JPH0331103Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a small electric appliance that is attached to a wall, such as a gas leak alarm or a door chime, so that the necessary length of the power cord can be taken out and the excess cord can be stored inside the main body. This invention relates to the back structure of a small electric appliance.

Conventionally, when installing this type of appliance, if the distance from the installation location to the outlet is short, the extra length of the cord cannot be stored inside the appliance itself, so it is either left slack or bundled in an appropriate place. This was extremely unsightly and caused damage to the cord itself.

The present invention proposes a simple structure for the back of a small electrical appliance that allows excess cord to be wound around the back of the appliance so that the cord leading to the outlet does not sag, and the required length of cord can be taken out.

Next, an embodiment of the present invention will be described below with reference to the drawings, taking a gas leak alarm as an example.

1 is a case body of a gas leak alarm, and a circular recess 3 is provided in the center of the back plate 2;
A guide groove 5 is formed from a position where the cord 4 is taken out from inside the main body 1 at a corner to a position in contact with the side of the recessed part 3, and above the recessed part 3 of the back plate 2, a guide groove 5 is formed. An elastic claw 6 is provided protrudingly adjacent to.

Reference numeral 7 denotes a cover plate attached to the back of the back plate 2, and the center part of the face of the cover plate 7 facing the back plate 2 has a vertically elongated cross section with a thickness approximately equal to the width of the cord 4, as shown in FIG. A substantially oval spacer 8 is integrally formed to protrude, and the spacer 8 is formed at an eccentric position slightly upwardly shifted from the center of the back plate 2, and the lower end of the spacer 8 is located at the center of the back plate 2. recessed part 3
A protrusion 9 that fits into the spacer 8 on the outer surface of the cover plate 7 is provided in the upper part, and an engagement hole 10 that engages with the elastic claw 6 that protrudes from the back plate 2 surface is provided. A recess 11 is formed at the corresponding location so that when the elastic pawl 6 engages with the engagement hole 10, the tip thereof faces into the recess 11. 1
Reference numeral 2 designates a protrusion protruding from the side surface of the spacer 8, and is provided closer to the side of the protrusion 9.

One or several notches 13 for pulling out the cord 4 are provided at the corners of the cover plate 7, and a vertically long hole 14 is provided above the spacer 8 to see the amount of winding of the cord 4. ing. Furthermore, the cover plate 7
Two recesses 15 are formed on the outer surface toward the left and right sides, and can be fitted into projections 17 of a mounting plate 16, which will be described later. A small hole 18 is opened.

The cord 4 is wound up in the following manner. First, the cord 4 pulled out from inside the main body 1 passes through the guide groove 5 of the back plate 2, and then the cover plate 7 is inserted between the protrusion 9 of the spacer 8 and the recess 3 at the center of the back plate 2, and the engagement hole 10. are attached to the back surface of the main body 1 by engaging with the elastic claws 6, respectively, and the cover plate 7 is fixed with a spacer 8 leaving a gap 19 approximately equal to the width of the cord 4 from the back plate 2. At this time, the projecting piece 12 of the spacer 8 presses down the cord 4 in the guide groove 5 so that it does not come off, and the cord 4 part escapes into the groove 5 and does not protrude into the gap 19. It wraps tightly around the . Note that the cord 4 may be wound around the spacer 8 before attaching the cover plate 7. In this case, the protrusion 12 will bite into the beginning of the winding of the cord 4, so that the cord 4 will not easily unravel. It can be prevented.

Reference numeral 16 denotes a bent mounting plate for attaching and fixing to a wall surface, and engagement pieces 20 bent inward are integrally provided on both left and right sides of the mounting plate 16. The main body 1 is engaged with the long grooves 22 of the rising portions 21 rising from both the left and right sides (see FIG. 5). The rising portion 21 is formed so that its upper surface is flush with the outer surface of the cover plate 7 when the cover plate 7 is attached to the back surface of the main body 1. Place the lid plate 7 on both sides of the mounting plate 16.
A protrusion 17 is formed at a corresponding location of the recess 15, and as shown in FIG. By pressing down, the protrusion 17 that is loosely fitted into the small hole 18 on the lower side of the recess 15 is forced into the recess 15, so that the main body 1 does not easily separate from the mounting plate 16. .

The peripheral corner of the back plate 2 is formed at the same height as the rising part 21, and the corner and the rising part 21 are separated from each other by some distance to form four drawer openings 23 for the cord 4 to the outside. There is. Note that the cover plate 7 does not rotate because the protrusion 9 of the spacer 8 and the engagement hole 10 fit into the recess 3 and the elastic claw 6, respectively, and are supported at these two locations relative to the main body 1. In addition, although it is not easy to separate, in the figure, in order to support the front case 1a of the main body 1, insertion holes are provided in the protrusion 9 of the spacer 8 and the recess 3 of the back plate 2, and the screws 2 are inserted.
4, it has a structure in which it is tightened and fixed to the cover plate 7.

The present invention is constructed as described above, and the spacer provided on the cover plate serves as a means for attaching the cover plate to the main body case, and the attachment is reliable and the cover plate can be easily attached and detached. The cord can be wrapped neatly in the gap between the cover plate and the back plate of the main body case, so when the distance from the installation position of the main unit to the outlet is short, the excess cord is stored inside the cover plate and looks good. Yes, there is no need to worry about damaging the cord. Moreover, since the spacer around which the cord is wrapped is located slightly above the center of the back plate of the main body, a space remains below the gap inside the back plate when the cord is wound, so that the cord remains in this area. The slack can be accommodated.

Further, according to the present invention, when the main body case is attached to the mounting plate, the protrusion provided on the mounting plate is configured to firmly fit into the recess of the cover plate, thereby making the mounting of the main body case even more secure. I can do it.

As described above, the present invention has various effects such as being able to easily store a long cord even in a small wall-mounted appliance such as a gas leak alarm, being easy to manufacture, and being provided at a low cost.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a perspective view of the cover plate, Figure 3 is a vertical cross-sectional view of the assembled state, Figure 4 is a partially cutaway rear view of the cord wrapped around it, and Figure 5 is the attachment of the mounting plate to the main body. FIG. 6 is a cross-sectional side view showing the relationship between the mounting plate and the lid plate. Code explanation, 1... Case body, 2... Back plate, 3
... recessed part, 4 ... power cord, 5 ... guide groove,
6...Elastic claw, 7...Lid plate, 8...Spacer,
9... Protrusion, 10... Engagement hole, 11... Recess,
12... Protruding piece, 13... Notch, 14... Long hole,
15... Recess, 16... Mounting plate, 17... Protrusion,
18... Small hole, 19... Gap, 20... Engaging piece,
21...Rising portion, 22...Long groove, 23...Drawer opening, 24...Screw.

Claims (1)

[Scope of Claim for Utility Model Registration] Consisting of a case body, a lid plate that is detachably attached to the back side of the case body, and a mounting plate that attaches and supports the case body, the back plate of the case body is provided with a recessed part. A guide groove is formed from the cord extraction position from the main body to the side of the recessed part, and a spacer with a thickness approximately equal to the width of the cord is formed protruding from the inner surface of the lid plate, and one end of the spacer is formed. is provided with a protrusion that fits into the concave portion of the back plate, and an engagement hole is provided at the other end to engage with an elastic claw protruding from a position close to the concave portion of the back plate. A protrusion is formed on the side surface of the spacer to protrude above the guide groove on the back plate of the case body when the cover plate is attached to the back side of the case body, and a recess is formed on the outer surface of the cover plate at a location opposite to the spacer. The elastic claw is formed so that its tip faces into the recess when the elastic claw engages with the engagement hole, and a corner of the cover plate is provided with a notch for pulling out the cord, and A recess is formed on the outer surface of the lid plate, and a small hole is formed on the lower side adjacent to the recess, and the mounting plate has an engagement plate that engages in a long groove provided in the back plate. A cord storage part is formed, and the inner surface of the mounting plate has a protrusion that can be loosely fitted into the small hole of the cover plate and can be firmly fitted into the recess on the upper side. The back part structure of a small electric appliance with.