JP4328517B2 - Swivel control mechanism of movable body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a swivel suppressing mechanism that does not require lubrication and grease application and has high durability, and relates to a swivel suppressing mechanism for a movable body such as an open / close lid of various containers or a liquid crystal display stand of a desktop personal computer.
[0002]
[Prior art]
In general passenger cars, various swiveling mechanisms are installed on glove box cover plates, sun visors, car navigators, in-vehicle TVs, etc., so that movable bodies such as opening / closing lids and LCD display units can be swung to a predetermined position. is doing. In addition, there are many movable bodies with open / close lids in general homes and companies, such as copiers and scanner open / close lids, electronic organ and piano keyboard lids and back lids, and writing desk front plates. Can be illustrated. These movable bodies can be rotated in the vertical direction by a turning mechanism such as a hinge or a rotating metal fitting. These swiveling mechanisms can freely rotate in either the up / down, left / right, or open / close directions, so when closing the lid, the fingers may get injured, or the lid may suddenly descend to remove the product. May be damaged.
[0003]
Instead of the above-described turning mechanism, the turning suppression mechanism appropriately suppresses the turning of the movable body, thereby preventing the movable body such as the opening / closing lid from turning suddenly and causing an accident. As this turning suppression mechanism, a mechanism is generally used in which a rotating shaft of a movable body is inserted into a through-hole of an apparatus body, and a nut is strongly tightened to the rotating shaft via a washer and several disc springs. In this turning suppression mechanism, the side wall surface and the washer surface of the device main body are friction surfaces, and the rotation of the movable body is strongly suppressed by the elasticity of several disc springs. Regular lubrication or grease application is required on the friction surface to maintain the swivel operation.
[0004]
[Problems to be solved by the invention]
Periodic lubrication and grease application with the above-mentioned swivel suppression mechanism is a cumbersome work, and even if such regular maintenance work is performed, the contact portion is worn by a strong spring elasticity, resulting in a wear residue and a movable body The swivel operation becomes difficult. The present inventor has already proposed a turning restraining mechanism in Japanese Patent Publication No. 7-59427 and Japanese Patent No. 2650149, and these turning restraining mechanisms appropriately brake the upper and lower turning directions so that the lid body However, there is an advantage that the size of the mechanism is slightly long and the structure is somewhat complicated, and the user cannot meet the demand for cost reduction. Patent No. 2770297 is popular because it has a simple structure and can properly adjust the opening and closing operation of the lid. However, it is light in weight such as a notebook computer display, a digital camera, and a liquid crystal display unit for video. Even if the movable body can be used, when the opening / closing operation of the relatively large and heavy movable body is suppressed, the movable body cannot be simply enlarged according to the load of the movable body.
[0005]
As a result of repeated investigations on the restraining device for movable bodies that are somewhat heavy, the present invention supports tens of thousands of swiveling tests with relatively heavy movable bodies by preventing pressure deformation and thermal expansion of plastic braking members. An object of the present invention is to propose a turning restraining mechanism that has high durability and that has a simple structure and low manufacturing costs. Another object of the present invention is to provide a swivel suppression mechanism that eliminates periodic maintenance work by eliminating the need for lubrication and grease application.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a turning suppression mechanism according to the present invention includes a rotating shaft attached to an apparatus main body, a movable body provided with a through hole into which the rotating shaft is fitted, and a concentric arrangement with the through hole. A holding ring fixed to the movable body, a wear-resistant engineering plastic braking member fitted in the holding ring, and a washer that contacts the braking member and rotates or stops together with the rotating shaft. In this turning suppression mechanism, when the movable body is turned by tightening the entire mechanism, the side surface of the braking member and the side surface of the washer become friction surfaces. Further, when the brake member is fitted in the holding ring, the holding ring prevents the brake member from being deformed outward.
[0007]
In the turning suppression mechanism according to the present invention, it is possible to dispose braking members on both side surfaces of the movable body. Therefore, the turning suppression mechanism is fixed to both surfaces of the plate-like movable body by being arranged concentrically with the rotating shaft attached to the apparatus body, the movable body provided with the through-hole into which the rotational shaft is fitted, and the through-hole. Two retaining rings, two braking members fitted in each retaining ring, and two washers that are in contact with each braking member and rotate and stop together with the rotating shaft. In this turning suppression mechanism, when the movable body is turned by tightening the whole mechanism via a disc spring, the side surface of each braking member and the side surface of the washer become friction surfaces.
[0008]
In the turning restraining mechanism of the present invention, it is preferable that a rotation-preventing protrusion is formed on the outer peripheral surface or the side surface of the braking member, whereby the braking member rotates or stops together with the movable body. The outer diameter of the washer that contacts the brake member is slightly smaller than the inner diameter of the retaining ring, and the washer can enter the retaining ring when the entire mechanism is tightened.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 3 and 4, the turning suppression mechanism 1 according to the present invention includes a braking member 22 that operates integrally with the movable body, that is, the extension portion 14, and a washer 26 that operates integrally with the apparatus body, that is, the rotating shaft 10. And a retaining ring 18 is disposed over the entire periphery of the braking member. For this reason, the plastic braking member 22 has an inner surface that is in contact with the extension 14 and is completely surrounded by the metal retaining ring 18 and the washer 26, and there is room for deformation or expansion even under pressure and heating. Absent. Each of the braking member 22 and the washer 26 is a donut-shaped disk, and the friction surface between the braking member 22 and the washer 26 is flat and wear residue is less likely to occur. Moreover, since the braking member 22 is made of wear-resistant engineering plastic, the turning suppression mechanism 1 can be used for a long time.
[0010]
3 and 4, the braking members 22 and 24 are disposed on both sides of the extension portion 14, but a configuration in which the braking members are disposed only on one side is also possible. You may support the both ends of the rotating shaft 10 with a fixed plate, and may insert the two extension parts 14 in one rotating shaft. Further, two or more disc springs 30 may be used, or may be fastened by caulking instead of the nut 32.
[0011]
In the turning suppression mechanism 1, the outer diameters of the braking member 22 and the washer 26 are equal and can be manufactured if the diameter is 7 to 8 mm or more. After the braking member 22 and the washer 26 are fitted in the holding ring 18 of the extension portion 14, the entire rotation suppression mechanism 1 is tightened, whereby the side surface of the braking member 22 and the side surface of the washer 26 become friction surfaces, and the extension portion 14 can be stopped at any rotational position.
[0012]
The retaining ring 18 may be formed by spot welding a ring-shaped metal material to the extension portion 14 or forming a ring by metal cutting. The inner diameter of the holding ring 18 is slightly larger than the outer diameters of the braking member 22 and the washer 26, and the thickness of the holding ring is larger than the thickness of the braking member 22.
[0013]
The braking members 22 and 24 need to be provided with a rotation preventing member in the extension portion 14 of the movable body so as not to idle together with the washer. As an example, a side protrusion 38 (FIG. 7) or a peripheral protrusion 44 (FIG. 8) is formed on the braking member, while a recess 40 (FIG. 6) is formed on the extension 14 or a recess 48 (FIG. 8) is provided. Further, a pin penetrating the braking member 22 and the extension 14 may be attached, or the outer peripheral surface of the braking member and the inner peripheral surface of the holding ring may be non-circular planes such as an ellipse or a rectangle. The extension 14 may be integrated.
[0014]
Devices having a movable body to which the turning suppression mechanism 1 is attached include, for example, a car navigation device 2 (FIG. 1), a writing desk 5 (FIG. 2), a copier or scanner having an open / close lid, a liquid crystal display stand of a desktop personal computer, a laptop PCs, space-saving desktop PCs, car glove boxes, sun visors, and in-vehicle TVs. For home use, for example, it can be applied to a toilet seat 52 of a Western-style toilet 50 as shown in FIG. 9. In this case, a pair of turning suppression mechanisms 54 are installed.
[0015]
【Example】
The present invention will be described with reference to the drawings, but the present invention is not limited to the examples. 1 and 2 exemplify a movable body and a device main body to which the turning suppression mechanism 1 (FIG. 3) according to the present invention can be applied. FIG. 1 shows a car navigation device 2 installed in an automobile, in which a movable body 3 of a turning suppression mechanism is a liquid crystal display display unit, and an apparatus main body 4 is a stand main body installed on a dashboard. FIG. 2 shows a commercially available writing desk 5, in which the movable body 6 of the turning suppression mechanism is a front plate and the device body 7 is a desk body.
[0016]
As illustrated in FIGS. 3 and 4, the turning suppression mechanism 1 has a rotating shaft 10 that is fixed to a fixed plate 8 of the apparatus body horizontally by caulking. The rotating shaft 10 is a non-circular shaft in which a male thread 12 is engraved in the front portion and both sides 13 and 13 of the peripheral surface are cut in parallel along the axial direction as is apparent from FIG. In the turning suppression mechanism 1, the extension 14 of the movable body is arranged, and the rotating shaft 10 is inserted into the circular through hole 16 (FIG. 6) of the extension. The shape and dimensions of the fixed plate 8 and the extension 14 are appropriately changed according to the device main body and the movable body, so that both ends of the rotating shaft are supported, or two extensions are separated and attached to one rotating shaft. It is also possible to do.
[0017]
The rotation suppression mechanism 1 is further arranged concentrically with the through-hole 16 and fixed to both surfaces of the plate-like extension 14, and a braking member 22 fitted in each holding ring 18, 20. , 24, washers 26, 28 in contact with the respective braking members, at least one disc spring 30, and a nut 32. The washer 26, 28 is provided with a non-circular through hole 33 (FIG. 5) corresponding to the non-circular cross section of the rotary shaft 10. The braking members 22 and 24 are provided with a circular through hole 36 (FIG. 7) that can be inserted into the rotary shaft 10, and this has the same diameter as the through hole 16.
[0018]
For example, a sleep 34 and circular plates 35 and 35 are fitted on the rotary shaft 10 for proper isolation. Next, the second washer 28, the second braking member 24, the movable body extension 14, the first braking member 22, and the first washer 26 are sequentially fitted on the rotary shaft 10, and further, the nut 32 is interposed via the disc spring 30. Fasten with. In FIG. 3, washers 26 and 28 are made of hard metal, while braking members 22 and 24 are preferably injection molded products of wear resistant engineering plastics such as carbon-containing polyacetal resin.
[0019]
The holding rings 18 and 20 are usually of the same shape, are arranged concentrically with the through-hole 16 on both surfaces of the extension 14 of the movable body, and are fixed to the extension 14 by spot welding or the like (see FIG. 6). The inner diameter of the retaining ring 18 is slightly larger than the outer diameter of the braking members 22 and 24. Further, the thickness of the holding ring 18 is larger than the thickness of the braking members 22 and 24.
[0020]
The braking members 22 and 24 are usually donut-shaped discs having the same shape and flat sides. The rotary shaft 10 can be rotatably fitted in the center hole 36 of the braking member 22. When the braking member 22 is fitted to the holding ring 18, the center hole 36 matches the through hole 16 of the extension 14. The brake member 22 is formed with a pair of anti-rotation protrusions 38 and 38 (FIG. 7) on the side surface on the extension portion 14 side so that the brake member 22 can be reliably rotated and stopped together with the extension portion 14. Recesses 40, 40 (FIG. 6) are provided on the corresponding side surfaces of the fourteen. When the entire turning suppression mechanism 1 is tightened, the projections 38 and 38 are fitted into the recesses 40 and 40, respectively.
[0021]
Washers 26 and 28 are generally donut-shaped disks having the same shape and flat sides. The central hole of the washer 28 is a non-circular through-hole 33. When the washer 28 is fitted to the rotary shaft 10, it rotates and stops together with the rotary shaft. The washer 28 has substantially the same outer diameter as the braking member 24 and can be fitted to the retaining ring 18.
[0022]
FIG. 8 shows another braking member 42. In this braking member, instead of the projections 38, 38, 2 to 6 projections 44 are provided at equal intervals on the peripheral surface, and the holding ring 46 is arranged according to each projection 44. It is necessary to form the recess 48 on the inner peripheral surface of the. By having the protrusion 44 and the recess 48, the braking member 42 always rotates and stops together with the extension of the movable body.
[0023]
When the turning suppression mechanism 1 is assembled and tightened with the nut 32, the brake members 22 and 24 are elastically pressed by the washer 26 and 28 by the disc spring 30, and both enter the holding ring 18 or 20. At this time, the protrusions 38 and 38 of the braking members 22 and 24 are fitted into the recesses 40 and 40 of the extension 14, and the braking member rotates together with the extension 14 of the movable body. On the other hand, the washers 26 and 28 are stationary together with the rotating shaft 10, that is, the fixed plate 8 of the apparatus body, by having the non-circular through hole 33.
[0024]
Even if all the necessary members are added, the turning suppression mechanism 1 is only about 10 mm thick, and rotates by bringing the braking members 22 and 24 made of plastic into contact with the washers 26 and 28 and tightening the entire mechanism. The side surface of the braking member 22 and the side surface of the stationary washer 26 become friction surfaces, and the extension portion 14 of the movable body can be stationary at an arbitrary rotational position. The turning suppression mechanism 1 receives a load of about 50 kg which acts when the movable body is rotated on the side surfaces of both braking members and the side surfaces of both washers. Since the braking members 22 and 24 made of plastic are closely surrounded by the retaining ring 18 or 20, the plastic braking members 22 and 24 are long without being deformed or damaged outwardly even when a continuous pressing force or heat is applied. It can be used stably for a period of time and easily withstands tens of thousands of swivel tests.
[0025]
In the car navigation device 2 of FIG. 1, when the movable body 3 of the liquid crystal display unit is rotated, the braking members 22 and 24 are rotated through the extension 14 attached to the movable body, and the liquid crystal display unit is displayed. It can be brought down from the plane of FIG. In addition, when the rotation suppression mechanism is configured such that the rotation shaft 10 is arranged in a direction perpendicular to the liquid crystal display unit, the screen of the liquid crystal display unit can be rotated 360 degrees.
[0026]
【The invention's effect】
In the turning suppression mechanism according to the present invention, the outer periphery of the plastic braking member is in close contact with the inner peripheral surface of the holding ring, and the outer peripheral image of the braking member is tightly surrounded by the holding ring. For this reason, even if a continuous pressing force or heat is applied to the braking member, the turning suppression mechanism can be used stably for a long period of time without the braking member being deformed or damaged outward. This turning suppression mechanism brakes the movable body in any of the upper and lower turning directions as appropriate, prevents sudden turning of the movable body, has a relatively thin overall structure, and has a simple structure. It is possible to appropriately respond to the demand for cost reduction.
[0027]
In the swivel suppression mechanism of the present invention, even if the operation such as lubrication or grease application is omitted, no seizure occurs as in the conventional metal mechanism, and there is no weakness as in the conventional plastic hinge. . Therefore, the turning restraining mechanism of the present invention is advantageous in terms of manufacturing cost and running cost, and withstands a load of up to about 50 kg which acts when the movable body is rotated, thereby enabling various fields such as the passenger car field. It is possible to apply to.
[0028]
Further, in the turning suppression mechanism of the present invention, the friction surface between the braking member and the washer is flat, and even if the turning frequency of the movable body is high, no wear residue is generated at the contact portion, and it can be moved even when used for a long time. The turning action of the body is always constant. The braking member of the turning suppression mechanism can easily withstand tens of thousands of turning tests.
[Brief description of the drawings]
FIG. 1 is a front view showing an application example of a turning suppression mechanism of the present invention.
FIG. 2 is a perspective view showing another application example of the turning suppression mechanism.
FIG. 3 is a side view showing an example of a turning restraining mechanism according to the present invention, and shows an extension of the movable body in cross section.
FIG. 4 is an exploded side view showing a turning restraining mechanism of the present invention, and a part thereof is shown in cross section.
5 is a cross-sectional view taken along line AA in FIG.
6 is an end view of the extension shown along BB in FIG. 4; FIG.
7 is a perspective view of a braking member that can be adapted to the extension of FIG. 6;
FIG. 8 is a front view showing a state in which another braking member is fitted into the holding ring.
FIG. 9 is a plan view showing another application example of the turning suppression mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotation suppression mechanism 8 Fixing plate 10 of apparatus main body Rotating shaft 12 Male thread 14 Movable body extensions 18, 20 Retaining rings 22, 24 Braking members 26, 28 Washers 30 Belleville spring 32 Nut

Claims (2)

A rotating shaft to be attached to the device body, a movable body provided with a through-hole into which the rotating shaft is fitted, and two holding members that are arranged concentrically with the through-hole and are respectively formed or fixed on both surfaces of the plate-like movable body A ring, two brake members made of wear-resistant engineering plastic that fit into each holding ring, and two hard metal washers that are in contact with each brake member and rotate and stop together with the rotating shaft. The retaining ring has a circular cross section on the inner surface, the inner diameter is slightly larger than the outer diameter of the braking member and the washer, the washer has substantially the same outer diameter as the braking member, and the thickness of the retaining ring is the braking member The width of the brake member and the thickness of the washer are less than the width of the brake member, and the width of the brake member and the washer There becomes friction surface, by the braking member is pressed by the washer it fits into the retaining ring, swivel suppression mechanism for preventing the deformation of the outward brake member by the retaining ring.    By forming a protrusion for preventing rotation on the outer peripheral surface or side surface of the brake member, the brake member rotates or stops together with the movable body, and the outer diameter of the washer contacting the brake member is larger than the inner diameter of the holding ring. The turning suppression mechanism according to claim 1, wherein the washer enters the holding ring when the entire mechanism is tightened.

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