JPH0616366Y2 - Lid opener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a lid opening / closing device in which a lid is attached to a case so as to rotate and open.

[Prior Art] Conventionally, in this type of device, as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 61-185095, a pair of support plates projectingly formed in a case are provided with opposed receiving holes. A pair of shafts projecting from the lid is rotatably supported in the receiving hole so that the lid is rotatably attached to the case. In this case, when the lid is mounted on the case, the shafts are press-fitted between the support plates to bend the support plates outward, and then the shafts and the receiving holes are aligned to restore the support plates. By doing so, the lid is pivotally attached to the case so as not to come off.

[Problems to be solved by the invention] However, in such a lid closing device, when the lid is attached to the case, the shaft portion is press-fitted between the support plates, so that an unreasonable force is applied to both sides and the portion is damaged. If the lid and case are made of synthetic resin, there is a risk of large cracks, and if you repeatedly open and close the lid in this state, this part will break and the lid will come off. There is a problem that it will end up.

Therefore, an object of the present invention is to provide a lid opening / closing device that can stably support and hold the lid on the case without applying an excessive force to the pivotally supporting portion of the lid when assembling the lid. .

[Means for Solving the Problems] According to the present invention, a pair of shafts is formed on one of a lid or a case, and a pair of cylinders is formed on the other, and the shafts are pivotally supported on the respective cylinders to form a lid. In a lid opening / closing device adapted to be openably and closably attached to a case, an outer peripheral wall of the one tubular portion is axially spaced from a bottom portion of the one tubular portion, and a tip end of the one axial portion is an axial line. A notch groove that can be inserted from the crossing direction is formed, and a spring that urges along the axial direction is arranged in the other cylindrical portion so that the tip of the one shaft portion is pivotally supported by the bottom side of the notch groove. Is.

[Operation] When the lid is assembled, the tip of one shaft is inserted into the notch groove from the axial crossing direction and pivotally supported on the bottom side of the one cylinder, so that unreasonable stress is applied to the pivot part. It is possible to prevent breakage of the pivotally supported portion, and the one pivotally supported shaft portion can be prevented from being disengaged from the notch groove by the biasing force of the spring.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show a case where the first embodiment of the present invention is applied to, for example, an automobile digital timepiece. In FIG. 1, 1 is a case made of, for example, synthetic resin and the front side is A time display unit 2 and a plurality of operation buttons 3 corresponding to respective items such as hours and minutes are provided so as to correct the display value of the time display unit 2 and change the display. It is arranged side by side with the time display portion 2 in a recessed portion 4 formed with a step on the front side of the case 1.

In addition, a pair of receiving plates 5 is formed in the recessed portion 4 below the operation button 3 by projection molding, and one and the other shafts projecting inward at the tip ends of the receiving plates 5, respectively. Part 6, 6A
Are provided so as to face each other in the axial direction. Reference numeral 7 denotes a lid that covers the front surface of the recessed portion 4. Cylindrical portions 8 and 8A are projectingly formed on the rear surface of the base end of the lid 7 in correspondence with the shaft portions 6 and 6A. , 8A each have a receiving hole 9 formed therein, and the outer peripheral wall of the one cylindrical portion 8 is axially spaced from a bottom wall 9A, which is the bottom of the receiving hole 9, and has one axial portion. The tip of 6 is provided with a notch groove 10 which can be inserted from the axial crossing direction. Further, a retaining protrusion 11 is formed at the tip of the other cylindrical portion 8A. Then, the end surface 11A of the protrusion 11 and the protrusion 11
Since a step is formed between the end surface 8B of the other tubular portion 8A having no edge, the step portion is tapered so that it is not caught by other parts. 12 is the other shaft portion 6
A coil spring wound around A and interposed between the other tubular portion 8A and the receiving plate 5, and when the lid 7 is assembled to the case 1 and the lid 7 is opened. Is for closing and for biasing the lid 7 along the axial direction.

Next, the assembly will be described.

A coil spring 12 is wound around the other shaft portion 6A formed in the case 1, and the other shaft portion 6A is wound through the coil spring 12.
Is inserted into the receiving hole 9 provided in the cylindrical portion 8A of the lid 7 and is pivotally supported,
Moreover, with the outer and inner ends of the coil spring 12 being locked to the case 1 and the lid 7, respectively, the lid 7 is moved in the axial direction against the biasing direction of the coil spring 12, that is, the second The shaft portion 6 is moved to the left side in the drawing, and the other shaft portion 6 is inserted into the notch groove 10 formed in the one cylinder portion 8 from the axial crossing direction, and when the coil spring 12 is returned thereafter, one shaft portion 6 is received. Bottom wall 9
It is pivotally supported on the A side and the assembling work of the lid 7 is completed.

Therefore, the coil spring 12 wound around the other shaft portion 6A is
Since the outer end and inner end are locked by the case 1 and the lid 7, respectively, a restoring force in the winding direction is accumulated, and even if the lid 7 is hooked with a finger or the like and the lid is opened, the lid 7 will be removed. Automatically closed,
A wrong operation of the operation button 3 inside the recessed portion 4 is prevented. Further, since the coil spring 12 is sandwiched between the receiving plate 5 and the cylindrical portion 8A, the lid 7 is pressed by the restoring force along the axial direction so that the tip of one shaft portion 6 is fixed to the bottom wall of the receiving hole 9. Since the shaft 7 is biased toward 9A, the tip of one shaft portion 6 does not slip out of the notch groove 10 and detach from the receiving hole 9 during the opening / closing operation of the lid 7, and the lid 7 can be opened and closed stably. .

Further, in this embodiment, a retaining protrusion 11 is provided at the tip of the other tubular portion 8A in order to perform a more stable opening / closing operation. This is the lid 7 at a predetermined angle, for example, the opening angle
When the lid 7 is moved against the biasing force of the coil spring 12 when the angle is 20 ° or more, the projection 11 comes into contact with the receiving plate 5 to restrict the movement of the lid 7, and the tip of one shaft portion 6 Is not allowed to move to a position where it can come out of the notch groove 10. However, when the opening angle of the lid 7 is within 20 °, the stopper protrusion
11 is different in the opening angle of the lid 7 from that in the above-mentioned state, the position with respect to the receiving plate 5 is also changed, and it does not abut the receiving plate 5, but instead the end face 8B of the lower cylindrical portion 8A is lowered. Since it comes into contact with the receiving plate 5, it is possible to move the tip end of the one shaft portion 6 to a position sufficient to come out of the notch groove 10.

From the above description, the effect of the present embodiment is that the lid 7 is biased along the axial direction by the coil spring 12 wound around the other shaft portion 6A, so that the tip of one shaft portion 6 is covered. One of the cylindrical portions 8 formed in FIG. 7 is pivoted toward the bottom wall 9A of the one cylindrical portion 8 and is prevented from slipping out from the notch groove 10 provided in the outer peripheral wall of the cylindrical portion 8. For the sake of completeness, the other cylindrical portion 8A is provided with a retaining projection 11 and the lid 7
The movement of the lid 7 along the axial direction is restricted by the difference in the opening angle of the lid 7, so that the tip of one of the shaft portions 6 cannot move to a position sufficient to come out of the notch groove 10 unless it is within a predetermined angle. It is a thing. In other words, if the lid 7 is within a predetermined angle, one shaft portion 6 can be easily inserted into the notch groove 10 and pivotally supported in the receiving hole 9. When assembling the lid 7, the shafts 6 and 6A and the tubular portions 8 and 8A can be prevented from being damaged without applying any unreasonable force, and the lid 7 is detached from the case 1 during the opening / closing operation. Can be operated without.

FIGS. 5 to 7 show a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and the detailed description thereof will be omitted.

In this embodiment, a pair of L-shaped shaft portions 13 and 13A forming the axial direction is provided on the lid 7 side, and a pair of cylinder portions 15 and 15A having a receiving hole 14 is provided on the case 1 side, and the one shaft portion 13 is provided. To the side of the flat surface 1
A protruding portion 17 having a tip 6 is formed in a protruding manner, and the one cylindrical portion 1
On the 5 side, a notch groove 18 is formed at an interval from the bottom wall 14A of the receiving hole 14 in the axial direction so that the protrusion 17 can be inserted in the axial crossing direction. Then, the other shaft portion 13A is inserted into the other cylindrical portion 15A via the coil spring 12 to pivotally support it, and the lid 7 is moved in the axial direction against the biasing force of the coil spring 12, that is, 6. Moving to the right in FIG. 6, the projecting portion 17 of the one shaft portion 13 is inserted into the notch groove 18 of the one cylinder portion 15 from the axial crossing direction so that the one shaft portion 13 is received by the cylinder portion 15. After being inserted into the hole 14, the coil spring 12 is returned to urge the one shaft portion 13 toward the bottom wall 14A, which is the bottom portion of the receiving hole 14, so as to be pivotally supported. Further, in this case, the flat surface 16 of the projecting portion 17 is set so as to be in a horizontal state when the lid 7 is opened at an opening angle θ of about 20 °, and in this state, the flat surface 16 is aligned with the cutout groove 18 and inserted. It will be possible. Therefore, with the lid 7 open at 20 °, the protruding portion 17 of one shaft portion 13 is inserted into the notch groove 18, the shaft portion 13 is pivotally supported in the receiving hole 14, and the coil spring 12 is used to By urging the shaft portion 13 toward the bottom wall 14A of the receiving hole 14, the same action and effect as those of the first embodiment can be obtained.

It should be noted that the present invention is not limited to the above-described embodiments, but various modifications can be made within the scope of the present invention, and the present invention has been shown to be applied to a vehicle digital timepiece. It is also applicable to a recorder or a storage case.

Further, not only the coil spring 12 but also a spring that urges along the axial direction can obtain the same effect.

[Effects of the Invention] The present invention forms a pair of shafts on one side of the lid or case and a pair of cylinders on the other side, and pivots the shafts on the respective cylinders to open and close the lid on the case. In the lid opening / closing device that is attached so as to be capable of being attached, the outer peripheral wall of the one tubular portion is axially spaced from the bottom of the one tubular portion, and the tip of the one axial portion is inserted from the axial crossing direction. A possible notch groove is formed, and a spring for urging along the axial direction is arranged in the other cylinder portion so that the tip of the one shaft portion is pivotally supported by the bottom side of the notch groove. During the assembly work of the lid, the force of the pivot of the lid is not applied, the damage of the pivot is suppressed, and the lid is stably supported to prevent accidental removal while opening and closing the lid. An opening / closing device for holding the lid can be provided.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention, FIG. 1 is an exploded perspective view, and FIG. 2 is a sectional view taken along the line AA when the lid is assembled in FIG. FIG. 3 is a sectional view taken along line BB of FIG.
4 is a sectional view taken along the line CC of FIG. 2, FIGS. 5 to 7 show a second embodiment of the present invention, and FIG. 5 is an exploded perspective view and FIG.
FIG. 7 is a longitudinal sectional view of a main part, and FIG. 7 is a sectional view taken along the line DD of FIG. 1 ... Case 6,13 ... One shaft 6A, 13A ... the other shaft 7 ... Lid 8,15 ... One cylinder 8A, 15A ... The other cylinder 9A, 14A ... Bottom Wall (bottom) 10,18 ...... Notch groove 12 ...... Coil spring (spring)

Claims (1)

[Scope of utility model registration request] 1. A pair of shafts is formed on one of a lid and a case, and a pair of cylinders is formed on the other, and the shafts are pivotally supported on the respective cylinders so that the lid can be attached to the case so as to be opened and closed. In the lid opening / closing device described above, the outer peripheral wall of the one cylindrical portion is provided with a notch groove which is axially spaced from the bottom portion of the cylindrical portion and in which the tip of the one shaft portion can be inserted in the axial crossing direction. And a spring for urging along the axial direction so that the tip of the one shaft portion is pivotally supported by the bottom side of the notch groove in the other tubular portion. .