JPH0139459Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a case such as an attache case in which an opening/closing lid is hingedly connected to a box-shaped case body, and the opening/closing lid is locked in a predetermined opening state. The present invention relates to an improvement of a hinge-connected auxiliary arm to achieve the above.

<Prior Art> Conventionally, the hinge connection auxiliary arm of this type of case has one end of the first arm 5a pivotally attached to the inner surface of the side wall of the opening/closing lid 2, as shown in FIG. One end of the second arm 8a is pivotally connected to the end,
Furthermore, the other end of the second arm 8a is commonly used to be pivoted to the inner surface of the side wall of the case body 1.

A stopper 11 bent toward the second arm 8a side is connected to the extension of one end of the first arm 5a, and the stopper 11 is connected to the opening/closing lid 2 at a desired angle Θ1 (usually 90 degrees or more) with respect to the case body 1. When opened, the end of the stopper 11 comes into contact with the second arm 8a, and the angle Θ2 between the first arm 5a and the second arm 8 is
Open/close lid 2 under conditions that do not exceed 180 degrees.
The opening angle Θ1 is limited by this stopper 11.

〓Problems to be solved by the invention〓 However, the hinge-connected auxiliary arm of the above-mentioned conventional case does not allow the opening and closing of the lid 2 as shown by the two-dot chain line in Fig. 6.
is open to more than a right angle, that is, the angle Θ1 is
When opened to the final end of 90 degrees or more, the opening/closing lid 2 can be held in the open state, but if you release your hand from the opening/closing lid 2 when the opening/closing lid is opened at an angle less than 90 degrees, the opening/closing lid will close. 2 has the disadvantage that it either closes or opens under its own weight and cannot be kept open halfway. Specifically, the sixth
If the case body 1 is placed horizontally and the lid 2 is opened as shown in the figure, if the angle Θ1 is less than 90 degrees, the lid 2 will close under its own weight, so the user must hold the lid 2 with one hand. There is the inconvenience of having to use the other hand to take in and take out stored items.

Therefore, the present invention was made to solve the above-mentioned drawbacks, and its object is to provide a hinge-connected auxiliary arm for a case that can hold the opening/closing lid in any open position.

〓Means for solving the problem〓 In line with the above, the structure of the present invention, which is based on the above-mentioned claims for utility model registration, has a box-shaped case body 1 that can be opened and closed in order to solve the above-mentioned problem. Side wall 3 of the opening/closing lid 2 of the case 10 with the lid 2 connected by a hinge
A shaft 6 for pivotally supporting one end of the first arm 5 and a rotation stopper protrusion 22 of the first arm 5 are protruded from a fixed base plate 4 fixed to the inner surface, and the fixed base plate 4 includes: The steel balls 18, 18 which are urged in the projecting direction by the spring body 19 are housed so as to be retractable, and the base end edge of the first arm 5, which is pivotally supported by the shaft 6, has the rotary stopper therein. A notch 16 is provided in which the protrusion 22 is located, and the first arm 5
A plurality of approximately hemispherical locking recesses 15 into which the steel balls 18, 18 are inserted are provided at predetermined positions concentric with the shaft hole 13 on the back side of the base end edge of the shaft 6, and on the distal end side of the shaft 6. A spring 7 is disposed to press the first arm 5 toward the fixed substrate 4, and one end of a second arm 8 is pivotally attached to the tip of the first arm 5. A technical measure is taken in which the other end is pivotally attached to the inner surface of the side wall 9 of the case body 1.

<Operation> Therefore, in the hinge-connected auxiliary arm of the case of the present invention, when the opening/closing lid 2 is opened, the first arm 5 and the second arm 8 rotate as a link mechanism about their respective pivot shafts.

Since the fixed-side rotation stopper protrusion 22 is located within the notch 16, the first arm 5 can be rotated within the range where the rotation stopper protrusion 22 comes into contact with either end of the notch 16. In other words, the opening/closing range of the opening/closing lid 2 is limited to a predetermined range.

Furthermore, when the lid 2 is opened, the first arm 5 rotates about the shaft 6, and the steel ball 18 engages in the locking recess 15 at a predetermined rotation angle. The insertion of the steel ball 18 into the locking recess 15 can be felt as a slight resistance in the hand of the operator who is trying to open the opening/closing lid 2. When the opening/closing lid 2 is released, the frictional resistance between the first arm 5 and the fixed base plate 4 caused by the pressing force of the spring 7 and the steel ball 18 being engaged in the locking recess 15 cause the first opening/closing lid 2 to close. The force that locks the rotation of the arm 5 resists the force of the opening/closing lid 2 that attempts to rotate in the closing direction due to its own weight, and maintains the open state. Note that this steel ball 18 is urged into the locking recess 15 by a spring body 19, so if the opening/closing lid 2 is opened with a large force, this engagement will be disengaged and the opening/closing lid 2 will be opened further. It is something that can be done.

Embodiments Next, embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

In the figure, 10 is a case such as an attaché case,
This case 10 consists of a box-shaped case body 1 and an opening/closing lid 2 hingedly connected to the case body 1 using a conventionally known hinge, although not shown in the drawings.

A fixed base plate 4 is fixed to the inner surface of the side wall 3 of the opening/closing lid 2, and a shaft 6 for pivotally supporting one end of the first arm 5 and a rotation stopper protrusion 22 of the first arm 5 are attached to the fixed base plate 4. The first arm 5 is provided with a protruding structure, and steel balls 18, 18, which are biased in the protruding direction by a spring body 19, are retractably housed in the fixed base plate 4.
A shaft 6 for pivotally supporting one end is provided protrudingly.

The fixed base plate 4 is fixed by an appropriate method such as screwing or riveting, and a shaft 6 protruding from the fixed base plate 4 is fixed.
In the illustrated example, the plate is formed separately from the fixed substrate 4, and is implanted in the fixed substrate 4 and caulked or screwed in the final stage of assembly (before fixing the fixed substrate 4 to the side wall 3). However, a spring 7, a spring case 12, etc., which will be described later, may be fixed on the tip side of the shaft 6 (not shown). Of course it's a good thing to do. The steel ball 18 has an entry/exit hole drilled in the fixed base plate 4 and is biased in the projecting direction by a spring body 19 from the back side of the fixed base plate 4.

Further, a notch 16 in which the rotation stopper protrusion 22 is located is provided at the proximal edge of the first arm 5 that is pivotally supported by the shaft 6, and further, the first arm 5
A plurality of approximately hemispherical locking recesses 15 into which the steel balls 18, 18 are inserted are provided at predetermined positions concentric with the shaft hole 13 on the back side of the base end edge of the shaft.

The first arm 5 that is pivotally supported by the shaft 6 has a hole 13 at one end, and the shaft 6 may be inserted into the shaft hole 13. However, in this embodiment, the shaft 6 has a movable tube. A shaft 14 is arranged, and the movable cylinder shaft 14 is inserted through the shaft hole 13.

Further, the locking recess 15 is arranged at a predetermined angle on a circle concentric with the shaft hole 13, and the steel ball 18 is engaged depending on the rotational position of the first arm 5, so that the first arm 5 remains constant. It is designed to be elastically locked at each rotation angle. In addition, the cutout portion 16
As shown in FIG. 4, the rotation range of the first arm 5 is limited to the range until both ends thereof come into contact with a rotation stopper protrusion 22 protruding from the fixed base plate 4.

A spring 7 is provided on the tip side of the shaft 6 to press the first arm 5 toward the fixed base plate 4.
are arranged. This spring 7 has a spring case 12 fixed to the tip of the shaft 6 (on the right side in FIG. 3).
The top wall of this spring case 12 and the first arm 5
A spring 7 is housed between the two.

Further, one end of a second arm 8 is pivotally connected to the tip of the first arm 5, and the other end of the second arm 8 is pivotally connected to the inner surface of the side wall 9 of the case body 1.

In addition, in this application, the fixing board 4 is fixed to the opening/closing lid 2 side, but fixing to the case body 1 side is not excluded. However, in actual implementation, the storage space can be used more effectively if the fixed board 4 is placed on the opening/closing lid 2 side, and the first
As shown in the figure, if a partition storage section 20 for storing small items is arranged inside the opening/closing lid 2, the fixed board 4 to the spring case 12 will be inconspicuous and will be virtually invisible to the stored items. This is desirable because it can be done without causing any hindrance.

Effects of the invention In the present invention, as described above, a spring 7 is disposed at the pivot portion of the first arm 5, and the spring 7 presses the first arm 5 against the fixed base plate 4, which is a fixed part. Therefore, when opening the opening/closing lid 2, friction generated by the pressing force of the spring 7 is added to the rotation of the first arm 5, and the opening/closing lid 2 is moved in the middle of opening.
The opening/closing lid 2 can be held at its opening angle even if the hand is removed, and when the opening/closing lid 2 is opened at a predetermined angle, the steel ball 18 is engaged in the locking recess 15. Therefore, it is possible to provide a case hinge connection auxiliary arm that can more reliably maintain the rotational position of the opening/closing lid.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a case using the present invention, Fig. 2 is a plan view of the hinge-connected auxiliary arm of the case of the present invention, Fig. 3 is an enlarged sectional view taken along the line A-A, and Fig. 4 is a diagram of the fixed board. Plan view, FIG. 5 is a plan view of the first arm,
FIG. 6 is a side view of a case using a conventional example. DESCRIPTION OF SYMBOLS 1... Case body, 2... Opening/closing lid, 3... Side wall, 4... Fixed board, 5... First arm, 6...
Shaft, 7...Spring, 8...Second arm, 9...
...Side wall, 10...Case, 13...Shaft hole, 15...
... Locking recess, 16 ... Notch, 18 ... Steel ball, 1
9... Spring body, 22... Rotating stopper projection.

Claims (1)

[Claims for Utility Model Registration] One end of the first arm 5 is attached to a fixed substrate 4 fixed to the inner surface of the side wall 3 of the opening/closing lid 2 of a case 10 in which an opening/closing lid 2 is hingedly connected to a box-shaped case body 1. A pivot shaft 6 and a rotation stopper protrusion 22 of the first arm 5 are provided in a protruding manner, and the fixed base plate 4 is provided with a steel ball 1 biased in the protruding direction by a spring body 19.
8 and 18 in a retractable manner, and a notch 16 is provided at the proximal edge of the first arm 5, which is pivotally supported on the shaft 6, in which the rotation stopper protrusion 22 is located. First arm 5
A plurality of approximately hemispherical locking recesses 15 into which the steel balls 18, 18 are inserted are provided at predetermined positions concentric with the shaft hole 13 on the back side of the base end edge of the shaft 6, and on the distal end side of the shaft 6. A spring 7 is disposed to press the first arm 5 toward the fixed substrate 4, and one end of a second arm 8 is pivotally attached to the tip of the first arm 5. A case hinge connection auxiliary arm whose other end is pivotally connected to the inner surface of the side wall 9 of the case body 1.