Case

Abstract

To provide a case capable of suppressing occurrence of half engagement caused by positional displacement.SOLUTION: A case 1 includes: a first case comprising a sidewall extending in a first direction X, a plurality of first claws 25 disposed on the sidewall in the first direction and a plurality of projections 26 corresponding to the plurality of first claw; and a second case 3 comprising a plurality of first lock parts 35 locking the plurality of first claws and a plurality of hole parts, in which the plurality of projections is inserted, fitted with the first case and storing an electric wire therein. The projection includes a sidewall 26d protruding in an engage direction Z, in which the first claws and the first lock parts are engaged, and turned in the first direction. The side face is tilted with respect to the engage direction in such a manner that a width of the projection in the first direction becomes narrow toward a tip end of the projection. The side face guides the projection into the hole part, such that the first claw 25 is located at such a position that it can be engaged with the first lock part 35.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a case.

Background Art

[0002] Conventionally, there is a case for accommodating electric wires. Patent Document 1 discloses a case for absorbing the excess length of a wire harness connected to a slide sheet. A locking frame for locking with a locking piece provided on the peripheral wall of the lid is provided on the peripheral wall of the main body in this excess length absorbing case.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Due to expansion, contraction, variations, etc. of the case caused by heat, misalignment may occur between a pair of engaging portions that engage with each other. When a plurality of engaging portions are arranged side by side along a straight line direction in the case, it is desirable to be able to suppress the occurrence of semi-engagement due to misalignment.

[0005] An object of the present invention is to provide a case capable of suppressing the occurrence of semi-engagement due to misalignment.

Means for Solving the Problems

[0006] The case of the present invention includes a first case having a side wall portion extending in a first direction, a plurality of first claw portions disposed on the side wall portion along the first direction, and a plurality of convex portions corresponding to the plurality of first claw portions, a plurality of first locking portions for locking the plurality of first claw portions, and a plurality of hole portions into which the plurality of convex portions are inserted, and a second case that fits with the first case to form a housing space for housing an electric wire. The convex portion protrudes in an engagement direction in which the first claw portion and the first locking portion engage with each other and has a side surface facing the first direction. The side surface is inclined with respect to the engagement direction such that the width of the convex portion in the first direction becomes narrower as it goes toward the tip of the convex portion. The side surface positions the first claw portion at a position where it can engage with the first locking portion by guiding the convex portion into the hole portion.

Effect of the Invention

[0007] In the case according to the present invention, the side surface of the convex portion of the first case positions the first claw portion of the first case at a position where it can engage with the first locking portion of the second case by guiding the convex portion into the hole portion of the second case. According to the case of the present invention, there is an effect that it is possible to suppress the occurrence of semi-engagement due to displacement.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0009] Hereinafter, the case according to the embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by this embodiment. In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[0010] [Embodiment] Embodiments will be described with reference to FIGS. 1 to 11. This embodiment relates to a case. FIG. 1 is a perspective view of the case according to the embodiment, FIG. 2 is an exploded perspective view of the case according to the embodiment, FIG. 3 is a perspective view of the first case according to the embodiment, FIG. 4 is a side view of the first case according to the embodiment, FIG. 5 is a cross-sectional view of the first case according to the embodiment, FIG. 6 is a perspective view of the second case according to the embodiment, FIG. 7 is a perspective view of the first locking portion and the hole portion according to the embodiment, FIG. 8 is a plan view of the first locking portion and the hole portion according to the embodiment, FIG. 9 is a cross-sectional view of the case according to the embodiment, FIG. 10 is a side view of the case according to the embodiment, and FIG. 11 is a cross-sectional view of the case according to the embodiment. FIG. 5 shows the V-V cross section of FIG. 4.

[0011] As shown in FIGS. 1 and 2, the case 1 of the present embodiment has a first case 2 and a second case 3. The first case 2 and the second case 3 are formed of, for example, an insulating synthetic resin. The case 1 is configured to accommodate an electric wire and is a protector for protecting the power supply electric wire. The case 1 is connected to, for example, the slide rail of a vehicle. In this case, the electric wire drawn out from the case 1 is routed to the slide rail and connected to a slide body such as a slide sheet.

[0012] In a plan view, the shape of Case 1 is substantially rectangular. In this specification, the longitudinal direction of Case 1 is referred to as the first direction X. Also, in a plan view, the direction orthogonal to the first direction X is referred to as the second direction Y. The second direction Y is the width direction of Case 1. The direction orthogonal to both the first direction X and the second direction Y is referred to as the engagement direction Z. The engagement direction Z is the direction in which the first case 2 engages with the second case 3.

[0013] The first case 2 and the second case 3 are engaged by a plurality of lock structures 4 and a lock structure 5. The plurality of lock structures 4 are arranged along the first direction X. The case 1 of the present embodiment is configured such that the lock structure 4 can engage even when the first case 2 or the second case 3 expands or contracts due to heat or the like.

[0014] As shown in FIG. 2, the first case 2 has a recess 20 for accommodating an electric wire. More specifically, the first case 2 has a flat main wall 21 and a peripheral wall 22 surrounding the main wall 21. The peripheral wall 22 stands upright in the engagement direction Z from the edge of the main wall 21. The recess 20 is a space formed by the main wall 21 and the peripheral wall 22. The peripheral wall 22 has a pair of side wall portions 22a and 22b extending in the first direction X. The pair of side wall portions 22a and 22b face each other in the second direction Y.

[0015] Further, the peripheral wall 22 has arc wall portions 22c and 22d curved toward the first direction X. The arc wall portion 22c is disposed at the first end portion 2a of the first case 2, and the arc wall portion 22d is disposed at the second end portion 2b of the first case 2. The first end portion 2a is one end of the first case 2 in the first direction X. The second end portion 2b is the other end of the first case 2 in the first direction X.

[0016] A plurality of engaging portions 23 are arranged along the first direction X on each of the side wall portions 22a and 22b. In the illustrated first case 2, five engaging portions 23 are provided on each of the side wall portions 22a and 22b. In the following description, when distinguishing the five engaging portions 23, they are sequentially referred to as engaging portions 23A, 23B, 23C, 23D, and 23E from the side of the first end portion 2a to the side of the second end portion 2b. The five engaging portions 23 are arranged at equal intervals along the first direction X. An engaging portion 24 is provided at the first end portion 2a of the first case 2. Note that no engaging portion is provided at the second end portion 2b of the first case 2. In other words, among the plurality of engaging portions 23 and 24 of the first case 2, the engaging portion 23E is the engaging portion located on the side of the second end portion 2b most in the first direction X.

[0017] The shape of the second case 3 in plan view is substantially rectangular. The second case 3 fits with the first case 2 to form a housing space for housing an electric wire. The second case 3 has a flat main wall 31 and a peripheral wall 32 surrounding the main wall 31. The peripheral wall 32 stands upright from the edge of the main wall 31 in the engaging direction Z. When the case 1 is mounted on a vehicle, the main wall 21 and the main wall 31 face each other in the vehicle up-and-down direction. Therefore, one of the main wall 21 and the main wall 31 becomes a top wall located on the upper side, and the other becomes a bottom wall located on the lower side. The main wall 31 closes the recess 20 of the first case 2 and forms a housing space for housing an electric wire.

[0018] The peripheral wall 32 has a pair of side wall portions 32a and 32b extending in the first direction X. One side wall portion 32a faces the side wall portion 22a of the first case 2. The other side wall portion 32b faces the side wall portion 22b of the first case 2. The pair of side wall portions 32a and 32b face each other in the second direction Y. The peripheral wall 32 has arc wall portions 32c and 32d curved toward the first direction X. The arc wall portion 32c is arranged at the first end portion 3a of the second case 3, and the arc wall portion 32d is arranged at the second end portion 3b of the second case 3. The first end portion 3a corresponds to the first end portion 2a of the first case 2, and the second end portion 3b corresponds to the second end portion 2b of the first case 2.

[0019] A plurality of engaging portions 33 are arranged along the first direction X on each of the side wall portions 32a and 32b. In the illustrated second case 3, five engaging portions 33 are provided on each of the side wall portions 32a and 32b. The five engaging portions 33 are arranged at equal intervals. In the following description, when distinguishing the five engaging portions 33, they are sequentially referred to as engaging portions 33A, 33B, 33C, 33D, and 33E from the side of the first end portion 3a to the side of the second end portion 3b. The locking structure 4 is constituted by the engaging portion 23 of the first case 2 and the engaging portion 33 of the second case 3. A second locking portion 34 is provided at the first end portion 3a of the second case 3. The locking structure 5 is constituted by the engaging portion 24 of the first case and the second locking portion 34 of the second case 3.

[0020] As shown in FIG. 3, each engaging portion 23 of the first case 2 has one first claw portion 25 and one convex portion 26. The first claw portion 25 is provided on the outer surfaces of the side wall portions 22a and 22b and is arranged at the end portions of the side wall portions 22a and 22b in the engaging direction Z. The first claw portion 25 protrudes in the second direction from the side wall portions 22a and 22b. As shown in FIG. 5, the shape of the first claw portion 25 in a cross section orthogonal to the first direction X is substantially triangular. The protruding amount of the first claw portion 25 with respect to the side wall portions 22a and 22b decreases as it moves away from the main wall 21 along the engaging direction Z.

[0021] The first claw portion 25 has a contact surface 25a and an inclined surface 25b. The contact surface 25a is the surface that is locked by the engaging portion 33 of the second case 3. The contact surface 25a faces the side of the main wall 21. It is a surface facing the second direction Y and is inclined with respect to the engaging direction Z. More specifically, the inclined surface 25b is inclined so as to move away from the side wall portions 22a and 22b as it approaches the main wall 21 along the engaging direction Z.

[0022] The convex portion 26 is arranged corresponding to the first claw portion 25. More specifically, the convex portion 26 is aligned with the first claw portion 25 in the engagement direction Z, and is arranged on the side opposite to the side of the main wall 21 with respect to the first claw portion 25. As shown in FIG. 4, the convex portion 26 provided on the side wall portion 22b is formed so as to bulge the end face in the engagement direction Z of the side wall portion 22b in the engagement direction Z. Similarly, the convex portion 26 of the side wall portion 22a is formed so as to bulge the end face of the side wall portion 22a. The convex portion 26 has a base portion 26a and a tip portion 26b. The base portion 26a is a portion connected to the side wall portions 22a and 22b. The tip portion 26b is the tip portion in the protruding direction of the convex portion 26.

[0023] The inclined surface 25b of the first claw portion 25 is connected to the base portion 26a of the convex portion 26. As shown in FIG. 5, the shape of the convex portion 26 when viewed from the first direction X is a tapered shape. The convex portion 26 is formed such that the thickness in the second direction Y decreases toward the tip portion 26b. The convex portion 26 has an inclined surface 26c continuous with the inclined surface 25b of the first claw portion 25.

[0024] As shown in FIG. 5, the engaging portion 23 of the side wall portion 22a and the engaging portion 23 of the side wall portion 22b face each other in the second direction Y. The shape of the engaging portion 23 of the side wall portion 22a and the shape of the engaging portion 23 of the side wall portion 22b are the same.

[0025] As shown in FIG. 4, the convex portion 26 has a side surface 26d facing the first direction X. In the first case 2 of the present embodiment, in the convex portion 26 of the engaging portions 23B, 23C, 23D, 23E, the side surface 26d is inclined with respect to the engaging direction Z. On the other hand, in the convex portion 26 of the engaging portion 23A closest to the first end portion 2a, the side surface 26d is parallel to the engaging direction Z. That is, in the engaging portion 23A close to the first end portion 2a, the side surface 26d is not inclined with respect to the engaging direction Z, and in the other engaging portions 23B, 23C, 23D, 23E, the side surface 26d is an inclined surface for guiding. The inclined side surface 26d is inclined with respect to the engaging direction Z such that the width Wd of the convex portion 26 becomes narrower as it goes toward the tip of the convex portion 26. The width Wd is the width of the convex portion 26 in the first direction X. Note that the side surface 26d of the engaging portion 23A may also be inclined with respect to the engaging direction Z.

[0026] The side surface 26d has an inclination angle θ with respect to the engaging direction Z. In Case 1 of the present embodiment, the inclination angle θ increases as it moves away from the first end portion 2a along the first direction X. The side surface 26d of the engaging portion 23B has an inclination angle θb. Similarly, the side surfaces 26d of the engaging portions 23C, 23D, 23E have inclination angles θc, θd, θe, respectively. These inclination angles are defined as in the following formula (1). θb < θc < θd < θe (1)

[0027] Note that the setting of the inclination angle θ described above is an example. The values of the inclination angles θ of the respective engaging portions 23B, 23C, 23D, 23E are determined according to the coefficient of thermal expansion of the first case 2 and the coefficient of thermal expansion of the second case 3.

[0028] As shown in FIG. 3, the engaging portion 24 has a second claw portion 27 and a convex portion 28. The second claw portion 27 projects in the second direction Y from the outer surface of the arc wall portion 23c. The cross-sectional shape of the second claw portion 27 is the same as the cross-sectional shape of the first claw portion 25. The convex portion 28 protrudes from the end surface of the arc wall portion 23c. The shape of the convex portion 28 is the same as the shape of the convex portion 26 of the engaging portion 23A.

[0029] As shown in FIG. 6, the engaging portion 33 of the second case 3 is provided at the corner where the main wall 31 and the side wall portions 32a and 32b intersect. The engaging portion 33 is formed so as to notch this corner. As shown in FIGS. 7 and 8, the engaging portion 33 has a first locking portion 35 that locks the first claw portion 25 and a hole portion 36 into which the convex portion 26 is inserted.

[0030] The first locking portion 35 is formed to penetrate the side wall portions 32a and 32b. The shape of the first locking portion 35 in a front view seen from the second direction Y is rectangular. The first locking portion 35 has a locking surface 35a and a pair of opposing surfaces 35b. The locking surface 35a is a surface that locks the first claw portion 25 of the first case 2. The locking surface is a surface facing the engagement direction Z and faces the side of the main wall 31.

[0031] The opposing surfaces 35b are surfaces that extend along the engagement direction Z from the locking surface 35a toward the side of the main wall 31. The pair of opposing surfaces 35b face each other in the first direction X. The end portion on the side of the main wall 31 in the first locking portion 35 is open.

[0032] The hole portion 36 is formed to penetrate the main wall 31. The shape of the hole portion 36 in a plan view seen from the engagement direction Z is rectangular. The hole portion 36 has a pair of opposing surfaces 36a. The opposing surfaces 36a extend in the second direction Y from the opposing surfaces 35b of the first locking portion 35. As shown in FIG. 8, the hole portion 36 is formed to the back side in the second direction Y from the inner surface 32i of the peripheral wall 32. The engaging portion 23 of the first case 2 is inserted into the engaging portion 33 along the inner surface 32i. The width of the hole portion 36 in the second direction Y is designed to be able to receive the convex portion 26 of the engaging portion 23. The opposing surfaces 35b and 36a are located on the same plane orthogonal to the first direction X. The shapes of the engaging portion 33 of the side wall portion 32a and the engaging portion 33 of the side wall portion 32b are the same.

[0033] FIG. 8 shows the width We in the first direction X of the hole portion 36. The width We of the hole portion 36 is determined so that the convex portion 26 can be received. In Case 1 of the present embodiment, the width We of the hole portion 36 increases as it moves away from the first end portion 3a along the first direction X. The values of the width We of each engaging portion 33A, 33B, 33C, 33D, 33E are determined according to the coefficient of thermal expansion of the first case 2 and the coefficient of thermal expansion of the second case 3.

[0034] As shown in FIG. 6, the second locking portion 34 is provided on the arc wall portion 32c. The second locking portion 34 bulges toward the first direction X. The second locking portion 34 has a rectangular frame shape for locking the second claw portion 27 of the first case 2.

[0035] The engagement process between the first case 2 and the second case 3 will be described. The engagement process is a process of engaging the engaging portion 24 of the first case 2 with the second locking portion 34 of the second case 3 and engaging each engaging portion 23 of the first case 2 with each engaging portion 33 of the second case 3. In the engagement process, first, the second claw portion 27 of the engaging portion 24 is engaged with the second locking portion 34 by an operator. That is, the lock structure 5 disposed at the first end portions 2a and 3a is first brought into an engaged state. Next, the engaging portion 23A near the first end portion 2a is engaged with the corresponding engaging portion 33A. Further, in order from the side near the first end portions 2a and 3a, the engaging portions 23B, 23C, 23D, 23E are engaged with the engaging portions 33B, 33C, 33D, 33E in this order.

[0036] FIG. 9 shows the engaging portion 23B when it is engaged with the engaging portion 33B. The position of the convex portion 26 with respect to the hole portion 36 is shifted in the first direction X. In this case, the tip of the convex portion 26 having a tapered shape enters the hole portion 36. When the convex portion 26 is further pushed into the hole portion 36, the side surface 26d of the convex portion 26 is guided by the opposing surface 36a of the hole portion 36. The opposing surface 36a guides the convex portion 26 toward the center of the hole portion 36. That is, the opposing surface 36a adjusts the position of the convex portion 26 in the first direction X so as to reduce the displacement of the convex portion 26 with respect to the hole portion 36.

[0037] FIG. 10 shows the first claw portion 25 engaged with the first locking portion 35. The first claw portion 25 is guided between two opposing surfaces 35b of the first locking portion 35. That is, the convex portion 26 is configured to position the first claw portion 25 between the two opposing surfaces 35b by being guided by the hole portion 36. As an example of such a configuration, the base portion 26a of the convex portion 26 has a width wider than that of the first claw portion 25. Therefore, when the base portion 26a abuts against the opposing surface 36a of the hole portion 36, the first claw portion 25 is positioned in the space between the two opposing surfaces 35b. Thus, in case 1 of the present embodiment, half-engagement between the first locking portion 35 and the first claw portion 25 is suppressed, and appropriate engagement is achieved.

[0038] FIG. 11 shows the engaging portion 23E when engaged with the engaging portion 33E. The engaging portions 23E and 33E are the engaging portions farthest from the first end portions 2a and 3a. In the engaging portion 23E, the side surface 26d of the convex portion 26 has a large inclination angle θe. That is, the engaging portions 23E and 33E can correspond to a large deviation in the first direction X and can be appropriately engaged. Since the convex portion 26 of the engaging portion 23E has a small width at the tip, it can easily enter the hole portion 36.

[0039] When engaging a plurality of locking structures 4 from the side of the first end portions 2a and 3a toward the side of the second end portions 2b and 3b, the amount of deviation between the engaging portion 23 and the engaging portion 33 may increase on the side of the second end portions 2b and 3b. In contrast, in case 1 of the present embodiment, since the inclination angle θ is large on the side of the second end portions 2b and 3b, it is possible to correct the misalignment and appropriately engage the locking structure 4.

[0040] As described above, Case 1 of the present embodiment has a first case 2 and a second case 3. The first case 2 has side wall portions 22a and 22b extending in the first direction X, a plurality of first claw portions 25, and a plurality of convex portions 26 corresponding to the plurality of first claw portions 25. The plurality of first claw portions 25 are arranged on the side wall portions 22a and 22b along the first direction X. The second case 3 has a plurality of first locking portions 35 for locking the plurality of first claw portions 25 and a plurality of hole portions 36 into which the plurality of convex portions 26 are inserted. The second case 3 fits with the first case 2 to form a housing space for housing an electric wire.

[0041] The convex portion 26 protrudes in the engagement direction Z in which the first claw portion 25 and the first locking portion 35 engage with each other, and has a side surface 26d facing the first direction X. The side surface 26d of the convex portion 26 included in the engaging portions 23B, 23C, 23D, and 23E is inclined with respect to the engagement direction Z such that the width Wd of the convex portion 26 in the first direction X becomes narrower as it goes toward the tip of the convex portion 26. The side surface 26d positions the first claw portion 25 at a position where it can engage with the first locking portion 35 by guiding the convex portion 26 into the hole portion 36.

[0042] In Case 1 of the present embodiment, the inclined side surface 26d positions the first claw portion 25 at a position where it can engage with the first locking portion 35. Therefore, Case 1 can correct the misalignment of the engaging portions 23 and 33 due to the expansion, contraction, variation, etc. of the first case 2 or the second case 3, and enable the engaging portions 23 and 33 to engage with each other. In the present embodiment, the side surface 26d is inclined at the engaging portions 23B, 23C, 23D, and 23E that are at least far from the first end portions 2a and 3a. Thereby, the occurrence of semi-engagement or non-engagement in the locking structure 4 is suppressed. Note that the side surface 26d may be inclined at all the engaging portions 23.

[0043] The first case 2 of the present embodiment has a first end portion 2a that is one end in the first direction X and a second end portion 2b that is the other end in the first direction X. As going from the first end portion 2a toward the second end portion 2b, the inclination angle θ of the side surface 26d with respect to the engagement direction Z increases. Therefore, semi-engagement is appropriately suppressed in each of the plurality of locking structures 4.

[0044] The first claw portion 25 of the present embodiment protrudes in the second direction Y orthogonal to the first direction X. The first case 2 has a second claw portion 27 provided at the first end portion 2a. The second claw portion 27 protrudes in the first direction X. The second case 3 has a second locking portion 34 for locking the second claw portion 27. When there is the second claw portion 27 whose protruding direction is different from that of the first claw portion 25 in this way, it is better in workability to engage the second claw portion 27 first. Then, as going from the first end portion 2a toward the second end portion 2b, by increasing the inclination angle θ of the side surface 26d with respect to the engaging direction Z, it becomes possible to easily engage the plurality of lock structures 4.

[0045] Note that the resin of the first case 2 and the resin of the second case 3 may be different resins. In this case, the coefficient of thermal expansion may be different between the resin of the first case 2 and the resin of the second case 3. When the coefficients of thermal expansion are different between the two cases, the amount of deformation of the first case 2 and the amount of deformation of the second case 3 are different for the same temperature change. On the other hand, in the case 1 of the present embodiment, by appropriately setting the inclination angle θ of the side surface 26d, half-engagement of the lock structure 4 is suppressed. As an example, the coefficient of thermal expansion of the first case 2 may be smaller than the coefficient of thermal expansion of the second case 3. Also, the resin of the first case 2 may be a harder resin than the resin of the second case 3.

[0046] The hole portion 36 of the second case 3 does not have to be a through hole. For example, the hole portion 36 may be a recess provided in the main wall 31 of the second case 3.

[0047] The number of the engaging portions 23 provided in the first case 2 is not limited to the illustrated number. Also, the intervals between the plurality of engaging portions 23 arranged in the first direction X are not limited to equal intervals.

[0048] The contents disclosed in the above embodiments can be executed by being appropriately combined.

Explanation of Reference Numerals

[0049] 1: Case 2: First case, 2a: First end portion, 2b: Second end portion 3: Second case, 3a: First end, 3b: Second end 4, 4A, 4B, 4C, 4D, 4E: Lock structure 5: Lock structure 20: Recess 21: Main wall, 22: Peripheral wall, 22a, 22b: Side wall portions, 22c, 22d: Arc wall portions 23, 23A, 23B, 23C, 23D, 23E: Engaging portions, 24: Engaging portion 25: First claw portion, 25a: Contact surface, 25b: Inclined surface 26: Protrusion, 26a: Base portion, 26b: Tip portion, 26c: Inclined surface, 26d: Side surface 31: Main wall, 32: Peripheral wall, 32a, 32b: Side wall portions, 32c, 32d: Arc wall portions 33, 33A, 33B, 33C, 33D, 33E: Engaging portions, 34: Second locking portion 35: First locking portion, 35a: Locking surface, 35b: Opposing surface 36: Hole portion, 36a: Opposing surface Wd: Width of the protrusion, We: Width of the hole portion X: First direction, Y: Second direction, Z: Engaging direction θ: Inclination angle

Claims

1. A first case having a side wall portion extending in a first direction, a plurality of first claw portions arranged on the side wall portion along the first direction, and a plurality of convex portions corresponding to the plurality of first claw portions; A second case having a plurality of first locking portions for locking the plurality of first claw portions and a plurality of hole portions into which the plurality of convex portions are inserted, and forming a housing space for housing an electric wire by fitting with the first case; Comprising: The convex portion protrudes in an engaging direction in which the first claw portion and the first locking portion engage with each other, and has a side surface facing the first direction; The side surface is inclined with respect to the engaging direction such that the width of the convex portion in the first direction becomes narrower as it goes toward the tip of the convex portion; The side surface positions the first claw portion at a position where it can engage with the first locking portion by guiding the convex portion into the hole portion; The first case has a first end portion that is one end in the first direction and a second end portion that is the other end in the first direction; The inclination angle of the side surface with respect to the engaging direction increases from the first end portion toward the second end portion A case characterized by the above.

2. The first claw portion protrudes in a second direction orthogonal to the first direction; The first case has a second claw portion provided at the first end portion; The second claw portion protrudes in the first direction; The second case has a second locking portion for locking the second claw portion The case according to claim 1.

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