Doll blank with unchanged gravity center in autorotation process and doll handicraft

Abstract

The utility model provides a doll blank with the gravity center unchanged in the autorotation process and a doll handicraft. The doll blank body at least comprises a first main body part, a second main body part and a center line, the first main body part and the second main body part are connected at a seam, the cross section corresponding to any point on the doll blank body is circular, and the circle center of the cross section is located on the center line, and the first main body part of the doll blank body comprises a top and an upper body part; the maximum cross section of the upper body part corresponds to the first diameter; the maximum cross section on the second main body part corresponds to the second diameter; the ratio of the difference between the first diameter and the second diameter to the overall height of the doll blank is smaller than or equal to a first preset value; in the direction of the center line, the diameter of the cross section of the upper body part is equal to the first diameter, the diameter of the cross section of the second body part is equal to the second diameter, and the ratio of the distance between circle centers corresponding to the two farthest cross sections to the overall height of the doll blank is larger than 5%.

Description

Technical Field

[0001] The present application relates to an artistic craft, and specifically to a nesting doll embryo and a nesting doll craft whose center of gravity remains unchanged during rotation. Background Art

[0002] Matryoshka is a traditional set of handicrafts, also known as "little nesting figures" or "nesting dolls". The Russian word for matryoshka is "Матрёшка", which means "mother of the family" in ancient Greek. It usually consists of a set of dolls of different sizes, each of which can be opened to fit a doll smaller than itself. To make excellent matryoshka handicrafts, the raw materials need to be strictly selected. In terms of production process, the wood is dried and made into blanks. The painter also needs to draw exquisite patterns on the surface of the blanks, and finally evenly apply varnish to protect the patterns. Since the production of matryoshkas is highly dependent on manual labor, it is costly and time-consuming, which limits the production efficiency of matryoshkas and the expansion of the matryoshka market. In addition, the matryoshkas become smaller from the outside to the inside, and the difficulty of drawing or transferring the inner matryoshkas in a limited space also increases accordingly, and the exquisiteness of the inner matryoshkas is greatly reduced.

[0003] Some manufacturers use transfer stickers to simplify the production process. However, this method still relies on manual fixing of stickers and transfer stickers. Not only is the production efficiency low, but the resolution is also very limited. It can only produce simple patterns and cannot meet the needs of high-resolution photo-level patterns. Since stickers are usually prepared in batches, they cannot meet users' low-cost and personalized customization needs.

[0004] In order to improve efficiency and reduce production difficulty, some manufacturers have also tried to use machine spraying. At present, the technology of machine spraying of nesting dolls is very immature. The coating of the nesting dolls produced is uneven, the pattern is unclear, and multiple dolls cannot be printed at the same time. Specifically, the appearance of the nesting dolls mostly imitates cartoons or animals, with simple patterns that do not require high resolution, and imitates the head and body through changes in the outer contour lines. Usually, except for the innermost layer of nesting dolls, each layer of nesting dolls can accommodate smaller nesting dolls than itself after disassembly in the first main body part and the second main body part. Therefore, the cross-section of the nesting doll has the largest diameter at the seam of the first main body part and the second main body part.

[0005] Figure 1A nesting doll disclosed in (CN201264465Y) is shown in the figure, wherein the nesting doll shell 1' is egg-shaped, and comprises an upper and a lower part, a support base 4' is arranged at the bottom of the lower shell 2', and a pattern layer is arranged on the outer layer of each shell; the nesting doll shell is symmetrical along the center line H', and the cross section cut at any point along the center line H' is circular: when observed from the front of the nesting doll, the diameter of the cross section corresponding to the shell 1' changes from small to large along the center line H' from top to bottom at the upper part of the shell 1', and the cross section has the largest diameter at the joint 3' of the upper and lower shells; the diameter of the cross section corresponding to the shell changes from large to small along the center line from top to bottom at the lower part 2' of the shell, and has the smallest diameter at the support base 4'.

[0006] Before the machine sprays, the embryo is placed on the support device; when spraying begins, the nesting doll embryo will rotate around the center line at a predetermined speed under the action of the support device. While rotating, the paint nozzle sprays to a predetermined position to form a predetermined pattern or coating. In practice, the nesting doll embryo in the prior art will inevitably produce irregular changes in the center of gravity and deviate from the predetermined position as the support wheel rotates, which will cause a deviation between the actual position of the paint spraying and the preset position, resulting in a distorted sprayed pattern and poor printing effect.

[0007] In order to prevent the doll body from deflecting during machine spraying, some manufacturers use clamping devices at both ends of the body to reduce the irregular rotation of the doll body. However, there will be a large error if it is clamped by naked eyes and manually, and it is impossible to ensure that the center line at both ends of the clamping device completely coincides with the H center line of the doll, resulting in irregular revolution during the rotation printing process, causing a deviation between the actual position of the paint spraying and the preset position, resulting in distorted spraying patterns and poor printing effects. In addition, since the printer nozzle can only move between the clamping devices, this solution can only print a single doll. For the commonly used nesting dolls with a maximum cross-sectional diameter of 8 mm to 30 mm, this solution cannot print a full circle on the side at one time, resulting in the pattern on the top and upper body of the nesting doll being cut off, which destroys the viewing experience; and each embryo needs to be fixed and disassembled by manpower before and after printing, resulting in very limited production efficiency; to achieve batch printing, some producers choose to punch holes at both ends of the embryo and pass the fixed shaft through multiple nesting doll embryos at the same time, but the punching operation not only destroys the handicraft itself, but also adds additional punching and fixing processes, which not only affects the appearance of the product but also reduces production efficiency. Utility Model Content

[0008] In view of this, the present application proposes a nesting doll embryo and a nesting doll craft that use UV printing and keep the center of gravity unchanged during the rotation process. The present application improves the structure of the nesting doll embryo so that the center of gravity remains unchanged during the printing and rotation process, ensuring the accuracy of the spraying position and the amount of pigment. The nesting doll embryo of the present application can be used in conjunction with a UV printer to automatically and evenly spray a predetermined pattern in batches. The patterns of the nesting doll crafts produced are uniform and clear, which effectively improves production efficiency, and there is no need to set up a separate process for applying transparent varnish; the products produced are no longer limited by the painting skills of the craftsmen, and a variety of products can be produced; at the same time, compared with the prior art, the resolution of the image has been significantly improved, meeting the personalized customization needs of low-cost one-set orders and high-resolution real-life photos. Even the surface pattern of the innermost nesting doll is very delicate and lovely.

[0009] On the one hand, the present application provides a nesting doll embryo whose center of gravity remains unchanged during rotation, the nesting doll embryo comprising at least a first main body part (1), a second main body part (2) and a center line (H), the first main body part (1) and the second main body part (2) being connected at a joint (3), the cross section corresponding to any point on the nesting doll embryo being circular and the center of the circle being located on the center line (H), characterized in that the first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102), the maximum cross section on the upper body part (102) corresponds to a first diameter (R1); the maximum cross section on the second main body part (2) corresponds to a second diameter (R2); the ratio of the difference between the first diameter (R1) and the second diameter (R2) to the overall height (L) of the nesting doll embryo is less than or equal to a first preset value;

[0010] Along the center line (H), the ratio of the distance between the centers of the two farthest cross sections corresponding to the cross-sectional diameter of the upper body (102) equal to the first diameter (R1) and the cross-sectional diameter of the second main body (2) equal to the second diameter (R2) to the overall height (L) of the nesting doll embryo is greater than 5%.

[0011] Furthermore, the nesting doll body is made of plastic or resin, and the first preset value is 5%; or the nesting doll body is made of wood, and the first preset value is 1%.

[0012] Furthermore, the second main body portion (2) comprises a lower body portion (201), and the lower body portion (201) comprises a first lower body portion (2011) and a second lower body portion (2012), wherein a ratio of a height of the first lower body portion (2011) to a height of the lower body portion (201) is greater than one third.

[0013] Further, when the arc height (A) of the top (101) is between 0 mm and 100 mm, the top (101) and the upper body (102) are printed separately, and the patterns printed on the top (101) and the upper body (102) are connected and overlapped with each other.

[0014] Furthermore, when the arc height (A) of the top (101) is greater than or equal to 20 mm, the top cover portion (1011) and the top side surface (1012) of the top (101) are printed separately, wherein the patterns printed at the connection between the top cover portion (1011) and the top side surface (1012) are connected and overlap each other.

[0015] Furthermore, the first main body portion (1) forms a first angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the first angle is less than 30 degrees;

[0016] and / or the second main body portion (2) forms a second angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the second angle is less than 30 degrees;

[0017] When the first main body part (1) and the second main body part (2) simultaneously form an angle at the joint, the sum of the first angle and the second angle is less than 60 degrees.

[0018] Furthermore, the maximum cross-sectional diameter of the nesting doll embryo is between 8 mm and 30 mm.

[0019] Furthermore, the surface color of the nesting doll embryo before printing is white.

[0020] Furthermore, the ratio of the difference between any two cross-sectional diameters of the upper body (102) to the first diameter (R1) is less than or equal to one percent;

[0021] And / or the second main body portion (2) includes a lower body portion (201), the lower body portion (201) includes a first lower body portion (2011) and a second lower body portion (2012), wherein the ratio of the difference between any two cross-sectional diameters on the first lower body portion (2011) to the second diameter (R2) is less than or equal to one percent.

[0022] On the other hand, the present application also proposes another nesting doll embryo whose center of gravity remains unchanged during rotation, the nesting doll embryo at least comprising a first main body part (1), a second main body part (2) and a center line (H), the first main body part (1) and the second main body part (2) being connected at a joint (3), the cross section corresponding to any point on the nesting doll embryo being circular and the center of the circle being located on the center line (H), and characterized in that the first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102), the maximum cross section on the upper body part (102) being The first diameter (R1) corresponds to the second largest cross section on the upper body (102) and the third diameter (R3); the ratio of the difference between the first diameter (R1) and the third diameter (R3) to the overall height (L) of the nesting doll embryo is less than or equal to a second preset value; along the center line (H), the ratio of the distance between the centers of the two most distant cross sections of the upper body (102) whose cross section diameters are equal to the first diameter (R1) and whose cross section diameters are equal to the third diameter (R3) to the overall height (L) of the nesting doll embryo is greater than 5 percent;

[0023] and / or the maximum cross section on the second main body part (2) corresponds to the second diameter (R2), and the second maximum cross section on the second main body part (2) corresponds to the fourth diameter (R4), wherein the ratio of the difference between the second diameter (R2) and the fourth diameter (R4) to the overall height (L) of the nesting doll embryo is less than or equal to a third preset value; and along the center line (H), the ratio of the distance between the centers of the two most distant cross sections of the second main body part (2) whose cross section diameter is equal to the second diameter (R2) and whose cross section is equal to the fourth diameter (R4) to the overall height (L) of the nesting doll embryo is greater than 5%.

[0024] Furthermore, when the nesting doll body is made of plastic or resin, the second preset value and / or the third preset value is 5%; when the nesting doll body is made of wood, the second preset value and / or the third preset value is 1%.

[0025] Furthermore, the second main body portion (2) comprises a lower body portion (201), and the lower body portion (201) comprises a first lower body portion (2011) and a second lower body portion (2012), wherein a ratio of a height of the first lower body portion (2011) to a height of the lower body portion (201) is greater than one third.

[0026] Furthermore, the first main body part (1) of the nesting doll embryo includes a top part (101) and an upper body part (102). When the arc height (A) of the top part (101) is between 0 mm and 100 mm, the top part (101) and the upper body part (102) are printed separately, and the patterns printed on the top part (101) and the upper body part (102) are connected and overlapped with each other.

[0027] Furthermore, when the arc height (A) of the top (101) is greater than or equal to 20 mm, the top cover portion (1011) and the top side surface (1012) of the top (101) are printed separately, wherein the patterns printed at the connection between the top cover portion (1011) and the top side surface (1012) are connected and overlap each other.

[0028] Furthermore, the first main body portion (1) forms a first angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the first angle is less than 30 degrees;

[0029] and / or the second main body portion (2) forms a second angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the second angle is less than 30 degrees;

[0030] When the first main body part (1) and the second main body part (2) simultaneously form an angle at the joint, the sum of the first angle and the second angle is less than 60 degrees.

[0031] Furthermore, the maximum cross-sectional diameter of the nesting doll embryo is between 8 mm and 30 mm.

[0032] Furthermore, before the nesting doll embryo is printed, the surface color of the nesting doll is white.

[0033] Furthermore, the first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102), and the ratio of the difference between any two cross-sectional diameters of the upper body part (102) to the first diameter (R1) is less than or equal to 1 percent;

[0034] And / or the second main body portion (2) includes a lower body portion (201), the lower body portion (201) includes a first lower body portion (2011) and a second lower body portion (2012), wherein the ratio of the difference between any two cross-sectional diameters on the first lower body portion (2011) to the second diameter (R2) is less than or equal to one percent.

[0035] On the other hand, the present application also proposes a nesting doll craft, which uses the aforementioned nesting doll embryo. In the nesting doll craft, at least two layers of nesting dolls use the nesting doll embryo.

[0036] The nesting doll crafts processed by the present application do not need to stop during the printing process. For nesting dolls with cross-sectional diameters between 8 mm and 400 mm, the side surfaces can be printed in batches in a full circle at one time; for nesting dolls with arc heights A between 0 mm and 100 mm, when colored paint or transparent varnish is sprayed on the top, the coverage is wide and the spraying is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to make the technical problems solved, the technical means adopted and the technical effects achieved by the embodiments of the present application clearer, the specific embodiments of the embodiments of the present application will be described in detail with reference to the accompanying drawings. However, it should be noted that the drawings described below are only drawings of exemplary embodiments of the embodiments of the present application. For those skilled in the art, drawings of other embodiments can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a schematic diagram of the structure of a layer of nesting dolls in the prior art.

[0039] Figure 2 It is a schematic diagram of the structure of a layer of nesting dolls in one embodiment of the present application.

[0040] Figure 3 It is a schematic diagram of the structure of a layer of nesting dolls in one embodiment of the present application.

[0041] Figure 4A , Figure 4B , Figure 4C yes Figure 3 A partial enlarged view of the joint 3.

[0042] Figure 5 It is a comparison diagram between a small-sized nesting doll craft in an embodiment of the present application and a nesting doll craft in the prior art.

[0043] Figure 6 It is a comparison diagram between a nesting doll craft in another embodiment of the present application and a nesting doll craft in the prior art.

[0044] Figure markings: 1' nesting doll shell, 2' lower shell, 3' seam, 4' supporting base, H' center line, 1 first main body part, 101 top, 1011 top cover part, 1012 top side, 102 upper body part, 2 second main body part, 201 lower body part, 2011 first lower body part, 2012 second lower body part, 202 bottom, 3 seam, H center line. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of this application more clear, the following is a further detailed description of this application in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain this application and do not limit the scope of protection of this application.

[0046] Under the premise of being consistent with the technical concept of the embodiments of the present application, the features, structures, characteristics or other details described in a specific embodiment do not exclude that they can be combined in one or more other embodiments in a suitable manner.

[0047] In the description of specific embodiments, the features, structures, characteristics or other details described in the embodiments of the present application are intended to enable those skilled in the art to fully understand the embodiments. However, it does not exclude that those skilled in the art can practice the technical solutions of the embodiments of the present application without one or more of the specific features, structures, characteristics or other details.

[0048] It should be understood that although the terms first, second, third, etc. may be used herein to describe various devices, elements, components, or parts, this should not be limited by these terms. These terms are used to distinguish one from another. For example, a first device may also be called a second device without departing from the essential technical solution of the embodiments of the present application.

[0049] The term "and / or" or "and / or" includes any one and all combinations of one or more of the associated listed items.

[0050] In order to prevent the nesting doll embryo from rotating away from the center of gravity as the support wheel rotates, the applicant tried to improve the support structure. However, through experiments, it was found that only improving the support device could not achieve synchronous angular displacement, nor could it keep the center of gravity unchanged during the rotation process, and slipping occurred during the printing process, and its application scenarios were limited.

[0051] In practice, it is found that when there is too much drop in the side curve of the nesting doll body, the droplets of the coating are easy to spread, resulting in uneven coating and unclear patterns. In this embodiment, when the difference in the diameter of the cross section corresponding to any two points of the nesting doll body is controlled within a preset value, the uniformity of machine coloring and spraying varnish and the clarity of the pattern can be greatly improved. At the same time, the diameter difference within the preset value range does not affect the stable contact between the nesting doll body and the support structure, and the nesting doll body can still be driven by the shaft to achieve stable concentric rotation, ensuring the printing effect.

[0052] This application proposes a Figure 2The nesting doll embryo shown. The nesting doll embryo at least includes a first main body part 1, a second main body part 2 and a center line H. The first main body part 1 and the second main body part 2 are detachably connected at a joint 3, and can accommodate a nesting doll of a smaller size than itself after being separated; wherein the first main body part 1 and the second main body part 2 of the nesting doll are symmetrical along the center line H, that is, the cross section corresponding to any point on the nesting doll embryo is circular and the center of the circle is located on the center line H, the first main body part 1 of the nesting doll embryo includes a top 101 and an upper body part 102, and the diameter corresponding to the maximum cross section on the upper body part 102 is R1 (also called "first diameter"). Similarly, the diameter corresponding to the maximum cross-section on the second main body part 2 is R2 (also called the "second diameter"); the ratio of the difference between the first diameter R1 and the second diameter R2 to the overall height L of the nesting doll embryo is less than or equal to a preset value; illustratively, the diameter corresponding to the maximum cross-section on the upper body 102 is R1, and the diameter corresponding to the maximum cross-section on the second main body part is R2. For the two cross-sections farthest apart in the cross-section in the first main body part 1 with a cross-sectional diameter equal to R1 and the cross-section in the second main body part 2 with a cross-sectional diameter equal to R2, the ratio of the distance between their corresponding center points to the overall height L of the nesting doll embryo is greater than five percent.

[0053] When the nesting doll embryo with the above structure is used for UV printing, the side of the nesting doll embryo is placed horizontally on the transmission shaft of the printer. During the process of the transmission shaft supporting and driving the nesting doll to rotate, the center of gravity position of the embryo can remain stable, that is, the spatial relative position of the center line of the nesting doll embryo and the transmission shaft can always remain unchanged.

[0054] Optionally, the diameter corresponding to the second largest cross section on the upper body 102 of the first main body portion 1 of the nesting doll embryo is R3 (also called the "third diameter"); wherein the ratio of the difference between the first diameter R1 and the third diameter R3 to the overall height L of the nesting doll embryo is less than or equal to a preset value; along the center line H, among all cross sections with cross-sectional diameters equal to R1 and R3, the ratio of the distance between the centers of the two farthest cross sections to the overall height L of the nesting doll embryo is greater than 5%;

[0055] Optionally, the diameter corresponding to the maximum cross section on the second main body part 2 of the nesting doll embryo is R2, and the diameter corresponding to the second maximum cross section is R4 (also called the "fourth diameter"). The ratio of the difference between the second diameter R2 and the fourth diameter R4 to the overall height L of the nesting doll embryo is less than or equal to a preset value; along the center line H, among all cross sections corresponding to cross sections with cross section diameters equal to R2 and R4, the ratio of the distance between the centers of the two farthest cross sections to the overall height L of the nesting doll embryo is greater than 5%.

[0056] When the nesting doll embryos of the above two structures are used for UV printing, the first main body part 1 and the second main body part 2 can be printed separately to avoid the paint from solidifying and sticking at the joint 3; and there is no need to set up a separate process for applying transparent varnish, which simplifies the process and reduces production costs.

[0057] Furthermore, in the prior art, nesting dolls are mostly made of solid wood, which not only causes a waste of forest resources, but also has the following disadvantages: it is easy to mold in wet seasons and crack in dry seasons; sawdust and dust are easy to remain on the nesting dolls during processing, affecting respiratory health; the finished product is easy to retain small burrs and pierce the skin. The material of the nesting doll embryo of the present application can be non-wood, such as plastic, specifically resin, ABS, PC, etc., and the above-mentioned disadvantages can be overcome by replacing the material, reducing the cost of raw materials and being more environmentally friendly. When the nesting doll embryo is made of plastic or resin material, the preset value is 5%; when the nesting doll embryo is made of wood, the preset value is 1%.

[0058] Further, assuming that there is a point A1 on the side of the first main body part 1 (such as the upper body 102), the cross-sectional diameter corresponding to the point A1 is equal to R1 and is farthest from the joint 3 along the center line H; assuming that there is a point B1 on the side of the second main body part 2, the cross-sectional diameter corresponding to the point B1 is equal to R2 and is farthest from the joint 3 along the center line H, then the ratio of the height difference between the point A1 and the point B1 to the overall height L of the doll embryo is greater than 5%. When the doll embryo of the aforementioned structure rotates driven by the support structure, the force is more balanced and can rotate stably.

[0059] Optionally, the present application may use a cylindrical support shaft. Specifically, during processing, the nesting doll embryo is placed between the left and right support shafts; driven by the rotating shaft, the nesting doll embryo rotates at the same angle to achieve self-rotation with a constant center of gravity.

[0060] Preferably, the second body portion 2 further comprises a lower body portion 201, and the lower body portion 201 comprises a first lower body portion 2011 and a second lower body portion 2012, wherein the ratio of the height of the first lower body portion 2011 to the lower body portion 201 is greater than one third. The corresponding cross-sectional diameters of the first lower body portion 2011 are substantially the same, and the corresponding cross-sectional diameters of the second lower body portion 2012 are not limited in this application.

[0061] Preferably, the top 101 and the upper body 102 of the nesting doll body are smoothly connected. The top 102 of the nesting doll body can be an arc structure or a flat top structure. Figure 1 and Figure 3 As shown in FIG. 1 , when viewed from the front of the nesting doll, the nesting doll top 102 is a structure with a high top and low sides; Figure 2As shown, when viewed from the front of the nesting doll, a section of the contour line of the nesting doll top 102 is parallel to the cross section of the nesting doll body until it changes into an arc at the transition position where it connects with the upper body 102. For example, the cross-sectional diameter corresponding to the top 101 may gradually decrease as it moves away from the seam 3; along the centerline H direction, the arc height of the top 101 is A.

[0062] When the arc height A of the top 101 is between 0 mm and 100 mm, the top 101 and the upper body 102 are printed separately, and the patterns printed on the top 101 and the upper body 102 are connected and overlapped with each other to achieve a natural transition and ensure the aesthetics of the printed pattern (e.g. Figure 3 (shown in the shaded area S in the middle).

[0063] In practice, it is found that when the arc height A of the top 101 exceeds 20 mm, the height difference exceeds the working distance of the UV printer nozzle, and high-resolution patterns cannot be printed. Furthermore, when the arc height A of the top 101 is greater than or equal to 20 mm, the top 101 can be printed separately. Specifically: the top 101 is divided into two areas, the top cover 1011 and the top side 1012, and printed separately, wherein the area ratio of the top cover 1011 and the top side 1012 can be adjusted according to actual conditions; similar to the separate printing technology mentioned above, the patterns printed at the connection between the top cover 1011 and the top side 1012 are connected and overlapped to avoid blank space at the connection, thereby ensuring the printing effect.

[0064] Optionally, the second main body part 2 also includes a base part, and the lower body part 201 is smoothly connected to the base part. Preferably, when viewed from the front of the nesting doll, the contour line of the bottom 202 of the base part is parallel to the cross section of the nesting doll embryo, so that the nesting doll can be placed stably and not easily tipped over.

[0065] The nesting doll craftwork includes an innermost nesting doll and multiple outer nesting dolls, wherein the outer nesting doll is a hollow structure consisting of a detachable first part and a second part. The innermost nesting doll can be a solid structure or a hollow structure similar to the outer nesting doll, which is not limited in the present application.

[0066] Optionally, any layer of the nesting doll craftwork can adopt any of the aforementioned nesting doll embryos, and the structure of each layer of nesting dolls can be completely the same, partially the same, or different. Each layer of nesting dolls can be adjusted according to the actual design, as long as the inner layer of nesting dolls can be accommodated in the outer layer of nesting dolls, and this application does not limit it.

[0067] In the prior art, affected by factors such as weather, humidity, geographical environment and processing technology, the first main body part and the second main body part may deform (shrink) at the joint and fail to form a tight connection. The gap at the joint not only affects the appearance, but also fails to ensure the stability of the connection. The deformation (expansion) at the joint can also increase the friction and make it difficult to open. Preferably, the first main body part 1 and / or the second main body part form an angle at the joint along the vertical direction of the center line H toward the inside of the nesting doll embryo. When the angle is formed on one side of the first main body part 1 or the second main body part, the angle is less than 30°; when the first main body part 1 and the second main body part form an angle at the joint at the same time, the sum of the two angles is less than 60°; by setting the angle at the joint, it is ensured that no excessive deformation occurs at the joint.

[0068] For example, Figure 3 The enlarged view of the joint 3 is as follows Figure 4A , Figure 4B , Figure 4C Shown: In Figure 4A The first main part 1 forms a first angle а along the vertical direction of the center line H toward the inside of the nesting doll embryo, and the second main part 2 forms a second angle β along the vertical direction of the center line H toward the inside of the nesting doll embryo, wherein the sum of the first angle а and the second angle β is less than 60 degrees.

[0069] exist Figure 4B The first angle а is 0 degree, and the second angle β is preferably less than 30 degrees.

[0070] exist Figure 4C The second angle β is 0 degree, and the first angle a is preferably less than 30 degrees.

[0071] Optionally, the maximum cross-sectional diameter of the nesting doll embryo is between 8 mm and 30 mm. The nesting doll embryo structure of the prior art cannot be printed using UV. The structure of the present application can be applied to UV printing to improve accuracy.

[0072] Optionally, the surface color of the nesting doll embryo body before printing is white. Setting the surface to white improves color reproduction and pattern clarity, and can save the amount of white paint and save printing time.

[0073] Optionally, the ratio of the difference between any two cross-sectional diameters of the upper body portion 102 to the first diameter R1 is less than or equal to 1 percent.

[0074] Furthermore, the ratio of the difference between any two cross-sectional diameters on the first lower body portion 2011 of the second main body portion 2 to the second diameter R2 is less than or equal to one percent.

[0075] In this embodiment, when the difference in diameter of the cross section corresponding to any two points of the upper body 102 and / or the first lower body 2011 and the ratio of the first diameter R1 / the second diameter R2 are controlled to be less than or equal to 1%, the uniformity and clarity of the embryo pigment and varnish can be improved. At the same time, it can also ensure that the nesting doll embryo can achieve stable rotation driven by the shaft to ensure the printing effect. For the standard rectangular plane pattern in the customer's mobile phone or camera, the present application can print the main pattern of the photo on the upper body 102 and the first lower body 2011, eliminating the pattern deformation caused by the cross sections of different circumferences of traditional nesting dolls.

[0076] Optionally, the set of handicrafts can be 3 layers, 5 layers or more. The number of layers of the set of handicrafts can be adjusted according to the actual design, and this application does not limit it.

[0077] like Figure 5-6 As shown, the small-sized nesting dolls ( Figure 5 Right) Compared with the existing technology ( Figure 5 Left) has the following advantages: when the nesting doll embryo of the prior art is used for printing, the center of gravity cannot be kept constant, resulting in misalignment and blurring of the pattern; in particular, the nesting doll with a maximum cross-sectional diameter of less than 30 mm needs to be rotated manually many times during the printing process, and the error gradually accumulates with the number of rotations, resulting in a rough and deformed pattern; on the other hand, the nesting doll crafts prepared by the present application ( Figure 6 ), which can not only print fine, high-resolution patterns, but also maintain the same high-quality printing effect even for the smallest size nesting dolls.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A nesting doll embryo whose center of gravity remains unchanged during rotation, the nesting doll embryo comprising at least a first main body part (1), a second main body part (2) and a center line (H), the first main body part (1) and the second main body part (2) being connected at a joint (3), the cross section corresponding to any point on the nesting doll embryo being circular and the center of the circle being located on the center line (H), characterized in that: The first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102), the maximum cross section of the upper body part (102) corresponds to a first diameter (R1); the maximum cross section of the second main body part (2) corresponds to a second diameter (R2); the ratio of the difference between the first diameter (R1) and the second diameter (R2) to the overall height (L) of the nesting doll embryo is less than or equal to a first preset value; Along the center line (H), the ratio of the distance between the centers of the two farthest cross sections corresponding to the cross-sectional diameter of the upper body (102) being equal to the first diameter (R1) and the cross-sectional diameter of the second main body (2) being equal to the second diameter (R2) to the overall height (L) of the nesting doll embryo is greater than 5 percent.

2. The nesting doll embryo as claimed in claim 1, characterized in that: If the nesting doll body is made of plastic or resin, the first preset value is 5%; or if the nesting doll body is made of wood, the first preset value is 1%.

3. The nesting doll embryo as claimed in claim 1, characterized in that: The second main body portion (2) comprises a lower body portion (201), wherein the lower body portion (201) comprises a first lower body portion (2011) and a second lower body portion (2012), wherein a ratio of a height of the first lower body portion (2011) to a height of the lower body portion (201) is greater than one third.

4. The nesting doll embryo as claimed in claim 1, characterized in that: When the arc height (A) of the top portion (101) is between 0 mm and 100 mm, the top portion (101) and the upper body portion (102) are printed separately, and the patterns printed on the top portion (101) and the upper body portion (102) are connected and overlap each other.

5. The nesting doll embryo as claimed in claim 4, characterized in that: When the arc height (A) of the top (101) is greater than or equal to 20 mm, the top cover portion (1011) and the top side surface (1012) of the top (101) are printed separately, wherein the patterns printed at the connection between the top cover portion (1011) and the top side surface (1012) are connected and overlap each other.

6. The nesting doll embryo according to any one of claims 1 to 5, characterized in that: The first main body portion (1) forms a first angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the first angle is less than 30 degrees; and / or the second main body portion (2) forms a second angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the second angle is less than 30 degrees; When the first main body part (1) and the second main body part (2) simultaneously form an angle at the joint, the sum of the first angle and the second angle is less than 60 degrees.

7. The nesting doll embryo according to any one of claims 1 to 5, characterized in that: The maximum cross-sectional diameter of the nesting doll embryo is between 8 mm and 30 mm.

8. The nesting doll embryo according to any one of claims 1 to 5, characterized in that: The surface color of the nesting doll embryo before printing is white.

9. The nesting doll embryo according to any one of claims 1 to 5, characterized in that: The ratio of the difference between any two cross-sectional diameters of the upper body (102) to the first diameter (R1) is less than or equal to 1 percent; And / or the second main body portion (2) includes a lower body portion (201), the lower body portion (201) includes a first lower body portion (2011) and a second lower body portion (2012), wherein the ratio of the difference between any two cross-sectional diameters on the first lower body portion (2011) to the second diameter (R2) is less than or equal to one percent.

10. A nesting doll embryo whose center of gravity remains unchanged during rotation, the nesting doll embryo comprising at least a first main body part (1), a second main body part (2) and a center line (H), the first main body part (1) and the second main body part (2) being connected at a joint (3), the cross section corresponding to any point on the nesting doll embryo being circular and the center of the circle being located on the center line (H), characterized in that: The first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102); the maximum cross section on the upper body part (102) corresponds to a first diameter (R1), and the second maximum cross section on the upper body part (102) corresponds to a third diameter (R3); the ratio of the difference between the first diameter (R1) and the third diameter (R3) to the overall height (L) of the nesting doll embryo is less than or equal to a second preset value; along the center line (H), the ratio between the distance between the centers of the two most distant cross sections of the upper body part (102) whose cross section diameters are equal to the first diameter (R1) and whose cross section diameters are equal to the third diameter (R3) to the overall height (L) of the nesting doll embryo is greater than 5 percent; and / or the maximum cross section on the second main body part (2) corresponds to the second diameter (R2), and the second maximum cross section on the second main body part (2) corresponds to the fourth diameter (R4), wherein the ratio of the difference between the second diameter (R2) and the fourth diameter (R4) to the overall height (L) of the nesting doll embryo is less than or equal to a third preset value; along the center line (H), the ratio of the distance between the centers of the two most distant cross sections of the second main body part (2) whose cross-sectional diameters are equal to the second diameter (R2) and whose cross sections are equal to the fourth diameter (R4) to the overall height (L) of the nesting doll embryo is greater than 5 percent.

11. The nesting doll embryo as claimed in claim 10, characterized in that: When the nesting doll body is made of plastic or resin, the second preset value and / or the third preset value is 5%; when the nesting doll body is made of wood, the second preset value and / or the third preset value is 1%.

12. The nesting doll embryo as claimed in claim 10, characterized in that: The second main body portion (2) comprises a lower body portion (201), wherein the lower body portion (201) comprises a first lower body portion (2011) and a second lower body portion (2012), wherein a ratio of a height of the first lower body portion (2011) to a height of the lower body portion (201) is greater than one third.

13. The nesting doll embryo as claimed in claim 10, characterized in that: The first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102); when the arc height (A) of the top part (101) is between 0 mm and 100 mm, the top part (101) and the upper body part (102) are printed separately, and the patterns printed on the top part (101) and the upper body part (102) are connected and overlapped with each other.

14. The nesting doll embryo as claimed in claim 13, characterized in that: When the arc height (A) of the top (101) is greater than or equal to 20 mm, the top cover portion (1011) and the top side surface (1012) of the top (101) are printed separately, wherein the patterns printed at the connection between the top cover portion (1011) and the top side surface (1012) are connected and overlap each other.

15. The nesting doll embryo according to any one of claims 10 to 13, characterized in that: The first main body portion (1) forms a first angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the first angle is less than 30 degrees; and / or the second main body portion (2) forms a second angle along the vertical direction of the center line (H) toward the inner side of the nesting doll embryo, and the second angle is less than 30 degrees; When the first main body part (1) and the second main body part (2) simultaneously form an angle at the joint, the sum of the first angle and the second angle is less than 60 degrees.

16. The nesting doll embryo according to any one of claims 10 to 13, characterized in that: The maximum cross-sectional diameter of the nesting doll embryo is between 8 mm and 30 mm.

17. The nesting doll embryo according to any one of claims 10 to 13, characterized in that: Before the nesting doll embryo is printed, the surface color of the nesting doll is white.

18. The nesting doll embryo according to any one of claims 10 to 13, characterized in that: The first main body part (1) of the nesting doll embryo comprises a top part (101) and an upper body part (102), and the ratio of the difference between any two cross-sectional diameters of the upper body part (102) to the first diameter (R1) is less than or equal to 1 percent; And / or the second main body portion (2) includes a lower body portion (201), the lower body portion (201) includes a first lower body portion (2011) and a second lower body portion (2012), wherein the ratio of the difference between any two cross-sectional diameters on the first lower body portion (2011) to the second diameter (R2) is less than or equal to one percent.

19. A nesting doll craft, characterized in that: It uses the nesting doll embryo as described in any one of claims 1 to 18, and in the nesting doll craftwork, at least two layers of nesting dolls use the nesting doll embryo.

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