JPH0217496Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a door opening/closing mechanism implemented in a control box of a television set, etc.

Conventionally, the door and the main body to which the door is attached are made of synthetic resin, and at the same time, the door pivot member is integrally molded with the door or main body, reducing the number of component parts, simplifying assembly, and reducing costs. It is being done.

As shown in FIGS. 1 and 5, the opening/closing mechanism of this type of door has a pivot 21 on the main body 1 side via a support piece 2.
21, a shaft hole 41 into which the shaft 21 fits is formed on the door 3 side, and the shaft 21 is forcibly inserted using the elasticity of the resin.
1 is fitted into the shaft hole 41.

As shown in Fig. 6, when the door 3 is fully opened, the load W on the door 3 itself is divided into a component V perpendicular to the door 3 and a component H parallel to the door. 1 and the pivot side tip of the door 3 hits the support piece 2 on the main body 1 side, so that the load on the pivot shaft 21 can be avoided.

However, the parallel component H acting on the door, that is, the load on the free end side of the door, acts directly on the pivot 21, and if the door is opened a little roughly, the pivot or the vicinity of the axis, which is made of resin and has a weak point, will There was a problem with the door being easily damaged and losing its function.

The technical problem to be solved by the present invention is to prevent damage to the pivot portion of the door by providing means for supporting the load on the free end side of the door.

In order to solve the above technical problem, the present invention has a receiving part and an engaging part that engage each other in the door's fully open position and support the load toward the free end of the door near the pivot parts of the door and the main body. It has been established.

When the door is opened, the receiving part and the engaging part engage, and the load on the free end side of the door does not act on the pivot, which prevents damage to the pivot, that is, the pivot part, and prevents damage to the pivot part. Even if it is formed integrally with the door and main body from synthetic resin, the weak point in strength can be compensated for.

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 shows a box main body 1 which is incorporated into the front surface of a television cabinet and accommodates various adjustment knobs, and a door 3 which is pivoted to the main body 1 so that it can be opened and closed downward.

Both the main body 1 and the door 3 are formed by injection molding of synthetic resin.

The main body 1 has a rectangular opening at the front, and a plurality of through holes 12, 12 from which adjustment knobs (not shown) are exposed at the bottom surface 11.

Support stands 13, 13 are provided on both sides of the lower end of the bottom surface 11.
is formed in a raised manner, and a support piece 2 is provided protruding forward from both support stands 13,13.

Pivot shafts 21 are provided at the lower end of each support piece 2 to project inwardly from each other.

A stepped portion 22 recessed toward the support stand 13 is formed on the lower edge of the supporting pieces 2, 2, and a pivot 2 of the stepped portion 22 is formed.
The first side contact portion 23a becomes a receiving portion 23 that engages with a locking piece 43 of the door 3, which will be described later.

Reference numeral 14 is a punch hole in a mold for forming the pivot 21, and is opened on the support base 13.

The door 3 is provided with protruding wall pieces 4, 4 parallel to the rotation surface of the door 3 near both ends on the side of the pivot part, and the wall pieces 4 are provided with wall pieces 4 that extend over the back surface 31 of the door 3 and that are attached to the pivot shaft 21 of the main body 1. A shaft hole 41 is provided in which the shaft hole 41 is rotatably fitted.

A round-bottomed groove 44 is formed in the back surface 31 of the door 3, which is continuous with the shaft hole 41 and communicates outward and with the side edge of the door.

The outer surfaces of the respective wall pieces 4 are inclined inward toward each other on the outer end side of the door 3 to form a guide surface 42 for the pivot shaft 21 .

The distance between the tips of the guide surfaces 42, 42 is equal to the distance between the tips of the guide surfaces 42, 42.
This is slightly larger than the distance between the tips of Nos. 1 and 21.

A locking piece 4 that engages and disengages from the receiving portion 23 of the main body 1 at the intersection between the outer end of the guide surface 42 and the back surface 31 of the door 3
3 is installed protrudingly.

Therefore, one pivot 21 of the main body 1 and the shaft hole 41 of the door 3 are fitted, and the inclined guide surface 42 on the other shaft hole side of the door is applied to the other pivot of the door 3, and the door 3 is forcibly closed. Press it toward the main body 1 side. Due to the elastic deformation of the pivot shaft 21 and the wall piece 4, the pivot shaft 21 moves along the inclined guide surface 42 and fits into the shaft hole 41 and the round bottom groove 44.

When the pivot 21 is fitted into the shaft hole 41, the pivot 21 and the wall piece 4 return to their original shapes, and the door 3 will not fall off from the main body 1.

When the door 3 is fully opened, the surface 3 of the door 3 will open as shown in Figure 3.
2 hits the opening edge 10 of the main body 1 and the locking piece 43 on the door 3 is connected to the stepped part 22 of the support piece 2 of the main body 1 and the receiving part 2
3. An engagement position P between the locking piece 43 and the receiving portion 23 is close to a line L connecting the free end of the door and the pivot 21.

As a result, the opening edge 10 of the door receives the component V of the load W on the door 3 that acts perpendicularly to the door 3, and the corresponding lever force is received by the stepped portion 22 of the support piece 2.
In addition, the component H acting in parallel to the door 3 is supported by the receiving portion 23 of the support piece 2 that is engaged with the locking piece 43 of the door 3,
As a result, even if the door 3 is opened roughly, no excessive force is applied to the pivot 21, and damage to the pivot 21 or the vicinity of the pivot can be prevented.

FIG. 4 shows another embodiment, in which a shaft hole 41a is formed in the main body 1 and a pivot 21a is formed in the door 3, and a receiving portion 23 is formed in the side wall 15 of the main body 1, and the receiving portion 23 is engaged with the door 3. A locking piece 43 is provided protrudingly.

When the door 3 is opened, the receiving part 23 and the locking piece 4 are
3 engages to support the rotational direction of the door 3 and the force applied to the free end side, which is effective in preventing damage to the door pivot portion.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the main body and door, Figure 2 is a perspective view of the main part, Figure 3 is a sectional view of the pivot part, Figure 4 is a sectional view of another embodiment, and Figure 5 is a conventional example. The oblique view and FIG. 6 are cross-sectional views of the conventional example. 21... Pivot, 23... Receiving portion, 43... Locking piece.

Claims (1)

[Scope of utility model registration request] For a pivot 21 protruding from either the rotating door or the main body that pivots the door, a shaft hole 41 into which the pivot fits freely is provided on the other side, and the door 3 and the main body 11 have The pivot 2 corresponds to the fully open position of
A door provided with a locking piece 43 and a receiving part 23 that engage with each other at a position other than the pivot 21 near the door 1 and support the force applied to the free end side of the door 3 parallel to the plate surface of the door 3. opening/closing mechanism.