Dual-purpose cervical vertebra protection pillow for sleeping on side and sleeping on back

Abstract

The invention discloses a side-sleeping and back-sleeping dual-purpose cervical vertebra protection pillow, and particularly relates to the field of bedding articles, the side-sleeping and back-sleeping dual-purpose cervical vertebra protection pillow comprises a three-layer composite structure pillow body, and the composite structure pillow body comprises an upper flexible supporting layer, a middle transition layer and a lower supporting layer which are arranged from top to bottom; a first groove with a downward opening is formed in the center of the upper surface of the middle transition layer, a first protrusion protruding upwards is arranged at one end of the upper surface of the middle transition layer, and a concave-convex face attached to the first protrusion and the first groove is arranged on the lower surface of the upper flexible supporting layer. The upper flexible supporting layer and the lower supporting layer fully wrap the first protruding end corresponding to the middle transition layer. Pillow interior materials with different properties are combined, and a high-precision integrated cutting process is utilized, so that pressure is gradually dispersed in the downward pressing process of the head, instant grounding or discomfort is avoided, and the pillow interior can effectively support and protect the cervical vertebra when lying on the back, lying on the side and at any position.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bedding, more particularly, the present application relates to a cervical vertebra protection pillow for both side sleeping and back sleeping. BACKGROUND

[0002] The posture of the cervical vertebra and head plays a crucial role in sleep quality. Studies have shown that poor cervical vertebra posture during sleep can exert excessive pressure on the cervical structure, leading to a series of discomfort symptoms, including neck and shoulder pain, tension headaches, and muscle stiffness. This condition not only affects daytime activities but also has adverse effects on long-term health. A well-designed pillow can effectively support the cervical vertebra, help maintain a natural physiological lordotic curve, reduce neck pressure, and thus improve sleep quality. Researchers have found that pillow designs that support the natural lordotic curve of the cervical vertebra can significantly extend the duration of deep sleep. At the same time, other factors of the pillow, such as head cooling function, also contribute to improving sleep quality. By reducing head temperature, reducing sweating, and slowing down heart rate, the pillow can further promote the depth and continuity of sleep. However, improper pillow design can have multiple negative effects on health. If the cervical vertebra cannot maintain a natural curve, the neck muscles and ligaments will bear excessive tension, leading to stiffness and pain. In the long run, it may even trigger chronic cervical and spinal problems. Misalignment of the cervical vertebra and spine also affects blood circulation, compresses the basilar nerves, and causes headaches or migraines. In addition, a pillow that is too high or lacks support may cause shoulder and back muscle tension, interfere with normal sleep, and increase sleep disturbances, frequent turning, and other problems. Therefore, how to design a pillow that can effectively support the cervical vertebra, improve sleep quality, and meet the needs of different age groups has become an important topic.

[0003] Cervical spondylosis and cervical spondylosis are very common health problems in modern population, and the incidence rate in young population has shown an upward trend in recent years. Such diseases often cause neck pain, limited activity, nerve compression and other symptoms, and can seriously affect daily life and health. For cervical health, various cervical protection pillows, rehabilitation pillows and treatment pillows have appeared on the market, and their structural designs are constantly being updated. For example, some patented products use a partitioned height structure with lower middle height than both sides (such as CN210407929U, CN214072755U), or a more complex groove structure (such as CN208243343U), but these designs all require users to actively align their heads with specific areas during use, otherwise it is difficult to achieve the desired cervical support effect. In addition, some products achieve height adjustment by adding height adjustment pads made of slow rebound material (such as CN206044204U), but such solutions not only increase manufacturing costs, but also require manual adjustment by the user, making the use process cumbersome. Some products achieve health care function by filling Chinese herbal medicine in the pillow core (such as CN203207662U), but the Chinese herbal medicine filling has the risk of leakage, affecting the normal use and health safety of the pillow.

[0004] Currently, the mainstream cervical pillow on the market adopts a partitioned height design, i.e., the height of the supine area is lower than that of the lateral lying area, to adapt to the different support needs of the cervical spine in supine and lateral lying positions. This is based on the ergonomic principle that the distance between the back of the neck and the back of the head is generally equal to the distance between the side of the neck and the side of the head. According to the principle that the pressure of the head on the pillow is equal to its gravity (F=G=mg), according to the formula of elasticity mechanics ΔL=FL0 / (EA) (ΔL: length / thickness change of material compressed; F: total force applied; L0: original thickness; A: force area; E: Young's modulus (elastic modulus of material, unit Pa)), the contact area of the head on the pillow when lying on the side is smaller than when lying on the back, and the indentation (ΔL) of the lateral lying area is larger than that of the supine area. To ensure that the cervical spine can be reasonably supported in different sleeping positions, the lateral lying area is usually designed to be higher than the supine area.

[0005] However, the existing technology generally relies on partitioned height, complex groove or additional fillers to achieve cervical protection, and has problems such as complex structure, inconvenience to use, high cost or health hazards. SUMMARY

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present application provide a cervical protection pillow for both lateral sleeping and supine sleeping, and the technical problem to be solved by the present application is that the existing cervical protection pillows, rehabilitation pillows and treatment pillows mostly have problems such as complex structure, inconvenience to use, high cost or health hazards.

[0007] To achieve the above object, the present application provides the following technical solutions: the cervical vertebra protection pillow for side sleeping and supine sleeping, comprising a three-layer composite structure pillow body, the composite structure pillow body comprises an upper flexible support layer, an intermediate transition layer and a lower support layer arranged from top to bottom;

[0008] The upper surface center of the intermediate transition layer is provided with a first downward opening groove, one end of the upper surface of the intermediate transition layer is provided with a first upward protrusion, and the lower surface of the upper flexible support layer is provided with a concave-convex surface matched with the first protrusion and the first groove, and the upper flexible support layer and the lower support layer fully wrap the first protrusion end of the intermediate transition layer.

[0009] The lower support layer is provided with a second groove at the corresponding position of the first groove in the longitudinal body position center, and is provided with a second protrusion and a third protrusion on both sides respectively, the third protrusion and the second groove are matched with the lower surface of the intermediate transition layer, and the second protrusion is matched with the lower surface of the upper flexible support layer.

[0010] In a preferred embodiment, the upper flexible support layer and the lower support layer are bonded with the intermediate transition layer through an adhesive, wherein the adhesive is one of polypropylene (PP) glue or low wire-drawing PP glue, which is aging-resistant, waterproof, environmentally friendly and non-toxic, does not affect the softness of the material, and has high bonding strength.

[0011] In a preferred embodiment, the upper flexible support layer adopts low-density 40D memory cotton, the intermediate transition layer adopts medium-density 40D memory cotton, and the lower support layer adopts high-density 60D memory cotton, the upper and lower surfaces of the intermediate transition layer, the lower surface of the upper flexible support layer and the upper surface of the lower support layer are all wavy, the wavy surface structure adopts high-precision two-dimensional CNC cutting technology, and the cutting error is not more than 3mm; the upper flexible support layer is made of fast-rebound material, has good elasticity and fast recovery deformation capability, can quickly recover to the original state after the head pressure is released, improves the surface matching feeling and dynamic support property, and avoids collapse or stuffy feeling due to long-term pressure; the lower support layer adopts high-density slow-rebound material, can cope with brain pressure of different weights, always maintains 70%-90% of the original thickness, and can ensure that the cervical vertebra region obtains continuous and stable support whether supine or side lying; the wavy matching surface design of the upper flexible support layer and the intermediate transition layer realizes soft matching and gradual transition, disperses the pressure step by step during the head pressing process, avoids instantaneous bottoming or discomfort, and the wavy structure also has the effect of anti-skid; the protrusion and concave-convex structure of the first protrusion, the first groove, the second protrusion, the third protrusion and the second groove form a matched composite structure pillow body, limit the relative position of the upper flexible support layer and the lower support layer, and prevent the dislocation movement of the upper flexible support layer and the lower support layer.

[0012] In a preferred embodiment, the upper flexible support layer and the lower support layer form a pillow r-shaped partition of the shoulder and neck support wrapped by the intermediate transition layer along the first convex position, support the physiological curve of the head and neck, and the edge of the micro slope design fits the shoulder and neck curve; the corresponding first groove of the upper flexible support layer corresponds to the head and brain area, and plays a wrapping and limiting role.

[0013] In a preferred embodiment, the connection surface of the intermediate transition layer and the lower support layer forms a continuous curved surface structure and a second convex, a third convex and a second groove, which is used to highly fit the natural C-shaped curve of the human cervical spine and the back of the brain, and provides additional lateral support for the head or neck when the user is lying on the side, prevents the head from sliding sideways, enhances stability and wrapping, without the need for traditional mechanical nesting or filling method, the overall structure is more stable and durable, significantly improves the support effect and use comfort of the cervical spine area; the depression in the middle area cooperates with the convex on both sides, so that the head can naturally sink and be wrapped when lying on the back or side, preventing left and right sliding and effectively fixing the head position; since there are convex on both sides, the user can choose to use the left or right side close to the neck according to personal habits, without the need to distinguish the direction of the pillow, improving the applicability and convenience of the product.

[0014] In a preferred embodiment, the upper flexible support layer adopts memory foam with a thermal coefficient of 1.5-2.0, a density of 35-45 kg / m 3 , a 25% indentation hardness of 25N-40N±5N, a tensile strength of ≥30KPa, and a thickness of 2-5cm, which can quickly respond to head pressure, slowly sink and provide soft initial support and wrapping, improving comfort and stability.

[0015] In a preferred embodiment, the intermediate transition layer adopts memory foam with a thermal coefficient of 1.5-4, a density of 40-55 kg / m 3 , a 25% indentation hardness of 35N-55N±5N, a tensile strength of ≥40KPa, and a thickness of 2-5cm, which provides moderate support force to adapt to the intermediate pressure of the head, and as a transition layer between the upper flexible support layer and the lower support layer, plays a role of up and down, thereby optimizing the support performance.

[0016] In a preferred embodiment, the lower support layer adopts memory foam with a thermal coefficient of 1-5, a density of 40-70 kg / m 3, 25% of the indentation hardness is 50N-70N+5N, the tensile strength is greater than or equal to 40KPa, the thickness is 5-10cm, the memory sponge has strong support when providing soft and comfortable touch; the composite structure pillow body presents a 4.5-7cm pillow height after being indented when bearing the natural load of the user's head, and the load-deformation characteristics of the composite structure pillow body present a nonlinear response, so that the head of the user with different body weights can present a suitable pillow height after being indented, and the cervical curvature support conforming to ergonomics is obtained.

[0017] Technical effects and advantages of the present application:

[0018] 1. The pillow core material with different properties is combined, and a high-precision integrated cutting process is used, without additional grooves, traditional Chinese medicine filling or height partition design, so that the pressure is gradually dispersed during the head pressing process, the instantaneous bottoming or discomfort is avoided, the continuous and stable support is provided for the cervical region, the effective support and protection of the cervical vertebrae in the supine, lateral and any positions are realized, and the applicability, comfort and safety of the product are significantly improved.

[0019] 2. The pillow core surface forms a continuous curved surface structure and a plurality of protrusions and depressions through the reasonable material matching of the three-layer composite structure and the high-precision two-dimensional cutting process; the structure does not need the traditional partition height design, can automatically adapt to the stress distribution of the head and the pillow core when the user lies on the back or the side, and the indentation depth of the brain cavity region is stably controlled between 4.5-7cm in the supine and lateral positions without the active adjustment of the user, so that the physiological curvature and support demand of the cervical vertebrae are effectively guaranteed, and the comfort and health of sleep are improved.

[0020] 3. The whole adopts an arc-shaped structure design, the stress area is in a curved surface distribution, the local pressure can be dispersed, the pressure concentration is reduced, and the risk of soft tissue compression is reduced. DETAILED DESCRIPTION

[0021] Figure 1 It is a whole structure schematic view of the present application.

[0022] Figure 2 It is a whole structure sectional view of the present application.

[0023] Figure 3 It is a pressure distribution schematic view of the comparative example 1 of the present application.

[0024] Figure 4 It is a pressure distribution schematic view of the comparative example 2 of the present application.

[0025] Figure 5 It is a pressure distribution schematic view of the composite structure pillow body of the present application.

[0026] Figure 6Compression curve of the upper flexible support layer of the present application.

[0027] Figure 7 Compression curve of the intermediate transition layer of the present application.

[0028] Figure 8 Compression curve of the lower support layer of the present application.

[0029] Figure 9 Compression curve of the composite structure pillow body of the present application.

[0030] The reference signs are: 1 upper flexible support layer, 2 intermediate transition layer, 3 lower support layer, 4 first protrusion, 5 first groove, 6 second protrusion, 7 third protrusion, 8 second groove. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] The present application provides a neck protection pillow for side sleeping and back sleeping as shown in Figures 1-2 The present application provides a neck protection pillow for side sleeping and back sleeping as shown in

[0033] The upper flexible support layer 1 is made of a fast-rebound material, has good elasticity and fast recovery ability, can quickly recover to the original state after the head pressure is released, improves the surface fitting feeling and dynamic support, and avoids collapse or stuffy feeling due to long-term pressure; the lower support layer 3 is made of a high-density slow-rebound material, can cope with different brain pressures of different weights, and always maintains 70%-90% of the original thickness, whether lying on the back or the side, can ensure that the cervical spine area obtains continuous and stable support; the wave-shaped fitting surface design of the upper flexible support layer 1 and the intermediate transition layer 2 realizes soft fitting and gradual transition, so that the pressure is gradually dispersed during the head pressing process, and instantaneous bottoming or discomfort is avoided; the wave-shaped structure also has the effect of preventing slipping;

[0034] The upper flexible support layer 1 and the lower support layer 3 form an r-shaped partition of the pillow core that wraps the intermediate transition layer 2 along the position of the first protrusion 4, supports the physiological curve of the head and neck, and the edge of the micro-slope design fits the shoulder and neck curve, supports the extension to the posterior cervical shoulder position, makes the shoulder more fit, and supports without gap; the first groove 5 corresponding to the upper flexible support layer 1 corresponds to the posterior brain area of the head, and plays a wrapping and limiting role; the connection surface of the intermediate transition layer 2 and the lower support layer 3 forms a continuous curved surface structure and the second protrusion 6, the third protrusion 7 and the second groove 8, which is used to fit the natural C-shaped curve of the human cervical spine and posterior brain, and provides additional lateral support for the head or neck when the user lies on the side, prevents the head from sliding sideways, enhances stability and wrapping feeling, without the need for traditional mechanical nesting or filling method, the overall structure is more stable and durable, significantly improves the support effect and use comfort of the cervical spine area; the recess in the middle area cooperates with the protrusions on both sides, so that the head can naturally sink and be wrapped when lying on the back or the side, preventing left and right sliding, effectively fixing the head position; because there are protrusions on both sides, the user can choose to use the left or right side close to the neck according to personal habits, without distinguishing the direction of the pillow, improving the applicability and convenience of the product, automatically adapting to the user's body size and sleeping position, without manual adjustment;

[0035] A first groove 5 opening downward is provided at the center of the upper surface of the intermediate transition layer 2, a first protrusion 4 protruding upward is provided at one end of the upper surface of the intermediate transition layer 2, and the lower surface of the upper flexible support layer 1 is provided as a concave-convex surface fitted with the first protrusion 4 and the first groove 5, and the first protrusion 4 end of the intermediate transition layer 2 corresponding to the upper flexible support layer 1 and the lower support layer 3 is fully wrapped;

[0036] The second groove 8 is provided at the corresponding position of the first groove 5 in the longitudinal body position center of the lower support layer 3, the second protrusion 6 and the third protrusion 7 are respectively provided on both sides of the lower support layer 3, the third protrusion 7 and the second groove 8 are fitted with the lower surface of the intermediate transition layer 2, and the second protrusion 6 is fitted with the lower surface of the upper flexible support layer 1, without the risk of loose connection, and the long-term use stability is better.

[0037] Example 1:

[0038] The implementation is specific: the composite structure pillow presents a 4.5-7 cm post-compression pillow height when bearing the natural load of the user's head, preferably 5-6.5 cm in the preferred embodiment, and 6-7 cm in the best embodiment, wherein the load-deformation characteristics of the three-layer composite structure pillow present a nonlinear response, enabling the head of a user of different body weight to present a 4.5-7 cm post-compression pillow height, achieving ergonomic cervical curvature support without user selection of zones, full-automatic adaptation, safer physical support, and avoiding the risk of drug allergies;

[0039] The following explains the theoretical principle that the post-compression optimal height of the user's sleep pillow cover and pillow core assembly is 6-7 cm:

[0040] The selection of pillow height has always been a difficult problem that the academic community has not clearly solved; existing research shows that different researchers have conducted a large number of experiments on the influence of pillow height on cervical health and sleep comfort, but the conclusions differ greatly:

[0041] Through a sleep test on 4 men and 4 women, it was found that the appropriate pillow height after compression in a supine position is 6-7 cm;

[0042] Experiments were conducted on 16 people without clinical symptoms, and it was found that a pillow height of 10 cm can maintain the best spinal alignment;

[0043] Pulmonary function assessment was conducted on 20 test subjects, and the results showed that a pillow height of 5 cm has a significant impact on vital capacity, and a pillow that is too high will cause excessive curvature of the neck and reduce ventilation capacity;

[0044] Research has found that the lowest neck pressure occurs when the pillow height is 11 cm, and as the height increases, the pressure increases significantly;

[0045] Research was conducted on 19 women, and it was found that a pillow height of 7 cm is more suitable for sleeping in a supine position, and a pillow height exceeding 7 cm will increase cervical pressure and discomfort;

[0046] Head-back distance refers to the horizontal distance between the back of the head and the back support surface of the human body in a sitting or standing position, and its calculation formula is: head-back distance = back width - maximum head length; research shows that as age increases, the head-back distance of men and women will increase, and after the skeletal development is completed at the age of 18-55, the head-back distance of women is generally greater than that of men (the average for men is 6.1 cm, and the average for women is 6.9 cm);

[0047] Analyzing the relationship between changes in pillow height and its pressure distribution, it is found that:

[0048] The contact area increases with the increase of pillow height, while the peak pressure shifts from the skull area to the neck area;

[0049] The pressure reaches a minimum value when the pillow height is 6-7 cm, and reaches a maximum value when the height is 14 cm;

[0050] In addition, the present patent adopts the thoracic diameter spine positioning method to determine the change trend of the spine curve when lying on the back and lying on the side, and analyzes that the appropriate pillow height when lying on the back is 6-7 cm after compression. Therefore, the present patent proposes that the height of the pillow and the pillow cover assembly after compression is 6-7 cm, which is not only beneficial to the health of the cervical spine, but also can provide users with a more comfortable sleep experience;

[0051] As Figures 3-5 , the embodiment is specifically: a three-layer composite structure pillow body uses a gradient support and stress dispersion structure design, the bottom is designed to have the smallest thickness, but the largest hardness and density, and can bear the maximum compressive stress; this design concentrates the main pressure in the most stable area, preventing deformation of the bottom; the middle transition layer 2 has moderate hardness, can share part of the pressure, and can also alleviate the rigidity difference between the bottom and the top, avoiding stress concentration leading to fracture; the upper flexible support layer 1 has the smallest hardness, provides a certain elastic deformation ability, absorbs external impact or vibration, protects the bottom core structure, and realizes efficient load transfer as a whole; the gradient support design from bottom to top and from hard to soft ensures that the human head and body are always in the optimal support state regardless of lying on the back, lying on the side or other postures, realizing the dual effects of stable support and dynamic protection;

[0052] Two neck protection pillows on the market are used as Comparative Example 1 and Comparative Example 2, and are tested by the same tester lying on the back, and the detailed information is as follows:

[0053] Comparative Example 1: the neck support is unevenly stressed, and the brain stress is mainly concentrated in a small range, and this pillow cannot give the user good head support;

[0054] Comparative Example 2: only the head bears most of the pressure, and long-term use will cause discomfort or muscle tension;

[0055] The composite structure pillow body: the pressure is evenly distributed, and the neck is moderately supported, and the brain area is evenly stressed, which can effectively support the user;

[0056] Example 2:

[0057] As Figures 6-9 , the upper flexible support layer 1 has a thermal coefficient of 1.5-2.0 and a density of 35-45 kg / m 3The first layer uses memory foam with a 25% indentation hardness of 25N-40N±5N, a tensile strength ≥30KPa, and a thickness of 2-5cm. This foam responds quickly to head pressure, slowly sinks, and provides soft initial support and a wrapping feel, enhancing comfort and stability. The second intermediate layer uses memory foam with a temperature sensitivity coefficient of 1.5-4 and a density of 40-55kg / m³. 3 A memory foam with a 25% indentation hardness of 35N-55N±5N, tensile strength ≥40KPa, and a thickness of 2-5cm provides moderate support to adapt to the mid-term pressure on the head. Serving as a transition layer between the upper flexible support layer 1 and the lower support layer 3, it optimizes support performance. The lower support layer 3 uses a temperature sensitivity coefficient of 1-5 and a density of 40-70kg / m³. 3 Memory foam with 25% indentation hardness of 50N-70N±5N, tensile strength ≥40KPa, and thickness of 5-10cm provides strong support while offering a soft and comfortable touch.

[0058] Depend on Figure 6 The data shows that the upper flexible support layer 1 has the following characteristics: maximum compressive force: 3N, maximum compressive strain: 35%, maximum compressive stress: 450Pa, and Young's modulus: 64Pa.

[0059] Depend on Figure 7 The data shows that the intermediate transition layer 2 has the following characteristics: maximum compressive force: 10N, maximum compressive strain: 35%, maximum compressive stress: 1600Pa, and Young's modulus: 250Pa.

[0060] Depend on Figure 8 The data shows that the lower support layer 3 has the following characteristics: maximum compressive force: 18N, maximum compressive strain: 35%, maximum compressive stress: 3300Pa, and Young's modulus: 400Pa.

[0061] Depend on Figure 9 The data shows that, in summary, the three layers have the following characteristics: maximum compressive force: 16.43 N, maximum compressive strain: 50%, maximum compressive stress: 2739 Pa, and Young's modulus: 126 Pa.

[0062] As can be seen from the three-layer sponge structure design, by combining and matching these layers and rationally designing the height of each layer, the desired compression parameters can be obtained that do not belong to any one layer of sponge. The combined sponge pillow has unique compression performance.

[0063] Finally should be explained a few points: first, in the description of the present application, unless otherwise specified and limited, the term "installation", "connected", "connection" should be broad, can be mechanical or electrical connection, but also can be two elements inside the communication, can be directly connected, "up", "down", "left", "right" and so on, only for indicating the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change;

[0064] Second: the drawings of the disclosed embodiments of the present application only involve the structures involved in the disclosed embodiments, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0065] Finally: the above only for the preferred embodiments of the present application, and not for limiting the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A cervical pillow for both side and back sleeping, characterized in that: The pillow body comprises a three-layer composite structure, which comprises an upper flexible support layer (1), an intermediate transition layer (2) and a lower support layer (3) arranged from top to bottom. A first downward recess (5) is formed in the center of the upper surface of the intermediate transition layer (2), and a first protrusion (4) is arranged at one end of the upper surface of the intermediate transition layer (2) and protrudes upward, and the lower surface of the upper flexible support layer (1) is arranged as a concave-convex surface matched with the first protrusion (4) and the first recess (5), and the upper flexible support layer (1) and the lower support layer (3) fully wrap the corresponding end of the first protrusion (4) of the intermediate transition layer (2). The lower support layer (3) is provided with a second recess (8) at the corresponding position of the first recess (5) in the longitudinal body center, and is provided with a second protrusion (6) and a third protrusion (7) on both sides, respectively, and the third protrusion (7) and the second recess (8) are matched with the lower surface of the intermediate transition layer (2), and the second protrusion (6) is matched with the lower surface of the upper flexible support layer (1).

2. The dual side and back sleeping cervical protection pillow according to claim 1, characterized in that: The upper flexible support layer (1) and the lower support layer (3) are bonded with the intermediate transition layer (2) through an adhesive, wherein the adhesive is one of polypropylene (PP) glue or low-drawing PP glue.

3. The dual side and back sleeping cervical protection pillow according to claim 1, characterized in that: The upper flexible support layer (1) adopts low-density 40D memory cotton, the intermediate transition layer (2) adopts medium-density 40D memory cotton, and the lower support layer (3) adopts high-density 60D memory cotton, and the upper and lower surfaces of the intermediate transition layer (2), the lower surface of the upper flexible support layer (1) and the upper surface of the lower support layer (3) are all wavy, and the wavy surface structure adopts high-precision two-dimensional CNC cutting technology, and the cutting error is not more than 3mm.

4. The side and back sleeping dual purpose cervical pillow of claim 3, wherein: The upper flexible support layer (1) and the lower support layer (3) form a shoulder-neck support r-shaped partition wrapping the intermediate transition layer (2) along the position of the first protrusion (4); and the corresponding first recess (5) of the upper flexible support layer (1) corresponds to the head and brain region.

5. The dual side and back sleeping cervical pillow of claim 4, wherein: The connecting surface of the intermediate transition layer (2) and the lower support layer (3) forms a continuous curved surface structure and the second protrusion (6), the third protrusion (7) and the second recess (8), which are used to match the natural C-shaped curve of the cervical spine and the back of the brain, enhance the stability and wrapping feeling.

6. The dual side and back sleeper cervical pillow of claim 3, wherein: The upper flexible support layer (1) adopts memory sponge with a temperature coefficient of 1.5-2.0, a density of 35-45 kg / m 3 25% indentation hardness of 25N-40N±5N, and a tensile strength of ≥30KPa.

7. The dual side and back sleeper cervical pillow of claim 6, wherein: The intermediate transition layer (2) is made of memory foam with a temperature coefficient of 1.5-4, a density of 40-55 kg / m 3 25% indentation hardness of 35N-55N±5N, tensile strength ≥40KPa.

8. The dual side and back sleeper neck protection pillow of claim 1, wherein: The lower supporting layer (3) adopts memory sponge with a temperature coefficient of 1-5, a density of 40-70 kg / m 3 25% indentation hardness of 50N-70N±5N, tensile strength ≥40KPa.

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