Lid switching device

Abstract: A switching device includes operating members (5) independently movably supported one each at the opposite lateral sides of a lid (1), spring means (8) having a pair of rotary shaft parts (8a) disposed on the inner side of the lid so as to advance or retreat under the influence of the resilient pressure of the spring means, and lock members (10) disposed on the opposite side edges of an opening of a box body (2) so as to detachably fasten the rotary shaft parts thereto. The rotary shaft parts (8a) are connected to the operating members (5) so as to urge the operating members outwardly away from each other by virtue of the resilient pressure of the spring means (8) and are removed from the lock members (10) by depressing motions of the operating members. Owing to the construction, the lid (1) is ensured to produce an infallible shut state on the box body (2) by bringing the rotary shaft parts (8a) accompanied by the resilient pressure of the spring means (8) into engagement with the lock members (10). It is enabled to produce an infallible open state in two directions by selectively removing the rotary shaft parts (8a) from the lock members (10) by the depression of the operating members (5).

Description: The present invention relates to a switching device capable of opening and shutting in two directions a lid on an automobile console box or any other lid (inclusive of a door) rotatably disposed on an opening of a box body. A device for opening and shutting the lid of an automobile console box in two directions has been already disclosed in Japanese Utility Model Public Disclosure No. 60-90042. The conventional switching device, though not illustrated herein specifically, comprises supporting shafts of a circular cross section disposed on each along the opposite sides of the edge of an opening of a box body and bearing parts of a C-shaped cross section suitable for detachable insertion therein of the supporting shafts disposed integrally on the sides of the edge of a lid opposite the supporting shafts and enables the lid to shut the opening of the box body by having the bearing parts rotatably inserted around the corresponding supporting shafts. The release of the lid from the opening of the box body is attained by removing one of the bearing parts from the corresponding supporting shaft and rotating the lid about the other supporting shaft as a fulcrum or inversely by removing the other bearing part from the corresponding supporting shaft and, this time, rotating the lid about the other supporting shaft as a fulcrum. Owing to this construction, the opening of the box body can be exposed in two directions. The conventional switching device allows the box body to be opened and shut selectively in two directions to suit the occasion and, therefore, offers very convenient use as compared with the classic switching device which allows the lid to be opened and shut only in one direction. The conventional switching device described above indeed has the advantage of enabling the box body to be opened and shut in two directions simply by adopting an extremely simple construction having supporting shafts of a circular cross section disposed on the box body side and bearing parts of a C-shaped cross section disposed on the lid side. In the actual use of this switching device, however, the simplified construction ironically produces an evil effect of entailing the following problem. In the conventional switching device, the side of the lid used for producing an opening or shutting motion requires the bearing part to be forcibly inserted around the supporting shaft or conversely requires the state of this insertion to be forcibly released, and the side of the lid used as the fulcrum for rotation suffers the bearing part to be immoderately rotated on the bearing part. Therefore, it has a serious problem that when the opening and shutting motions are frequently repeated, the C-shaped cross sections of the bearing parts are radially expanded or deformed and eventually prevented from allowing smooth opening and shutting motions or infallibly producing a perfectly open or shut state. A further known switching device is disclosed in FR-A-2 623 779. It shows a mechanism comprising a box body, a lid disposed rotatably on an opening of the box body, and a switching device for opening and shutting the lid about two different rotating axes and comprising a pair of operating members independently movably supported one each at opposite lateral sides of the lid. The preamble of the independent claim 1 is known from this document. The main object of the present invention is to provide a box body comprising a switching device which permits effective elimination of the problems encountered by conventional switching devices in opening and shutting a lid in two directions and, at the same time, warrants infallible opening and shutting of the lid with a click by making positive use of the resilient pressure of spring means. From one aspect of the present invention, there is provided a box body with a lid disposed rotatably on an opening of the box body and with a switching device for opening and shutting the lid about two different rotating axes, the switching device comprising a pair of operating members independently movably supported one each at opposite lateral sides of the lid, characterized in that the switching device further comprises spring means constituted of a resilient portion provided integrally with a pair of rotary shaft parts and being disposed on an inner side of the lid, so as to advance or retreat the rotary shaft parts under the influence of resilient pressure of said spring means, each rotary shaft part respectively defining a rotating axis and each rotary shaft part respectively being connected to one of said operating members so as to urge said operating members outwardly away from each other by virtue of the resilient pressure of said spring means, and a pair of lock members disposed respectively on opposite side edges of the box body, the said opposite side edges enclosing the opening of the box body and corresponding to said opposite lateral sides of the lid in the shutting state, so as to detachably fasten said rotary shaft parts thereto, each rotary shaft part being removable from said lock members by depressing motions of said operating members. The above and other objects, characteristic features and advantages of the present invention will become more apparent from the description to be given hereinbelow with reference to the accompanying drawings, in which:- Figure 1 is an exploded perspective view illustrating one embodiment of the lid switching device according to the present invention. Figure 2 is a cross section illustrating the state in which a lid is shut on a box body. Figure 3 is an enlarged cross section of the essential part illustrating the state in which a rotary shaft part of spring means is removed from a lock hole of a lock member. Figure 4 is an explanatory view illustrating the state in which the lid is opened in one direction. Figure 5 is an explanatory view illustrating the state in which the lid is opened in the opposite direction. Figure 6 is an enlarged cross section of the essential part illustrating another typical layout of the spring means. Now, the present invention will be described in detail below with reference to the illustrated embodiments. A switching device according to the present invention is constructed so as to open and shut in two directions a lid rotatably disposed on an automobile console box. To be specific, as illustrated in Figure 1, a lid 1 has a depressed part 3 formed on the inner side thereof. Two through holes 4 are bored in the two opposite ones of the four walls defining the depressed part 3. Two operating buttons 5 each provided with oblong hole parts 6 and stopper parts 7 are movably supported in the through holes 4. Rectangular spring means 8 made of a wire and provided integrally with a pair of opposed rotary shaft parts 8a and a pair of opposed resilient parts 8b is disposed in a bent state inside the depressed part 3. The pair of rotary shaft parts 8a forming the opposite sides of the rectangular spring means 8 and severally sheathed in collars 9 are idly inserted in and connected to the oblong hole parts 6 of the operating buttons 5. In this construction, the resilient pressure derived from the bend of the spring means 8 urges the operating buttons 5 outwardly inside the through holes 4 away from each other. However, the operating buttons 5 have their outwardly urged strokes restrained by the collision of their own stopper parts 7 against the inner surface of the opposite walls of the lid 1. In a box body 2, two pairs of lock members 10 each provided with a tapered guide part 11 and a lock hole part 12 of the shape of laid U are disposed upright on the opposite ones of the edges enclosing an opening of the box body 2 and located in an aligned relationship, so that the corresponding rotary shaft parts 8a of the spring means 8 are detachably brought into engagement with the lock hole parts 12 of the lock members 10 on the opposite sides. In the lid switching device of this construction, since the operating buttons 5 are supported movably inside the through hole 4 of the lid 1 and the rotary shaft parts 8a of the spring means 8 are idly inserted inside the corresponding oblong hole parts 6 of the operating buttons 5, the resilient parts 8b of the spring means are bent inwardly inside the depressed part 3 and consequently allowed to urge the operating buttons 5 outwardly until the strokes thereof are restrained by the stopper parts 7. When the lid 1 is laid to shut the opening of the box body 2 in the aforementioned state, the rotary shaft parts 8a of the rectangular spring means 8 are retreated while being guided by the tapered guide parts 11 of the corresponding lock members 10 and automatically brought into engagement with the lock hole parts 12 of the shape of laid U of the lock members 10. As a result, the lid assumes a shutting state on the box body 2 as illustrated in Figure 2. This shutting state is constantly retained infallibly because the pair of rotary shaft parts 8a located at the opposite sides of the spring means 8 are kept in resilient engagement with the corresponding lock hole parts 12 in consequence of the resilient pressure derived from the bend of the pair of resilient parts 8b. When the lid 1 is to be opened on the left side in the drawings, for example, the operating button 5 on the left side is depressed inwardly against the resilient pressure while being accompanied by the rotary shaft part 8a of the spring means 8 idly inserted in the oblong hole part 6 as illustrated in Figure 3, and the rotary shaft part 8a of the spring means 8 is easily removed from the lock hole part 12 of the lock member 10. Thereafter, the lid 1 can be opened infallibly on the left side by rotating the lid 1 upwardly about the rotary shaft part 8a of the spring means 8 kept in resilient engagement with the lock hole parts 12 of the lock members 10 on the right side as a fulcrum as illustrated in Figure 4. In the state consequently assumed, the rotary shaft part 8a on the right side is kept in secure engagement with the lock hole parts 12 of the corresponding lock members 10 while being accompanied by the resilient pressure, there is absolutely no possibility of this rotary shaft part 8a being accidentally dislocated from the lock hole parts 12. When the lid 1 opened on the left side as described above is to be shut, the lid 1 is rotated downwardly this time about the rotary shaft part 8a of the spring means 8 kept in engagement with the lock hole parts 12 of the lock members 10 on the right side. As a result, the rotary shaft part 8a of the spring means 8 collides against the tapered guide parts 11 of the lock members 10 on the left side and, by the action of the guide parts 11, automatically comes into engagement with the lock hole parts 12 of the lock members 10. Thus, the lid 1 assumes an infallibly shut state. When the lid 1 is to be opened conversely on the right side in the drawings, the operating button 5 this time on the right side is depressed inwardly against the resilient pressure while being accompanied by the rotary shaft part 8a of the spring means 8 idly inserted in the oblong hole parts 6, then the rotary shaft part 8a of the spring means 8 is easily removed from the lock hole parts 12 of the lock members 10. Thereafter, the lid 1 can be infallibly opened on the right side by rotating the lid 1 upwardly, as illustrated in Figure 5, about the rotary shaft part 8a of the spring means 8 which is kept in engagement with the lock hole parts 12 of the lock members 10 on the left side as a fulcrum. Again in this case, the lid 1 in the open state can be put to a shut state by rotating this lid 1 downwardly causing the rotary shaft part 8a of the spring means 8 to be automatically brought into engagement with the lock hole parts 12 of the lock members 10 by virtue of the action of the tapered guide parts 11 of the lock members 10. In this embodiment, as shown in Figure 2, an empty space 13 for allowing of a large bend of the resilient parts 8b of the spring means 8 is interposed between the resilient parts 8b of the rectangular spring means 8 and the bottom of the depressed part 3 of the lid 1 and the spring means 8 is disposed inside the depressed part 3 of the lid 1. When the lid 1 needs to be removed from the box body 2, this removal can be easily attained by simultaneously depressing the operating buttons 5 on the opposite sides inwardly and removing the opposite rotary shaft parts 8a of the spring means 8 together from the lock hole parts 12 of the lock members 10 by making positive use of the aforementioned empty space 13. Where the lid 1 needs not be removed from the box body 2, the lid switching device may be constructed so as to prevent the two rotary shaft parts 8a of the spring means 8 from being simultaneously removed from the lock hole parts 12 of the lock members 10 by disposing the resilient parts 8b of the spring means 8 contiguously to the bottom of the depressed part 3 of the lid 1, thereby restraining the amount of the bend of the resilient parts 8b inside the depressed part 3. Particularly in this case, the lid 1 can be expected to produce a shutting state with enhanced fastness because the strong resilient pressure of the spring means 8 can be positively utilised in the generation of the shutting force. Alternatively, the lid switching device may be constructed such that a small empty space is interposed between the resilient parts 8b of the spring means 8 and the bottom of the depressed part 3 so that inward depression of one of the operating buttons 5 allows the resilient parts 8b to be contiguous to the bottom of the depressed part 3 of the lid 1, but prevents the other operating button from being depressed inwardly. In the embodiments described above, the rotary shaft parts 8a destined to serve as the fulcrums of rotation of the lid 1 are integrally disposed on the opposite sides of the rectangular spring means 8 for the purpose of simplifying the overall construction of the device. It is, of course, possible to form the rotary shaft parts 8a and the resilient parts 8b independently of each other and assemble them into the rectangular spring means 8. Further, the embodiments have been applied to the lid of an automobile console box. Of course, the present invention needs not be limited to this particular application but may be easily embodied in a door of a refrigerator designed to be opened and shut in two directions and in various other lids and doors without reference to the designations to be adopted for the opening and shutting means. Owing to the adoption of the construction described above, the present invention enables a lid movably disposed on an opening of a box body to be opened and shut in two directions by making use of the resilient pressure of spring means and, therefore, warrants infallible production of opening and shutting motions and open and shut states at all times with a click. Even when the opening and shutting motions are frequently repeated, the possibility of the lid switching device, unlike the conventional countertype, ceasing to produce smooth opening and shutting motions and infallible open and shut states is completely eliminated. Since the lid switching device of the present invention is simplified in structure, it contributes to lowering the cost of equipment.

Claims: A box body (2) with a lid (1) disposed rotatably on an opening of the box body (2) and with a switching device for opening and shutting the lid (1) about two different rotating axes, the switching device comprising: a pair of operating members (5) independently movably supported one each at opposite lateral sides of the lid (1), characterized in that the switching device further comprises spring means (8) constituted of a resilient portion (8b) provided integrally with a pair of rotary shaft parts (8a) and being disposed on an inner side of the lid (1), so as to advance or retreat the rotary shaft parts (8a) under the influence of resilient pressure of said spring means (8), each rotary shaft part (8a) respectively defining a rotating axis and each rotary shaft part (8a) respectively being connected to one of said operating members (5) so as to urge said operating members (5) outwardly away from each other by virtue of the resilient pressure of said spring means (8); and a pair of lock members (10) disposed respectively on opposite side edges of the box body (2), the said opposite side edges enclosing the opening of the box body (2) and corresponding to said opposite lateral sides of the lid (1) in the shutting state, so as to detachably fasten said rotary shaft parts (8a) thereto; each rotary shaft part (8a) being removable from said lock members (10) by depressing motions of said operating members (5). The box body according to claim 1, wherein said resilient portion (8b) has a pair of resilient parts for forming a rectangular shape in conjunction with said pair of rotary shaft parts (8a). The box body according to claim 2, wherein said pair of resilient parts and a bottom of the inner side of the lid (1) have interposed therebetween an empty space (3) large enough to remove the lid (1) from the box body (2) when said operating members (5) are simultaneously depressed inwardly. The box body according to claim 2, wherein said pair of resilient parts are disposed contiguously to a bottom of the inner side of the lid (1), whereby said pair of rotary shaft parts (8a) are prevented from being detached simultaneously from said lock members (10). The box body according to claim 2, wherein said pair of resilient parts and a bottom of the inner side of the lid (1) have interposed therebetween an empty space (3) small enough to allow said pair of resilient parts to be contiguous to a bottom of the inner side of the lid (1) with inward depression of one of said pair of operating members (5) but prevent the other operating member from being depressed inwardly.

Inventors: YAMADA SATOSHI, YAMADA, SATOSHI
Applicants: KATO HATSUJO KAISHA LTD, KATO HATSUJO KAISHA LTD.
Application year: 1991
Main classification: E05D15
IPC codes: B60R7, A45C13, E05C21, E05D15