JPH0979221A - Locking structure of assembling parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking structure of assembling parts, capable of assembling a cover to a body easily without entailing any rattling, and of easily disassembling this cover as well. SOLUTION: In this locking structure that a flexible engaged frame 15 is installed in the side end of a cover 13, and a locked projection 23, where a lower end inner edge 19a of this locked frame 15 is locked tight, is projectingly installed in a side wall part 5 of a body 7, and in a state that an opening part 9 of the body 7 is closed by an upper plate part 11 of the cover 13, the locked frame 15 is engaged tight with the locked projection 23, a clearance 30 allowing any displacement to the downward of the locked frame 15 in a state of being closed, is installed in an upper end of the side wall part 5 of the body 7 at the upper part of the locked projection 23. In addition, a releasing projection 37 making a lower end 19 of the locked frame 15 displaced downward separate from the side wall part 5, is installed this side wall part 5 of the body 7 at the lower part of the locked projection 23, while the locked frame 15 is displaced downward in a state of being locked with the locked projection 23, and in a state of being displaced more downward than the assembled state, it is installed so as to make the lower end 19 separate from the side wall part 5 by the releasing projection 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for an assembling component including a box-shaped or gutter-shaped main body such as a relay box or protector and a cover for covering an opening of the main body.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a conventional locking structure for an assembling component of this type (Japanese Patent Laid-Open No. 5-252634).
Reference).

As shown in FIG. 4, a protector 51 as an assembling part has a main body 57 which is one trough-like assembling part in which a pair of side wall parts 55 are erected on both sides of a bottom wall part 53. ,
The upper plate portion 61 that covers the opening 59 of the main body 57 is composed of a cover 65 that is the other assembly component in which a pair of side plates 63 are erected downward at both ends, and the main body 57 and the cover 65 are formed. It is made of an elastic material such as synthetic resin.

A locking frame 67 is provided on the pair of side wall portions 55 of the main body 57 so as to be separated from the upper ends thereof. Locking frame 6
7 is the side wall portion 5 with a predetermined gap from the outer surface of the side wall portion 55.
5, the side wall 55 and the locking frame 67 form an insertion hole 69 penetrating vertically.

The pair of side plates 63 of the cover 65 are provided with projecting pieces 71 extending downward from the tips of the side plates 63.
Locking protrusions 73 are provided on the outer surfaces of the respective No. 1s. The locking projection 73 attaches the protruding piece 71 of the cover 65 to the main body 5
When the upper end of the side wall 55 of the main body 57 and the upper plate 61 of the cover 65 abut on the insertion hole 69 of the main body 57, the abutment can be made on the lower end of the engaging frame 67.

A recess 75 having a predetermined depth is provided at the upper end of the side wall 55 near the locking frame 67, and notches 77 are provided at both ends of the root of each protruding piece 71 formed on the cover 65.
Are formed respectively. By the recess 77, each protruding piece 71 can be displaced downward.

To assemble the cover 65 to the main body 57 having such a structure, first the cover 65 is brought close to the main body 57 from above, and the locking projection 71 of the cover 65 is brought into contact with the upper end of the insertion hole 69 of the locking frame 67. Contact. Subsequently, when the locking projection 73 is pressed into the insertion hole 69, the locking projection 73 is pressed against the inner surface of the locking frame 67 and is inserted into the insertion hole 69 while flexing inward, and the upper plate portion 61 of the cover 65 is inserted into the main body. It contacts the upper end of the side wall 55 of 57. At this time, the locking projection 73 is still located in the insertion hole 69.

When the cover 65 is further pressed, the main body 5
Since the recess 75 is provided at the upper end of the side wall 55 of 7,
The upper plate portion 61 of the cover 65 near the locking frame 67 bends downward, and the locking projection 73 can penetrate the insertion hole 69 and move downward. Then, the locking projection 73 penetrating the through hole 69 is released from the pressure state of the locking frame 67 in the inward direction, and is moved outward by the elasticity of the protruding piece 71 to be restored.

Next, when the force is removed from the cover 65, the restoring force due to the elasticity of the cover 65 is exerted on the upper plate portion 61, the locking projection 73 is pulled up, and abuts on the lower end of the locking frame 67. Can be locked. Therefore, the cover 65
Can be easily assembled to the main body 57 without any play.

Further, a cutout 7 is formed at the upper end of each protruding piece 71.
7 are provided, even if the locking frame 67 is displaced, for example, if the protruding piece 71 is deformed by pressing in the directions of arrows P and Q, as shown by the chain double-dashed line in FIG. The locking projection 73 can be locked to the locking frame 67.

[0011]

However, in such a conventional lock structure, after the cover 65 is assembled to the main body 57, the engagement between the engagement projection 73 and the engagement frame 67 is released and the cover 65 is removed. In this case, a jig is required to bend the locking frame 73 outward, and even if such a jig is used, the engagement cannot be easily released, and the work of removing the cover 65 is complicated. It was

In consideration of the above-mentioned circumstances, the present invention provides a lock structure for an assembling component that allows the cover to be easily attached to the main body without any play and allows the cover to be easily removed. It is an object.

[0013]

According to a first aspect of the present invention, there is provided a combination of a main body having a side wall portion erected from a bottom wall portion and a cover having an upper plate portion for closing an opening of the main body. A flexible locking frame projecting downward is provided at a side end of the cover of the attached component, and a locking projection for locking an inner end of the lower end of the locking frame is provided on a side wall portion of the main body. A locking structure of an assembly part in which the locking frame is locked to the locking projection in a closed state in which the opening part of the main body is closed by the upper plate part of the cover; The upper end of the side wall of the main body is provided with a gap that allows the locking frame to be displaced downward in the closed state, and the locking frame is displaced downward on the side wall of the main body below the locking projection. A release protrusion is provided to separate the inner edge of the lower end of the lock from the side wall, and the locking frame engages with the locking protrusion. Displaced downward in the assembled state,
It is characterized in that the lower end is separated from the side wall portion by the release projection in a state in which it is displaced further downward from the assembled state.

According to the first aspect of the present invention, when assembling the cover, the lower end of the locking frame is brought into contact with the upper end of the locking projection, the cover is pressed downward, and the upper plate portion of the cover is attached to the side wall of the main body. Abutting the upper end of the locking part, and further pressing the upper plate part above the locking frame downward to displace the upper plate part into the lower gap, so that the inner edge of the lower end of the locking frame falls below the locking projection. After moving to, the locking protrusion is housed in the locking frame, the force is removed from the upper plate portion. When the force is released from the upper plate, the locking frame is pulled up by the restoring force of the elasticity of the cover, and the lower edge inner edge of the locking frame is locked with the locking frame slightly displaced downward. It comes into contact with, is locked, and is locked.

Further, when removing the cover, the upper plate portion above the locking frame is pressed downward to displace the upper plate portion into the lower gap, and the lower end inner edge of the locking frame is moved below the locking projection. To move. As a result, the lower end of the locking frame moves over the release protrusion and separates from the surface of the side wall, so insert your fingertip into this separated portion and pull the cover while bending the locking frame outward with your fingertip. increase.

According to a second aspect of the present invention, there is provided the lock structure for an assembling component according to the first aspect, wherein the upper frame portion located above the gap in the assembled state has the locking frame. It is characterized in that it is provided with notches which are cut from the roots on both sides to allow the downward movement of the locking frame.

According to the invention described in claim 2, in addition to the operation of the invention described in claim 1, since the notch is provided in the upper plate portion, the locking frame can be largely displaced by a small pressing force. it can.

Even if the relative positions of the locking frame and the locking projection are deviated due to a dimensional error, if the upper plate portion above the locking frame is obliquely pressed to deform the locking frame, The locking frame can be locked to the stop projection.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a lock structure of an assembling member according to the present embodiment, and FIG. 2 is a side view as seen in the direction of arrow A in FIG.
3A and 3B are sectional views showing a method of assembling the assembling member shown in FIG. 1, where FIG. 3A is a state before assembly, FIGS. 3B and 3C are states during assembly, and FIG. The respective states after assembly are shown.

As shown in FIG. 1, the protector 1 as an assembly part has a trough shape in which a pair of side wall portions 5 (only one side is shown) are erected on both sides of the bottom wall portion 3 as in the conventional case. The main body 7, which is one of the assembled parts, and the cover 13, which is the other assembled part, having the flat plate-shaped upper plate portion 11 that covers the opening 9 of the main body 7, are formed. Is made of an elastic material such as synthetic resin. In the description below, the side wall 5 of the main body 7 is defined as the upright side (opening 9) side and the opposite direction is down.

Flexible locking frames 15 projecting downward are integrally provided at both ends of the upper plate portion 11 of the cover 13. The locking frame 15 has two vertically extending parts 17 extending downward from the upper plate part 11, and a flat part 19 as a lower end of the locking frame 15 connecting the tips of both vertically extending parts 17. , Upper plate 1
The hole 21, which is in the shape of a phrase, is defined by the 1, the vertically extending portions 17, and the flat portion 19.

On the outer surfaces of the pair of side wall portions 5 of the main body 7, locking projections 23 that are housed in the holes 21 of the locking frame 15 are provided in a protruding manner. The locking projection 23 is configured such that the upper end of the side wall portion 5 of the main body 7 and the upper plate portion 11 of the cover 13 are brought into contact with each other and the opening 9 of the main body 7 is closed by the upper plate portion 11 in a closed state.
A lower end 25 to which the upper surface 19a of the flat portion 19 that is the inner edge of the lower end of the lower end 25 can be locked, a protrusion 27 protruding downward from the outer tip of the lower end 25, and the surface of the side wall 5 from the upper side to the lower side. And an inclined surface 29 that is formed so as to separate from the lock frame 15 and bends the locking frame 15 to the outside.

A recess 31 having a predetermined depth is provided at the upper end of the side wall 5 near the locking projection 23. This recess 3
1 is for the upper plate portion 11 when the cover 13 is closed.
And a gap 30 that allows downward movement of the locking frame 15 between
To form

Further, the upper plate portion 11 located above the recess 31 in the assembled state in which the cover 13 is closed and the locking frame 15 is locked to the locking projection 23 has both outer sides of the locking frame 15. There is provided a notch 33 which is cut from the root of the base and allows the downward movement of the locking frame 15.

Below the locking projection 23 of the side wall portion 5 of the main body 7, the release projection 35 for separating the flat portion 19 of the locking frame 15 displaced downward from the assembled state from the surface of the side wall portion 5.
Is provided. The release projections 35 are provided on both outer sides of the locking projections 23 so as to come into contact with the vertically extending portions 17 of the locking frame 15, and are formed so as to separate from the surface of the side wall portion 5 from the upper side to the lower side. It has a guide surface 37 for bending the frame 15 outward.

The engaging frame 15 is slightly displaced downward in the assembled state in which the engaging frame 23 is engaged with the engaging protrusion 23, and when the engaging frame 15 is displaced further downward from the assembled state, the release projection 35 causes the flat portion 19 to move. It is separated from the surface of the side wall portion 5.

Next, the operation will be described.

To assemble the cover 13 to the main body 7 having such a structure, as shown in FIG. 3A, first, the cover 13 is brought close to the main body 7 from above the main body 7, and the locking frame 15 is flatly installed. The portion 19 is brought into contact with the upper end of the locking protrusion 23. Then, when the cover 13 is pressed downward, the flat portion 19 of the locking frame 15 is pressed.
Moves on the inclined surface 29 of the locking projection 23, the locking frame 15 bends outward due to elastic deformation, and as shown in FIG. Abut the upper end of. At this time, the flat portion 19 of the locking frame 15 is still located on the inclined surface 29. In this state, between the upper plate 11 and the recess 31 at the upper end of the side wall 7 of the main body 7,
A gap 30 that allows the locking frame 15 to be displaced downward is formed.

Further, when the upper plate portion 11 above the locking frame 15 is pressed downward (in the direction of the arrow in the figure), the upper plate portion 11 is displaced into the lower gap 30 (recess 31), as shown in FIG. ), The flat portion 19 of the locking frame 15 can move downward below the locking projection 23. Also, upper plate 1
Since the notch portion 33 is provided in 1, the locking frame 15 can be largely displaced by a small pressing force.

As a result, the locking frame 15 is released from the outward pressure state by the locking projection 23, and is moved inward by the elasticity of the locking frame 15 to be restored, and locked in the hole 21 of the locking frame 15. The protrusion 23 is accommodated.

Next, when the force is released from the upper plate portion 11, the restoring force due to the elasticity of the cover 13 acts on the upper plate portion 11, the locking frame portion 15 is pulled up, and the locking frame 15 is moved downward. In the slightly deviated state, the flat portion 19 of the locking frame portion 15 abuts and locks the lower end portion 25 of the locking projection 23.
In this assembled state, the protrusion 27 prevents the locking frame 15 from moving to the outside of the flat portion 19. As described above, the cover 13 can be easily and reliably assembled to the main body 7 without any play.

Further, the main body 7 in the assembled state shown in FIG.
In order to remove the cover 13 from the above, the upper plate portion 11 above the locking frame 15 is pressed downward (in the direction of the arrow in the drawing), and the upper plate portion 11 is largely displaced into the lower recessed portion 31. As shown in, the flat portion 19 of the locking frame 15 is moved below the locking projection 23. In this state, the flat portion 19 of the locking frame 15
Moves on the guide surface 37 of the release projection 35,
Away from the surface of. Therefore, by inserting a fingertip into this separated portion and pulling up the cover 13 while bending the flat portion 19 outward with the fingertip, it is possible to easily lock the locking frame 15 without using a jig. It can be released, and the work of removing the cover 13 can be easily performed.

Further, since the upper plate portion 11 is provided with the notch 33, even if the relative position between the locking frame 15 and the locking projection 23 is deviated due to a dimensional error, the locking is carried out as in the conventional case. When the upper plate portion 11 above the frame 15 is obliquely pressed to deform the locking frame 15, the locking projection 23 is accommodated in the hole 21 of the locking frame 15 to lock the locking frame 15. It can be locked to the protrusion 23.

In this embodiment, the locking frame 15 is directly provided on the upper plate portion 11 of the cover 13 in a protruding manner. However, the present invention is not limited to this and both side ends of the upper plate portion 11 as in the conventional example. Alternatively, a pair of side plates may be provided upright, and the locking frame 15 may be provided on the side plates.

Further, when the side wall portion 5 is erected around the entire circumference of the bottom wall portion 3 to form a box-shaped main body, or when one side of the cover 13 is connected to the main body 7 through a hinge and the other side is engaged. Even when the stop frame 15 is provided, the same effect can be obtained.

[0037]

As described above, according to the first aspect of the present invention, the lower end of the locking frame is brought into contact with the upper end of the locking projection, the cover is pressed downward, and the upper plate portion of the cover is pressed. Abutting against the upper end of the side wall of the main body, further pressing the upper plate part above the locking frame downward, displacing the upper plate part into the lower gap,
After moving the inner edge of the lower end of the locking frame below the locking projections and housing the locking projections in the locking frame, the force is removed from the upper plate portion, and the elastic force of the cover restores the locking force. The stopper frame is pulled up, and the inner edge of the lower end of the locking frame is brought into contact with and locked by the locking projection in a state where the locking frame is displaced downward, so that the cover can be easily and loosely attached to the main body. Can be assembled without.

Further, the upper plate portion above the locking frame is pressed downward from the assembled state to displace the upper plate portion into the lower gap, and the lower end inner edge of the locking frame is moved below the locking projection. By doing so, the lower end of the locking frame moves on the release projection and separates from the surface of the side wall, and the fingertip is inserted into this separated part,
Since the cover can be removed by pulling up the cover while bending the locking frame outward with a fingertip, such a removing operation can be easily performed without requiring a jig.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), since the notch is provided in the upper plate portion, the locking frame can be largely displaced by a small pressing force, and it is possible to easily assemble and remove the cover. it can.

Even if the relative positions of the locking frame and the locking projection are deviated due to a dimensional error, if the upper frame above the locking frame is obliquely pressed to deform the locking frame, The locking frame can be locked to the stop projection.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lock structure of an assembly member according to an embodiment of the present invention.

FIG. 2 is a side view as seen from the direction of arrow A in FIG.

3A and 3B are cross-sectional views showing a method of assembling the assembling member of FIG. 1, where FIG. 3A is a state before assembly, FIGS. 3B and 3C are states during assembly, and FIG. Shows the states after assembly.

FIG. 4 is a perspective view showing a conventional example.

FIG. 5 is a side view showing a conventional example.

[Explanation of symbols]

 1 Protector (assembly parts) 3 Bottom wall 5 Side wall 7 Main body 9 Opening 11 Upper plate 13 Cover 15 Locking frame 19 Flat part of locking frame (lower end of locking frame) 19a Flatness of locking frame The upper surface of the installation portion (inner edge of the lower end of the locking frame) 23 Locking protrusion 30 Gap 33 Notch 37 Release protrusion

Claims (2)

[Claims] 1. An assembly part including a main body having a side wall portion erected from a bottom wall portion and a cover having an upper plate portion for closing the opening of the main body, and protruding downward at a side end of the cover. A flexible locking frame is provided, and a locking projection for locking the lower end inner edge of the locking frame is provided on the side wall portion of the main body in a protruding manner.
In a locking structure of an assembly component, wherein the locking frame is locked to the locking projection in a closed state in which the opening of the main body is closed by the upper plate part of the cover, the main body is located above the locking projection. A gap is provided at the upper end of the side wall of the main body of the main body, and a gap that allows downward movement of the locking frame in the closed state is provided. A release protrusion is provided to separate the inner edge of the lower end from the side wall portion, and the locking frame is displaced downward in an assembled state in which the engaging frame is engaged with the locking protrusion, and is further displaced downward from the assembled state. A lock structure for an assembly part, wherein a lower end is separated from the side wall portion by the release protrusion. 2. The lock structure for an assembling component according to claim 1, wherein the upper plate portion located above the gap in the assembled state is cut from roots on both sides of the locking frame. A lock structure for an assembling component, which is characterized in that a cutout portion that allows the locking frame to be displaced downward is provided.