JP3052383B2 - Rotating fulcrum structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating fulcrum structure such as an opening / closing cover, and more particularly to a rotating fulcrum structure which can be assembled by utilizing the elasticity of members.

2. Description of the Related Art Recently, various structures have been used for a hinge portion of an opening / closing cover of an office machine such as a printer, and the most common mechanism is a hinge or a structure similar thereto, which is provided with a round hole on one side and a circular hole on the other side. There is a case in which the mounted shaft is fitted into a round hole to serve as a rotation fulcrum. However, since additional members are required for mounting members, the number of parts is small due to cost reduction requirements.
A rotation fulcrum structure that is easy to assemble is desired.

[0003]

2. Description of the Related Art FIG. 7 shows an example of an opening / closing cover used in an office machine, where (a) is a front sectional view, (b) is a side view, and (c).
FIG. 4 is an exploded perspective view of a support.

In FIGS. 7 (a) and 7 (b), 1a is a housing, 2a
Denotes a cover, 3 denotes a support, 4 denotes a spring, and 5 denotes a hook for locking the housing 1a and the cover 2a. The housing 1a and the cover 2a are rigid, and the support portions 3 are provided on both sides. As shown in FIG. 7 (c) , the supporting portion 3 is provided with holes 6a and 7 in the housing 1a and the cover 2a, respectively.
2a is inserted, the support shaft 8a is passed through the holes 6a, 7 and fixed by screws 9.

[0005] With such a configuration, the hook 5 is normally hooked on the housing 1a, and when the hook 5 is removed, the cover 2a is pivotally opened by the spring 4 with the support shaft 8a as a fulcrum.

[0006]

According to the above-mentioned conventional method, a part constituting a rotation fulcrum requires a support shaft, a screw, and the like.
Since the number of parts is large, it is necessary to insert the support shaft by aligning the holes of both the housing and the cover even during the assembling work, and there is a problem that workability is poor and man-hours are required.

An object of the present invention is to provide a rotating fulcrum structure which requires a small number of parts and is easy to assemble.

[0008]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 1 (a) is a perspective view corresponding to claim 1, and FIG.
It is a perspective view corresponding to FIG. (1) Means Corresponding to Claim 1 In FIG. 1 (a), reference numeral 6 denotes a shaft hole, 8 denotes a shaft portion, 11 denotes a protruding edge portion, and 1 denotes a shaft hole 6; A fixed plate provided with a ring-shaped protruding edge 11 having a predetermined height, and a slope 12 formed in a predetermined direction from an edge of an upper surface of the protruding edge 11, 2 is formed to have a predetermined width with an elastic material, Is a movable plate having a shaft portion 8 having a diameter protruding from one surface at a predetermined height and rotatably fitted in the shaft hole 6.

Therefore, the shaft 8 of the movable plate 2 is connected to the slope of the fixed plate 1.
The movable plate 2 is bent by sliding the shaft 12, and the shaft 8 is fitted into the shaft hole 6. (2) Means Corresponding to Claim 2 In FIG. 1 (b), 6 is a shaft hole, 8 is a shaft portion, 11 is a protruding edge portion, 18 is a slit, and 10 is formed of an elastic material.
A shaft hole 6, a protruding edge 11 having a ring shape having a predetermined height is provided on one surface of the outer periphery of the shaft hole 6, and a slope 12 is formed in a predetermined direction from an edge of an upper surface of the protruding edge 11. Slope from opposite edges of
A fixed plate 20 provided with a plurality of slits 18 each having a predetermined length in a direction sandwiching 12 has a predetermined width, and has a diameter which projects at a predetermined height on one surface of a tip portion and rotatably fits in the shaft hole 6. Shaft 8 of
Is a movable plate.

Therefore, the shaft 8 of the movable plate 20 is connected to the slope of the fixed plate 10.
When the sliding member 12 is slid, the portion of the fixing plate 10 sandwiched by the plurality of slits 18 is bent, and the shaft portion 8 is fitted into the shaft hole 6.

[0011]

(1) Action corresponding to claim 1 When the fixed plate 1 and the movable plate 2 are overlapped and the shaft 8 at the tip of the movable plate 2 is slid against the inclined surface 12 of the fixed plate 1, the elasticity is increased. When the movable plate 2 bends and the shaft portion 8 escapes and the shaft portion 8 reaches the shaft hole 6, the shaft portion 8 is fitted into the shaft hole 6 by elastic restoring force. Therefore, the shaft hole 6, the protruding edge 11 and the slope 12 are formed in the fixing plate 1.
By simply forming the shaft portion 8 on the movable plate 2, no other mounting parts are required, and the assembly can be easily performed. (2) Action corresponding to claim 2 In a state where the fixed plate 1 and the movable plate 2 are overlapped with each other, when the shaft 8 at the tip of the movable plate 2 is slid against the inclined surface 12 of the fixed plate 1, the fixed plate 10 is elastically fixed. When the shaft portion 8 reaches the shaft hole 6, the shaft portion 8 is fitted into the shaft hole 6 by elastic restoring force. Therefore,
The fixing plate 1 has a shaft hole 6, a projecting edge 11, a slope 12 and a slit 18.
By simply forming the shaft portion 8 on the movable plate 2, no other mounting parts are required, and the assembly can be easily performed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) Embodiment Corresponding to Claim 1 An embodiment corresponding to claim 1 of the present invention will be described below with reference to FIGS. The same reference numerals indicate the same objects throughout the drawings.

FIG. 2 shows an embodiment in which the present invention is applied to a rotation fulcrum similar to the support described in the conventional example. Side plate 10 of FIG.
a and the arm 20a are the fixed plate 1 and the movable plate 2 shown in FIG.
Respectively.

FIGS. 2 (a) and 2 (b) are perspective views of left and right rotation fulcrums, and as shown in FIG.
Is formed of a hard synthetic resin material, a shaft hole 6b is provided at a lower end of a portion where the thickness of the side plate 10a is reduced, a protruding edge 11a is formed on the outer periphery of the shaft hole 6b, and an upper side of the protruding edge 11a is formed. Side plate 10
A slope 12a is provided toward the surface a. This slope
A step portion 13 large enough to allow a shaft portion 8b of an arm 20a described later to enter a thick portion on the left side in the drawing of the upper side plate 10a of the upper side 12a.
Is provided.

The lower portion of the protruding edge portion 11a is thicker, and a groove 14 including an arc-shaped notch is provided from the right side to the lower side in the drawing of the protruding edge portion 11a.
A through-hole 15 is formed in the lower part of. (The through hole 15 is a groove
Necessary for molding to form 14. Here, the lower part of the protruding edge 11a is referred to as part A.

The arm 20a of the cover 2b is formed of an elastic material, for example, a synthetic resin material having elasticity. A shaft 8b projects from one surface of a lower end of the arm 20a, and the portion A slides below the shaft 8b. The protrusions 16 are formed in an arc shape at a distance from each other. A central hole 17 is provided in the shaft portion 8b. (Center hole 17
Are necessary for molding to form the shaft portion 8b. )
The above configuration is provided symmetrically so as to oppose both sides of the housing 1b and the cover 2b, and the arm 20a of the cover 2b is
The dimensions are set so as to be inserted inside the side plate 10a.

FIG. 3 (c) is an overall side sectional view showing the cover.
2b shows a state where the cover 2b is mounted on the housing 1b and the cover 2b is closed by the hook 5a. When opening the cover 2b, the hook 5a is rotated in the direction of arrow C. Reference numeral 50 denotes a rotating shaft, and 51 denotes a spring.

With such a configuration, when the cover 2b is mounted on the housing 1b, the cover 2b is opened almost vertically, that is, as shown in FIG. When the shaft portion 8b is inserted from the step portion 13 and is slid downward from above the slope 12a, the arm 20a is bent by the height of the slope 12a, and when the shaft portion 8b comes to the position of the shaft hole 6b, the bending is eliminated and the fitting is performed. Combine. At this time, the protrusion 16 comes to a position where the protrusion 16 is abutted against the groove 14.

When the cover 2b starts to be closed, the shaft portion 8b rotates to the shaft hole 6b, the arm 20a rotates in the direction of arrow B, and the projection 16 enters the groove 14 below the portion A to cover the cover. Slide until 2b stops in the closed position.

FIG. 3B is a sectional view showing this state. The shaft portion 8b is fitted into the shaft hole 6b, the projection 16 of the arm 20a is pressed by the portion A, and the shaft portion 8b has a protruding edge. It is pressed against the upper side of the portion 11a to prevent it from falling off. As in the conventional example, this has a strength corresponding to the case where the cover 2b is pushed up by the spring. When the cover 2b is opened, a downward force is exerted by its own weight, so that it is sufficient to press the protruding edge 11a on the upper side to prevent the protruding edge 11a from coming off.

Since the shapes of the side plate 10a and the arm 20a in the above example are formed by, for example, injection molding, FIG.
(B) shows an example of the split mold of the side plate 10a and the arm 20a. In the figure, a indicates a slide portion, b indicates a core portion, and c indicates a cavity portion. (2) Embodiment Corresponding to Claim 2 An embodiment corresponding to claim 2 of the present invention will be described below with reference to FIG. The side plate 10b and the arm 20b in FIG. 5 correspond to the fixed plate 10 and the movable plate 20 in FIG. 1B, respectively.

As shown in FIGS. 5 (a) and 5 (b),
The side plate 10b of the housing 1c is formed of an elastic material, for example, a synthetic resin material having elasticity. A shaft hole 6b is provided at a lower end of a portion where the thickness of the side plate 10b is reduced, and a protruding edge 11a is formed on the outer periphery of the shaft hole 6b. Is formed, and a slope 12a is provided above the protruding edge 11a toward the surface of the side plate 10b.

Slits 18a and 18b having a predetermined length are provided in parallel upward from the left and right ends of the protruding edge 11a of the side plate 10b. The predetermined length is such that the protruding edge 11a is
It is set so that when pressed by 8b, the height of the shaft portion 8b is bent.

The lower portion of the protruding edge 11a is thicker, and a groove 14 including an arc-shaped notch is provided from the right side to the lower side in the drawing of the protruding edge 11a.
A through-hole 15 is formed in the lower part of.

The arm 20b of the cover 2c is made of, for example, a hard synthetic resin material.
Are protruded, and a projection 16 is formed in an arc shape below the shaft portion 8b with a width at which the portion A slides.

The above structure is provided symmetrically on both sides of the housing 1c and the cover 2c so as to face each other.
20b is inserted inside the side plate 10b of the housing 1c.

With this configuration, when the cover 2c is mounted on the housing 1c, the direction in which the cover 2c is opened, that is, the arm 20 is mounted, as in the embodiment described with reference to FIGS.
When the side b is turned sideways and slid downward from above the slope 12a, the portion of the side plate 10b surrounded by the slits 18a and 18b bends, the protruding edge 11a escapes, and the shaft 8b of the arm 20b eventually becomes the shaft hole 6b.
When it comes to the position, the bending is eliminated and the fitting is performed. At this time, the protrusion 16 comes to a position where the protrusion 16 is abutted against the groove 14.

When the cover 2c is closed, the shaft portion 8b is turned to the shaft hole 6b, and the arm 20b is turned, and the projection 16 is moved to the groove 14 below the portion A.
And slide until the cover 2c stops at the closed position. FIG. 6 shows another embodiment. FIG. 6 shows FIG.
5 is different from the embodiment described in FIG. 5 in that the side plate 10b and the arm 20b are provided on both sides of the housing 1c and the cover 2c so as to face each other. The arm is inserted so that the shaft portion is fitted into the shaft hole.

That is, as shown in FIGS. 6 (a) to 6 (d), a pair of side plates 10c, 10d and an arm 20c are provided, and the side plates 10c, 10d
5 is formed in the same manner as the side plate 10b of FIG. 5, and is provided with slopes 12b, 12c, steps 13a, 13b, shaft holes 6c, 6d, projecting edges 11b, 11c, grooves 14a, 14b, and slits 18c to 18f. , Are formed symmetrically opposite each other with an interval of the thickness of the arm 20c.
Shafts 8c, 8d and projections 16a, 16b are provided on both surfaces of 20c.

With such a configuration, the arm 20c
Sideways, and the steps 13a, 13b between the side plates 10c, 10d
The slopes 12b, 12c are pushed by the shaft portions 8c, 8d, and the slits 18c, 18d and the slits of the side plates 10c, 10d are respectively formed.
The portions surrounded by 18e and 18f are bent, and the shaft portions 8c and 8d are
Fits 6c, 6d.

When the arm 20c is rotated vertically, the shaft
8c and 8d rotate to the shaft hole 6b, and the projections 16a and 16b
Enter underneath. Thus, the arm 20c can be rotatably supported by the opposed side plates 10c and 10d.

In this manner, the shaft can be fitted into the shaft hole by the elasticity of the material of the side plate or the arm by using the slope, so that the number of parts is reduced and the assembly is extremely easy. it can.

[0033]

As described above, according to the present invention, a rotation fulcrum structure is realized by using only one of the fixed plate and the movable plate having the shaft hole and the shaft portion, utilizing the elasticity of one of the materials. Therefore, the number of parts is reduced, the assembly is extremely easy, the number of steps is reduced, and the cost can be improved.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a perspective view showing an embodiment corresponding to claim 1 of the present invention.

FIG. 3 is an explanatory view of an embodiment.

FIG. 4 is an explanatory view of a mold.

FIG. 5 is a perspective view showing an embodiment corresponding to claim 2 of the present invention.

FIG. 6 is a configuration diagram showing a different embodiment corresponding to claim 2;

FIG. 7 is a configuration diagram showing a conventional example.

[Explanation of symbols]

1,10 is a fixed plate, 1a-1c is a housing, 2,20 is a movable plate, 2a-2c is a cover, 6,6a-6d is a shaft hole,
8, 8a to 8d are shaft portions, 10a to 10d are side plates,
11,11a-11c are protruding edges, 12,12a-12c are slopes, 18,1
8a to 18f are slits, 20a to 20c are arms,

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-172009 (JP, A) JP-A-3-71686 (JP, U) JP-A-1-63178 (JP, U) JP-A-62-1 134283 (JP, U) Jikken 49-32763 (JP, Y1) British Patent Application Publication 2048658 (GB, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16C 11/04 B41J 29 / 13 E05D 7/081 H05K 5/03

Claims (2)

(57) [Claims] 1. It comprises a fixed plate (1) and a movable plate (2),
The fixing plate (1) has a shaft hole (6), and a ring-shaped protruding edge (11) having a predetermined height is provided on one surface on the outer periphery of the shaft hole (6), and the protruding edge (11) is provided. An inclined surface (12) is formed in a predetermined direction from the edge of the upper surface of the movable plate (2). Hole
(6) having a shaft portion (8) having a diameter that is rotatably fitted to the movable plate (2), and the shaft portion (8) of the movable plate (2) is attached to a slope (12) of the fixed plate (1). A rotating fulcrum structure characterized in that the movable plate (2) is bent by sliding, and the shaft portion (8) is fitted into the shaft hole (6). 2. It comprises a fixed plate (10) and a movable plate (20),
The fixing plate (10) is formed of an elastic material, and has a shaft hole (6).
A protruding edge (11) is provided in a ring shape having a predetermined height on one surface of the outer periphery of the shaft hole (6), and a slope (12) is formed in a predetermined direction from an edge of an upper surface of the protruding edge (11). And a plurality of slits (18) having a predetermined length are provided in the direction sandwiching the slope (12) from both opposing edges of the shaft hole (8), and the movable plate (20) is The shaft hole is formed to have a predetermined width and protrudes at a predetermined height on one surface of the tip.
(6) having a shaft portion (8) having a diameter that is rotatably fitted to the movable plate (6), and the shaft portion (8) of the movable plate (20) is attached to a slope (12) of the fixed plate (10). By sliding, the portion of the fixing plate (10) sandwiched between the plurality of slits (18) bends, and the shaft portion (8) is formed in the shaft hole.
(6) A rotation fulcrum structure characterized by having a configuration for fitting into (1).