An adjustable soft-hard structure

Abstract

The application provides a soft and hard adjustable structure, and relates to the technical field of bearing structures. It comprises a base material unit and an adjusting unit, the adjusting unit is rotationally connected with the base material unit, the base material unit bears external pressure and transmits the external pressure to the adjusting unit, the inside of the adjusting unit forms a hollow cavity and is provided with a grid structure staggered horizontally and vertically, and the relative angle between the grid structure and the external pressure force direction can be adjusted when the adjusting unit rotates. By rotating the adjusting unit, the relative angle between the internal grid structure and the stress direction can be changed, the vertical pressure bearing cross-sectional area can be continuously adjusted, the support strength can be adjusted, and the softness and hardness of the base material unit can be flexibly adjusted. The application can adapt to users with different weights and different body feeling preferences, can meet the soft and hard requirements of various scenes, and significantly improves the use comfort and ergonomics of the product.

Description

Technical Field

[0001] This invention relates to the field of support structure technology, and in particular to an adjustable flexible structure. Background Technology

[0002] In the field of everyday products such as shoe soles, seat cushions, and pillows, the rigidity of the support structure directly determines the product's comfort and support performance. Currently, most everyday products use a one-piece structure design with fixed rigidity for their support base material. This structure lacks the ability to adjust its rigidity, and its support stiffness is fixed after manufacturing, making it impossible to actively adjust according to usage needs.

[0003] The aforementioned fixed-hardness support structure has many drawbacks in practical use:

[0004] First, different users have significant differences in weight, body shape, and tactile preferences, resulting in varying needs for support firmness. Heavier users typically require higher support firmness to avoid excessive deformation, while lighter users prefer a softer touch. A fixed-firm structure can only cover the needs of a portion of the user group, lacking universality and failing to simultaneously meet the tactile requirements of different users.

[0005] Secondly, the same user's needs for support firmness vary significantly depending on the usage scenario. For example, in shoes, a softer sole better cushions ground vibrations and improves comfort during short walks, while a firmer sole provides stronger support and reduces foot fatigue during prolonged standing or walking. Similarly, in a backrest cushion, sufficient firmness is needed to maintain lumbar posture while sitting for long periods at work, while a soft, comfortable feel is preferred during rest and relaxation. A fixed firmness structure cannot adapt to different scenarios and fails to meet the needs of various usage states.

[0006] Furthermore, during use, the fixed-rigidity support structure maintains a single support state in the stress area, which can easily lead to localized pressure concentration. Wearing a shoe sole with fixed rigidity for a long time can easily cause muscle soreness in the sole of the foot, and using a cushion with fixed rigidity for a long time can easily cause lumbar muscle strain. It is impossible to dynamically adjust the support performance according to the duration of use and stress state, and the comfort and ergonomic performance of long-term use are significantly limited.

[0007] In addition, the fixed hardness design increases the production and purchase costs of the product. In order to cover the needs of different consumer groups, manufacturers often need to develop multiple sets of molds and materials with different hardness for the same product, which increases production, inventory and management costs. Consumers also find it difficult to purchase a product that perfectly matches their needs at once, resulting in high purchase trial and error costs. Summary of the Invention

[0008] The purpose of this invention is to provide an adjustable rigidity structure to solve the technical problem that most existing household products use a fixed-rigidity, one-piece structural design for their supporting substrates, lacking the ability to adjust their rigidity. The various technical effects of the preferred solutions provided by this invention are detailed below.

[0009] To achieve the above objectives, the present invention provides the following technical solution: An adjustable rigid-flexible structure includes a substrate unit and an adjustment unit. The adjustment unit is rotatably connected to the substrate unit. The substrate unit bears external pressure and transmits the external pressure to the adjustment unit. The interior of the adjustment unit forms a hollow cavity and is provided with a crisscrossing grid structure. When the adjustment unit rotates, it can adjust the relative angle between the grid structure and the direction of the external pressure.

[0010] Preferably, the substrate unit has at least one connection hole in the pressure-bearing area, and an adjustment unit is rotatably connected to each connection hole. The adjustment unit is cylindrical and matches the connection hole.

[0011] Preferably, the adjustment unit has one or both ends forming adjustment ends in the axial direction, and the adjustment unit is provided with an auxiliary rotation structure corresponding to each adjustment end. An external force applied to the auxiliary rotation structure can drive the adjustment unit to rotate.

[0012] Preferably, the adjustment unit forms adjustment ends at both ends in the axial direction, the connection hole is formed through the substrate unit, and the two adjustment ends of the adjustment unit respectively protrude from the substrate unit and are located on the outside of the substrate unit.

[0013] Preferably, the adjustment unit forms the adjustment end at one end in the axial direction, and the adjustment end of the adjustment unit extends out of the substrate unit and is located outside the substrate unit.

[0014] Preferably, it further includes an electric drive unit, which is connected to the substrate unit and connected to the auxiliary rotation structure. When the electric drive unit is activated, it can drive the adjustment unit to rotate.

[0015] Preferably, the grid structure includes a first support plate and a second support plate, with multiple first support plates spaced apart and multiple second support plates spaced apart. All the first support plates and all the second support plates are connected to the inner wall of the hollow cavity, and all the first support plates and all the second support plates are perpendicularly connected to each other to form the grid structure.

[0016] Preferably, the adjustment unit has a gear structure on its outer side, and the base material unit has a mating clip at the corresponding position of the gear structure. The gear structure is movably connected to the mating clip, and the gear structure can restrict the circumferential movement of the adjustment unit that has been adjusted to the corresponding angle.

[0017] Preferably, the gear structure includes a gear slot formed on the outside of the adjustment unit. The gear slot is located within a circumferential range that rotates 45° clockwise or counterclockwise from the opposite direction of the external pressure application direction. Multiple adjustment gears are formed on the gear slot. The adjustment gears can be engaged with the mating clips. Each adjustment gear corresponds to an adjustment angle. The multiple adjustment gears are evenly or unevenly distributed.

[0018] Preferably, the adjustment unit is provided with a retaining ring structure, and the base material unit is provided with a mating groove at the alignment position of the retaining ring structure. The retaining ring structure is movably connected to the mating groove, and the mating groove can restrict the axial displacement of the adjustment unit.

[0019] The beneficial effects of this invention are as follows: by rotating the adjustment unit, the relative angle between the internal grid structure and the direction of force can be changed, and the vertical bearing cross-sectional area can be continuously adjusted to adjust the support force. This allows for flexible adjustment of the softness and hardness of the base material unit, which can not only adapt to users with different weights and different body preferences, but also meet the softness and hardness requirements of diverse scenarios, significantly improving the product's user comfort and ergonomic performance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of the present invention when external force is applied manually; Figure 2 This is a detailed structural diagram of the substrate unit of the present invention; Figure 3 This is a structural diagram of the present invention when an external force is applied using electric adjustment; Figure 4 This is a detailed structural diagram of the gear position structure and the cooperating clips of the adjustment unit of the present invention; Figure 5 This is a connection structure diagram of the adjustment unit and the electric drive unit of the present invention; Figure 6 This is a detailed structural diagram of the adjustment unit of the present invention when external force is applied manually. The diagram shows the initial state before the adjustment unit is rotated. Figure 7 This is a detailed structural diagram of the adjustment unit of the present invention when external force is applied for manual adjustment. The diagram shows the state of the adjustment unit after it has been rotated 45° counterclockwise. Figure 8 This is a detailed structural diagram of the adjustment unit of the present invention when an external force is applied by electric adjustment. The diagram shows the initial state before the adjustment unit rotates. Figure 9 This is a detailed structural diagram of the adjustment unit of the present invention when an external force is applied by electric adjustment. The diagram shows the state of the adjustment unit after it has been rotated 45° counterclockwise.

[0022] In the diagram: 1. Substrate unit; 11. Connecting hole; 12. Mating clip; 13. Mating slot; 2. Adjustment unit; 21. Hollow cavity; 22. Mesh structure; 221. First support plate; 222. Second support plate; 23. Auxiliary rotation structure; 24. Gear structure; 241. Gear slot; 242. Adjustment gear; 25. Snap ring structure; 3. Electric drive unit; 31. Electric control adjustment knob; 32. Control board; 33. Miniature drive motor; 34. Transmission structure; 35. Power supply unit; 36. Charging port. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0024] In the description of this invention, it should be understood that the terms "center," "side," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Reference Figures 1 to 9 The present invention provides an adjustable rigid-flexible structure, including a substrate unit 1 and an adjustment unit 2.

[0027] The base material unit 1 is the main carrier that bears external pressure, and its actual form can be various items commonly used in daily life, with a wide variety of choices.

[0028] For example, the substrate unit 1 can be a shoe sole, or a backrest, pillow, or other structure. The adjustable soft and hard structure can adapt to various types of substrate units 1 and has a wide range of applications. Therefore, the specific form of the substrate unit 1 is not explicitly limited.

[0029] In the accompanying drawings of this embodiment, the base material unit 1 is preferably represented as the structure of a shoe sole. In actual use, the shoe sole can bear the external pressure brought by the user's own weight.

[0030] To facilitate the use of the adjustment unit 2, the base material unit 1 is preferably made of soft TPU material, but various rubber elastic materials can also be used as alternatives. Soles made of this type of material are compatible with all types of shoes, including athletic shoes, casual shoes, leather shoes, work shoes, chunky sneakers, and children's shoes. They can also adapt to different thicknesses and shapes, and are not limited by factors such as upper style, shoe height, or sole pattern.

[0031] The adjustment unit 2 can be fully or partially embedded inside the substrate unit 1, and the adjustment unit 2 is rotatably connected to the substrate unit 1. Under the action of external force, the adjustment unit 2 can rotate relative to the substrate unit 1.

[0032] In actual use, the substrate unit 1 bears the external pressure and transmits the external pressure to the adjustment unit 2.

[0033] The interior of the adjustment unit 2 forms a hollow cavity 21 and is provided with a grid structure 22 with intersecting horizontal and vertical lines.

[0034] The grid structure 22 here may further include a first support plate 221 and a second support plate 222. Multiple first support plates 221 are spaced apart, and multiple second support plates 222 are spaced apart. All the first support plates 221 and all the second support plates 222 are connected to the inner wall of the hollow cavity 21. At the same time, all the first support plates 221 and all the second support plates 222 are perpendicularly connected to each other to form the grid structure 22.

[0035] Under the above configuration, the grid structure 22 forms a centrally symmetrical structure.

[0036] In fact, since the grid structure 22 forms a centrally symmetrical structure, the grid structure 22 has the same 8 1 / 8 circles. No matter how it rotates in the circumferential direction, the actual angle adjustment range that can change the softness and hardness can be reflected in the corresponding range of any 1 / 8 circle. The force state corresponding to any angle outside the range can be specifically reflected in the corresponding range of the 1 / 8 circle.

[0037] For ease of understanding, this embodiment uses the opposite direction of the external pressure as the starting point and a circumferential range of 45° rotation in either a clockwise or counterclockwise direction as the specific angle adjustment range.

[0038] Specifically, when the adjustment unit 2 is at the starting point opposite to the direction of the external pressure application, the degree is set to 0°. At this time, the adjustment unit 2 is in the initial state of the vertical position. In this state, one of the first support plate 221 or the second support plate 222 is in a completely vertical state, and the other is in a completely horizontal state. At this time, the grid structure 22 can directly face the vertical pressure load of the substrate unit 1, maximizing the effective vertical bearing cross-sectional area and reaching the peak of the overall compressive support force. At this time, the support force of the substrate unit 1 is the strongest and the hardness is the highest.

[0039] When the adjustment unit 2 rotates, it can adjust the relative angle between the mesh structure 22 and the direction of external pressure application. When the angle of the adjustment unit 2 is in the range of 0° to 45°, the angle is gradually adjusted, and the supporting force decreases continuously. Specifically, as the tilt angle of the mesh structure 22 increases, its effective vertical bearing cross-sectional area gradually decreases, the overall supporting force continues to decrease, the deformable space of the base material unit 1 increases, and it gradually softens.

[0040] When the adjustment unit 2 is tilted at 45°, the grid structure 22 is subjected to force at a 45° angle. At this time, the effective vertical bearing cross-sectional area reaches its minimum, the structural resistance to deformation reaches its minimum, the support force is reduced to its minimum, and the flexibility of the base unit 1 reaches its maximum.

[0041] Therefore, by rotating the adjustment unit 2, the relative angle between the internal grid structure 22 and the direction of force can be changed, allowing continuous adjustment of the vertical bearing cross-sectional area and thus adjusting the support strength. This enables flexible adjustment of the hardness of the base unit 1, accommodating users of different weights and preferences, and meeting the hardness requirements of diverse scenarios such as walking, prolonged sitting, and resting. This solves the problems of narrow adaptability and poor scenario compatibility of traditional fixed-hardness structures, significantly improving the product's user comfort and ergonomic performance. The adjustment unit 2 has a simpler structure, smaller size, does not occupy space, and is convenient and quick to adjust, making it more widely applicable and possessing high promotional value.

[0042] To facilitate the connection of the adjustment unit 2, the base material unit 1 has at least one connection hole 11 in the actual pressure-bearing area. The number and location of the pressure-bearing areas can be finely selected and designed according to actual needs. At the same time, the number of connection holes 11 corresponding to each pressure-bearing area can also be selected and designed according to actual needs.

[0043] In the accompanying drawings of this embodiment, it is preferable to have a connecting hole 11 at the toe position, the forefoot position, and the heel position corresponding to the sole.

[0044] The number of adjustment units 2 corresponds to the number of connection holes 11. Each connection hole 11 is rotatably connected to an adjustment unit 2, and each adjustment unit 2 is independent of each other, forming an independent adjustment.

[0045] In actual use, all adjustment units 2 can be flexibly selected and adjusted as needed. All adjustment units 2 can be adjusted, or only a portion of them can be adjusted. Furthermore, the actual rotation angle of each adjustment unit 2 can be set individually as needed, thereby creating the same or different levels of softness and hardness in different zones.

[0046] In this embodiment, the adjustment unit 2 is preferably embodied in the form of an adjustment knob. The adjustment knob is cylindrical in shape and matches the connecting hole 11 in appearance. The adjustment knob has a hollow cavity 21 and a grid structure 22 inside, forming an integrated hollow cylindrical structure, which is easy to manufacture and also has good structural strength.

[0047] As an optional implementation, the adjustment unit 2 has one or both ends forming adjustment ends in the axial direction. The adjustment unit 2 is provided with an auxiliary rotation structure 23 at each adjustment end. External force applied to the auxiliary rotation structure 23 can drive the adjustment unit 2 to rotate.

[0048] The external forces mentioned here mainly include external forces applied manually or electrically, thus forming two adjustment methods: manual adjustment and electric adjustment.

[0049] For manual adjustment, the adjustment unit 2 can have adjustment ends at both ends in the axial direction. It should be noted that the connecting hole 11 needs to be opened through the substrate unit 1. With this setting, the two adjustment ends of the adjustment unit 2 can respectively pass through the substrate unit 1 and be located on the outside of the substrate unit 1. At this time, the two adjustment ends are exposed on both sides. The user can manually adjust the auxiliary rotation structure 23 of any one adjustment end to drive the adjustment unit 2 to rotate.

[0050] For manual adjustment, the adjustment unit 2 can also form an adjustment end at one end in the axial direction. The adjustment end of the adjustment unit 2 extends out of the substrate unit 1 and is located outside the substrate unit 1. At this time, the adjustment end is exposed on one side, and the user can manually adjust the auxiliary rotation structure 23 of the adjustment end to drive the adjustment unit 2 to rotate.

[0051] The two structural forms described above provide either a single-sided or double-sided manual operation mode, which can be flexibly selected and set according to actual needs.

[0052] For electric adjustment, the adjustable soft and hard structure also includes an electric drive unit 3, which is connected to the base material unit 1 and connected to the auxiliary rotation structure 23. When the electric drive unit 3 is activated, it can drive the adjustment unit 2 to rotate.

[0053] In this embodiment, the electric drive unit 3 preferably includes an electronically controlled adjustment knob 31, a control board 32, a micro drive motor 33, a transmission structure 34, a power supply unit 35, and a charging port 36.

[0054] An electronically controlled adjustment knob 31 is movably mounted on the outer surface of the substrate unit 1. The electronically controlled adjustment knob 31 is electrically connected to the control board 32 via wires. The control board 32 is electrically connected to the micro drive motor 33 and the power supply unit 35 via wires. The power supply unit 35 is electrically connected to the charging port 36 via wires. The power supply unit 35 can provide power, and the charging port 36 can charge the power supply unit 35. A micro drive motor 33 is provided at the corresponding position of each adjustment unit 2. The micro drive motor 33 is connected to the adjustment unit 2 via a transmission structure 34.

[0055] The electrically controlled adjustment knob 31 can rotate under external force, and its rotation angle can equally simulate the rotation angle of the adjustment unit 2. Furthermore, the electrically controlled adjustment knob 31 can transmit signals to the control board 32, which in turn sends signals to all the micro-drive motors 33. All the micro-drive motors 33 can rotate synchronously, driving the adjustment unit 2 to rotate with the assistance of the transmission structure 34. When necessary, each adjustment unit 2 can also be configured with its own electrically controlled adjustment knob 31 for individual adjustment.

[0056] In addition to the physical control method using the electronically controlled adjustment knob 31, control can also be achieved using electronic control methods such as Bluetooth, WIFI, and touch control, all of which fall within the design scope achievable in this embodiment.

[0057] In some structural configurations, the adjustment unit 2 can also integrate both manual and electric adjustment. For example, one end of the adjustment unit 2 can be set to protrude from the substrate unit 1, which becomes the manual adjustment end, while the other end is located inside the substrate unit 1 and connected to the electric drive unit 3, becoming the electric adjustment end. Integrating both manual and electric adjustment into the same structure can further enrich the basic functions of the product.

[0058] In this embodiment, there are a variety of options for the specific structural form of the auxiliary rotation structure 23. In the accompanying drawings of this embodiment, a linear rotary handle is preferably shown as the auxiliary rotation structure 23 used for manual adjustment.

[0059] When electric adjustment is required, the specific structure of the auxiliary rotation structure 23 can be further optimized according to the actual structure of the electric drive unit 3 to better adapt to the electric drive unit 3.

[0060] In the accompanying drawings of this embodiment, the auxiliary rotation structure 23 is preferably shown in the form of a straight connecting groove during the electric adjustment process. The straight connecting groove can form a good connection with the transmission structure 34, and the rotation of the adjustment unit 2 is completed under the drive of the micro drive motor 33.

[0061] As an optional implementation, a stop structure 24 is provided on the outside of the adjustment unit 2, and a mating clip 12 is provided on the base unit 1 at the corresponding position of the stop structure 24. The stop structure 24 and the mating clip 12 are movably connected. For the adjustment unit 2 that has been adjusted to the corresponding angle, the stop structure 24 can restrict its further circumferential movement, so that the adjustment unit 2 can be kept in the current position, thereby maintaining the softness and hardness corresponding to that point.

[0062] The gear position structure 24 may further include a gear position groove 241 opened on the outside of the adjustment unit 2. The gear position groove 241 is preferably located within a circumferential range that starts from the opposite direction of the external pressure and rotates 45° clockwise.

[0063] Correspondingly, when the adjustment unit 2 rotates, it actually needs to rotate in a counterclockwise direction, and its maximum rotation angle range is that it starts from the opposite direction of the external pressure and rotates 45° in a counterclockwise direction.

[0064] If the gear slot 241 is selected to rotate 45° counterclockwise as its circumferential range, then the corresponding adjustment unit 2 actually needs to rotate clockwise when it rotates.

[0065] Since the grid structure 22 of the adjustment unit 2 adopts a centrally symmetrical structure, the starting point of the gear slot 241 has multiple points that can be selected in the circumferential direction. Therefore, the starting point position and rotation direction can be flexibly selected and designed according to actual needs.

[0066] Multiple adjustment positions 242 are formed on the gear slot 241. The adjustment positions 242 can be engaged with the mating clip 12. Each adjustment position 242 corresponds to an adjustment angle. The multiple adjustment positions 242 are evenly or unevenly distributed.

[0067] The specific positions of the adjustment gears 242 can be set according to actual needs. For example, one adjustment gear 242 can be set every 1° between 0° and 45°, or one adjustment gear 242 can be set every 2° to form a uniform distribution. Alternatively, different angle ranges can be selected for adjacent adjustment gears 242 to form a non-uniform distribution. The gear structure 24 can lock the angle in the above-mentioned 0° to 45° range to realize multi-level graded adjustment of the sole hardness.

[0068] Once rotated to the correct position, the adjustment position 242 can lock with the matching locking piece 12 to fix the current angle, preventing the adjustment unit 2 from rotating on its own or shifting its angle after being stepped on during walking.

[0069] In addition, when in electric adjustment mode, the micro drive motor 33 and transmission structure 34 can also work together to lock in position, further achieving precise gear positioning.

[0070] As an optional implementation, the adjustment unit 2 is provided with a retaining ring structure 25, and the base unit 1 is provided with a mating groove 13 at the alignment position of the retaining ring structure 25. The shape of the mating groove 13 matches that of the retaining ring structure 25, and it can cover the outside of the retaining ring structure 25. The retaining ring structure 25 and the mating groove 13 form a movable rotatable connection. Without affecting the normal rotation of the adjustment unit 2, the mating groove 13 can restrict the axial displacement of the adjustment unit 2, restrict its axial movement, prevent the adjustment unit 2 from falling off the base unit 1, and ensure the long-term stable assembly of the adjustment unit 2.

[0071] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adjustable hard and soft structure, characterized in that, It includes a substrate unit (1) and an adjustment unit (2). The adjustment unit (2) is rotatably connected to the substrate unit (1). The substrate unit (1) bears external pressure and transmits the external pressure to the adjustment unit (2). The interior of the adjustment unit (2) forms a hollow cavity (21) and is provided with a cross-shaped grid structure (22). When the adjustment unit (2) rotates, it can adjust the relative angle between the grid structure (22) and the direction of the external pressure.

2. The adjustable hard and soft structure according to claim 1, characterized in that, The substrate unit (1) has at least one connection hole (11) in the pressure-bearing area, and an adjustment unit (2) is rotatably connected to each connection hole (11). The adjustment unit (2) is cylindrical and matches the connection hole (11).

3. The adjustable hard and soft structure according to claim 2, characterized in that, The adjustment unit (2) forms an adjustment end at one or both ends in the axial direction. The adjustment unit (2) is provided with an auxiliary rotation structure (23) at each adjustment end. An external force applied to the auxiliary rotation structure (23) can drive the adjustment unit (2) to rotate.

4. The adjustable hard and soft structure according to claim 3, characterized in that, The adjustment unit (2) forms adjustment ends at both ends in the axial direction, and the connection hole (11) is opened through the substrate unit (1). The two adjustment ends of the adjustment unit (2) respectively pass through the substrate unit (1) and are located on the outside of the substrate unit (1).

5. The adjustable hard and soft structure according to claim 3, characterized in that, The adjustment unit (2) forms the adjustment end at one end in the axial direction. The adjustment end of the adjustment unit (2) extends out of the substrate unit (1) and is located outside the substrate unit (1).

6. The adjustable hard-soft structure according to claim 3, characterized in that, It also includes an electric drive unit (3), which is connected to the substrate unit (1) and connected to the auxiliary rotation structure (23). When the electric drive unit (3) is started, it can drive the adjustment unit (2) to rotate.

7. The adjustable rigid-flexible structure according to claim 1, characterized in that, The grid structure (22) includes a first support plate (221) and a second support plate (222). A plurality of first support plates (221) are spaced apart, and a plurality of second support plates (222) are spaced apart. All the first support plates (221) and all the second support plates (222) are connected to the inner wall of the hollow cavity (21). All the first support plates (221) and all the second support plates (222) are perpendicularly connected to each other to form the grid structure (22).

8. The adjustable hard and soft structure according to claim 1, characterized in that, The adjustment unit (2) is provided with a gear structure (24) on its outer side. The base material unit (1) is provided with a mating clip (12) at the corresponding position of the gear structure (24). The gear structure (24) is movably connected to the mating clip (12). The gear structure (24) can restrict the circumferential movement of the adjustment unit (2) that has been adjusted to the corresponding angle.

9. The adjustable hard and soft structure according to claim 8, characterized in that, The gear structure (24) includes a gear slot (241) opened on the outside of the adjustment unit (2). The gear slot (241) is located within a circumferential range that starts from the opposite direction of the external pressure and rotates 45° clockwise or counterclockwise. Multiple adjustment gears (242) are formed on the gear slot (241). The adjustment gears (242) can be engaged with the mating clip (12). Each adjustment gear (242) corresponds to an adjustment angle. The multiple adjustment gears (242) are evenly or unevenly distributed.

10. The adjustable hard-soft structure according to claim 1, characterized in that, The adjustment unit (2) is provided with a retaining ring structure (25), and the base material unit (1) is provided with a matching groove (13) at the alignment position of the retaining ring structure (25). The retaining ring structure (25) is movably connected with the matching groove (13), and the matching groove (13) can limit the axial displacement of the adjustment unit (2).

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