JPH0610941A - Plastic integrally molded hinge structure - Google Patents

Abstract

PURPOSE:To solve the gap between the shaft part of a shaft part side member and the shaft hole part of a part side member at rotating operation without loosening the durability of each molding die applied to integral molding, avoid the shaking between the both, provide a click feeling in the rotating operating position, as occasion demands, and ensure this position. CONSTITUTION:A plastic integrally molded hinge structure has a shaft part side member 11 having a shaft part 12 having a determined outer diameter protruded and a plurality of recessed parts 13 having a required radius formed in determined angle space positions on the outer circumferential surface of the shaft part 12; and a bearing part side member 21 having a shaft hole part 22 having a determined bore for fitting and receiving the shaft part 12 with a required gap and a plurality of protruding parts 23 having a required radius conformed or nearly conformed to the outer circumferential surface of the shaft part 12 in angle space positions corresponding to the respective recessed parts 13 formed on at least the hole bottom part side of the shaft hole part 22. The shaft part side member 11 and the bearing part side member 21 are integrally molded in the state where the shaft part 12 is fitted and received in the shaft hole part 22, and each protruding part 23 is opposed to each recessed part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic integrally-molded hinge structure. More specifically, the present invention relates to a plastic integrally-formed hinge structure. More specifically, the shaft portion of one member (hereinafter referred to as a shaft side member) and the shaft portion A hinge structure by a so-called plastic integral molding die, which is configured by integrally molding a bearing portion of the other member (hereinafter, referred to as a bearing portion side member) that can be rotated in a fitted state at the same time. Is.

[0002]

17 and 18 are a front view of a main portion showing a schematic structure of a plastic integrally molded hinge structure of this kind in a conventional example, and a vertical sectional view of a line BB of the same. Further, FIGS. 19 and 20 are perspective views showing a schematic configuration of relevant parts in a molding die for molding the plastic integral molding die hinge structure, and an explanatory view showing a die arrangement at the time of molding the same. is there.

In the constructions shown in FIGS. 17 and 18, the plastic integrally molded hinge structure in the conventional example has a predetermined shaft portion outer diameter a ₂ (normally) with respect to the shaft portion side member 51. In this case, for example, the shaft portion 52 of about 3 mmφ) is integrally projected with a predetermined shaft portion length b, and a predetermined draft angle gradient θ ₂ (also similarly to the bearing portion side member 61 on the inner peripheral surface). , For example, about 3 °), the predetermined inner diameter of the shaft hole portion a ₂ + Δa ₂ (similarly, for example, 3.6 mmφ
The shaft hole portion 62 has a predetermined shaft hole length b ₂ −Δb
₂ is integrally formed, and as a result, a gap c ₂ corresponding to Δb _{2 is provided} between the facing surfaces of the shaft portion side member 51 and the bearing portion side member 61, the outer peripheral surface of the shaft portion 52 and the shaft. so that between the inner peripheral surface of the hole portion 62 Δa _2/2 corresponding gap d ₂ is formed.

However, the shaft-side member 51 having the shaft 52 projected and the bearing-side member 61 having the shaft hole 62 are made of a plastic material, and a suitable molten resin is provided between them. 19 and FIG. 20, the first molding dies 71 in the form of a set shown in FIG. 19 and FIG. With the second molding die (slider) 81 formed into the above, all of them are integrally molded at the same time.
That is, each of the first molding dies 7 made up of the above-mentioned set
No. 1 has a semicircular arc-shaped notch 72 corresponding to the outer diameter a ₂ of the shaft 52 in a state where the plate thickness corresponds to the gap c ₂ corresponding to Δb ₂ and the two are abutted. Further, the second molding die 81 has an outer peripheral surface corresponding to the draft angle gradient θ ₂ and is provided on the end surface side to be brought into contact with each first molding die 71 in a state of being butted against each other. A hole portion 82 corresponding to the shaft portion 52 is formed.

Therefore, in the plastic integrally-molded hinge structure in which the shaft-side member 51 and the bearing-side member 61 are integrally molded at the same time, the shaft-side member 51 is formed.
Be between the shaft hole 62 of the shaft portion 52 and the bearing portion side member 61 of, .DELTA.a _2/2 corresponding gap d ₂ is intended to have the presentゝ, shaft hole relative to the shaft portion 52 in thisゝSince the portion 62 is integrally molded in the fitted state, after the integral molding,
The shaft portion side member 51 and the bearing portion side member 61 can be immediately hinged to each other, that is, can be rotated without going through the mutual assembly process. There is an advantage that it is not necessary to fit the shaft hole portion 62 of the bearing portion side member 61 to the shaft portion 52 of the shaft portion side member 51 and assemble it again after separately molding the bearing portion side member 61. .

[0006]

However, in the case of the conventional integrally-molded hinge structure having the above-described structure, as described above, the shaft portion 52 of the shaft portion side member 51 and the bearing portion side member 61 are formed. .DELTA.a _2/2 equivalent of each gap d ₂ that exists between the shaft hole 62, i.e., in order of the gap by 2d _2,
There is a disadvantage that so-called rattling occurs between these two and highly accurate fitting cannot be achieved.

Then, the shaft portion 52 and the shaft hole portion 62 are formed.
In order to eliminate rattling between the second molding die 81 and
It is only necessary to form the cylindrical end face having the hole portion 82, that is, the plate thickness of the push-cut portion as thin as possible.
Since the cylindrical end surface of the second molding die 81 is brought into contact with each first molding die 71 every time it is integrally molded, its durability is difficult, and at the same time, the durability is improved. To increase the thickness of the cylindrical end face in order to increase the thickness, there is a contradiction that rattling becomes even greater, and even if the durability of the molding die is disregarded, the rattling itself will result. Complete elimination was physically and practically impossible.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to perform a rotating operation without impairing the durability of each molding die applied to integral molding. The gap between the shaft portion of the shaft side member and the shaft hole portion of the bearing side member during movement is eliminated or made as small as possible so that rattling between them can be avoided. ， It is to provide this type of plastic integrally molded hinge structure.

[0009]

In order to achieve the above-mentioned object, a plastic integrally-molded hinge structure according to the present invention has a shaft portion with a predetermined outer diameter projected and a predetermined angle on the outer peripheral surface of the shaft portion. A shaft part side member having a plurality of recesses formed at required intervals with a required radius and a shaft hole part having a predetermined inner diameter for receiving the shaft part in a gap as narrow as possible are formed.
And, at least on the bottom side of the shaft hole portion, the bearing portion side on which a plurality of convex portions having the required radii that match or approximately match the outer peripheral surface of the shaft portion are formed at angular intervals corresponding to the concave portions. A member, and the shaft portion is fitted into the shaft hole portion to be received, and the convex portion is opposed to the concave portion, the shaft portion side member and the bearing portion side member are integrally molded. It is characterized by being configured.

[0010]

Therefore, in the integrally-formed hinge structure of the present invention, in the non-rotational operating position, the respective concave portions of the shaft side member and the convex portions of the bearing side member are opposed at a predetermined angular position,
There is rattling due to the gaps corresponding to the recesses of each of these recesses, but when the shaft-side member and the bearing-side member are mutually provided between the recesses and the projections from the non-rotating operation position. By rotating within the angle range, the outer peripheral surface of the shaft part and the outer surface of each convex part are in contact with each other and rotate, so rattling at this point is eliminated and smooth operation is achieved. I can do it.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a plastic integrally-molded hinge structure according to the present invention will be described below in detail with reference to FIGS.

FIGS. 1 and 2 show a plastic integrally-molded hinge structure to which an embodiment of the present invention is applied. In this case, one recessed portion arranged on a horizontal reference line in the shaft portion of the shaft side member is used as a reference. In this way, the outline of the structure of the hinge structure in which the respective concave portions are distributed at three equiangular intervals (120 ° each) and the same number of the respective convex portions are distributed at equal angular intervals is also shown for the bearing side member. Front view of the part, and A-A above
FIG. 3 is a vertical cross-sectional view of a line portion, and FIG. 3 and FIG. 4 are perspective views showing a schematic configuration of relevant portions in a molding die for molding the plastic integral molding die hinge structure, and the same die at the time of molding. It is explanatory drawing which shows arrangement.

5 and 6 are side explanatory views respectively showing a non-rotating operation state position and a rotation operation state position when the same hinge structure is used in a horizontal (0 °) position. 7 and 8 are side explanatory views respectively showing a non-rotating operation state position and a rotation operation state position when the same hinge structure is used at an inclined (15 °) position. FIG. 10 and FIG. 10 are side explanatory views respectively showing a non-rotating operation state position and a rotation operation state position when the same hinge structure is used at an inclined (30 °) position.

Further, FIGS. 11 and 12 show that the recesses are equiangularly spaced (90 ° apart) at four locations across the horizontal reference line of the shaft of the shaft side member in another embodiment. Similarly for the distribution and bearing side members, the non-rotational operation position and the rotation position when the hinge structure configured by distributing the same number of convex parts at equal angular intervals is used at the horizontal (0 °) position FIG. 13 is a side explanatory view showing the operating state position separately, FIG. 13 and FIG. 14 are the non-rotating operating state position when the hinge structure is used in the inclined (30 °) position,
And FIG. 15 are side explanatory views respectively showing the rotational operation state position, and FIGS. 15 and 16 are other examples in which the concave portions and the convex portions are arranged correspondingly at unequal angular intervals. FIG. 6 is a side view illustrating the non-rotational operation state position and the rotation operation state position when the hinge structure according to is used in the inclined (15 °) position.

In the constructions shown in FIGS. 1 and 2, the plastic integrally-molded hinge structure according to the embodiment is constructed as follows.

[0016] That is, first, with respect to the shaft-side member 11, with the shaft portion 12 by a predetermined axial outer diameter a ₁ is integrally protruded in a predetermined shank lengths b _1, the shaft portion 12 At a predetermined equiangular spacing position on the outer peripheral surface of the shaft, or at a substantially equiangular spacing position and a plurality of recesses each having a predetermined radius, and in this embodiment, they are arranged on the horizontal reference line of the shaft portion 12. The recesses 13 are formed at three locations of 120 ° each with respect to one recess, and the bearing side member 21 includes a predetermined draft angle gradient θ ₁ on the inner peripheral surface. so,
The shaft hole portion 22 having a predetermined shaft hole portion inner diameter a ₁ + Δa ₁ is integrally formed with a predetermined shaft hole portion length b ₁ −Δb ₁ , and each of the shaft hole portions 22 at least at the hole bottom side is formed. Equiangularly spaced positions corresponding to the recesses 13, or approximately equiangularly spaced positions and required radii concentric with the respective recesses 13,
Here, the same number of the respective convex portions 23 having a required radius which is or substantially coincides with the outer peripheral surface of the shaft portion 12 has a thickness e ₁
Is formed so as to project, and as a result, a gap c corresponding to Δb _{1 is provided} between the facing surfaces of the shaft side member 11 and the bearing side member 21.
₁ , between the outer peripheral surface of the shaft portion 12 and the inner peripheral surface of the shaft hole portion 22
It is formed in a _1/2 corresponding gap d _1, respectively, and also non-turnable operation position shown in FIG. 1, therefore, what the molded position, the each recess 13 and the convex portion 23 is opposed The gap f corresponding to the depression of each recess 13 is generated. At the rotation operating position described later, the outer peripheral surface of the shaft portion 12 and the surface of each projection 23 are aligned or substantially aligned. It will be.

However, here again, these shaft parts 1
The shaft-side member 11 with the protruding portion 2 and the bearing-side member 21 with the shaft hole 22 formed therein are made of a plastic material and are communicated with each other through an appropriate molten resin introducing gate flow path. As a result, the pair of plate-shaped first molding dies 31 shown in FIGS. 3 and 4 and the second molding dies having the tip end formed into a cylindrical shape corresponding to the shaft portion 12 are formed. (slider)
41 and 41 are integrally molded at the same time.

That is, each of the first set of the above
With respect to the molding die 31, the plate thickness is made to correspond to the gap d ₁ of the portion corresponding to Δa ₁ and, in a state where they are abutted, each semi-arc shape corresponding to the outer diameter a ₁ of the shaft portion 12. The notch 32 of each is formed.

Further, the outer peripheral surface of the second molding die 41 is made to correspond to the draft angle gradient θ ₁ ,
And the first molding dies 31 in a state of being butted against each other
A hole portion 42 for forming the shaft portion 12 is formed on the end face side to be brought into contact with, and equiangularly spaced positions corresponding to the concave portions 13 on the inner peripheral surface of the hole portion 42, Alternatively, the convex strips 43 for forming the concave portions 13 are provided at substantially equiangular intervals over the entire length,
Further, the respective convex portions 23 are formed at the equiangularly spaced positions corresponding to the respective convex portions 23 on the outer peripheral surface, or at substantially equiangularly spaced positions with a length corresponding to the thickness e ₁ from the end face. Each recessed strip 44 is provided as a recess. And here,
The thickness of the peripheral wall portion corresponding to each of the convex stripes 43 and the concave stripes 44 is made as thin as possible, in other words, the facing gap between the concave portions 13 and the convex portions 23 is made as small as possible. In addition, by forming the thickness of the peripheral wall portion other than that as thick as possible, sufficient strength on the end face side is secured.

Therefore, in the integrally-molded hinge structure constructed by integrally molding the shaft-side member 11 and the bearing-side member 21 at the same time, as in the conventional case,
.DELTA.a _1/2 the gap d ₁ equivalent between the shaft hole 22 of the shaft portion 12 and the bearing portion side member 21 of the shaft-side member 11, and thus, although the gap of 2d ₁ is present, while the The concave portions 13 are formed on the outer peripheral surface of the shaft portion 12 in a manner according to the above conditions, and the convex portions 23 are formed on the inner peripheral surface of the shaft hole portion 22 according to the above conditions. 1 and the non-rotational operating position shown in FIG. 5, the concave portions 13 and the convex portions 23 are opposed to each other at a predetermined angular position. The gaps f corresponding to the recesses of the respective recesses 13, and thus the shaft side member 11
There is rattling between the shaft-side member 11 and the bearing-side member 21, but from the non-rotational operating position, either one of the shaft-side member 11 and the bearing-side member 21 is In ゝ, the bearing portion side member 21 is temporarily moved to the shaft portion side member 11 within the angular range of the concave portions 13 and the convex portions 23.
When the rotation operation is started, the outer peripheral surface of the shaft portion 12 and the outer surface of each of the convex portions 23 of the shaft hole portion 22 coincide with each other or almost coincide with each other, and reach the rotation operation position. At this time, as shown in FIG. 6, the rattling is eliminated, and thus the mutual hinge action, that is, the pivoting action, of the shaft portion side member 11 and the bearing portion side member 21. Can be done smoothly.

5 and 6 show the non-rotating operation state position and the rotating operation state position when the hinge structure is used in the horizontal (0 °) position, respectively. As shown in FIGS. 7 and 8, when the hinge structure is used in a tilted (15 °) position, and FIG.
As shown in FIG. 10 and FIG. 10, in each of the case where the hinge structure is used in the inclined (30 °) position as well, in the rotation operation from the non-rotation operation position to the rotation operation position, Similarly to the outer peripheral surface of the shaft portion 12 and the shaft hole portion 2
When the outer surface of each of the convex portions 23 of 2 coincides with the outer surface of the convex portion 23, or is almost coincident with each other and is rotated in contact with each other, the rotating action is smoothly performed, and at the time when the rotating operation position is reached. Then
With respect to the position of each recess 13 on the shaft portion 12, the shaft hole portion 22
Since each of the above convex portions 23 falls down in unison with each other, at the rotational operation position, a modest operational sensation, that is, a so-called click feeling can be obtained and the end of the rotational operation can be perceived. , The shaft side member 11 at the operation end position
Securing the bearing part side member 21 against the
Can be locked. At this operation end position, due to the gravity acting on the bearing portion side member 21, the inner peripheral surface lower part of the outer peripheral surface of the shaft portion 12 and the inner peripheral surface including a part of the convex portion 23 in the shaft hole portion 22. Although it will create a gap between the lower part,
There is no particular problem as long as the acting force from the lower side to the upper side is not applied to the bearing portion side member 21 at the operation end position and further at the use position.

Further, FIGS. 11 and 12 show a hinge structure to which another embodiment of the present invention is applied. This Figure 1
In the case of the embodiment shown in FIG. 1 and FIG. 12, the recesses 13 are distributed at equal angular intervals (90 ° each) to four positions on the shaft side member 11 across the horizontal reference line of the shaft 12. Similarly, the bearing portion side member 21 is also configured by arranging the same number of convex portions 23 at equal angular intervals, and when the hinge structure configured in this manner is used at the horizontal (0 °) position. As in the cases of FIGS. 7 and 8 and FIGS. 9 and 10, smoothing of the rotation operation, click feeling at the rotation operation position, and securing of the bearing portion side member 21 , Locking is possible respectively. And
As shown in FIGS. 13 and 14, when the hinge structure according to another embodiment of the present invention is used in the inclined (30 °) position, it is similar to the case of FIGS. 5 and 6. Further, the rattling between the shaft portion side member 11 and the bearing portion side member 21 is eliminated, and the hinge action and the turning action can be smoothly performed.

Further, FIGS. 15 and 16 show a hinge structure to which still another embodiment of the present invention is applied. In the case of the embodiments shown in FIGS. 15 and 16, the concave portions 13 of the shaft portion side member 11 and the convex portions 23 of the bearing portion side member 21 are formed at unequal angular intervals. Also, by using the hinge structure configured as described above at the inclined (15 °) position, the click feeling at the rotation operation position and the operation position at the rotation operation position can be obtained as in the case of the corresponding embodiments. This secures and locks the bearing portion side member 21.

Therefore, as described above, each concave portion 13 and each convex portion 2
The desired action and effect can be arbitrarily and easily achieved by setting various numbers and angular intervals in combination with three.

[0025]

As described above in detail with reference to the embodiments,
According to this invention, the shaft portion having the predetermined outer diameter is projected, and the shaft portion side member in which the plurality of concave portions having the required radii are formed on the outer peripheral surface of the shaft portion at the predetermined angular interval positions is provided. A required radius that forms a shaft hole with a predetermined inner diameter that can be accommodated in the gap, and that matches the outer peripheral surface of the shaft at the desired angular interval position corresponding to each recess at least on the hole bottom side of the shaft hole, or that is approximately the same. And a bearing-side member having a plurality of convex portions formed therein, the shaft portion is fitted in the shaft hole portion and received, and the convex portions face the concave portions. Since the member and the bearing portion side member are integrally formed, the recesses of the shaft portion side member and the protrusions of the bearing portion side member are formed without impairing the durability of each mold applied to the integral molding. At the non-rotational operating position where they oppose each other at a predetermined angular position, a gap corresponding to the depression of each recess is formed. Therefore, rattling occurs, but when the shaft-side member and the bearing-side member are rotationally operated within the angular range between the concave portions and the convex portions from this non-rotating operation position, the outer periphery of the shaft portion Since the surface and the outer surface of each convex portion are in contact with each other, the hinge action can be performed with good accuracy, and as a result, rattling at the time of rotation operation can be eliminated and smooth operation can be performed, and as necessary. Accordingly, there is an excellent feature such that a required click feeling and a securement of the position can be obtained at the rotation operation position.

[Brief description of drawings]

FIG. 1 is a plastic integrally-molded hinge structure to which an embodiment of the present invention is applied. In this case, three positions are set on the basis of one concave portion arranged on a horizontal reference line in a shaft portion of a shaft side member. Each concave portion is distributed at equal angular intervals (120 ° apart), and similarly for the bearing side member, the front view of the main part showing the schematic structure of the hinge structure in which the same number of convex portions are distributed at equal angular intervals. It is a figure.

FIG. 2 is a vertical sectional view taken along the line AA in FIG.

FIG. 3 is a perspective view showing a schematic configuration of relevant parts in a molding die for molding the plastic integrally-molded hinge structure according to the embodiment.

FIG. 4 is an explanatory view showing a die arrangement at the time of molding.

[FIG. 5] Horizontal (0 °) hinge structure according to the above embodiment
It is a side surface explanatory view showing a non-rotation operation state position when it uses at a position.

FIG. 6 is an explanatory side view showing a rotation operation state position at the horizontal (0 °) position of the same.

FIG. 7 is a view showing the hinge structure according to the embodiment of the same as above (15)
FIG. 19 is a side view illustrating a non-rotating operation state position when used in the () position.

FIG. 8 is an explanatory side view showing a rotation operation state position at the same tilt (15 °) position.

FIG. 9 is a perspective view of the hinge structure according to the embodiment of the same.
FIG. 19 is a side view illustrating a non-rotating operation state position when used in the () position.

FIG. 10 is an explanatory side view showing a rotation operation state position at the same tilt (30 °) position.

FIG. 11 is a sectional view of a shaft side member to which another embodiment of the present invention is applied, in which four recesses are arranged at equal angular intervals (90 ° each) over the horizontal reference line in the shaft section, and the bearing section side is provided. Similarly, regarding members, it is a side explanatory view showing a non-rotating operation state position when a hinge structure configured by arranging the same number of convex portions at equal angular intervals is used at a horizontal (0 °) position.

FIG. 12 is a side explanatory view showing a rotation operation state position at the horizontal (0 °) position in the above.

FIG. 13 is a view showing a hinge structure according to another embodiment of the invention.
It is a side explanatory view showing a non-rotating operation state position when used in the 0 ° position.

FIG. 14 is an explanatory side view showing a rotation operation state position at the same tilt (30 °) position.

FIG. 15 shows a non-rotating operation state position when a hinge structure configured by arranging concave portions and convex portions corresponding to each other at unequal angular intervals according to another example of the present invention is used at an inclined (15 °) position. It is a side explanatory view shown.

FIG. 16 is a side view for explaining the rotation operation state position at the horizontal (15 °) position.

FIG. 17 is a front view of a main part showing a schematic configuration of a plastic integrally-molded hinge structure according to a conventional example.

FIG. 18 is a vertical cross-sectional view taken along line BB in FIG. 7 above.

FIG. 19 is a perspective view showing a schematic configuration of relevant parts in a molding die for molding a plastic integrally-molded hinge structure according to the conventional example.

FIG. 20 is an explanatory view showing a die arrangement at the time of molding.

[Explanation of symbols]

 11 Shaft part side member 12 Shaft part 13 Recessed part 21 Bearing part side member 22 Shaft hole part 23 Convex part 31 First molding die 32 Semi-circular cutout part 41 Second molding die 42 Hole part 43 Convex strip 44 Concave Article

Claims (1)

[Claims] 1. A shaft-side member in which a shaft having a predetermined outer diameter is projected, and a plurality of recesses having a required radius are formed at outer peripheral surfaces of the shaft at predetermined angular intervals, and the shaft is movable. A shaft hole portion having a predetermined inner diameter to be received with a narrower gap is formed, and at least the hole bottom side of the shaft hole portion matches the outer peripheral surface of the shaft portion at angular intervals corresponding to the recesses, or A bearing-side member having a plurality of protrusions having substantially the same required radii formed therein, the shaft being fitted into the shaft hole and received, and the protrusions facing the recesses. In this state, a plastic integrally-molded hinge structure in which the shaft-side member and the bearing-side member are integrally molded.