JPH04236809A - Structure of rotation fulcrum - Google Patents

Abstract

PURPOSE:To obtain the structure of a rotation fulcrum which requires a small number of parts and can easily be assembled in the case of the rotation fulcrum which can be assembled by utilizing the elasticity of a member. CONSTITUTION:The rotation fulcrum in the claim 1 comprises a fixed plate and a movable plate. The fixed plate has a shaft hole, and on one side of the external peripheral surface of shaft the hole, a ring-like projected edge part of a specified height is provided. In addition, the fixed plate has a slant in the specified direction from the edge of the top surface of the projection edge part. On the other hand, the movable plate is made up of elastic material of a specified width and has a shaft which is projected on one face of the head part by a specified height and has a diameter enough to be capable of rotatably fitting in the shaft hole. The rotation fulcrum in the claim 2 comprises a fixed plate and movable plate. The fixed plate is made up of an elastic material and has a shaft hole, and a ring-like projection edge part of a specified height is provided on one face of the external periphery of the shaft hole. I addition, the fixed plate has a slant in the specified direction from the edge of the top surface of the projection edge part and is provided with a plurality of slits of the specified length in the direction for holding the slant from both edges of the shaft hole. On the other hand, the movable plate is formed in the specified width and has a shaft which is projected on one face of the head part by a specified height and has a diameter enough to be capable of rotatably fitting to the shaft hole.

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 open/close cover, and more particularly to a rotating fulcrum structure that can be assembled by utilizing the elasticity of members.

[0002] In recent years, various structures have been used for the hinges of the opening/closing covers of office machines such as printers, and the most common mechanism is a hinge, or a structure similar to this, with a round hole on one side and a hole on the other side. There are devices that use the attached shaft as a rotation fulcrum by fitting it into a round hole, but since additional parts are required to attach the parts, in order to reduce costs, we have developed a rotation fulcrum that has a small number of parts and is easy to assemble. structure is desired.

0003

[Prior Art] Figure 7 shows an example of an opening/closing cover used in an office machine, in which (a) is a front sectional view, (b) is a side view, and (c) is an exploded perspective view of the support part. .

In FIGS. 7(a) and (b), 1a
2a is a housing, 3 is a support portion, 4 is a spring, and 5 is a hook for locking the housing 1a and the cover 2a. The housing 1a and the cover 2a are rigid bodies, and support parts 3 are provided on both sides. As shown in FIG. 4(c), the supporting part 3 has holes 6a and 7 in the housing 1a and the cover 2a, respectively.
A cover 2a is placed inside the housing 1a, a support shaft 8a is passed through the holes 6a and 7, and the cover 2a is fixed with a screw 9.

With this configuration, the hook 5 is normally hooked to the housing 1a, and when the hook 5 is removed, the spring 4 causes the cover 2a to rotate about the support shaft 8a and open.

[0006]

[Problems to be Solved by the Invention] According to the above conventional method, the parts constituting the rotation fulcrum require a support shaft, screws, etc., and the number of parts is large. The problem is that the spindle must be inserted into the shaft, making it difficult to work and requiring a lot of man-hours.

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

[0008]

[Means for Solving the Problems] Fig. 1 is a diagram showing the principle of the present invention, in which (a) is a perspective view corresponding to claim 1, and (b) is a perspective view corresponding to claim 2. (1) Means corresponding to claim 1 In Fig. 1(a), 6 is a shaft hole, 8 is a shaft portion, 11 is a protruding edge, 1 has a shaft hole 6, and one side of the outer periphery of the shaft hole 6 is A fixed plate provided with a ring-shaped protruding edge 11 of a predetermined height, and a slope 12 formed in a predetermined direction from the upper edge of the protruding edge 11;
A movable plate 2 is made of an elastic material and has a predetermined width, and has a shaft portion 8 having a diameter that protrudes from one side of the distal end at a predetermined height and rotatably fits into the shaft hole 6.

Therefore, by sliding the shaft portion 8 of the movable plate 2 onto the slope 12 of the fixed plate 1, the movable plate 2 is bent and the shaft portion 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, 18 is a slit, 10 is formed of an elastic material, and the shaft hole 6 A ring-shaped protruding edge 11 of a predetermined height is provided on one side of the outer periphery of the shaft hole 6, and a slope 12 is formed in a predetermined direction from the upper edge of the protruding edge 11. A fixed plate 20 is provided with a plurality of slits 18 each having a predetermined length in a direction sandwiching the slope 12 from both edges, and is formed to have a predetermined width, protrudes from one side of the tip at a predetermined height, and is rotatable into the shaft hole 6. It is a movable plate having a shaft portion 8 with a diameter that fits.

Therefore, by sliding the shaft portion 8 of the movable plate 20 onto the slope 12 of the fixed plate 10, the portion sandwiched between the plurality of slits 18 of the fixed plate 10 is bent, and the shaft portion 8 is fitted into the shaft hole 6. It is configured as follows.

[0011]

[Function] (1) Effect corresponding to claim 1 When the fixed plate 1 and the movable plate 2 are overlapped, the shaft portion 8 at the tip of the movable plate 2 is attached to the fixed plate 1.
When the movable plate 2 bends due to its elasticity and the protruding edge 11 escapes, and the shaft portion 8 reaches the shaft hole 6, the shaft portion 8 is inserted into the shaft hole 6 due to the restoring force of the elasticity. Fit together. Therefore, by simply forming the shaft hole 6, the protruding edge 11, and the slope 12 on the fixed plate 1, and forming the shaft portion 8 on the movable plate 2, no other attachment parts are required, and the assembly can be easily performed. (2) Effect according to claim 2 When the fixed plate 1 and the movable plate 2 are overlapped and the shaft portion 8 at the tip of the movable plate 2 is applied to the slope 12 of the fixed plate 1 and slid, the fixed plate 10 is moved by elasticity. When the portion sandwiched between the slits 18 is bent and a part of the protruding edge 11 escapes, and the shaft portion 8 reaches the shaft hole 6, the shaft portion 8 is fitted into the shaft hole 6 due to the elastic restoring force. Therefore, by simply forming the shaft hole 6, protruding edge 11, slope 12, and slit 18 on the fixed plate 1, and forming the shaft portion 8 on the movable plate 2, no other attachment parts are required, and assembly is easy. I can do it.

0012

Embodiments (1) An embodiment corresponding to claim 1 Hereinafter, an embodiment corresponding to claim 1 of the present invention will be described with reference to FIGS. 2 to 4. The same reference numerals indicate the same objects throughout the figures.

FIG. 2 shows an embodiment in which the present invention is applied to a rotational fulcrum similar to the support described in the conventional example. Side plate 1 in Figure 2
0a and arm 20a correspond to fixed plate 1 and movable plate 2 in FIG. 1(a), respectively.

FIGS. 2(a) and 2(b) show perspective views of the left and right rotational supports, and as shown in the figures, the side plate 10a of the housing 1b is made of a hard synthetic resin material.
A shaft hole 6b is provided at the lower end of the thinned part of a,
A protruding edge 11a is formed on the outer periphery of the shaft hole 6b, and a slope 12a is provided above the protruding edge 11a toward the surface of the side plate 10a. A stepped portion 13 large enough to allow a shaft portion 8b of an arm 20a (described later) to enter is provided in the thick portion on the left side of the side plate 10a above the slope 12a.

The lower part of the protruding edge 11a is thicker, and a groove 14 including an arcuate notch is provided from the right side to the lower side of the protruding edge 11a in the figure. A through hole 15 is formed in the lower part of. (
The through hole 15 is necessary for molding to form the groove 14. ) Here, the lower part of the protruding edge 11a is referred to as part A.

The arm 20a of the cover 2b is made of an elastic material, for example, an elastic synthetic resin material.
A shaft portion 8b protrudes from one side of the lower end portion, and an arcuate protrusion 16 is formed below the shaft portion 8b with a width over which the portion A slides. A center hole 17 is provided in the shaft portion 8b. (The center hole 17 is necessary for molding to form the shaft portion 8b.) The above-mentioned structure is formed symmetrically and provided on both sides of the housing 1b and the cover 2b, and the arm 20a of the cover 2b is provided. The dimensions are set so that it can be inserted inside the side plate 10a of the housing 1b.

FIG. 3(c) is a side sectional view of the whole, showing a state in which the cover 2b is attached to the housing 1b and is closed by the hook 5a. When opening the cover 2b, the hook 5a is rotated in the direction of arrow C. 50 is a rotating shaft, and 51 is a spring.

With this configuration, when attaching the cover 2b to the housing 1b, the cover 2b should be opened almost vertically, that is, the arm 20a should be oriented horizontally as shown in FIG. 3(a). When the shaft portion 8b is inserted from the stepped portion 13 and slid downward from the top of the slope 12a, the arm 20a is moved to the slope 1.
The shaft portion 8b is bent by a height of 2a, and when the shaft portion 8b comes to the position of the shaft hole 6b, the bending is canceled and the shaft portion 8b is fitted. At this time, the protrusion 16
comes to a position where it abuts against the groove portion 14.

Furthermore, when the cover 2b begins to close, the shaft portion 8b
rotates into the shaft hole 6b, the arm 20a rotates in the direction of arrow B, and the protrusion 16 enters the groove 14 under the section A, and the cover 2
Slide b until it stops at the closed position.

FIG. 3(b) shows a cross-sectional view of this state, in which the shaft portion 8b is fitted into the shaft hole 6b, the protrusion 16 of the arm 20a is pressed by the portion A, and the shaft portion 8b is pressed against the protruding edge. Part 11a
It is pressed against the upper side of the holder to prevent it from coming off. Similar to the conventional example, this is provided with strength in response to the case where the cover 2b is pushed up by the spring. When the cover 2b is opened, a downward force is exerted due to its own weight, so it is sufficient to press the upper side of the protruding edge 11a to prevent it from coming off.

The shapes of the side plate 10a and the arm 20a in the above example are formed by, for example, injection molding, so the shapes shown in FIG.
a) and (b) show examples of split molds for 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) Example corresponding to claim 2 An example corresponding to claim 2 of the present invention will be described below with reference to FIG. The side plate 10b and arm 20b in FIG. 5 correspond to the fixed plate 10 and movable plate 20 in FIG. 1(b), respectively.

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

Slits 18a, 18 of a predetermined length are formed in parallel upward direction from both left and right end positions of the protruding edge 11a of the side plate 10b.
b is provided. The predetermined length is set so that when the protruding edge 11a is pushed by the shaft 8b, which will be described next, it will be deflected to the same height as the shaft 8b.

The lower part of the protruding edge 11a is thicker, and a groove 14 including an arcuate notch is provided from the right side to the lower side of the protruding edge 11a in the figure. 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, and a shaft portion 8b protrudes from one side of the lower end of the arm 20b. A protrusion 16 is formed in an arc shape.

[0026] The above-mentioned structure is provided symmetrically to face each other on both sides of the housing 1c and the cover 2c, and the arm 20b of the cover 2c is inserted into the inside of the side plate 10b of the housing 1c.

With this configuration, the cover 2 is attached to the housing 1c, similar to the embodiment described in FIGS. 2 and 3.
When attaching the cover 2c, when the cover 2c is opened, that is, the arm 20b is turned sideways and it is slid downward from the top of the slope 12a, the part surrounded by the slits 18a and 18b of the side plate 10b is bent, and the protruding edge When the portion 11a escapes and the shaft portion 8b of the arm 20b comes to the position of the shaft hole 6b, the bending is canceled and the two are fitted together. At this time, the protrusion 16 comes to a position where it abuts against the groove 14.

When the cover 2c is closed, the shaft portion 8b is inserted into the shaft hole 6.
b, the arm 20b rotates, and the protrusion 16 slides until it enters the groove 14 under part A and stops at the closed position of the cover 2c. Further, FIG. 6 shows a different embodiment. The difference between FIG. 6 and the embodiment explained in FIG. 5 is that in FIG. 5, side plates 10b and arms 20b are provided facing each other on both sides of the casing 1c and the cover 2c, whereas in FIG. The arm is inserted between the opposing side plates and the shaft portion is fitted into the shaft hole.

That is, as shown in FIGS. 6(a) to 6(d), it is composed of a pair of side plates 10c, 10d and an arm 20c, and the side plates 10c, 10d are formed in the same manner as the side plate 10b in FIG. 12b, 12c, stepped portions 13a, 13
b, shaft holes 6c, 6d, protruding edges 11b, 11c, groove 1
4a, 14b, and slits 18c to 18f, which are formed symmetrically to face each other at intervals of approximately the thickness of the arm 20c, and shaft portions 8c, 8d on both sides of the arm 20c.
and protrusions 16a, 16b are provided.

With such a configuration, the arm 20
c is placed horizontally and inserted into the step portions 13a, 13b between the side plates 10c, 10d, and the slopes 12b, 12c are pushed by the shaft portions 8c, 8d, and the side plates 10c, 10
d slits 18c, 18d and slit 18, respectively.
The part surrounded by e and 18f is bent, and the shaft parts 8c and 8d
are fitted into the shaft holes 6c and 6d, respectively.

When the arm 20c is rotated vertically, the shaft portions 8c, 8d are rotated into the shaft hole 6b, and the projections 16a, 1
6b enters the lower side of the grooves 14a and 14b. Thus, the arm 20c can be rotatably supported by the opposing side plates 10c and 10d.

[0032] In this way, the shaft portion can be fitted into the shaft hole by utilizing the slope and the elasticity of the material of the side plate or arm, so the number of parts can be reduced and assembly can be made extremely easy. can.

[0033]

[Effects of the Invention] As explained above, according to the present invention, a rotating fulcrum structure can be realized by using only the fixed plate and the movable plate in which shaft holes and shaft portions are formed, and by utilizing the elasticity of one of the materials. As a result, the number of parts can be reduced, assembly can be made extremely easy, the number of man-hours can be reduced, and costs can be improved.

[Brief explanation of the drawing]

[Figure 1] Principle diagram of the present invention

[Fig. 2] A perspective view showing an embodiment corresponding to claim 1 of the present invention.

[Figure 3] Explanatory diagram of the example

[Figure 4] Explanatory diagram of the mold

[Fig. 5] A perspective view showing an embodiment corresponding to claim 2 of the present invention.

[Fig. 6] A configuration diagram showing a different embodiment corresponding to claim 2.

[Figure 7] Block diagram showing a conventional example

[Explanation of symbols]

Claims (2)

[Claims] Claim 1: Consisting of a fixed plate (1) and a movable plate (2), the fixed plate (1) has a shaft hole (6), and a predetermined height is provided on one side of the outer periphery of the shaft hole (6). A ring-shaped protruding edge (11) is provided, and a slope (12) is formed in a predetermined direction from the upper edge of the protruding edge (11), and the movable plate (2) has elasticity. It is made of material and has a predetermined width, and has a shaft portion (8) of a diameter that protrudes from one side of the distal end at a predetermined height and rotatably fits into the shaft hole (6), and the movable plate (2 ) to the fixing plate (1).
) by sliding it on the slope (12) of the movable plate (2).
) is bent so that the shaft portion (8) fits into the shaft hole (6). 2. Consisting of a fixed plate (10) and a movable plate (20), the fixed plate (10) is made of an elastic material, and has a shaft hole (6). A ring-shaped projecting edge (11) of a predetermined height is provided on one side of the outer periphery of the projecting edge (11).
), and a plurality of slits (of predetermined lengths) are formed from opposite edges of the shaft hole (8) in a direction sandwiching the slope (12).
The movable plate (20) is formed with a predetermined width, and protrudes at a predetermined height from one side of the distal end and has a shaft hole (
6) has a shaft portion (8) having a diameter that rotatably fits into the movable plate (20), and the shaft portion (8) of the movable plate (20) is slid onto the slope (12) of the fixed plate (10). When the fixing plate (10) is bent, the portion sandwiched between the plurality of slits (18) is bent, and the shaft portion (8) is fitted into the shaft hole (6). Rotating fulcrum structure.