CN203585058U - Short-stroke hinge and its positioning device - Google Patents

Abstract

A short-stroke pivot device and a positioning device thereof are provided, the short-stroke pivot device comprises a rotating shaft, a positioning device and a torsion spring, the positioning device is sleeved on the rotating shaft and comprises a fixed cam and a rotating cam which can rotate relatively, the fixed cam is provided with two convex abutting parts, two elastic positioning bodies are bridged on the rotating cam in an arch shape, the top surface of each elastic positioning body is provided with a positioning hole, the rotating shaft penetrates through the fixed cam and rotates together with the rotating cam, and the free end of the torsion spring sleeve rotates together with the rotating shaft. Therefore, when the rotating shaft rotates, the convex abutting parts press the elastic positioning bodies to be clamped in the corresponding positioning holes, and when the rotating shaft rotates reversely, the convex abutting parts are separated from the corresponding positioning holes, and the rotating shaft is restored to the original position through the restoring force of the torsion spring.

Description

Short-stroke hinge and its positioning device

technical field

The utility model relates to a short-stroke pivot device, especially a pivot device which utilizes a rotating cam and a fixed cam to rotate each other, so that the convex part of the fixed cam is caught in the positioning hole of the arched elastic positioning body of the rotating cam to achieve the positioning effect. .

Background technique

According to traditional notebook computers, handheld translators, personal portable data processors (PDAs) and other digital product screen panels and hosts, most of them use hinges to achieve the purpose of mutual connection and assembly. However, most of the hinges used in the above-mentioned digital products can only provide a pivoting and supporting function for the panel. When using the above-mentioned digital products, the user must lift the panel to the position with his hands before he can use the digital product. The input elements (such as keyboard, etc.) on the main unit of the product perform command input operations. However, when the panel is lifted, most of the digital product main unit itself needs to be fixed with one hand before the panel of the product can be lifted with the other hand. It is very cumbersome and inconvenient. Moreover, after the hinge device of the aforementioned digital product reaches the pivoting position, it can no longer rotate. At this time, once the panel is hit by an external force, it is easy to cause the host and the panel to vibrate and damage the precision circuit inside the host. Cause adverse effects, and in serious cases may also damage the structure of the hinge itself. In addition, the existing hinges are usually provided with an interfering component that can rotate relatively. The interference assembly includes a pair of convex and concave wheels oppositely arranged, and a corresponding pair of protrusions and depressions are respectively arranged on them. When the relative rotation is made, the protrusions on the cams fall into the depressions on the concave wheels to achieve the above-mentioned automatic positioning. Effect. However, due to the long travel distance between the convex and concave wheels, when the panel of the digital product is opened, the rotation angle between the convex and concave wheels is large, so it often needs enough external force to overcome the interference caused by the movement of the assembly. friction torque. Moreover, the above-mentioned convex and concave wheels are not elastic, so they are easy to shorten the service life due to mutual wear.

To sum up, it is necessary to propose a short-stroke hinge and its positioning device that is reasonably designed and can effectively improve the above-mentioned deficiencies.

Contents of the invention

The main purpose of the present invention is to provide a short-stroke hinge, which can be installed between the electronic device and the rotating bracket, so that the rotating bracket can be easily accommodated in the electronic device, and can be easily opened relative to the electronic device.

The secondary purpose of the present invention is to provide a short-stroke hinge, which can realize the effect of automatic lifting, buffer pivoting and positioning of the rotating bracket of the electronic device.

In order to achieve the above-mentioned purpose, the utility model provides a short-stroke hinge, which includes: a rotating shaft; a positioning device, which is sleeved on the rotating shaft, and the positioning device includes a fixed cam and a rotating cam that can rotate relatively. One side of the fixed cam is provided with two protrusions, and one side of the rotating cam adjacent to the fixed cam is provided with two elastic positioning bodies, and the two elastic positioning bodies are bridged to the rotating cam in an arched shape. A horizontal sliding part is formed between them, the top surface of each elastic positioning body has a positioning hole, the rotating shaft passes through the fixed cam and rotates together with the rotating cam; and a torsion spring has a fixed end and a The free end, the torsion spring is sleeved on the rotating shaft and the free end rotates together with the rotating shaft; wherein, when the rotating shaft is subjected to rotational pressure, each of the protrusions slides along the sliding part to press the corresponding The elastic positioning body is locked in the positioning hole; wherein, when the rotating shaft is given a reverse rotational pressure, each of the protrusions breaks away from the corresponding positioning hole, and the restoring force of the torsion spring Return the rotating shaft to its original position.

In one embodiment of the short-stroke hinge device of the present invention, the two elastic positioning bodies are separated by 180 degrees, the direction of the line connecting the two elastic positioning bodies defines a rotation axis, and the connection of the two protrusions The line direction defines a fixed axis with a variable angle between the rotational axis and the fixed axis.

In one embodiment of the short-stroke hinge device of the present invention, each of the elastic positioning bodies has two opposite guide slopes and two opposite end surfaces, and the two guide slopes are inclined from both sides of the top surface respectively. Extending to the rotating cam, the rotating axis is perpendicular to the two end faces, there is a slot between one of the two end faces and the rotating cam, and the two guide slopes have a groove with the positioning hole respectively. travel distance.

In one embodiment of the short-stroke hinge device of the present invention, the rotating shaft has a circular shaft and a non-circular shaft, the non-circular shaft protrudes from one end of the circular shaft, and the fixed The cam has a circular hole for the circular shaft to pass through, and the rotating cam has a non-circular hole for the non-circular shaft to pass through and rotate together with the rotating shaft.

In one embodiment of the short-stroke hinge device of the present invention, a threaded portion is provided on the end of the non-circular shaft, and a nut is fixed on the threaded portion so that the torsion spring generates a compressive force and makes the rotating shaft stop. at any rotation angle.

In one embodiment of the short-stroke hinge device of the present invention, it also includes a fixed base rotatably mounted on the rotating shaft, the fixed base has a first end surface and a second end surface opposite to each other, and the first end surface and the second end surface A first shaft hole and a second shaft hole are formed through the two end faces respectively, the first end face is provided with an assembly hole next to the first shaft hole, and the second end face is provided with a positioning hole next to the second shaft hole. The rotating shaft is set through the first shaft hole and the second shaft hole, the fixed end of the torsion spring is inserted and fixed in the positioning hole, the fixed cam is fixed in the assembly hole, and the peripheral edge of the fixed cam protrudes The protrusion engaged in the assembly hole is used to prevent the fixed cam from rotating relative to the fixed base.

In one embodiment of the short-stroke hinge device of the present invention, the positioning device further includes a limiting wheel, and the limiting wheel has a non-circular guide hole through which the non-circular shaft passes, and rotates together with the rotating shaft , the rotating cam is interposed between the limiting wheel and the fixed cam, and a limiting block is protruded from the periphery of the limiting wheel, and the first end surface of the fixed base has a first limiting surface and a first Two limiting surfaces, the limiting block is displaced between the first limiting surface and the second limiting surface to limit the rotation angle of the rotating shaft.

In one embodiment of the short-stroke hinge of the present invention, the torsion spring is further provided with a torsion wheel, and the periphery of the torsion wheel has a plurality of positioning grooves arranged at intervals, and the free end of the torsion spring is fixed to the plurality of positioning grooves. One of the positioning slots, so that the free end of the torsion spring rotates together with the rotating shaft, and the short-stroke hinge also includes a rotating bracket fixed on the rotating shaft and linked with the rotating shaft, the fixed base is fixed In an electronic device, the rotating shaft drives the rotating cam to rotate synchronously when the rotating bracket exerts rotational pressure on the rotating shaft, so that each of the protrusions is locked in the corresponding positioning hole, and the rotating axis and the fixed axis Overlapping, the rotating bracket is accommodated in the electronic device, and each of the protrusions breaks away from the corresponding positioning hole when the rotating bracket exerts a reverse rotational pressure on the shaft, and the restoring force of the torsion spring makes the The rotation axis returns to the original position, and the rotating bracket supports the electronic device.

On the other hand, the utility model also discloses a positioning device applied to a short-stroke hinge. The positioning device includes: a fixed cam, with two convex parts on one side; a rotating cam, which can be connected with the fixed cam For relative rotation, two elastic positioning bodies are provided on one side of the rotating cam adjacent to the fixed cam, and the two elastic positioning bodies are bridged to the rotating cam in an arched shape. The top surface of the elastic positioning body has a positioning hole; wherein, the short stroke hinge includes a rotating shaft and a torsion spring sleeved on the rotating shaft, the rotating shaft passes through the fixed cam and connects with the free end of the torsion spring and The rotating cam rotates together; wherein, when the rotating shaft is applied with rotational pressure, each of the protrusions slides along the sliding portion to press the corresponding elastic positioning body, and is locked in the positioning hole; wherein, When the rotating shaft is given reverse rotational pressure, each of the protrusions breaks away from the corresponding positioning hole, and the rotating shaft returns to its original position by the restoring force of the torsion spring.

In one embodiment of the positioning device of the present invention, the two elastic positioning bodies are separated by 180 degrees, the direction of the line connecting the two elastic positioning bodies defines a rotation axis, and the direction of the line connecting the two protrusions A fixed axis is defined, and there is a variable angle between the rotation axis and the fixed axis, and each of the elastic positioning bodies has two opposite guide slopes and two opposite end surfaces, and the two guide slopes are respectively Extending obliquely from both sides of the top surface to the rotating cam, the rotating axis is perpendicular to the two end surfaces, there is a slot between one of the two end surfaces and the rotating cam, and the two guides The slopes have a stroke distance from the positioning holes respectively.

The utility model has at least the following advantages: the utility model relates to a short-stroke hinge and its positioning device. When the rotating bracket of the electronic device is about to be opened, the elastic force of the torsion spring can be used to drive the rotating cam to open the rotating bracket. So the swivel stand can be popped open with just one hand. In addition, the short-stroke hinge of the utility model has the structural design of the arched elastic positioning body of the rotating cam and the convex part of the fixed cam, so that when the convex part is locked or disengaged from the arched elastic positioning body, it has the advantages of labor-saving and reduction. Advantages of abrasion.

The above descriptions about the content of the utility model and the following descriptions of the embodiments are used to exemplify and explain the principle of the utility model, and provide further explanation of the scope of the claims of the utility model.

Description of drawings

Fig. 1 is a three-dimensional exploded view of a short-stroke hinge device of the present invention;

Fig. 2 is a three-dimensional exploded view of another angle of the short-stroke hinge device of the present invention;

Fig. 3 is a three-dimensional exploded view of the fixed cam and the rotating cam of the short-stroke hinge device of the present invention;

Fig. 4 is a three-dimensional combination diagram of the short-stroke hinge device of the present invention;

Figure 5A is a schematic cross-sectional view (1) of the action of the short-stroke hinge device of the present invention;

Fig. 5B is a schematic diagram of the short-stroke hinge of the present invention with an electronic device in Fig. 5A;

Figure 6A is a schematic cross-sectional view (2) of the action of the short-stroke hinge device of the present invention; and

FIG. 6B is a schematic diagram of the short-stroke hinge of the present invention in FIG. 6A collocated with an electronic device.

Wherein, the reference signs are explained as follows:

100 short stroke hub

1 shaft

11 round shaft

12 non-circular shaft

121 threaded part

2 positioning device

20 fixed cam

201 convex part

202 round hole

203 bump

21 Turn the cam

211 elastic positioning body

211a top surface

211b Positioning hole

211c guide slope

211d end face

212 sliding department

213 non-circular hole

22 limit wheel

221 limit block

222 non-circular guide hole

3 torsion springs

30 fixed end

31 free end

4 nuts

5 fixed base

51 first end face

511 First shaft hole

512 assembly hole

513 The first limiting surface

514 The second limiting surface

52 second end face

521 Second shaft hole

522 positioning hole

6 torque wheels

61 positioning slot

7 Spacers

200 electronic devices

201 Backplane

300 swivel stand

C1 Axis of rotation

C2 fixed axis

A Slotted

Detailed ways

The embodiments described below have mentioned numbers or their analogs, unless otherwise specified, the scope of application of the present utility model should not be limited by the numbers or their analogs. The short-stroke hinge 100 of the present invention is particularly suitable for the electronic device 200 with the rotating bracket 300 , but the scope of application of the present invention is not limited thereby.

Please refer to Fig. 1 to Fig. 4, the utility model provides a short-stroke hinge device 100, which mainly includes a rotating shaft 1, a positioning device 2 and a torsion spring 3; wherein, the positioning device 2 is sleeved on the rotating shaft 1, And the positioning device 2 includes a fixed cam 20 and a rotating cam 21 which are relatively rotatable.

The shaft 1, in this embodiment, the shaft 1 can have a circular shaft 11 and a non-circular shaft 12, and the non-circular shaft 12 protrudes from one end of the circular shaft 11; An end of the circular shaft 12 is provided with a threaded portion 121 so that a nut 4 is fixed on the threaded portion 121 .

The torsion spring 3 has a fixed end 30 and a free end 31, and the torsion spring 3 is sleeved on the rotating shaft 1 and the free end 31 rotates with the rotating shaft 1; in this embodiment, the torsion spring 3 is further provided with a torsion wheel 6; wherein, since the periphery of the torsion wheel 6 has a plurality of positioning grooves 61 arranged at intervals, and the free end 31 of the torsion spring 3 is fixed to one of these positioning grooves 61, the free end 31 of the torsion spring 3 can be It rotates together with the rotating shaft 1.

The fixed cam 20 can have two protrusions 201 on one side; in this embodiment, the fixed cam 20 has a circular hole 202 through which the circular shaft 11 of the rotating shaft 1 can pass, so that the rotating shaft 1 can rotate Pass through the fixed cam 20.

Rotating cam 21, one side adjacent to fixed cam 20 can be provided with two elastic positioning bodies 211 corresponding to two protrusions 201, as shown in Figure 1 and Figure 3, two elastic positioning bodies 211 are bridged on rotating cam 21 in an arched shape (That is, one side arch protrusion of the rotating cam 21 forms two elastic positioning bodies 211), which is used to increase the elasticity of the two elastic positioning bodies 211 when compressed. Between the two elastic positioning bodies 211, a horizontal sliding portion 212 is formed on one side of the rotating cam 21, which is used as a track for the sliding of the two protrusions 201 (when the rotating cam 21 and the fixed cam 20 rotate relatively), And the top surface 211a of each elastic positioning body 211 has a positioning hole 211b. In this embodiment, the rotating cam 21 has a non-circular hole 213 through which the non-circular shaft 12 of the rotating shaft 1 can pass. Correspondingly, the rotating cam 21 can be driven by the rotating shaft 1 to rotate synchronously. Please refer to FIG. 3 , the two elastic positioning bodies 211 are spaced 180 degrees apart from each other, and each elastic positioning body 211 has two opposite guide slopes 211c and opposite end surfaces 211d; It extends obliquely to one side of the rotating cam 21 , and the two end surfaces 211 d extend from the edge near the non-circular hole 213 to the outer edge of the rotating cam 21 . If the connection direction of the two elastic positioning bodies 211 of the rotating cam 21 defines a rotation axis C1, and the connection direction of the two protrusions 201 of the fixed cam 20 defines a fixed axis C2, then the rotation axis C1 passes through the two end faces 211d, and rotates There is a variable angle Θ (not shown) between the axis C1 and the fixed axis C2, and the variable angle Θ can be changed as the rotating cam 21 rotates relative to the fixed cam 20; A new type of short stroke hub 100.

The short-stroke hinge 100 of the present utility model, as shown in Figures 1 and 2, may further include a fixed base 5 rotatably mounted on the rotating shaft 1; in this embodiment, the fixed base 5 has an opposite second An end surface 51 and a second end surface 52 , and the first end surface 51 has a first limiting surface 513 and a second limiting surface 514 . The first end surface 51 and the second end surface 52 are formed through a first shaft hole 511 and a second shaft hole 521 respectively, so that the rotating shaft 1 is penetrated through the first shaft hole 511 and the second shaft hole 521; wherein, due to the first The shape of the circular hole (not labeled) of the shaft hole 511 and the circular hole (not labeled) of the second shaft hole 521 does not correspond to the cross-sectional shape of the non-circular shaft 12 of the rotating shaft 1, so that the fixed base 5 does not Does not rotate with axis 1. The first end surface 51 is provided with an assembly hole 512 on the side of the first shaft hole 511, and the second end surface 52 is provided with a positioning hole 522 on the side of the second shaft hole 521, so that the fixed end 30 of the torsion spring 3 is inserted and fixed in the positioning position. In the hole 522 , and the fixed cam 20 is fixed in the assembly hole 512 . In this embodiment, the torsion spring 3 is set between the first end surface 51 and the second end surface 52, and a torsion wheel 6 can be further provided on the torsion spring 3, and the periphery of the torsion wheel 6 has a plurality of spaced positioning Groove 61; Wherein, since the fixed end 30 of torsion spring 3 is inserted and fixed in the positioning hole 522, and the free end 31 of torsion spring 3 is fixed in one of them of these positioning grooves 61, so the fixed end 30 of torsion spring 3 Relative to the fixed base 5 , the free end 31 of the torsion spring 3 can rotate together with the rotating shaft 1 . In addition, a protrusion 203 can be protruded from the periphery of the fixed cam 20 and engaged with the assembly hole 512 to prevent the fixed cam 20 from rotating relative to the fixed base 5 .

The short-stroke hinge 100 of the present utility model can further include a rotating bracket 300 fixed on the rotating shaft 1 and linked with the rotating shaft 1; preferably, the rotating bracket 300 is fixed on the non-circular shaft rod 12 of the rotating shaft 1, so that the fixed The base 5 is interposed between the positioning device 2 and the rotating bracket 300 , and the rotating bracket 300 rotates synchronously with the rotating shaft 1 .

The positioning device 2 of the short-stroke hinge device 100 of the present invention may further include a limit wheel 22, as shown in Figures 1 and 2, which has a non-circular shaft 12 for the shaft 1 to pass through. shaped guide hole 222 to rotate together with the rotating shaft 1, and the rotating cam 21 is arranged between the limiting wheel 22 and the fixed cam 20; Position block 221, so that the limit block 221 swings between the first limit surface 513 and the second limit surface 514 of the fixed base 5, in order to limit the rotation angle of the rotating shaft 1 (that is, limit the swing angle of the rotating bracket 300 ).

When the utility model is assembled, as shown in Figure 1 and Figure 2, firstly, the non-circular shaft 12 of the rotating shaft 1 is passed through the second shaft hole 521 of the fixed base 5, and then the torsion spring 3 and the torsion wheel 6 are inserted successively Set on the non-circular shaft 12 of the rotating shaft 1, and insert the fixed end 30 of the torsion spring 3 into the positioning hole 522, and insert the free end 31 of the torsion spring 3 into the positioning grooves 61 of the torsion wheel 6 One of them, and then pass the non-circular shaft 12 through the first shaft hole 511 of the fixed base 5, so that the torsion spring 3 is assembled between the first end surface 51 and the second end surface 52 of the fixed base 5, Afterwards, the fixed cam 20, the rotating cam 21 and the limiting wheel 22 are successively sleeved on the non-circular shaft rod 12, and the protrusion 203 of the fixed cam 20 is inserted into the assembly hole 512 of the fixed base 5, and the position is limited. The limit block 221 of the wheel 22 is interposed between the first limit surface 513 and the second limit surface 514 of the fixed base 5,

The threaded portion 121 of the non-circular shaft 12 passes through the first shaft hole 511 , and then the gasket 7 is placed on the non-circular shaft 12 , and the nut 4 is locked on the threaded portion 121 to complete the assembly. The short-stroke pivot device 100 provided by the utility model is easy to assemble and easy to operate, so the manufacturing cost can be greatly reduced.

In addition, as shown in FIG. 3 , each elastic positioning body 211 of the rotary cam 21 has two opposite guide slopes 211c and two opposite end surfaces 211d, wherein one of the two end surfaces 211d of each elastic positioning body 211 is compatible with the rotary cam. There may be a slot A between one side of the 21, so that the elastic positioning body 211 is more compressible and resilient relative to the rotating cam 21, so the use of the protrusion 201 to engage/disengage the positioning hole 211b can be greatly increased times, and then the service life of the rotating cam 21 and the fixed cam 20 can be extended. In addition, due to the excellent compressibility and resilience of the elastic positioning body 211 itself, the convex portion 201 of the fixed cam 20 can be more firmly engaged in the corresponding positioning hole 211b, so that the convex portion 201 of the fixed cam 20 is not easy to be damaged due to a slight impact from an external force. The portion 201 is disengaged from the positioning hole 211b. Furthermore, since the two guide slopes 211c of the elastic positioning body 211 have a travel distance (not labeled) with the positioning hole 211b respectively, that is, the distance from the top edge (not labeled) of the guide slope 211c of the elastic positioning body 211 to the positioning hole 211b is short. , so the convex part 201 of the fixed cam 20 only needs to be rotated by a small angle to engage/disengage from the positioning hole 211b of the corresponding rotating cam 21. In other words, referring to FIG. 5A and FIG. The stroke of the device is relatively short, so not only can the labor-saving effect be achieved, but also the service life can be prolonged because the wear between the fixed cam 20 and the rotating cam 21 can be reduced.

Please refer to Fig. 5A, Fig. 5B, Fig. 6A and Fig. 6B. Fig. 5A is a schematic cross-sectional view (1) of the action of the short-stroke hinge device of the present invention, and Fig. 5B is a schematic diagram of the short-stroke pivot device of the present utility model with an electronic device in Fig. 5A , FIG. 6A is a schematic cross-sectional view (2) of the action of the short-stroke hinge device of the present invention, and FIG. 6B is a schematic diagram of the short-stroke hinge device of the present invention with an electronic device in FIG. 6A. First, as shown in Figure 5A and Figure 5B, when the short-stroke hinge 100 of the present invention is in use, its fixing base 5 can be installed on the back plate 201 of an electronic device 200, and the rotating shaft 1 can be fixed on a rotating Bracket 300. Please refer to FIG. 5A and FIG. 5B together with FIG. 3 . When the rotating bracket 300 exerts rotational pressure on the rotating shaft 1, the rotating bracket 300 will drive the rotating shaft 1 to rotate (as shown by the arrow in FIG. 5A ). The circular shaft 12 and the non-circular hole 213 of the rotating cam 21 are non-circular, so the rotating cam 21 will also rotate synchronously, but the first shaft hole 511 of the fixed base 5 and the circular hole 202 of the fixed cam 20 All are circular, and the fixed base 5 and the fixed cam 20 will not rotate accordingly. Because the fixed end 30 of the torsion spring 3 is fixed on the fixed base 5, the free end 31 of the torsion spring 3 will be twisted and stored elastic force due to the drive of the torsion wheel 6. At this time, due to the rotation of the rotating cam 21 relative to the fixed cam , so that the variable angle Θ (not shown) between the rotation axis C1 ( FIG. 3 ) and the fixed axis C2 ( FIG. 3 ) is reduced, so each convex portion 201 can slide along the horizontal sliding portion 212 to the guide slope 211c, and move along the guide slope 211c toward the positioning hole 211b, and at the same time press the elastic positioning body 211, and make the elastic positioning body 211 be deformed under pressure. At this time, the rotating cam 21 continues to rotate at a small angle relative to the fixed cam 20, as shown in Figure 6A and Figure 6B, so that the convex part 201 can be rotated from the top edge of the guide inclined surface 211c to the corresponding positioning hole 211b, and locked in The positioning hole 211 b provides an automatic locking function, so that the rotating bracket 300 is fixedly stored on the back plate 201 of the electronic device 200 .

Similarly, please refer to FIG. 6A, FIG. 6B and as shown in FIG. 3 , when the rotating bracket 30 exerts a reverse rotation pressure on the rotating shaft 1 (as shown by the arrow in FIG. 6A ), each protrusion 201 can be disengaged from the corresponding The positioning hole 211b of the elastic positioning body 211 is short because the distance from the positioning hole 211b of the elastic positioning body 211 to the guide inclined surface 211c is short, so the rotating bracket 300 only needs to apply a small amount of rotational pressure to the rotating shaft 1 to make each protrusion 201 automatically The positioning hole 211b rotates to the guide inclined surface 211c, and slides down to the horizontal sliding part 212 along the guide inclined surface 211c; then, as shown in Figure 5A and Figure 5B, the rotating shaft 1 is returned to its original position by the restoring force of the torsion spring 3 (That is, the position where the limit block 221 of the limit wheel 22 abuts against the second limit surface 514), at this time, the rotating bracket 300 will also be lifted away from the electronic device 200 by the restoring force of the torsion spring 3, and used to support Electronic device 200.

To sum up, the short-stroke hinge device 100 of the present invention has the function that the user can easily lift the rotating bracket 300 to support the electronic device 200 with one hand. Therefore, the short-stroke hinge device 100 of the present invention only makes the two positioning holes 211b of the elastic positioning body 211 of the rotating cam 21 respectively contact with the two protrusions of the fixed cam 20 when the rotating bracket 300 is stored in the electronic device 200 201 corresponds to the latch to form an automatic locking situation, so the short-stroke hinge 100 of the present invention provides a one-way automatic locking function.

On the other hand, please refer to FIG. 1 again. The short-stroke hinge device 100 of the present invention can also be fixed on the threaded part 121 of the rotating shaft 1 through the nut 4 according to the user's viewing angle preference for the electronic device 200. The torsion spring 3 generates a compressive force, so that the rotating shaft 1 stays at any rotation angle, and then the rotation bracket 300 stays at any rotation angle, that is to say, the rotation bracket 300 can be positioned at any angle relative to the electronic device 200 without falling over, so The purpose of adjusting the viewing angle of the electronic device 200 is achieved. Thereby, the short-stroke hinge 100 of the present invention has the functions of enabling the rotating bracket 300 of the electronic device 200 to achieve automatic lifting, buffer pivoting and positioning effects.

The present invention further provides a positioning device 2 applied to the above-mentioned short-stroke pivot device 100. The actual structure and actuation method of the positioning device 2 have been described in the above-mentioned embodiments in detail, so they will not be repeated here.

In addition, it should be particularly noted here that the directional terms mentioned in the present invention, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the present invention.

Therefore, the biaxial hinge of the present invention has the following characteristics and functions:

1. The short-stroke hinge device of the present invention utilizes the positioning hole of the convex part to engage/detach from the positioning hole of the elastic positioning body, so that the rotating bracket can be easily accommodated in the electronic device, and can be easily opened relative to the electronic device.

2. The short-stroke hinge device of the utility model is easy to assemble and easy to operate, so that the manufacturing cost and assembly time are greatly reduced.

3. The short-stroke hinge device of the present invention has grooves on the end surface of the elastic positioning body, so as to make the convex part more stable and engage the elastic positioning body, reduce the wear between the fixed cam and the rotating cam, and prolong the service life .

4. The short-stroke hinge device of the present utility model only makes the convex part engage/detach from the elastic positioning body when the rotating bracket is stored in the electronic device, thus forming a short-stroke hinge device with one-way automatic locking function.

To sum up, the utility model has met the requirements of a utility model patent, and the application is filed in accordance with the law. However, the content disclosed above is only a preferred embodiment of the utility model, which cannot limit the scope of the claims of the utility model. Therefore, the equal changes or modifications made according to the scope of the claims of the utility model still belong to this utility model. The scope covered by the utility model.

Claims (10)

1. A short-stroke hinge, characterized in that it comprises: a rotating shaft; A positioning device, which is sheathed on the rotating shaft, the positioning device includes a fixed cam and a rotating cam that can rotate relatively, one side of the fixed cam is provided with two protrusions, and the rotating cam is adjacent to a side of the fixed cam Two elastic positioning bodies are arranged on the side, and the two elastic positioning bodies are bridged to the rotating cam in an arch shape. A horizontal sliding part is formed between the two elastic positioning bodies. The top of each elastic positioning body The surface has a positioning hole, the rotating shaft passes through the fixed cam and rotates together with the rotating cam; and A torsion spring, which has a fixed end and a free end, the torsion spring is sleeved on the rotating shaft and the free end rotates together with the rotating shaft; Wherein, each of the protrusions slides along the sliding part to press the corresponding elastic positioning body when the rotating shaft is applied with rotational pressure, and is locked in the positioning hole; Wherein, each of the protrusions is disengaged from the corresponding positioning hole when the rotating shaft is subjected to reverse rotational pressure, and the rotating shaft returns to its original position by the restoring force of the torsion spring. 2. The short-stroke hinge device according to claim 1, characterized in that, the two elastic positioning bodies are separated by 180 degrees, the line direction of the two elastic positioning bodies defines a rotation axis, and the two convex positioning bodies The direction of the connecting lines of the contact portions defines a fixed axis, and there is a variable included angle between the rotation axis and the fixed axis. 3. The short-stroke hinge device according to claim 2, wherein each of the elastic positioning bodies has two opposite guide slopes and two opposite end surfaces, and the two guide slopes respectively start from the top surface Both sides extend obliquely to the rotating cam, the rotating axis is perpendicular to the two end faces, there is a slot between one of the two end faces and the rotating cam, and the two guide inclined surfaces are respectively connected to the rotating cam The positioning hole has a travel distance. 4. The short-stroke hinge device according to claim 3, wherein the rotating shaft has a circular shaft and a non-circular shaft, and the non-circular shaft protrudes from one end of the circular shaft The fixed cam has a circular hole for the circular shaft to pass through, and the rotating cam has a non-circular hole for the non-circular shaft to pass through to rotate together with the rotating shaft. 5. The short-stroke hinge device according to claim 4, wherein a threaded portion is provided on the end of the non-circular shaft, and a nut is fixed on the threaded portion so that the torsion spring generates a compressive force, and Make the shaft stop at any rotation angle. 6. The short-stroke hinge device according to claim 4, further comprising a fixed base rotatably mounted on the rotating shaft, the fixed base has opposite first end faces and second end faces, the first The end face and the second end face are formed with a first shaft hole and a second shaft hole respectively, the first end face is provided with an assembly hole beside the first shaft hole, and the second end face is provided with a shaft hole beside the second shaft hole. The positioning hole, the rotating shaft is set through the first shaft hole and the second shaft hole, the fixed end of the torsion spring is inserted and fixed in the positioning hole, the fixed cam is fixed in the assembly hole, and the fixed cam A protruding block engaged with the assembling hole protrudes from the periphery to prevent the fixed cam from rotating relative to the fixed base. 7. The short-stroke hinge device according to claim 6, wherein the positioning device further comprises a limiting wheel, and the limiting wheel has a non-circular guide hole through which the non-circular shaft passes and is compatible with The rotating shaft rotates together, the rotating cam is interposed between the limit wheel and the fixed cam, and a limit block is protruded from the periphery of the limit wheel, and the first end surface of the fixed base has a first limit surface and a second limiting surface, and the limiting block is displaced between the first limiting surface and the second limiting surface to limit the rotation angle of the rotating shaft. 8. The short-stroke hinge device according to claim 7, characterized in that, the torsion spring is also provided with a torsion wheel, the periphery of the torsion wheel has a plurality of positioning grooves arranged at intervals, and the free end of the torsion spring is fixed on One of the plurality of positioning slots is used to make the free end of the torsion spring rotate together with the rotating shaft, and the short-stroke hinge also includes a rotating bracket fixed on the rotating shaft and linked with the rotating shaft. The base is fixed on an electronic device, and the rotating shaft drives the rotating cam to rotate synchronously when the rotating bracket exerts rotational pressure on the rotating shaft, so that each of the protrusions is locked in the corresponding positioning hole, and the rotating axis Overlapping with the fixed axis, the rotating bracket is accommodated in the electronic device, and each of the protrusions breaks away from the corresponding positioning hole when the rotating bracket exerts reverse rotational pressure on the rotating shaft, and passes through the torsion spring. The restoring force restores the rotation axis to its original position, and the rotating bracket supports the electronic device. 9. A positioning device applied to a short-stroke hinge, characterized in that the positioning device includes: a fixed cam with two protrusions on one side; and A rotating cam, which can rotate relative to the fixed cam, two elastic positioning bodies are arranged on one side of the rotating cam adjacent to the fixed cam, and the two elastic positioning bodies are bridged to the rotating cam in an arched shape, and the two A horizontal sliding portion is formed between the two elastic positioning bodies, and each elastic positioning body has a positioning hole on its top surface; Wherein, the short stroke hinge includes a rotating shaft and a torsion spring sleeved on the rotating shaft, the rotating shaft passes through the fixed cam and rotates together with the free end of the torsion spring and the rotating cam; Wherein, each of the protrusions slides along the sliding part to press the corresponding elastic positioning body when the rotating shaft is applied with rotational pressure, and is locked in the positioning hole; Wherein, each of the protrusions is disengaged from the corresponding positioning hole when the rotating shaft is subjected to reverse rotational pressure, and the rotating shaft returns to its original position by the restoring force of the torsion spring. 10. The positioning device according to claim 9, wherein the two elastic positioning bodies are separated by 180 degrees, the line direction of the two elastic positioning bodies defines a rotation axis, and the two protrusions The direction of the connecting line defines a fixed axis, and there is a variable angle between the rotation axis and the fixed axis, and each of the elastic positioning bodies has two opposite guide inclined surfaces and two opposite end surfaces, and the two Two guide inclined surfaces extend obliquely from both sides of the top surface to the rotating cam respectively, the rotating axis is perpendicular to the two end surfaces, and there is a slot between one of the two end surfaces and the rotating cam, so that The two guide slopes have a stroke distance from the positioning hole respectively.

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