JP6061212B1 - Movable joint structure and figure having the movable joint structure - Google Patents

Abstract

An object of the present invention is to provide a movable joint structure including a female joint part having a shape that does not cause an undercut in a portion where a hollow part into which a male joint part of a female joint part is fitted is formed in a mold. A male joint part located on one side with respect to a joint and a female joint part located on the other side are provided. A male joint part is provided in the male joint part, and the male joint part is fitted into the female joint part. A female joint portion is provided, and a hollow portion having two openings directed in different directions is formed in the female joint portion, and the inner wall of the hollow portion is located on the outer side of the hollow portion from one opening side to the one opening side. The first inner wall portion having an inner surface extending without going inward to the other opening end and the other opening side and extending without going inward to the one opening end located outside the hollow portion from the other opening side It has a configuration having a second inner wall portion having an inner surface, and the inner surface located on one opening side of the first inner wall portion and the inner surface located on the other opening side of the second inner wall portion can slide with the outer surface of the male joint portion. Make contact. [Selection] Figure 2

Description

  The present invention relates to a movable joint structure and a figure provided with the movable joint structure.

  As is well known, a movable joint structure using a ball joint is adopted in many figures because the joint can be moved at a relatively free angle.

  For example, as a figure having a movable joint structure using a ball joint, in Patent Document 1 described later, the abdominal skeleton part can rotate the first and second ball parts provided at both ends, respectively. A lumbar skeleton connecting portion and a thoracic skeleton connecting portion, which are substantially U-shaped in cross-sectional view, are fitted into the skeleton, and a first insertion rod and a second insertion rod are provided at respective ends of the lumbar skeleton connection portion and the chest skeleton connection portion. Are respectively installed integrally, and each of the fitting parts for fitting the first ball part and the second ball part, when the first ball part and the second ball part are fitted, has a waist skeleton connecting part and a chest part. The curvature of each curved surface of the fitting portion is the same as or approximate to the curvature of each of the first ball portion and the second ball portion so that the skeleton connecting portion can maintain its state at a desired position. A movable joint structure is disclosed in which the two ball portions are configured to be in close sliding contact with each other.

  Further, Patent Document 2 described later includes a first member and a second member. The first member includes a shaft member and spherical joints provided at both ends of the shaft member. The member is formed in a cylindrical shape, a holding portion that rotatably holds the spherical joint of the first member is formed on one end opening side and the other end opening side, and a movable member having a flange provided on the outer peripheral surface A joint structure is disclosed.

JP2004-222935 JP 2002-227829 A

  However, in the movable joint structure using the ball joint disclosed in Patent Document 1 or 2, since it is necessary to fit the ball part (spherical joint) into the fitting part (holding part) or more than a hemisphere, When a joint part is composed of a single part, an undercut always occurs in the part where the fitting part (holding part) of the mold for molding the part is molded. Therefore, there is a problem that the structure of the mold becomes complicated and the production cost becomes high.

  For this reason, conventionally, in order to solve the above-mentioned problem, the female joint part is composed of two parts, and a part for molding the fitting part (holding part) of the mold for molding each part is formed. In this case, the number of parts that make up the female joint part is increased to two, which makes the joint structure complicated and requires time for assembly. It was.

  Therefore, the present inventor, in a mold for molding a female joint part, a movable joint structure provided with a female joint part having a shape in which an undercut does not occur in a portion for molding a hollow part into which the male joint part of the female joint part is fitted. And a male joint that is positioned on one side with respect to the joint of the figure as a result of trial and error trials and errors in order to achieve its realization as a technical subject to obtain a figure with the movable joint structure It has a part and a female joint part positioned on the other side, the male joint part is provided with a male joint part, and the female joint part is provided with a female joint part into which the male joint part is slidably fitted In the movable joint structure that connects both parts by fitting the male joint part into the female joint part, the female joint part is formed with a hollow part having two openings in different directions. A first inner wall portion having an inner surface extending from one opening side to the other opening end positioned on the outer side of the hollow portion from the one opening side without going inward, and the other inner side from the other opening side. The second inner wall portion having an inner surface that extends without going inward to one opening end positioned on the outer side of the hollow portion with respect to the opening side, and the inner surface and the second inner surface positioned on one opening side of the first inner wall portion If the inner surface located on the other opening side of the inner wall portion is slidably contacted with the outer surface of the male joint portion fitted in the hollow portion of the female joint portion, the technical problem should be solved. We have obtained knowledge.

  The technical problem can be solved by the present invention as follows.

  That is, the movable joint structure according to the present invention has a male joint part positioned on one side with respect to the joint of the figure and a female joint part positioned on the other side, and the male joint part is provided with a male joint part. In the movable joint structure in which the female joint part is provided with a female joint part in which the male joint part is slidably fitted, and the male joint part is fitted into the female joint part to connect both parts. Is formed with a hollow portion having two openings in different directions, and the inner wall of the hollow portion extends from one opening side to the other opening end positioned outside the hollow portion from the one opening side. A first inner wall portion having an inner surface extending without going inward and an inner surface extending without going inward from the other opening side to one opening end positioned outside the hollow portion with respect to the other opening side A male having a second inner wall portion, and an inner surface located on one opening side of the first inner wall portion and an inner surface located on the other opening side of the second inner wall portion are fitted in the hollow portion of the female joint portion. The outer surface of the joint is slidably contacted. (First invention)

  Further, according to the present invention, in the movable joint structure according to the first aspect, the inner surface located on one opening side of the first inner wall portion and the inner surface located on the other opening side of the second inner wall portion are formed in the hollow portion of the female joint portion. It is in surface contact with the outer surface of the inserted male joint so as to be slidable. (Second invention)

  Further, according to the present invention, in the movable joint structure of the first invention or the second invention, the inner wall of the hollow part is formed by alternately arranging the first inner wall part and the second inner wall part. (Third invention)

  In the movable joint structure according to the first to third aspects of the present invention, either one or both of the joint portions have elasticity. (Fourth invention)

  Furthermore, this invention is a figure provided with the movable joint structure of 1st invention-4th invention.

  In addition, the figure in this invention should just have a joint, For example, the thing imitating a human, a robot, an animal, an insect, a fictional creature, etc., and the skeleton built in the outer skin imitating these are also contained.

  According to the present invention, in a pair of separable molds for forming a female joint part, the second inner wall portion of the hollow portion is formed by one mold that is formed by removing the hollow portion of the female joint portion from one opening. Then, by forming the first inner wall portion of the hollow portion with the other mold that is formed by removing the hollow portion of the female joint portion from the other opening, an undercut occurs in the portion that molds the hollow portion of both molds. Absent.

  Therefore, it can be said that the industrial applicability of the present invention is very high.

1 is a partially transparent front view showing a doll according to Embodiment 1. FIG. It is the perspective view which showed the state which decomposed | disassembled the movable joint structure used for the skeleton member shown in FIG. It is the front view and back view which showed the state which assembled the movable joint structure shown in FIG. It is the perspective view which showed the state which expand | deployed the inner wall of the female joint part shown in FIG. It is sectional drawing which showed the positional relationship of the AA part and BB part of an inner wall, and a male joint part in the state by which the male joint part was inserted in the female joint part which has an inner wall shown in FIG. 6 is a perspective view showing a state where a movable joint structure according to Embodiment 2 is disassembled. FIG. FIG. 6 is a perspective view showing a state where a movable joint structure according to Embodiment 3 is disassembled. FIG. 10 is a perspective view showing a state in which an inner wall of a female joint part of Modification 1 according to Embodiment 4 is developed. It is sectional drawing which showed the positional relationship of the AA part of a inner wall, the BB part, and CC part, and a male joint part in the state by which the male joint part was inserted in the female joint part which has an inner wall shown in FIG. is there. FIG. 10 is a perspective view showing a state in which an inner wall of a female joint part of Modification 2 according to Embodiment 4 is developed. It is sectional drawing which showed the positional relationship of the AA part and BB part of an inner wall, and a male joint part in the state by which the male joint part was inserted by the female joint part which has an inner wall shown in FIG. It is the end elevation which cut the female joint part of modification 3 concerning Embodiment 5 so that it may pass through the 1st inner wall part and the 2nd inner wall part. It is the end elevation which cut the female joint part of modification 4 concerning Embodiment 5 so that it may pass through the 1st inner wall part and the 2nd inner wall part. FIG. 10 is a perspective view showing a male joint part of Modification 5 according to Embodiment 6. It is the end elevation which cut so that the movable joint structure of modification 5 concerning Embodiment 6 may pass through the 1st inner wall part and the 2nd inner wall part of a female joint part. FIG. 10 is a perspective view showing a male joint part of Modification 6 according to Embodiment 6. It is the end elevation which cut so that the movable joint structure of modification 6 concerning Embodiment 6 may pass through the 1st inner wall part and the 2nd inner wall part of a female joint part. FIG. 29 is a perspective view showing a male joint part of Modification 7 according to Embodiment 6. It is the end elevation which cut so that the movable joint structure of modification 7 concerning Embodiment 6 may pass through the 1st inner wall part and the 2nd inner wall part of a female joint part.

  Embodiments of the present invention will be described below.

  Embodiment 1 FIG.

  As shown in FIG. 1, the figure according to the present embodiment is a doll 1, which includes a head part 2, a torso part 5 including an upper torso part 3 and a lower torso part 4, an upper arm part 6, and the like. The arm part 9 includes a forearm part 7 and a hand part 8, and the leg part 13 includes a thigh part 10, a shin part 11, and a foot part 12. Each of the parts has a structure in which a skeleton member 15 is built in a hollow exterior member 14. And the movable joint structure 16 which concerns on this Embodiment is used for the some joint which the skeleton member 15 incorporated in the trunk | drum 5 has.

  As shown in FIG. 2, the movable joint structure 16 has a male joint part 17 positioned on one side with respect to the joint and a female joint part 18 positioned on the other side with respect to the joint. The male joint part 17 has a structure in which a spherical male joint part 20 is provided at the tip of the male main body part 19, and the female joint part 18 has the male joint part 20 at the tip of the female main body part 21. It has a structure in which a female joint portion 23 to be slidably fitted is provided, and both joint parts 17 and 18 are connected by fitting the male joint portion 20 into the female joint portion 23. 2 to 4, the male main body portion 19 and the female main body portion 22 are shown in a simplified shape in a columnar shape, but the shape of the male main body portion 19 is a form of a portion located on one side with respect to the joint. The shape of the female main body 22 may be appropriately changed according to the form of the part located on the other side with respect to the joint.

  As shown in FIG. 3, the female joint part 23 of the female joint part 18 is composed of support pieces 24 and 24 that extend in a bifurcated manner so as to draw an arc from the tip of the female main body 21. Both support pieces 24, 24 are each formed in an arc shape that surrounds a quarter or more of a circle, and as a result, when viewed as a whole, the female joint portion 23 has an arc shape that surrounds a half or more of the circle. Is formed. As shown in FIG. 2, a hollow portion 22 into which the male joint portion 20 can be fitted is formed between the support pieces 24, 24. The hollow portion 22 is in a direction opposite to each other. It has two openings 25 and 26 that face.

  As shown in FIG. 4, the inner wall of the hollow portion 22 of the female joint portion 23 is hollow from one opening 25 side to the other opening end 26 a positioned outside the hollow portion 22 rather than the one opening 25 side. The first inner wall 27 having an inner surface extending without going to the inside of the portion 22, and the one opening end 25 a positioned on the outer side of the hollow portion 22 from the other opening 26 side to the other opening 26 side. It is comprised from the 2nd inner wall part 28 extended without going inside the hollow part 22, and both the inner wall parts 27 and 28 are arranged side by side alternately. Therefore, the inner surface of the first inner wall portion 27 does not have a portion facing the one opening 25, and the inner surface of the second inner wall portion 28 does not have a portion facing the other opening 26. The inner wall portion 25z (the inner wall portion 25z located on the one opening 25 side from the first inner wall portion 27) extending from the position on the one opening 25 side of the first inner wall portion 27 to the one opening end 25b is It is formed on the inner surface extending from the position on the most opening side to the inner side of the hollow part 22 until reaching one opening end 25b located on the outer side of the hollow part 22 from the position. Therefore, the inner surface of the inner wall portion 25z does not have a portion facing the other opening 26. Further, the inner wall portion 26z (the inner wall portion 26z located on the other opening 26 side of the second inner wall portion 28) extending from the position of the second inner wall portion 27 on the other opening 26 side to the other opening end 26b is It is formed on the inner surface that extends from the position on the side of the other opening 26 to the other opening end 26b that is located on the outer side of the hollow portion 22 from the position without going to the inner side of the hollow portion 22. Therefore, the inner surface of the inner wall portion 26z does not have a portion facing the one opening 25. Thus, in this invention, when the 1st inner wall part has not reached one opening end, the inner wall part located in one opening side rather than the said 1st inner wall part reaches one opening end. It is formed on the inner surface that extends without going to the inside of the hollow portion, and when the second inner wall portion does not reach the other opening end, it is located on the other opening side with respect to the second inner wall portion. The inner wall portion is formed on an inner surface that extends without going to the inside of the hollow portion until reaching the other opening end.

  Further, the inner surface of the first inner wall portion 27 has a contact portion 27 a located on the side of one opening 25 from an intermediate position between the openings 25 and 26 (indicated by a one-dot chain line in FIG. 4) of the female joint portion 20. The non-contact portion 27b is formed in a shape that comes into contact with the outer surface of the spherical male joint portion 20 fitted in the hollow portion 22, and a non-contact portion 27b located on the other opening 26 side from an intermediate position between both the openings 25 and 26. It is formed in a shape that does not contact the outer surface of the male joint 20 fitted in the hollow portion 22 of the joint 23. Specifically, the contact portion 27 a is formed in a spherical concave shape so as to be in close contact with the outer surface of the male joint portion 20 fitted in the hollow portion 22 of the female joint portion 23, and thereby, from one opening 25 side. It inclines toward the outer side of the hollow part 22 steplessly toward the intermediate position of both the openings 25 and 26, and extends without going toward the inner side of the hollow part 22. Further, the non-contact portion 27 b is not inclined from the intermediate position between the openings 25 and 26 toward the other opening end 26 a and extends without going toward the inside of the hollow portion 22. Therefore, when the entire inner surface of the first inner wall portion 27 is viewed, it goes from the one opening 25 side to the inside of the hollow portion 22 from the one opening 25 side to the other opening end 26a positioned on the outer side of the hollow portion 22. It is in an extended state.

  In addition, the inner surface of the second inner wall portion 28 has a contact portion 28a located on the other opening 26 side from an intermediate position between the openings 25 and 26 (indicated by a dotted line in FIG. 4), and the hollow portion of the female joint portion 23. The non-contact part 28b formed in the shape which contacts the outer surface of the spherical-shaped male joint part 20 inserted by the part 22 and located in the one opening 25 side from the intermediate position of both the openings 25 and 26 is a female joint. It is formed in a shape that does not contact the outer surface of the male joint 20 fitted in the hollow portion 22 of the portion 23. Specifically, the contact portion 28 a is formed in a spherical concave shape so as to be in close contact with the outer surface of the male joint portion 20 fitted in the hollow portion 22 of the female joint portion 23, and thereby, from the other opening 26 side. It inclines toward the outer side of the hollow part 22 steplessly toward the intermediate position of both the openings 25 and 26, and extends without going toward the inner side of the hollow part 22. Further, the non-contact portion 28 b is not inclined from the intermediate position between the openings 25 and 26 toward the one opening end 25 a and extends without going toward the inside of the hollow portion 22. Therefore, when the entire inner surface of the second inner wall portion 28 is viewed, it goes from the other opening 26 side to the inside of the hollow portion 22 to one opening end 25a positioned outside the hollow portion 22 rather than the other opening 26 side. It is in an extended state.

  The female joint part 18 is formed of a material having elasticity. With this, when the male joint part 20 of the male joint part 17 is pushed into the hollow part 22 of the female joint part 23 in the female joint part 18, The hollow part 22 of the female joint part 23 can be slightly expanded against the elasticity to fit the male joint part 20, thereby obtaining the movable joint structure 16 that can move relatively freely like the ball joint. Can do.

  And according to this Embodiment, when shape | molding the female joint part 23 with a pair of metal mold | die, the 1st inner wall part 27 of the hollow part 22 is shape | molded by one metal mold | die, respectively, and it hollows by the other metal mold | die. By molding the second inner wall portion 28 of the portion 22, an undercut does not occur in the portion where the hollow portion 22 of the female joint portion 23 of both molds is molded.

  Embodiment 2. FIG.

  The present embodiment is a modification of the movable joint structure according to the first embodiment. In FIG. 6, the same reference numerals as those in FIGS. 1 to 5 indicate the same or corresponding parts.

  As shown in FIG. 6, the male joint part 17 according to the present embodiment has the same structure as that of the first embodiment. In addition, the female joint part 18 according to the present embodiment is formed by a substantially cylindrical female joint portion 30 that extends and is connected so as to draw an arc from the tips of a pair of female main body portions 29 and 29 divided into two. It has a structured. The pair of female main body portions 29 and 29 are formed with screw holes 31 and 31 that communicate with each other, and the screw holes 31 and 31 are tightened parts including bolts 32 and nuts 33. It has been stopped.

  Note that the female joint portion 30 has a hollow portion 22 into which the male joint portion 20 is fitted, and the hollow portion 22 has two openings 25 and 26 directed in directions opposite to each other. The first inner wall portion 27 and the second inner wall portion 28 are alternately arranged on the inner wall of the female joint portion 30 as in the first embodiment.

  The female joint part 18 is formed of an elastic material, so that when the male joint part 20 is pushed into the hollow part 22 of the female joint part 30, the hollow part 22 of the female joint part 30 becomes elastic. Accordingly, the male joint portion 20 can be fitted with a slight spread, and thus the movable joint structure 16 that can move relatively freely like the ball joint can be obtained. Further, when the nut 33 screwed to the bolt 32 is tightened, the gap between the pair of female main body portions 29 and 29 is narrowed, and thereby the female joint portion 30 is tightened to the male joint portion 20 fitted in the hollow portion 22. The frictional force generated between the joints 20 and 30 can be improved, and the frictional force can be adjusted by adjusting the tightening degree of the nut 33 with respect to the bolt 32.

  Also in the present embodiment, when the female joint portion 30 is formed with a pair of molds, an undercut does not occur in the portion where the hollow portion 22 of the female joint portion 30 of both molds is formed.

  Embodiment 3 FIG.

  The present embodiment is a modification of the movable joint structure according to the first embodiment. In FIG. 7, the same reference numerals as those in FIGS. 1 to 5 denote the same or corresponding parts.

  As shown in FIG. 7, the male joint part 17 according to the present embodiment has a structure in which a spherical male joint part 35 is provided at the tip of the male main body part 34, and the male main body part 34 is divided into two parts. In addition, a split groove 36 extending so as to divide the hemisphere or more of the male joint portion 35 into two is formed. Further, the female joint part 18 according to the present embodiment has a structure in which a cylindrical female joint portion 37 is provided at the tip of the female main body portion 21.

  The female joint portion 37 has a hollow portion 22 into which the male joint portion 35 is fitted, and the hollow portion 22 has two openings 25 and 26 in directions opposite to each other. The first inner wall portion 27 and the second inner wall portion 28 are alternately arranged on the inner wall of the female joint portion 37 as in the first embodiment.

  The male joint part 17 is formed of an elastic material, so that when the male joint part 35 is pushed into the hollow part 22 of the female joint part 37, the male joint part 35 resists elasticity slightly. Therefore, the movable joint structure 16 that can be relatively freely moved like the ball joint can be obtained.

  Also in the present embodiment, when the female joint portion 37 is formed with a pair of molds, an undercut does not occur in the portion where the hollow portion 22 of the female joint portion 35 of both molds is formed.

  Embodiment 4 FIG.

  The present embodiment is a modification of the inner wall of the hollow portion of the female joint according to the first embodiment. In FIGS. 8 to 11, the same reference numerals as those in FIGS. 1 to 5 denote the same or corresponding parts. Yes.

  Modification 1: As shown in FIGS. 8 and 9, the inner wall of the female joint portion 23 according to this modification includes the first inner wall portion 27 and the second inner wall portion 28 having the same shape as that of the first embodiment. It is comprised from the 3rd inner wall part 38 extended without inclining between the opening ends 25a and 26a toward the inner side and the outer side of the hollow part 22, and the three inner wall parts 27, 28, and 38 are repeatedly arranged in order. Has been placed. As a result, as shown in FIG. 9B, the inner surface of the third inner wall portion 34 is formed in a shape that does not come into surface contact with the outer surface of the male joint portion 20 fitted in the hollow portion 22 of the female joint portion 23. Yes.

  Modification 2: The inner wall of the female joint portion 23 according to this modification is positioned between the openings 25 and 26 from the side of one opening 25 (as indicated by the one-dot chain line in FIG. 10), as shown in FIGS. A first inner wall portion 39 having an inner surface that continues to extend inwardly to the other opening end 26a positioned on the outer side of the hollow portion 22 with respect to the one opening 25 side by forming a step 39c in front of Further, a step 40c is formed from the other opening 26 side before the intermediate position between the two openings 25, 26, and is directed inward from the other opening 26 side to one opening end 25a positioned outside the hollow portion 22. It is comprised from the 2nd inner wall part 40 which has the inner surface which continues without extending, and the two inner wall parts 39 and 40 are arrange | positioned side by side alternately.

  Then, the inner surface of the first inner wall portion 39 has a male contact portion 39a in which a contact portion 39a extending from one opening 25 side to a step 39c is fitted into the hollow portion 22 of the female joint portion 20, as shown in FIG. The outer surface of the male joint portion 20 is formed in a shape in surface contact with the outer surface of the joint portion 20, and the non-contact portion 39 b extending from the other opening 26 side to the step 39 c is fitted into the hollow portion 22 of the female joint portion 23. It is formed in a shape that does not contact the surface. Further, as shown in FIG. 11B, the inner surface of the second inner wall portion 40 is a male portion in which a contact portion 40 a extending from one opening 25 side to a step 40 c is fitted in the hollow portion 22 of the female joint portion 20. The outer surface of the male joint portion 20 is formed in a shape in surface contact with the outer surface of the joint portion 20, and the non-contact portion 40 b extending from the other opening 26 side to the step 40 c is fitted in the hollow portion 22 of the female joint portion 23 It is formed in a shape that does not contact the surface.

  Embodiment 5 FIG.

  The present embodiment is a modification of the female joint according to the third embodiment. In FIGS. 12 and 13, the same reference numerals as those in FIG. 7 indicate the same or corresponding parts. In addition, the 2nd inner wall part adjacent to a 1st inner wall part is shown by (a) of FIG. 12 and (a) of FIG. 13, and (b) of FIG. 12 and (b) of FIG. The first inner wall portion adjacent to the second inner wall portion is shown, and in each figure, the opening is indicated by a dotted line.

  Modification 3: As shown in FIG. 12, the female joint portion 41 according to this modification includes two openings 25 and 26 having different inner diameters in which the hollow portions 22 into which the male joint portions 35 are fitted are directed in directions opposite to each other. Have. Then, as shown in FIG. 12A, the inner wall of the hollow portion 22 has the other large-diameter opening positioned from the one small opening end 25 b to the outside of the hollow portion 22 than the one opening end 25 b. A first inner wall portion 42 having an inner surface that extends without going toward the inside of the hollow portion 22 until reaching the end 26a, and is positioned on the outer side of the hollow portion 22 from the other large opening end 26b to the other opening end 26b. It is comprised from the 2nd inner wall part 43 extended without going to the inner side of the hollow part 22 until it reaches one open end 25a to be formed, and both the inner wall parts 42 and 43 are arranged side by side alternately. Therefore, the inner surface of the first inner wall portion 42 does not have a portion facing the one opening 25, and the inner surface of the second inner wall portion 43 does not have a portion facing the other opening 26. Incidentally, the first inner wall portion 42 is provided with a portion that does not incline toward the inside and outside of the hollow portion 22 with respect to the axis line extending in the opening direction of both the openings 25 and 26 on one opening 25 side and the other opening 26 side, In addition, there is a steplessly inclined portion from one opening 25 side toward the other opening 26 side located outside the hollow portion 22 from the one opening 25 side. As described above, the first inner wall portion extends to one open end 25b and the second inner wall portion extends to the other open end 26b.

  Also in this modified example, when the female joint portion 41 is formed with a pair of molds, an undercut does not occur in the portion where the hollow portion 22 of the female joint portion 41 of both molds is formed.

  Variation 4: The female joint portion 44 according to this variation has two openings 25 and 26 in which the hollow portion 22 into which the male joint portion 35 is fitted is directed in different directions, as shown in FIG. Then, as shown in FIG. 13A, the inner wall of the hollow portion 22 has a hollow portion on the basis of an axis extending from the one opening 25 side to the opening direction of the other opening 26 rather than the one opening 25 side. A first inner wall portion 45 having an inner surface that extends without going to the inside of the hollow portion 22 until reaching the other opening end 26a positioned on the outer side of the 22 and one from the other opening 26 side than the other opening 26 side The second inner wall 46 extends without going to the inside of the hollow portion 22 until reaching one opening end 25a positioned on the outer side of the hollow portion 22 with respect to an axis extending in the opening direction of the opening 25 of Both inner wall portions 45 and 46 are alternately arranged. Therefore, the inner surface of the first inner wall portion 45 does not have a portion facing the one opening 25, and the inner surface of the second inner wall portion 46 does not have a portion facing the other opening 26. As shown in FIG. 13A, the inner wall portion 25z extending from the position of the first inner wall 45 to the one opening end 25b from the position of the first opening 25 is from the position of the first opening 25. It is formed on an inner surface that extends without going toward the inside of the hollow portion 22 with respect to an axis extending in the opening direction of the one opening 25 until reaching one opening end 25b. Therefore, the inner surface of the inner wall portion 25z does not have a portion facing the other opening 26. Further, as shown in FIG. 13B, the inner wall portion 26z extending from the position of the second inner wall portion 46 on the other opening 26 side to the other opening end 26b is from the position on the other opening 26 side. It is formed on the inner surface that extends without going to the inside of the hollow portion 22 with respect to the axis extending in the opening direction of the other opening 26 until reaching the other opening end 26b. Therefore, the inner surface of the inner wall portion 26z does not have a portion facing the one opening 25.

  Also in this modification, when the female joint portion 44 is formed with a pair of molds, the first inner wall portion 45 and the inner wall portion 26z of the hollow portion 22 are formed with one mold, and the hollow portion is formed with the other mold. By molding the second inner wall portion 46 and the inner wall portion 25b of 22, no undercut occurs in the portion where the hollow portion 22 of the female joint portion 23 of both molds is molded. An undercut does not occur in the portion where the hollow portion 22 of the female joint portion 44 of both molds is molded.

  Embodiment 6 FIG.

  The present embodiment is a modification of the movable joint structure according to the third embodiment. In FIGS. 14 to 19, the same reference numerals as those in FIGS. 1 to 5 indicate the same or corresponding parts.

  Modification 5: As shown in FIG. 14, the male joint part 47 according to this modification has a structure in which a flat oval spherical male joint 35 is provided at the tip of the male main body 34. 34 is divided into two, and a split groove 36 extending so as to divide a part of the male joint portion 35 into two is formed. Further, the female joint part 48 according to the present embodiment has a structure in which a female joint part 37 in which an elliptical sphere is formed in a hollow shape is provided at the tip of a female main body part (not shown).

  The female joint portion 37 has a hollow portion 22 into which the male joint portion 35 is fitted, and the hollow portion 22 has two openings 25 and 26 in directions opposite to each other. Then, on the inner wall of the female joint portion 37, as shown in FIG. 15 (a), from one opening end 25b to the other opening end 26a positioned outside the hollow portion 22 from the one opening end 25b. A first inner wall portion 27 having an inner surface that extends without going to the inside of the hollow portion 22 until it reaches, and a hollow portion from the other opening end 26b to the other opening end 26b as shown in FIG. It is comprised from the 2nd inner wall part 28 extended without going to the inner side of the hollow part 22 until it reaches one opening end 25a located on the outer side of 22, The both inner wall parts 27 and 28 are arrange | positioned alternately. . Therefore, the inner surface of the first inner wall portion 27 does not have a portion facing the one opening 25, and the inner surface of the second inner wall portion 28 does not have a portion facing the other opening 26.

  The male joint part 47 is formed of a material having elasticity. With this, when the male joint part 35 is pushed into the hollow part 22 of the female joint part 37, the male joint part 35 is slightly resisted by elasticity. The male joint portion 35 can be fitted into the male joint portion 20 by being contracted to the split groove 36 side, whereby the axis line connecting the two flat surfaces of the male joint portion 35 with respect to the female joint portion 37 is used as a rotation axis. A movable joint structure 16 that can move so as to rotate can be obtained.

  Also in the present embodiment, when the female joint portion 37 is formed with a pair of molds, an undercut does not occur in the portion where the hollow portion 22 of the female joint portion 35 of both molds is formed.

  In the modified example 6 and the modified example 7, the shape of the male joint part 35 of the male joint part 47 in the modified example 5 is deformed, and the shape of the hollow part 22 of the female joint part 37 is matched to the shape of the male joint part 35. It is a deformed one. Specifically, the shape of the male joint portion 35 according to the modified example 6 is an elliptical sphere, and the shape of the male joint portion 35 according to the modified example 7 is a substantially barrel shape with chamfered columnar corners. ing. When the shape of the male joint part 35 according to these modified examples is employed, the male joint part 47 can only move with respect to the female joint part 48 by rotating about the axis of the male main body part 34 as a rotation axis.

  As can be seen from the modified examples 5 to 7, the present invention is not limited to the movable joint structure in which the male joint portion adopts a spherical ball joint, but the movable range is limited to some extent where the male joint portion has a shape other than a sphere. Similar effects can be obtained even when the movable joint structure is adopted.

DESCRIPTION OF SYMBOLS 1 Doll 2 Head part 3 Upper torso part 4 Lower torso part 5 Torso part 6 Upper arm part 7 Forearm part 8 Hand part 9 Arm part 10 Thigh part 11 Tibial part 12 Leg part 13 Leg part 14 Exterior member 15 Skeletal member 16 Movable joint structure DESCRIPTION OF SYMBOLS 17 Male joint part 18 Female joint part 19 Male main body part 20 Male joint part 21 Female main body part 22 Hollow part 23 Female joint part 24 Support piece 25,26 Opening 27 First inner wall part 28 Second inner wall part 29 Female main body part 30 Female Joint part 31 Screw hole 32 Bolt 33 Nut 34 Male body part 35 Male joint part 36 Split groove 37 Female joint part 38 Third inner wall part 39 First inner wall part 40 Second inner wall part 41 Female joint part 42 First inner wall part 43 First Two inner wall parts 44 Female joint part 45 First inner wall part 46 Second inner wall part 47 Male joint part 48 Female joint part

Claims (5)

It has a male joint part positioned on one side with respect to the figure joint and a female joint part positioned on the other side. The male joint part is provided with a male joint part, and the male joint part slides on the female joint part. In the movable joint structure in which a female joint part that is movably fitted is provided and both parts are connected by fitting the male joint part into the female joint part,
The female joint portion is formed with a hollow portion having two openings directed in different directions, and the inner wall of the hollow portion is positioned on the outer side of the hollow portion from one opening side to the other opening side. A first inner wall portion having an inner surface extending without going inward to the opening end and an inner surface extending without going inward from the other opening side to one opening end positioned outside the hollow portion from the other opening side A male joint having a second inner wall portion, and an inner surface located on one opening side of the first inner wall portion and an inner surface located on the other opening side of the second inner wall portion are fitted in the hollow portion of the female joint portion A movable joint structure characterized by being slidably in contact with the outer surface of the part. The inner surface located on one opening side of the first inner wall portion and the inner surface located on the other opening side of the second inner wall portion are slidably in surface contact with the outer surface of the male joint portion fitted in the hollow portion of the female joint portion. The movable joint structure according to claim 1. The movable joint structure according to claim 1, wherein the inner wall of the hollow portion is formed by alternately arranging the first inner wall portion and the second inner wall portion. The movable joint structure according to any one of claims 1 to 3, wherein either one or both of the joint portions have elasticity. The figure provided with the movable joint structure in any one of Claims 1 thru | or 4.

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