Clamping structure

Abstract

According to the invention, the dismounting operation of the box body and the cover body which are fixed through buckle assembling can be rapidly carried out. The locking structure includes a claw portion (101) formed on the fitting portion (122) and protruding from an outer peripheral surface (123) of the fitting portion (122). The claw portion (101) includes an inclined surface (102) and a recess portion (103) formed on the inclined surface (102), the wall thickness of the inclined surface (102) being thinner further away from the head portion (121). The recess (103) includes a bottom surface (104) inclined with respect to the outer peripheral surface (123) so as to approach the outer peripheral surface (123) inward from the inlet portion. The recess (103) includes a vertical surface (105) adjacent to the bottom surface (104) and perpendicular to the outer peripheral surface (123).

Description

Technical Field

[0001] The invention relates to a locking structure assembled by means of snap fit. Background Art

[0002] For example, in monitoring and controlling various equipment attached to a building or controlling facilities, a control system including a control device or a machine management device is used. The control system exchanges signals with on-site machines such as processing machines or various sensors installed on-site and connected via a network. In such a control system, there are a large number of machines (controlled machines) that are controlled and monitored.

[0003] In order to perform the control, a modular control machine is used, which includes a machine body and a terminal board to which the machine body is detachably mounted (Patent Document 1, Patent Document 2). The module used in this control machine contains a control circuit substrate in a frame. In addition, in order to facilitate the repair, replacement, and reuse of the control circuit substrate, the frame is composed of a box and a cover so that it is detachable. In order to fit the cover to the box, a snap assembly is used to lock the claw provided on the cover to the locking portion provided on the box.

[0004] When disassembling the box body and the cover body that are engaged by snap assembly, the claw portion is pressed into the engaging portion of the box body to release the locked state and pull out the cover body. When pressing the claw portion, a tool such as a flathead screwdriver is used.

[0005] [Prior art literature]

[0006] [Patent Document]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2009-282665

[0008] [Patent Document 2] Japanese Patent Application Publication No. 2000-148214

[0009] [Patent Document 3] Japanese Patent Application Laid-Open No. 07-180711 Summary of the invention

[0010] [Problems to be solved by the invention]

[0011] However, the claw of the snap assembly is formed with an inclined surface on the upper surface so that it can be easily inserted when the cover is fitted into the box. On the other hand, in order to prevent the cover fitted into the box from falling off easily, the side surface of the engaging portion of the box is set to be perpendicular to the inner peripheral surface of the box, and the part of the claw that is locked to the engaging portion of the box is set to be a surface perpendicular to the inner peripheral surface of the box. Therefore, when the claw is pressed in with a tool to separate the box and the cover, since the surface pressed by the tool is an inclined surface, it is difficult to get stuck and is easy to slip, making it difficult to press. Therefore, there has been a problem in the past that the disassembly operation of the box and the cover fixed by the snap assembly cannot be carried out quickly.

[0012] The present invention is made to solve the above-mentioned problems, and aims to enable the disassembly operation of the box body and the cover body fixed by snap fitting to be carried out quickly.

[0013] [Technical means to solve the problem]

[0014] The locking structure of the present invention is a locking structure assembled with the aid of a snap as described below, that is, the locking portion of the cover body including the head and the locking portion is locked to the inner peripheral surface of the opening of the box body, and the locking structure comprises: a claw portion, formed on the locking portion, protruding from the outer peripheral surface of the locking portion; and a slit, formed at the opening end of the box body and penetrating through the side wall of the box body, for the claw portion to engage from the inside, the claw portion comprising an inclined surface whose wall thickness becomes thinner as it is farther away from the head and a recessed portion formed on the inclined surface, the recessed portion comprising: a bottom surface, inclined relative to the outer peripheral surface in a manner of approaching the outer peripheral surface from the entrance portion toward the inside; and an abutment surface, provided adjacent to the bottom surface.

[0015] In one structural example of the locking structure, the abutment surface is a vertical surface perpendicular to the outer peripheral surface.

[0016] In one structural example of the locking structure, the abutment surface is a tapered surface that is not perpendicular to the outer peripheral surface.

[0017] [Effects of the Invention]

[0018] As described above, according to the present invention, the recessed portion is formed on the inclined surface of the claw portion, and the recessed portion is provided with an inclined bottom surface. Therefore, the box body and the cover body fixed by snap fitting can be quickly removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view showing a partial structure of a locking structure according to an embodiment of the present invention.

[0020] Figure 2 It is a perspective view showing the structure of the locking structure according to the embodiment of the present invention.

[0021] Figure 3It is a perspective view showing a partial structure of a locking structure according to an embodiment of the present invention.

[0022] [Explanation of Symbols]

[0023] 101: Claw

[0024] 102: Inclined surface

[0025] 103: concave part

[0026] 104: Bottom

[0027] 105: contact surface

[0028] 120: Cover

[0029] 121: Head

[0030] 122: Chimeric part

[0031] 123: Outer surface

[0032] 130: Cabinet

[0033] 131: Slit

[0034] 132: Side DETAILED DESCRIPTION

[0035] Below, refer to Figure 1 , Figure 2 , Figure 3 The locking structure of the embodiment of the present invention is described below. Figure 3 As shown, the following is a locking structure by snap assembly, that is, the fitting part 122 of the cover 120 including the head 121 and the fitting part 122 is fitted and locked to the inner peripheral surface of the opening of the box 130. The cover 120 and the box 130 are made of engineering plastics, for example.

[0036] First, the locking structure includes a claw 101, which is formed on the fitting portion 122 and protrudes from the outer peripheral surface 123 of the fitting portion 122. In addition, the locking structure includes a slit 131, which is formed at the opening end of the box body 130 and penetrates the side wall of the box body 130, and is engaged from the inside by the claw 101. The cover body 120 is locked to the box body 130 by the claw 101 being engaged with the side surface 132 of the slit 131 as the engaging portion.

[0037] The claw portion 101 includes an inclined surface 102 whose wall thickness decreases as it moves away from the head portion 121, and a recessed portion 103 formed on the inclined surface 102. Furthermore, the recessed portion 103 includes a bottom surface 104 which is inclined relative to the outer peripheral surface 123 in a manner that approaches the outer peripheral surface 123 from the entrance portion inward. Furthermore, the recessed portion 103 includes a contact surface 105 adjacent to the bottom surface 104. In the drawings, the contact surface 105 is shown as a vertical surface perpendicular to the outer peripheral surface 123.

[0038] For example, the front end of the tool is pushed toward the intersection of the bottom surface 104 and the abutment surface 105 from the direction of the perpendicular line of the outer peripheral surface 123 and against the recessed portion 103, and the claw portion 101 is pressed in, thereby releasing the engagement of the claw portion 101 with the side surface 132 of the slit 131, and the cover body 120 can be separated from the box body 130. According to the embodiment, since the recessed portion 103 is provided, the front end of the tool is less likely to slip.

[0039] Furthermore, since the bottom surface 104 is inclined relative to the outer peripheral surface 123, the front end of the tool is unlikely to fall off from the recess 103, and the front end of the tool naturally faces the abutment surface 105. In the case where the bottom surface 104 is a surface parallel to the outer peripheral surface 123, the front end of the rear portion may slip due to the deviation of the insertion angle of the front end of the tool toward the recess 103, and fall off from the recess 103. In contrast, by providing the bottom surface 104, even if the insertion angle of the front end of the tool toward the recess 103 deviates slightly, the direction in which the front end slips is limited to the direction of the abutment surface 105, so that it can be prevented from falling off from the recess 103.

[0040] As described above, according to the embodiment, the claw portion 101 can be stably pressed in using a tool, so that a quick operation can be performed.

[0041] As described above, according to the present invention, the recessed portion is formed on the inclined surface of the claw portion, and the recessed portion is provided with an inclined bottom surface. Therefore, the detachment operation of the box body and the cover body fixed by snap fitting can be performed quickly.

[0042] In addition, the present invention is not limited to the above-described embodiments, and it is obvious that various modifications and combinations can be implemented by those skilled in the art within the technical concept of the present invention. As an example, the case where the recess includes a collision surface adjacent to the bottom surface and perpendicular to the outer peripheral surface is described, but a tapered surface having an angle that is not perpendicular to the outer peripheral surface can be provided as the collision surface.

Claims

1. A locking structure is a locking structure assembled by means of a buckle, that is, the locking portion of the cover body including the head and the locking portion is locked and locked on the inner peripheral surface of the opening of the box body, and the locking structure has: a claw portion formed on the fitting portion and protruding from an outer peripheral surface of the fitting portion; as well as A slit is formed at the opening end of the box body through the side wall of the box body, and the claw part is engaged from the inside. The claw portion includes an inclined surface whose wall thickness becomes thinner as it moves away from the head portion and a recessed portion formed on the inclined surface. The recess includes: A bottom surface is inclined relative to the outer peripheral surface in a manner approaching the outer peripheral surface from the entrance portion toward the inside; and an abutting surface, which is arranged adjacent to the bottom surface.

2. The locking structure according to claim 1, wherein The abutting surface is a vertical surface perpendicular to the outer peripheral surface.

3. The locking structure according to claim 1, wherein The abutting surface is a tapered surface that is not perpendicular to the outer peripheral surface.

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