Adjustable positioning hinge

Abstract

The present invention provides an adjustable positioning hinge, comprising: a first page plate, including a first base plate, a first sleeve and a second sleeve integrally formed. The edge in the thickness direction of the first base plate located between the first sleeve and the second sleeve is a side pressing edge, and the first sleeve is provided with a sliding groove; a second page plate, including a second base plate and a third sleeve integrally formed. The third sleeve is located between the first sleeve and the second sleeve. The hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate through to form a through hole. A first gap is formed between the outer surface of the third sleeve and the side pressing edge, and the third sleeve is provided with a fixed through hole; a pivot assembly, located in the through hole, including a torsion spring, a movable connection unit and a fixed connection unit. The two ends of the torsion spring are respectively clamped to the movable connection unit and the fixed connection unit.

Description

Technical Field

[0001] The present invention relates to a hinge with adjustable positioning. Background Art

[0002] Hinges are widely used for the opening of doors and windows. For common hinges, two page plates rotate freely around a central shaft member. In order to prevent gusts from closing the doors and windows randomly, or strong winds from causing strong impacts between the doors and windows and the wall, door stoppers are usually installed on the ground or on the wall so that after the door is opened, the door stopper can fix the door in the open state.

[0003] In this way, not only hinges need to be installed, but also door stoppers need to be installed, and the combined use of two products is required, which is rather troublesome to use. Summary of the Invention

[0004] The present invention provides a hinge with adjustable positioning, which can not only automatically position the doors and windows after being opened to a certain angle, but also adjust the positioning angle so that the doors and windows are opened to a preset angle, and is convenient to use.

[0005] The present invention provides a hinge with adjustable positioning, including: a first page plate, including an integrally formed first base plate, a first sleeve and a second sleeve. The first sleeve and the second sleeve are located on the same side of the first base plate, and the first sleeve is connected to the upper part of the first base plate, and the second sleeve is connected to the lower part of the first base plate. The edge in the thickness direction of the first base plate between the first sleeve and the second sleeve is a side pressing edge, and the first sleeve is provided with a sliding groove; a second page plate, including an integrally formed second base plate and a third sleeve. The third sleeve is located between the first sleeve and the second sleeve. The hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate to form a through hole. The third sleeve is provided with a fixed through hole, and a first gap is formed between the side pressing edge and the outer surface of the opposite third sleeve;

[0006] A pivot assembly, located in the through hole, includes a torsion spring, a movable connection unit and a fixed connection unit. The two ends of the torsion spring are respectively clamped to the movable connection unit and the fixed connection unit. Among them: the movable connection unit has a pin, and the pin is adjustably inserted into the sliding groove; when the first page plate and the second page plate are opened around the central axis of the through hole, the pin is abutted by the edge of the sliding groove; the fixed connection unit is provided with a positioning mechanism, and the positioning mechanism is exposed on the outer surface of the third sleeve through the fixed through hole and the exposed height is greater than the first gap; the positioning mechanism has a top spring. When the first page plate and the second page plate are opened or closed around the central axis of the through hole by an external force, the top spring is compressed inward to abut the positioning mechanism against the side pressing edge for passing the positioning mechanism through the first gap.

[0007] Further, the movable connection unit further includes a first rotating shaft; one end of the torsion spring is clamped to the first rotating shaft, and the first rotating shaft is provided with a plurality of positioning holes at different positions for the pin to selectively insert, and the positioning holes are rotatable relative to the sliding groove.

[0008] Further, the fixed connection unit includes a second rotating shaft; a receiving hole is provided radially on the second rotating shaft to accommodate a positioning mechanism; the positioning mechanism is integrally elongate, having a cylinder body for accommodating a pressing spring, and a positioning ball that is stuck inside the cylinder body and partially exposed at the port of the cylinder body.

[0009] Further, when viewed in the projection of the cross-section perpendicular to the central axis, the latch pins are located in different positioning holes and can form an angle in the range of 0 to 120 degrees with the positioning mechanism.

[0010] Further, the first rotating shaft has a cylindrical main body and a first clamping portion. The cylindrical main body is radially symmetrically provided with an even number of positioning holes equal to or greater than six. The latch pins are inserted through a pair of symmetric positioning holes; one end of the torsion spring is clamped to the first clamping portion.

[0011] Further, the fixed connection unit further includes a buffer connecting member. The buffer connecting member is located inside the third sleeve. The buffer connecting member is fixedly connected to the second rotating shaft. The second rotating shaft is made of metal. The buffer connecting member includes a plastic main body and a metal core fixedly connected to the second rotating shaft. The metal core is partially embedded in the plastic main body.

[0012] Further, the plastic main body is in a cylindrical shape, and a convex rib is provided on the outer surface. The convex rib corresponds to the axial gap of the second sleeve.

[0013] Further, the latch pin includes an integrally formed slender body and a head. The size of the head is larger than the width of the sliding groove to prevent the head from entering the positioning hole and the sliding groove.

[0014] The present invention also provides an adjustable positioning hinge, including: a first page plate, including an integrally formed first base plate, a first sleeve, and a second sleeve. The first sleeve and the second sleeve are located on the same side of the first base plate, and the first sleeve is connected to the upper part of the first base plate, and the second sleeve is connected to the lower part of the first base plate. The edge in the thickness direction of the first base plate between the first sleeve and the second sleeve is a side pressing edge, and the first sleeve is provided with a sliding groove; a second page plate, including an integrally formed second base plate and a third sleeve. The third sleeve is located between the first sleeve and the second sleeve. The hollow spaces of the first sleeve, the second sleeve, and the third sleeve penetrate to form a through hole. The third sleeve is provided with a fixed through hole, and the side pressing edge forms a first gap with the outer surface of the opposite third sleeve;

[0015] The pivot assembly is located in the through hole and includes a torsion spring, a movable connection unit, and a fixed connection unit. The two ends of the torsion spring are respectively clamped to the movable connection unit and the fixed connection unit. Among them: The movable connection unit has a plurality of positioning holes and a pin. The positioning holes can rotate relative to the sliding groove, and the pin passes through the sliding groove and the positioning holes; when the first page board and the second page board are opened around the central axis of the through hole, the pin is abutted by the edge of the sliding groove; The fixed connection unit is provided with a positioning mechanism. The positioning mechanism is exposed on the outer surface of the third sleeve through the fixed through hole and the exposed height is greater than the first gap; the positioning mechanism has a top spring. When the first page board and the second page board are opened or closed around the central axis of the through hole by an external force, the top spring is compressed inward to press the side pressing edge of the positioning mechanism, so as to pass the positioning mechanism through the first gap.

[0016] Further, when viewed in the projection of the cross-section perpendicular to the central axis, the opening angle of the sliding groove is equal to or less than 135 degrees.

[0017] For the adjustable-position hinge of the present invention, the movable connection unit can rotate relative to the sliding groove of the first sleeve, and the degree of its rotation determines the magnitude of the restoring force of the torsion spring, that is, the pin is adjustable in the sliding groove, so that the pin can position the initial state of the torsion spring. Therefore, the preset opening angle of the hinge can be adjusted; on the other hand, for the positioning mechanism exposed outside the third sleeve, due to the expansion and contraction of the top spring being affected by the side pressing edge, when the first page board and the second page board are opened by an external force, the torsion spring is distorted. After the opening degree is greater than the preset angle, the torsion spring generates a restoring force, and the first page board and the second page board are closed by relying on the restoring force of the torsion spring. However, the two ends of the torsion spring are respectively restricted by the pin and the positioning mechanism, resulting in the first page board and the second page board being positioned at the preset angle. For the adjustable-position hinge of the present invention, one product can achieve the adjustment of the positioning and the preset opening angle, which is more convenient to operate than the situation of using two products in cooperation (ordinary hinge and door stopper). Description of the Drawings

[0018] Figure 1 is a schematic diagram of the adjustable-position hinge of the present invention in the 180-degree open state;

[0019] Figure 2 is Figure 1 a schematic diagram of the adjustable-position hinge shown in the fully closed state;

[0020] Figure 3 is Figure 1 a schematic assembly diagram of the adjustable-position hinge shown;

[0021] Figure 4 is Figure 2 a cross-sectional view of the adjustable-position hinge shown;

[0022] Figure 5 isFigure 2 The positioning mechanism shown in a sectional view;

[0023] Figure 6 is Figure 2 An assembly schematic diagram of the first rotating shaft shown;

[0024] Figure 7 is Figure 2 An assembly schematic diagram of the second rotating shaft and the buffer connecting member shown;

[0025] Figure 8 is Figure 2 A sectional view of the adjustable positioning hinge shown in a fully closed state;

[0026] Figure 9 is Figure 1 A sectional view of the adjustable positioning hinge shown when it is opened and positioned at a preset angle;

[0027] Figure 10 is Figure 3 A projection schematic diagram of the positioning mechanism and the retaining pin in a cross-section perpendicular to the central axis.

[0028] Explanation of the reference numerals in the drawings:

[0029] 10 First page plate 11 First base plate 12 First sleeve

[0030] 13 Second sleeve 14 Mounting hole 15 Side pressing edge

[0031] 16 Sliding groove

[0032] 20 Second page plate 21 Second base plate 22 Third sleeve

[0033] 23 Fixed through hole 24 First gap 130 Axial gap

[0034] 30 Torsion spring 40 End cap

[0035] 50 Retaining pin 51 Elongated body 52 Head

[0036] 60 First rotating shaft 61 Cylindrical body 62 Positioning hole

[0037] 63 First clamping portion 70 Positioning mechanism 71 Thrust spring

[0038] 72 Cylinder 73 Positioning ball

[0039] 80 Second rotating shaft 81 Receiving hole 82 Second clamping portion

[0040] 83 Hexagonal hole 90 Buffer connecting member 91 Plastic body

[0041] 92 Rib 93 Metal core 95 Gasket Detailed Embodiment

[0042] The following will, with reference to the accompanying drawings, elaborate on an embodiment of the adjustable positioning hinge of the present invention. Regarding the directions involved in the following description, the directions shown in the corresponding drawings are taken as reference.

[0043] As Figures 1 to 2 shown, an adjustable positioning hinge of the present invention includes a first page plate 10, a second page plate 20, and a pivot assembly. The first page plate 10 and the second page plate 20 rotate around the central axis of the pivot assembly.

[0044] As Figure 3 and Figure 4 shown, the first page plate 10 includes an integrally formed first base plate 11, a first sleeve 12, and a second sleeve 13. 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 the upper part of the first base plate 11, and the second sleeve 13 is connected to the lower part of the first base plate 11. The edge in the thickness direction of the first base plate 11 between the first sleeve 12 and the second sleeve 13 is defined as the side pressing edge 15. The first sleeve 12 is provided with a sliding groove 16. When viewed in the projection of the cross-section perpendicular to the central axis, the opening angle of the sliding groove 16 is equal to or less than 135 degrees. The first base plate 11 is provided with a plurality of mounting holes 14 for screws or pins to pass through to fix the first base plate to a wall or a door panel, etc.

[0045] The second page plate 20 includes an integrally formed second base plate 21 and a third sleeve 22. The third sleeve 22 is 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. A through hole is formed through the three of them to form the same central axis, and the through hole is used to accommodate the pivot assembly. A first gap 24 is formed between the side pressing edge 15 and the outer surface of the opposite third sleeve. A fixing through hole 23 is provided in the lower part of the third sleeve 22. The second base plate 21 is also provided with a plurality of mounting holes for screws to pass through to fix the second base plate to a wall or a door panel, etc.

[0046] The pivot assembly includes a torsion spring 30, a movable connection unit, a fixed connection unit, and two end caps 40. The two ends of the torsion spring 30 are respectively clamped to the movable connection unit and the fixed connection unit. The movable connection unit is rotatable relative to the third sleeve 22; and the movable connection unit is also rotatable relative to the first sleeve 12; the fixed connection unit is not rotatable relative to the third sleeve 22.

[0047] As Figure 3 and Figure 6As shown, the movable connection unit includes a first rotating shaft 60 and a latch pin 50. The first rotating shaft 60 is made of metal and has a cylindrical main body 61 and a first clamping portion 63; the cylindrical main body 61 has an inner cavity, and six positioning holes 62 are radially symmetrically arranged on the cylindrical main body 61. The top end of the first rotating shaft 60 is sealed within the first sleeve 12 by an end cap 40. As Figure 4 shown, the upper part of the first rotating shaft 60 is within the first sleeve 12, and the lower part is within the third sleeve 22.

[0048] It should be understood that in other embodiments, eight positioning holes or the like may be radially symmetrically arranged on the cylindrical main body, and reasonable settings are made according to needs.

[0049] As Figure 3 and Figure 5 shown, the latch pin 50 includes an integrally formed slender body 51 and a head 52, and the size of the head 52 is greater than the width of the sliding groove 16 to prevent the head 52 from entering the positioning hole 62 and the sliding groove 16. The slender body 51 of the latch pin 50 can pass through a pair of symmetric positioning holes 62. It should be understood that the gap between the side of the second substrate 21 corresponding to the sliding groove 16 and the outer surface of the first sleeve should be wide enough so that the movement of the head 52 of the latch pin 50 is not hindered by the second substrate.

[0050] As Figure 3 , both ends of the torsion spring 30 have a flat head, and the flat head of the torsion spring 30 is embedded in the first clamping portion 63.

[0051] As Figure 3 , the fixed connection unit includes a positioning mechanism 70, a second rotating shaft 80, and a buffer connecting member 90. The second rotating shaft 80 and the buffer connecting member 90 are fixedly connected for transmission, and the positioning mechanism 70 is fixedly connected to the second rotating shaft 80.

[0052] As Figure 3 and Figure 7 shown, the second rotating shaft 80 is made of metal and has a receiving hole 81 radially arranged. The receiving hole 81 communicates with the fixed through hole 23 of the third sleeve 22, so that the longitudinal positioning mechanism 70 is installed in the receiving hole 81 through the fixed through hole 23. The second rotating shaft 80 has a second clamping portion 82; the flat head of the torsion spring 30 is embedded in the second clamping portion 82. The second rotating shaft 80 is also provided with a hexagonal hole 83. As Figure 4 shown, a part of the second rotating shaft 80 is within the third sleeve 22, and a part is within the second sleeve 13.

[0053] As Figure 4 and Figure 5As shown, the positioning mechanism 70 includes a cylinder body 72, a pressing spring 71, and a positioning ball 73; both ends of the cylinder body 72 are inwardly converged to hold the pressing spring 71 and the positioning ball 73 within the cylinder body 72. When there is no external force, the pressing spring 71 pushes up the positioning ball 73, causing the positioning ball 73 to partially protrude from the port of the cylinder body 72. A part of the cylinder body is exposed outside the third sleeve, so that without external force, the positioning ball 73 is exposed on the outer surface of the third sleeve; the height at which the positioning mechanism 70 is exposed on the outer surface of the third sleeve is greater than the first gap 24.

[0054] As Figure 3 and Figure 7 shown, the buffer connecting member 90 includes a cylindrical plastic main body 91 and a long strip-shaped metal core 93, and a part of the metal core is embedded in the plastic main body 91. The cross-section of the metal core 93 is hexagonal. After the metal core 93 passes through a plastic gasket 95, it is installed in the hexagonal hole 83 of the second rotating shaft 80, so that the buffer connecting member 90 is fixedly connected to the second rotating shaft 80 for transmission. A convex rib 92 is provided on the outer surface of the plastic main body 81, and the convex rib 92 corresponds to the axial gap 130 formed when the second sleeve 13 is bent. The bottom end of the plastic main body 81 is sealed within the second sleeve 13 by an end cover 40. As Figure 4 shown, the buffer connecting member 90 is located within the second sleeve 13.

[0055] In the first case, for the adjustable-position hinge of the present invention, when the first page plate 10 and the second page plate 20 are completely closed, the pin has not been inserted into the positioning hole. With the aid of a tool, the first rotating shaft is rotated in the first sleeve (for example, a metal bar is inserted into a certain positioning hole and force is applied to rotate the first rotating shaft within the first sleeve) so that the torsion spring generates an initial torsion force; then, the pin is inserted into a suitable positioning hole. At this time, when viewed in the projection of the cross-section perpendicular to the central axis, after the pin 50 is inserted into the positioning hole 62, the position of the positioning hole 62 makes the included angle α between the pin 50 and the positioning mechanism 70 within 0 degrees (due to installation accuracy and tolerances of components, there may be an error within 5 degrees), referring to Figure 8 and Figure 10 shown; the working principle is as follows:

[0056] The first stage: the opening process. At this time, when the first page plate 10 and the second page plate 20 are opened, an external force is required to overcome the restoring force of the torsion spring 30. During this opening process, the pin 50 is abutted by the edge of the sliding groove 16 (this edge refers to the inner wall of the sliding groove 16 close to the positioning mechanism when viewed in the projection of the cross-section perpendicular to the central axis); when the external force reaches a certain level, the side pressing edge 15 of the first page plate 10 compresses the pressing spring 71 inward, and the positioning ball 73 contracts inward, enabling the side pressing edge 15 to scrape past the positioning ball 73.

[0057] Second stage: positioning state. When the side pressing edge 15 has scraped across the positioning ball, and the opening angle between the first page plate 10 and the second page plate 20 is greater than a preset angle (about 90 degrees in this embodiment, within an error of 5 degrees), the external force is withdrawn. Due to the restoring force of the torsion spring 30, the first page plate 10 and the second page plate 20 close by relying on the restoring force of the torsion spring. However, without an external force, the restoring force of the torsion spring 30 is not sufficient to force the side pressing edge 15 to compress the abutting spring 71 inward, so that the side pressing edge 15 cannot scrape across the positioning ball 73. Therefore, the first page plate 10 is blocked by the protruding positioning ball 73. In addition, the latch 50 is abutted against the edge of the sliding groove 16; in this way, it is equivalent to that both ends of the torsion spring are restricted, so that after the first page plate 10 and the second page plate 20 are closed to the preset angle, they remain static, as Figure 9 shown.

[0058] Third stage: closing process. Apply an external force so that when the external force reaches a certain level, the side pressing edge 15 of the first page plate 10 compresses the abutting spring 71 inward, and the positioning ball 73 contracts inward, causing the side pressing edge 15 to scrape across the positioning ball 73; after the side pressing edge 15 has scraped across the positioning ball 73, at first, due to the relatively large restoring force of the torsion spring, it can cause the first page plate 10 and the second page plate 20 to close even without an external force; however, since the restoring force of the torsion spring gradually decreases and finally is not sufficient to overcome the friction inside the pivot assembly, a small amount of external force is needed to overcome the friction inside the pivot assembly to close the first page plate 10 and the second page plate 20.

[0059] In the second case, for the adjustable positioning hinge of the present invention, when the first page plate 10 and the second page plate 20 are completely closed, in the projection of the cross-section perpendicular to the central axis, after the latch 50 is inserted into the positioning hole 62, the position of the positioning hole 62 makes the included angle between the latch 50 and the positioning mechanism 70 60 degrees (due to installation accuracy and tolerances of components, there may be an error within 5 degrees), refer to Figure 10 shown, and the working principle is as follows:

[0060] First stage: opening process. At this time, when opening the first page plate 10 and the second page plate 20, an external force is required to overcome the restoring force of the torsion spring. When the external force reaches a certain level, the side pressing edge 15 of the first page plate 10 compresses the abutting spring 71 inward, and the positioning ball 73 contracts inward, enabling the side pressing edge 15 to scrape across the positioning ball 73.

[0061] Second stage: positioning state. When the side pressing edge 15 has scraped past the positioning ball, and the opening angle (such as 180 degrees) between the first page plate 10 and the second page plate 20 is greater than the preset angle (in this embodiment, the preset angle is approximately 120 degrees with an error within 5 degrees), the external force is withdrawn. Due to the restoring force of the torsion spring, the first page plate 10 and the second page plate 20 naturally close. However, at this time, the constraints on both ends of the torsion spring are less than those when the included angle between the detent and the positioning mechanism is 0 degrees in the first case. When the first page plate 10 and the second page plate 20 close to a certain extent and the first page plate 10 has not yet contacted the positioning ball 73, the restoration of the torsion spring is completely completed, and the first page plate 10 and the second page plate 20 have no force to close and remain static.

[0062] Third stage: closing process. Apply an external force such that when the external force reaches a certain level, the side pressing edge 15 of the first page plate 10 compresses the abutting spring 71 inward, and the positioning ball 73 contracts inward, causing the positioning ball 73 to abut against the side pressing edge 15; when the side pressing edge 15 has scraped past the positioning ball 73, due to insufficient restoring force of the torsion spring or the restoration being completed, at this time, even if the external force is withdrawn, the first page plate 10 and the second page plate 20 cannot close, and an external force needs to be continuously applied to close the first page plate 10 and the second page plate 20.

[0063] In summary, the positioning hole can be adjusted relative to the sliding groove so that the torsion spring generates different degrees of initial restoring force; the detent is inserted into the positioning holes at different positions, so that different degrees of constraints are imposed on both ends of the torsion spring, thereby determining the magnitude of the restoring force of the torsion spring. If the detent is not inserted into any positioning hole, then the rotation of the first rotating shaft is not restricted, and the torsion spring loses its function.

[0064] The adjustable positioning hinge of the present invention has the following advantages:

[0065] (1) For the adjustable positioning hinge of the present invention, when the first page plate 10 and the second page plate 20 are completely closed, the detent has not been inserted into the positioning hole. With the aid of a tool, the first rotating shaft is rotated in the first sleeve (for example, a metal bar is poked into a certain positioning hole and force is applied to make the first rotating shaft rotate within the first sleeve), so that the torsion spring generates an initial torsional force, which is convenient for the operator to adjust according to the actual situation.

[0066] (2) The detent 50 can be adjustably inserted through the positioning hole 62, so that different degrees of constraints are imposed on both ends of the torsion spring 30, thereby determining the magnitude of the restoring force of the torsion spring. The detent is convenient to insert and remove, making it convenient to adjust and position the first page plate and the second page plate to the preset angle; it should be understood that the more positioning holes are provided, the finer the adjustable angle of the detent is, and the more accurate the adjustment to the preset angle is.

[0067] (3) The upper part of the first rotating shaft 60 made of metal is located in the first sleeve 12, and the lower part is located in the third sleeve; the upper part of the second rotating shaft 80 made of metal is located in the third sleeve 22, and the lower part is located in the second sleeve 13; in this way, at the connecting parts of the first sleeve 12, the second sleeve 13, and the third sleeve 22 made of metal, all are metal parts with similar strength, firm connection, and not easily damaged;

[0068] (4) The common angle for opening the hinge is within 180 degrees. When viewed in the projection of the cross-section perpendicular to the central axis, the opening angle of the sliding groove 16 is equal to or less than 135 degrees; in coordination with the opening angle of the sliding groove, when viewed in the projection of the cross-section perpendicular to the central axis, the latch is located in different positioning holes (in the case of setting six positioning holes), and can form an angle in the range of approximately 0 degrees to 120 degrees with the positioning mechanism. In this way, it can basically meet the preset angles for common hinge positioning;

[0069] (5) A buffer connecting member 90 with a plastic main body is adopted. The plastic material is easier to process than the metal material. The plastic main body is used in combination with damping oil to reduce the damage caused by the strong bending of the torsion spring and extend the service life of the torsion spring;

[0070] (6) A convex rib 92 is provided on the outer surface of the plastic main body 91. The convex rib 92 corresponds to the axial gap 130 formed when the second sleeve 13 is bent. Near the axial gap 130, the convex rib 92 can rotate slightly; away from the axial gap, the convex rib cannot be accommodated; in this way, the rotation of the buffer connecting member 90 is maintained within a fine range, enabling the pivot assembly to be adapted during installation;

[0071] (7) The first rotating shaft can rotate relative to the first sleeve, and a tool can be used to adjust the positioning hole of the first rotating shaft to an appropriate position so that the positioning hole is not blocked by the inner wall of the first sleeve, facilitating the latch to easily pass through the sliding groove and insert into the positioning hole for easy operation.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An adjustable positioning hinge, characterized in that, Comprising: A first page board, including an integrally formed first substrate, a first sleeve, and a second sleeve. The first sleeve and the second sleeve are located on the same side of the first substrate. The first sleeve is connected to the upper part of the first substrate, and the second sleeve is connected to the lower part of the first substrate. The edge in the thickness direction of the first substrate between the first sleeve and the second sleeve is a side pressing edge. The first sleeve is provided with a sliding groove, and the second sleeve is provided with an axial slit; A second page board, including an integrally formed second substrate and a third sleeve. The third sleeve is located between the first sleeve and the second sleeve. The hollow spaces of the first sleeve, the second sleeve, and the third sleeve penetrate to form a through hole. The third sleeve is provided with a fixed through hole, and the side pressing edge and the outer surface of the opposite third sleeve form a first gap; A pivot assembly, located in the through hole, including a torsion spring, a movable connection unit, and a fixed connection unit. The two ends of the torsion spring are respectively clamped to the movable connection unit and the fixed connection unit, wherein: The movable connection unit has a pin, and the pin is adjustably inserted into the sliding groove; when the first page board and the second page board are opened around the central axis of the through hole, the pin is abutted by the edge of the sliding groove; The fixed connection unit is provided with a positioning mechanism. The positioning mechanism is exposed on the outer surface of the third sleeve through the fixed through hole, and the exposed height is greater than the first gap; the positioning mechanism has a pressing spring. When the first page board and the second page board are opened or closed around the central axis of the through hole by an external force, the pressing spring is compressed inward to press the positioning mechanism against the side pressing edge for passing the positioning mechanism through the first gap; The fixed connection unit includes a second rotating shaft and a buffer connecting member. The buffer connecting member is located within the second sleeve. The buffer connecting member is fixedly connected to the second rotating shaft. The second rotating shaft is made of metal. The upper part of the second rotating shaft is located in the third sleeve, and the lower part is located in the second sleeve. The buffer connecting member includes a plastic main body and a metal core fixedly connected to the lower part of the second rotating shaft. The upper part of the metal core is connected to the lower part of the second rotating shaft, and the lower part of the metal core is embedded in the upper part of the plastic main body. The plastic main body is located in the second sleeve; the plastic main body is in a cylindrical shape, and a rib is provided on the outer surface, and the rib corresponds to the axial slit of the second sleeve.

2. The adjustable-position hinge according to claim 1, wherein, The movable connection unit further includes a first rotating shaft; one end of the torsion spring is clamped to the first rotating shaft. The first rotating shaft is provided with a plurality of positioning holes at different positions for the pin to selectively insert, and the positioning holes are rotatable relative to the sliding groove.

3. The adjustable-position hinge according to claim 2, wherein The second rotating shaft is radially provided with a receiving hole for placing the positioning mechanism; the positioning mechanism is integrally in a longitudinal shape, having a cylinder body for placing the pressing spring, and a positioning ball clamped within the cylinder body and partially exposed at the port of the cylinder body.

4. The adjustable-position hinge according to claim 2, wherein Viewed from the projection of the cross-section perpendicular to the central axis, when the pin is located in different positioning holes, an included angle in the range of 0 degrees to 120 degrees can be formed with the positioning mechanism.

5. The adjustable-position hinge according to claim 2, characterized in that, The first rotating shaft has a cylindrical main body and a first clamping portion. The cylindrical main body is radially symmetrically provided with an even number of positioning holes equal to or greater than six. The pin is inserted through a pair of symmetric positioning holes; one end of the torsion spring is clamped to the first clamping portion.

6. The adjustable-position hinge according to claim 1, wherein The snap pin includes an integrally formed slender body and a head, and the size of the head is larger than the width of the sliding groove to prevent the head from entering the positioning hole and the sliding groove.

7. An adjustable positioning hinge, characterized in that, Comprising: A first page plate, including an integrally formed first substrate, a first sleeve and a second sleeve. The first sleeve and the second sleeve are located on the same side of the first substrate. The first sleeve is connected to the upper part of the first substrate, and the second sleeve is connected to the lower part of the first substrate. The edge in the thickness direction of the first substrate between the first sleeve and the second sleeve is a side pressing edge. The first sleeve is provided with a sliding groove, and the second sleeve is provided with an axial slit; A second page plate, including an integrally formed second substrate and a third sleeve. The third sleeve is located between the first sleeve and the second sleeve. The hollow spaces of the first sleeve, the second sleeve and the third sleeve penetrate to form a through hole. A first gap is formed between the outer surface of the third sleeve and the side pressing edge. The third sleeve is provided with a fixing through hole; A pivot assembly, located in the through hole, including a torsion spring, a movable connection unit and a fixed connection unit. The two ends of the torsion spring are respectively clamped to the movable connection unit and the fixed connection unit, wherein: The movable connection unit has a plurality of positioning holes and a snap pin. The positioning holes can rotate relative to the sliding groove, and the snap pin passes through the sliding groove and the positioning holes; when the first page plate and the second page plate are opened around the central axis of the through hole, the snap pin is abutted by the edge of the sliding groove; The fixed connection unit is provided with a positioning mechanism. The positioning mechanism is exposed on the outer surface of the third sleeve through the fixing through hole and the exposed height is greater than the first gap; the positioning mechanism has a pressing spring. When the first page plate and the second page plate are opened or closed around the central axis of the through hole by an external force, the pressing spring is compressed inward to press the positioning mechanism against the side pressing edge for passing the positioning mechanism through the first gap; The fixed connection unit includes a second rotating shaft and a buffer connecting piece. The buffer connecting piece is located inside the second sleeve. The buffer connecting piece is fixedly connected to the second rotating shaft. The second rotating shaft is made of metal. The upper part of the second rotating shaft is located in the third sleeve, and the lower part is located in the second sleeve. The buffer connecting piece includes a plastic main body and a metal core fixedly connected to the lower part of the second rotating shaft. The lower part of the metal core is embedded in the upper part of the plastic main body, and the plastic main body is located in the second sleeve; the plastic main body is in a cylindrical shape, and a convex rib is arranged on the outer surface, and the convex rib corresponds to the axial slit of the second sleeve.

8. The adjustable positioning hinge according to claim 1 or 7, characterized in that, Viewed from the projection of the cross-section perpendicular to the central axis, the opening angle of the sliding groove is equal to or less than 135 degrees.

Images