阅读说明：本技术 一种自卷曲缓冲装置及其制造方法 (Self-curling buffer device and manufacturing method thereof ) 是由 张志强 宋亮 裴葆青 胡大勇 武雪晴 肖译林 于 2020-12-16 设计创作，主要内容包括：本发明涉及抗冲击缓冲防护领域,公开了一种自卷曲缓冲装置,其包括：基础部,卷曲机构和锁合机构,其中卷曲机构包括卷曲始端、卷曲段和卷曲末端,锁合机构包括安装部和活动部,卷曲末端和安装部固定连接在基础部上,在压缩状态时,活动部压缩卷曲始端,使卷曲机构呈平面结构,当自卷曲缓冲装置收到冲击后,活动部活动,释放卷曲始端,卷曲段弯折,起到缓冲作用,减弱冲击带来的伤害。(The invention relates to the field of impact-resistant buffer protection, and discloses a self-curling buffer device, which comprises: the base part, crimping mechanism and locking mechanical system, wherein crimping mechanism includes curling top, curling section and curling end, and locking mechanical system includes installation department and movable part, curls end and installation department fixed connection on the base part, and when compression state, the curling top of movable part compression makes crimping mechanism be planar structure, and after the buffer that curls received the impact, the movable part activity released the curling top, and the curling section is buckled, plays the cushioning effect, weakens the injury that the impact brought.)

1. A self-curling array cushioning device, comprising:

the curling mechanism comprises a curling starting end, a curling section and a curling tail end, and the curling tail end is fixedly connected to the base part; the locking mechanism comprises an installation part and a movable part, the installation part is fixedly connected to the base part, and the movable part is movably connected to the installation part;

in a compressed state, the curl initiation end is positioned between the base portion and the movable portion, and the base portion and the curl initiation end are in contact;

after the movable portion is separated from the curling starting end, the curling structure is in a releasing state, and the curling section is curled in the releasing state.

2. A self-curling cushioning device according to claim 1, wherein one of said curl tips is provided with one or more of said curl segments, while one of said curl tips is provided with one or more of said curl starts, wherein said curl segments and said curl starts are in one-to-one correspondence.

3. A self-curling cushioning device according to claim 2, wherein said curling mechanism is a unitary structure and said curling mechanism is constructed from one or more layers of material.

4. A self-curling cushioning device according to claim 1, wherein said curling mechanisms are distributed in an array on said base portion.

5. A self-curling cushioning device according to claim 1, wherein said locking mechanism further comprises a trigger for changing the configuration of said movable portion.

6. A self-curling cushioning device according to claim 5, wherein said locking mechanism is provided as a smart material.

7. A self-curling cushioning device according to claim 6, wherein said locking mechanism is provided as a smart material, in particular:

the intelligent material is set as a memory material.

8. A self-curling cushioning device according to claim 7, wherein said movable portion is movably connected to said mounting portion, in particular:

one side of the movable part is movably connected with one side of the mounting part, and the movable part is bent relative to the connecting side.

9. A self-curling cushioning device according to claim 7, wherein said movable portion is movably connected to said mounting portion, in particular:

the movable part is of a rhombic fence structure and is telescopically and movably connected to the mounting part.

10. A self-curling cushioning device according to claim 6, wherein a controller is connected to said locking mechanism, said controller being adapted to actuate said trigger.

11. A self-curling cushioning device according to claim 10, wherein said locking mechanism is connected to said controller by a flexible wire, and said base portion has a recess formed in a surface thereof for receiving said flexible wire.

12. A self-curling cushioning device according to claims 1-11, further comprising a method of making said self-curling cushioning device:

s1, manufacturing the base part with preset size and shape by adopting a structure forming mode;

s2, selecting materials with various elastic moduli, cutting the materials to a preset size, uniformly stretching the cut materials by a certain deformation amount, and bonding the materials to obtain the crimping mechanism;

s3, manufacturing the locking mechanism with preset size and shape by adopting a structural forming mode;

s4, fixing the processed curling tail end of the curling mechanism and the mounting part of the locking mechanism on the base part in a fixed connection mode;

and S5, installing a controller, connecting the trigger part on the base layer with the controller by using a flexible wire, scribing a groove on the base layer, arranging all the flexible wires in the groove, extending the curling initial ends of all the curling mechanisms below the movable part, and adjusting the curling initial ends to be in a closed state to obtain the self-curling buffer device.

Technical Field

The invention relates to the technical field of impact-resistant buffer protection, in particular to a self-curling buffer device and a manufacturing method thereof.

Background

At present, various impact-resistant buffering protective devices are widely applied to the fields of transportation, rehabilitation engineering, sports, aerospace, anti-terrorism and anti-riot and the like so as to ensure the safety of people or equipment. Existing impact protection devices can be broadly divided into passive cushioning devices and active cushioning devices.

In the case of active damping devices, airbag-type damping devices are most typical at present. For example, patent document [ CN 103040547 a ] discloses a hip joint protection airbag for elderly people driven by compressed gas. The automobile human body protection airbag generally adopts a chemical explosion inflation mode of initiating explosive devices to buffer the collision impact force of the automobile. The active buffer device must use a high-pressure gas storage bottle or an initiating explosive device when driving the air bag to rapidly inflate, and the active buffer device appears to react too violently when protecting people or precision equipment and has certain safety risk.

In the invention of the passive buffer device, the traditional flexible materials such as polyurethane foam, silica gel pads, sponge and the like are mainly adopted at present. In order to achieve the required cushioning protection effect when an impact collision occurs, designers have to design flexible protection devices such as sponges, foams, honeycomb structures and the like to be large enough and thick enough. However, when the size and weight of the buffer protection device are strictly limited, designers can only reduce or thin the flexible protection devices, which undoubtedly reduces the buffer protection efficiency of the flexible protection devices and cannot meet the due buffer protection requirement.

In summary, how to design a small, light, safe and reliable buffer protection device without reducing the buffer protection capability is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above problems, the present invention provides a self-curling cushioning device, including: the base part, crimping mechanism and locking mechanical system, wherein crimping mechanism includes curling top, curling section and curling end, and locking mechanical system includes installation department and movable part, curls end and installation department fixed connection on the base part, and when compression state, the curling top of movable part compression makes crimping mechanism be planar structure, and after the buffer that curls received the impact, the movable part activity released the curling top, and the curling section is buckled, plays the cushioning effect, weakens the injury that the impact brought.

In some embodiments of the present application, a self-curling cushioning device is disclosed, comprising: the curling mechanism comprises a curling starting end, a curling section and a curling tail end, and the curling tail end is fixedly connected to the base part; the locking mechanism comprises an installation part and a movable part, the installation part is fixedly connected to the base part, and the movable part is movably connected to the installation part; in a compressed state, the curl initiation end is positioned between the base portion and the movable portion, and the base portion and the curl initiation end are in contact; after the movable portion is separated from the curling starting end, the curling structure is in a releasing state, and the curling section is curled in the releasing state.

In some embodiments of the present application, one of the crimp tips is provided with one or more of the crimp sections, while one of the crimp tips is provided with one or more of the crimp starts, wherein the crimp sections and the crimp starts are in one-to-one correspondence.

In some embodiments of the present application, the crimping mechanism is a unitary structure and the crimping mechanism is constructed from one or more layers of material.

In some embodiments of the present application, the crimping mechanisms are distributed in an array on the base portion.

In some embodiments of the present application, the locking mechanism further comprises a trigger for changing the structural state of the movable portion.

In some embodiments of the present application, the locking mechanism is configured as a smart material, specifically: the intelligent material is set as a memory material.

In some embodiments of the present application, the movable portion is movably connected to the mounting portion, specifically: one side of the movable part is movably connected with one side of the mounting part, and the movable part is bent relative to the connecting side.

In some embodiments of the present application, the movable portion is movably connected to the mounting portion, specifically: the movable part is of a rhombic fence structure and is telescopically and movably connected to the mounting part.

In some embodiments of the present application, a controller is coupled to the closure mechanism for actuating the trigger.

In some embodiments of the present application, the locking mechanism is connected to the controller through a flexible wire, and a groove is formed on a surface of the base portion for placing the flexible wire.

In some embodiments of the present application, there is also included a method of manufacturing the self-curling cushioning device:

s1, manufacturing the base part with preset size and shape by adopting a structure forming mode;

s2, selecting materials with various elastic moduli, cutting the materials to a preset size, uniformly stretching the cut materials by a certain deformation amount, and bonding the materials to obtain the crimping mechanism;

s3, manufacturing the locking mechanism with preset size and shape by adopting a structural forming mode;

s4, fixing the processed curling tail end of the curling mechanism and the mounting part of the locking mechanism on the base part in a fixed connection mode;

and S5, installing a controller, connecting the trigger part on the base layer with the controller by using a flexible wire, scribing a groove on the base layer, arranging all the flexible wires in the groove, extending the curling initial ends of all the curling mechanisms below the movable part, and adjusting the curling initial ends to be in a closed state to obtain the self-curling buffer device.

According to the self-curling buffer device provided by the invention, when the self-curling buffer device is in a compressed state, the locking mechanism compresses the curling mechanism, so that the phenomenon that the curling mechanism occupies redundant space and influences the use of the self-curling buffer device is avoided.

Drawings

FIG. 1 is a block diagram of a self-curling cushioning device in a compressed state according to an embodiment of the present invention;

FIG. 2 is a block diagram of a self-curling cushioning device in a relaxed state, according to an embodiment of the present invention;

FIG. 3 is a detail view at A of FIG. 2 in an embodiment of the present invention;

FIG. 4 is a structural view of a curling mechanism in a compressed state in embodiment 1-2 of the invention;

FIG. 5 is a block diagram of 1-2 crimping mechanisms in a released state according to an embodiment of the present invention;

FIG. 6 is a plan view of a self-curling cushioning device in a compressed state according to example 2-2 of the present invention;

FIG. 7 is a plan view of a self-curling cushioning device in a released state according to example 2-2 of the present invention;

fig. 8 is a diagram of the profile of the trigger portion and the controller of the self-curling cushioning device in an embodiment of the invention.

In the figure, 100, the base; 200. a crimping mechanism; 210. a curl initiation end; 220. a curled segment; 230. crimping the end; 300. a locking mechanism; 310. a movable portion; 320. an installation part; 330. a trigger section; 400. and a controller.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the present application, the direction or positional relationship indicated by "inner" is the side closer to the geometric center of the material handling apparatus based on the drawings, and the direction or positional relationship indicated by "outer" is the side away from the geometric center of the material handling apparatus based on the drawings.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "plurality" or "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

In some embodiments of the present application, as shown in fig. 1, a self-curling cushioning device includes a base 100, a curling mechanism 200, and a locking mechanism 300.

In some embodiments of the present application, as shown in fig. 2, the curling mechanism 200 includes a curling starting end 210, a curling section 220 and a curling end 230, the curling mechanism 200 is an integrated structure, when the locking mechanism 300 is released, the curling mechanism 200 is in a released state, the curling end 230 is connected with the base 100, the curling section 220 is bent, the curling starting end 210 of the curling mechanism 200 is a free end, the curling starting end 210 is connected with the curling end 230 through the curling section 220, and the cross-sectional shape of the curling section 220 is an arc; when the curl leading end 210 is pressed by the mechanism of the locking mechanism 300, the curling mechanism 200 is unfolded in the opposite direction of the curl to form a planar structure, and at this time, the deformation of the curling portion mechanism is within the range of the elastic deformation of the constituent material. The present invention is primarily directed to the crimping stage 220 and the crimp initiation 210 of the crimping mechanism 200 in two embodiments:

example 1-1:

as shown in fig. 1, when the curling mechanism 200 is pressed to be a plane structure, the plane structure is a rectangle, one end of the rectangle is the curling end 230, the curling end 230 is fixedly connected to the base part 100, the rectangle has a curling tendency along the normal direction of the curling end 230, the locking mechanism 300 presses the curling start end 210, as shown in fig. 2, when the curling start end 210 is released, the curling part curls towards the direction having the curling tendency, at this time, the curling mechanism 200 is a released elastic structure, so that the buffering effect is achieved, and when the self-curling buffering device is installed and impacts occur, the elasticity of the curling mechanism 200 reduces the acting force, so that the buffering is achieved.

Examples 1 to 2:

as shown in fig. 4, when the curling mechanism 200 is pressed to be a plane structure, the plane structure is a cross-shaped plane structure, the center of the cross-shaped structure is the curling end 230, the curling end 230 is fixedly connected to the base 100, the locking mechanism 300 presses four curling starting ends 210, the four curling starting ends 210 all have the tendency of curling towards the center of the cross-shaped structure, namely the curling end 230, as shown in fig. 5, when the curling part is released, the four pressed curling starting ends 210 are released at the same time, the four curling starting ends 210 curl towards the direction with the curling tendency, at this time, the curling mechanism 200 is a released elastic structure, thereby having a buffering effect, and when an impact occurs, the elasticity of the curling structure buffers to reduce the acting force.

It should be noted that, in various application scenarios, when the direction of the impact force source is unpredictable, the impact force may come from various directions, and when the curling mechanism 200 is set in the shape of a cross, the forces in the various directions can be buffered, so that the situation that the impact force comes from the side direction of the curling mechanism 200 and cannot play a role in buffering is avoided.

In the above embodiments, although one crimping section 220 and crimp start 210 or four crimping sections 220 and crimp start 210 are provided in one crimping mechanism 200, it is merely proposed as an example that three or more crimping sections 220 and crimp start 210 may be formed to satisfy various buffering effects if necessary.

In some embodiments of the present application, a crease is provided on the inward curling side of the curled segment 220, and when the curled segment 220 changes from a planar structure to a curled state, the surface area of the inner side of the curled segment 220 is reduced, so as to increase the bending resistance by providing the crease.

In some embodiments of the present application, the curling mechanism 200 is configured as a multi-layer structure, and each layer of the structure is a unitary structure, in one embodiment of the present application, the curling mechanism 200 is configured as a double-layer structure composed of a super-elastic thin film with a smaller elastic modulus and a flexible thin material with a larger elastic modulus, the two layers of materials are connected together by adhesion, in other embodiments of the present application, the number and material of the layers of the curling structure are not limited, and any one or more layers of the curling structure belong to the protection scope of the present application.

It should be noted that, in various application scenarios, different requirements are imposed on the curling degree of the curling mechanism 200, meanwhile, a material with a smaller elastic modulus is required to ensure that the deformation of the curling mechanism 200 is sufficient to meet the buffering requirement, and a material with a larger elastic modulus is also required to ensure the stability of the curling mechanism 200, and materials with various elastic moduli are selected to be installed in a matched manner, so that the phenomenon that the curling mechanism 200 deforms less under a larger impact force and cannot play a buffering role is avoided, and the phenomenon that the elastic modulus is smaller and only plays a buffering role within a smaller large impact force range is also avoided.

In some embodiments of the present application, as shown in fig. 3 and 8, the locking mechanism 300 includes a mounting portion 320, a movable portion 310 and a triggering portion 330, the mounting portion 320 and the movable portion 310 are configured as memory materials, the triggering portion 330 is an electric heating component, and the controller 400 is connected to the triggering portion 330 through a flexible wire, and there are two main solutions for the embodiment of the locking mechanism 300 of the present invention:

example 2-1:

as shown in fig. 3, the mounting portion 320 and the movable portion 310 are made of memory metal sheets with a blocking sheet structure, when the mounting portion 320 and the movable portion 310 are in a normal state, the mounting portion 320 and the movable portion 310 are in a planar structure, the movable portion 310 is disposed on the upper surface of the curling mechanism 200 and used for pressing the curling structure, the mounting portion 320 is connected to the base portion 100, the trigger portion 330 is disposed on the upper surface of the mounting portion 320, the trigger portion 330 is made of a resistance wire, the resistance wire is connected to the controller 400 through a flexible wire, when the controller 400 sends an electric signal through the wire, the temperature of the resistance wire rises, the temperature of the memory material rises, the memory material deforms, the movable portion 310 tilts, the curling mechanism 200 releases the curl, and a buffering effect.

Examples 2 to 2

As shown in fig. 6, the movable portion 310 is a diamond fence structure surrounded by memory metal wires, the mounting portion 320 is a last fence of the diamond fence structure and is fixedly connected to the base portion 100, when the locking mechanism 300 is in a compressed state, the movable portion 310 is pressed on the upper surface of the curled portion, the triggering portion 330 is a resistance wire, the resistance wire is in the same shape as the memory metal wires and is wound on the memory metal wires, and the resistance wire is connected with the controller 400 through flexible wires, as shown in fig. 7, when the controller 400 sends an electric signal through the wires, the temperature of the resistance wire rises, the temperature of the memory material rises, the memory material deforms, the diamond fence structure is compressed, the release of the curling starting end 210 is realized, and the curling portion 220 curls to play a role of buffering.

It should be noted that, under the condition of most of the required buffering, the speed of the impact force is very fast, the triggering part 330 also needs to heat the movable part 310 fast, so that the movable part 310 deforms, and the crimping mechanism 200 realizes the buffering effect, therefore, the heating resistance wire is wound and connected on the memory metal wire, the heating speed of the memory metal wire is greatly increased, meanwhile, the memory metal wire is bent into a rhombic fence structure, so that the deformation of the memory metal wire is limited in the plane range, and the buffer effect is prevented from being influenced when the movable part 310 tilts.

In the above embodiment, although the flap structure or the rhombic fence structure is provided in the movable portion 310, it is only mentioned as an example, and other structures may be formed to satisfy the effect of releasing the curling mechanism 200 if necessary.

The smart material is a novel functional material that can sense external stimuli, can determine and appropriately process and can be executed by itself, in some embodiments of the present application, the locking mechanism 300 may be configured as one of a magnetostrictive material, an electro-polymer material, a piezoelectric material or a memory material to realize the activity of the locking mechanism 300, the corresponding triggering portion 330 may be configured as one of magnetic field excitation, electrical excitation, temperature excitation, acoustic wave excitation and optical excitation to match with the smart material that constitutes the mounting portion 320 and the active portion 310, in other embodiments of the present application, the specific type of the smart material is not limited, and the configuration of the locking mechanism 300 as any smart material falls within the protection scope of the present application.

In some embodiments of the present application, the granular protrusions are provided on the surface of the movable portion 310 contacting the curl initiation end 210 to increase the friction between the movable portion 310 and the curl initiation end 210, prevent slipping between the curl initiation end 210 and the movable portion 310 when the movable portion 310 presses the curl initiation end 210, and increase the stability of the compression curling mechanism 200.

In some embodiments of the present application, the base portion 100 has a planar structure or a curved structure, and the base portion 100 is made of a material with a certain hardness, wherein the curling mechanism 200 is arranged on the surface of the base portion 100 in an array manner, so as to ensure the stability of the fit connection between the curling mechanism 200 and the locking mechanism 300, and avoid the failure of the curling mechanism 200 and the locking mechanism 300 due to misalignment.

In some embodiments of the present application, the curled end 230 may be connected to the base portion 100 by one of gluing, wire bonding, riveting, welding, etc.; the connection manner of the mounting portion 320 and the contact portion of the locking structure is one of gluing, wire bonding, rivet riveting, welding, etc., the connection manner of the curled end 230, the mounting portion 320 and the base portion 100 is not limited in the present application, and any connection manner of the curled end 230, the mounting portion 320 and the base portion 100 belongs to the protection scope of the present application.

In some embodiments of the present application, as shown in fig. 8, a controller 400 is further provided in the self-curling buffer device, the controller 400 is connected to the trigger part 330 through a flexible wire, controls an activation mechanism of the trigger part 330, and the controller 400 is configured to determine whether the self-curling buffer device changes from a compressed state to a released state, and send a control signal to the trigger part 330 when determining that the self-curling buffer device needs to change from the compressed state to the released state; in one embodiment of the present application, the controller 400 is connected to a sensor, which may be one or more of an acceleration sensor, a speed sensor, a gyroscope, an optical sensor, a video, and the like, to distinguish the magnitude and direction of the impact force and send a signal to the trigger 330; in another embodiment of the present application, the controller 400 has a preset program therein, and when the program runs to a preset node, the controller 400 is triggered to send a signal to the triggering part 330.

In some embodiments of the present application, a groove is formed in the base portion 100, so that the flexible wires pass through the groove to connect the triggering portion 330 and the controller 400, thereby guiding the flexible wires, arranging the wires on the surface of the base portion 100, and preventing the disordered wires from affecting the structural change of the movable portion 310 of the locking mechanism 300 or the curling process of the curling mechanism 200, and further affecting the buffering effect.

In an embodiment of the present application, there is provided a method of manufacturing a self-curling cushioning device:

s1, manufacturing the basic part 100 with preset size and shape by adopting a 3D printing or mould pressing and other structural forming modes;

s2, calculating and determining the size and the number of the curling mechanism 200 and the locking mechanism 300 and the arrangement form on the substrate structure according to the specific application scene and the impact force, selecting the superelastic film with a smaller elastic modulus and the tough material sheet with a larger elastic modulus according to the calculated data, cutting the superelastic film and the tough material sheet into the calculated size, uniformly stretching the cut superelastic film and the tough material sheet for a certain deformation amount, and bonding the cut superelastic film and the tough material sheet to obtain the curling mechanism 200;

s4, machining the locking mechanism 300 made of the intelligent material in a turning, cutting or 3D printing mode according to the size of the locking mechanism 300 calculated in the step S2;

s5, fixedly connecting the processed curling tail end 230 of the curling mechanism 200 and the mounting part 320 of the locking mechanism 300 to the base part 100 by gluing, welding and the like according to the array arrangement form determined in the step S2;

s6, determining the proper controller 400, connecting all the triggering parts 330 on the base structure with the controller 400 by thin wires, simultaneously scribing grooves on the base part 100 and arranging all the thin wires therein, and extending all the curling starting ends 210 of the curling mechanism 200 under the movable part 310 of the locking mechanism 300 and adjusting them to be in a closed state, so as to obtain the self-curling buffer device.

According to the first concept of the application, the structure of the buffer device is improved, the curling mechanism and the locking mechanism are arranged in the buffer device, the curling mechanism with elasticity plays a buffering role, the volume of the curling mechanism is controlled by the locking mechanism, a better buffering effect is achieved, and meanwhile compared with other buffering forms, the volume and the weight of the buffer device are reduced, and the safety is improved.

According to the second concept of the application, the structure of the curling mechanism is improved, the curling mechanism is arranged to be in a cross-shaped plane structure, the curling section is curled towards the center of the cross shape, when the curling mechanism is arranged to be in the cross shape, the force in multiple directions can be buffered, and the situation that the impact force comes from the side direction of the curling mechanism, the buffering effect cannot be achieved.

According to the third conception of the application, the structure of the locking mechanism is improved, the installation part and the movable part are arranged into the rhombic fence structure, the triggering part is arranged into the resistance wire, the resistance wire is wound on the movable part, the resistance wire which generates heat is wound and connected onto the memory metal wire, the heating speed of the memory metal wire is greatly increased, the memory metal wire is bent into the rhombic fence structure, the deformation of the memory metal wire can be limited in the plane range, and the influence on the buffering effect is avoided when the movable part is tilted.

According to the fourth concept of the application, the locking mechanism is set to be the intelligent material, the intelligent material can be used for simply and conveniently driving the structure, and the structure can be changed into a new structure only by applying external excitation to the intelligent material, so that the buffering speed is increased.

According to the fifth concept of the present application, the granular protrusions are provided on the surface of the movable portion that contacts the curl start end to increase the frictional force between the movable portion and the curl start end, so that slipping between the curl start end and the movable portion is avoided when the movable portion presses the curl start end, and the stability of the compression curling mechanism is increased.

According to the sixth conception of the application, the groove is formed in the base portion, the flexible conducting wire is connected with the triggering portion and the controller through the groove, the guiding effect is achieved on the flexible conducting wire, the conducting wire is integrated on the surface of the base portion, the phenomenon that the disordered conducting wire influences the structural change of the movable portion of the locking mechanism or the curling process of the curling mechanism is avoided, and the buffering effect is further influenced.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.