阅读说明：本技术 可调整定位的合页 (Adjustable positioning hinge ) 是由 李旭斌 于 2020-08-20 设计创作，主要内容包括：本发明提供一种可调整定位的合页,包括：第一页板,包括一体成型的第一基板、第一套筒和第二套筒,位于第一套筒和第二套筒之间的第一基板厚度方向的边缘为侧压边,第一套筒设有一滑动槽；第二页板,包括一体成型的第二基板和第三套筒,第三套筒位于第一套筒和第二套筒之间,第一套筒、第二套筒和第三套筒中空空间贯穿以形成一通孔,第三套筒的外表面与侧压边形成一第一间隙,第三套筒设有一固定通孔；枢轴组件,位于通孔之中,包括一扭簧、一活动连接单元和一固定连接单元,扭簧的两端分别卡接于活动连接单元和固定连接单元。(The invention provides a hinge capable of adjusting and positioning, which comprises: the first page plate comprises a first base plate, a first sleeve and a second sleeve which are integrally formed, the edge of the first base plate, which is positioned between the first sleeve and the second sleeve, in the thickness direction of the first base plate is a side pressing edge, and the first sleeve is provided with a sliding groove; the second page plate comprises a second base plate and a third sleeve which are integrally formed, the third sleeve is positioned between the first sleeve and the second sleeve, hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate through the hollow spaces to form a through hole, a first gap is formed between the outer surface of the third sleeve and the side pressure edge, and the third sleeve is provided with a fixing through hole; the pivot assembly is positioned in the through hole and comprises a torsion spring, a movable connecting unit and a fixed connecting unit, and two ends of the torsion spring are respectively clamped in the movable connecting unit and the fixed connecting unit.)

1. The utility model provides an adjustable location's hinge which characterized in that includes:

the first page plate comprises a first base plate, a first sleeve and a second sleeve which are integrally formed, the first sleeve and the second sleeve are positioned on the same side of the first base plate, the first sleeve is connected to the upper part of the first base plate, the second sleeve is connected to the lower part of the first base plate, the edge of the first base plate between the first sleeve and the second sleeve in the thickness direction is a side pressing edge, and the first sleeve is provided with a sliding groove;

the second sheet comprises a second base plate and a third sleeve which are integrally formed, the third sleeve is positioned between the first sleeve and the second sleeve, hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate through the hollow spaces to form a through hole, the third sleeve is provided with a fixing through hole, and a first gap is formed between the side pressure edge and the outer surface of the opposite third sleeve;

the pivot subassembly is located among the through-hole, including a torsional spring, a swing joint unit and a fixed connection unit, the both ends difference joint in swing joint unit and fixed connection unit of torsional spring, wherein:

the movable connecting unit is provided with a bayonet lock which is adjustably arranged in the sliding groove in a penetrating way; when the first leaf plate and the second leaf plate are opened around the central axis of the through hole, the clamping pin is abutted by the edge of the sliding groove;

the fixed connecting unit is provided with a positioning mechanism which is exposed on the outer surface of the third sleeve through the fixed through hole and the exposed height is larger than the first gap; the positioning mechanism is provided with a propping spring, and when the first sheet plate and the second sheet plate are opened or closed around the central axis of the through hole under the action of external force, the propping spring is compressed inwards to prop the positioning mechanism to the side pressing edge for enabling the positioning mechanism to pass through the first gap.

2. The adjustable positioning hinge as claimed in claim 1, wherein said movable connection unit further comprises a first rotating shaft; one end of the torsion spring is clamped on the first rotating shaft, the first rotating shaft is provided with a plurality of positioning holes at different positions for the bayonet lock to be selectively inserted, and the positioning holes can rotate relative to the sliding groove.

3. The adjustable hinge as claimed in claim 2, wherein said fixed connection unit comprises a second rotation shaft; the second rotating shaft is radially provided with a containing hole for arranging the positioning mechanism; the positioning mechanism is lengthwise and provided with a cylinder body for placing the propping spring and a positioning ball which is clamped in the cylinder body and part of which can be exposed out of the port of the cylinder body.

4. The adjustable hinge of claim 2 wherein the locking pin is located in different locating holes as viewed in a cross-sectional projection perpendicular to the central axis, and forms an angle with the locating mechanism in the range of 0 to 120 degrees.

5. The adjustable positioning hinge as claimed in claim 2, wherein the first rotating shaft has a cylindrical main body and a first clamping part, the cylindrical main body is radially and symmetrically provided with an even number of positioning holes equal to or larger than six, and the clamping pins are arranged through a pair of symmetrical positioning holes; one end of the torsion spring is clamped and connected with the first clamping part.

6. The adjustable hinge as claimed in claim 3, wherein the fixed connection unit further comprises a buffer connection member disposed inside the third sleeve, the buffer connection member is fixedly connected to the second shaft, the second shaft is made of metal, the buffer connection member comprises a plastic body and a metal core fixedly connected to the second shaft, and the metal core is partially embedded in the plastic body.

7. The adjustable hinge as claimed in claim 3, wherein the plastic body has a cylindrical shape and a rib is provided on the outer surface thereof, the rib corresponding to the axial slit of the second sleeve.

8. The adjustable hinge as claimed in claim 1, wherein the locking pin comprises an elongated body and a head integrally formed with the elongated body, the head having a size larger than the width of the sliding groove to block the head from entering the positioning hole and the sliding groove.

9. The utility model provides an adjustable location's hinge which characterized in that includes:

the first page plate comprises a first base plate, a first sleeve and a second sleeve which are integrally formed, the first sleeve and the second sleeve are positioned on the same side of the first base plate, the first sleeve is connected to the upper part of the first base plate, the second sleeve is connected to the lower part of the first base plate, the edge of the first base plate between the first sleeve and the second sleeve in the thickness direction is a side pressing edge, and the first sleeve is provided with a sliding groove;

the second page plate comprises a second base plate and a third sleeve which are integrally formed, the third sleeve is positioned between the first sleeve and the second sleeve, hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate through the hollow spaces to form a through hole, a first gap is formed between the outer surface of the third sleeve and the side pressure edge, and the third sleeve is provided with a fixing through hole;

the pivot subassembly is located among the through-hole, including a torsional spring, a swing joint unit and a fixed connection unit, the both ends difference joint in swing joint unit and fixed connection unit of torsional spring, wherein:

the movable connecting unit is provided with a plurality of positioning holes and a clamping pin, the positioning holes can rotate relative to the sliding groove, and the clamping pin penetrates through the sliding groove and the positioning holes; when the first leaf plate and the second leaf plate are opened around the central axis of the through hole, the clamping pin is abutted by the edge of the sliding groove;

the fixed connecting unit is provided with a positioning mechanism which is exposed on the outer surface of the third sleeve through the fixed through hole and the exposed height is larger than the first gap; the positioning mechanism is provided with a propping spring, and when the first sheet plate and the second sheet plate are opened or closed around the central axis of the through hole under the action of external force, the propping spring is compressed inwards to prop the positioning mechanism to the side pressing edge for enabling the positioning mechanism to pass through the first gap.

10. The adjustable hinge as claimed in claim 1 or 9, wherein the opening angle of the sliding groove is 135 ° or less as viewed in a projection of a cross section perpendicular to the central axis.

Technical Field

The invention relates to a hinge capable of adjusting and positioning.

Background

The hinge is widely used for opening doors and windows. Common hinge carries out the free rotation for two pages of boards around the axis spare, closes door and window at will in order to take precautions against the gust, and perhaps strong wind makes door and window and wall body take place strong striking and damage, installs the door-inhale on ground or on the wall usually for after opening the door, the door-inhale can be fixed in the open mode with the door.

Therefore, the hinge and the door stopper are required to be installed, the two products are required to be combined for use, and the use is troublesome.

Disclosure of Invention

The invention provides a hinge capable of adjusting positioning, which not only can automatically position a door and window after the door and window are opened to a certain angle, but also can adjust the positioning angle to open the door and window to a preset angle, and is convenient to use.

The invention provides a hinge capable of adjusting and positioning, which comprises: the first page plate comprises a first base plate, a first sleeve and a second sleeve which are integrally formed, the first sleeve and the second sleeve are positioned on the same side of the first base plate, the first sleeve is connected to the upper part of the first base plate, the second sleeve is connected to the lower part of the first base plate, the edge of the first base plate between the first sleeve and the second sleeve in the thickness direction is a side pressing edge, and the first sleeve is provided with a sliding groove; the second sheet comprises a second base plate and a third sleeve which are integrally formed, the third sleeve is positioned between the first sleeve and the second sleeve, hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate through the hollow spaces to form a through hole, the third sleeve is provided with a fixing through hole, and a first gap is formed between the side pressure edge and the outer surface of the opposite third sleeve;

the pivot subassembly is located among the through-hole, including a torsional spring, a swing joint unit and a fixed connection unit, the both ends difference joint in swing joint unit and fixed connection unit of torsional spring, wherein: the movable connecting unit is provided with a bayonet lock which is adjustably arranged in the sliding groove in a penetrating way; when the first leaf plate and the second leaf plate are opened around the central axis of the through hole, the clamping pin is abutted by the edge of the sliding groove; the fixed connecting unit is provided with a positioning mechanism which is exposed on the outer surface of the third sleeve through the fixed through hole and the exposed height is larger than the first gap; the positioning mechanism is provided with a propping spring, and when the first sheet plate and the second sheet plate are opened or closed around the central axis of the through hole under the action of external force, the propping spring is compressed inwards to prop the positioning mechanism to the side pressing edge for enabling the positioning mechanism to pass through the first gap.

Furthermore, the movable connecting unit also comprises a first rotating shaft; one end of the torsion spring is clamped on the first rotating shaft, the first rotating shaft is provided with a plurality of positioning holes at different positions for the bayonet lock to be selectively inserted, and the positioning holes can rotate relative to the sliding groove.

Further, the fixed connection unit comprises a second rotating shaft; the second rotating shaft is radially provided with a containing hole for arranging the positioning mechanism; the positioning mechanism is lengthwise and provided with a cylinder body for placing the propping spring and a positioning ball which is clamped in the cylinder body and part of which can be exposed out of the port of the cylinder body.

Furthermore, viewed in a projection of a cross section perpendicular to the central axis, the locking pins are located in different positioning holes, and can form an included angle in a range of 0 to 120 degrees with the positioning mechanism.

Further, the first rotating shaft is provided with a cylinder main body and a first clamping part, even number of positioning holes which are equal to or larger than six are radially and symmetrically arranged on the cylinder main body, and the clamping pins penetrate through a pair of symmetrical positioning holes; one end of the torsion spring is clamped and connected with the first clamping part.

Furthermore, the fixed connection unit further comprises a buffer connection piece, the buffer connection piece is located inside the third sleeve, the buffer connection piece is fixedly connected with the second rotating shaft, the second rotating shaft is made of metal, the buffer connection piece comprises a plastic main body and a metal core fixedly connected with the second rotating shaft, and the metal core is partially embedded in the plastic main body.

Further, the plastic main part is the cylinder shape, is provided with a fin at the surface outward, and the fin is corresponding to telescopic axial gap of second.

Further, the bayonet lock comprises an elongated body and a head which are integrally formed, and the size of the head is larger than the width of the sliding groove so as to prevent the head from entering the positioning hole and the sliding groove.

The invention also provides a hinge capable of adjusting and positioning, which comprises: the first page plate comprises a first base plate, a first sleeve and a second sleeve which are integrally formed, the first sleeve and the second sleeve are positioned on the same side of the first base plate, the first sleeve is connected to the upper part of the first base plate, the second sleeve is connected to the lower part of the first base plate, the edge of the first base plate between the first sleeve and the second sleeve in the thickness direction is a side pressing edge, and the first sleeve is provided with a sliding groove; the second sheet comprises a second base plate and a third sleeve which are integrally formed, the third sleeve is positioned between the first sleeve and the second sleeve, hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate through the hollow spaces to form a through hole, the third sleeve is provided with a fixing through hole, and a first gap is formed between the side pressure edge and the outer surface of the opposite third sleeve;

the pivot subassembly is located among the through-hole, including a torsional spring, a swing joint unit and a fixed connection unit, the both ends difference joint in swing joint unit and fixed connection unit of torsional spring, wherein: the movable connecting unit is provided with a plurality of positioning holes and a clamping pin, the positioning holes can rotate relative to the sliding groove, and the clamping pin penetrates through the sliding groove and the positioning holes; when the first leaf plate and the second leaf plate are opened around the central axis of the through hole, the clamping pin is abutted by the edge of the sliding groove; the fixed connecting unit is provided with a positioning mechanism which is exposed on the outer surface of the third sleeve through the fixed through hole and the exposed height is larger than the first gap; the positioning mechanism is provided with a propping spring, and when the first sheet plate and the second sheet plate are opened or closed around the central axis of the through hole under the action of external force, the propping spring is compressed inwards to prop the positioning mechanism to the side pressing edge for enabling the positioning mechanism to pass through the first gap.

Furthermore, the opening angle of the sliding groove is equal to or less than 135 degrees when viewed in projection of a cross section perpendicular to the central axis.

According to the hinge with the adjustable positioning, the movable connecting unit can rotate relative to the sliding groove of the first sleeve, the rotation degree of the movable connecting unit determines the restoring force of the torsion spring, namely the clamping pin can be adjusted in the sliding groove, so that the clamping pin can position the initial state of the torsion spring, and the preset opening angle of the hinge can be adjusted; on the other hand, the positioning mechanism exposed outside the third sleeve is under the action of the side pressing edges due to the fact that the abutting springs stretch and retract, when the first leaf plate and the second leaf plate are opened by external force, the torsion springs are twisted, after the opening degree is larger than the preset angle, the torsion springs generate restoring force, the first leaf plate and the second leaf plate are closed by the restoring force of the torsion springs, but the two ends of the torsion springs are respectively restrained by the clamping pins and the positioning mechanism, and therefore the first leaf plate and the second leaf plate are positioned at the preset angle. According to the hinge capable of adjusting the positioning, the preset angle of positioning and opening can be adjusted by one product, and the hinge is more convenient to operate than the condition that two products are matched (a common hinge and a door stopper).

Drawings

FIG. 1 is a schematic view of an adjustably positionable hinge of the present invention in a 180 degree open position;

FIG. 2 is a schematic view of the adjustably positionable hinge of FIG. 1 in a fully closed position;

FIG. 3 is an assembled view of the adjustably positionable hinge of FIG. 1;

FIG. 4 is a cross-sectional view of the adjustably positionable hinge shown in FIG. 2;

FIG. 5 is a cross-sectional view of the positioning mechanism shown in FIG. 2;

FIG. 6 is an assembled view of the first shaft shown in FIG. 2;

FIG. 7 is an assembled view of the second shaft and the damping connection shown in FIG. 2;

FIG. 8 is a cross-sectional view of the adjustably positionable hinge of FIG. 2 in a fully closed position;

FIG. 9 is a cross-sectional view of the adjustable positioning hinge of FIG. 1 shown opened to a predetermined angle;

FIG. 10 is a schematic projection of the positioning mechanism and bayonet of FIG. 3 in cross-section perpendicular to the central axis.

The reference numbers illustrate:

10 first sheet 11 first base 12 first sleeve

13 second sleeve 14 mounting hole 15 side pressure limit

16 sliding groove

20 second leaf 21, second base 22 and third sleeve

23 fixing the through hole 24 first gap 130 axial gap

30 torsion spring 40 end cap

50 bayonet 51, elongate body 52 head

60 first rotating shaft 61 cylindrical body 62 positioning hole

63 the positioning mechanism 71 of the first catch 70 abuts against the spring

72 cylinder 73 positioning ball

80 second rotating shaft 81 accommodating hole 82 second clamping part

83 hexagonal hole 90 buffer connector 91 plastic body

92 convex rib 93 metal core 95 gasket

Detailed Description

An embodiment of the adjustable hinge according to the present invention is described in detail below with reference to the accompanying drawings. Reference will be made to the following description with reference to the directions indicated in the corresponding drawings.

As shown in fig. 1 to 2, the adjustable hinge of the present invention comprises a first leaf 10, a second leaf 20 and a pivot assembly. The first leaf 10 and the second leaf 20 rotate about the central axis of the pivot assembly.

As shown in fig. 3 and 4, the first sheet 10 includes a first base plate 11, a first sleeve 12, and a second sleeve 13 which are integrally formed. The first sleeve 12 and the second sleeve 13 are located on the same side of the first base plate 11. The first sleeve 12 is connected to an upper portion of the first base plate 11, and the second sleeve 13 is connected to a lower portion of the first base plate 11. The edge of the first substrate 11 in the thickness direction between the first sleeve 12 and the second sleeve 13 is defined as a side pressing edge 15. The first sleeve 12 is provided with a sliding groove 16, and the opening angle of the sliding groove 16 is equal to or less than 135 degrees when viewed in a projection of a cross section perpendicular to the central axis. The first substrate 11 is provided with a plurality of mounting holes 14 for screws or pins to pass through to fix the first substrate to a wall or a door panel.

And a second sheet 20 comprising a second base plate 21 and a third sleeve 22 integrally formed, the third sleeve 22 being located between the first sleeve 12 and the second sleeve 13. The diameters of the hollow spaces of the first sleeve 12, the second sleeve 13 and the third sleeve 22 are the same, and the three parts penetrate through the hollow spaces to form a through hole and a same central axis, and the through hole is used for accommodating a pivot assembly. The side margins 15 form first gaps 24 with the opposing third sleeve outer surface. The lower portion of the third sleeve 22 is provided with a fixing through-hole 23. The second substrate 21 is also provided with a plurality of mounting holes for screws to pass through to fix the second substrate to a wall or a door panel.

The pivot assembly includes a torsion spring 30, a movable connecting unit, a fixed connecting unit and two end covers 40, and two ends of the torsion spring 30 are respectively fastened to the movable connecting unit and the fixed connecting unit. The articulation unit is rotatable with respect to the third sleeve 22; and the movable connection unit is also rotatable relative to the first sleeve 12; the fixed connection unit is non-rotatable with respect to the third sleeve 22.

As shown in fig. 3 and 6, the movable coupling unit includes a first rotating shaft 60 and a latch 50. The first rotating shaft 60 is made of metal and is provided with a cylindrical main body 61 and a first clamping part 63; the cylinder main body 61 has an inner cavity, and six positioning holes 62 are radially and symmetrically arranged on the cylinder main body 61. The top end of the first shaft 60 is sealed within the first sleeve 12 by an end cap 40. As shown in fig. 4, the first shaft 60 is located at an upper portion within the first sleeve 12 and at a lower portion within the third sleeve 22.

It should be understood that in other embodiments, the cylinder body may be symmetrically provided with eight positioning holes, etc. in the radial direction, and the positioning holes may be arranged as required.

As shown in fig. 3 and 5, the locking pin 50 includes an elongated body 51 and a head 52 integrally formed, and the head 52 has a size larger than the width of the sliding groove 16 to block the head 52 from entering the positioning hole 62 and the sliding groove 16. The elongated body 51 of the bayonet 50 can be inserted into a symmetrical pair of positioning holes 62. It should be understood that the gap between the side of the second base plate 21 corresponding to the sliding slot 16 and the outer surface of the first sleeve should be wide enough so that the movement of the head 52 of the latch 50 is not hindered by the second base plate.

As shown in fig. 3, both ends of the torsion spring 30 have a straight end, and the straight end of the torsion spring 30 is embedded in the first retaining portion 63.

As shown in fig. 3, the fixed connection unit includes a positioning mechanism 70, a second rotating shaft 80 and a buffer connector 90, the second rotating shaft 80 and the buffer connector 90 are fixedly connected for transmission, and the positioning mechanism 70 is fixedly connected with the second rotating shaft 80.

As shown in fig. 3 and 7, the second rotating shaft 80 is made of a metal material, and is provided with a receiving hole 81 in a radial direction, and the receiving hole 81 is penetrated through the fixing through hole 23 of the third sleeve 22, so that the elongated positioning mechanism 70 is mounted in the receiving hole 81 through the fixing through hole 23. The second rotating shaft 80 has a second catch 82; the first end of the torsion spring 30 is fitted into the second retaining portion 82. The second shaft 80 is further provided with a hexagonal hole 83. As shown in fig. 4, the second shaft 80 is partially disposed within the third sleeve 22 and partially disposed within the second sleeve 13.

As shown in fig. 4 and 5, the positioning mechanism 70 includes a cylinder 72, an urging spring 71, and a positioning ball 73; the ends of the cylinder 72 are inwardly tapered to capture the hold-down spring 71 and the retaining ball 73 within the cylinder 72. The abutting spring 71 abuts against the positioning ball 73 without an external force, so that the positioning ball 73 is partially exposed to the port of the cylinder 72. The barrel part is exposed outside the third sleeve, so that the positioning ball 73 is exposed on the outer surface of the third sleeve under the condition of no external force; the positioning mechanism 70 is exposed to the outer surface of the third sleeve at a greater height than the first gap 24.

As shown in fig. 3 and 7, the buffer connecting member 90 includes a cylindrical plastic body 91, and an elongated metal core 93 partially embedded in the plastic body 91. The metal core 93 has a hexagonal cross section. After passing through the plastic washer 95, the metal core 93 is mounted in the hexagonal hole 83 of the second shaft 80, so that the buffer connecting member 90 is fixedly connected to the second shaft 80 for transmission. The outer surface of the plastic body 81 is provided with a rib 92, and the rib 92 corresponds to the axial slit 130 formed by bending the second sleeve 13. The bottom end of the plastic body 81 is sealed within the second sleeve 13 by the end cap 40. As shown in FIG. 4, the cushion link 90 is located within the second sleeve 13.

In the first aspect of the hinge with adjustable positioning according to the present invention, when the first leaf 10 and the second leaf 20 are completely closed, the pin is not inserted into the positioning hole, and the first rotating shaft is rotated in the first sleeve by using a tool (for example, a metal strip is used to dig into a positioning hole, and the first rotating shaft is rotated in the first sleeve by applying force), so that the torsion spring generates an initial torsion force; then, the bayonet lock is inserted into a suitable positioning hole, and at this time, after the bayonet lock 50 is inserted into the positioning hole 62 as viewed in a projection of a cross section perpendicular to the central axis, the positioning hole 62 is positioned such that an angle α between the bayonet lock 50 and the positioning mechanism 70 is 0 degree (which may be within 5 degrees due to mounting accuracy, tolerance of parts, and the like), as shown in fig. 8 and 10; the working principle is as follows:

the first stage is as follows: and (4) opening process. At this time, when the first sheet 10 and the second sheet 20 are opened, an external force is required to overcome the restoring force of the torsion spring 30, and during the opening process, the latch 50 is abutted by the edge of the sliding groove 16 (the edge refers to the inner wall of the sliding groove 16 close to the positioning mechanism when viewed in a projection of a cross section perpendicular to the central axis); when the external force reaches a certain degree, the side pressing edge 15 of the first sheet 10 enables the abutting spring 71 to be compressed inwards, the positioning ball 73 contracts inwards, and the side pressing edge 15 can scrape the positioning ball 73.

And a second stage: and (5) positioning state. When the side pressing edge 15 has scraped the positioning ball, the opening angle of the first sheet 10 and the second sheet 20 is greater than the preset angle (about 90 degrees in this embodiment, within 5 degrees of error), the external force is removed, the first sheet 10 and the second sheet 20 are folded by the restoring force of the torsion spring 30, but the restoring force of the torsion spring 30 is not enough to force the side pressing edge 15 to push the spring 71 to compress inwards due to the absence of the external force, so that the side pressing edge 15 cannot scrape the positioning ball 73, and therefore, the first sheet 10 is blocked by the protruding positioning ball 73. In addition, the click 50 is abutted by the edge of the slide groove 16; in this way, the two ends of the torsion spring are restrained, so that the first leaf 10 and the second leaf 20 are kept static after being folded to a preset angle, as shown in fig. 9.

And a third stage: and (5) closing process. Applying external force, so that when the external force reaches a certain degree, the side pressing edge 15 of the first sheet 10 enables the abutting spring 71 to be compressed inwards, the positioning ball 73 contracts inwards, and the side pressing edge 15 scrapes the positioning ball 73; after the side pressure edge 15 has scraped the positioning ball 73, the first leaf 10 and the second leaf 20 can be folded even without external force due to the relatively large restoring force of the torsion spring; but the restoring force of the torsion spring is gradually reduced and is not enough to overcome the friction force inside the pivot assembly, and a small amount of external force is needed to overcome the friction force inside the pivot assembly to close the first leaf 10 and the second leaf 20.

In the second case, the hinge with adjustable positioning according to the present invention, when the first leaf 10 and the second leaf 20 are completely closed, and viewed in a projection of a cross section perpendicular to the central axis, after the pin 50 is inserted into the positioning hole 62, the positioning hole 62 is located such that the pin 50 is at an angle of 60 degrees with respect to the positioning mechanism 70 (there may be an error of 5 degrees due to installation accuracy, tolerance of parts, etc.), as shown in fig. 10, the operation principle is as follows:

the first stage is as follows: and (4) opening process. At this time, when the first sheet 10 and the second sheet 20 are opened, an external force is required to overcome the restoring force of the torsion spring, when the external force reaches a certain degree, the side pressing edge 15 of the first sheet 10 makes the abutting spring 71 compress inwards, and the positioning ball 73 contracts inwards, so that the side pressing edge 15 can scrape the positioning ball 73.

And a second stage: and (5) positioning state. When the side pressing edge 15 has scraped the positioning ball, the opening angle (for example, 180 degrees) of the first leaf 10 and the second leaf 20 is greater than the preset angle (in this embodiment, the preset angle is about 120 degrees, and the error is within 5 degrees), the external force is removed, due to the restoring force of the torsion spring, the first leaf 10 and the second leaf 20 are naturally folded, but at this time, the constraint on the two ends of the torsion spring is smaller than the constraint when the included angle between the detent and the positioning mechanism is 0 degrees under the first condition, the first leaf 10 and the second leaf 20 are folded to a certain degree, the first leaf 10 does not contact with the positioning ball 73, the restoring of the torsion spring is completely completed, and the first leaf 10 and the second leaf 20 are folded without force and remain static.

And a third stage: and (5) closing process. Applying external force, so that when the external force reaches a certain degree, the side pressing edge 15 of the first sheet 10 enables the abutting spring 71 to be compressed inwards, and the positioning ball 73 contracts inwards, so that the positioning ball 73 abuts against the side pressing edge 15; when the lateral pressing edge 15 has scraped the positioning ball 73, the first leaf 10 and the second leaf 20 cannot be folded even if the external force is removed due to insufficient restoring force of the torsion spring or the completion of the restoration, and the external force needs to be continuously applied to fold the first leaf 10 and the second leaf 20.

In conclusion, the positioning hole can be adjusted relative to the sliding groove, so that the torsion spring generates initial restoring force with different degrees; the bayonet lock is inserted in the locating hole of different positions for the torsional spring both ends receive the restraint of different degree, thereby have decided the size of the restoring force of torsional spring. If the detent is not inserted into any of the positioning holes, the rotation of the first rotating shaft is not restricted and the torsion spring is deactivated.

The hinge with adjustable positioning has the following advantages:

(1) according to the hinge capable of adjusting and positioning, when the first hinge plate 10 and the second hinge plate 20 are completely closed, the bayonet pin is not inserted into the positioning hole, the first rotating shaft is rotated in the first sleeve by means of a tool (for example, a metal strip is used for poking into a certain positioning hole, and the first rotating shaft is rotated in the first sleeve by force), so that the torsion spring generates initial torsion, and an operator can adjust the hinge according to actual conditions;

(2) the bayonet lock 50 is adjustably arranged in the positioning hole 62 in a penetrating way, so that the two ends of the torsion spring 30 are restrained in different degrees, the restoring force of the torsion spring is determined, the bayonet lock is convenient to insert and pull, and the first page plate and the second page plate are conveniently adjusted and positioned to a preset angle; it should be understood that if the positioning holes are more arranged, the adjustable angle of the bayonet lock is more subtle, and the precision of the adjustment to the preset angle is more accurate;

(3) the upper part of the first rotating shaft 60 made of metal is positioned in the first sleeve 12, and the lower part is positioned in the third sleeve; the upper part of the second rotating shaft 80 made of metal is positioned in the third sleeve 22, and the lower part is positioned in the second sleeve 13; therefore, the connecting parts of the first sleeve 12, the second sleeve 13 and the third sleeve 22 which are made of metal materials are all metal parts, so that the strength is similar, the connection is firm, and the parts are not easy to damage;

(4) the angle of the hinge to be opened is usually within 180 degrees, and the opening angle of the sliding groove 16 is equal to or less than 135 degrees when viewed in the projection of the cross section perpendicular to the central axis; in cooperation with the opening angle of the sliding groove, when viewed in projection of a cross section perpendicular to the central axis, the bayonet pins are positioned in different positioning holes (according to the situation that six positioning holes are arranged), and can approximately form an included angle ranging from 0 degree to 120 degrees with the positioning mechanism, so that the preset angle of common hinge positioning can be basically met;

(5) the buffer connecting piece 90 with the plastic main body is adopted, the plastic material is easier to process than the metal material, and the plastic main body is matched with damping oil for use, so that the damage caused by the strong bending of the torsion spring is reduced, and the service life of the torsion spring is prolonged;

(6) the outer surface of the plastic body 91 is provided with a rib 92, the rib 92 corresponds to an axial gap 130 formed by bending the second sleeve 13, and the rib 92 can slightly rotate near the axial gap 130; away from the axial gap, the ribs cannot be accommodated; in this manner, the rotation of the cushion link 90 is maintained within a fine range so that the pivot assembly can be adapted when installed;

(7) the first rotating shaft can rotate relative to the first sleeve, and the positioning hole of the first rotating shaft can be adjusted to a proper position by means of a tool, so that the positioning hole is not shielded by the inner wall of the first sleeve, the clamping pin can be easily inserted into the positioning hole through the sliding groove, and the operation is facilitated.

It should be noted that the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.