JP2006346206A - Assembly unit for toy and transforming toy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a crack from being generated on a pair of side walls surrounding a recessed part for engagement. <P>SOLUTION: A plurality of component units are connected by a projection part 109 for engagement and the recessed part 111 for engagement. The projection part 109 for engagement is constituted of a base 113, a planar part 115 extended in a direction of separating from the base and an engaging part side overhung part 117 provided on the end of the planar part. The recessed part 111 for engagement is surrounded by a pair of flexible side walls 121 integrally provided with an overhung part 119 on the side of a part to be engaged for stopping the detachment of the engaging part side overhung part 117 on a end part and a bottom wall 123 connecting the base parts of the pair of wall parts. On the bottom wall 123 constituting the recessed part 111 for engagement, a through-hole 129 extended along a gap 127 formed between a pair of overhung parts 119 on the side of the part to be engaged provided respectively on the pair of side wall 121 and passing through the bottom wall 123 in the direction of approaching the gap is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a toy assembly unit that connects a first component unit and a second component unit via a connection mechanism, and to a form deformed toy using the same.

The applicant has proposed Japanese Patent Application No. 2003-423874 as a toy assembly unit of this type and a deformed toy using this unit. The structure of the coupling mechanism employed in the toy assembly unit and the deformed toy proposed in this Japanese Patent Application No. 2003-423874 has not been proposed before this application in the toy field.
As shown in FIG. 8, the toy assembly unit includes an engagement portion 3 provided at two locations on the first component unit 1 side, and an engagement portion provided on the pair of second component units 5 side. 3 is provided with an engaged portion 7 having a structure in which 3 is detachably engaged.

  The engaging part 3 is constituted by one of an engaging convex part 9 and an engaging concave part 11 detachably engaged with the engaging convex part 9. The engaged portion 7 is constituted by the other of the engaging convex portion 9 and the engaging concave portion 11. In FIG. 8, the engaging portion 3 is constituted by the engaging convex portion 9, and the engaged portion 7 is constituted by the engaging concave portion 11.

The engaging convex portion 9 includes a plate-like base 13, a plate-like portion 15 provided integrally with the base 13 and extending in a plate shape perpendicular to the direction away from the base 13, and the tip of the plate-like portion 15. The cylindrical engagement portion side overhanging portion 17 is provided so as to be integrated with the plate-like portion 15. Further, the engaging recess 11 is arranged with a predetermined interval, and sandwiches the plate-like portion 15 and the engaging portion side overhanging portion 17 so as to prevent the engaging portion side overhanging portion 17 from coming off at the tip portion. a pair of side walls 21, 21 having flexibility with the engaged portion side projecting portion 19 of the pillar together, which is composed surrounded by a bottom wall 23 connecting the base of the pair of side walls 21 and 21 ing.

The engaging convex portion 9 and the engaging concave portion 11 are formed of a synthetic resin material. When engaging the engaging convex portion 9 and the engaging concave portion 11, the engaging portion side protruding portion 17 of the engaging convex portion 9 is connected to the left and right engaged portion side protruding portions 19 of the engaging concave portion 11, Push between 19. Then, the engagement portion side overhanging portion 17 is inserted between the engaged portion side overhanging portions 19 and 19 by bending the ends of the pair of side walls 21 and 21 outward by the engagement portion side overhanging portion 17. . As a result, the plate-like portion 15 of the engaging convex portion 9 is sandwiched between the left and right engaged portion side protruding portions 19 and 19, and the engaging portion side protruding portion 17 is held between the left and right engaged portion side protruding portions 19 and 19. It is prevented from coming off and connected.
Japanese Patent Application No. 2003-423874

However, in the engaging concave portion 11 having the conventional structure, the engaging portion side protruding portion 17 of the engaging convex portion 9 is pushed between the left and right engaged portion side protruding portions 19, 19 of the engaging concave portion 11, and pulling out the engaging portion side protruding portion 17 from between the engaged portion side projecting portion 19, 19 repeating (disengagement operation), be cracked pair of side walls 21 and 21 and bottom wall 23 there were.

An object of the present invention is to provide a toy assembly unit that can prevent cracks from occurring on the bottom wall of a recess for engagement or the base side of a pair of side walls even when the engagement / disengagement operation is repeated.

  Another object of the present invention is for a toy that can easily push the engaging portion side projecting portion of the engaging convex portion between the left and right engaged portion side projecting portions of the engaging concave portion from the longitudinal ends thereof. It is to provide an assembly unit.

  Another object of the present invention is to provide an assembly unit for toys that is easy to bend and can improve the mechanical strength of the bottom wall when the ends of the pair of side walls of the engaging recess are bent outward.

  Another object of the present invention is to provide a toy assembly unit capable of easily bending a pair of side walls of an engaging recess.

Another object of the present invention is to provide a deformed toy that can prevent cracks from entering the bottom wall of the engaging recess of the coupling mechanism and the base side of the pair of side walls .

In the toy assembly unit of the present invention, the first component unit and the second component unit are provided on the first component unit side, and on the second component unit side and engaged. And an engaged portion having a structure in which the portion is detachably engaged. The engaging portion is configured by one of an engaging convex portion and an engaging concave portion that is detachably engaged with the engaging convex portion. The engaged portion is constituted by the other of the engaging convex portion and the engaging concave portion. The engaging convex portion is provided integrally with the base, the plate-like portion provided integrally with the base and extending in a direction away from the base, and the plate-like portion so as to follow the tip of the plate-like portion. And an engaging portion side overhanging portion. The engaging recesses are arranged at a predetermined interval, with the plate-like portion and the engaging portion side overhanging portion sandwiched therebetween, and the engaged portion side overhang that aims to prevent the engaging portion side overhanging portion from coming off at the tip portion. It is surrounded by a pair of flexible side walls provided integrally with a base and a bottom wall connecting the bases of the pair of side walls. In particular, the bottom wall described above includes one or more extending along a gap formed between a pair of engaged portion side protruding portions provided on the pair of side walls and penetrating the bottom wall in a direction toward the gap. Through-holes are formed.

  When one or more such through holes are provided in the bottom wall for forming the recesses for engagement, the bottom wall portion remaining around the through holes can be easily removed when the ends of the pair of side walls are bent outward. It bends so that the width | variety may become convex in the direction toward the above-mentioned gap, and the width | variety becomes narrow. As a result, it is possible to make the pair of side walls bend more easily than in the past, and when the engaging portion side protruding portion of the engaging convex portion is pushed between the left and right engaged portion side protruding portions of the engaging concave portion, And when pulling out from there, it can prevent that a crack enters into the base part side of the bottom wall of a recessed part for engagement, or a pair of side wall. Therefore, according to this invention, the lifetime of the recessed part for engagement is extended, and reliability can be improved.

  In addition, the length in the direction along the gap of the engaged portion side overhanging portion is made shorter than the length in the direction along the gap of the pair of side walls, and the both ends in the direction along the gap of the tip portion of the pair of side walls. It is preferable that the engaged portion side overhanging portion does not exist. In this case, the engagement portion side overhanging portion of the engagement convex portion is first placed in a place where there is no overhanging portion side overhanging portion at both ends in the direction along the gap between the tip portions of the pair of side walls. When one end part enters, thereafter, the engaging convex part can be smoothly inserted between the pair of engaged part side projecting parts. Therefore, even if the engaging operation (insertion operation) is performed in a positional relationship where the engaging convex portion and the engaging concave portion do not face each other, the engaging convex portion and the engaging concave portion can be engaged with each other without any trouble.

  The plurality of through holes are preferably formed side by side along the gap. If it does in this way, when the space | interval between the front-end | tips of a pair of side wall of the recessed part for engagement will bend outside by the through-hole of these bottom walls, it will become easy to bend.

  Moreover, it is preferable that a pair of side wall and bottom wall are integrally shape | molded by the synthetic resin material. When the above-described structure is employed, the pair of side walls surrounding the engaging recess can be easily bent by making the maximum use of the flexibility of the synthetic resin material.

  The present invention is configured by connecting a plurality of component units via one or more connecting mechanisms each including an engaging portion and an engaged portion having a structure engaging with the engaging portion. Change the connection combination of units, replace another part unit prepared in advance with a part of a plurality of part units using a connection mechanism, or replace another part unit prepared in advance using a connection mechanism Naturally, it can also be applied to a deformed toy that changes its appearance by adding it to a component unit.

In the form deformed toy according to the present invention, the engaging portion is constituted by one of the engaging convex portion and the engaging concave portion that is detachably engaged with the engaging convex portion, and the engaged portion is the engaging convex portion and the engaging convex portion. The engagement concave portion is constituted by the other of the combination concave portions, the base, the plate-like portion provided integrally with the base and extending away from the base, and the plate so as to follow the tip of the plate-like portion. An engaging portion side projecting portion provided integrally with the shaped portion, the engaging concave portions are arranged at a predetermined interval, and the plate-like portion and the engaging portion side projecting portion are sandwiched therebetween, and the tip portion And a pair of flexible side walls integrally provided with an engaged portion side overhang portion for preventing the engagement portion side overhang portion from being detached, and a bottom wall connecting the base portions of the pair of side walls. The bottom wall constituting the engaging recess is configured with a pair of covers provided on the pair of side walls, respectively. Wherein the one or more through-holes penetrating the bottom wall in a direction towards the and the gap extends along the gap formed between the coupling portion side projecting portion is formed.

  According to the present invention, since the one or more through holes are provided in the bottom wall for forming the engaging recess, the bottom remaining around the through holes when the ends of the pair of side walls are bent outward. The wall portion can be easily curved so as to be convex in the direction toward the gap and bent so that the width thereof is narrowed, and the pair of side walls can be bent more easily than in the past. As a result, when the engaging portion side projecting portion of the engaging convex portion is pushed between the left and right engaged portion side projecting portions of the engaging concave portion or pulled out from the engaging concave portion, It is possible to prevent cracks from entering the base side of the side wall. Therefore, according to the present invention, there is an advantage that the life of the recess for engagement is extended and the reliability can be improved.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

1A and 1B to FIG. 4A and FIG. 4B show an example of the best mode for carrying out the present invention, and FIG. 1A and FIG. 1B show this example. FIG. 2A, FIG. 2B, FIG. 2C, and FIG. 2B are perspective views showing the structure of the engaging portion and the engaged portion used in the toy assembly unit of FIG. D), (E), and (F) are a front view, a plan view, a bottom view, a left side view, a right side view, and a line AA in FIG. 2B of the engaged portion used in this example. Cross-sectional views, FIGS. 3A, 3B, 3C, and 3D are explanatory views showing the fitting process of the engaging portion and the engaged portion used in this example, and FIGS. B) is an explanatory view showing a process of fitting the engaging portion used in this example from the longitudinal end of the engaged portion. In this example, parts similar to the previously proposed components shown in FIG. 8 described above are denoted by the number of reference numerals added to 100 in FIG.

  In this example, the engaging convex portion 109 constitutes an engaging portion provided in a first component unit (not shown), and the engaging concave portion 111 is an engaged portion provided in a second component unit (not shown). It is composed.

  The engaging convex portion 109 is integrally formed of a synthetic resin material. As shown in FIGS. 1A and 1B, the plate-like base 113 and the base 113 are provided integrally with the base 113. A plate-like portion 115 extending in a plate shape orthogonal to the direction away from 113, and a columnar engagement portion-side protruding portion 117 provided integrally with the plate-like portion 115 so as to follow the tip of the plate-like portion 115. And is configured.

  As shown in FIGS. 1 (A) and 1 (B) and FIGS. 2 (A), (B), (C), (D), (E) and (F), the engaging recess 111 is flexible. It is formed to be surrounded by a pair of side walls 121, 121 and a bottom wall 123. The pair of side walls 121 and 121 are arranged to face each other with a gap 125 of a predetermined interval. The pair of side walls 121, 121 sandwich the plate-like portion 115 and the engaging portion side protruding portion 117 of the engaging convex portion 109. In addition, an engaged portion side overhanging portion 119 is integrally provided at the distal ends of the pair of side walls 121 and 121 in order to prevent the engagement portion side overhanging portion 117 from coming off. The bottom wall 123 connects the base portions of the pair of side walls 121 and 121. The gap 125 having the predetermined interval is determined to have a width that can accommodate the engaging portion side protruding portion 117 between the pair of side walls 121 and 121.

The bottom wall 123 constituting the engagement recess 111, through hole 129 of one rectangle shape is formed. The through hole 129 extends along a gap 127 formed between a pair of engaged portion side protruding portions 119 provided in the pair of side walls 121, 121. The through hole 129 penetrates the bottom wall 123 in the direction toward the gap 127.

The length of the engaged portion side protruding portion 119 in the direction along the gap 127 is shorter than the length of the pair of side walls 121, 121 in the direction along the gap 125. As a result, the engaged portion side overhanging portion 119 does not exist at both ends of the pair of side walls 121, 121 in the direction along the gap 125, and the engaged portion side overhanging portion does not exist. (Slits ) 131 and 131 are formed.

  The pair of side walls 121 and 121 and the bottom wall 123 having such a structure are integrally formed of a synthetic resin material. The engaging convex portion 109 is also integrally formed of a synthetic resin material. The engaging convex portion 109 and the engaging concave portion 111 are made of, for example, a synthetic resin material such as polyacetal (POM).

  As shown in FIGS. 3 (A) and 3 (B), the engaging convex portion 109 and the engaging concave portion 111 are arranged so that the engaging portion side protruding portion 117 of the engaging convex portion 109 is formed on the left and right sides of the engaging concave portion 111. Are pushed in between the overhanging portions 119 and 119 of the engaged portion side. Next, as shown in FIG. 3C, the engaging portion side protruding portion 117 bends outward between the tips of the pair of side walls 121, 121, thereby causing the engaging portion side protruding portion 117 to be engaged with these engaged portions. Insert between side projecting parts 119, 119. As a result, as shown in FIG. 3D, the plate-like portion 115 of the engaging convex portion 109 is positioned on the left and right engaged portion side protruding portions 119, 119. And the engaging part side overhang | projection part 117 is accommodated in the gap 125 between a pair of side walls 121 and 121, and the engagement part side overhang | projection part 117 is prevented from coming off by the left and right engaged part side overhang parts 119 and 119 become. As a result, the engagement between the engaging convex portion 109 and the engaging concave portion 111 is completed.

In the toy assembly unit having such a structure, the bottom wall 123 surrounding the engaging recess 111 extends along the gap 127 formed between the pair of engaged portion side protruding portions 119, 119, and the gap 127. Since one through-hole 129 that penetrates the bottom wall 123 is provided in the direction toward the bottom, the bottom wall 123 is convex toward the gap 127 when the gap between the ends of the pair of side walls 121, 121 is bent outward. To curve. As a result, the pair of side walls 121 and 121 are easily bent outward. For this reason, when the engaging portion side protruding portion 117 of the engaging convex portion 109 is pushed between the left and right engaged portion side protruding portions 119, 119 of the engaging concave portion 111, the bottom wall 123 of the engaging concave portion 111 and It is possible to prevent cracks from entering the base side of the pair of side walls 121, 121. As a result, the life of the engaging recess 111 is extended and the reliability is improved.

In addition, at the engaging portion side of the engaging convex portion 109 first, in one of the places 131 and 131 where the protruding portion on the engaged portion side at both ends in the direction along the gap 125 at the tip portion of the pair of side walls 121 and 121 does not exist. One end portion of the overhanging portion 117 enters, and thereafter, the engaging convex portion 109 can be smoothly inserted between the pair of engaged portion side overhanging portions 119 and 119. Therefore, in engaging protrusions 109 and the engaging recesses 111 transgressions Seitaishi stomach positional relationship, without any problem even if the engaging operation (insertion operation), to engage the engaging protrusions 109 and the engaging recess 111 be able to.

  A plurality of through holes 129 may be formed side by side along the gap 127 at a predetermined interval. In this way, the flexibility of the bottom wall 123 can be adjusted by adjusting the number of the plurality of through holes 129 formed in the bottom wall 123. In addition, since the portion between the adjacent through holes 129 formed in the bottom wall 123 is connected in the width direction, the mechanical strength of the bottom wall 123 is also adjusted by appropriately determining the number of through holes. Is possible.

  FIG. 5 to FIG. 7 show a specific example in which the connecting mechanism including the engaging convex portion 109 and the engaging concave portion 111 described above is used for connecting the core robot toy of the deformed toy and the large robot toy. 5 is a front view of the core robot toy, FIGS. 6A and 6B are a front view and a longitudinal sectional side view of a large robot toy not incorporating the core robot toy, and FIG. 7 is an assembly of the core robot toy. It is a partial vertical side view which shows the principal part structure of a large robot toy.

  In this example, a large robot shown in FIGS. 6A and 6B is mounted by attaching a plurality of divided parts obtained by dividing another robot toy to the core robot toy as a core shown in FIG. The form deformation toy which comprises a toy is shown.

As shown in FIG. 5, the core robot toy 133 includes a head 135, a torso 137 having the head 135 at the top, and a pair of arms attached to the left and right of the torso 137 via joints. It is a doll robot toy provided with a part 139 and a pair of legs 141 attached to the lower part of the arm part 139 via joints. Although not shown in this drawing, the head 135 is lowered by a displacement mechanism that supports the neck below the head 135 and is lowered after the head 135 is pushed down. And to have. A light emitting display unit 138 is attached to the front surface of the body unit 137. The body portion 137 is hollow, and the upper portion is an opening. This opening is closed by the components of the displacement mechanism. In the opening, a switch that is turned on when the head 135 is pushed down and a power feeding circuit that feeds power to the light emitting display unit 138 from the battery by the operation of the switch are incorporated. When the head 135 is tilted later, the components of the displacement mechanism are also displaced, so that the upper portion of the body 137 is opened and the switch is exposed. Each leg 141 includes a thigh 141a, a shin 141b, and a foot 141c. The thigh 141a is connected to the trunk 137 by a joint 141d. The thigh 141a and the shin 141b are joints 141e. Are connected to each other. On the front surface of the thigh 141a, the above-described recess 111 for engagement is attached so that the gap 127 extends in the vertical direction of the paper surface as illustrated. Each leg portion 141 is bent as described later and is positioned behind the trunk portion 137.

As shown in FIGS. 6A and 6B and FIG. 7, the large robot toy 143 has a plurality of divided parts 145 and 147 obtained by dividing another robot toy with respect to the core robot toy 133 serving as a core. It is comprised by mounting | wearing. That is, the core robot toy 133 is compactly folded as shown in FIG. 7, and a divided part 145 is detachably connected to the upper part thereof by a male / female connection mechanism (not shown), and the divided part 147 is attached to the lower part thereof. The core robot toy 133 is detachably connected by a connection mechanism including the above-described engaging concave portion 111 and the engaging convex portion 109 incorporated in the divided component 147.

  The divided parts 145 are a box-shaped assembly part 145a that functions as a chest, a box-shaped assembly part 145b that is attached in front of the assembly part 145a, and an assembly that is attached to the upper part of the assembly part 145a and functions as a head. A component 145c and an assembly component 145e that is attached to the left and right of the assembly component 145a via a joint portion 145d and functions as an arm portion. The lower part of the box-shaped assembly part 145a is detachably connected to the upper part of the folded core robot toy 133 via a male / female connection mechanism (not shown).

  The divided component 147 includes a box-shaped assembly component 147a that functions as a waist and a pair of assembly components 147b that function as a pair of legs connected to the left and right lower portions of the assembly component 147a.

  In the core robot toy 133 assembled in a folded state, the light emitting display unit 138 is exposed between the assembly component 145a and the assembly component 147a, or through a window (not shown) provided in the assembly component 145a. It is incorporated in the large robot toy 143 in an exposed state.

The divided part 145 operates the operation unit 149 of the divided part 145 in a state of a large robot toy 143 configured by mounting a plurality of divided parts 145 and 147 on the core robot toy 133, whereby the core robot toy 133 is operated. It is configured to be able to operate the switches. In the divided component 145 provided with the operation unit 149, an operation mechanism 151 that allows the switch to be directly operated in a state of being attached to the core robot toy 133 is incorporated. Inside the plurality of assembly parts 145a and 145b, an operation mechanism 151 is divided into three operation mechanism sections 151a, 151b, and 151c. The operation mechanism 151a is located in the assembly part 145a and is configured to move up and down in the vertical direction so that the key top of the switch can be pressed. The operation mechanism portion 151b is in the assembly part 145a and is configured to move horizontally in a direction orthogonal to the tip of the operation mechanism portion 151a. Operation mechanism portion 151b is pushed more and child slides, operation mechanism portion 151a is configured to be depressed. The operation mechanism portion 151c is in the assembly component 145b, and is configured to be moved backward by moving the operation mechanism portion 151b by aligning with the proximal end of the operation mechanism portion 151b and pressing the operation mechanism portion 151c.

  The assembly part 145b on the front surface of the divided part 145 constituting the chest is configured in the shape of a lion's face.

  In this example, the large robot toy 143 enters a light-emitting display state by brightening the inside of the mouth with the lion's face wide open by the light emission of the light-emitting display unit 138 provided in the core robot toy 133.

  Note that the mounting relationship between the engaging convex portion 109 and the engaging concave portion 111 described above may be reversed.

(A) And (B) is the perspective view which shows the structure of the engaging part used in the assembly unit for toys of an example of the best form for implementing this invention, and an engaged part, and this perspective view was reversed. It is a perspective view which shows a state. (A), (B), (C), (D), (E) and (F) are a front view, a plan view, a bottom view, a left side view of the engaged portion used in this example, It is a right view and AA sectional view taken on the line of FIG. (A), (B), (C), and (D) are explanatory drawings showing the fitting process of the engaging portion and the engaged portion used in this example. (A) And (B) is explanatory drawing which shows the fitting process of the engaging part used by this example from the edge part of the longitudinal direction of a to-be-engaged part. It is a front view of a core robot toy. (A) And (B) is the front view of the large sized robot toy which is not incorporating the core robot toy, and its BB line sectional view. It is a longitudinal cross-sectional view which shows the principal part structure of the large sized robot toy incorporating the core robot toy. It is a perspective view which shows the principal part structure of the assembly unit for conventional toys.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st component unit 3 Engagement part 5 2nd component unit 7 Engagement part 9,109 Engagement convex part 11,111 Engagement convex part 13,113 Base 15,115 Plate-shaped part 17,117 Engagement Part side projecting part 19,119 Engagement part side projecting part 21,121 Wall part 23,123 Bottom wall 125,127 Gap 129 Through hole 131 Recessed part 131 Core robot toy 135 Head 137 Body part 141 Leg part 143 Large robot toy 145, 147 Division parts 149 Operation part 151 Operation mechanism

Claims (5)

The first component unit and the second component unit are engaged with the engaging portion provided on the first component unit side, and the engaging portion is provided on the second component unit side and is detachable. An engaged portion having a structure to be joined,
The engaging part is constituted by one of an engaging convex part and an engaging concave part detachably engaged with the engaging convex part, and the engaged part is constituted by the other of the engaging convex part and the engaging concave part. Configured,
The engaging convex part is provided integrally with the base, a plate-like part provided integrally with the base and extending in a direction away from the base, and the plate-like part so as to follow the tip of the plate-like part. An engaging portion side overhanging portion,
The engagement recesses are arranged at a predetermined interval so as to sandwich the plate-like portion and the engagement portion side overhanging portion therebetween and to prevent the engagement portion side overhanging portion from coming off at the tip portion. A toy assembly unit configured to be surrounded by a pair of flexible side walls integrally provided with a joint-side projecting portion and a bottom wall connecting the bases of the pair of wall portions,
The bottom wall includes one or more extending along a gap formed between the pair of engaged portion side protruding portions provided on the pair of side walls and penetrating the bottom wall in a direction toward the gap. A toy assembly unit characterized in that a through-hole is formed.   The length in the direction along the gap of the engaged portion side projecting portion is shorter than the length in the direction along the gap of the pair of side walls, and both ends of the pair of side walls in the direction along the gap. The toy assembly unit according to claim 1, wherein the engaged portion side overhanging portion does not exist in the portion.   The toy assembly unit according to claim 1, wherein the plurality of through holes are formed side by side along the gap.   The toy assembly unit according to claim 1 or 2, wherein the pair of side walls and the bottom wall are integrally formed of a synthetic resin material. A plurality of component units are connected via one or more connecting mechanisms each having an engaging portion and an engaged portion having a structure that engages with the engaging portion, and the plurality of component units are connected. The combination is changed, or another part unit prepared in advance is replaced with a part of the plurality of part units using the connection mechanism, or another part unit prepared in advance is used for the plurality of parts using the connection mechanism. It is a deformed toy that changes its appearance by adding to its parts unit,
The engaging part is constituted by one of an engaging convex part and an engaging concave part detachably engaged with the engaging convex part, and the engaged part is constituted by the other of the engaging convex part and the engaging concave part. Configured,
The engaging convex part is provided integrally with the base, a plate-like part provided integrally with the base and extending in a direction away from the base, and the plate-like part so as to follow the tip of the plate-like part. An engaging portion side overhanging portion,
The engagement recesses are arranged at a predetermined interval so as to sandwich the plate-like portion and the engagement portion side overhanging portion therebetween and to prevent the engagement portion side overhanging portion from coming off at the tip portion. Surrounded by a pair of flexible side walls provided integrally with the joint-side overhanging portion and a bottom wall connecting the base portions of the pair of wall portions,
The bottom wall constituting the engaging recess extends along a gap formed between a pair of the engaged portion side projecting portions respectively provided on the pair of side walls, and extends in the direction toward the gap. One or more through-holes which penetrate a wall are formed.