JPH06276460A - Damping device for open/close cover of electronic device - Google Patents

Abstract

PURPOSE:To obtain a sufficient damping effect without need of an oil damper or the like and to reduce number of components by providing a grease pool for torque grease with a step or a groove formed thereto between a turning shaft and a bearing section. CONSTITUTION:An open cover 1 of an electronic device is engaged with a turning shaft of an operation panel through a bearing section 4 in a turnable way. Plural grease pools 7 are arranged to the bearing section 4 in the circumferential direction and torque grease with high viscosity used for an oil damper is sealed in the grease pools 7. In order obtain a sufficient damping effect, it is effective to increase a contact area of the turning shaft and the bearing section 4, and then a step or a groove is provided to at least one of the surface of the both. Through the constitution above, a sufficient damping effect is enhanced even when an oil damper is omitted through the constitution above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for an opening / closing lid of electronic equipment, and more particularly to a television or a V.
The present invention relates to a braking device for an opening / closing lid of an electronic device, which can attenuate the opening / closing speed of an opening / closing cover covering an adjusting knob such as TR to visually give a high-class feeling to the device.

[0002]

2. Description of the Related Art Conventionally, it is well known that an air damper unit or an oil damper unit has been widely used in buildings as a means for slowly opening and closing a door. These are usually those that unitize a shock absorber (damper) and connect it to the door with a gear or a link mechanism to obtain a damper effect. Has also been applied.
For example, Japanese Utility Model Laid-Open No. 62-183474 discloses an example using an air damper as shown in FIG. In the operation explanatory view of FIG. 8, 21 is a box of the television receiver, 26 is a door, the engaging portion 14 is provided at one end of a cylindrical piston 33 that slides inside the air damper 11, and the shaft 15 , 19 are engaged. In this case, the air damper 11 is rotatably supported by the protrusion 13, while the shaft 19 is engaged with the door 26. Therefore, when the door 26 is opened and closed, the shaft 15 rotates about the shaft 19 and accordingly, The engaging portion 14 moves, but at that time, the piston 33 slides to provide the effect of an air damper, and as a result, the opening and closing of the door is braked.

Further, an example in which an oil damper is used as a damping means for an opening / closing door in a household electric device or the like is shown in a front view of a main part of FIG. The means shown in the figure is the door 2 provided in the device body 22.
The force is transmitted to the gear 17 of the oil damper unit 10 from the gear 16 attached to the rotating shaft 12 of No. 6. The oil damper unit 10 has a high-viscosity grease (torque grease) enclosed in a cylindrical container, a shaft 18 rotatably protruding from the container, and a gear 17 fitted therein. On the other hand, the shaft 1
A rotor, which is formed in a rectangular thin plate shape, for example, is fixed to an end portion of the container of No. 8 when the rotor rotates in the torque grease in the container of the oil damper unit 10. The viscosity produces a braking effect.

Further, another example of using an oil damper for adjusting the opening speed of an opening / closing lid for electric equipment is shown in Japanese Utility Model Laid-Open No. 61-28926, which is shown in FIG.
Will be described. In the configuration shown in the side view of FIG.
When the lid (door) 26 is opened, the rotary shaft 12 provided on the lid 26
Gear 16 coaxial with and gear 1 of oil damper unit 10
7, an intermediate gear 20 is provided in the middle of the intermediate gear 20, and an adjusting screw 30 is planted in the axial center of the intermediate gear 20 to adjust the frictional resistance.

[0005]

All of the above-mentioned conventional techniques have some effects and can be used as braking means. However, in each of these technologies, an oil damper or an air damper is used, and ancillary parts such as shafts and gears are also attached to the oil damper, and when the number of parts is increased in this way, these parts are added to the braking part. Space is needed for it.
That is, in the above technique, there is a space problem when the door of the target device is particularly small. Further, as described above, the large number of parts complicates quality control of parts, and
Inevitably, it will be expensive. Therefore, an object of the present invention is to provide a braking device that has a simple structure with a small number of parts and that effectively operates as a braking means for an opening / closing lid of a small electronic device without occupying a space.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is to provide a rotary shaft provided on the device panel side in an opening / closing lid of an electronic device. And an electronic device having a bearing provided on the lid and rotating by engaging with the rotary shaft, and a grease reservoir of torque grease is formed on either or both of the outer surface of the rotary shaft and the inner surface of the bearing. It is in the braking device of the lid. In this case, the rotating shaft has a substantially conical shape, and the bearing has an inner surface shape that matches the rotating shaft,
Alternatively, it is effective that the rotating shaft has a substantially cylindrical shape and the bearing portion has a substantially cylindrical inner surface shape that is aligned with the rotating shaft.
Further, one or more steps or grooves are provided on the outer surface of the rotary shaft, while one or more steps are provided as grease reservoirs on the inner surface of the bearing at a position slightly deviated from the corresponding position of the steps. It is valid.

[0007]

According to the present invention, the use of a damper unit as in the conventional means is not used at all, and a grease reservoir of torque grease formed by a step or a groove is provided between the rotary shaft and the bearing, thereby extremely Even though it is a compact structure, a braking action comparable to that of the damper unit can be obtained. This is because the contact area between the rotating shaft and the bearing part becomes large by providing a step, etc., and the presence of torque grease with high viscosity between them increases the adhesive effect of the torque grease, while opening and closing the open / close lid. In this case, the action of smoothing the movement of the rotary shaft is also performed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 is a perspective view for explaining an outline of a configuration in the vicinity of an opening / closing lid of an electronic device which is an object of the present invention. As shown in the figure, the opening / closing lid 1 is attached to the operation panel 2, and in this case, the opening / closing lid 1 is engaged with the rotating shaft 3 of the operation panel 2 by the bearing portion 4 and is rotatably provided. ing. Further, the opening / closing lid 1 is provided with a claw portion 5a so that when the opening / closing lid 1 is closed, the concave portion 5 of the panel 2 is closed.
It can be latched with the latch 5 provided in b. When the opening / closing lid 1 is opened, the claw portion 5a is detached from the latch 5 by pulling the side surface of the opening / closing lid 1 with a finger or the like, and the opening / closing lid 1 rotates about the rotation shaft 3 of the operation panel 2. The lid 1 opens.

The outline of the above operation is shown in FIG.
FIG. 3A is a side sectional view of a main part shown in FIGS.
Shows the closed state of the opening / closing lid 1, and (b) shows the opened state. As seen in (a) and (b) of FIG.
The bearing portion 4 generally has a substantially C-shaped cross section to facilitate mounting and, as seen in FIG. 2 (b),
If an excessive load is applied when opening the opening / closing lid 1, C
Since the mold part is pushed open and opened, and is released from the panel 2, the rotary shaft 3, the opening / closing lid 1, the bearing portion 4 and the like are not damaged. In addition, these members are generally made of small-sized and comparatively simple molded products by injection molding of plastic such as ABS resin or PS resin.

The engagement between the opening / closing lid 1 and the operation panel 2 which is the subject of the present invention is performed as described above, but the main point of the present invention is the rotation for such engagement. The point is that a grease reservoir for torque grease is formed on one or both of the outer surface of the shaft 3 and the inner surface of the bearing portion 4. That is, FIG. 3 is an enlarged schematic explanatory view of an essential part for explaining an example of a configuration in the vicinity of the engaging portion, and a bearing integrally formed with the opening / closing lid 1 with respect to a rotary shaft 3 integrally formed with the panel 2. The portion 4 is engaged, and at that time, one or more stepped portions or groove portions are formed as the grease reservoir 7 on the inner surface side of the bearing portion 4. The rotating shaft 3 in FIG.
FIG. 5 shows an enlarged schematic explanatory view of the main parts in the vicinity and in the vicinity of the bearing portion 4 in FIG. 5. The rotating shaft 3 has a substantially conical shape as seen in FIG. It has a substantially conical inner surface shape that matches the rotating shaft 3.
By engaging these with each other, the engaging portion shown in FIG. 3 is formed.

As shown in the perspective cutout shown in the schematic explanatory view of FIG. 5, a plurality of grease reservoirs 7 are arranged in the circumferential direction in the bearing portion 4, and the grease reservoir 7 is provided with, for example, an oil damper. The high-adhesive torque grease used for is applied or enclosed, thereby making it possible to exert the braking effect expected of the oil damper. In this case, in the electronic device to which the present invention is applied, since a considerable part of the box body, the opening / closing lid 1, the operation panel 2 and the like are mainly plastic injection-molded products as described above, Since it must be structurally injection moldable, it is difficult to select an extremely complicated shape as the shape of the grease reservoir 7 from the viewpoint of only the grease holding effect. As shown in the invention, as long as one or both of the outer surface of the rotating shaft 3 or the inner surface of the bearing portion 4 is formed with a step or groove, it is possible to perform injection molding of plastic integrally with each member,
Moreover, it is possible to bring about a sufficient oil damper braking effect.

In order to exert a sufficient braking effect as described above, it is effective to increase the contact area between the rotary shaft 3 and the bearing portion 4, and in that sense as well, at least one of the surfaces of both of them has a step. Means such as providing a portion or the like, or making the rotating shaft 3 substantially conical and making the inner surface shape of the bearing portion 4 conform to the above is an effective means for enlarging the contact area between the both. However, if the allowance of the step portion or the groove portion is sufficient, the shape of the rotating shaft 3 is not particularly limited to the conical shape, and may be a substantially cylindrical shape having a relatively simple mold shape. Can also be a relatively simple cylindrical shape that matches this. Further, when the groove or the like is provided on the rotary shaft 3 or the bearing portion 4, it is not necessarily provided in the circumferential direction, and may be provided on the outer surface or the inner surface along the central axis direction.

Further, FIG. 6 shows still another embodiment of the rotary shaft 3 used in the present invention. First, in FIG. 6A, the rotating shaft 3 has a substantially conical shape, and a plurality of groove portions 7a are provided as a grease reservoir 7 on the outer periphery thereof, and an enlarged view thereof is shown in a circle. In the case of this embodiment, since the volume of the grease reservoir is large, a large amount of torque grease can be enclosed as compared with the other examples. Further, in FIG. 6 (b), the rotary shaft 3 has a substantially conical shape, and a plurality of stepped portions 7b are provided on the outer periphery of the rotary shaft 3 to store grease therein.
It is provided as. A combination of these with the bearing portion 4 having the embodiment as shown in FIG. 5 is the engaging portion shown in the schematic explanatory view of FIG. 7. In this case, as shown in FIG. 7, by molding so that the position of the stepped portion provided on the rotary shaft 3 is slightly deviated from the position of the stepped portion provided on the bearing portion 4, and then engaging the same. Since the space for the grease reservoir 7 as shown in FIG. 7 can be formed, the braking effect can be exhibited if torque grease is applied and sealed in this space.

The determination of the performance of the torque grease will be described. JIS B1521 deep groove ball bearing series 6
No. 0, bearing number # 6000 is used, and various torque greases are filled in this bearing for 10 rp.
Grease showing a value of 130 gf-cm or more is suitable when the torque is measured by rotating at a rotation speed of m. In this case, the torque value of grease is 170 gf-c
If it is m, even if an iron plate for reinforcement is put in the opening / closing lid and the weight is increased as a result, it does not affect the braking effect and can be said to be practically acceptable.

[0015]

According to the present invention, a device such as an oil damper or an air damper, which is used in the conventional braking means, is not required. Therefore, the number of parts can be remarkably reduced.
Since it does not occupy the surrounding space, it can be effectively used for extremely small equipment, and its structure is relatively simple, so it can be easily molded integrally with existing parts by ordinary injection molding. It is possible to achieve this, is extremely economical, and exhibits a braking effect comparable to that of the conventional braking means, and its practical effect is immeasurable.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an outline of a configuration in the vicinity of an opening / closing lid of an electronic device which is a target of the present invention.

2A and 2B are side cross-sectional views of a main part for schematically explaining the operation of the opening / closing lid of FIG. 1, where FIG. 2A shows a closed state and FIG. 2B shows an open state.

FIG. 3 is an enlarged schematic explanatory view of an essential part for explaining an example of a configuration in the vicinity of an engaging portion of the opening / closing lid of FIG.

FIG. 4 is an enlarged schematic explanatory view of a main part near a rotation axis in FIG.

FIG. 5 is an enlarged schematic explanatory view of a main part near the bearing part in FIG.

FIG. 6 is an explanatory view showing another embodiment of the rotary shaft used in the present invention.

FIG. 7 is a schematic explanatory view showing another example of the aspect of the engaging portion in the present invention.

FIG. 8 is a diagram showing a conventional example using an air damper.

FIG. 9 is a diagram showing a conventional example using an oil damper.

FIG. 10 is a diagram showing another conventional example using an oil damper.

[Explanation of symbols]

 1 Open / Close Lid 2 Operation Panel 3, 12 Rotation Shaft 4 Bearing 5 Latch 5a Claw 5b Recess 7 Grease Reservoir 7a Groove 7b Step 10 Oil Damper Unit 11 Air Damper Unit 13 Projection 14 Engagement 15, 18, 19 Shaft 16 , 17, 20 Gears 21 Box body 22 Main body 26 Door (lid) 30 Screw 33 Piston

Claims (4)

[Claims] 1. An opening / closing lid of an electronic device, comprising: a rotating shaft provided on the device panel side; and a bearing portion provided on the lid and rotating by engaging with the rotating shaft, and an outer surface of the rotating shaft. A braking device for an opening / closing lid of an electronic device, wherein a grease reservoir of torque grease is formed on either or both of the inner surfaces of the bearing portion. 2. The braking device for an opening / closing lid of an electronic device according to claim 1, wherein the rotating shaft has a substantially conical shape, and the bearing portion has an inner surface shape matching with the rotating shaft. 3. The braking device for an opening / closing lid of an electronic device according to claim 1, wherein the rotating shaft has a substantially cylindrical shape, and the bearing portion has a substantially cylindrical inner surface shape aligned with the rotating shaft. 4. The rotating shaft has one or more stepped portions or grooves on its outer surface, and one or more stepped portions or grooves on the inner surface of the bearing portion at a position slightly off from a corresponding position of the stepped portion provided on the rotating shaft. The braking device for an opening / closing lid of an electronic device according to claim 1, further comprising a step portion.