JPH0240714Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a hinge used for furniture, etc., in particular, for elastically holding both mounting plates in the unfolded state and in the closed state. This relates to a hinge using a leaf spring.

(Prior Art and its Problems) In a conventional hinge of this type, both ends of a leaf spring curved into an arc are pivotally connected to a pair of mounting plates on the hinge. In such a conventional hinge, if the leaf spring is sized to maintain a curved state that can efficiently bias both mounting plates in the opening direction when both mounting plates are unfolded at 180 degrees, When the mounting plate is moved to close, the leaf spring is pinched by both the mounting plates, and it is impossible to close the mounting plates to a state where they are parallel to each other and face each other. In order to make this possible, large notches must be provided in both mounting plates into which the leaf springs fit loosely, which reduces the strength and makes it impossible to use the hinges as furniture hinges.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and its feature is that the pair of mounting plates can be closed from the ends on the pivot side. A bearing portion is provided protruding from the side, and both mounting plates are pivotally connected to be able to open and close via both bearing portions and a support shaft, and the closing movement side near the pivoting side end of both mounting plates is A leaf spring pivot shaft parallel to the support shaft is installed at a lower position than the support shaft, and both of these leaf spring pivot shafts are bent into a substantially triangular shape so that both adjacent ends can be opened against elasticity. The two ends of the leaf spring are pivotally connected to each other.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

Reference numerals 1 and 2 denote mounting plates, which are provided with mounting screw holes 3 and 4, respectively. As shown in FIG. 5, a cylindrical bearing portion 5 is provided at the pivot side end of one of the mounting plates 1, excluding both ends in the width direction, protruding toward the closing side. At the pivot side end, a cylindrical bearing part 6 having a smaller diameter than the bearing part 5 is provided at both ends in the width direction excluding the part corresponding to the bearing part 5.
a and 6b are provided protrudingly on the closing side. A support shaft 7 is inserted through the bearings 6a, 5, and 6b, and is fixed to at least one of the bearings 6a, 6b. 8 is interposed. Furthermore, plastic washers 9 are interposed between both ends of the bearing portion 5 and the bearing portions 6a, 6b.

Reference numerals 10 and 11 are leaf spring pivot shafts installed on both the mounting plates 1 and 2, and a pair of bearing pieces 12 and 12 are respectively cut and raised toward the closing side near the ends of the mounting plates 1 and 2 on the pivot side. 13, it is supported at a position parallel to the support shaft 7 and lower than the support shaft 7. Reference numeral 14 is a leaf spring, and both legs 1 are closer to each other than the bottom portion 14a.
4b and 14c are long, and the portion corresponding to the bottom 14
a is bent into a concave isosceles triangle, and cylindrical parts 14d and 14e formed at the free ends of both leg parts 14b and 14c are connected to the leaf spring pivot shafts 10 and 11.
It is supported with a loose fit.

Note that the leaf spring pivot shafts 10 and 11 are attached to the bearing piece 1.
2 and 13, and in order to loosely fit and pivotally support the leaf spring cylindrical parts 14d and 14e at both ends of the projection, the leaf spring cylindrical parts 14d and 14
A notch portion is formed in e to allow the bearing pieces 12 and 13 to loosely fit therein. Said leaf spring pivot shaft 10,1
1 can be fixed by an appropriate method such as caulking so as not to rotate relative to the plate spring cylindrical parts 14d and 14e. Spring cylindrical portion 14d,
14e can also be configured to be rotatable relative to the pivot shafts 10, 11.

In the hinge configured as described above, when both the mounting plates 1 and 2 are opened at 180 degrees as shown in FIGS. 1 and 3, the distance between the leaf spring pivot shafts 10 and 11 is the maximum Therefore, both legs 14b and 14c of the leaf spring 14 are opened against the elasticity, and the return elastic force is applied to the pivot shafts of both leaf springs at an intermediate position between the support shaft 7 and the mounting plates 1 and 2. It acts in the direction of bringing 10 and 11 closer together. For this reason, both mounting plates 12
Since a biasing force 15 in the opening direction is applied around the support shaft 7, both mounting plates 1 and 2 are held at the opening restriction position.

The hinge held in the unfolded state can close both the mounting plates 1 and 2 about the support shaft 7 against the biasing force 15 in the opening direction of the leaf spring 14. At this time, when the imaginary line connecting both leaf spring pivot shafts 10 and 11 crosses the support shaft 7 from the side where the mounting plates 1 and 2 are located to the opposite side, both legs 14 of the leaf spring 14
The return elastic force acting on b and 14c acts in the direction of closing both mounting plates 1 and 2 around the support shaft 7. That is, the opening biasing force 15 of the leaf spring 14 is switched to the closing biasing force 16 as shown in FIG. 4, and both mounting plates 1 and 2 are automatically closed by the closing biasing force 16. and is held in the closed movement limited position. FIG. 4 shows the state immediately before reaching the closing movement limit position, that is, the state where both mounting plates 12
shows a state in which they are parallel to each other and facing each other. In the illustrated structure, the position where both the mounting plates 1 and 2 come into contact with both ends of the portion 14a corresponding to the bottom of the leaf spring is the closing movement restriction position.

(Operations and Effects of the Invention) As is clear from the above embodiments, according to the hinge of the present invention, the pair of mounting plates can be elastically held in the expanded state and the closed state by the leaf springs. In addition, opening and closing can be performed automatically by biasing both mounting plates in the opening direction or the closing direction with respect to the neutral point. In addition, the leaf springs used are not curved in an arc shape as in the past, but are bent in a triangular shape, so the bottom part is a narrow space between the two mounting plates in the closed state facing each other parallel to each other. Even though the width fits within the space, both legs are given a necessary and sufficient length, so that even when both mounting plates are in the expanded state, both mounting plates are efficiently biased in the opening direction by both legs of the leaf spring. You can.

In other words, the leaf spring pivot shaft is located at a relatively distant position from the support shafts for both mounting plates, and the degree of deformation of the leaf spring while both mounting plates open from the closed state to the unfolded state is measured. It is possible to increase the size of the mounting plate and to securely and strongly hold both mounting plates in the closed state and the unfolded state. Of course, there is no need to provide notches in both mounting plates into which the leaf springs fit loosely, and a hinge with no problem in strength can be obtained.

[Brief explanation of the drawing]

Figure 1 is a front view of the unfolded state, Figure 2 is a side view of the same, Figure 3 is a plan view of the same, Figure 4 is a cross-sectional plan view of the closed state, and Figure 5 is a longitudinal cross-sectional front view of both mounting plates. It is a diagram. 1, 2... Mounting plate, 3, 4... Screw hole for mounting, 5, 6a, 6b... Cylindrical bearing part, 7...
... Support shaft, 10, 11 ... Leaf spring pivot shaft, 12, 1
3... Bearing piece, 14... Leaf spring, 15... Biasing force in the opening direction, 16... Biasing force in the closing direction.

Claims (1)

[Scope of utility model registration request] A bearing part is provided protruding from the pivoting side end of the pair of mounting plates toward the closing side, and both mounting plates are pivotally connected to be able to open and close via both bearing parts and a support shaft. On the closing side near the receiving end, leaf spring pivot shafts parallel to the support shafts are installed at positions lower than the support shafts, and on both of these leaf spring pivot shafts,
A hinge formed by pivotally connecting both ends of a leaf spring which is bent into a substantially triangular shape so that the adjacent ends can be opened against elasticity.