Toy component for model toy

Abstract

To properly diversity a posture for which a doll body can be formed, and also to materialize it with a comparatively simple structure.SOLUTION: The present invention relates to a joint structure, which is the joint structure of a doll body composed of a chest, an abdominal part and a lumber part. The abdominal part and the lumbar part are connected separably from each other, and the abdominal part is a first part which is vertically extended in the central part. The component includes the first part which is arranged in a manner freely insertable and removable from the lumbar part side in a state where the abdominal part and the lumbar part are separated from each other, and includes a pair of second parts which is arranged on both sides of the first part and is rotatably connected for the chest.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the joint structure of a humanoid body.

Background Art

[0002] Patent Document 1 describes providing joint structures at various parts of a humanoid body such as the torso, arms, and legs. A user can pose such a humanoid body in a desired posture, for example, a forward-bent posture.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Among humanoid bodies, there are some that can form various postures, and it may be required that any posture be appropriately realized (without a sense of discomfort). In general, however, as the variety of postures of a humanoid body increases, the structure tends to become more complex.

[0005] An exemplary object of the present invention is to appropriately diversify the postures that a humanoid body can form and to achieve this with a relatively simple configuration.

Means for Solving the Problems

[0006] One aspect of the present invention relates to a joint structure, and the joint structure is a joint structure of a humanoid body including a chest, an abdomen, and a waist, wherein the abdomen and the waist are separably connected to each other, the abdomen is a first part extending vertically at a central portion, and the first part is arranged to be insertable and removable from the waist side in a state where the abdomen and the waist are separated from each other, and a pair of second parts arranged on both sides of the first part, and the pair of second parts are rotatably connected to the chest.

Advantages of the Invention

[0007] According to the present invention, the postures capable of forming a humanoid body can be appropriately diversified, and this can be realized with a relatively simple configuration.

Brief Description of the Drawings

[0008]

Figure 1

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Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims, and not all combinations of the features described in the embodiments are essential for the invention. Two or more of the plurality of features described in the embodiments may be arbitrarily combined. Also, the same or similar configurations are given the same reference numerals, and duplicate descriptions are omitted.

[0010] (Overall structure of the humanoid body) FIG. 1 is a schematic diagram showing a humanoid body 1 according to an embodiment. The humanoid body 1 includes a head 11, a chest 12, an abdomen 13, a waist 14, legs 15, and arms 16. (The chest 11, abdomen 12, and waist 13 may be collectively referred to as the torso.) Each of the individual parts 11 to 16 is supported so as to be rotatable (or swingable) with respect to an adjacent part. For example, the head 11 is supported so as to be rotatable with respect to the chest 12, the abdomen 13 is supported so as to be rotatable with respect to the waist 14, the legs 15 are supported so as to be rotatable with respect to the waist 14, and the arms 16 are supported so as to be rotatable with respect to the chest 12.

[0011] In this way, a joint structure is provided in each part of the humanoid body 1, and a user (for example, the owner of the humanoid body 1) can set the humanoid body 1 in a desired posture, such as a forward flexion posture, a back flexion posture, a lateral flexion posture, etc.

[0012] In addition, in this specification, when explaining the positional relationship of each part, expressions such as front (front), rear (rear), left (left side), right (right side), up (upper), down (lower), etc. may be used, but these expressions are relative to the humanoid body 1. For example, the front corresponds to the front side of the humanoid body 1, and the rear corresponds to the rear side of the humanoid body 1.

[0013] (Joint structure of the abdomen of the humanoid body) Figure 2 is a perspective view showing the structure of the torso of the humanoid body 1. The abdomen 13 and the waist 14 are detachably connected to each other. The abdomen 13 includes an upper abdomen 131 and a lower abdomen 132. Although details will be described later, the upper abdomen 131 is slidably connected to the lower abdomen 132 in the vertical direction. Further, a cover portion 121 is attached to the chest 12 so as to be openable and closable by rotation, and the closed cover portion 121 covers the central front portion of the abdomen 13.

[0014] Figure 3(A) is a perspective view when the cover portion 121 is in the closed state. Figure 3(B) is a perspective view when the cover portion 121 is in the open state. The cover portion 121 seals the abdominal core part 130 described later in the closed state and exposes the abdominal core part 130 in the open state.

[0015] As shown in Figure 4, the abdomen 13 and the waist 14 are connected to each other via a connecting part 191. Usually, the connecting part 191 can be held on the waist 14 side by a fixing part 1911 provided on the lower surface side.

[0016] The abdomen 13 includes an abdominal core part 130. The abdominal core part 130 extends vertically from the upper abdomen 131 to the lower abdomen 132 at the central part of the abdomen 13, and as shown in Figure 4, it can be inserted and removed from the waist 14 side in a state where the abdomen 13 and the waist 14 are separated from each other.

[0017] Figure 5 is a schematic right side view showing the internal structure of the abdomen 13. The abdomen 13 further includes a chest connecting part 51 and a rotation assisting part 52. A pair of chest connecting parts 51 are arranged on both sides of the abdominal core part 130. The rotation assisting parts 52 are arranged in a pair on both sides of the abdominal core part 130 so as to correspond to these pair of chest connecting parts 51. That is, a pair of left and right chest connecting parts 51 and a pair of left and right rotation assisting parts 52 are arranged on the left side and the right side of the abdominal core part 130.

[0018] As shown in the enlarged schematic view of FIG. 5, the rotation assisting part 52 includes a connecting part 521, a connecting part 522, and a convex part 523. The connecting part 521 is provided at one end of the base part 520 of the rotation assisting part 52 and is rotatably connected to the main body part of the abdomen 13. The connecting part 522 is provided at the other end of the base part 520 and rotatably connects the chest connecting part 51, details of which will be described later. Further, the convex part 523 is provided between the connecting part 521 and the connecting part 522 and restricts the rotation region of the chest connecting part 51, details of which will be described later.

[0019] Also, as shown in the enlarged schematic view of FIG. 5, the chest connecting part 51 includes a connecting part 511, a connecting part 512, and an extending part 513. The connecting part 511 rotatably connects the chest 12. The connecting part 512 is rotatably connected to the main body part of the abdomen 13 and is rotatably connected to the connecting part 522 of the rotation assisting part 52 in this embodiment. The extending part 513 extends from the connecting part 511 to the connecting part 512 so as to connect them.

[0020] With such a structure, regardless of the presence or absence of the abdominal core part 130, the chest 12 can be rotated with respect to the abdomen 13 by the chest connecting part 51, and for example, interference between adjacent parts that may occur when assuming a dorsiflexed posture can be avoided.

[0021] In this embodiment, the connecting part 512 is located in front of and below the connecting part 511, and the extending part 513 is provided to be curved in an L shape. Thereby, the chest connecting part 51 enables the chest 12 to rotate backward with respect to the abdomen 13.

[0022] In addition, the connecting portion 512 includes a restricting portion 5121 that restricts the rotation region with respect to the main body portion of the abdomen 13. In the present embodiment, the restricting portion 5121 is provided in a shape extending from the connecting portion 512 toward the rotation assisting part 52 side. When the chest 12 rotates with respect to the abdomen 13, the restricting portion 5121 engages with the convex portion 523 as the connecting portion 51 of the chest rotates. As a result, the rotation region of the chest connecting part 51 on the main body portion side of the abdomen 13 is restricted. From this perspective, the restricting portion 5121 and the convex portion 523 may be expressed as an extending portion and a locking portion, respectively. According to such a structure, the aesthetic appearance when the space formed between the chest 12 and the abdomen 13 (that is, the internal structure between the chest 12 and the abdomen 13) is viewed from the outside can be improved.

[0023] Figs. 10(A) to 10(C) are right side schematic views showing in more detail the states of the chest connecting part 51 and the rotation assisting part 52 when the chest 12 rotates in the front-rear direction with respect to the abdomen 13. Fig. 10(A) shows the state in the standard posture (or upright posture). Fig. 10(B) shows the state in the dorsiflexed posture (when the chest 12 rotates backward with respect to the abdomen 13). Further, Fig. 10(C) shows the state in the forward flexed posture (when the chest 12 rotates forward with respect to the abdomen 13). For ease of understanding the structure, the cross-sectional structure of the portion of the chest 12 connected to the connecting portion 511 is illustrated by a broken line.

[0024] As can be seen from Fig. 10(B), in the case of the dorsiflexed posture, from the standard posture (see Fig. 10(A)), the connecting portion 522 and the convex portion 523 rotate upward and rearward with the connecting portion 521 as the rotation axis. Along with this, the entire chest connecting part 51 including the connecting portion 511, the connecting portion 512, and the extending portion 513 rotates upward and rearward. In the figure, the modes of these rotations are indicated by arrows. In this way, the chest 12 rotates backward with respect to the abdomen 13.

[0025] As can be seen from FIG. 10(C), in the case of the forward bending posture, the posture of the entire rotation assist part 52 including the connecting part 521, the connecting part 522, and the convex part 523 is substantially maintained from the standard posture (see FIG. 10(A)). On the other hand, for the chest connecting part 51, the connecting part 511 and the extending part 513 rotate upward and forward with the connecting part 512 as the rotation axis, and the entire chest connecting part 51 rotates upward and forward. In the figure, these rotation modes are indicated by arrows. In this way, the chest 12 rotates forward with respect to the abdomen 13.

[0026] As described above, each of the chest connecting part 51 and the rotation assist part 52 is arranged as a pair on both sides of the abdominal core part 130. Here, the chest connecting part 51 and the rotation assist part 52 can be individually deformed on the left side and / or the right side. That is, the left chest connecting part 51 and the rotation assist part 52 can exhibit the mode of FIG. 10(B) and / or the mode of FIG. 10(C). Independently of this, the right chest connecting part 51 and the rotation assist part 52 can exhibit the mode of FIG. 10(B) and / or the mode of FIG. 10(C). Therefore, the chest 12 can extend substantially straight up with respect to the abdomen 13 and take an extended posture, or can take a lateral bending posture rotated to one side with respect to the abdomen 13.

[0027] FIG. 6 is a schematic right side view showing another internal structure of the abdomen 13. As described above, the abdomen 13 includes the upper abdomen 131 and the lower abdomen 132, and the upper abdomen 131 is connected to the lower abdomen 132 so as to be slidable in the vertical direction with respect to each other. The abdomen 13 includes a pair of left and right sliding parts 61 on both sides that make the upper abdomen 131 slidable with respect to the lower abdomen 132.

[0028] As shown in the enlarged schematic view of FIG. 6, the sliding portion 61 is provided such that a convex portion 611 extends vertically in one of the upper abdomen 131 and the lower abdomen 132 (the lower abdomen 132 in this embodiment), and a concave portion 612 extends vertically in the other (the upper abdomen 131 in this embodiment), and they are slidably held with respect to each other. In this embodiment, columnar protrusions 6111 are provided on both side surfaces of the convex portion 611, elongated holes 6121 extending in the vertical direction are provided on both side surfaces of the concave portion 612, and the protrusions 6111 are slidably fitted into the corresponding elongated holes 6121. With such a structure, the sliding region of the upper abdomen 131 with respect to the lower abdomen 132 is restricted.

[0029] Further, in this embodiment, the pair of sliding portions 61 are provided so as to form a predetermined gap between the upper abdomen 131 and the lower abdomen 132. Thereby, the upper abdomen 131 can swing with respect to the lower abdomen 132. For example, in the case of a dorsiflexed posture, the upper abdomen 131 can rotate backward with respect to the lower abdomen 132, and in the case of a lateral flexion posture, for example, the upper abdomen 131 can rotate laterally with respect to the lower abdomen 132.

[0030] FIGS. 11(A) to 11(C) are front schematic views showing in more detail the states of the pair of left and right sliding portions 61 when the upper abdomen 131 rotates in the vertical direction with respect to the lower abdomen 132. FIG. 11(A) shows the state in the standard posture. FIG. 11(B) shows the state in the extended posture (the case where the upper abdomen 131 extends substantially straight up with respect to the lower abdomen 132). FIG. 11(C) shows the state in the lateral flexion posture (the case where the upper abdomen 131 rotates to one side with respect to the lower abdomen 132).

[0031] As can be seen from FIG. 11(B), in the case of the extended posture, from the standard posture (see FIG. 11(A)), the pair of left and right elongated holes 6121 provided in the upper abdomen 131 move upward with respect to the corresponding protrusions 6111 provided in the lower abdomen 132, respectively. In the figure, the modes of these rotations are indicated by arrows. In this way, the upper abdomen 131 moves upward with respect to the lower abdomen 132.

[0032] As can be seen from FIG. 11(C), in the case of the lateral flexion posture, one of the pair of elongated holes 6121 provided in the upper abdomen 131 moves upward with respect to the corresponding protrusion 6111 provided in the lower abdomen 132 from the standard posture (see FIG. 11(A)). In the figure, these rotational modes are indicated by arrows. In this way, the upper abdomen 131 rotates to one side with respect to the lower abdomen 132.

[0033] As described above, the pair of sliding portions 61 are provided so as to form a predetermined gap between the upper abdomen 131 and the lower abdomen 132. For example, as also shown in FIG. 6, the convex portion 611 is provided such that its width is narrower than the width of the concave portion 612. Thus, although FIGS. 11(A) to 11(C) illustrate the modes of presenting the extended posture and the lateral flexion posture, it is also possible to present the forward flexion posture and the dorsal flexion posture.

[0034] According to the above-described joint structure (referred to as joint structure ST1), in the humanoid body 1 including the abdominal core part 130 where interference is likely to occur between adjacent parts and the abdominal core part 130 can be inserted and removed freely, the trunk part can be deformed according to various postures.

[0035] FIG. 7(A) is a front schematic view showing the mode of relative movement between the chest 12, the upper abdomen 131, and the lower abdomen 132 in the humanoid body 1, and FIG. 7(B) is a right side schematic view showing the same mode.

[0036] According to the joint structure ST1, for example: The chest 12 can move relative to the upper abdomen 131 as shown by arrows A11 and / or A12 (see FIG. 7(A)), that is, it can move in the vertical direction or rotate leftward or rightward; The upper abdomen 131 can move relative to the lower abdomen 132 as shown by arrows A21 and / or A22 (see FIG. 7(A)), that is, it can move in the vertical direction or rotate leftward or rightward; The chest 12 can move relative to the upper abdomen 131 as shown by arrows A31 and / or A32 (see FIG. 7(B)), that is, it can move in the vertical direction or rotate forward or backward; also, The upper abdomen 131 is capable of relative movement with respect to the lower abdomen 132 as shown by the arrows A41 and / or A42 (see Fig. 7(B)), that is, it can move in the vertical direction or rotate forward or backward.

[0037] To put it briefly, one aspect of this embodiment relates to the joint structure ST1 of the humanoid body 1, and the abdomen 13 includes an abdominal core part (first part) 130 and a pair of chest connecting parts (second parts) 51. The abdominal core part 130 extends vertically in the central part of the abdomen 13 and is arranged to be insertable and removable from the side of the waist 14 in a state where the abdomen 13 and the waist 14 are separated from each other. The pair of chest connecting parts 51 are arranged on both sides of the abdominal core part 130 and are rotatably connected to the chest 12. According to such a joint structure ST1, the chest 12 can be rotated with respect to the abdomen 13 by the pair of chest connecting parts 51 regardless of the presence or absence of the abdominal core part 130, enabling various postures to be taken, and also avoiding interference between adjacent parts that may occur at that time.

[0038] (Joint structure of the waist of the humanoid body) Figs. 8(A) and 8(B) are schematic right side views showing the internal structure of the waist 14. Here, for ease of understanding, the legs 15 and the connecting part 191 are not shown. The waist 14 includes a rear waist part 141, a front waist part 142, and a central waist part 143.

[0039] The rear waist part 141 forms the rear part of the waist 14 and rotatably connects the legs 15. The rotation axis of the legs 15 with respect to the rear waist part 141 is defined as axis AX1.

[0040] The front waist part 142 forms the front part of the waist 14 and is rotatably connected to the rear waist part 141 in the forward direction. The rotation axis of the front waist part 142 with respect to the rear waist part 141 is defined as axis AX2.

[0041] The central waist part 143 forms the central part of the waist 14 and is connected to the front waist part 142 so as to be rotatable upward. The rotation axis of the central waist part 143 with respect to the front waist part 142 is defined as axis AX3.

[0042] As can be seen from FIGS. 8(A) and 8(B), the rear waist part 141, the front waist part 142, and the central waist part 143 are arranged so as to be partially overlapped and arranged in order from below to above in a side view (when viewed in the left-right direction). According to the state of FIG. 8(B), the front waist part 142 rotates forward with respect to the rear waist part 141, the central waist part 143 rotates upward with respect to the front waist part 142, and the central waist part 143 moves upward with respect to the state of FIG. 8(A). Along with this, the chest 12 and the abdomen 13 move upward.

[0043] The rotation axis AX2 of the front waist part 142 with respect to the rear waist part 141 is located in front of the rotation axis AX1 of the leg 15 with respect to the rear waist part 141. Also, the rotation axis AX3 of the central waist part 143 with respect to the front waist part 142 is located behind the rotation axis AX1. This / These enable the presentation of a deformation without a sense of discomfort and avoid interference between adjacent parts. For example, in the state of FIG. 8(B), for example, the cover part 121 can be opened and closed without interfering with the front waist part 142.

[0044] In the present embodiment, the rear waist part 141 includes a restricting part 1411 that restricts the rotation region of the front waist part 142. The restricting part 1411 is provided in a shape in which the inner wall of the rear waist part 141 is recessed. When the central waist part 143 that rotates together with the front waist part 142 is locked to the restricting part 1411, the front waist part 142 can rotate forward by a predetermined amount with respect to the rear waist part 141.

[0045] FIG. 9 is a top schematic view showing the internal structure of the waist portion 14. Here, for ease of understanding, the connecting part 191 is not shown. Also, to show the details of the internal structure, the left side portion (a part on the right side in the figure) of the central waist part 143 is not shown. An opening OP1 is provided in the central waist part 143, and the fixing part 1911 (see FIG. 4) of the connecting part 191 fits into this opening OP1. The waist portion 14 further includes a waist peripheral part 144 and a waist peripheral connecting part 145.

[0046] The waist peripheral part 144 forms a part corresponding to the kusazuri, wakidate, tateate, or hiza-yoroi, and is provided so as to cover the leg part 15 from the outside with respect to the central waist part 143. In the present embodiment, the waist peripheral part 144 is provided individually for each of the front, rear, and outer sides of the leg part 15.

[0047] The waist peripheral connecting part 145 connects the waist peripheral part 144 to the central waist part 143 so as to be swingable. The waist peripheral connecting part 145 includes a front extending part 1451, a rear extending part 1452, and a side extending part 1453.

[0048] The front extending part (first extending part) 1451 extends from the side front part of the central waist part 143 to the outer side, and is rotatably connected to this side front part. The rotation axis of the front extending part 1451 with respect to the central waist part 143 is defined as axis AX21.

[0049] The rear extending part (second extending part) 1452 extends from the side rear part of the central waist part 143 to the outer side, and is rotatably connected to this side rear part. The rotation axis of the rear extending part 1452 with respect to the central waist part 143 is defined as axis AX22.

[0050] The side extension part (third extension part) 1453 connects the front extension part 1451 and the rear extension part 1452 and is pivotally connected to them. The rotation axis of the side extension part 1453 with respect to the front extension part 1451 is defined as axis AX23, and the rotation axis of the side extension part 1453 with respect to the rear extension part 1452 is defined as axis AX24.

[0051] According to such a structure, the side extension part 1453 can move in the front - rear direction when the front extension part 1451 and the rear extension part 1452 rotate with respect to the waist central part 143. Along with this, the waist peripheral part 144, which is swingably connected to the waist central part 143 by the waist peripheral part connecting part 145, can also move in the front - rear direction. Therefore, according to such a structure, the waist peripheral part 144 can take various postures regardless of the posture of the leg 15.

[0052] In this embodiment, the waist peripheral part 144 provided in front of the leg 15 is swingably connected to the front extension part 1451. Also, the waist peripheral part 144 provided behind the leg 15 is swingably connected to the rear extension part 1452, and the waist peripheral part 144 provided on the outer side of the leg 15 is swingably connected to the side extension part 1453. Thereby, each waist peripheral part 144 can take various postures regardless of the posture of the leg 15.

[0053] In this embodiment, fixing portions 146 for fixing the waist peripheral portion parts 144 are provided on the forward extending part 1451, the rearward extending part 1452, and the sideward extending part 1453, respectively. The fixing portion 146 is swingably connected on the side of the waist peripheral portion connecting part 145 (the side of the forward extending part 1451, the rearward extending part 1452, or the sideward extending part 1453). With such a structure, the individual waist peripheral portion parts 144 fixed to the fixing portion 146 can swing with respect to the waist peripheral portion connecting part 145. Note that the fixing portion 146 can also be expressed as a gripping portion, a holding portion, etc. for gripping or holding the waist peripheral portion parts 144.

[0054] Figures 12(A) to 12(C) are top schematic views showing the deformation modes of the waist peripheral portion connecting part 145 in more detail. Figure 12(A) shows the mode in the standard posture. Figure 12(B) shows the mode when the sideward extending part 1453 moves forward. Also, Figure 12(B) shows the mode when the sideward extending part 1453 moves backward.

[0055] As can be seen from Figure 12(B), when the sideward extending part 1453 moves forward, from the standard posture (see Figure 12(A)), the forward extending part 1451 rotates forward with the axis AX21 as the rotation axis, and the rearward extending part 1452 rotates forward with the axis AX22 as the rotation axis. In the figure, these rotation modes are indicated by arrows. In this way, the forward extending part 1451, the rearward extending part 1452, and the sideward extending part 1453 each move relatively forward with respect to the waist central portion part 143.

[0056] As can be seen from FIG. 12(C), when the side extended part 1453 moves rearward, from the standard posture (see FIG. 12(A)), the front extended part 1451 rotates rearward about the axis AX21 as the rotation axis, and the rear extended part 1452 rotates rearward about the axis AX22 as the rotation axis. In the figure, the modes of these rotations are indicated by arrows. In this way, the front extended part 1451, the rear extended part 1452, and the side extended part 1453 each move relatively rearward with respect to the central part of the waist part 143.

[0057] According to the above-described joint structure (referred to as joint structure ST2), in the humanoid body 1 where interference between adjacent parts is likely to occur, the torso can be deformed according to various postures.

[0058] To put it briefly, another aspect of the present embodiment relates to the joint structure ST2 of the humanoid body 1. The waist 14 includes a rear waist part (first part) 141, a front waist part (second part) 142, and a central waist part (third part) 143. The rear waist part 141 forms the rear part of the waist 14 and rotatably connects the legs 15. The front waist part 142 forms the front part of the waist 14 and is rotatably connected forward with respect to the rear waist part 141. The central waist part 143 forms the central part of the waist 14 and is rotatably connected upward with respect to the front waist part 142. According to such a joint structure ST2, the front waist part 142 and the central waist part 143 can rotate with respect to the rear waist part 141 regardless of the position of the legs 15, enabling various postures to be taken, and also enabling the avoidance of interference between adjacent parts that may occur at that time.

[0059] (Summary) According to the above embodiments, the humanoid body 1 is configured by directly / indirectly connecting individual part parts to each other, and at least two of these multiple parts are relatively rotatably connected to each other. In such a configuration, by making the parts that realize the connection have the structures exemplified in the embodiments, the humanoid body 1 can take various postures and can avoid interference between adjacent parts that may occur at that time.

[0060] The concept of each part described in the above embodiments shall include not only the smallest unit that can be disassembled by the user, but also those formed by combining two or more of them. Therefore, each part can be constituted by directly / indirectly connecting two or more parts (constituent parts) to each other. The concept of connection between parts can include various connection modes such as attaching one part to another part, connecting them, fixing them, etc. Therefore, the present invention is not strictly limited to its expression (the expression can be replaced with a similar expression). In the same spirit, the expression "part" may be replaced with "component, piece", "member", "structure", "assembly", etc., or may be omitted.

[0061] The invention is not limited to the above embodiments, and various modifications and changes are possible within the scope of the gist of the invention.

Explanation of Reference Numerals

[0062] 1: Humanoid body, 12: Chest, 13: Abdomen, 14: Waist, 15: Legs, 130: First part (abdominal core part), 51: Second part (chest connection part).

Claims

1. A joint structure for a doll body having a chest, an abdomen and a waist, the abdominal section and the lumbar section are separably connected to each other; The abdomen is a first part extending in a vertical direction in the center, the first part being arranged so as to be freely inserted and removed from the waist part side when the abdominal part and the waist part are separated from each other; A pair of second parts disposed on both sides of the first part and rotatably connected to the chest part; Includes Joint structure.

2. Each of the pair of second parts is A first connecting portion that rotatably connects the chest portion; A second connecting portion rotatably connected to the abdominal body portion; An extension portion extending to connect the first connecting portion and the second connecting portion; Includes The joint structure according to claim 1.

3. The second connecting portion includes a restricting portion that restricts a rotation area of ​​the abdomen with respect to the main body portion. The joint structure according to claim 2.

4. The second connecting portion is located forward and below the first connecting portion, The extension portion is curved in an L-shape. The joint structure according to claim 2 or 3.

5. The abdomen includes an upper abdomen and a lower abdomen, The upper abdomen is connected to the lower abdomen so as to be slidable in the up-down direction. The joint structure according to any one of claims 1 to 4.

6. The abdomen includes a pair of sliding parts on both sides that allow the upper abdomen to slide relative to the lower abdomen. The joint structure according to claim 5.

7. The upper abdomen is connected to the lower abdomen so as to be capable of swinging relative to each other. The joint structure according to claim 6.

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