belt 28 is pulled out against the urging force of the mainspring spring 43 of the winding portion 30. Therefore, after the traction belt 28 is locked and the traction portion 45 is released, automatic Thus, since the remaining portion of the traction belt 28 is stored in the winding storage portion 40 of the winding portion 30, the end portion of the traction belt 28 can be prevented from protruding from the seat portion 2. Therefore, the trouble by the edge part of the tension belt 25 does not generate | occur | produce, and also it may be visible.
[0029]
Further, if the cam lever 36 having the cam surface 37a is disposed on the lock portion 34 and the tooth portion is formed on the cam surface 37a, the traction belt 28 is firmly locked, and the residual portion of the traction belt 28 is locked after the lock. Can be easily stored.
[0030]
In addition, the structure of the belt length adjusting device of this invention will not be limited to said form, if the terminal part of a tension belt can be accommodated so that it may wind up in a child seat main body. For example, another spring member may be used instead of the mainspring constituting the winding portion, and the shaft portion may be rotated by a handle. Further, the lock portion for fixing the traction belt may not be a cam lever, but may be another known one as long as the traction belt can be fixed by pressing 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 an embodiment of the present invention.
2 is a longitudinal sectional view in FIG. 1. FIG. 3 is a partial side sectional view showing a belt length adjusting device in FIG. 2. FIG. 4 is a front sectional view of the same part. FIG. 7 is a partial cross-sectional view showing the operation of pulling the traction belt. FIG. 8 is a view showing the operation of storing the traction belt after the lock portion is operated. Partial cross-sectional view [FIG. 9] Partial cross-sectional view showing the operation of storing the remaining portion of the traction belt in the winding storage portion [FIG. 10] 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 Face (tooth part)
40 ... Winding storage part 43 ... Spring spring 45 ... Traction part 46 ... Traction member

Claims (3)

A safety belt length adjusting device for a child seat in which a belt can be stretched to restrain a young person,
The belt includes a fixed belt fixed to a seat portion, and a tension belt having one end arranged to be hooked to the fixed belt and the other end connected to a winding portion attached to a front end portion of the child seat. Has been arranged to restrain the youth,
The winding unit pulls the belt, a lock unit that stops the pulled belt in a pulled state, and a winding storage unit that stores so as to wind up the remaining portion of the pulled belt. The pulling portion is disposed between the lock portion and the winding storage portion, and the belt is seated between the lock portion and the winding storage portion. It is arranged at a position to pass through the part and project outside from the seat part,
After the tension belt that protrudes to the outside is pulled to adjust the length according to the body shape of the young person, the remaining portion of the tension belt that has been adjusted in length can be stored in the winding storage portion. A safety belt length adjusting device for a child seat. Before Kimakito housing portion, the spiral spring is arranged, the safety belt length adjustment of the child seat according to claim 1, wherein the remainder of said belt are configured to take up by the spiral spring apparatus. The child seat safety belt length adjusting device according to claim 2 , wherein the lock portion includes a cam lever having a cam surface, and a tooth portion is formed on the cam surface .

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