Elastic sheet applied to Bluetooth equipment

Abstract

The utility model discloses an elastic sheet applied to Bluetooth equipment, the cross section of a flexible sheet body is an arc curved surface, and the flexible sheet body has residual stress in a flattened state, so that spontaneous bending of a material due to external slight disturbance can be effectively prevented, the flexible sheet body can be kept stable in the flattened state, and the Bluetooth equipment is convenient to place and store.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bluetooth equipment more specifically, it is related to a kind of elasticity sheet for being applied to bluetooth equipment. BACKGROUND

[0002] At present, such as clip ear type bluetooth earphone and bluetooth ring etc. Bluetooth equipment, it is embedded with elastic sheet, to hold and fix in specific part of human body, such as the most common clip ear type bluetooth earphone on market generally is to adopt U-shaped waist end to complete clamping, two relatively larger end portions are respectively arranged in waist end two ends, sound emitting unit and circuit unit are respectively arranged in end portion, two end portions are opened and closed by waist end, to facilitate clamping in human body auricle position. Such as the Chinese utility model patent with patent announcement No. CN218976808U discloses a two-end clip ear type bluetooth earphone, it includes: shell, the shell has first head end and second head end, the first head end and the second head end are connected by waist end;Sound guide structure, the sound guide structure communicates the internal space of the first head end and the second head end, when using earphone, two ends can be opened and clamped to auricle by elasticity, without being inserted into ear canal.

[0003] In bluetooth equipment, such as clip ear type bluetooth earphone and bluetooth ring etc., elastic sheet is the key component to realize that equipment is fixed to specific part of human body. However, the existing elastic sheet has obvious problem of poor form stability. Specifically, it is difficult to flatten or difficult to maintain in flattened state, once traditional elastic sheet is bent, it is often difficult to recover to initial flattened state, or even if it can be flattened, it cannot maintain this state for a long time. Secondly, with the increase of use times, traditional elastic sheet is prone to material fatigue phenomenon, which leads to gradual decline of its elasticity and strength, eventually affecting the stability of equipment and the wearing experience of user. UTILITY MODEL CONTENTS

[0004] In order to overcome the shortcomings of the prior art, the utility model provides an elastic sheet for bluetooth equipment to solve the problem of poor form stability of the existing elastic sheet.

[0005] The technical scheme of the utility model is as follows: an elastic sheet for bluetooth equipment, comprising:

[0006] Flexible sheet body;The flexible sheet body is switched between flattened state and curved state by deformation, the cross section of the flexible sheet body is arc surface, and the diameter of the arc of the arc surface is 15mm-25mm, so that it has residual stress inside in flattened state to maintain in flattened state;

[0007] Among them, the flexible sheet body is cut and formed from a complete circular structure, when the flexible sheet body is in curved state, the inner arc surface diameter of the flexible sheet body is equal to the inner diameter of the circular structure.

[0008] Further, the flexible sheet is selected from any one of spring steel or carbon steel.

[0009] Further, the thickness of the flexible sheet is 0.12mm~0.15mm.

[0010] Further, the width of the flexible sheet is 8mm~12mm.

[0011] Further, the inner diameter of the circular structure is 18mm~28mm.

[0012] Further, the width of the flexible sheet is 8mm~10mm.

[0013] Further, the inner diameter of the circular structure is 21mm~24mm.

[0014] Further, the flexible sheet is cut from the complete circular structure by laser cutting or precision stamping process.

[0015] The utility model discloses a flexible sheet applied to the bluetooth equipment, and the flexible sheet has residual stress in the flat state, can effectively prevent the material from bending spontaneously due to external slight disturbance, makes the flexible sheet can keep stable in the flat state, and the bluetooth equipment is convenient for placing and accomodating.

[0016] The utility model discloses a flexible sheet applied to the bluetooth equipment, and the flexible sheet has residual stress in the flat state, can effectively prevent the material from bending spontaneously due to external slight disturbance, makes the flexible sheet can keep stable in the flat state, and the bluetooth equipment is convenient for placing and accomodating.

[0017] The utility model discloses a flexible sheet applied to the bluetooth equipment, and the flexible sheet has residual stress in the flat state, can effectively prevent the material from bending spontaneously due to external slight disturbance, makes the flexible sheet can keep stable in the flat state, and the bluetooth equipment is convenient for placing and accomodating. 4 -10 5 times bending cycle still can keep more than 95% shape recovery rate, and it is far better than ordinary spring steel and conventional shape memory alloy. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment or the description of prior art needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0019] Figure 1 It is the structural schematic drawing of the flexible sheet in the embodiment of the utility model in the flat state;

[0020] Figure 2 Figure 1 is a cross-sectional structure schematic diagram of a flexible sheet body in the embodiment of the present application;

[0021] Figure 3 Figure 2 is a structure schematic diagram of the elastic sheet in a bending state in the embodiment of the present application;

[0022] Figure 4 Figure 3 is a front view of the flexible sheet body in a bending state in the embodiment of the present application;

[0023] Figure 5 Figure 4 is a side view of the flexible sheet body in a bending state in the embodiment of the present application;

[0024] Figure 6 Figure 5 is a structure schematic diagram of a circular structure in the embodiment of the present application;

[0025] Figure 7 Figure 6 is a curve diagram of the strain energy E inside the connecting arm varying with the curvature K of the axial direction in the embodiment of the present application.

[0026] In the figure, 1, flexible sheet body; 2, circular structure; R1, arc diameter of the arc surface; W1, width of the flexible sheet body; R2, inner arc surface diameter of the flexible sheet body. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be further described in detail below in conjunction with the drawings and embodiments. The detailed description of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. It should be noted that when a component is referred to as "fixed" or "arranged" or "connected" to another component, it can be directly or indirectly located on the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or position based on the orientation or position shown in the drawings, and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions.

[0028] In order to better understand the present application, the present application will be further described below in conjunction with the drawings and embodiments:

[0029] Referring to Figure 1 and Figure 2As shown, the utility model embodiment provides a kind of elasticity piece applied to bluetooth equipment, including flexible sheet body 1;Flexible sheet body 1 is switched between flat state and bending state by deformation, the cross section of flexible sheet body 1 is arc curved surface, the radian diameter R1 of arc curved surface is 15mm~25mm, to make inside residual stress in flat state to maintain in flat state;Wherein, flexible sheet body 1 is cut into shape by complete circular structure 2, when flexible sheet body 1 is in bending state, the inner arc surface diameter R2 of flexible sheet is equal to the inner diameter of circular structure.

[0030] Specifically, the cross section of flexible sheet body 1 is arc curved surface, the radian diameter R1 of arc curved surface is 15mm~25mm, design like this, make flexible sheet body 1 inside residual stress in flat state, to ensure that flexible sheet body 1 keeps in flat state.

[0031] By utilizing the residual stress inside material to resist external slight disturbance, so that flexible sheet body 1 is more stable in flat state, to facilitate placing and storing bluetooth equipment.

[0032] Secondly, the cross section of flexible sheet body 1 is designed as arc curved surface, and its radian diameter is set in the range of 15mm~25mm.This design not only helps to improve the shape recovery rate of flexible sheet body 1, but also ensures the geometric certainty of bending path.When flexible sheet body 1 is in bending state, its inner arc surface diameter is equal to the inner diameter of original circular structure.Guarantee that material does not occur uncontrollable deformation in bending process, and at the same time, enhance the durability of material, this geometric design can effectively prolong the service life of flexible sheet body 1, and make it still keep more than 95% shape recovery rate after bending for many times.

[0033] Preferably, flexible sheet body 1 is selected from any one of spring steel or carbon steel.

[0034] When spring steel is selected as the production material of flexible sheet body 1, the carbon content of spring steel ranges from 0.6% to 0.9%, to balance the hardness and toughness of material.Specifically, carbon content gradient distribution is introduced in flexible sheet body 1 by laser cladding or thermal diffusion process, the carbon content of surface layer of flexible sheet body 1 is close to 0.9%, and the carbon content of core of flexible sheet body 1 is 0.6%, so that the surface layer of flexible sheet body 1 has anti-wear property, and the core has anti-fracture property, which can effectively prolong the service life of flexible sheet body 1.

[0035] When carbon steel is selected as the production material of flexible sheet body 1, first heat carbon steel flexible sheet body 1 to 850°C~950°C, keep warm for a period of time, make carbon dissolve in austenite fully, then cool to 400°C~500°C quickly for isothermal quenching, to obtain lower bainite organization, so as to significantly improve the strength and toughness of material, improve its bending performance and shape recovery ability. Embodiment 1

[0036] The elastic sheet applied to a Bluetooth device provided in this embodiment 1 is applied to a clip-on Bluetooth earphone, which includes a connecting arm, a sound generating unit and a battery unit electrically connected by a wire passing through the inside of the connecting arm.

[0037] Specifically, the connecting arm includes a flexible shell, an elastic sheet and a flexible circuit, and the elastic sheet and the flexible circuit are both arranged in the flexible shell. This design enables the connecting arm to switch between a flat state and a curved state through deformation, and the connecting arm remains in the current state when there is no external force or the applied external force is less than the critical deformation force. When the connecting arm is in the curved state, an auricle clamping space for clamping the auricle is formed between the sound generating unit and the battery unit, and the size of the auricle clamping space is adjusted by changing the relative position between the sound generating unit and the battery unit through bending the connecting arm to clamp the auricle.

[0038] In this embodiment 1, the elastic sheet includes a flexible sheet body 1, which switches between a flat state and a curved state through deformation. The cross section of the flexible sheet body 1 is an arc surface, and the diameter R1 of the arc of the arc surface is 15mm-25mm, so that the inside of the flexible sheet body 1 has residual stress to maintain the flat state. The flexible sheet body 1 is cut from a complete circular structure 2, and when the flexible sheet body 1 is in the curved state, the inner arc surface diameter R2 of the flexible sheet body is equal to the inner diameter of the circular structure.

[0039] Specifically, the cross section of the flexible sheet body 1 is an arc surface, and the diameter R1 of the arc of the arc surface is 15mm-25mm. This design enables the inside of the flexible sheet body 1 to have residual stress in the flat state, thereby ensuring that the flexible sheet body 1 remains in the flat state. By utilizing the residual stress inside the material to resist external slight disturbances, the flexible sheet body 1 is more stable in the flat state, thereby facilitating the placement and storage of the Bluetooth device.

[0040] Specifically, the cross section of the flexible sheet body 1 is designed as an arc surface, and the diameter of the arc is set in the range of 15mm-25mm. This design not only helps to improve the shape recovery rate of the flexible sheet body 1, but also ensures the geometric certainty of the bending path. When the flexible sheet body 1 is in the curved state, the inner arc surface diameter is equal to the inner diameter of the original circular structure, which ensures that the material will not deform uncontrollably during bending, and at the same time enhances the durability of the material. This geometric design can effectively prolong the service life of the flexible sheet body 1, and the shape recovery rate of the flexible sheet body 1 can still be greater than 95% after being bent for many times.

[0041] The connecting arm contains residual stress, which can cause its internal strain energy E to have two minimum values. For example, if the radius of curvature of the connecting arm's axis is r, then the curvature κ in the axial direction is 1 / r. When the connecting arm switches from a flattened state to a bent state, the radius r changes from infinity to r², and the curvature κ changes from 0 to κ². Figure 7 As shown, the strain energy E inside the connecting arm first increases with the increase of κ, and then rapidly decreases to the minimum value E2. The straight and coiled states of the connecting arm correspond to the minimum values ​​of energy E at points A and C, respectively, both of which are stable states. Therefore, the connecting arm has a bistable structure. When the connecting arm changes from straight to bent, it must pass through an energy high point B, called the energy barrier. Under the action of external force, the connecting arm crosses the energy barrier point B. Due to the steep downward slope of segment BC, the connecting arm rapidly releases strain energy and quickly deforms and coils. When the deformation is constrained, for example, when the size of the auricle is large, the curvature is limited to not exceeding κm. At this time, the energy of the connecting arm is maintained at point D, which allows the ear-clamp Bluetooth headset to be firmly clamped on the auricle, reducing the risk of falling off. Secondly, it can fit different auricle shapes, thereby improving the wearing comfort.

[0042] Preferably, the thickness of the flexible sheet 1 is 0.12mm~0.15mm. This design takes into account both the requirements of lightweight and strength, which not only reduces the weight of materials, but also ensures that the flexible sheet 1 has sufficient rigidity to withstand external loads.

[0043] It is worth mentioning that if the connecting arm is too large, it will easily lead to a bulky overall size of the earphone, increasing the pressure on the ears, especially causing discomfort when worn for a long time. Therefore, the flexible sheet 1 provided in this embodiment 1 has a width between 8mm and 12mm. This design makes the connecting arm thin and light, reducing the pressure on the ears and significantly improving the comfort of users when wearing clip-on Bluetooth earphones.

[0044] The inner diameter of the circular structure is 18mm~28mm. Specifically, the flexible sheet 1 is cut from the complete circular structure 2 by laser cutting or precision stamping. When the flexible sheet 1 is in a bent state, the inner arc diameter R2 of the flexible sheet is equal to the inner diameter of the circular structure.

[0045] When the clip-on Bluetooth earphones are not needed, the connecting arm can be switched from a bent state to a flat state. Since the elastic sheet can change shape as needed, the clip-on Bluetooth earphones can be unfolded into a relatively flat shape. Example 2

[0046] The embodiment 2 provides a flexible sheet applied to a Bluetooth device, which is applied to a smart ring. The smart ring comprises a ring body, the ring body comprises a flexible shell, a flexible sheet and a flexible control plate, the flexible sheet and the flexible control plate are arranged in the flexible shell, the ring body is switched between a curled state and a flattened state through deformation, and the ring body is kept in the current state when no external force is applied or the applied external force is less than a critical deformation force, that is, when the ring body is in the curled state, the ring body can be kept in the curled state when no external force is applied or the applied external force is less than the critical deformation force, and when the ring body is in the flattened state, the ring body can be kept in the flattened state when no external force is applied or the applied external force is less than the critical deformation force.

[0047] When the ring body is in the curled state, the ring body surrounds a wearing cavity for adapting to a finger, and the inner diameter of the wearing cavity is adjusted by bending the ring body to clamp and fix the finger. In this way, the smart ring adjusts the curvature to change the inner diameter of the wearing cavity through bending, can dynamically adapt to the change of the finger, ensures that the smart ring is always closely fitted with the finger, avoids discomfort or ring falling caused by size mismatch, and greatly improves the comfort of wearing. When the ring is in the flattened state, the shape is flat, facilitating storage and charging.

[0048] Since the flexible sheet body 1 is too narrow, the contact area between the ring and the finger is insufficient, the local pressure is easily increased, and discomfort is caused when wearing; and if the flexible sheet body 1 is too wide, the ring and the finger are not adapted, the edge of the ring presses the finger, and the comfort is affected. Therefore, the width W1 of the flexible sheet body provided in the embodiment 2 is 8mm-10mm.

[0049] Preferably, the flexible sheet body 1 is cut and formed from a complete circular structure 2 through laser cutting or precision stamping process. When the flexible sheet body 1 is in the curved state, the inner arc surface diameter R2 of the flexible sheet body is equal to the inner diameter of the circular structure, and the inner diameter of the circular structure is 21mm-24mm.

[0050] It should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly used when the product is used, which is only for the convenience of describing the application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, structure and operation, and therefore cannot be understood as limiting the application.

[0051] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall fall within the protection scope of the appended claims of the utility model.

[0052] The utility model discloses has been described exemplarily above in combination with the drawings, obviously, the implementation of the utility model patent is not limited by the above-mentioned mode, as long as the various improvements of the method concept and technical scheme of the utility model patent are adopted, or the concept and technical scheme of the utility model patent are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A flexible sheet applied to a Bluetooth device, characterized in that, Comprising: a flexible sheet formed by cutting from a complete circular shape structure, the flexible sheet switches between a flattened state and a curved state by deformation, the cross section of the flexible sheet is an arc surface so that it has residual stress inside to maintain in the flattened state.

2. The flexible sheet for use in a Bluetooth device according to claim 1, wherein: The flexible sheet is selected from any one of spring steel or carbon steel.

3. The elastic sheet for use in Bluetooth devices as described in claim 1, characterized in that: The thickness of the flexible sheet is 0.12mm~0.15mm.

4. The elastic sheet for use in Bluetooth devices as described in claim 1, characterized in that: The width of the flexible sheet is 8mm~12mm.

5. A flexible sheet for use in a Bluetooth device as claimed in claim 4, characterized in that: The inner diameter of the circular shape structure is 18mm~28mm.

6. The flexible sheet for use in a Bluetooth device of claim 1, wherein: The width of the flexible sheet is 8mm~10mm.

7. A flexible sheet for use in a Bluetooth device as claimed in claim 6, characterized in that: The inner diameter of the circular shape structure is 21mm~24mm.

8. A flexible sheet for use in a Bluetooth device as defined in claim 6, characterized by: The flexible sheet is cut from the complete circular shape structure by laser cutting or precision stamping process.

Images