Locking structure

Abstract

To provide a lock structure capable of regulating erroneous insertion of a male lock into a clearance.SOLUTION: A lock structure includes a male lock 11 which is formed in a first structure body 10, a female lock 21 which is formed in a second structure body 20 and into which the male lock can be inserted, a clearance which is formed adjacently to the female lock in the second structure body and allows deflection occurring in the female lock during insertion of the male lock into the female lock, and a regulating portion 23 which is formed in the second structure body and regulates insertion of the male lock into the clearance.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a locking structure.

Background Art

[0002] Patent Document 1 discloses a technique related to a locking structure for locking a cover of a protector to a protector main body. This locking structure includes a male locking portion having a locking piece erected and formed by extending from the cover and an engaging protrusion protruding in the plate thickness direction of the locking piece, and a female locking portion formed on a side wall of the protector main body and having an engaging portion that guides the locking piece and locks the engaging protrusion. The side wall has a notch formed in a part of the side wall to allow displacement of the locking piece due to elastic deformation of the locking piece.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a locking structure such as a protector, when the female locking portion and the fixed shape of the vehicle or the like are adjacent to each other, a clearance portion that allows the deflection of the female locking portion that occurs when the male locking portion is inserted may be formed adjacent to the female locking portion. In such a configuration, there is a possibility that the male locking portion may be erroneously inserted into the clearance portion.

[0005] An object of the present invention is to provide a locking structure that can regulate the erroneous insertion of the male locking into the clearance portion. Department

Means for Solving the Problems

[0006] ​The locking structure of the present invention comprises a male lock portion formed on a first structure, a female lock portion formed on a second structure into which the male lock portion can be inserted, a clearance portion formed adjacent to the female lock portion on the second structure to allow deflection in the female lock portion when the male lock portion is inserted into the female lock portion, and a restricting portion formed on the second structure to restrict the insertion of the male lock portion into the clearance portion. [Effects of the Invention]

[0007] The locking structure according to the present invention is a male lock for the clearance portion. Department This has the effect of preventing the incorrect insertion of [something]. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view showing a locking structure according to an embodiment. [Figure 2] Figure 2 is a perspective view showing the female lock portion in the lock structure according to the embodiment. [Figure 3] Figure 3 is a cross-sectional view showing a cross-section of the lock structure according to the embodiment along the first direction. [Figure 4] Figure 4 is a cross-sectional view showing a cross-section of the lock structure according to the embodiment along the first direction. [Figure 5] Figure 5 is a perspective view showing the female lock portion in a lock structure according to a first modified example of the embodiment. [Figure 6] Figure 6 is a cross-sectional view showing a cross-section of a lock structure according to a first modified embodiment, along the first direction. [Figure 7] Figure 7 is a perspective view showing the female lock portion in a lock structure according to a second modified example of the embodiment. [Figure 8] Figure 8 is a cross-sectional view showing a cross-section along the first direction of a lock structure according to a second modified embodiment. [Figure 9] Figure 9 is a perspective view showing the female lock portion in a lock structure according to a third modified example of the embodiment. [Figure 10]Figure 10 is a cross-sectional view showing a cross-section along the first direction of a lock structure according to a third modified embodiment. [Modes for carrying out the invention]

[0009] The following describes in detail, with reference to the drawings, a lock structure according to an embodiment of the present invention. However, this embodiment does not limit the present invention. Furthermore, the components in the following embodiments include those that are easily conceivable by those skilled in the art or that are substantially identical.

[0010] [Embodiment] An embodiment will be described with reference to Figures 1 to 4. This embodiment relates to a locking structure. Figure 1 is a perspective view showing the locking structure according to the embodiment, Figure 2 is a perspective view showing the female locking portion in the locking structure according to the embodiment, Figure 3 is a cross-sectional view showing a cross section along the first direction of the locking structure according to the embodiment, and Figure 4 is a cross-sectional view showing a cross section along the first direction of the locking structure according to the embodiment.

[0011] The lock structure 100 of this embodiment shown in Figure 1 is applied to a protector that constitutes a wire harness. As shown in Figure 1, the lock structure 100 according to this embodiment includes a male lock portion 11, a female lock portion 21, a clearance portion 22, and a restricting portion 23. In this embodiment, the male lock portion 11 is formed on the first structure 10, which is the lid member of the protector. The female lock portion 21, the clearance portion 22, and the restricting portion 23 are formed on the second structure 20, which is the base member of the protector. The lock structure 100 according to this embodiment is a structure for locking the lid member assembled to the base member to the base member. In other words, the lock structure 100 is a structure that locks the first structure 10 (lid member) to the second structure 20 (base member) by the engagement of the male lock portion 11 and the female lock portion 21. Here, the base member is a component that constitutes the protector and forms a housing space for housing wiring materials, etc. Furthermore, the lid member is assembled to the base member and covers the wiring materials, etc., that are placed in the storage space of the base member.

[0012] Here, a protector is incorporated into a wire harness routed through a vehicle, and is installed, for example, under the vehicle floor (for example, around the bottom of the console box). A wire harness is a bundle of multiple wiring materials used for power supply and signal communication to connect various devices mounted on a vehicle, and these multiple wiring materials are connected to each device using connectors, etc. Examples of wiring materials include metal rods, electric wires, and bundles of electric wires. A metal rod is a conductive rod-shaped member with an insulating coating covering the outside.

[0013] In the following description, of the three intersecting directions, the first direction is referred to as the "first width direction X," the second direction as the "height direction Y," and the third direction as the "second width direction Z." Here, the first width direction X, the height direction Y, and the second width direction Z are mutually orthogonal. In this embodiment, the first width direction X is the direction along which the female lock portion 21 and the clearance portion 22 are adjacent. The height direction Y is the direction along which the male lock portion 11 is inserted into the female lock portion 21. The second width direction Z is the direction along the width direction of the female lock portion 21 and the clearance portion 22. Furthermore, unless otherwise specified, the directions used in the following description refer to the directions when the first structure 10 and the second structure 20 are assembled, that is, when the male lock portion 11 is inserted into the female lock portion 21 and the male lock portion 11 and the female lock portion 21 are engaged.

[0014] Furthermore, in the height direction Y, the upper side corresponds to the side on which the first structure 10 is positioned relative to the second structure 20 when the first structure 10 and the second structure 20 are assembled. Also, in the height direction Y, the lower side corresponds to the side on which the second structure 20 is positioned relative to the first structure 10 when the first structure 10 and the second structure 20 are assembled.

[0015] The male locking portion 11 is formed on the outer wall of the first structure 10 and extends downward in the height direction Y. The male locking portion 11 includes an arm portion 11a and a locking projection 11b. The arm portion 11a extends downward from the outer wall of the first structure 10 in the height direction Y and is a plate-shaped portion that spreads along the height direction Y and the second width direction Z. The locking projection 11b is formed at the lower end of the arm portion 11a and protrudes in the direction from the female locking portion 21 toward the clearance portion 22.

[0016] As shown in FIGS. 1 and 2, the female locking portion 21 is formed as an opening in the second structure 20. The female locking portion 21 is formed so that the male locking portion 11 can be inserted. In the embodiment, when viewed from above, the female locking portion 21 is formed as a substantially rectangular opening with the short side direction as the first width direction X and the second width direction Z as the longitudinal direction. Also, as shown in FIG. 3, the insertion port 21a of the male locking portion 11 in the female locking portion 21 has a tapered shape in which the opening width in the first width direction X decreases from the upper side to the lower side in the height direction Y. That is, the insertion port 21a of the female locking portion 21 has a tapered shape for guiding the male locking portion 11 from the outer wall portion of the female locking portion 21 toward the central opening when the male locking portion 11 is inserted. 1st width direction The clearance portion 22 is a portion that allows the deflection that occurs in the female locking portion 21 when the male locking portion 11 is inserted into the female locking portion 21. The clearance portion 22 is formed as an opening in the second structure 20 and is formed adjacent to the female locking portion 21 in the second structure 20. In the embodiment, the shape of the clearance portion 22 when viewed from the upper side in the height direction Y is substantially the same as the shape of the female locking portion 21 when viewed from the upper side in the height direction Y. When the male locking portion 11 is inserted into the female locking portion 21, the clearance portion 22 allows the deflection that occurs in the female locking portion 21 by the wall portion separating the opening of the female locking portion 21 and the opening of the clearance portion 22 deflecting toward the clearance portion 22 side.

[0017]

[0018] ​The restricting portion 23 is a part that restricts the insertion of the male lock portion 11 into the clearance portion 22. In this embodiment, the clearance portion 22 has an opening 21a adjacent to the insertion opening 21a of the female lock portion 21 and an open end 22a, and the restricting portion 23 is formed to close the open end of the clearance portion 22.

[0019] The restricting portion 23 in the embodiment is a strip-shaped member extending along the first width direction X. The restricting portion 23 in the embodiment is partially formed to close the central portion of the open end 22a of the clearance portion 22. That is, the restricting portion 23 is formed to traverse the central portion of the clearance portion 22 in the second width direction Z along the first width direction X.

[0020] In this embodiment, the restricting portion 23 includes a first straight portion 23a, a second straight portion 23b, and a bent portion 23c. The first straight portion 23a is a plate-shaped portion that extends from the wall portion on the female lock portion 21 side of the clearance portion 22 in the first width direction X. The first straight portion 23a extends from the upper end of the wall portion on the female lock portion 21 side of the clearance portion 22. The second straight portion 23b is a plate-shaped portion that extends from the wall portion on the opposite side of the female lock portion 21 side of the clearance portion 22 in the first width direction X. In this embodiment, the upper end of the wall portion on the opposite side of the female lock portion 21 side of the clearance portion 22 is located above the upper end of the wall portion on the female lock portion 21 side of the clearance portion 22, and the second straight portion 23b extends from the wall surface of the wall portion on the opposite side of the female lock portion 21 side of the clearance portion 22. The bent portion 23c is a folded portion provided between the first straight portion 23a and the second straight portion 23b.

[0021] Here, the bent portion 23c is formed to bend when the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22 bends toward the clearance portion 22, thereby reducing the stress on the restricting portion 23. In other words, in the restricting portion 23, the bent portion 23c is a part that accommodates the change in shape of the clearance portion 22 that occurs when the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22 bends toward the clearance portion 22.

[0022] In this embodiment, the restricting portion 23 is formed as a strip-shaped portion bent at the bending portion 23c so as to be convex upwards. That is, when viewed from the second width direction Z, the restricting portion 23 is formed in an inverted V shape with the bending portion 23c as its apex.

[0023] The restricting portion 23 has an inclined surface 23s that is inclined toward the insertion opening 21a of the female lock portion 21. In the embodiment, the upper surface of the first straight portion 23a is the inclined surface 23s. In the embodiment, the inclined surface 23s and the insertion opening 21a form a continuous inclined surface. As shown in Figure 4, when attempting to insert the male lock portion 11 into the clearance portion 22, the restricting portion 23 contacts the male lock portion 11, thereby restricting the insertion of the male lock portion 11 into the clearance portion 22. Then, in this state, when attempting to move the male lock portion 11 further downward, the male lock portion 11 is guided toward the opening of the female lock portion 21 by the inclined surface 23s, as indicated by arrow Y1.

[0024] In this embodiment, the length of the first straight section 23a in the first width direction X is set to be longer than the length of the second straight section 23b in the first width direction X. For example, the length of the second straight section 23b in the first width direction X is set to a length that makes it difficult for the tip of the male lock section 11 to enter between the wall portion of the clearance section 22 on the side opposite to the female lock section 21 and the bent section 23c. For example, by making the length of the first straight section 23a in the first width direction X longer than the length of the second straight section 23b in the first width direction X, the function of guiding the male lock section 11 to the female lock section 21 can be improved.

[0025] In this embodiment, the locking projection 11b of the male lock portion 11 has a substantially triangular cross-section in the first width direction X. The locking projection 11b protrudes toward the clearance portion 22 in the first width direction X from the bottom to the top, and an inclined surface 11ba is formed on the lower side of the locking projection 11b, while a locking surface 11bb is formed on the upper side of the locking projection 11b. The female lock portion 21 has a locking surface 21b at the lower end of the wall portion separating the opening of the female lock portion 21 from the opening of the clearance portion 22, which is locked by the locking surface 11bb of the male lock portion 11. In addition, in the male lock portion 11, the length of the locking projection 11b in the first width direction X is set to be slightly longer than the length of the female lock portion 21 in the first width direction X, and the length of the arm portion 11a in the first width direction X is formed to be slightly shorter than the length of the female lock portion 21 in the first width direction X.

[0026] The male lock portion 11 is inserted so as to widen the opening of the female lock portion 21 in the first width direction X by the locking projection 11b. The lower end face (locked surface 21b) of the wall portion separating the opening of the female lock portion 21 and the opening of the clearance portion 22 is formed to be located above the locking surface 11bb at the insertion completion position of the male lock portion 11, and comes into contact with the locking surface 11bb when the male lock portion 11 reaches the insertion completion position. Here, the "insertion completion position" of the male lock portion 11 refers to the position of the male lock portion 11 when the male lock portion 11 and the female lock portion 21 are engaged. In the height direction Y, when the locking projection 11b passes through the wall portion separating the opening of the female lock portion 21 and the opening of the clearance portion 22 and the male lock portion 11 reaches the insertion completion position, the deflection of the female lock portion 21 is eliminated and the locking surface 11bb and the locked surface 21b come into contact. With this configuration, the male locking portion 11 and the female locking portion 21 engage with each other, thereby locking the first structure 10 to the second structure 20.

[0027] As described above, the lock structure 100 according to the embodiment includes a male lock portion 11 formed on the first structure 10, a female lock portion 21 formed on the second structure 20 into which the male lock portion 11 can be inserted, a clearance portion 22 formed adjacent to the female lock portion 21 on the second structure 20 to allow deflection in the female lock portion 21 when the male lock portion 11 is inserted into the female lock portion 21, and a restricting portion 23 formed on the second structure 20 to restrict the insertion of the male lock portion 11 into the clearance portion 22.

[0028] In the embodiment, the lock structure 100 can prevent the male lock portion 11 from being incorrectly inserted into the clearance portion 22 by the restricting portion 23 when assembling the first structure 10 and the second structure 20. This configuration makes it possible to perform the assembly work of the first structure 10 and the second structure 20 smoothly.

[0029] Furthermore, in the lock structure 100 according to the embodiment, the clearance portion 22 has an open end portion 22a adjacent to the insertion opening 21a of the male lock portion 11 in the female lock portion 21, and the restricting portion 23 is formed to close the open end portion 22a and has an inclined surface 23s that is inclined toward the insertion opening 21a.

[0030] In the embodiment of the lock structure 100, the restricting portion 23 has an inclined surface 23s that is inclined toward the insertion opening 21a of the female lock portion 21. Therefore, when the male lock portion 11 comes into contact with the inclined surface 23s, the male lock portion 11 can be guided to the insertion opening 21a of the female lock portion 21. This configuration makes it easy, for example, to insert the male lock portion 11 into the female lock portion 21.

[0031] Furthermore, in the lock structure 100 according to the embodiment, the clearance portion 22 has an open end portion 22a adjacent to the insertion opening 21a of the male lock portion 11 in the female lock portion 21, and the restricting portion 23 is partially formed to close the central portion of the open end portion 22a.

[0032] In the lock structure 100 according to the embodiment, since the restricting portion 23 is partially formed to block the central portion of the open end 22a, for example, compared to the case where the restricting portion 23 is formed to block the entire open end 22a, the function of allowing the female lock portion 21 to bend in the clearance portion 22 is well maintained, while the restricting portion 23 can prevent the male lock portion 11 from being incorrectly inserted into the clearance portion 22.

[0033] [First variation] Next, a first modified example of the embodiment will be described with reference to Figures 5 and 6. The first modified example of the embodiment relates to a locking structure. Figure 5 is a perspective view showing the female lock portion in the locking structure according to the first modified example of the embodiment, and Figure 6 is a cross-sectional view showing a cross-section of the locking structure according to the first modified example of the embodiment along the first direction.

[0034] In the lock structure 100 according to the first modified example, the difference from the lock structure 100 according to the above-described embodiment is that the restricting portion 23 is formed in a cantilevered manner. The other configurations of the lock structure 100 according to the first modified example are the same as those of the lock structure 100 according to the above-described embodiment.

[0035] In the first modified example, as shown in Figure 5, the restricting portion 23 protrudes from the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22 so as to block the open end 22a of the clearance portion 22. An inclined surface 23s is formed on the upper surface of the restricting portion 23, and the inclined surface 23s and the insertion opening 21a of the female lock portion 21 form a continuous inclined surface.

[0036] In the first modified example, as shown in Figure 6, the regulating portion 23 has a thickness in the height direction Y that increases towards the side opposite to the female lock portion 21, and its cross-section in the first width direction X is formed in a roughly triangular prism shape. For example, in the first width direction X, the length between the wall portion of the clearance portion 22 opposite to the female lock portion 21 and the regulating portion 23 is set to a length that allows the regulating portion 23 to restrict the insertion of the male lock portion 11 into the clearance portion 22. For example, in the first width direction X, the length between the wall portion of the clearance portion 22 opposite to the female lock portion 21 and the regulating portion 23 is set to be shorter than the length of the locking projection 11b in the first width direction X.

[0037] In the lock structure 100 according to the first modified example, by forming the restricting portion 23 in a cantilever shape, it is possible to suppress the restricting portion 23 from hindering the shape change of the clearance portion 22 when the deflection of the female lock portion 21 is permitted by the clearance portion 22. Therefore, while maintaining the function of allowing the deflection of the female lock portion 21 to be permitted by the clearance portion 22, the restricting portion 23 can prevent the male lock portion 11 from being incorrectly inserted into the clearance portion 22. Furthermore, by forming the restricting portion 23 in a triangular prism shape, the rigidity of the restricting portion 23 can be increased compared to, for example, the case in which the restricting portion 23 is plate-shaped. With this configuration, for example, when the locking projection 11b comes into contact with the restricting portion 23, the free end side of the restricting portion 23 deflects downward, and it is possible to suppress the locking projection 11b from getting stuck between the wall portion of the clearance portion 22 on the side opposite to the female lock portion 21 and the free end of the restricting portion 23. Furthermore, by forming the restricting portion 23 in a triangular prism shape, the strength of the restricting portion 23 can be improved.

[0038] [Second variation] Next, a second modification of the embodiment will be described with reference to Figures 7 and 8. The second modification of the embodiment relates to a locking structure. Figure 7 is a perspective view showing the female lock portion in the locking structure according to the second modification of the embodiment, and Figure 8 is a cross-sectional view showing a cross-section of the locking structure according to the second modification of the embodiment along the first direction.

[0039] In the second modified lock structure 100, the difference from the lock structure 100 according to the above embodiment is that the plate-shaped restricting portion 23 is formed in a cantilevered manner. The other configurations of the second modified lock structure 100 are the same as those of the lock structure 100 according to the above embodiment.

[0040] In the second modified example, as shown in Figure 7, the restricting portion 23 protrudes from the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22 so as to close the open end 22a of the clearance portion 22. The restricting portion 23 protrudes from the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22 with its free end facing upward. An inclined surface 23s is formed on the upper surface of the restricting portion 23, and the inclined surface 23s and the insertion opening 21a of the female lock portion 21 form a continuous inclined surface.

[0041] As shown in Figure 8, the restricting portion 23 is formed with a gap between the wall portion of the clearance portion 22 opposite to the female lock portion 21 side and the free end of the restricting portion 23. This gap is set such that, for example, when the wall portion separating the opening of the female lock portion 21 and the opening of the clearance portion 22 flexes during insertion of the male lock portion 11, the restricting portion 23 does not come into contact with the wall portion of the clearance portion 22 opposite to the female lock portion 21 side. Furthermore, this gap is set such that, for example, the male lock portion 11 cannot pass between the wall portion of the clearance portion 22 opposite to the female lock portion 21 side and the restricting portion 23.

[0042] In the second modified lock structure 100, by forming the restricting portion 23 in a cantilevered shape, it is possible to suppress the restricting portion 23 from hindering the shape change of the clearance portion 22 when the deflection of the female lock portion 21 is permitted by the clearance portion 22. Therefore, while maintaining the function of allowing the deflection of the female lock portion 21 to be permitted by the clearance portion 22, the restricting portion 23 can prevent the male lock portion 11 from being erroneously inserted into the clearance portion 22.

[0043] [Third variation] Next, a third modification of the embodiment will be described with reference to Figures 9 and 10. The third modification of the embodiment relates to a locking structure. Figure 9 is a perspective view showing the female lock portion in the locking structure according to the third modification of the embodiment, and Figure 10 is a cross-sectional view showing a cross-section of the locking structure according to the third modification of the embodiment along the first direction.

[0044] In the lock structure 100 according to the third modified example, the difference from the lock structure 100 according to the above-described embodiment is that the first straight portion 23a of the restricting portion 23 extends from the upper end of the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22, and the second straight portion 23b of the restricting portion 23 extends from the upper end of the wall on the opposite side of the female lock portion 21 in the clearance portion 22. Also, as shown in Figure 9, in the height direction Y, the position of the upper end of the female lock portion 21 and the position of the upper end of the clearance portion 22 are substantially the same, and the upper end of the female lock portion 21 and the upper end of the clearance portion 22 are inclined downward from one side to the other in the second width direction Z. The other configurations of the lock structure 100 according to the third modified example are the same as those of the lock structure 100 according to the above-described embodiment.

[0045] In the third modified example, as shown in Figure 9, the restricting portion 23 is formed to connect the upper end of the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22 with the upper end of the wall in the clearance portion 22 on the side opposite to the female lock portion 21. As shown in Figure 10, the first straight portion 23a is inclined upward in the height direction Y and extends from the upper end of the wall separating the opening of the female lock portion 21 and the opening of the clearance portion 22, and has an inclined surface 23s on its upper surface. The second straight portion 23b extends upward along the height direction Y from the upper end of the wall in the clearance portion 22 on the side opposite to the female lock portion 21. The bent portion 23c is a folded portion provided between the first straight portion 23a and the second straight portion 23b, and is formed to bend when the wall portion separating the opening of the female lock portion 21 and the opening of the clearance portion 22 flexes toward the clearance portion 22, thereby reducing the stress on the restricting portion 23.

[0046] In the third modified lock structure 100, the first straight section 23a is formed at an angle, and the second straight section 23b is formed along the height direction, thereby improving the function of guiding the male lock section 11 that is in contact with the restricting section 23 to the female lock section 21.

[0047] In the embodiments and modifications described above, the lock structure 100 was described as being applied to a protector, but it is not limited to this. For example, the lock structure 100 can also be applied to the housing of an electrical junction box, etc. Here, an electrical junction box is a device that houses a circuit board with electronic components such as relays and fuses mounted inside a housing, and is commonly referred to as a relay box or junction box.

[0048] The embodiments and modifications disclosed above can be combined and implemented as appropriate. [Explanation of symbols]

[0049] 10: First structure 11: Osrock Department 11a: Arm section 11b: Locking protrusion 11ba: Slope 11bb:Latching surface 20:Second structure 21: Messrock Department 21a: Insertion port 21b: Locked surface 22: Clearance section 22a: Open end 23: Regulatory Department 23a: 1st straight section 23b: 2nd straight section 23c: Bent part

Claims

1. A male lock portion formed on the first structure, A female lock portion formed in the second structure into which the male lock portion can be inserted, In the second structure, a clearance portion is formed adjacent to the female lock portion, which allows for the deflection that occurs in the female lock portion when the male lock portion is inserted into the female lock portion, A restricting portion is formed in the second structure and restricts the insertion of the male lock portion into the clearance portion, Equipped with, The clearance portion has an open end adjacent to the insertion opening of the male lock portion in the female lock portion, The restricting portion has a first straight portion extending from the wall portion on the female lock portion side of the clearance portion, a second straight portion extending from the wall portion on the opposite side of the female lock portion in the clearance portion, and a bent portion provided between the first straight portion and the second straight portion, and is formed to close the open end as a strip-shaped portion bent at the bent portion so as to be convex toward the side of the second structure where the first structure is located relative to the second structure. Locking mechanism.

2. The first straight section has an inclined surface that is inclined toward the insertion opening, The locking structure according to claim 1.

3. The restricting portion is partially formed to close the central portion of the open end, The locking structure according to claim 1 or 2.

4. In the direction in which the female lock portion and the clearance portion are adjacent, the length of the first straight portion is longer than the length of the second straight portion. The locking structure according to claim 2.

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