JPH0545735Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hinge structure in which a first member and a second member are connected via a hinge member that utilizes the flexibility of the material.

[Prior Art] This type of hinge structure is mainly integrally molded from synthetic resin and is used in various fields.

FIG. 14 shows a synthetic resin hinge structure 10 applied to support a printed circuit board (hereinafter referred to as PCB). The hinge structure 10 is provided between two PCBs 12, with a first portion 14 attached to the upper PCB 12 and a second portion 16 attached to the lower PCB 12. The first portion 14 and the second portion 16 are integrally formed with the hinge portion 1.
They are connected via 8.

By the way, as shown in FIG. 15, in the hinge structure 10, since the flexible portion 18A of the hinge portion 18 has a width, the rotation of the first portion 14 that is rotated relative to the second portion 16 is prevented. The center becomes difficult to settle into position, especially if the hinge portion 18 is softened by the phenomenon of whitening due to repeated rotations.

Therefore, for example, when the upper PCB 12 is rotated, the end of the PCB 12 comes into contact with the chassis 20 on the side, causing a problem that the rotation is stopped midway.

Note that the end of the upper PCB 12 is restrained by the PCB support 22, and is prevented from being released by the elasticity of the hinge portion 18. Also, this PCB support 22 is the upper PCB 12
It also prevents wobbling in the horizontal direction (Fig. 14).

[Problems to be Solved by the Invention] In view of the above, the present invention provides a hinge structure in which a first member and a second member are connected via a hinge member that utilizes the flexibility of the material. It is an object of the present invention to be able to accurately guide relative rotation of a first member to a member within at least a predetermined range.

[Means for solving the problem] The hinge structure according to the present invention includes a first member and a second member.
A hinge structure in which a hinge portion that connects members in a relatively rotatable manner is configured by utilizing the flexibility of the first member and the second member, the hinge structure having an arcuate sliding surface formed on the first member. a guide recess, and a guide surface formed on the second member and sliding on the sliding surface of the guide recess without separating from the sliding surface of the guide recess while the second member rotates about the hinge part, and the second member has a guide surface that slides without separating from the sliding surface of the guide recess; a guide convex portion that guides the second member without causing the second member; a first engagement means provided at a widthwise end on the back side of the sliding surface of the guide concavity; and a guide surface of the guide convex portion. After the guide convex portion is inserted into the guide recess provided at the widthwise end of the tip, the guide convex portion is fitted into the first engaging means, and the first member and the second member are engaged with each other.
and second engagement means for fixing the member.

[Function] In the above configuration, when the guide convex portion of the second member is inserted into the guide concave portion of the first member, the sliding surface of the guide concave portion and the guide surface of the guide convex portion slide without being separated. Since the second member rotates, there is no deviation in the rotation locus within the range of relative rotation. In this way, when the guide convex part of the second member is inserted and fitted into the guide concave part of the first member, the first engaging means provided in the guide concave part and the first engaging means provided in the guide convex part are engaged with each other. The two engaging means fit together, and the first member and the second member are fixed.

[Example] Figs. 1 to 9 show an example of a hinge structure according to the present invention, and this example has a so-called double hinge structure.

Although the hinge structure shown in this embodiment can be used in any posture, in the following explanation, for convenience, the names of each part are shown based on the illustrated posture.

The hinge structure 24 according to this embodiment is integrally molded from synthetic resin, and includes a block portion 26 and a first
The plate section 28, the second plate section 30, the first hinge section 32 that connects the block section 26 and the first plate section 28, and the second hinge that connects the first plate section 28 and the second plate section 30. 34 as the main part. First plate part 2
8 is the first member with respect to the block portion 26 forming the second member.
The second plate part 30 forms a first member with respect to the block part 26 and the first plate 28 which form the second member.

The first hinge part 32 is formed by making the connection part between the block part 26 and the first plate part 28 thin, and has a first rotation center A and a second rotation center B as shown in FIG. When the first plate part 28 is rotated 180 degrees in the direction of arrow C with respect to the block part 26, it has two rotation centers A,
B is matched. The second hinge portion 34 is configured in the same manner, and the second plate portion 30 is connected to the first plate portion 2.
8, it is rotated 180 degrees in the direction of arrow D, and both rotation centers A and B are aligned.

The block portion 26 includes a square horizontal wall portion 36, a pair of vertical wall portions 38 that are bent at right angles from both ends of the horizontal wall portion 36, and a pair of vertical wall portions 38 that are continuous to the widthwise central portion of the pair of vertical wall portions 38 and are connected to the horizontal wall portion 36. A central wall 40 that is also continuous with the mold 36, a first plate guide recess 42 formed on one side separated by the central wall 40, and a first plate guide recess 42 formed on the other side separated by the central wall 40. A base 46 is constituted by the second plate guide recess 44 .

The first plate guide recess 42 includes a circular arc wall section 52 that is continuous with the pair of vertical walls 38 and the center wall section 40, and a partially arc wall section that is continuous with one of the vertical wall sections 38 and the center wall section 40. It is formed by a space surrounded by the portion 54 and the central wall portion 40. The arcuate wall portion 52 is located at the first rotation center A of the first hinge portion 32.
It is provided with a circular arc wall 52A whose bending center is . Further, the partially arcuate wall portion 54 also includes an arcuate wall 54A having the first rotation center A as the center of curvature. Although the side wall 52B of the arc wall portion 52 is flush with the side wall 38A of the vertical wall portion 38, a portion of the side wall 52B of the arc wall portion 54 is flush with the side wall 38A of the vertical wall portion 38.
4B is located at a lower level than the side wall 38A and is connected to the side wall 3.
It is continuous with 8A in a stepwise manner.

In addition, the first plate guide recess 42 has an engagement convex having a substantially semicircular cross section that is continuous with the arcuate wall 52, the partially arcuate wall 54, and the center wall 40, and slightly protrudes from the center wall 40. A portion 56 is formed (see FIG. 6). Furthermore, in the first plate guide recess 42,
Engagement convex portion 56, arcuate wall portion 52, and partially arcuate wall portion 54
A locking recess 58 is formed, the bottom of which is a central wall thinner portion 40A that is thinner than other portions.

The second plate guide recess 44 has basically the same shape as the first plate guide recess 42, and the fourth plate guide recess 44 has the same shape as the first plate guide recess 42.
As shown in the figure, an arcuate wall portion 60, a partially arcuate wall portion 62, an engaging protrusion 64, and a locking recess 66 are formed. The second plate guide recess 44 is different from the first plate guide recess 42 in that each arc wall 60 of the arc wall 60 and the partially arc wall 62
A, 62A has the first rotation center A of the second hinge part 34 as the center of curvature in the state shown in FIG. This is what is being done.

The first plate portion 28 is formed with a first plate portion guide convex portion 70 protruding from the base plate portion 68 in the shape of an arcuate wall so as to correspond to the first plate portion guide recess portion 42 . The first plate guide convex portion 70 includes
Side wall portion 7 continuous to one side wall and substrate portion 68
4 is formed. First plate guide convex portion 7
0 is an outer arcuate wall 70A and an inner arcuate wall 70B whose center of curvature is the second rotation center B of the first hinge portion 32.
It is equipped with The radius of curvature and width of the outer arcuate wall 70A and the inner arcuate wall 70B are made equal to those of the arcuate wall 52A and the arcuate wall 54A of the first plate guide recess 42, respectively. The thickness dimension of the side wall portion 74 is the step dimension E (second
(see figure). The outer wall of the side wall portion 74 is flush with the side wall 68A of the substrate portion 68.

The first plate guide convex portion 70 includes a side wall portion 74.
An engagement recess 76 is formed by cutting out the side wall on the side wall opposite to the side wall in which the side wall is continuous, and a hemispherical locking protrusion 78 is formed projecting from the side wall. . The engaging convex portion 76 and the locking convex portion 78 are in the state shown in FIG. 9B, in which the first plate portion 28 is rotated 180 degrees in the direction of arrow C from the state shown in FIGS. 1 and 9A. , corresponding to the engagement protrusion 56 and the locking recess 58 of the first plate guide recess 42, respectively.

As shown in FIG. 2, the substrate portion 68 of the first plate portion 28 has a notch 8 in the side wall opposite to the side wall 68A where the outer wall of the side wall portion 74 is flush with the outer wall.
0 is formed. The cutout portion 80 has a cutout depth F1 of a deeply cutout portion equal to the width of the arcuate wall portion 60. Further, the notch depth F2 of the shallowly notched portion is made equal to the step size between the side wall 62B of the partially arcuate wall portion 62 and the side wall 38A of the vertical wall portion 38. The width of the notch 80 and the first
The position of the plate portion 28 is such that when the first plate portion 28 is rotated as shown in FIG. 9B, the inner wall 80A is substantially flush with the arc wall 60A of the arc wall portion 60, and the inner wall 80B is on the vertical wall Inner wall 3 of section 38
8B, and the inner wall 80C is set to be substantially directly above the corner 62C of the partially arcuate wall portion 62.

The second plate part 30 is formed with an arcuate second plate part guide convex part 84 protruding from the base plate part 82 so as to correspond to the second plate part guide concave part 44 . The second plate guide convex part 84 has a side wall part 88 similar to the first plate guide convex part 70.
is formed. Second plate guide convex portion 84
The outer arcuate wall 84A and the inner arcuate wall 84B are the second
The second rotation center B of the hinge part 34 is the center of curvature, and its radius of curvature, width, etc. correspond to each part of the second plate guide recess 44, as in the case of the first plate guide convex part 70. The engagement recess 90 and the locking projection 92 formed on the second plate guide projection 84 are also correspondingly matched.

The block portion 26 has a holding portion 9 on the base portion 46.
4 and a first mounting portion 96 are attached. The holding portion 94 is formed to protrude laterally from the vertical wall portion 38 in such a manner that a hook portion 94A is reinforced by a rib portion 94B.

The first mounting portion 96 is formed to protrude downward from the horizontal wall portion 36 and includes a seat plate portion 98 and a leg portion 100 hanging from the seat plate portion 98. The seat plate portion 98 has a flat plate shape with both ends bent diagonally downward, and a cylindrical contact portion 102 is formed at both ends. The seat plate portion 98 is elastically deformable so that the contact portion 102 moves upward.

As shown in FIG. 8, the leg portion 100 includes a flat central leg portion 104, and extends diagonally upward from the lower end of the central leg portion 104 in both directions in the thickness direction of the central leg portion 104. A pair of side legs 106 are provided. As shown in FIG. 5, the central leg portion 104 has a parallel portion 104A on the upper side and a tapered portion 104B on the lower side. Parallel part 104
A side surface 104C on the right side in FIG. 5 is shaped like an arc. A thick portion 108 is formed in the parallel portion 104A. The side leg portion 106 has a stepped outer surface at its free end, thereby forming a vertical surface 110 and a horizontal surface 112.

Both vertical surfaces 110 of the pair of side legs 106, the thick portion 108 of the center leg 104, and the side surface 104C are as follows:
As shown in FIG. 8, one of the closed lines formed by a large-diameter circular arc G with radius R1, a small-diameter circular arc H with radius R2, and common tangents I and J of these circular arcs G and H. The curvature and relative positional relationship are set to match the area. That is, the vertical surface 110 and the side surface 104C are aligned with the large diameter arc G, and the thick wall portion 10
8 coincides with a small-diameter circular arc H and a portion of common tangents I and J that are continuous thereto.

A second mounting portion 114 is provided on the second plate portion 30.
is attached. The second mounting portion 114 protrudes from the second plate portion 30 and uses the second plate portion 30 as a seat plate portion, and the leg portion 116 is connected to the central leg portion 118.
and a pair of side legs 120 extending diagonally downward from the upper end of the center leg 118 in both directions in the thickness direction of the center leg 118. Side leg 1
20 has basically the same shape as the side leg portion 106 of the first attachment portion 96 . The central leg portion 118 has a symmetrical shape in FIG. 5, and its length in the left-right direction is approximately equal to the diameter of the circular through hole into which the leg portion 116 is inserted.

FIG. 10 shows two hinge structures 24 of this embodiment.
An application example is shown in which the upper PCB 12 can be opened and closed with two PCBs 12 separated by a predetermined distance in the vertical direction. It has become something without.

A through hole 122 whose outline approximately coincides with the closed line formed by the circular arcs G and H and their common tangents I and J described above in FIG. 8 is bored in the lower PCB 12. . The hinge structure 24 includes a seat plate portion 98 which is elastically deformed by the contact portion 102 being slightly displaced upward when the leg portion 100 of the first attachment portion 96 is inserted into the through hole 122; Side leg 1
The PCB 12 is pressed and held between the horizontal surfaces 112 of the side legs 106 and the vertical surfaces 110 of the side legs 106 are
04 is held on the center line of the through hole 122. In addition, as shown in FIG. 13, the central leg 104
Due to its shape, the hinge structure 24 is held on the center line of the through hole 122, and is made unrotatable to prevent the hinge structure 24 from being rotated.

A circular through hole 124 is bored in the upper PCB 12, into which the leg part 116 of the second mounting part 114 is inserted, and the second plate part 30 and the side leg part 120 are inserted.
The PCB 12 is pressed and held between the two. Although the second mounting portion 114 cannot prevent relative rotation with the PCB 12, this does not pose a problem in this application example.

The state of the hinge structure 24 shown in FIG. 10 is the normal state in which the upper PCB 12 is closed [FIG. 9C is also in this state. ]. In this state, the first plate part 28 has the first plate part guide protrusion 70 fitted into the first plate part guide recess 42 of the block part 26 and the engagement recess 76 fitted into the engagement protrusion 56. , the locking protrusion 78 is fitted into the locking recess 58. Further, the second plate portion 30 is
The second plate guide protrusion 84 is fitted into the second plate guide recess 44 , the engagement recess 90 is fitted into the engagement protrusion 64 , and the locking projection 92 is fitted into the locking recess 66 . There is.

Thereby, the first plate part 28 and the second plate part 30 are restrained by the block part 26, and will not be lifted up by the elastic force of the first hinge part 32 and the second hinge part 34. Furthermore, since the first plate guide protrusion 70 is fitted into the first plate guide recess 42 and the side wall 74 and the inner wall 38B of the vertical wall 38 are opposed to each other,
The first plate portion 28 is prevented from wobbling in the left-right direction in FIG. Similarly, the second plate portion 30 is also prevented from wobbling in the left-right direction in FIG.

Furthermore, since the first plate portion guide convex portion 70 is opposed to the central wall portion 40 and the side wall portion 74 is partially opposed to the side wall 54B of the arcuate wall portion 54, the first plate portion 28 is Shaking in the direction perpendicular to the plane of the drawing is prevented. Similarly, the second plate portion 30 is also prevented from wobbling forward in the direction perpendicular to the plane of FIG. 10. Accordingly, since the first plate part 28 and the second plate part 30 are connected via the second hinge part 34, both are prevented from shaking in the direction perpendicular to the plane of FIG. 10.

The upper PCB 12 does not move relative to the lower PCB 12 because the first plate part 28 and the second plate part 30 do not float upward or wobble in all directions (up, down, left, right, front, back, etc.), and in the conventional case Unlike the above, it is not necessary to install a PCB support 22. Furthermore, since floating is prevented, the space will not become narrow.

The upper PCB 12 is designed to be opened during repair and inspection. When the PCB 12 is opened, the right end in FIG. 10 (not shown) is lifted and the PCB 12 is opened as shown in FIG. 11 using the second hinge part 34 as a fulcrum. It can be done. If the PCB 12 wobbles in the left-right direction in FIG. 11 when it begins to open, it will come into contact with the chassis 20 located at the left end of the PCB 12 and be prevented from rotating. However, in the hinge structure 24 of this embodiment, when the second plate part 30 starts to open, the second plate part guide convex part 84 is guided by the second plate part guide concave part 44 when it is opened.
The above problem does not occur.

In addition, when the second plate part 30 starts to open,
Then, each part is slightly elastically deformed to form the engagement recess 90.
is disengaged from the engagement projection 64, and the locking projection 92 is released from the locking recess 66.

When the PCB 12 is further lifted from the state shown in FIG. 11, the first plate section 28 is opened in the same manner as the second plate section 30. As a result, the left end of the upper PCB 12 in the drawing is separated from the lower PCB 12, so the lower PCB 12
12 will not come into contact with it. Finally the 12th
As shown in the figure, when the left end of the PCB 12 is inserted into the hook portion 94A of the holding portion 94, the PCB 12 is held in that state. Therefore, during repair and inspection, P.
There is no need to hold C.B12.

PCB 12 is closed by reversing the steps above,
In this case as well, for the same reason as above, chassis 2
0 or the PCB 12 below.

In this way, in the hinge structure 24 of this embodiment,
Not only can the relative rotation of the second plate part 30 with respect to the block part 26 be accurately guided within a predetermined range without any deviation in the rotation locus, but also the first plate part 28 and the second plate part 30 can be prevented from lifting up. , and has the effect of being able to be restrained without shaking in any direction.

In addition, although the above embodiment was applied to a double hinge structure, it is of course applicable to a single hinge structure.

[Effects of the Invention] As explained above, the hinge structure according to the present invention has the effect of being able to accurately guide the relative rotation of the first member with respect to the second member within at least a predetermined range.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the hinge structure according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a bottom view of Fig. 1, and Fig. 4 is a rear view of Fig. 1. Figure, 5th
The figure corresponds to a side view of Fig. 1, Fig. 6 corresponds to a view taken along the - line in Fig. 1, Fig. 7 corresponds to a detailed view of the part in Fig. 1, and Fig. 8 corresponds to a view taken along the - line of Fig. 1. Perspective view, No. 9
Figures A, B, and C are perspective views showing three aspects of the embodiment, Figures 10 to 12 are front views showing three aspects of the application example of this example, and Figure 13 is the - line arrow in Figure 10. A perspective view, FIG. 14 is a front view showing an example of application of a conventional hinge structure, and FIG. 15 is a detailed view of the hinge portion of FIG. 14. 24... Hinge structure, 26... Block portion,
28...first plate part, 30...second plate part, 32...first hinge part, 34...second hinge part, 42...first plate part guide recess, 44...
Second plate guide recess, 70...first plate guide convex, 84...second plate guide convex.

Claims (1)

[Claims for Utility Model Registration] (1) A hinge structure in which a hinge portion that connects a first member and a second member in a relatively rotatable manner is constructed by utilizing the flexibility of the first member and the second member. In,
a guide recess formed in the first member and having an arc-shaped sliding surface; and a guide recess formed in the second member that separates from the sliding surface of the guide recess while the second member rotates about the hinge part. a guide convex portion that has a guide surface that slides smoothly and guides the second member without causing any wobbling in the rotation trajectory; the first engaging means, which is provided at the widthwise end of the tip of the guide surface of the guide protrusion, and is fitted with the first engagement means after the guide protrusion is inserted into the guide recess; first member and second member
A hinge structure comprising: second engagement means for fixing the member. (2) The hinge structure according to claim (1), wherein the first member, the second member, and the hinge portion thereof are integrally molded from synthetic resin.