Hinge structure

Abstract

The invention relates to a hardware door accessory and discloses a hinge structure which comprises a cam elastic abutting mechanism, a fixed machine base and a movable machine base, and the fixed machine base and the movable machine base are rotationally connected together through a linkage assembly. The cam elastic abutting mechanism comprises a transverse sliding block which is transversely arranged in the movable machine base in a sliding mode and connected with the linkage assembly; the longitudinal sliding block is longitudinally arranged in the movable machine base in a sliding manner; the cam is rotationally arranged in the movable machine base; the spring is arranged in the movable machine base, and one end of the spring abuts against the longitudinal sliding block. Under the action of the hinge structure, the functions of hovering positioning and automatic slow closing can be achieved after the room door is opened by a certain angle, and due to the fact that the hinge is installed in a hidden mode, the overall appearance effect of installation of the room door is greatly improved.

Description

[0001] The present invention is a divisional application of a Chinese patent application filed with the China Patent Office on July 22, 2018, with application number 201810808154.1 and titled “A concealed self-closing hinge structure with buffer”. Technical Field

[0002] The invention belongs to the category of hinge structures, and in particular relates to a door hinge which can automatically and slowly close the door and perform hovering positioning within a specific angle range after the door is opened. Background Art

[0003] With the progress and development of social science, the technical level of our products is also constantly improving. The traditional hinge structure still has some shortcomings. Most door hinges are exposed hinges, which have the following disadvantages: 1. They are not beautiful and can easily damage the overall effect of the door; 2. The exposed part of this type of hinge can easily bring safety hazards to children in the family; 3. Due to design problems, the door often fails to close properly. Although the traditional concealed door hinge is installed in a hidden way, it cannot achieve the effect of automatic closing and positioning. Summary of the invention

[0004] In order to solve the above problems in existing products, the present invention provides a concealed self-closing hinge structure with buffer. Installing it on the door can not only play the effect of concealed door hinge without being exposed, but also can realize the functions of automatic slow closing and positioning after opening the door.

[0005] The technical solution adopted by the present invention is as follows: the present invention comprises a fixed machine base, a moving body and a linkage assembly.

[0006] The fixed machine base is screwed on the door frame.

[0007] The motor body includes a motor seat, a cover plate and a cam elastic pressing mechanism. The motor seat is provided with a horizontal slide groove and a vertical slide groove; the cam elastic pressing mechanism includes a horizontal slider, a vertical slider, a cam, a spring, a damper, a cam connecting shaft and a damper connecting shaft. The horizontal slider is installed in the horizontal slide groove of the motor seat, the vertical slider is installed in the vertical slide groove of the motor seat, the cam is hinged in the motor seat through the cam connecting shaft, the spring is pressed between the upper and lower vertical sliders, and the two ends of the damper are respectively hinged in the damping grooves of the upper and lower vertical sliders through the damper connecting shaft; the cover plate is screwed on the motor seat, and the motor body is installed on the door panel.

[0008] The linkage assembly includes a linkage block, a linkage fork, a linkage rod, a rotating shaft, a fixed machine base connecting shaft, a transverse slider connecting shaft, a linkage fork connecting shaft, a motor base connecting shaft, a linkage rod connecting shaft and a spacing gasket. One end of the linkage block is hinged to the fixed machine base through a rotating shaft; one end of the linkage rod is hinged to the fixed machine base through a fixed machine base connecting shaft, and the other end of the linkage rod is hinged to the transverse slider through a transverse slider connecting shaft; one end of the linkage fork is hinged to the other end of the linkage block through a linkage fork connecting shaft, and the other end of the linkage fork is hinged to the motor base through a motor base connecting shaft, and the middle end of the linkage fork is hinged to the middle end of the linkage rod through a linkage rod connecting shaft, and the above two hinged parts are separated by spacing gaskets.

[0009] When the hinge opening angle is less than 90° (±15°), the cam center, i.e., the cam connecting shaft center, has a horizontal distance from the contact point between the cam and the longitudinal slider greater than zero. At this time, under the action of the spring force, the cam will deflect and drive the door to close automatically; during this process, the damper will slow down the sliding speed of the horizontal slider, thereby realizing the function of automatic slow closing. When the hinge opening angle is greater than 90° (±15°) and less than 180°, the cam center, i.e., the cam connecting shaft center, has a horizontal distance from the contact point between the cam and the longitudinal slider equal to zero. At this time, the cam rotates smoothly and the door can hover at any position within this angle range.

[0010] In order to meet the requirements of different occasions, one or more dampers can be provided, and one or more cam elastic pressing mechanisms can be provided.

[0011] The beneficial technical effects produced by the present invention are: when the door opening angle is less than 90° (±15°), the door can be automatically and slowly closed; when the door opening angle is within the range of 90° (±15°)-180°, the door can be hovered and positioned at any point; at the same time, the present invention also has the advantages of compact structure and quietness. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 It is a three-dimensional schematic diagram of the assembly state of the present invention;

[0014] Figure 2 This is a three-dimensional view of the present invention in an exploded state;

[0015] Figure 3 It is a partial cross-sectional schematic view of the cam elastic pressing mechanism when the hinge is in the closed state.

[0016] The reference numerals in the figure are:

[0017] 1-Fixed machine base;

[0018] 2- Motivational body;

[0019] 21-engine seat, 211-horizontal slide, 212-vertical slide;

[0020] 22-cover plate;

[0021] 23- cam elastic pressing mechanism, 231- cam, 232- spring, 233- transverse slider, 234- longitudinal slider, 2341- damping groove, 235- damper, 236- cam connecting shaft, 237- damper connecting shaft;

[0022] 3- linkage assembly;

[0023] 30- spacer washer, 31- linkage block, 32- linkage fork, 33- linkage rod, 34- rotating shaft, 35- fixed machine base connecting shaft, 36- transverse slider connecting shaft, 37- linkage fork connecting shaft, 38- machine base connecting shaft, 39- linkage rod connecting shaft. DETAILED DESCRIPTION

[0024] The present invention can be implemented in the following ways:

[0025] like Figure 1-3 As shown: the present invention comprises a fixed base 1, a motor body 2 and a linkage assembly 3.

[0026] The fixed engine base 1 is screwed on the door frame. The engine body 2 includes an engine base 21 , a cover plate 22 and a cam elastic pressing mechanism 23 . The engine seat 21 is provided with a transverse slide groove 211 and a vertical slide groove 212; the cam elastic pressing mechanism 23 includes a transverse slider 233, a longitudinal slider 234, a cam 231, a spring 232, a damper 235, a cam connecting shaft 236 and a damper connecting shaft 237, the transverse slider 233 is installed in the transverse slide groove 211 of the engine seat 21, the longitudinal slider 234 is installed in the vertical slide groove 212 of the engine seat 21, the cam 231 is hinged in the engine seat 21 through the cam connecting shaft 236, the spring 232 is pressed between the upper and lower longitudinal sliders 234, and the two ends of the damper 235 are respectively hinged in the damping grooves 2341 of the upper and lower longitudinal sliders 234 through the damper connecting shaft 237; the cover plate 22 is screwed on the engine seat 21, and the engine body 2 is installed on the door panel.

[0027] The linkage assembly 3 includes a linkage block 31, a linkage fork 32, a linkage rod 33, a rotating shaft 34, a fixed machine base connecting shaft 35, a transverse slider connecting shaft 36, a linkage fork connecting shaft 37, a motor base connecting shaft 38, a linkage rod connecting shaft 39 and a spacer washer 30. One end of the linkage block 31 is hinged to the fixed machine base 1 through the rotating shaft 34; one end of the linkage rod 33 is hinged to the fixed machine base 1 through the fixed machine base connecting shaft 35, and the other end of the linkage rod 33 is hinged to the transverse slider 233 through the transverse slider connecting shaft 36; one end of the linkage fork 32 is hinged to the other end of the linkage block 31 through the linkage fork connecting shaft 37, and the other end of the linkage fork 32 is hinged to the motor base 21 through the motor base connecting shaft 38, and the middle end of the linkage fork 32 is hinged to the middle end of the linkage rod 33 through the linkage rod connecting shaft 39, and the above two hinged parts are separated by a spacer washer 30.

[0028] During the process of the door opening from closing, the body 2 starts to rotate, and due to the linkage relationship, all parts also rotate accordingly. During the rotation process, the linkage rod 33 drives the horizontal slider 233 to slide along the horizontal slide groove 211, and the horizontal slider 233 drives the cam 231 to deflect. The deflection of the cam 231 forces the longitudinal slider 234 to move downward along the vertical slide groove 212, thereby continuously squeezing the spring 232, so that the cam elastic pressing mechanism 23 continuously stores energy. When the door opening angle is 90° (±15°), the compression amount of the cam elastic pressing mechanism 23 reaches the maximum, and the cam elastic pressing mechanism 23 no longer stores energy.

[0029] When the door continues to open from 90° (±15°) to 180° (or when the door closes from 180° to 90° (±15°)), the horizontal distance between the contact point of the cam 231 and the longitudinal slider 234 is equal to zero, the cam 231 rotates smoothly, and the hinge itself will not generate any rotational torque. Therefore, within this range, if it is not affected by external forces, the door can be positioned at any position.

[0030] When the door is closed to 90° (±15°), the cam elastic pressing mechanism 23 begins to release energy, and the cam 231 begins to deflect, causing the motor body 2 to start to rotate in the opposite direction; the various components begin to reset, and at this time the damper 235 slows down the reset speed of the cam 231, thereby slowing down the reset speed of the transverse slider 233; due to the linkage relationship, the reverse rotation speed of the motor body 2 is forced to decrease, so that the door has a self-closing buffer effect when it is closed within 90° (±15°).

[0031] In order to meet the requirements of different occasions, one or more dampers 235 can be provided, and one or more cam elastic pressing mechanisms 23 can be provided.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A hinge structure, characterized in that: It includes a cam elastic pressing mechanism and a fixed machine base and a motor base rotatably connected together through a linkage assembly; the cam elastic pressing mechanism includes: A transverse sliding block, which is arranged in the motor seat for transverse sliding movement and is connected to the linkage assembly; A longitudinal sliding block, longitudinally slidably disposed in the engine seat; A cam rotatably disposed in the engine seat; A spring is arranged in the engine seat, one end of which is against the longitudinal slider; wherein During the opening process of the hinge structure, the linkage assembly drives the transverse slider to slide, thereby driving the cam to deflect. The cam deflection forces the longitudinal slider to slide, thereby squeezing the spring, so that the cam elastic pressing mechanism stores energy. When the opening angle of the hinge structure is a first preset angle, the compression amount of the cam elastic pressing mechanism reaches a maximum. When the hinge structure rotates between the first preset angle and the second preset angle, the horizontal distance between the contact point of the cam and the longitudinal slider is equal to zero.

2. The hinge structure according to claim 1, characterized in that: The first preset angle is 90° (±15°); The second preset angle is 180°.

3. The hinge structure according to claim 1, characterized in that: During the closing process of the hinge structure, when the opening angle is less than the first preset angle, the spring pushes the cam to start deflecting, so that the transverse slider and the motor seat start to reset.

4. The hinge structure according to claim 1, characterized in that: The cam elastic pressing mechanism comprises two transverse sliders, two longitudinal sliders and a cam, and two ends of the spring respectively press against the two longitudinal sliders.

5. The hinge structure according to claim 4, characterized in that: Both ends of the engine seat are provided with a horizontal slide groove and a vertical slide groove; The transverse sliding block is slidably disposed in the transverse sliding groove, and the longitudinal sliding block is slidably disposed in the vertical sliding groove.

6. The hinge structure according to claim 1, characterized in that: The cam elastic pressing mechanism also includes: The damper has two ends respectively connected to the two longitudinal sliding blocks.

7. The hinge structure according to claim 6, characterized in that: The cam elastic pressing mechanism includes one or more dampers; The hinge structure includes one or more cam elastic pressing mechanisms.

8. The hinge structure according to any one of claims 1 to 7, characterized in that: Also includes: The cover plate is screwed onto the engine seat.

9. The hinge structure according to any one of claims 1 to 7, characterized in that: The linkage assembly comprises: The linkage block has one end hinged to the fixed base. A connecting rod, one end of which is hinged to the fixed machine base, and the other end of which is hinged to the transverse slide block; The linkage fork has one end hinged to the other end of the linkage block, the other end hinged to the engine seat, and the middle end hinged to the middle end of the linkage rod.

10. The hinge structure according to claim 7, characterized in that: Spacer rings are arranged at the hinged positions among the linkage block, the linkage rod and the linkage fork.

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