JPH0738774U - Rotating damper - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to mechanically brake the rotation of a rotor without using a viscous fluid such as oil or grease. [Structure] A braking plate portion 3-1 of the rotor 3 for braking the rotation of the rotor 3 by a braking member 5 is formed in a disk shape slightly smaller than the inner diameter of the dish-shaped housing 1, while the braking member 5 is a spring. Between the braking plate part 3-1 and the lower plate 1-1 of the dish-shaped housing 1 and between the braking plate part 3-1 and the top plate 4-2 of the cap 4 with the material.
It is formed into a thin corrugated shape having a height interposed between each of them in a pressure contact manner, and between the lower plate 1-1 of the dish-shaped housing 1 and the braking plate part 3-1 and the top plate 4-of the cap 4. 2 and the brake plate portion 3-1 which rotates on the lower plate 1-1 of the dish-shaped housing 1 and the rotary shaft which stands up from the center of the brake plate portion 3-1 by interposing each in a pressure contact state with The rotation of the rotor 3 including the part 3-2 is mechanically braked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary damper which is used for a cassette lid, a knob lid of a television and other rotating parts, and a sliding part for braking their rotation.

[0002]

[Prior art and its problems]

 Conventionally, as this type of rotary damper, for example, one disclosed in Japanese Patent Laid-Open No. 5-52232 is known. By the way, since this conventional rotary damper uses a viscous fluid such as oil or grease as a braking member for braking the rotation of the rotary shaft, the viscosity of the viscous fluid inside the dish-shaped housing changes due to rotation resistance and aging. The fluid may leak out from the outer wall of the housing and the cap.

Therefore, conventionally, in order to prevent the viscous granules from leaking to the outside, it was necessary to fix the dish-shaped housing and the cap by high frequency welding to completely seal the viscous fluid inside the dish-shaped housing. Therefore, the conventional rotary damper takes time and effort to manufacture, which has been an obstacle such as an increase in cost.

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of such conventional circumstances, and provides a newly improved rotary damper that can mechanically brake the rotation of a rotor without using a viscous fluid such as oil or grease. The purpose is to do.

[0005]

[Means for achieving the object]

 The technical means taken by the present invention to achieve the above-mentioned object are a dish-shaped housing, a braking plate portion which rotates on a supporting portion projecting from a lower plate center of the dish-shaped housing, and a center of the braking plate portion. A rotor composed of a rotating shaft portion standing upright from above, a cap that closes the inside of the dish-shaped housing from above, and a pair of upper and lower braking members that are internal to the dish-shaped housing and that sandwich the braking plate portion from above and below. The braking plate is formed in a disk shape slightly smaller than the inner diameter of the dish-shaped housing, while the braking member is formed by a spring member between the braking plate and the lower plate of the dish-shaped housing and the braking is performed. The gist is that it is formed in a thin-walled corrugated shape having a height that is interposed between the plate and the top of the cap in a pressure-contacting manner.

A rotor including a dish-shaped housing, a braking plate portion that rotates on a support portion that projects from the center of the lower plate of the dish-shaped housing, and a rotating shaft portion that stands up from the center of the braking plate portion. A cap that closes the inside of the dish-shaped housing from above, and a pair of upper and lower braking members that are located inside the dish-shaped housing and clamp the braking plate section from above and below. The disk-shaped housing is formed to project in a disk shape slightly smaller than the inner diameter of the housing, and the braking member is made of soft rubber or thermoplastic and is provided at least between the damping plate portion and the lower plate of the dish-shaped housing and between the damping plate portion and the cap. The gist is that it is formed in the shape of a ring disk having a thickness such that it can be pressed into contact with each roof.

[0007]

[Work]

 Thus, according to the above-mentioned technical means according to the first aspect of the present invention, the braking plate portion projecting inwardly in the disk-shaped housing is formed into a thin-walled wave shape by using the spring material. Since the formed braking member is pressed and clamped from above and below, frictional resistance is generated by the pressing force (spring force) of the braking member against the braking plate when the rotor rotates, and the rotation of the rotor is braked.

According to the technical means of the second aspect, the braking plate portion, which protrudes and is present in the disk-shaped housing in the shape of a disk, is formed in the shape of a ring disk using soft rubber or thermoplastics. By sandwiching the members from above and below under pressure, frictional resistance is generated by the pressure contact force of the braking member against the braking plate when the rotor rotates, and the rotation of the rotor is braked.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 show a rotary damper according to claim 1, wherein the rotary damper is a dish-shaped housing 1 and a circular lower plate of the dish-shaped housing 1. A rotor 3 composed of a braking plate portion 3-1 which rotates on a support portion 2 protruding from the center of 1-1, and a rotating shaft portion 3-2 which stands up from the center of the braking plate portion 3-1; It is composed of a cap 4 that closes the inside of the dish-shaped housing 1 from above, and a pair of upper and lower braking members 5 that are located inside the dish-shaped housing 1 and that sandwich the braking plate portion 3-1 from above and below. The rotation of the rotor 3 is braked by the pressure contact force from above and below against the braking plate portion 3-1 of 5.

As is well known, the dish-shaped housing 1, the rotor 3, and the cap 4 are integrally molded products made of a desired material such as plastic, and the outer peripheral rising wall 1-2 of the dish-shaped housing 1 and the outer periphery of the cap 4 are formed. Engagement irregularities 6 are provided on the hanging wall 4-1 so as to be closely fixed to each other by a fitting or screwing method. The braking plate portion 3-1 is formed in a disk shape slightly smaller than the inner diameter of the outer peripheral rising wall 1-2 of the dish-shaped housing 1 so as to project from the outer periphery of the rotary shaft portion 3-2, and the braking plate portion 3-1 of the dish-shaped housing 1 is formed. The braking member 5 can be interposed between the lower plate 1-1 and the top plate 4-2 of the cap 4.

The pair of upper and lower braking members 5 are provided between the braking plate portion 3-1 of the rotor 3 and the lower plate 1-1 of the dish-shaped housing 1 and between the braking plate portion 3-1 and the roof 4-2 of the cap 4. And the braking plate portion 3-1 is sandwiched by a constant pressure contact force from above and below to brake the rotation of the rotor 3, and a thin spring material made of plastic is used. As shown in the drawing, from the center portion having the fitting insertion holes 7 into which the protruding base portion of the rotating shaft portion 3-2 and the protruding base portion of the support portion 2 of the dish-shaped housing 1 low plate 1-1 are inserted, respectively, from the center portion to the braking plate portion 3-1. The fan is formed in a reverse fan shape toward the outer periphery of the fan, and the fan portion is formed in a corrugated shape in the circumferential direction (see FIG. 3). The height of the corrugated part 8 is between the braking plate part 3-1 of the rotor 3 and the lower plate 1-1 of the dish-shaped housing 1, and between the braking plate part 3-1 and the top plate 4-2 of the cap 4. The height should be such that a certain pressure contact force (spring force) is applied between the two when they are respectively interposed.

By the way, the plastics that make up the braking member 5 are thermoplastics such as polypropylene terephthalate (PBTP), polyacetal (POM), polyamide (PA) (nylon 6.10.12.6/6.6/10.6/11), polyethylene ( PE), polypropylene (PP), polymethylmethacrylate (PMMA), polystyrene (PS), AS resin (crylonitrile-styrene resin), ABS resin (acrylonitrile-butadiene-styrene resin), polycarbonate (PS), polyethylene Menterephthalate (PETP) etc. are mentioned.

Thus, the pressure contact force (spring force) of the braking member 5 that presses and clamps the disc plate 3-1 projecting and indented inside the dish-shaped housing 1 from above and below against the disc plate 3-1. The frictional force is generated by the force and exerts a braking effect of braking the rotation of the rotor 3. Then, by changing the number of the corrugated portions 8 of the braking member 5, the frictional resistance can be adjusted to be increased or decreased. That is, the braking force on the rotor 3 can be freely adjusted.

4 to 5 show another embodiment in which the corrugated form of the braking member 5 is changed, and in this embodiment, the corrugated portion 8 is formed in the radial direction from the center.

6 to 12 show a rotary damper according to a second aspect of the present invention. In the case of this rotary damper, the disk-shaped housing 1 has a disk shape slightly smaller than the inner diameter of the plate-shaped housing 1 inside. The braking plate portion 3-1 of the rotor 3 which is formed on the upper side of the rotor 3 is made of soft rubber or thermoplastic and is at least between the braking plate portion 3-1 and the lower plate 1-1 of the dish-shaped housing 1 and the braking plate portion 3-. 1 and the top plate 4-2 of the cap 4 are rotatably mounted in a state of being clamped from above and below by a pair of upper and lower braking members 9 formed in the shape of a ring disk having a thickness capable of interposing in a pressure contact state. By doing so, the rotation of the rotor 3 is braked. In this embodiment, the same reference numerals are used for the same constituent members and constituent parts detailed in claim 1, and the description thereof will be omitted.

The pair of upper and lower braking members 9 is a ring having a sectional shape capable of pressing the upper and lower surfaces of the braking plate portion 3-1 and the outer peripheral surface thereof with soft rubber such as silicone rubber or urethane rubber or the above-mentioned thermoplastics. It is formed into a disc shape. In addition, the thickness of the braking member 9 was made to exist inside the dish-shaped housing 1 together with the braking plate portion 3-1, and then the cap 4 was attached to the opening by a screwing method to close the opening. At this time, it is formed to a thickness such that it is compressed and a pressure contact force is applied to the braking plate 3-1.

Thus, the braking plate portion 3-1 projecting inwardly in the disk-shaped housing 1 and protruding from the inside thereof is pressed against the braking plate portion 3-1 from above and below and the outer periphery thereof. As a result, frictional resistance is generated to exert a braking effect of braking the rotation of the rotor 3.

Further, in the embodiment according to claim 2, as shown in FIG. 8 to FIG. 12, the upper and lower outer peripheral edges of the braking plate portion 3-1 of the rotor 3 are edged, Then, the type with a flat surface treatment on the edging surface (Fig. 8) and the type with undulations 10 treatment that is continuous in the corrugated shape, sawtooth shape, or key shape on the edging surface only (Fig. 9) ), The type with only 10 irregularities on the outer peripheral surface (Fig. 10), the type with 10 irregularities on the upper and lower surfaces and the edging surface (Fig. 11), the upper and lower surfaces, the outer peripheral surface, and the entire edging surface (all areas) By using a type having unevenness 10 (FIG. 12), it is possible to change the contact state with the braking member 9 to increase or decrease the friction resistance and adjust the friction resistance. That is, the braking force applied to the rotor 3 can be freely adjusted by changing the upper and lower surfaces, the outer peripheral surface, and the edging surface of the control plate portion 3-1, as described above.

[0019]

[Effect of device]

 Since the rotary damper of the present invention is constructed as described above, it has the following operational effects. ． The brake plate that protrudes in a disk shape inside the dish-shaped housing is pressed and clamped from above and below by a braking member formed in a thin-walled wave shape using a spring material, so that the brake plate is braked when the rotor rotates. Friction resistance is generated by the pressure contact force (spring force) of the member, and rotation of the rotor can be braked.

Therefore, according to the rotary damper of the first aspect of the present invention, the disk-shaped housing is internally provided with the braking member formed in the thin-walled wave shape by the spring material for pressing and sandwiching the braking plate portion from above and below. Since the rotation is mechanically braked, it is not necessary to use a viscous fluid such as oil or grease. That is, since the troublesome and troublesome fixing work of fixing the dish-shaped housing and the cap by high-frequency welding or the like as in the past is not necessary at all, the assembly is very simple and the manufacturing cost is low. You can ． The braking plate part that protrudes inward in a disk shape inside the dish-shaped housing is clamped from above and below by a braking member that is made of soft rubber or thermoplastic and formed into a ring disk shape. Friction resistance is generated by the pressure contact force of the braking member against the portion, and the rotation of the rotor can be braked.

Therefore, according to the rotary damper of the second aspect, similarly to the first aspect, the rotation of the rotor can be braked without using a viscous fluid such as oil or grease. Immediately, there is no need for any troublesome and troublesome fixing work such as fixing the dish-shaped housing and the cap by high-frequency welding as in the past, so the assembly is very simple and the manufacturing cost is low. it can.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of implementation of a rotary damper according to claim 1 of the present invention.

2 is a cross-sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view showing a braking member.

FIG. 4 is a longitudinal sectional view showing another embodiment of the rotary damper of the present invention.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is a longitudinal sectional view showing an example of an embodiment of the rotary damper according to claim 1 of the present invention.

7 is a cross-sectional view taken along the line VII-VII in FIG.

FIG. 8 is a perspective view showing a rotor, in which (a) is a plan perspective view and (b) is a bottom perspective view.

FIG. 9 is a perspective view showing a modified example of a rotor in which the peripheral edging surface of the braking plate portion is uneven, and (a) is a plan perspective view,
(B) is a bottom perspective view

FIG. 10 is a perspective view showing a modified example of the rotor in which the outer peripheral surface of the braking plate portion is uneven, where (a) is a plan perspective view and (b) is a bottom perspective view.

FIG. 11 is a perspective view showing a modified example of the rotor in which the upper and lower surfaces of the braking plate portion and the outer peripheral edge taking surface are made uneven, (a) is a plan perspective view, and (b) is a bottom perspective view.

FIG. 12 is a perspective view showing a modified example of the rotor in which the upper and lower surfaces of the braking plate portion, the outer peripheral surface, and the outer peripheral edge taking surface are made uneven, (a) is a plan perspective view, and (b) is a bottom perspective view.

[Explanation of symbols]

1 ... Dish-shaped housing 1-1 ... Lower plate 2 ... Support part 3 ... Rotor 3-1 ... Braking plate part 3-2 ... Rotating shaft part 4 ... Cap 4-2 ... Top plate 5, 9 ... Braking member 8 ... Waveform Department

Claims (2)

[Scope of utility model registration request] 1. A rotor comprising a dish-shaped housing, a braking plate portion that rotates on a support portion that projects from a lower plate center of the dish-shaped housing, and a rotating shaft portion that stands up from the center of the braking plate portion. A cap that closes the inside of the dish-shaped housing from above, and a pair of upper and lower braking members that are internal to the dish-shaped housing and clamp the braking plate portion from above and below,
The braking plate is formed in a disk shape slightly smaller than the inner diameter of the dish-shaped housing, while the braking member is thin and is formed between the braking plate and the lower plate of the dish-shaped housing and between the braking plate and the cap. A rotary damper, characterized in that it is formed in a corrugated shape having heights that intervene in pressure contact with the board. 2. A rotor comprising a dish-shaped housing, a braking plate portion that rotates on a support portion that projects from the lower plate center of the dish-shaped housing, and a rotating shaft portion that stands up from the center of the braking plate portion. A cap that closes the inside of the dish-shaped housing from above, and a pair of upper and lower braking members that are internal to the dish-shaped housing and clamp the braking plate portion from above and below,
The braking plate portion is formed to project in a disk shape slightly smaller than the inner diameter of the dish-shaped housing, while the braking member is made of soft rubber or thermoplastic at least between the braking plate portion and the lower plate of the dish-shaped housing and A rotary damper characterized by being formed in a ring disk shape having a thickness interposed between the braking plate portion and the top plate of the cap in a pressure contact manner.