JP2008284179A - Braking mechanism and home electric appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braking mechanism which prevents unreasonable stress from acting on a braking means during a braking action. <P>SOLUTION: The home electric appliance has an equipment body 3 having a shoulder body 6 at the edge of the upper end opening of the bottomed body portion and a lid body 4 rotatably attached to the shoulder body 6 of the equipment body 3 through a hinge pin 14 and elastically urged in the opening direction. The home electric appliance has fixed slidingly contacting portions 9 formed in the shoulder body 6 of the equipment body 3, and a braking means made up of at least a braking portion arranged in the vicinity of the hinge shaft 14 of the lid body 4 and slidingly contacting the fixed slidingly contacting portions 9 at right angles when the lid body 4 is opened in the surface intersecting the hinge pin 14. The braking means has a sliding contact line nearly agreeing with the edge portion 33 of the fixed slidingly contacting portions 9 when slidingly contacting the fixed slidingly contacting portion 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a metal brake mechanism and household electric appliances such as a rice cooker and an electric pot equipped with the metal brake mechanism.

  Generally, in household electrical appliances, the lid is biased by a spring to open and has a large impact when opened. Therefore, the lid is braked by sliding contact between the brake means of the lid and the fixed sliding contact portion of the device body. .

  In Patent Document 1, the brake part comes into contact with the fixed sliding contact part to start sliding contact, and a braking force is applied to the lid body by friction caused by the sliding contact. Has proposed a brake mechanism that makes an oblique contact with a fixed sliding contact portion.

  In Patent Document 2, the brake spring starts to hit the bearing piece of the rice cooker body, and this causes the brake spring to apply a braking force to the opening operation of the lid, thereby suppressing the opening force of the lid. There has been proposed a brake mechanism in which the brake spring hits the bearing piece obliquely.

  However, in any brake mechanism described in any of the patent documents, the brake part strikes against the contact surface at the time of contact, so that excessive stress is applied to the brake part, causing the brake part to come off and crack.

JP 2004-16579 A Japanese Patent Laid-Open No. 11-56613

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a brake mechanism in which excessive stress does not act on the brake portion during braking.

  As a means for solving the above-mentioned problems, a brake mechanism according to the present invention includes a device main body having a shoulder body at an upper end opening edge of a bottomed body, and one end having a hinge shaft on the shoulder body of the device main body. A household electric product including a lid that is rotatably mounted and elastically biased in the opening direction, and a fixed sliding contact portion formed on a shoulder of the device body, and the lid And a brake means comprising: the fixed sliding contact portion that is disposed in the vicinity of the hinge shaft, and at least one brake portion that is slidably contacted with a surface orthogonal to the hinge shaft when the lid is opened. The brake means has a slidable contact line that substantially coincides with an edge of the fixed slidable contact portion when slidably contacting the fixed slidable contact portion.

  When the slidable contact line of the brake means substantially coincides with the edge of the fixed slidable contact portion when slidably contacting the fixed slidable contact portion, excessive stress is not applied to the brake means during braking.

  As one specific means, the brake means is disposed with a first brake portion that is in sliding contact with the fixed sliding contact portion of the device main body at the initial opening of the lid, and is separated from the first brake portion. It is preferable that the cover body includes a second brake portion that is in sliding contact with the fixed sliding contact portion of the device main body at a later stage of opening of the lid body, and the first and second brake portions each have the sliding contact line.

  Since the first and second brake parts have sliding contact lines, excessive stress is not applied when the first and second brake parts are in sliding contact with the fixed sliding contact part.

  Further, as another means, the brake means is provided between the first brake part and the second brake part with a weaker braking force than the first brake part in the middle of the opening of the lid body. It is preferable to further include a relaxation portion that releases the braking force without sliding contact with the fixed sliding contact portion or without sliding contact with the fixed sliding contact portion.

  It can prevent that a cover body stops in the middle of opening because a brake means has a relaxation part.

  The brake means includes a mounting piece attached near the hinge shaft of the lid, and a sliding surface that extends from the mounting piece and that is perpendicular to the hinge shaft when the lid is opened. The elastic piece is adjacent to the mounting piece, the first brake part adjacent to the first brake part, the relaxation part adjacent to the first brake part, and stronger than the relaxation part. The second brake part acting on a brake force, and the sliding contact line includes a first sliding contact line that first comes into contact with an edge of the first brake part and the fixed sliding contact part, and the second brake part. And a second slidable contact line that first slidably contacts the edge of the fixed slidable contact portion.

  Since the brake means is composed of one part, the number of parts and the structure are simplified, and the manufacturing cost can be reduced.

  Furthermore, it is preferable that the fixed sliding contact portion and the brake means engage in parallel when the opening of the lid is completed.

  Since the fixed sliding contact portion and the brake means are engaged in parallel, a force acts evenly on the brake means when the lid is fully opened, and deterioration of the brake means can be prevented.

  According to the present invention, the slidable contact line of the brake means is parallel to the edge of the fixed slidable contact portion when slidably contacting the fixed slidable contact portion. The brake means can be prevented from coming off and cracking without acting.

FIG. 1 shows a rice cooker 2 which is a household electric product provided with a brake fitting 1 according to the present invention.
The rice cooker 2 includes a device main body 3 that removably accommodates a rice cooker (not shown), and a lid 4 that opens and closes the upper end opening of the device main body 3.

  The apparatus body 3 includes a body 5 having a bottomed body shape, and a shoulder body 6 at an upper end opening edge of the body 5. An operation panel 7 including a liquid crystal display device and various operation switches is disposed at the front portion of the shoulder body 6. A hinge receiving portion 8 is formed at the rear portion of the shoulder body 6. The hinge receiving portion 8 at the rear of the device main body 3 is provided with a fixed sliding contact portion 9 made of resin for applying a brake when the lid 4 is opened to the device main body 3. The fixed sliding contact portion 9 extends upward on both sides of the hinge receiving portion 8.

  The lid 4 is made of a resin-made lower plate 10, a metallic reinforcing plate 11 arranged on the upper surface side of the lower plate 10, and a resin-made resin arranged on the upper surface side of the reinforcing plate 11. And an upper lid member 12. The upper lid member 12 has a shell shape and is formed so as to cover the entire lid body 4.

  The lid 4 has a hinge hole 13 formed on the rear end side of the reinforcing plate 11 and is attached to the hinge shaft 14 inserted through the hinge hole 13 so as to be freely opened and closed. The hinge shaft 14 is fitted and supported by a pair of bearings 15 provided on the apparatus main body 3 side in order to support the hinge shaft 14. A pair of left and right hinge springs 16 are inserted through the hinge shaft 14. Thereby, the cover body 4 is elastically urged | biased by the hinge spring 16 in the open direction shown by the arrow A in FIG.

  On the rear end side of the lid body 4, the lid body 4 is braked by friction caused by sliding contact with the fixed sliding contact portion 9 of the device body 3 when the lid body 4 is opened with respect to the device body 3. A brake fitting 1 is provided. The brake fitting 1 is attached to the rear end of the reinforcing plate 11 so as to rotate around the hinge shaft 14 together with the lid 4. The brake metal fitting 1 is metallic, and includes an attachment piece 17 attached to the reinforcing plate 11 and an elastic piece 18 that comes into sliding contact with the fixed sliding contact portion 9 of the device body 3 when the lid body 4 is opened. A first brake portion 19 that is adjacent to the piece 17 and applies a brake between the lid 4 and the fixed sliding contact portion 9 in the initial stage of opening, and is adjacent to the first brake portion 19 and is fixed in the middle of the opening of the lid body 4. A loosening portion 20 that loosens the brake between the sliding contact portions 9 or does not act on the braking force, and a second portion that is adjacent to the relaxing portion 20 and applies a brake between the stationary sliding contact portion 9 in the latter half of the opening of the lid 4. 2 brake parts 21.

FIG. 2 shows a brake fitting 1 according to the first embodiment of the present invention.
The attachment piece 17a is attached to the upper surface of the reinforcing plate 11 via a screw (not shown) so that the elastic piece 18a is in sliding contact with the surface perpendicular to the hinge shaft 14 of the fixed sliding contact portion 9. Also, two holes, an attachment hole 22 for attaching to the reinforcing plate 11 inside the lid 4 of the attachment piece 17a, and a positioning hole 23 for positioning the brake fitting 1a outside the lid 4 are provided. Is provided.
The second slidable contact surface 24 of the elastic piece 18a extends vertically downward from the attachment piece 17a. Further, on the rear side of the second sliding contact surface 24, a first sliding for guiding the elastic piece 18a to the fixed sliding contact portion 9 until the fixed sliding contact portion 9 and the second sliding contact surface 24 start sliding contact. A contact surface 25 and a slide contact guide portion 26 a are formed so as to extend from the first slide contact surface 25 toward the outside of the device body 3. The first sliding contact surface 25 and the sliding contact guide portion 26a are separated by a first sliding contact line 27a. A third slidable contact surface 28 connected to the relaxation portion 20 is formed below the second slidable contact surface 24, and the first brake portion 19 a includes a first slidable contact surface 25, a second slidable contact surface 24, and a second slidable contact surface 24. The third sliding contact surface 28 is configured.
The relaxation portion 20 of the elastic piece 18 a is recessed outside the lid body 4 with respect to the third sliding contact surface 28.
The fifth slidable contact surface 29 of the elastic piece 18 a extends downward from the relaxing portion 20 toward the inside of the device main body 3 via the fourth slidable contact surface 30. The relaxing part 20 and the fourth sliding contact surface 30 are separated by a second sliding contact line 31. The 4th sliding contact surface 30 is arrange | positioned between the relaxation part 20 and the 5th sliding contact surface 29, and inclines below from the front to the back. The second brake portion 21 includes a fourth sliding contact surface 30 and a fifth sliding contact surface 29. A fixing portion 32 a extending horizontally toward the reinforcing plate 11 is formed at the lower end of the fifth sliding contact surface 29 in order to support the brake fitting 1 a with the reinforcing plate 11. The fixed portion 32 a is in contact with the reinforcing plate 11. Thereby, one end of the elastic piece 18a is fixed to the attachment piece 17a, and the other end is supported by the reinforcing plate 11. Of course, the fixing portion 32a may be configured to be separated from the reinforcing plate 11.

Next, the operation of the brake fitting 1 according to the first embodiment of the present invention will be described.
3 to 8, when the lid 4 is closed, the brake metal fitting 1a is positioned in front of the fixed sliding contact portion 9 (FIG. 3). The lid 4 starts to open around the hinge shaft 14 by the urging force of the hinge spring 16, and the brake fitting 1 a also rotates around the hinge shaft 14, and the first sliding contact line 27 a and the edge 33 of the fixed sliding contact portion 9 Substantially coincide with each other, and the first sliding contact surface 25 starts sliding contact with the side surface of the fixed sliding contact portion 9. Thereby, an unreasonable stress does not act on the brake fitting 1a. Subsequently, the second sliding contact surface 24 comes into sliding contact with the fixed sliding contact portion 9, and thereafter, the third sliding contact surface 28 comes into sliding contact with the fixed sliding contact portion 9, whereby the first brake acts (FIG. 4). Further, when the lid 4 is opened, the relaxing portion 20 follows the first brake portion 19a, or comes into sliding contact with the side surface of the fixed sliding contact portion 9 or releases the sliding contact (FIG. 5). In the relaxation part 20, the brake force is weakened or the brake force is released to prevent the lid body 4 from being stopped in the middle of opening due to the action of the brake force. When the lid 4 continues to open, the second slidable contact line 31 and the edge 33 of the fixed slidable contact portion 9 substantially coincide with the relaxing portion 20, and the fourth slidable contact surface 30 of the second brake portion 21 extends. The sliding contact with the side surface of the fixed sliding contact portion 9 is started. Thereby, unreasonable stress does not act on the brake fitting 1a. Subsequently, the fifth slidable contact surface 29 comes into slidable contact with the fixed slidable contact portion 9, and the second brake acts (FIG. 6). When the lid 4 is opened, the fifth sliding contact surface 29 of the second brake portion 21 is held in a state of being engaged in parallel with the side surface of the fixed sliding contact portion 9 (FIG. 7). By engaging the fifth sliding contact surface 29 in parallel with the side surface of the fixed sliding contact portion 9, the second brake portion 21 receives a force equally from the side surface of the fixed sliding contact portion 9 after the opening of the lid body 4, Breakage of the brake fitting 1a due to excessive stress can be prevented (FIG. 8).

9 to 11 show a brake fitting 1b according to the second embodiment of the present invention, and the same elements as those of the first embodiment of FIG.
The sliding contact guide portion 26b of the elastic piece 18b extends downward from the attachment piece 17b.
The first brake portion 19b of the elastic piece 18b is separated from the sliding contact guide portion 26b by the first sliding contact line 27b, and extends in the horizontal direction from the sliding contact guide portion 26b toward the front of the device main body 3. A fixing portion 32b extending toward the reinforcing plate 11 is formed at the front end of the first brake portion 19b to fix the brake fitting 1b between the first brake portion 19b and the reinforcing plate 11.

Next, the operation of the brake fitting 1 according to the second embodiment of the present invention will be described.
When the lid is closed, the brake fitting 1b is disposed in front of the fixed sliding contact portion 9 (FIG. 9). The lid 4 starts to open around the hinge shaft 14 and the brake fitting 1b also rotates around the hinge shaft 14, and the sliding contact guide portion 26b rotates without sliding against the fixed sliding contact portion 9. When the lid 4 is further opened, the first sliding contact line 27b and the edge 33 of the fixed sliding contact portion 9 substantially coincide with each other, and the first brake portion 19b starts sliding contact with the side surface of the fixed sliding contact portion 9 (FIG. 10). ). The opening of the lid body 4 is stopped by the torque acting on the first brake part 19b. When the lid 4 is opened, the first brake portion 19b is held in a state of being engaged with the side surface of the fixed sliding contact portion 9 (FIG. 11).

  In addition, the brake part of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, each of the first brake part and the second brake part can be constituted by different parts. Further, the brake part may be made of not only metal but also other materials such as resin. Furthermore, the brake portion is not a separate part, and may be formed by processing the shape of the lower plate 10. The slidable contact line does not need to be a clearly appearing ridge line as in this embodiment. For example, when the slidable contact line portion is configured with a large radius, the slidable contact line is fixed slidable in contact with the fixed slidable contact portion 9. You may make it have the slidable contact line substantially corresponded with the edge part 33 of the part 9. FIG. Furthermore, the sliding contact line can be configured as a surface.

1 is a partially cutaway exploded perspective view of a first embodiment according to the present invention. 1 is an overall perspective view of a brake fitting according to a first embodiment of the present invention. Sectional drawing of the brake mechanism which concerns on 1st Embodiment at the time of lid closing. Sectional drawing of the brake mechanism which concerns on 1st Embodiment at the time of a 1st brake effect | action. Sectional drawing of the brake mechanism which concerns on 1st Embodiment at the time of brake relaxation. Sectional drawing of the brake mechanism which concerns on 1st Embodiment at the time of a 2nd brake effect | action. Sectional drawing of the brake mechanism which concerns on 1st Embodiment at the time of lid opening. The upper surface sectional view of the brake mechanism concerning a 1st embodiment at the time of lid opening. Sectional drawing of the brake mechanism which concerns on 2nd Embodiment at the time of lid closing Sectional drawing of the brake mechanism which concerns on 2nd Embodiment at the time of 1st brake action | operation Sectional drawing of the brake mechanism which concerns on 2nd Embodiment at the time of lid opening.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brake metal fitting 3 Equipment body 4 Lid body 6 Shoulder body 9 Fixed sliding contact part 14 Hinge shaft 17, 17a, 17b Attachment piece 18, 18a, 18b Elastic piece 19, 19a, 19b First brake part 20 Relaxation part 21 Second brake Portions 27, 27a, 27b First sliding contact line 31 Second sliding contact line

Claims (5)

An apparatus main body having a shoulder body at the upper end opening edge of the bottomed body, and one end thereof is rotatably attached to the shoulder body of the apparatus main body via a hinge shaft and elastically biased in the opening direction A household electrical appliance comprising a lid,
A fixed sliding contact portion formed on the shoulder of the device body;
Brake means that is disposed near the hinge shaft of the lid, and includes the fixed sliding contact portion and at least one brake portion that slides on a surface orthogonal to the hinge shaft when the lid is opened;
In household electrical appliances with
The household electrical appliance according to claim 1, wherein the brake means has a sliding contact line that substantially coincides with an edge portion of the fixed sliding contact portion when sliding in contact with the fixed sliding contact portion. The brake means includes a first brake portion that is slidably in contact with the fixed sliding contact portion of the device main body when the lid is opened, and is spaced apart from the first brake portion. A second brake portion that is in sliding contact with the fixed sliding contact portion of the main body,
The household electrical appliance according to claim 1, wherein each of the first and second brake parts has the sliding contact line.   The brake means is in sliding contact with the fixed sliding contact portion of the device main body between the first brake portion and the second brake portion with a braking force weaker than that of the first brake portion in the middle of the opening of the lid. 3. The household electrical product according to claim 2, further comprising a relaxation portion that releases a braking force without sliding contact with the fixed sliding contact portion. The brake means includes an attachment piece attached in the vicinity of the hinge shaft of the lid, and an elastic member that extends from the attachment piece and is in sliding contact with the fixed sliding contact portion at a surface orthogonal to the hinge shaft when the lid is opened. Consists of pieces,
The elastic piece includes the first brake part adjacent to the mounting piece, the relaxation part adjacent to the first brake part, and the first brake part that is adjacent to the relaxation part and exerts a stronger braking force than the relaxation part. 2 brake parts,
The slidable contact line includes a first slidable contact line that first slidably contacts an edge of the first brake portion and the fixed slidable contact portion, and an slidable first portion of the second brake portion and an edge of the fixed slidable contact portion. The household electrical appliance according to claim 2, wherein the household electrical product is a second sliding contact line.   The household electrical appliance according to any one of claims 1 to 4, wherein the fixed sliding contact portion and the brake means are engaged in parallel when the opening of the lid is completed.

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