JPH0211171Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fixing device for an opening/closing cover in a small portable device such as a roll paper cover for a small portable printer.

[Prior Art] A conventional fixing device for a cover for opening and closing a small portable device will be described with reference to FIG. 1 is the upper box, 2 is the lower box,
3 is a synthetic resin opening/closing cover. Upper box inner wall 1a
A symmetrical circular cross-sectional shaft 3b is formed on the opening/closing cover side wall 3a by a semicircular notch hole 1b formed on the upper side and a semicircular notch hole 2b formed on the lower box inner wall 2a. supports the scissor shaft 3b from above and below. The opening/closing cover is opened/closed by rotating around the shaft 3b in the directions of arrows A and B. When the opening/closing cover is closed, a protrusion 3c at the tip of the opening/closing cover and a groove 1c in the upper box arranged to correspond to the protruding part 3c are engaged with each other so as to prevent the opening/closing cover from opening accidentally.

[Problem that the invention attempts to solve]

However, in the prior art described above, the opening/closing cover shaft 3
Since the hole supporting b is formed in the upper box part and the lower box part, the semicircle 1b and Since the circular hole shape formed by the semicircle 2b on the inner wall of the lower box is misaligned, the shaft 3b of the opening/closing cover may interfere with the hole, or the inner wall 1a of the opening/closing cover may interfere with the inner wall 1a of the upper box, the inner wall 2a of the lower box, and the side wall 3b of the opening/closing cover. There is a problem that the motors interfere with each other and do not rotate smoothly. Furthermore, during assembly, the opening/closing cover shaft 3b must be inserted between the semicircle 1b on the inner wall of the upper box and the semicircle 2b on the inner wall of the lower box to secure the upper and lower boxes, making assembly complicated. However, even after assembly, the opening/closing cover shaft 3b made of synthetic resin is susceptible to breakage at the base of the shaft due to impact such as dropping.

The present invention is intended to solve these problems.The purpose of this invention is to improve the operability when attaching and removing the opening/closing cover to the upper box, and also to make it easier to open/close by rotating the opening/closing cover after attachment. To provide a fixing device for an opening/closing cover of a small portable device that can be smoothly operated and prevents the opening/closing cover shaft from breaking.

[Means for solving problems]

The device for fixing the opening/closing cover of a small portable device according to the present invention includes an upper box 11 in which a recess is formed in a part, a lower box 12 that is engaged with the upper box 11, and a lower box 12 that is engaged with the upper box 11.
In the fixing device for the opening/closing cover of a small portable device, the upper box 11 has a pair of upper box inner walls 11a, 11a through which a non-circular hole 11b is formed. , an opening/closing cover receiving wall 11c connected to the pair of upper box inner walls 11a, 11a and having the recess formed therein and an engaging groove 11d formed therein; the wall 13d protrudingly provided with an engaging protrusion 13e that is engaged with the shaft 13b; and the shaft 13b that is engaged with the non-circular hole 11b and has an outer shape that is smaller than the dimension of the smallest part of the hole. has a pair of side walls 13a, 13a protruding outward, and a groove 13c is provided in the vicinity of the shaft 13b so that the shaft 13b can be elastically deformed.
The opening/closing cover 13 is characterized in that it can be opened and closed by rotating around the center.

〔Example〕

An embodiment of the present invention will be described based on FIG. 1
1 is an upper box in which a recess is formed in a part; 12
1 is a lower box that is engaged with the upper box 11, and 13 is an opening/closing cover that is attached to the recess of the upper box 11. When the pair of side walls 13a, 13a of the opening/closing cover are pushed with fingers from both sides, the pair of side walls 13a, 13a move into the shape of arrow E due to the action of the pair of grooves 13c, 13c provided through the pair of side walls 13a, 13a. By elastically deforming and bending in the direction (inward direction), the tips of the pair of symmetrical shafts 13b, 13b, which are formed to protrude outward from the pair of side walls 13a, 13a, are displaced inward. A pair of side walls 13a of the opening/closing cover,
A pair of shafts 13 while keeping 13a in a deformed state.
b, 13b, the tip width of the pair of upper box inner walls 11
The pair of non-circular holes 11b, 11b are made slightly narrower than the width dimensions of the holes 11b, 11a, and have a non-circular shape such as an ellipse formed in the pair of upper box inner walls 11a, 11a. The shaft 13 is formed with an outer diameter smaller than the dimension of the smallest part of the shaft 13.
When the opening/closing cover 13 is returned to its original state by inserting the shafts 13b and 13b, the pair of shafts 13b and 13b are securely fitted into the pair of holes 11b and 11b of the upper box 11. The opening/closing cover 13 is rotated about the shaft 13b in the directions of arrows F and G. Open/close cover 1
The engaging protrusion 13e provided on the front wall 13d of the upper box 11 is engaged with the engaging groove 11d formed on the opening/closing cover receiving wall 11c provided on the upper box 11. At that time, the opening/closing cover receiving wall 11c provided on the upper box 11
is elastically deformed in the direction of arrow H, making it easy to attach and detach with the toothed fitting. The lower box 12 is the upper box 11
It is possible to assemble the opening/closing cover 13 before or after attaching the opening/closing cover 13.

As the synthetic resin material for the opening/closing cover 13, a material that is easily elastically deformable, such as polycarbonate, is suitable. Also, if you use a transparent material, you can see what's inside from the outside.

[Effect of idea]

As described above, according to the present invention, by providing grooves in the pair of side walls of the opening/closing cover,
If an external force is applied to the pair of side walls, they will elastically deform very easily, so the distance between the tip surfaces of the pair of shafts protruding from the side walls can be easily made smaller than the distance between the inner walls of the pair of upper boxes. The operability when attaching and removing the opening/closing cover to and from the upper box is significantly improved, and the amount of deformation of the side wall of the opening/closing cover is also increased. The amount of biting interference with the engaging protrusion protrudingly provided on the front side wall of the connector is also increased, which has the effect of improving the biting condition.

Furthermore, since the non-circular hole into which the shaft is inserted is formed singly on the inner wall of the upper box, it is not formed by a combination of the upper box and the lower box as in the prior art. It also has the effect of solving the problem that the opening/closing cover does not rotate smoothly due to interference with the inserted shaft due to the change in the hole shape. Furthermore, the outer shape of the shaft to be inserted into the non-circular hole is smaller than the smallest part of the non-circular hole, and a groove is formed in the side wall of the opening/closing cover so that the side wall is elastically deformed. As a result, even if an external force is applied to the shaft, the external force is absorbed by the movement of the shaft or the deformation of the side wall, and the external force acting on the shaft can be significantly reduced, thereby preventing breakage of the shaft. It also has the effect of being preventive.

[Brief explanation of the drawing]

FIG. 1: A perspective view showing the conventional structure, FIG. 2: A perspective view showing the structure of the present invention, and FIG. 3: A side view showing the structure of the present invention. 11... Upper box, 11a... Upper box inner wall, 11b...
...hole, 11c...opening/closing cover receiving wall, 11d...engaging groove, 12...lower box, 13...opening/closing cover, 13
a...Side wall, 13b...Shaft, 13c...Groove, 13
d...front side wall, 13e...engaging protrusion.

Claims (1)

[Scope of utility model registration request] Opening/closing of a small portable device consisting of an upper box 11 in which a recess is formed in a part, a lower box 12 that is engaged with the upper box 11, and an opening/closing cover 13 that is attached to the recess of the upper box 11. In the cover fixing device,
The upper box 11 has a pair of upper box inner walls 11a, 11a through which a non-circular hole 11b is penetrated, and is connected to the pair of upper box inner walls 11a, 11a to form the recess and an engagement groove. The opening/closing cover 13 has an opening/closing cover receiving wall 11c in which a groove 11d is formed, and the opening/closing cover 13 has a wall 13d protrudingly provided with an engaging protrusion 13e that is engaged with the engaging groove 11d, and a non-circular shaped receiving wall 11c. A shaft 13 that is engaged with the hole 11b and has an outer diameter smaller than the dimension of the smallest part of the hole.
b protrudes outward, and has a pair of side walls 13a, 13a that are elastically deformable by having a groove 13c penetrated near the shaft 13b, and the opening/closing cover 13 is arranged around the shaft 13b. A fixing device for an opening/closing cover of a small portable device, characterized in that it can be rotated to open and close.