JPH0592377U - Resin spring hinge and case using resin spring hinge - Google Patents

Abstract

(57) [Abstract] [Purpose] The number of parts of the spring hinge is reduced to simplify the manufacturing process, and in the case where the spring hinge is attached, the shaft etc. is prevented from protruding to the outside of the case to achieve harmony. Produce a sense of unity. [Structure] With a groove portion 3 formed in the central portion in the longitudinal direction,
The upper side surface 1a and the lower side surface 1b are freely bendable in the thin portion 3, and projections 5a to 5d are formed on the front surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spring hinge used in a case in which a lid is openable and closable with respect to a main body, and a case using this spring hinge, and more particularly to a spring hinge made of a resin flat plate and a case using the same.

[0002]

[Prior Art]

 As a hinge used for the case of ornaments, etc., as shown in Japanese Utility Model Publication No. Sho 42-7529, a metal flat plate composed of upper and lower halves is wound on a pin at each one end face, and the upper and lower metal is A spring hinge is used that is configured by locking an arc-shaped leaf spring on a flat plate. This spring hinge fits the upper and lower metal flat plates into the recesses formed in the main body and the lid body that form the case, and urges the lid body in the opening direction and the closing direction with respect to the main body.

[0003]

[Problems to be solved by the device]

 However, since the above-mentioned conventional spring hinge is constructed by using a metal flat plate as a material, a pin around which two metal flat plates are wound and four parts of an arc-shaped plate spring are required, and the press After punching a metal flat plate into a predetermined shape by working, bending and assembling steps are required, which causes a problem of poor productivity. Further, since the material is poor in flexibility, it is difficult to insert it into other parts, which also causes a problem that workability is deteriorated. Furthermore, when mounted on the case, there is a winding part around the pin in the center part, which exposes to the outside of the case, which damages the appearance of the case, and it is not easy to color and is also susceptible to corrosion. Therefore, there has been a problem that the aesthetic appearance is remarkably spoiled by the use over time.

An object of the present invention is to improve productivity by reducing the number of parts, facilitate fitting work with other parts, and prevent the winding part from protruding to the outside of the case. Moreover, it is an object of the present invention to provide a case using a resin spring hinge and a resin spring hinge, which are easily colored, are resistant to corrosion, and have an excellent appearance that can withstand long-term use.

[0005]

[Means for Solving the Problems]

 The resin spring hinge of this invention forms a groove in the center of the front surface of a resin flat plate in the longitudinal direction to form a bendable thin wall portion, and two opposing protrusions sandwiching the thin wall portion in the center of the back surface. And the surfaces of the two protrusions that face each other are inclined surfaces that abut against each other so as to define the bending angle of the thin portion, and one or both of the front surface and the back surface is provided. Wedge-shaped protrusions whose protrusion amount increases from the end face toward the central portion are provided on both sides of the groove portion, and arc-shaped leaf springs having both end portions locked on two end faces parallel to the groove portion are provided. Characterize

Further, the case using the resin spring hinge of the present invention is divided into upper and lower halves, and one side of each of the upper member and the lower member has a resin spring hinge according to claim 1. Each of both sides of the groove is formed with a recess that fits in from the side end face, and a hole is formed on the inner surface of the recess where the protrusion fits in a direction orthogonal to the direction in which the resin spring hinge fits into the recess. It is characterized in that the end face of the side face provided with the recess is chamfered at the same angle as the inclined face.

[0007]

[Action]

 The resin spring hinge of the present invention is made to be bendable at a thin portion formed by a groove formed in the central portion in the longitudinal direction, and arc-shaped plates are provided on the respective two side end faces parallel to the thin portion. Both ends of the spring are locked. Therefore, the elastic force of the arc-shaped leaf spring acts on the side surfaces located on both sides of the groove to urge it in the bending direction. The bending angle of this thin portion is defined to be a constant angle by the contact of the two projecting portions formed on the opposite surface of the groove portion with the inclined surfaces. Further, a protrusion is formed on one or both of the front surface and the back surface, and the protrusion has a wedge shape in which the amount of protrusion increases from the side end surface toward the central portion.

On the other hand, in the case where this resin spring hinge is used, one side of each of the upper member and the lower member, which are divided into upper and lower parts, is provided on each side of the groove portion of the resin spring hinge. Is formed with a recess into which the protrusion is formed, and a hole into which the protrusion formed on the resin spring hinge is fitted is formed on the inner surface of the recess. The protrusion of the resin spring hinge fits into this hole in a direction orthogonal to the direction in which the resin spring hinge fits into the recess.

Since the resin spring hinge is fitted into the recess from the side end face thereof, when the resin blade hinge is completely fitted in the recess, the wedge-shaped projection fits in the hole, and the protrusion amount of the projection is reduced. The largest part contacts the upper surface of the hole, and the resin spring hinge does not come off from the case.

Further, in the case, the end face of the side surface into which the resin spring hinge is fitted is chamfered at the same angle as the inclined surface of the projecting portion formed on the resin spring hinge. The inclined surface of the part is flush with the chamfered part.

[0011]

【Example】

 FIG. 1 is a front view, a rear view, a side view and a side sectional view showing an example of a resin spring hinge which is an embodiment of the present invention. The resin spring hinge 1 is formed of a resin in a substantially flat plate shape, and is divided into an upper side surface 1a and a lower side surface 1b by a groove portion 2 formed in the center of the front surface in the longitudinal direction. As is apparent from the side view of FIG. 1C and the side sectional view of FIG. 3D, the groove portion 2 has a V-shape, and the thin portion 3 is formed at the center thereof. There is. In the thin portion 3, the upper side surface 1a and the lower side surface 1b are flexibly connected. That is, the upper side surface 1a and the lower side surface 1b are rotatable with respect to each other around the thin portion 3. As is apparent from the rear view shown in FIG. 1B, two protrusions 4a, 4b are formed on the rear surface of the resin spring hinge 1 with the thin portion 3 interposed therebetween. The side surfaces 14a, 14b of the protruding portions 4a, 4b facing each other are inclined, and the bending angles when the upper side surface 1a and the lower side surface 1b are bent in the back direction are the same as those of the protruding portions 4a, 4b. It is defined by the contact of the inclined surfaces 14a and 14b. That is, the upper side surfaces 1a and 1b can be bent in the back direction within the range in which the inclined surfaces 14a and 14b contact each other.

Stepped portions 7 a and 7 b are formed at the central portions of the side end surfaces parallel to the groove portion 2 on each of the upper side surface 1 a and the lower side surface 1 b. Both ends 6a and 6b of an arc-shaped leaf spring 6 are locked to the stepped portions 7a and 7b, respectively. Further, as is apparent from the front view shown in FIG. 3A, protrusions 5a to 5d are formed on both sides of the stepped portions 7a and 7b. The protrusions 5a to 5d have a wedge shape in which the amount of protrusion increases from the side end face toward the central portion.

As described above, since the resin spring hinge 1 according to this embodiment is constituted by two points, that is, a flat plate portion formed by resin molding and a metal arc-shaped leaf spring, The number of points can be reduced and the manufacturing process can be extremely simplified. In addition, since it is made of resin, it is relatively easy to color and has excellent corrosion resistance, so its appearance does not deteriorate even after long-term use. Furthermore, since the upper side surface 1a and the lower side surface 1b that fit into a part of the case are made of a relatively flexible resin, the fitting operation can be performed easily.

FIG. 2 is a front view, a rear view, a side view and a side sectional view showing a resin spring hinge according to another embodiment of the present invention. As shown in FIG. 2, wedge-shaped protrusions 5a to 5d may be formed on the back side of the upper side surface 1a and the lower side surface 1b. Further, the protrusions 5a to 5d can be formed on both the front side and the back side.

FIG. 3 is an external view of a main part of a case in which a resin spring hinge according to an embodiment of the present invention is used. The case 21 is composed of a lower member 21a shown in the same figure and an upper member (not shown) which is formed substantially the same as the lower member 21a. On one side surface 26 of the lower member 21a, a recess 22 that is open on the upper surface is formed. Notches 23 and 24 are formed on the inner surface of the recess 22. In the notches 23 and 24, the recess 22 communicates with the inside of the lower member 21a. The outer end surface of the side surface 26 is a chamfered inclined surface 25.

The lower side surface 1b of the resin spring hinge 1 described above is fitted into the recess 22 of the lower member 21a from above. At this time, the leaf spring 6 projecting from the front surface of the resin spring hinge 1 is located in the notch 23 in the recess 22 and does not interfere with the inner surface of the recess 22. Further, the width of the recess 22 is made substantially equal to the plate thickness of the resin spring hinge 1.

FIG. 4 is a side sectional view of an essential part showing a state in which the resin spring hinge of the present invention is attached to the case. When the lower side surface 1b of the resin spring hinge 1 is fitted into the concave portion 22 formed in the lower member 21a of the case 21 from above, the wedge-shaped projections 5c and 5d protruding toward the front side of the lower side surface 1b and the concave portion 22 are formed. The inner side surface is elastically deformed and the projections 5c and 5d reach the cutout portion 24 and are fitted therein. At this time, the upper side surfaces of the protrusions 5c and 5d come into contact with the lower side surface of the notch 24, and the resin spring hinge 1 cannot move upward in the recess 22.

When the upper side surface 1a of the resin spring hinge 1 is fitted into the upper side member 21b of the case 21 from the lower side, the projections 5a and 5b are similarly fitted into the notches 24 formed in the upper side member 21b. To do. As a result, the resin spring hinge 1 cannot be separated from the lower member 21a and the upper member 21b of the case 21, and the lower member 21a and the upper member 21b are joined by the resin spring hinge 1. At this time, the leaf spring 6 provided in the resin spring hinge 1 is located in the notch 23 and does not interfere with other portions of the lower members 21a and 21b of the case 21. In addition, the inclined surfaces 14a and 14b of the two protrusions 4a and 4b formed on the back surface of the resin spring hinge 1 are provided with the inclined surfaces 25 formed on the end surfaces of the upper member 21b and the lower member 21a. Become one At this time, the resin used as the material of the resin spring hinge 1 is made to have the same appearance color as that of the case 21, so that the resin spring hinge 1 harmoniously matches the appearance of the case 21. Such coloring of the resin spring hinge 1 can be performed extremely easily as compared with the metal spring hinge.

When the resin spring hinge 1 is attached to the case 21 in this way, the upper member 21b of the case 21 is moved to the central portion of the resin spring hinge 1 with respect to the lower member 21a as shown in FIG. It can be opened and closed centering around. The opening angle of the upper member 21b with respect to the lower member 21a is determined by the inclination angles of the inclined surfaces 14a, 14b and the inclined surface 25. That is, the upper member 21b can be opened to a position where the inclined surface 25 of the upper member 21b and the inclined surface 25 of the lower member 21a come into contact with each other. Like the conventional metal spring hinge, the resin spring hinge 1 attaches the upper member 21b in the closing direction until the opening angle of the upper member 21b reaches a predetermined angle by the elastic force of the arc-shaped leaf spring 6. When the opening angle of the upper member 21b exceeds a certain angle, the upper member 21b is reversed to urge the upper member 21b in the opening direction.

When the resin spring hinge 1 (see FIG. 2) in which the protrusions 5a to 5d are formed on the back surface of the resin flat plate is used, as shown in FIG. 5, the recesses 2 2 of the upper members 21a and 21b are used. A hole 27 is formed on the back side inside. As a result, the protrusions 5a to 5d formed on the back surface of the resin spring hinge 1 fit into the holes 27, and the resin spring hinge 1 cannot be removed from the case 21.

[0021]

[Effect of the device]

 According to the resin spring hinge of the present invention, the upper side surface and the lower side surface, which are fitted into the upper member and the lower member of the case, respectively, can be formed integrally with each other by using a resin flat plate so as to be bendable with respect to each other. However, there is an advantage that the assembly work can be facilitated by reducing the number of parts. Further, by forming the wedge-shaped projection, it is possible to reliably prevent the resin spring hinge from coming off from this member after being fitted into the member such as the case.

Further, according to the case using the resin spring hinge of the present invention, since the protrusion of the resin spring hinge fits into the hole formed in the recess, the resin spring hinge can be securely attached. You can In this case, both ends are flush because the end face is chamfered so that it is flush with the inclined surface of the protrusion formed on the back surface of the resin spring hinge. There is an advantage that the rotating hinge part of the spring hinge does not protrude to the outside of the case after mounting, and a harmonious feeling of unity can be given to the appearance of the case.

[Brief description of drawings]

FIG. 1 is a front view, a rear view, a side view and a side sectional view of a resin spring hinge that is an embodiment of the present invention.

FIG. 2 is a front view, a rear view, a side view and a side sectional view of a resin spring hinge according to another embodiment of the present invention.

FIG. 3 is an external view showing a part of a case using a resin spring hinge according to an embodiment of the present invention.

FIG. 4 is a side sectional view showing a configuration of a main part of a case using the resin spring hinge.

FIG. 5 is a side sectional view showing a configuration of a case using a resin spring hinge according to another embodiment of the present invention.

[Explanation of symbols]

 1-resin spring hinge 2-groove part 3-thin part 4a, 4b-protruding part 5a-5d-projection 6-leaf spring 14a, 14b-inclined surface 21-case 21a-lower member 21b-upper member 22-recess 24 -Notch 27-Hole

Claims (2)

[Scope of utility model registration request] 1. A resin flat plate is formed with a groove in the center of the front surface in the longitudinal direction to form a bendable thin-walled portion, and two protruding portions facing each other with the thin-walled portion sandwiched are formed in the center of the back surface.
The surfaces of each of the two protrusions that face each other are inclined surfaces that come into contact with each other so as to define the bending angle of the thin portion, and either or both of the front surface and the back surface are moved from the side end surface toward the central portion. A resin spring hinge, characterized in that wedge-shaped protrusions that increase the amount of protrusion are provided on both sides of the groove portion, and arc-shaped leaf springs having both ends locked on two end surfaces parallel to the groove portion. 2. A recess which is divided into upper and lower parts and in which one side of each of the upper member and the lower member is fitted into each side of the groove of the resin spring hinge according to claim 1 from the side end surface. And the inner surface of the recess is provided with a hole into which the protrusion fits in a direction orthogonal to the direction in which the resin spring hinge is inserted into the recess, and the end face of the side surface where the recess is formed is the same as the inclined surface. A case using a resin spring hinge characterized by being chamfered at the angle.