CN201071877Y - Pivot device - Google Patents

Abstract

The utility model discloses a pivot device, including rotating the cam, it is equipped with the slip cam to rotate the cam lower part. The lower part of the sliding cam is propped against a compression spring. A damping body is arranged on the rotating cam, and a damping limiting shell is sleeved outside the damping body. The lower part of the damping body is provided with an annular shell, an annular shell platform and an annular sleeve, and the inner side of the annular sleeve is provided with a sealing ring groove. The middle part of the upper end surface of the rotating cam is upwards provided with a first annular table and a second annular table in a protruding mode, and the middle part of the second annular table is provided with an annular groove. An outer sealing ring is arranged between the damping body and the rotating cam, and an inner sealing ring is arranged in a sealing ring groove. The lower surface of the damping body is fitted with the upper surface of the rotating cam. Damping oil is sealed between the lower surface of the damping body and the upper surface of the rotating cam through an outer sealing ring and an inner sealing ring. The hinge device can hardly generate vibration when the electronic product is opened and folded, thereby better protecting the electronic product, ensuring that the electronic product is more comfortable to use and avoiding falling from hands.

Description

hub

The utility model relates to a hinge device, in particular to a hinge device mainly used in foldable electronic products such as mobile phones, PDAs and notebook computers.

Background technique

For the convenience of people's work, study and communication, various electronic products have appeared in recent years, such as mobile phones, electronic dictionaries, PDAs, MP3 and MP4, etc. These electronic products usually have audio-visual functions. In order to make the image clear and easy to watch, the display interface of the product needs to be as large as possible; however, for the convenience of portability, the volume of these electronic products needs to be as small as possible. In order to solve the contradiction between large display interface and small volume, many electronic products are designed as two parts folded together, and the two parts of electronic products are usually connected by a hinge.

A current hinge is shown in Figure 1, which includes a housing 3', a rotating cam 6' is provided at one end of the housing 3', and a sliding cam 5' is slidably installed inside the housing 3' , The housing 3' is also equipped with a compression spring 4' against the sliding cam 5'. The rotating cam 6' has a push portion 61', and the end surface of the sliding cam 5' has a circumferential sliding cam curved surface 51' composed of an ascending section curved surface and a descending section curved surface. This hinge is used on foldable electronic products, when the two folded parts of the electronic product are opened to a certain angle, that is, when the apex of the push part 61' of the rotating cam 6' slides over the sliding cam surface 51' of the sliding cam 5' After the highest point, even if the force is stopped, the electronic product can still be opened automatically due to the rotation effect of the compression spring 4' and the sliding cam surface 51' on the push part 61'.

However, under the rotation effect of the compression spring 4' and the sliding cam surface 51' on the push part 61', the electronic product will be opened faster and faster, so that there will be a gap between the two folded parts of the electronic product when it is fully opened. Impact and cause vibration. When the two folding parts of the electronic product are folded, they will also be folded faster and faster, which will also produce impact and cause vibration. On the one hand, this vibration will have a bad effect on the performance of the electronic product itself, and on the other hand, if the user is not careful, the electronic product may fall.

Utility model content

The purpose of this utility model is to provide a hinge that can reduce the vibration when the electronic product is opened and folded, so as to better protect the electronic product and make the use of the electronic product more comfortable.

In order to achieve the above object, the utility model provides a pivot device, including a rotating cam, a sliding cam and a pressure spring, the lower part of the rotating cam has a push part, the upper end surface of the sliding cam has a circumferential sliding cam surface, and the sliding cam surface has a rising The curved surface of the section and the curved surface of the descending section, the push part of the rotating cam abuts against the curved surface of the sliding cam, and one end of the pressure spring abuts against the sliding cam, and a damping mechanism is matched with the rotating cam.

As mentioned above, since the hinge of the utility model adds a damping mechanism that cooperates with the rotating cam, after the electronic product using the hinge is opened to a certain extent, the push part of the rotating cam slides to the curved surface of the descending section of the sliding cam surface Finally, on the one hand, the electronic product can still be opened automatically due to the rotation effect of the pressure spring and the sliding cam surface on the push part of the rotating cam; on the other hand, due to the damping restriction of the damping mechanism, the automatic opening speed of the electronic product is getting faster The fast tendency can be limited to achieve a smooth and slow opening state, so that the two folding parts of the electronic product can hardly generate vibration when fully opened. The same principle applies to electronic products when they are folded together, and there is almost no vibration. Therefore, the hinge device of the utility model can better protect the electronic product, and also make the electronic product more comfortable to use and avoid falling from the hand.

Description of drawings

In the accompanying drawings

Fig. 1 is a three-dimensional exploded view of a conventional hub.

Fig. 2 is a three-dimensional combined view of the hinge device of the present invention, in order to show the internal structure, the shell and the damping limiting shell are partially cut away.

FIG. 3 is an exploded perspective view of the hub shown in FIG. 2 .

Fig. 4 is a perspective view of the damping and limiting shell in Fig. 2 .

Fig. 5 is a perspective view of the damping body in Fig. 2 .

Fig. 6 is a perspective view of another angle of the damping body shown in Fig. 5 .

FIG. 7 is a perspective view of the rotating cam in FIG. 2 .

FIG. 8 is a perspective view of the sliding cam in FIG. 2 .

The reference signs of each component in the figure are explained as follows:

[Background technique]

Housing 3’ Compression Spring 4’

Sliding Cam 5’ Sliding Cam Surface 52’

Rotate Cam 6’ Push 61’

[this utility model]

Snap ring 1 Limiting block 2

Shell 3 Compression spring 4

Sliding Cam 5 Sliding Cam Surface 51

Turn the cam 6 pusher 61

The first circular platform 62 The second circular platform 63

Shaft hole 64 Annular groove 65

Outer sealing ring 7 Inner sealing ring 8

Axis 11 Head 111

Card slot 112 Damping body 20

Boss 21 Shaft hole 22

Annular shell 23 Annular shell platform 24

Ring sleeve 25 Seal ring groove 26

Damping limit shell 30 Stopper 31

Limiting plane 32 Damping body hole 33

semicircular groove 34

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Referring to Fig. 2 and Fig. 3, the hinge device of the present utility model includes a rotating cam 6, and a sliding cam 5 is arranged on the lower part of the rotating cam 6. A casing 3 is sheathed on the outside of the sliding cam 5 , and the sliding cam 5 can slide relative to the casing 3 . The housing 3 is also equipped with a compression spring 4 against the lower part of the sliding cam 5 . A damping body 20 is arranged on the top of the rotating cam 6 , and the damping body 20 is covered with a damping limiting shell 30 . The lower surface of the damping body 20 cooperates with the upper surface of the rotary cam 6 . An outer sealing ring 7 is provided between the damping body 20 and the rotating cam 6 , and an inner sealing ring 8 is provided inside the damping body 20 . Damping oil (not shown) is sealed between the outer sealing ring 7 and the inner sealing ring 8 and the lower surface of the damping body 20 and the upper surface of the rotating cam 6 . A middle shaft 11 passes through the rotating cam 6, the sliding cam 5 and the pressure spring 4. An end portion of the central shaft 11 surrounds the central shaft 11 to define a locking groove 112 , and a snap ring 1 is disposed in the locking groove 112 . The snap ring 1 constrains a limiting pressure block 2 to the lower end of the housing 3 .

Please refer to Fig. 4, the damping limiting shell 30 is cylindrical as a whole, and its outer surface is provided with two limiting planes 32 extending axially along the damping limiting shell 30 for easy installation and fixing. Damping body bore 33 of damping body 20 . The damping body hole 33 is a blind hole, the top of which is provided with a fan-shaped block 31 , and the center of the block 31 is a semicircular groove 34 .

Please refer to FIG. 3 , FIG. 5 and FIG. 6 , the damping body 20 shown in the figure is generally cylindrical, and a shaft hole 22 penetrating up and down is provided in the middle. The central shaft 11 passes through the shaft hole 22 of the damping body 20 . The upper end surface of the damping body 20 is provided with a fan-shaped boss 21 . The boss 21 cooperates with the stopper 31 on the damping limiting shell 30 . The lower part of the damping body 20 is provided with an annular casing 23 , an annular casing platform 24 and an annular sleeve 25 , which are all ring-shaped. The inner side of the annular sleeve 25 is formed with a sealing ring groove 26 on the circumference of the shaft hole 22 . The inner sealing ring 8 is set in the sealing ring groove 26 and sleeved on the central shaft 11 .

Referring to FIG. 2 , FIG. 7 and FIG. 8 , the rotating cam 6 is provided with a rotating shaft hole 64 penetrating up and down, and the central shaft 11 passes through the rotating shaft hole 64 of the rotating cam 6 . The bottom of the rotating cam 6 is provided with a push portion 61 . The middle part of the upper end surface of the rotary cam 6 protrudes upwards with a first annular platform 62, and the inner side of the upper end surface of the first annular platform 62 upwards protrudes with a second annular platform 63, and the middle part of the second annular platform 63 is located on the circumference of the shaft hole 64. An annular groove 65 is provided. The upper end surface of the sliding cam 5 shown has a circumferential sliding cam curved surface 51 , and the sliding cam curved surface 51 has a curved surface of an ascending section and a curved surface of a descending section. The push portion 61 of the rotating cam 6 abuts against the sliding cam curved surface 51 of the sliding cam 5 .

Please refer to Fig. 2, Fig. 3 and Fig. 4, the upper end of the central axis 11 protrudes toward the circumference to form an annular head 111, the head 111 presses against the damping body 20 and is placed in the damping limiting shell 30 semicircular grooves at 34 places. The upper part of the damping body 20 protrudes into the damping body hole 33 of the damping limiting shell 30 .

Referring to FIG. 2 , FIG. 6 and FIG. 7 , the annular shell 23 on the damping body 20 fits outside the first annular platform 62 on the rotary cam 6 . The annular shell platform 24 on the damping body 20 is sleeved on the second annular platform 63 on the rotary cam 6 . The annular sleeve 25 on the damping body 20 is inserted into the annular groove 65 on the rotating cam 6 . The outer sealing ring 7 is sheathed on the first annular platform 62 on the rotating cam 6 , and the end surface of the annular shell 23 of the damping body 20 presses the outer sealing ring 7 on the end surface of the rotating cam 6 . Structures such as the first annular platform 62 on the rotary cam 6 and the second annular platform 63 and the annular shell 23, annular shell platform 24 and annular sleeve 25 of the damping body 20 bottom can increase the distance between the damping body 20 and the rotary cam 6. Cooperate with the area to enhance the damping effect.

When the hinge device of the utility model is in use, the housing 3 and the damping limit case 30 should be fixed on a folded part of the foldable electronic product, and the rotating cam 6 should be fixed on the other folded part of the foldable electronic product. Overlap part.

As mentioned above, when the electronic product using the hinge of the utility model is opened, the damping body 20 will rotate with the rotating cam 6 due to the suction of the damping oil, until the boss 21 on the damping body 20 touches the damping limiting shell 30 on one side of the stopper 31. At this time, the damping body 20 no longer rotates together with the rotating cam 6 and starts to play a damping role. If at this moment the push portion 61 of the rotating cam 6 slides to the descending curved surface of the sliding cam curved surface 51 of the sliding cam 5 and allows the electronic product to automatically open due to the rotation action produced by the electronic product pressure spring 4 and the sliding cam curved surface 51 on the pushing portion 61, damping The body 20 will restrict the tendency of the opening speed of the electronic product to be faster and faster and achieve a stable and slow opening state. In this state, the electronic product can produce almost no vibration when it is fully opened.

When the electronic product is folded, the damping body 20 will also rotate together with the rotating cam 6 due to the suction of the damping oil at the initial stage. At this time, the boss 21 on the damping body 20 is away from the side of the stopper 31 on the damping limit case 30 side until the boss 21 touches the other side of the stopper 31. At this moment, the damping body 20 no longer rotates with the rotating cam 6 and starts to play a damping effect. Segment curved surface is relative, and is related to the rotation direction of rotating cam 6) and allows the electronic product to be folded automatically by the rotation effect generated by the pressure spring 4 and the sliding cam curved surface 51 on the push part 61, and the damping body 20 will restrict the folding speed of the electronic product The trend is faster and faster and reaches a steady state of slow conversion. In this state, when the electronic product is fully folded, there is almost no vibration. Therefore, the hinge device of the utility model can better protect the electronic product, make the electronic product more comfortable to use and avoid falling from the hand.

The scope of protection of the utility model is not limited to the specific embodiments described above. In fact, various additions, modifications and substitutions will not deviate from the principle and spirit defined by the present invention. For example, the damping mechanism can also be a damper that cooperates with the rotating cam 6 . The housing 3 can also be replaced by a slot on a folded part of the electronic device.

Claims (5)

1. pivot device, comprise a rotating cam, a sliding cam and a pressing spring, the rotating cam bottom has the pushed section, the sliding cam upper-end surface has a circumferential sliding cam curved surface, sliding cam curved surface has ascent stage curved surface and descending branch curved surface, the pushed section of described rotating cam is resisted against on the sliding cam curved surface, and an end of pressing spring is resisted against on the sliding cam, it is characterized in that: be combined with a damping mechanism with rotating cam.

2. pivot device as claimed in claim 1 is characterized in that: described damping mechanism comprises a spacing shell of a damping and a damping body, and the spacing shell of this damping is provided with a block, and damping body is provided with a boss that cooperates with block.

3. pivot device as claimed in claim 2 is characterized in that: the lower surface of described damping body and the upper face of rotating cam cooperatively interact and are closed with damping oil by seal ring.

4. pivot device as claimed in claim 3, it is characterized in that: first annular table has raised up in the middle part of the upper-end surface of described rotating cam, the inboard, upper-end surface of first annular table second annular table that raised up, the rotating cam middle part is provided with the rotary shaft hole of up/down perforation, and second annular table middle part is provided with circular groove in the border of rotary shaft hole; Described damping body bottom is provided with and is placed in the outer circular casing of described first annular table, is placed in the outer circular casing platform of described second annular table and is inserted into the interior annular cover of circular groove, the middle part of damping body is provided with the axis hole of up/down perforation, and the inboard of annular cover is formed with seal groove in the border of axis hole; Passed an axis in the rotary shaft hole of rotating cam and the axis hole of damping body.

5. pivot device as claimed in claim 4 is characterized in that: be arranged with an exterior seal ring on first annular table on the described rotating cam, the end face of the circular casing of described damping body is squeezed in this exterior seal ring on the rotating cam; Be provided with an inner seal ring that is placed on the axis in the seal groove on the described damping body.

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