CN111839868A

CN111839868A - Light neck brace and application

Info

Publication number: CN111839868A
Application number: CN202010826452.0A
Authority: CN
Inventors: 王江; 季金凤; 赵凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-10-30
Anticipated expiration: 2040-08-17
Also published as: CN116712236A; CN111839868B

Abstract

The invention discloses a light neck brace and application, wherein the light neck brace comprises a head support part and a support part, wherein the light neck brace has an adjusting state and a free state, and can be operated to change between the adjusting state and the free state, in the adjusting state, the head support part can only be adjusted towards the direction far away from the support part, so that the height position of the supported head cannot be reduced, and in the free state, the head support part can be adjusted towards the direction far away from the support part or close to the support part at will.

Description

Light neck brace and application

Technical Field

The invention relates to a neck support device, in particular to a light neck support and application.

Background

The neck serves to connect the head and the trunk, and the head having a large weight is supported on the trunk through the neck. The head can be flexibly rotated left and right or up and down by the neck, and the neck bears the pressure generated by the weight of the head. If the head is kept in a fixed position for a long time, a large burden is imposed on the neck, and people working for a long time on a desk often feel aching neck pain. More seriously, the head is kept in a bad posture for a long time, for example, a student group may approach the head too close to a book or a desk during the development process, which causes the occurrence of visual diseases such as myopia and the like, and the neck is also stressed inappropriately.

The neck brace can hold the neck at an angle and distribute the weight of the head to the torso because the neck brace itself for supporting the head is supported on the shoulders, so that the burden on the neck can be reduced. However, the current neck brace is often designed for patients with neck or head diseases and needs rehabilitation therapy, which results in that: on one hand, the volume is heavier, the head is supported on the shoulder by virtue of the heavy volume and the head can not flexibly rotate, on the other hand, the neck support cannot be adjusted, the angle between the head and the neck is kept fixed, and a user is difficult to lean or raise his head after wearing the neck support, so that the movement of the head is limited, and the rehabilitation and health care effects are achieved. Obviously, the main target group of this type of neck brace is patients with existing diseases in the neck or head. This type of neck brace is difficult to apply when healthy people want to protect the neck.

Disclosure of Invention

It is an object of the present invention to provide a lightweight neck brace and application in which the lightweight neck brace can be conveniently worn on the neck of a user and the relative position of the head and neck of the user can be conveniently adjusted.

It is another object of the present invention to provide a lightweight cervical brace and application, wherein the lightweight cervical brace is capable of supporting the head of a user and angling the head relative to the neck so that the head-neck relationship of the user can be maintained in the correct position by the lightweight cervical brace.

It is another object of the present invention to provide a lightweight neck brace and use, wherein the lightweight neck brace can be used to prevent myopia.

It is another object of the present invention to provide a lightweight neck brace and application wherein the lightweight neck brace includes a head support and a support, wherein the head support is supported on the support, wherein the support can be supported on the torso to relieve pressure on the neck from the weight of the head.

It is another object of the present invention to provide a lightweight cervical brace and application in which the head support portion and the support portion of the lightweight cervical brace form an included angle therebetween, and the included angle can be adjusted in size to change the head and neck relationship of a user by adjusting the angle of the head relative to the neck.

It is another object of the present invention to provide a lightweight neck brace and application in which the head support and the support are maintained in an adjusted state after an external force for adjusting the angle of the head support and the support is removed.

It is another object of the present invention to provide a lightweight brace and application wherein the head support of the lightweight brace is supportable on the chin and configured to have a massaging effect to massage the chin.

Another object of the present invention is to provide a lightweight neck brace and application, in which the head support portion of the lightweight neck brace can be folded, the support portion can be folded, and the head support portion and the support portion can be folded over each other to be stored in a small size.

According to one aspect of the invention, there is provided a lightweight neck brace, wherein the lightweight neck brace comprises:

a head support, wherein the head support is adapted to be supported on the head;

a supporting portion, wherein the supporting portion comprises a first supporting arm and a second supporting arm, wherein the first supporting arm and the second supporting arm extend from two ends of the head supporting portion towards the outside to be connected with each other so as to form a stable triangular supporting structure, wherein the head supporting portion can be supported on the supporting portion, and the supporting portion is suitable for being supported on the trunk portion; and

two adjusting parts, wherein the two adjusting parts are positioned at the joint of the head supporting part and the first supporting arm and the second supporting arm of the supporting part, and the head supporting part is rotatably connected to the supporting part by the adjusting part, so that the size of an included angle formed between the head supporting part and the supporting part can be adjusted, wherein said lightweight neck brace has an adjusted condition and a free condition and is operable to be changed between said adjusted condition and said free condition, in the adjustment state, the head support portion can be adjusted only in a direction away from the support portion so that the height position of the supported head portion cannot be lowered, in the free state, the head support portion can be adjusted in a direction to be arbitrarily moved away from or close to the support portion.

According to an embodiment of the present invention, the adjusting portion includes an outer rotating member and an inner rotating member, wherein the outer rotating member is mounted on the head supporting portion, the inner rotating member is mounted on the supporting portion, wherein an inner wall of the outer rotating member surrounds to form an accommodating space, the inner rotating member is accommodated in the accommodating space, and an inner wall of the outer rotating member protrudes to form at least two unidirectional teeth, wherein the inner rotating member is engaged with the outer rotating member and the inner rotating member and the outer rotating member can rotate relatively and rotate unidirectionally, and in the adjusting state, the inner rotating member is limited to rotate unidirectionally only with respect to the outer rotating member, and in the free state, the inner rotating member can be released to rotate freely with respect to the outer rotating member.

According to an embodiment of the present invention, the adjusting portion includes an outer rotating member and an inner rotating member, wherein the outer rotating member is mounted on the supporting portion, the inner rotating member is mounted on the head supporting portion, wherein an inner wall of the outer rotating member surrounds to form a receiving space, the inner rotating member is received in the receiving space, and an inner wall of the outer rotating member protrudes to form at least two unidirectional teeth, wherein the inner rotating member is engaged with the outer rotating member and the inner rotating member and the outer rotating member can rotate relatively and rotate unidirectionally, and in the adjusting state, the inner rotating member is limited to rotate unidirectionally only with respect to the outer rotating member, and in the free state, the inner rotating member can be released to rotate freely with respect to the outer rotating member.

According to one embodiment of the invention, the inner rotating member comprises a fixed base and a connecting arm, wherein the connecting arm has a connecting end and a free end, the connecting end of the connecting arm is connected to the fixed base, the free end of the connecting arm is close to the tooth of the outer rotating member, in the adjustment state, the free end of the connecting arm is engaged with the tooth and can only be disengaged from one tooth in one direction and then engaged with the next tooth, and in the free state, the free terminal of the connecting arm is disengaged from the tooth so that the outer rotating frame and the inner rotating member can rotate freely.

According to an embodiment of the present invention, the adjusting portion further includes an adjusting member, wherein the inner rotating member is restrained to the adjusting member, in the adjusting state, the adjusting member restrains the inner rotating member to press the connecting arm against the teeth of the outer rotating member, in the free state, the adjusting member restrains the inner rotating member to keep the connecting arm and the teeth of the outer rotating member spaced apart, and the lightweight neck brace can be switched between the adjusting state and the free state by changing a position of the adjusting member.

According to one embodiment of the invention, the connecting arm is resiliently connected to the holder.

According to an embodiment of the invention, the number of the connecting arms is two, the holder has a first end and a second end, one of the connecting arms is connected to the first end and extends towards the second end, the other connecting arm is connected to the second end and extends towards the first end, and the two connecting arms are located on both sides of the holder.

According to an embodiment of the present invention, the extending direction of the free end of the connecting arm from the connecting end coincides with the rotating direction of the inner rotating member.

According to an embodiment of the present invention, the adjusting member includes a first limiting wing and a second limiting wing and has two limiting grooves, wherein two of the connecting arms are correspondingly limited in one of the limiting grooves, when the position of the adjusting member is changed, the first limiting wing and the second limiting wing respectively drive the positions of the two connecting arms to change so that the light neck brace is changed between the adjusting state and the limiting state.

According to one embodiment of the invention, the adjustment member is mounted to the head support and is carried to move outwardly when the head support is pulled outwardly to change the lightweight neck brace from the adjusted state to the free state.

According to an embodiment of the present invention, the adjusting part further comprises an adjusting part mounting housing and an elastic connecting member, wherein the adjusting part mounting housing forms a mounting space, the adjusting part is positioned in the mounting space, the elastic connecting piece is positioned between the adjusting piece and the adjusting part mounting shell, the head supporting part is inserted in the adjusting part mounting shell in a reciprocating manner, when the head supporting part is pulled outwards, the adjusting piece can be driven by the head supporting part to move outwards, and meanwhile, the elastic connecting piece is extruded, whereby the connecting arm of the inner rotating member can be released from the outer rotating member to become the free state, when the acting force applied to the head supporting part disappears, the adjusting piece automatically resets under the action of the elastic connecting piece to change into the adjusting state.

According to one embodiment of the invention, the lightweight neck brace further comprises a securing portion, wherein the securing portion extends between two ends of the head support portion to form a wearing channel with adjustable size.

According to one embodiment of the invention, the head support comprises a first support arm and a second support arm, wherein the first support arm is pivotally connected to the second support arm to be folded towards the second support arm.

According to an embodiment of the invention, the first support arm of the support part is pivotably connected to the second support arm to be folded towards the second support arm.

According to another aspect of the invention, there is provided a method of adjusting a lightweight neck brace, comprising the steps of:

by changing an outer rotating member and an inner rotating member of an adjusting portion of a light neck brace between an adjusting state and a free state a head supporting portion and a supporting portion of the light neck brace, wherein the head supporting part and the supporting part of the light neck brace are rotatably connected by the adjusting part, the head supporting part is suitable for supporting the head and is supported on the supporting part, the supporting part is suitable for being supported on the trunk part, when the inner rotating piece is clamped on the outer rotating piece, the light neck brace is in the adjusting state, the head support part of the light neck brace can rotate in a direction away from the support part in one direction, but cannot rotate toward the direction close to the support part, when the inner rotating part is separated from the outer rotating part, the lightweight neck brace is in the free state, and the head support portion can rotate towards or away from the support portion at will.

According to an embodiment of the invention, in the above method, the position of the inner rotating member is controlled by an adjusting member, and the lightweight neck brace can be changed from the adjusted state to the free state by pulling the adjusting member.

According to one embodiment of the invention, in the above method, the position of the inner rotating member is controlled by an adjusting member, and when the adjusting member is released, the lightweight neck brace automatically changes from the free state to the adjusted state.

According to an embodiment of the invention, in the above method, the head is massaged by the head support.

According to an embodiment of the present invention, in the above method, an angle formed by a first support arm and a second support arm of the head support is changed to accommodate heads of different sizes.

Drawings

Fig. 1 is a schematic view of a lightweight neck brace according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the lightweight neck brace according to the above preferred embodiment of the invention.

Fig. 3 is a schematic view of the application of the lightweight neck brace according to the above preferred embodiment of the invention.

Fig. 4 is an adjustment view of the lightweight neck brace in an adjusted state according to the above preferred embodiment of the present invention.

Fig. 5 is a schematic view of another application of the lightweight neck brace according to the above preferred embodiment of the present invention.

Fig. 6 is a schematic view of the adjustment of the lightweight neck brace in a free state according to the above preferred embodiment of the invention.

Fig. 7 is a schematic view of a variant embodiment of the lightweight neck brace according to the above preferred embodiment of the invention.

Fig. 8 is a schematic view of another embodiment of the lightweight neck brace according to the above preferred embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 6, a lightweight neck brace 1 according to a preferred embodiment of the present invention is illustrated.

The lightweight neck brace 1 can support the head of a user on the torso to relieve the pressure of the weight of the head on the neck, and the lightweight neck brace 1 itself can be designed to be relatively lightweight and can be adapted to the needs of the user to be adjusted. The use of the lightweight brace 1 is very convenient compared to previous one-piece awkward braces.

In detail, the lightweight neck brace 1 comprises a head support 10 and a support 20, wherein the head support 10 is adapted to support the head of the user in a desired position, the head support 10 can be supported on the support 20, and the support 20 can be supported on the torso of the user, for example, on the chest, shoulder and/or abdomen of the user.

It will be appreciated that the lightweight neck brace 1 can be applied not only to humans, but also to animals, as long as the head support 10 and the support 20 are adapted, and such modifications are within the scope of the present invention.

The lightweight neck brace 1 forms a wearing channel 100 in which the neck of a user can be held in the wearing channel 100 while wearing the lightweight neck brace 1. The wearing channel 100 is sized to be adjustable to accommodate different users. Alternatively, the user's head may be held in the wearing channel 100 while wearing the lightweight neck brace 1.

Referring to fig. 1 and 2, the supporting portion 20 includes a first supporting arm 21 and a second supporting arm 22, wherein the first supporting arm 21 and the second supporting arm 22 respectively extend outward from the head supporting portion 10 and are connected to each other at one end. In detail, one end of the first support arm 21 is connected to the head support 10, one end of the second support section 20 is connected to the head support 10, and the other end of the first support arm 21 is connected to the other end of the second support section 20. The first support arm 21, the second support arm 22, and the head support portion 10 of the support portion 20 form a stable triangular support structure so that the head can be stably supported on the trunk.

The support portion 20 can form an angle with the head support portion 10, and the size of the angle is set to be adjustable. The light neck brace 1 further comprises at least one adjusting part 30, wherein the adjusting part 30 is arranged at the joint of the supporting part 20 and the head supporting part 10, so that the angle between the supporting part 20 and the head supporting part 10 can be adjusted by the adjusting part 30, and the head supporting part 10 and the supporting part 20 are kept at the adjusted positions. Preferably, in this preferred example of the lightweight neck brace 1 shown in fig. 1 to 6, the lightweight neck brace 1 comprises two of the adjustment portions 30, one of the adjustment portions 30 being provided at the junction of the first support arm 21 and the head support portion 10, and the other of the adjustment portions 30 being provided at the junction of the second support arm 22 and the head support portion 10.

The head support 10 can be folded towards the support 20 so that the lightweight brace 1 can be folded to a smaller size, thus making the lightweight brace 1 portable. The head support 10 can also be supported at a fixed angle to the support portion 20 so that the head support 10 can support the head at a desired angle.

Further, the lightweight neck brace 1 has an effect of preventing myopia. When a user sits on a desk or a computer, the head of the user tends to approach the desk or the computer, and the user may be near sighted in the long run. The head support 10 and the support 20 of the lightweight neck brace 1 can be adjusted at an angle and fixed at an angle to prevent the head from approaching a desk or a computer, thereby preventing myopia.

Still further, the head rest 10 and the support portion 20 of the lightweight brace 1 are arranged to be unidirectionally adjustable. When the lightweight neck brace 1 is worn on the body of a user, the head support 10 cannot be adjusted toward the support 20 so that the head cannot be lowered, thereby contributing to the protection of the user's eyesight. The head support 10 can be adjusted in a direction away from the support 20 to suit different postures and use requirements of the user.

It should be noted that another advantage of the head support 10 and the support portion 20 being arranged for unidirectional adjustment is that when a head is supported on the head support 10, there is a tendency to move downward, since the head support 10 cannot move toward the support portion 20, the head support 10 is limited to move only in a direction away from the support portion 20, thereby reducing the possibility that the head will move gradually downward unknowingly due to insufficient connection strength of the head support 10 and the support portion 20.

For the lightweight neck brace 1, the lightweight neck brace 1 has an adjusted state and a free state. In the adjusted state, referring to fig. 3 and 4, the head support portion 10 of the lightweight neck brace 1 is unidirectionally adjustable with respect to the support portion 20 and can be fixed in the adjusted state, and the head support portion 10 cannot move toward the support portion 20 so that the head is stably supported on the head support portion 10. In the free state, referring to fig. 5 and 6, the head rest 10 of the lightweight neck brace 1 can be adjusted towards the support 20 and also away from the support 20. That is, the rotation direction of the head support 10 is not limited. The head support 10 may be adjusted to be folded over the support 20. It is understood that the head support 10 and the support 20 according to the present invention are arranged to be adjusted in one direction, which means that the head support 10 of the lightweight neck brace 1 is only allowed to be adjusted in one direction relative to the support 20 when the lightweight neck brace 1 is in the adjusted state.

By adjusting the adjusting portion 30, the light neck brace 1 can be switched between the adjusted state and the free state. In particular, when no external force is applied to the adjusting portion 30, the light weight neck brace 1 is in the adjusting state, and accordingly, when an external force is applied to the adjusting portion 30, the light weight neck brace 1 can be switched from the adjusting state to the free state.

In detail, referring to fig. 2, the adjusting part 30 includes an outer rotating member 31 and an inner rotating member 32, wherein the outer rotating member 31 is disposed on the supporting part 20, the inner rotating member 32 is disposed on the head supporting part 10, and the inner rotating member 32 is rotatably connected to the outer rotating member 31. By the rotation of the outer rotating member 31 and the inner rotating member 32, the size of the included angle between the supporting portion 20 and the head supporting portion 10 is adjusted. Alternatively, the outer rotating member 31 is provided to the head receiving portion 10, and the inner rotating member 32 is provided to the supporting portion 20.

With continued reference to fig. 2, the head supporting portion 10 has two end portions corresponding to each other, wherein the inner rotating pieces 32 of the two adjusting portions 30 are respectively disposed at each end portion of the head supporting portion 10, and the outer rotating pieces 31 of the two adjusting portions 30 are respectively disposed at the end portions of the first supporting arm 21 and the second supporting arm 22, wherein each of the inner rotating pieces 31 is respectively rotatably connected to each of the outer rotating pieces 31, such that each end portion of the head supporting portion 10 is respectively disposed at the end portion of the first supporting arm 21 and the end portion of the second supporting arm 22 of the supporting portion 20 through each of the adjusting portions 30. Further, the outer rotating member 31 is formed with a receiving space 310, wherein the inner rotating member 32 is located in the receiving space 310 of the outer rotating member 31. The outer rotating member 31 has an inner wall, wherein at least a portion of the inner wall is recessed to form at least two unidirectional tooth grooves 311, the inner rotating member 32 can be rotated to engage with the unidirectional tooth grooves 311 of the outer rotating member 31, and when the outer rotating member 31 or the inner rotating member 32 is applied with an acting force, the inner rotating member 32 can be unidirectionally disengaged from one of the unidirectional tooth grooves 311 and then engage with the next unidirectional tooth groove 311.

More specifically, when the lightweight neck brace 1 is in the adjusted state, the inner rotor 32 is originally engaged with one of the one-way tooth grooves 311 of the outer rotor 31 so that the head support portion 10 is held fixed to the support portion 20. Applying a force to the inner rotating member 32 or the outer rotating member 31 to disengage the inner rotating member 32 from one of the one-way tooth grooves 311 and then to enter the next one-way tooth groove 311, the head bearing 10 is returned to a fixed state with respect to the supporting portion 20 and the position of the head bearing 10 with respect to the supporting portion 20 has been adjusted. The angle between the head support 10 and the support 20 is enlarged.

The outer rotating member 31 may be implemented as a spline ring, and the one-way spline 311 is formed at the inner wall of the outer rotating member 31. The number of the unidirectional teeth slots 311 is plural, and the unidirectional teeth slots 311 are symmetrically arranged.

The inner rotating member 32 is formed with at least one connecting arm 321, wherein the connecting arm 321 can be engaged with the one-way tooth slot 311 of the outer rotating member 31. The number of the connecting arms 321 may be two or more. Adjacent ones of the connecting arms 321 are held at a certain interval. In this embodiment, the two connecting arms 321 are implemented, two of the connecting arms 321 can be respectively engaged with the one-way tooth grooves 311 of the outer rotor 31, and the two connecting arms 321 are implemented to be centrosymmetric.

In detail, the inner rotating member 32 includes a fixing base 322 and the connecting arms 321, wherein two of the connecting arms 321 extend from the fixing base 322, and the fixing base 322 is fixed to the head supporting portion 10. The connecting arm 321 has a connecting end 3211 and a free end 3212 corresponding to the connecting end 3211, wherein the connecting end 3211 of the connecting arm 321 is connected to the fixing base 322, and the free end 3212 of the connecting arm 321 abuts against the one-way tooth slot 311 of the outer rotating member 31. Preferably, the connecting end 3211 of the connecting arm 321 integrally extends outward from the fixing seat 322 in a cantilevered manner, so as to allow the connecting arm 321 to deform toward the fixing seat 322 when being pressed by a force and to return to an original state when the pressure is removed.

The connecting arm 321 is formed with a supporting surface 3213, the supporting surface 3213 can be formed at the free end 3212 of the connecting arm 321, wherein the supporting surface 3213 can be pressed against the one-way tooth slot 311 of the outer rotating member 31. The supporting surface 3213 may be an inclined surface, and the inclined surface of the supporting surface 3213 may be capable of cooperating with the inclined surface of the one-way tooth slot 311 of the outer rotating member 31.

The inner rotating member 32 is mounted to the outer rotating member 31, and the connecting arm 321 is pressed and pressed against the inner wall of the outer rotating member 31. When the inner rotating member 32 and the outer rotating member 31 rotate relatively, the inner rotating member 32 can be rotated to the supporting surface 3213 of the connecting arm 321 to engage with the one-way tooth slot 311 of the outer rotating member 31. When the inner rotating member 32 and the outer rotating member 31 further rotate relatively, the inner rotating member 32 can be rotated to allow the supporting surface 3213 of the connecting arm 321 to be engaged with the next one-way tooth slot 311 of the outer rotating member 31.

The extending direction of the connecting arm 321 is set along the inner wall of the outer rotating member 31, or the extending direction is set along the rotating direction of the inner rotating member 32 and the outer rotating member 31. When the outer rotating member 31 and the inner rotating member 32 rotate relatively, since the connecting arm 321 is located along the rotating direction of the outer rotating member 31 and the inner rotating member 32, the acting force applied to the connecting arm 321 is mainly the squeezing effect generated at the free end 3212 of the connecting arm 321, and the acting force applied to the connection between the connecting arm 321 and the fixing base 322 is small, so that the abrasion of the connection between the connecting arm 321 and the fixing base 322 of the inner rotating member 32 is reduced, and the rotation of the outer rotating member 31 and the inner rotating member 32 is facilitated, and the resistance is reduced.

The user can rotate the outer rotation member 31 and the inner rotation member 32 with a small force, and when the inner rotation member 32 is rotated until the supporting surface 3213 of the connecting arm 321 is aligned with the one-way spline 311 of the outer rotation member 31, the head bearing 10 can be stably held at the adjusted position since the head bearing 10 and the supporting portion 20 cannot be rotated in the opposite directions.

In other words, the outer rotating member 31 is attached to the support portion 20, the inner rotating member 32 is attached to the head rest 10, the outer rotating member 31 and the inner rotating member 32 rotate relatively, and only the head rest 10 can be rotated in a direction away from the support portion 20 when the lightweight brace 1 is in the adjusted state.

Since the supporting surface 3213 of the connecting arm 321 of the inner rotating member 32 is pressed against the one-way tooth slot 311 of the outer rotating member 31, the outer rotating member 31 and the inner rotating member 32 cannot rotate freely clockwise or counterclockwise, and the inner rotating member 32 can only rotate relative to the outer rotating member 31 in the direction of the one-way tooth slot 311. When the inner rotating member 32 rotates in the direction of the one-way tooth slot 311, the head receiving portion 10 rotates in a direction away from the supporting portion 20. When the inner rotor 32 is rotated to engage the supporting surface 3213 of the connecting arm 321 of the inner rotor 32 with the one-way tooth groove 311 of the outer rotor 31, the head receiving portion 10 is fixed to the supporting portion 20 and the head receiving portion 10 cannot rotate in a direction close to the supporting portion 20.

With continued reference to fig. 2, the fixing seat 322 has a first end 3221 and a second end 3222 corresponding to the first end 3221, wherein one of the connecting arms 321 is connected to the first end 3221 and extends in a hanging manner toward the second end 3222, and the other connecting arm 321 is connected to the first end 3221 and extends in a hanging manner toward the second end 3222. In other words, the free end 3212 and the second end 3222 of the connecting arm 321 connected to the first end 3221 are kept at a certain distance to allow the connecting arm 321 to deform toward the fixing seat 322 when the connecting arm is pressed, and the free end 3212 and the first end 3221 of the connecting arm 321 connected to the second connecting end 3211 are kept at a certain distance to allow the connecting arm 321 to deform toward the fixing seat 322 when the connecting arm 321 is pressed.

The distance between the free end 3212 of the connecting arm 321 and the fixing seat 322 is variable within a certain range, for example, when the supporting surface 3213 of the connecting arm 321 is pressed against the one-way slot 311 formed by the inner wall of the outer rotating member 31, and is disengaged from one-way slot 311 and engaged with the next one-way slot 311, the distance between the free end 3212 of the connecting arm 321 and the fixing seat 322 is changed.

When the outer rotating member 31 rotates relative to the inner rotating member 32, the force applied by the outer rotating member 31 can press the free end 3212 of the connecting arm 321 inward, and the connecting arm 321 has a certain elasticity so as to maintain the engagement with the outer rotating member 31. Since the connecting arm 321 is arc-shaped and extends in the rotating direction of the outer rotating member 31 and the inner rotating member 32, the connecting arm 321 is mainly stressed by the free end 3212, thereby reducing the force applied to the connecting end 3211 of the connecting arm 321. From the perspective of the connecting arm 321 of the inner rotating member 32, the connecting end 3211 of the connecting arm 321 does not provide excessive resistance to rotation of the outer rotating member 31 and the inner rotating member 32, thereby also facilitating easier rotation of the outer rotating member 31 and the inner rotating member 32 by the user.

Further, for the sake of uniformity of the force applied to the outer rotating member 31 and the inner rotating member 32 and smoothness of rotation, the two connecting arms 321 are arranged to be centrosymmetric, so that when the outer rotating member 31 rotates relative to the inner rotating member 32, the force applied to the free ends 3212 of the two connecting arms 321 is along the same rotation direction.

The lightweight neck brace 1 is controllably transformable between the adjusted condition and the free condition. The adjustment portion 30 further comprises an adjustment member 33, wherein the adjustment member 33 is operable to allow the lightweight neck brace 1 to be switched between the adjusted state and the free state.

In the adjustment state, the free end 3212 of the connecting arm 321 of the inner rotating member 32 is restrained by the adjustment member 33, so that the inner rotating member 32 is kept pressed against the outer rotating member 31, so that the inner rotating member 32 and the outer rotating member 31 cannot rotate freely.

In the free state, the adjusting member 33 releases the free end 3212 of the connecting arm 321 of the inner rotating member 32, so that the inner rotating member 32 can be disengaged from the outer rotating member 31, and the inner rotating member 32 and the outer rotating member 31 can be rotated in either the clockwise or counterclockwise direction.

In detail, the adjusting member 33 has at least one limiting groove 330, and the connecting arm 321 of the inner rotating member 32 is limited in the limiting groove 330 of the adjusting member 33, so as not to be disengaged from the outer rotating member 31. In this embodiment, since the number of the connecting arms 321 is two, the number of the limiting grooves 330 may also be two.

The connecting arm 321 may protrude outward to form a limiting post 3214, and the limiting post 3214 extends in the axial direction. The position-limiting post 3214 of the connecting arm 321 is limited in the position-limiting groove 330 of the adjusting element 33.

The two limiting posts 3214 of the two connecting arms 321 may be symmetrically arranged, for example, axially symmetrically arranged, and correspondingly, the two limiting grooves 330 of the adjusting member 33 may also be axially symmetrically arranged. Two of the connecting arms 321 may be provided in a centrosymmetric arrangement.

When the adjusting member 33 is adjusted to drive the free end 3212 of the connecting arm 321 to move inward to disengage from the one-way tooth slot 311 of the outer rotating member 31, the two limiting slots 330 can drive the two limiting posts 3214 to move synchronously, so that the two connecting arms 321 disengage from the outer rotating member 31 synchronously, and the light neck brace 1 is adjusted to the free state.

In more detail, the adjusting element 33 includes a first wing 331 and a second wing 332, wherein the first wing 331 is formed with one of the limiting grooves 330, and the second wing 332 is formed with the other limiting groove 330. The adjusting member 33 further includes a mounting seat 333, wherein the first limiting wing 331 and the second limiting wing 332 respectively extend to two sides of the mounting seat 333, and the mounting seat 333 is adapted to be mounted at an end portion of the head supporting portion 10.

The first position-limiting wing 331 is connected to the second position-limiting wing 332 and the mounting seat 333 is disposed at one side of the first position-limiting wing 331 and the second position-limiting wing 332. The user can operate the head supporting portion 10, for example, pull the head supporting portion 10 outward, so as to move the adjusting member 33, thereby releasing the supporting surface 3213 of the connecting arm 321 of the inner rotating member 32 from the one-way tooth slot 311 of the outer rotating member 31.

The limiting groove 330 is inclined, and when the adjusting member 33 is driven by the head supporting portion 10 to move, the limiting groove 330 of the adjusting member 33 moves, so as to restrict the limiting post 3214 to move inward, and further to draw the free end 3212 of the connecting arm 321 inward, so that the supporting surface 3213 of the connecting arm 321 is separated from the one-way tooth slot 311 of the external rotating member 31.

The extending direction of the stopper groove 330 and the movable direction of the adjustment member 33 may be inclined. The adjusting member 33 has a first position and a second position, when the adjusting member 33 is located at the first position, the connecting arm 321 of the inner rotating member 32 is limited by the adjusting member 33 to keep pressing on the outer rotating member 31, and when the adjusting member 33 is located at the second position, the connecting arm 321 of the inner rotating member 32 is pressed in a direction away from the outer rotating member 31, so that the inner rotating member 32 is released. When the adjusting member 33 moves from the first position to the second position, the inclined stopper groove 330 keeps the stopper of the connecting arm 321 and pulls the free end 3212 of the connecting arm 321 away from the one-way slot 311 of the outer rotating member 31.

It is understood that the adjusting member 33 is configured to be limited, and the adjusting member 33 can move from the first position to the second position or from the second position to the first position, but is difficult to extend in other directions.

In more detail, when the position-limiting posts 3214 of the connecting arm 321 of the inner rotating member 32 are respectively located at the same end of the two position-limiting grooves 330, a distance between the two position-limiting posts 3214 is a first distance, when the position-limiting posts 3214 of the connecting arm 321 of the inner rotating member 32 are respectively located at the other end of the two position-limiting grooves 330, a distance between the two position-limiting posts 3214 is a second distance, and the first distance is greater than the second distance, so that when the position-limiting posts 3214 are respectively located at the two ends of the position-limiting grooves 330, the relative positions of the two position-limiting posts 3214 are changed, thereby changing the position of the connecting arm 321, and further the light neck brace 1 can be changed between the free state and the adjustment state.

When the two limiting columns 3214 are drawn close to each other, the two connecting arms 321 draw close towards the fixing base, so as to be away from the unidirectional tooth socket 311 of the outer rotating member 31, the supporting surface of the connecting arms 321 is released from the unidirectional tooth socket 311, and the light neck brace 1 is in a free state.

When the two limiting columns 3214 are away from each other, the two connecting arms 321 approach towards the outer rotating member 31, so that the supporting surface 3213 approaches the one-way tooth slot 311 of the outer rotating member 31 to be abutted against the one-way tooth slot 311, and the light neck brace 1 is in the adjusting state.

The adjusting piece 33 is located at one side of the inner rotating piece 32, the limiting column 3214 is located at the axial direction, and the state of the light neck brace 1 can be adjusted by changing the relative position of the adjusting piece 33 and the inner rotating piece 32.

Further, two of the catching grooves 330 may be formed in a shape of a letter "v", that is, the distance between the two catching grooves 330 is gradually increased from one end to the other end.

Further, the adjusting part 30 may further include an elastic connecting part 34, wherein the adjusting part 33 is mounted to the head support part 10 and is elastically supported to the elastic connecting part 34.

The elastic connection member 34 is located in the movable direction of the adjustment member 33. When the adjusting member 33 moves from the first position to the second position, the elastic connection member 34 is further compressed. When the adjusting member 33 moves from the second position to the first position, the pressing force applied to the elastic connecting member 34 is reduced compared to the prior art.

The adjusting member 33 can be elastically supported at the first position by the elastic connecting member 34. When the user applies a force to the head support 10 to pull the head support 10 outward, the adjusting member 33 can be adjusted to the second position. When the user releases his hand, the adjusting member 33 can be automatically returned to the first position by the elastic connecting member 34.

In more detail, the adjusting portion 30 further includes an adjusting portion mounting housing 35, wherein the adjusting portion mounting housing 35 forms a mounting space 350, wherein the adjusting member 33 is received in the mounting space 350 of the adjusting portion mounting housing 35 of the head support portion 10, and the end portion of the head support portion 10 is movably inserted into the adjusting portion mounting housing 35. The fixing base 322 of the inner rotor 32 is fixedly mounted to the adjuster mounting case 35, and is connected to the head support 10 via the adjuster mounting case 35. The adjuster 33 is located between the inner rotating member 32 and the adjuster mounting housing 35.

The adjuster 33 is attached to the adjuster mounting housing 35 and to the head support 10. The adjusting member 33 can be moved by the head support 10 to move synchronously.

The elastic connecting member 34 has a first connecting end 341 and a second connecting end 342 corresponding to the first connecting end 341, wherein the first connecting end 341 of the elastic connecting member 34 is abutted against the mounting seat 333 of the adjusting member 33 or is connected to the mounting seat 333 of the adjusting member 33. The second connecting end 342 of the elastic connecting element 34 is adapted to be abutted against the adjusting part mounting housing 35 of the head supporting part 10. That is, the elastic connector 34 is located between the adjuster mounting housing 35 of the head support 10 and the adjuster 33. Since the head support 10 can drive the elastic connecting element 34 to move together, for example, move outward, in the process, the distance between the adjusting element 33 and the adjusting element mounting housing 35 of the head support 10 is shortened, so that the elastic connecting element 34 is squeezed, and therefore, when the head support 10 no longer carries the adjusting element 33 to move outward, the squeezed elastic connecting element 34 can naturally stretch to reset the adjusting element 33.

It should be noted that the reset adjusting member 33 can then drive the head support 10 to reset.

It is understood that, in the embodiment, the inner rotating member 32 is mounted on the head support 10, and the adjusting member 33 is configured to be coupled with the head support 10. According to another embodiment of the present invention, the inner rotating member 32 may be mounted to the supporting portion 20, and the adjusting member 33 may be provided to be interlocked with the supporting portion 20, and the switching between the adjusted state and the free state may be performed by pulling the supporting portion 20.

As for the adjusting member 33, the head support 10 is formed with a guide groove 101, wherein the mounting seat 333 of the adjusting member 33 is mounted to the guide groove 101 and can move back and forth along the guide groove 101. The guide groove 101 can guide the moving direction of the adjusting member 33, so that the inner rotating member 32 can be released when the adjusting member 33 moves outward to the second position, and the inner rotating member 32 can be pressed against the outer rotating member 31 again when the adjusting member 33 moves inward to the first position.

It is noted that according to one embodiment of the invention, the adjustment member 33 is arranged to be electrically driven, so that after operation by a user, the adjustment member 33 can be automatically switched between the first position and the second position, for example by the user pressing a button to switch the lightweight neck brace 1 between the adjusted state and the free state.

Further, the head support portion 10 includes a first support arm 11 and a second support arm 12, wherein the first support arm 11 is rotatably connected to the first support arm 21 of the support portion 20 by one of the adjusting portions 30, and the second support arm 12 is rotatably connected to the second support arm 22 of the support portion 20 by the other of the adjusting portions 30. The first bearing arm 11 is pivotably connected to the second bearing arm 12. The first support arm 21 is pivotally connected to the second support arm 22. It is not shown for the moment in fig. 1 to 6 that the first supporting arm 11 can be folded towards the second supporting arm 12, as can be seen with reference to fig. 7.

When the head support 10 is folded towards the support 20, the first support arm 11 can be folded towards the second support arm 12, while the first support arm 21 can be folded towards the second support arm 22, so that the entire lightweight brace 1 can be stored to a smaller size.

It is noted that the first support arm 21 and the second support arm 22 form an angle therebetween and the angle can be fixed in the adjusted position, and the first support arm 11 and the second support arm 12 form an angle therebetween and the angle can be fixed in the adjusted position, so that the lightweight cervical collar 1 can be adapted to users of different sizes, for example, users with different head sizes.

Further, with continued reference to fig. 1-6, the lightweight brace 1 includes a securing portion 40, wherein the securing portion 40 is disposed on the head support 10 to assist in securing the head support 10. In this embodiment, the head support 10 is supported at a chin position of the head, and the head support 10 does not completely surround the head, or leaves a space for the user to wear. The fixing portion 40 is provided to the head support 10 and can extend between two spaced apart ends of the head support 10, thereby better fixing the head support 10 to the head. The head support 10 and the fixing part 40 can together form a size-adjustable wearing channel 100, so that the lightweight neck brace 1 can be adapted to users with different head sizes.

The fixing portion 40 may be, but is not limited to, a fixing portion 40 member implemented as a band, a band with a hook and loop fastener, or a string.

The fixing part 40 may be accommodated in the adjusting part 30, and the fixing part 40 may be pulled out from the adjusting part 30 when the fixing part 40 needs to be used.

Further, the lightweight neck brace 1 includes a functional part 50, wherein the functional part 50 is provided to the head support part 10, and when the head support part 10 is supported on the jaw of the user, the functional part 50 can be fitted to the jaw of the user and can support the jaw of the user. The functional part 50 may have a massage function for the lower jaw, and the functional part 50 may be provided with protrusions or particles to have a massage function. The functional part 50 may also be provided to be vibratable, and an associated power supply accessory may be mounted in the head support 10.

The functional portion 50 may be configured to be resilient to allow fine adjustment of the head position of the user. For example, when the weight of the head of the user is large, the functional portion 50 is deformed largely, and when the weight of the head of the user is small, the functional portion 50 is deformed less. The functional part 50 may be implemented in the form of plastic, sponge, cloth bag filled with particles, etc.

Referring to fig. 8, another embodiment of the lightweight neck brace 1 according to the present invention is illustrated. The present embodiment is different from the embodiment illustrated in fig. 1 to 6 mainly in that the adjusting part 30, and in the present embodiment, the adjusting part 30 is implemented as a torsion spring which is connected to the head support part 10 and the support part 20, respectively.

The head support portion 10 is supported on the support portion 20 by the adjusting portion 30, and the torsion spring has two extending arms that are opened, and an included angle between the two extending arms cannot be further reduced within a certain angle range under the action of its own elasticity. When the user wears the light neck brace 1, the head support part 10 and the support part 20 respectively apply an acting force to the adjusting part 30, for example, the gravity of the head, so that the included angle between the two extension arms of the torsion spring is reduced, and once the two extension arms of the torsion spring are reduced to a certain range, the user cannot continuously move the head downwards, that is, the user cannot lower the head.

When the user wants to adjust the lightweight collar 1, the user can only adjust the lightweight collar 1 upwards to enable the two extending arms of the torsion spring to expand. That is, the head support portion 10 of the lightweight neck brace 1 can be unidirectionally adjusted with respect to the support portion 20, and can be unidirectionally adjusted toward a direction away from the support portion 20.

According to another aspect of the invention, the invention provides a method of adjusting the lightweight neck brace 1, wherein the method of adjusting comprises the steps of:

the head support part 10 and the support part 20 of the light weight neck brace 1 are changed between the adjusted state and the free state by the outer rotation piece 31 and the inner rotation piece 32 of the adjusting part 30 of the light weight neck brace 1, wherein the head support part 10 and the support part 20 of the light weight neck brace 1 are rotatably connected by the adjusting part 30, the head support part 10 is adapted to support a head and is supported by the support part 20, the support part 20 is adapted to be supported by a trunk, when the inner rotation piece 32 is engaged with the outer rotation piece 31, the light weight neck brace 1 is in the adjusted state, the head support part 20 of the light weight neck brace 1 can rotate in one direction toward a direction away from the support part 20 but cannot rotate in a direction close to the support part 20, when the inner rotation piece 32 is disengaged from the outer rotation piece 31, the lightweight brace 1 is in the free state, and the head support 20 can be rotated arbitrarily towards or away from the support 20.

According to an embodiment of the invention, in the above method, the position of the inner rotating member 32 is controlled by the adjusting member 33, and the lightweight neck brace 1 can be changed from the adjusted state to the free state by pulling the adjusting member 33.

According to one embodiment of the invention, in the above method, the position of the inner rotating member 32 is controlled by the adjusting member 33, and when the adjusting member 33 is released, the lightweight neck brace 1 is automatically changed from the free state to the adjusted state.

According to one embodiment of the invention, in the above method, the head is massaged by the head support 10.

According to an embodiment of the invention, in the above method, the angle formed by the first and

second support arms

11, 12 of the head support 10 is changed to accommodate heads of different sizes.

According to an embodiment of the present invention, the connecting arm 321 of the inner rotating member 32 is controlled by the adjusting member 33, in the adjusting state, the connecting arm 321 is controlled to be pressed into the one-way tooth socket 311 of the outer rotating member 31 in a single row so as to enable the outer rotating member 31 and the inner rotating member 32 to rotate in one direction, and in the free state, the connecting arm 321 is controlled to be separated from the one-way tooth socket 311 of the outer rotating member 31 so as to enable the outer rotating member 31 and the inner rotating member 32 to rotate freely.

According to an embodiment of the present invention, the inner rotating member 32 is controlled by changing the position of the adjusting member 33, when the adjusting member 33 is at the first position, the adjusting state is achieved, and when the adjusting member 33 moves to the second position, the connecting arm 321 of the inner rotating member 32 is driven to be disengaged from the outer rotating member 31, thereby achieving the free state.

According to an embodiment of the present invention, the adjusting member 33 is controlled by pulling the head support 10 to control the inner rotating member 32, when the head support 10 is pulled outward, the adjusting member 33 is brought to the first position, which is in the adjusting state, and when the force applied to the adjusting member 33 by the head support 10 is weakened or disappeared, the adjusting member 33 can be returned to the first position.

According to an embodiment of the present invention, the adjusting member 33 is controlled by pulling the supporting portion 20 to control the inner rotating member 32, when the supporting portion 20 is pulled outward, the adjusting member 33 is brought to the first position, and is in the adjusting state, and when the force applied to the adjusting member 33 by the supporting portion 20 is weakened or disappears, the adjusting member 33 can be returned to the first position.

According to an embodiment of the present invention, the adjusting member 33 located at the first position can be automatically reset to the second position, and can drive the head support 10 to reset.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A lightweight neck brace adapted to support a head on a torso, comprising:

a head support, wherein the head support is adapted to support the head;

a supporting portion, wherein the supporting portion is connected to the head supporting portion, and the supporting portion is adapted to be supported on the trunk so as to support the head supporting portion on the trunk by the supporting portion; and

at least one adjusting part, wherein the adjusting part is located at the joint of the head supporting part and the supporting part, and by means of the adjusting part, the head supporting part is connected to the supporting part in a folding manner towards the supporting part, so that the size of an included angle between the head supporting part and the supporting part can be adjusted, wherein the light neck brace has an adjusting state in which the head supporting part is allowed to be adjusted in a one-way direction away from the supporting part.

2. The lightweight neck brace of claim 1, wherein the lightweight neck brace has a free state and is operable to be transitioned between the adjusted state and the free state in which the head support portion is permitted to be adjusted in either one of a direction away from the support portion and a direction toward the support portion.

3. The lightweight neck brace according to claim 1, wherein said adjusting portion includes an outer rotating member mounted to said head receiving portion and an inner rotating member mounted to said supporting portion, wherein an inner wall of said outer rotating member surrounds to form a receiving space in which said inner rotating member is received, wherein an inner wall of said outer rotating member is recessed to form at least two unidirectional splines, said inner rotating member includes at least one connecting arm integrally extended outwardly from said receiving space to allow said connecting arm to be deformed after being applied with force and to be restored after the pressure is removed, and a fixing base, wherein said connecting arm is formed with a supporting surface capable of being pressed against said unidirectional splines of said outer rotating member to lock said outer rotating member and said inner rotating member, in the adjustment state, the connecting arm is pressed and selectively pressed against one of the one-way tooth grooves of the outer rotating member, so that the inner rotating member is limited to only be capable of one-way rotation relative to the outer rotating member.

4. The lightweight neck brace according to claim 2, wherein said adjusting portion includes an outer rotating member mounted to said head receiving portion and an inner rotating member mounted to said supporting portion, wherein an inner wall of said outer rotating member surrounds to form a receiving space in which said inner rotating member is received, wherein an inner wall of said outer rotating member is recessed to form at least two unidirectional splines, said inner rotating member includes at least one connecting arm integrally extended outwardly from said receiving space to allow said connecting arm to be deformed after being applied with force and to be restored after the pressure is removed, and a fixing base, wherein said connecting arm is formed with a supporting surface capable of being pressed against said unidirectional splines of said outer rotating member to lock said outer rotating member and said inner rotating member, in the adjustment state, the connecting arm is pressed and selectively pressed against one of the one-way splines of the outer rotating member so that the inner rotating member is restrained to be rotatable only in one direction relative to the outer rotating member, and in the free state, the connecting arm of the inner rotating member is released from the one-way splines of the outer rotating member so that the rotational directions of the inner rotating member and the outer rotating member are free.

5. The lightweight neck brace according to claim 1, wherein said adjusting portion includes an outer rotating member and an inner rotating member, wherein said outer rotating member is mounted to said supporting portion, said inner rotating member is mounted to said head supporting portion, wherein an inner wall of said outer rotating member surrounds to form a receiving space in which said inner rotating member is received, wherein an inner wall of said outer rotating member is recessed to form at least two unidirectional splines, said inner rotating member includes at least one connecting arm and a fixing base, wherein said connecting arm extends integrally outwardly from said fixing base to be suspended to allow said connecting arm to be deformed after being applied with force and to be restored after the pressure is removed, wherein said connecting arm is formed with a supporting surface and said supporting surface can be pressed against said unidirectional splines of said outer rotating member to lock said outer rotating member and said inner rotating member, in the adjustment state, the connecting arm is pressed and selectively pressed against one of the one-way tooth grooves of the outer rotating member, so that the inner rotating member is limited to only be capable of one-way rotation relative to the outer rotating member.

6. The lightweight neck brace according to claim 2, wherein said adjusting portion includes an outer rotating member and an inner rotating member, wherein said outer rotating member is mounted to said supporting portion, said inner rotating member is mounted to said head supporting portion, wherein an inner wall of said outer rotating member surrounds to form a receiving space in which said inner rotating member is received, wherein an inner wall of said outer rotating member is recessed to form at least two unidirectional splines, said inner rotating member includes at least one connecting arm and a fixing base, wherein said connecting arm extends integrally outwardly from said fixing base to be suspended to allow said connecting arm to be deformed after being applied with force and to be restored after the pressure is removed, wherein said connecting arm is formed with a supporting surface and said supporting surface can be pressed against said unidirectional splines of said outer rotating member to lock said outer rotating member and said inner rotating member, in the adjustment state, the connecting arm is pressed and selectively pressed against one of the one-way splines of the outer rotating member so that the inner rotating member is restrained to be rotatable only in one direction relative to the outer rotating member, and in the free state, the connecting arm of the inner rotating member is released from the one-way splines of the outer rotating member so that the rotational directions of the inner rotating member and the outer rotating member are free.

7. The lightweight neck brace as claimed in any one of claims 2 to 6, wherein the number of said connecting arms of said inner rotating member is two and is arranged centrally symmetrically to said fixed base.

8. The lightweight neck brace according to any one of claims 2 to 6, wherein the adjusting portion further comprises an adjusting member having at least one position-limiting groove, wherein the connecting arm of the inner rotating member is formed with a position-limiting post extending to the position-limiting groove of the adjusting member to position the inner rotating member by the adjusting member, in the adjusting state, the position-limiting member presses the supporting surface of the connecting arm against the one-way tooth groove to limit the outer rotating member and the inner rotating member from rotating in one direction, in the free state, the position-limiting member limits the connecting arm to form a space between the supporting surface and the one-way tooth groove, and the lightweight neck brace can be changed between the adjusting state and the free state by adjusting the adjusting member.

9. The lightweight neck brace according to claim 7, wherein each of said connecting arms of said inner rotating member forms a stopper post, wherein said adjusting portion further comprises an adjusting member, said adjusting member forms two symmetrically arranged stopper grooves, the distance between said stopper grooves is set to gradually increase from one end to the other end, said stopper post of said connecting arm is stopped at said stopper groove of said adjusting member, when said adjusting member moves relative to said inner rotating member and said stopper post moves from the end of said adjusting member where the distance between said stopper grooves is the largest toward the end where the distance is the smallest, the distance between said stopper posts is restrained by said stopper grooves of said adjusting member to decrease, said connecting arm is driven by said adjusting member to approach toward said fixing base and to be away from said one-way tooth groove of said outer rotating member, whereby the lightweight brace changes from the adjusted state toward the free state.

10. The light-weight neck brace according to claim 8, wherein said adjusting portion further comprises an adjusting portion mounting case and an elastic connecting member, wherein said adjusting portion mounting case forms a mounting space, said adjusting member is located in said mounting space, said elastic connecting member is located between said adjusting member and said adjusting portion mounting case, said head bearing portion is movably inserted in said adjusting portion mounting case back and forth, said adjusting member can be driven by said head bearing portion to move outward when said head bearing portion is pulled outward, and said elastic connecting member is pressed at the same time, so that said connecting arm of said inner rotating member can be released from said outer rotating member to become said free state, and said adjusting member automatically resets under the action of said elastic connecting member when the acting force applied to said head bearing portion disappears, to become the adjusted state.

11. The light-weight neck brace according to claim 9, wherein said adjusting portion further comprises an adjusting portion mounting case and an elastic connecting member, wherein said adjusting portion mounting case forms a mounting space, said adjusting member is located in said mounting space, said elastic connecting member is located between said adjusting member and said adjusting portion mounting case, said head bearing portion is movably inserted in said adjusting portion mounting case back and forth, said adjusting member can be driven by said head bearing portion to move outward when said head bearing portion is pulled outward, and said elastic connecting member is pressed at the same time, so that said connecting arm of said inner rotating member can be released from said outer rotating member to become said free state, and said adjusting member automatically resets under the action of said elastic connecting member when the acting force applied to said head bearing portion disappears, to become the adjusted state.

12. The lightweight neck brace according to any one of claims 1 to 6, wherein said lightweight neck brace further comprises a length adjustable securing portion, wherein said securing portions extend between respective ends of said head support portion to form a wear channel of adjustable size.

13. The lightweight neck brace according to any one of claims 1 to 6, wherein said lightweight neck brace further comprises a functional portion, wherein said functional portion is provided to said head support portion and has elasticity for adjusting the relative position of said head support portion and head.

14. The lightweight neck brace of any of claims 1 to 6, wherein said head support includes a first support arm and a second support arm, wherein said first support arm is pivotally connected to said second support arm to be folded towards said second support arm.

15. The lightweight neck brace according to any one of claims 1 to 6, wherein said support portion includes a first support arm and a second support arm, wherein said first support arm and said second support arm extend outwardly from both ends of said head support portion to said first support arm and said second support arm are connected to each other to enable a stable triangular support structure to be formed, wherein the number of said adjustment portions is two, respectively, and two of said adjustment portions are located at the junction of said head support portion and said first support arm and said second support arm of said support portion, wherein said first support arm of said support portion is pivotably connected to said second support arm to be folded toward said second support arm.

16. The method for adjusting the light neck brace is characterized by comprising the following steps:

pulling an adjustment portion of a light-weight neck brace to disengage the light-weight neck brace in an adjustment state in which a head support portion of the light-weight neck brace is permitted to be unidirectionally adjusted in a direction away from a support portion adapted to be supported on the head, the support portion adapted to be supported on the torso.

17. The adjustment method according to claim 16, further comprising the steps of:

after releasing the adjusting portion, automatically resetting the adjusting portion so that an inner rotating member is unidirectionally rotatably abutted against an outer rotating member, whereby the head bearing portion and the supporting portion respectively connected to the outer rotating member and the inner rotating member are allowed to be unidirectionally adjusted.

18. The adjustment method according to claim 17, further comprising the steps of:

after the head part is abutted against the head bearing part, the relative position of the head part and the head bearing part is adjusted by the deformation of a functional part, wherein the functional part is arranged on the head bearing part to support the head part.

19. The adjusting method according to claim 16, wherein in the above method, by pulling the adjusting portion to release an inner rotating member of the adjusting portion from an outer rotating member of the adjusting portion, the inner rotating member is originally engaged with the outer rotating member in a one-way rotatable manner, so as to allow the size of the included angle formed between the head supporting portion and the supporting portion respectively connected to the outer rotating member and the inner rotating member to be freely adjusted.

20. The adjustment method according to claim 16, wherein in the above method, an adjustment member of the adjustment portion is pulled to change a relative position of a connecting arm of an inner rotating member and the outer rotating member, wherein the connecting arm is unidirectionally rotatably pressed against a unidirectional spline of the outer rotating member.