JPS5847754Y2 - Lid opening/closing device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a lid opening/closing device that has a simple structure that allows the lid to be fixed in both the open and closed states, thereby preventing the lid from being opened or closed inadvertently when carrying the device. It is designed to prevent this.

FIG. 1 shows a conventionally used lid opening/closing device.

In FIG. 1, the cabinet 1 is formed with a storage section 5 consisting of a pair of side walls 2 and 3 facing each other, an inner wall 4 connecting the rear end, etc., and a shaft 6 is provided at the bottom of the opening of the storage section 5. , a retaining portion 7 is provided above.

On the other hand, 8 is a lid integrally formed of resin, and has a plurality of ribs 9 protruding from a position facing the axis 6 of the cabinet 1, and a lid 8 from a position facing the engaging part 7 of the cabinet I-1. An elastic locking piece 10 having an engaging claw 10a is formed.

Therefore, by press-fitting the plurality of ribs 9 of the lid 8 onto the shaft 6 and sandwiching the shaft 6 between the plurality of ribs 9, the lid 8 can be attached to the opening of the storage portion 5 so as to be openable and closable.

Then, the lid 8 is rotated in the direction of arrow C in FIG. , can be kept constant for one period with the lid 8 closed.

From this state, bend the elastic locking piece 10 with your finger in the direction of arrow C in FIG. The lid 8 can be opened by rotating it in the direction shown in FIG.

However, in this case, since the lid 8 is fixed in the closed state by the action of the elastic locking piece 10, the elastic locking piece 10 must be pressed each time in order to open from the closed state. First, this has the drawback that the operation of opening the lid 8 becomes cumbersome.

Furthermore, since the lid 8 is not fixed in any way when the lid 8 is open, if the device is laid down on its side with the lid 8 open in order to store parts such as batteries and cords in the storage section 5, the lid 8 will naturally This has the disadvantage that it closes, making it difficult to store parts, etc.

There are various types of lid opening/closing devices in use other than the one shown in Figure 1, but they all use elastic locking pieces or manually operated locking members.
Since this locking member only fixes the lid in the closed state, it is troublesome to open the lid from the closed state, and the lid may be closed inadvertently after it has been opened.
It has the same drawbacks as the one in FIG.

The present invention provides a lid opening/closing device that eliminates these conventional drawbacks.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.

In the figure, a storage section 14 is formed in the cabinet 11 by a pair of side walls 12.12 facing each other and an inner wall 13 connecting their rear ends, and the mutually facing surfaces of the side walls 12.12 are Bearings JL15, 15 are formed.

Further, a stepped portion 16 is formed around the opening.

On the other hand, 17 is a lid integrally formed of resin, and this lid 1
A pair of arm parts 18, 18 rising vertically from the back face are formed at both ends of the back face of 7, and a cylindrical shaft 19, 19 is provided outwardly protruding from each arm part 18, 18. 1
A portion of the outer periphery of each shaft 19, 19 is provided with a tapered protrusion 20, 20 that becomes lower toward the tip of each shaft 19, 19.

Further, a notch 21 is formed in the center of the upper end of the lid 17 into which a finger is inserted when opening and closing.

In the above configuration, if the shafts 19, 19 are rotatably inserted into the bearing holes 15, 15 of the cabinet 11, the lid 17 can be attached to the opening of the storage section 14 so as to be openable and closable.

The opening/closing operation of the lid 17 in this state will be explained with reference to FIGS. 3 to 5.

When the lid 17 is closed, as shown in Fig. 3 a, l),
A tapered protrusion 20 of the lid 17 is located slightly downward, and by contacting the inner wall 13, the lid 17 is
This prevents it from falling (that is, opening) in the direction of the arrow in Figure 3a.

Therefore, the lid 17 is fixed in a closed state.

From this state, when a finger is inserted into the notch 21 of the lid 17 and the lid 17 is opened as shown in FIGS. 4a and 4l, the projection 20 is pressed against the inner wall 13.

At this time, since the outer surface of the protrusion 20 is formed with a tapered surface, this tapered surface moves along the inner wall 13 as the lid 17 rotates, and in response to this movement, the arms 18 and 18 move inside each other. (in the direction of arrow E in Figure 3).

For this reason, when opening the lid 17, a resistance force acts to prevent the lid 17 from being opened, but if the lid 17 is further opened against this resistance force, the state shown in FIG. 5a will appear.

As shown in b, the protrusion 20 moves slightly upward, and in this state, the lid 17 is completely opened.

In this state, when the lid 17 is attempted to be opened in the direction of the arrow F in FIG. 5A, the state shown in FIGS.

Therefore, the lid 17 is fixed in the closed state shown in FIGS. 5a and 5l), and the lid 17 will not close naturally even when the device is laid down.

In addition, when closing the lid 17, it is sufficient to rotate the lid 17 in the direction of arrow F in FIG. 5a against the resistance force acting in the state shown in FIG. 4a, l).

Furthermore, if the lower edge of the lid 17 is brought into contact with the stepped portion 16 of the cabinet 11 when the lid 17 is opened, the lid 17 can be opened.
By appropriately setting the positional relationship between the lower edge of the lid 17 and the protrusion 20 in advance, when the lid 17 is opened, the
It can be fixed without wobbling.

Further, it is desirable that the protrusion 20 be provided at a position such that the periphery of the lid 17 is in close contact with the inside of the stepped portion 16 in the state shown in FIGS. 3a and 3l).

As described above, according to the present invention, the lid can be securely fixed in both the open state and the closed state, so that the lid can be prevented from being opened or closed inadvertently.

Moreover, instead of using an elastic locking piece or a manually operated locking member as in the past, the opening/closing operation of the lid is suppressed through interaction between the inner wall of the cabinet, a tapered protrusion, and a flexible arm. Since the lid is applied with force and this force substantially closes the lid and keeps it in the closed state, there is no need to release the locking member each time the lid is opened or closed.

Furthermore, since the lid, including the arms, shaft, and protrusions, can be integrally molded from resin, it is easy to manufacture, the number of parts is reduced, and assembly is easy.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing a conventional lid opening/closing device, Fig. 2 is an exploded perspective view showing an embodiment of the present invention, and Fig. 3a, Fig. 4a, and Fig. 5a explain its operation. Side sectional view for
FIG. 3, FIG. 4, and FIG. 5 are sectional views of the same plane. 11... Cabinet, 12... Side wall, 13... Inner wall, 14... Storage section, 1
5... Bearing hole, 17... Lid, 18...
... Arm part, 19 ... Axis, 20 ...
protrusion.

Claims (1)

[Scope of utility model registration request] A part of the cabinet is formed with a pair of side walls each having a bearing hole on each side facing each other, and an inner wall connecting the rear ends of these side walls. , a pair of arms rising approximately perpendicularly from the back surface of the lid, a cylindrical shaft protruding outward from each arm, and a part of the side surface of the shaft that becomes lower toward the tip of the shaft. The shaft of the lid is rotatably inserted into the bearing hole of the cabinet, and the tapered projection is pressed against the inner wall of the cabinet when the lid is opened and closed. The lid opening/closing device is configured such that the arm portions of the lid are bent inwardly to apply force to the lid in a direction to prevent the lid from opening and closing.