JPH06164162A - Lock structure of cover - Google Patents

Abstract

PURPOSE:To permit a hook part to surely and firmly engage with a lock part without being influenced by a formation difference or a mounting difference or abrasion due to long-term use. CONSTITUTION:When a cover case 4 turnably mounted on a machine case 3 by a two-shaft hinge is closed on the machine case 3 and a hook 7 provided at the front edge of the cover case 4 is locked by a locking recessed part 6 provided at the front edge of the machine case 3, an elastic pressing piece 10 extended diagonally to the bottom at the rear edge of the machine case 3 elastically presses the inner plane at the rear edge of the cover case 4 to the rear, the cover case 4 is energized in the same direction and the hook 7 is permitted to be locked in the locking recessed part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid locking structure for a small electronic device such as a calculator or an electronic notebook.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a small electronic device such as an electronic notebook has a battery 1 inside and a key input section 2 and a liquid crystal display section (not shown) on the upper surface. A lid case 4 for protecting the key input section 2 and the liquid crystal display section is arranged on the case 3, and the lid case 4 and the device case 3 can be rotated by a biaxial hinge 5 at a rear end portion (left end portion in the figure). It has a structure attached to. The biaxial hinge 5 means that both lower ends of a strip-shaped hinge main body 5a are rotatably attached to the device case 3 by the first shafts 5b, and both upper upper ends of the hinge main body 5a are attached to the lid case 4 by the second shaft 5c. It is rotatably attached. As a result, the device case 3 and the lid case 4 are separated from each other by the first and second shafts 5.
It is rotatably connected around b and 5c. In this small electronic device, the front end of the device case 3 (right end surface in the figure)
Is provided with a locking recess 6, and a hook portion 7 that is removably engaged with the locking recess 6 is integrally provided at the front end of the lid case 4, and the lid case 4 is closed on the device case 3. At this time, the hook portion 7 of the lid case 4 is locked in the locking recess 6 of the device case 3 so that the lid case 4 is prevented from being opened by itself. In this case, the hook portion 7 is provided with a flexible thin portion 8 at the front end portion of the lid case 4, and is provided in a protruding shape from the thin portion 8 toward the inside.

[0003]

However, in the locking structure of the lid case 4 as described above, the lid case 4 is formed by the molding error of the hook portion 7 or the biaxial hinge 5 which occurs when the lid case 4 is molded. 3, the hook portion 7 is loosely engaged with the locking recess 6 due to an attachment error of the lid case 4 caused when the lid case 4 is attached, or the hook portion 7 is worn due to long-term use. There is a problem that it becomes impossible to lock. The present invention has been made in view of the above circumstances, and its object is to ensure that the hook portion does not loosen in the locking portion without being affected by molding error, mounting error, or wear due to long-term use. It is to provide a locking structure of a lid body that can be engaged with.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a lid body rotatably attached to a device case by a biaxial hinge so as to be closed on the device case.
When the hook portion provided on the front end portion of the lid body is locked by the engagement portion provided on the front end portion of the device case, the lid body is elastically pressed rearward to form the hook portion. An elastic member is provided to keep the engagement with the locking portion without loosening.

[0005]

According to the present invention, when the lid body is rotated around the biaxial hinge to close it on the equipment case and the hook portion of the lid body is engaged with the engagement portion of the equipment case, the elastic member is actuated. Since the lid body is elastically pressed rearward, the lid body is urged in the same direction, and accordingly, the hook portion bites into the locking portion, whereby the hook portion and the locking portion are separated from each other. It will be engaged without loosening.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The same parts as those in the conventional example of FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. In this small electronic device, the device case 3 and the lid case 4 are rotatably connected by a biaxial hinge 5 on the rear end face thereof, and the locking recess 6 is formed at the front end of the device case 3 as in the conventional case.
However, a hook portion 7 that engages with the locking recess 6 is provided at the front end of the lid case 4. Then, the rear end surface on the device case 3 in which the lid case 4 is arranged (the left end portion in FIG. 1)
The elastic pressing piece 10 is integrally formed on the base plate. The elastic pressing piece 10 extends obliquely downward from the upper part of the rear end surface of the device case 3, and a projection 11 is provided at the lower end thereof, and the projection 11 is the inner surface of the rear end of the lid case 4. By making elastic contact with the lid case 4 to the rear (biaxial hinge 5
It is structured so that it is pressed toward the side).

In the locking structure of the lid case 4 in such a small electronic device, the lid case 4 rotates around the biaxial hinge 5 and is closed on the device case 3, and the hook portion 7 of the lid case 4 is closed. Is locked in the locking recess 6 of the device case 3, the elastic pressing piece 10 elastically presses the lid case 4 rearward, so that the lid case 4 is biased in the same direction, and As a result, the hook portion 7 bites into the locking recess 6. Therefore, even if a molding error, a mounting error, or a wear due to long-term use occurs as in the conventional case, the hook portion 7 can be securely engaged with the locking recess 6 without being loosened by them. it can.

Next, referring to FIG. 2, the second embodiment of the present invention will be described.
An example will be described. Also in this case, the same parts as those in the conventional example of FIG. In this small electronic device, the elastic pressing piece 20 is integrally formed on the inner surface of the rear end portion (the inner surface of the left end portion in FIG. 2) of the lid case 4 arranged on the device case 3. This elastic pressing piece 2
0 extends obliquely downward from the upper part of the inner surface of the rear end of the lid case 4, and a protrusion 21 is provided at the lower end thereof, and the protrusion 21 elastically contacts the rear end surface of the device case 3, The lid case 4 is structured to be pressed rearward (toward the biaxial hinge 5).

In the locking structure of the lid case 4 in such a small electronic device, the biaxial hinge 5 is used as in the first embodiment.
When the lid case 4 is rotated around the center and is closed on the device case 3, and the hook portion 7 of the lid case 4 is locked in the locking recess 6 of the device case 3, the elastic pressing piece 20 moves the device case. When the lid case 4 is elastically contacted with the rear end surface, the reaction force urges the lid case 4 rearward, and accordingly, the hook portion 7 bites into the locking concave portion 6, and therefore the hook portion It is possible to securely engage the locking recess 7 with the locking recess 6.

Further, referring to FIG. 3, the third aspect of the present invention is described.
An example will be described. Also in this case, the same parts as those in the conventional example of FIG. In this small electronic device, the elastic pressing piece 30 is integrally formed on the inner side surface (the right side surface in FIG. 3) of the hinge main body 5a of the biaxial hinge 5 that is rotatably connected to the device case 3 and the lid case 4. . The elastic pressing piece 30 extends substantially horizontally from the inner surface of the hinge body 5a toward the rear end surface of the device case 3, and the tip end portion thereof elastically contacts the rear end portion of the device case 3 so that the hinge body 5a of the hinge body 5a can be secured. The lid body 4 is pushed rearward (counterclockwise in FIG. 3) around the first shaft 5b to push the lid case 4 backward (on the biaxial hinge 5 side).
It has a structure to urge to.

In the locking structure of the lid case 4 in such a small electronic device, the biaxial hinge 5 is used as in the first embodiment.
When the lid case 4 is pivoted around and is closed on the device case 3 and the hook portion 7 of the lid case 4 is locked in the locking recess 6 of the device case 3, the elastic pressing piece 30 moves the device case. 3 is elastically contacted with the rear end of the hinge main body 5a and pressed so as to rotate the hinge main body 5a rearward about the first shaft 5b of the hinge main body 5a. Accordingly, the lid case 4 is biased in the same direction. Then, the hook portion 7 bites into the locking recess 6,
Therefore, the hook portion 7 can be securely engaged with the locking recess 6 without loosening.

The present invention is not limited to the above-described embodiments, but is, for example, between the rear end surface of the equipment case 3 and the inner surface of the rear end portion of the lid case 4, or the rear end surface of the equipment case 3 and the biaxial hinge 5. An elastic member such as a coil spring or an action rubber may be arranged between the hinge body 5a and the hinge body 5a.

[0013]

As described above, according to the present invention, the lid is rotated around the biaxial hinge to close it on the equipment case, and the hook portion of the lid engages with the locking portion of the equipment case. When stopped, the elastic member elastically presses the lid toward the rear, so that the lid is biased in the same direction, and the hook portion can bite into the locking portion accordingly. Therefore, even if a molding error, a mounting error, or the like caused by conventional use occurs, or the wear occurs due to long-term use, the hook portion can be reliably engaged with the locking portion without being loosened.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view in which a part of a small electronic device showing a first embodiment of the present invention is omitted.

FIG. 2 is an enlarged cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of an essential part showing a third embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view in which a part of a small electronic device showing a conventional example is omitted.

[Explanation of symbols]

 3 Equipment case 4 Lid case 5 Biaxial hinge 6 Locking recess 7 Hook part 10, 20, 30 Elastic pressing piece

Claims (2)

[Claims] 1. A locking portion provided at a front end portion of an equipment case and a front end portion of a lid body rotatably attached to the equipment case by a biaxial hinge so that the lid body is provided with the lid body. In a locking structure of a lid including a hook portion that is removably locked to the locking portion when closed, the lid body is closed on the device case, and the hook portion is An elastic member for elastically pressing the lid body rearward to keep the engagement between the hook portion and the locking portion without loosening when locked to the locking portion is provided. Features a locking structure for the lid. 2. The lid member according to claim 1, wherein the elastic member is an elastic pressing piece integrally formed with either the device case, the lid member or the biaxial hinge. Locking structure.