Positioning hinge

Abstract

A positioning hinge comprises a hinge seat, a hinge arm and a pin shaft, a seat through hole is formed in the hinge seat, the U-shaped hinge arm is provided with a first cross arm, a second cross arm and a vertical arm connected to the first cross arm and the second cross arm, the middle section of the pin shaft is inserted into the seat through hole, and the two ends of the pin shaft extend out of the seat through hole and are connected to the first cross arm and the second cross arm respectively; the positioning disc, the positioning wheel and the driving spring are arranged in the base through hole, the positioning disc is connected to the middle section of the pin shaft in a sleeving mode but does not rotate along with the pin shaft, a positioning groove is further formed in the inner side wall of the positioning disc, the positioning wheel is rotatably connected to the pin shaft through a wheel shaft, and the center line of the positioning wheel is perpendicular to the center line of the pin shaft; the positioning wheel can abut against the inner side wall face of the positioning disc under the action of the driving spring. When the hinge arm drives the pin shaft to rotate, the pin shaft drives the positioning wheel to rotate synchronously, and the positioning wheel rolls on the inner side wall face of the positioning disc and can roll into the positioning groove, so that the hinge arm is temporarily positioned.

Description

Technical Field

[0001] The present invention relates to the technical field related to hinges, and in particular to a positioning hinge. Background Art

[0002] Hinge is a commonly used connecting member in furniture. A general hinge includes a hinge shaft and two hinge leaves rotatably connected to the hinge shaft. By connecting the two hinge leaves to the cabinet body and the cabinet door respectively, the cabinet door can be opened and closed by rotating back and forth around the center line of the hinge shaft. However, the cabinet door using such a hinge is easy to loosen because it cannot be positioned. For this reason, people have made improvements to the hinge. For example, the Chinese utility model patent with publication number CN85204362U discloses a stepless positioning hinge with adjustable rotation tightness. The rotating leaf tubular housing of the hinge is equipped with a brake (friction) block that can only slide axially, a compression spring, and an adjusting nut. Together with the fixed leaf, they are connected by an adjusting screw to form a set of pressure-adjustable (i.e., rotationally adjustable tightness) mechanism that can achieve stepless positioning. However, as the number of times the cabinet door is used increases, the brake block of the hinge will be worn out due to friction, and the cabinet door will become loose, which requires the setting of an adjusting nut or the replacement of the brake block, which is very inconvenient. Summary of the invention

[0003] In order to overcome at least one of the above-mentioned problems existing in the hinges of the prior art, the present invention proposes a positioning hinge, comprising an articulated seat, an articulated arm and a pin shaft, wherein the articulated seat is provided with a seat through hole, the U-shaped articulated arm comprises a first cross arm, a second cross arm and a vertical arm connected to the first cross arm and the second cross arm, the middle section of the pin shaft is inserted into the seat through hole, the two ends of the pin shaft extend out of the seat through hole and are respectively connected to the first cross arm and the second cross arm; the present invention also comprises a positioning plate, a positioning wheel and a driving spring arranged in the seat through hole, the positioning plate is sleeved on the A positioning groove is also provided on the inner wall of the positioning plate, which is on the middle section of the pin shaft but does not rotate with the pin shaft. The positioning wheel is rotatably connected to the pin shaft through a wheel shaft, and the center line of the positioning wheel is arranged perpendicular to the center line of the pin shaft. Under the action of the driving spring, the positioning wheel can be pressed against the inner wall surface of the positioning plate; when the articulated arm drives the pin shaft to rotate, the pin shaft rotates synchronously with the positioning wheel, and the positioning wheel rolls on the inner wall surface of the positioning plate and can roll into the positioning groove to temporarily position the articulated arm.

[0004] The articulated seat and the articulated arm are two components connected together by the pin shaft, and the two components can rotate relative to each other around the center line of the pin shaft. The articulated arm is connected to both ends of the pin shaft through the first cross arm and the second cross arm, and also extends to both ends of the articulated seat. The advantage of such a setting is that the forces at both ends of the pin shaft and the articulated seat are better balanced, so that the articulated arm can rotate more smoothly.

[0005] The positioning plate is a positioning member sleeved on the pin shaft, but the positioning plate does not rotate circumferentially with the pin shaft when in use; depending on the implementation, the positioning plate can be fixedly connected to the hole wall of the seat through hole, or can move back and forth in the seat through hole along the axial direction of the pin shaft. The positioning plate includes upper and lower side walls and circumferential side walls, wherein the wall surface of the upper and lower side walls facing the positioning wheel is defined as the inner wall surface, and the wall surface on the opposite side is the outer wall surface. The positioning plate is made of plastic or metal.

[0006] Furthermore, the positioning groove provided on the positioning plate is a groove-shaped structure with a middle bottom and high sides, which is used to cooperate with the positioning wheel to limit the rotation of the positioning wheel and the pin shaft. The inner wall surface of the positioning plate includes the groove wall surface of the groove and the flat connection surface connected to the groove wall surface of the groove, but the groove wall surface and the flat connection surface are both smooth surfaces, so that the positioning wheel can roll smoothly on the wall surface. When the positioning wheel falls into the positioning groove, the groove only temporarily positions the positioning wheel, and when the driving force is large enough, the positioning wheel can roll out of the positioning groove.

[0007] Among them, the number of the positioning grooves can be set to only one, but this is suitable for the case where there is only one positioning position for defining the articulated arm. In order to facilitate positioning, at least two positioning grooves arranged at intervals are generally set on the inner side wall of the positioning plate, so that the starting point and the end point can be defined, and the central angle angle range formed by the positions of the two positioning grooves and the center of the positioning plate can be set to 45°~270°. When using a single positioning wheel for positioning, the two positioning grooves arranged at a certain angle can be used as the starting point and end point of the rotation of the articulated arm. When using the positioning wheels mentioned below in a group of two for positioning, the two positioning grooves with a central angle of 180° are grouped as a group. If the rotation angle of the articulated arm is set to 180°, only one group of positioning grooves is required; if the rotation angle of the articulated arm is not 180°, at least two groups of positioning grooves with a certain angle need to be set, and the angle range of the two groups of positioning grooves is generally set to 45°~160°.

[0008] The positioning wheel includes a roller body and a wheel shaft, the roller body can rotate around the center line of the wheel shaft, and the pin shaft can rotate the roller body in the circumferential direction through the wheel shaft when rotating; for the convenience of connection, a mounting hole is generally provided on the pin shaft, the wheel shaft is connected to the mounting hole, and the roller body is arranged on the side of the pin shaft and can rotate freely; in order to make the positioning wheel roll more smoothly on the positioning plate, at least a pair of positioning wheels arranged in an axisymmetric manner are included, the wheel shaft is plugged into the pin shaft, and a pair of positioning wheels are connected to the two ends of the wheel shaft. The positioning plate is made of plastic or metal.

[0009] According to the above technical scheme, compared with the prior art, the beneficial technical effects of the present invention are: first, under the action of the driving spring, the positioning wheel can be pressed against the inner wall surface of the positioning plate and can roll back and forth on the inner surface of the positioning plate, which not only provides a certain positioning force for the rotation of the articulated arm, but also reduces the friction between the positioning wheel and the positioning plate, so that the rotation of the pin shaft and the articulated arm is smooth and the service life of the positioning wheel and the positioning plate is improved; second, by arranging a fixed positioning groove on the positioning plate, a sufficiently large limiting force can be provided for the positioning wheel, that is, the articulated arm stops in a stable posture when it is rotated to a set angle; third, the U-shaped articulated arm is connected to the articulated seat in an up-and-down (or left-and-right) clamping manner, which not only increases the connection strength of the pin shaft, the articulated seat and the articulated arm, but also makes the up-and-down (or left-and-right) forces at the hinge more balanced, and when the outer end of the articulated arm is subjected to a large force, the articulated arm can still maintain a good rotation posture.

[0010] In order to ensure the stability of the positioning plate when it moves up and down, the positioning plate is arranged between the positioning wheel and the driving spring, a guide pin is arranged on the circumferential side wall of the positioning plate, and a long pin hole is arranged on the side wall of the hole of the seat through hole, the guide pin is movably inserted in the pin hole, and one end of the driving spring is connected to the outer side wall of the positioning plate. Under the action of the driving spring and the positioning wheel, the positioning plate can move back and forth along the center line direction of the pin shaft under the guidance of the pin hole.

[0011] Furthermore, in order to facilitate the adjustment of the positioning angle, a plurality of spaced-apart disk connecting holes are provided on the circumferential side wall of the positioning disk, and the pin hole on the hole side wall of the seat through hole is a through hole, and the guide pin can pass through the pin hole from the outside to the inside and be connected to the pin hole of the positioning disk in an optional manner.

[0012] A further technical solution may be that a flange is also provided at one end of the pin shaft, the diameter of the flange is larger than the aperture of the seat through hole, at least one fixing screw hole is provided on the flange, and a fixing through hole is provided on the first cross arm or the second cross arm, and a fixing screw can pass through the fixing through hole and be connected to the fixing screw hole of the flange, thereby fixing the first cross arm or the second cross arm to the flange.

[0013] A further technical solution may be that a buffer mechanism is provided on the articulated seat and / or the articulated arm.

[0014] A further technical solution may be that rolling bearings are respectively arranged at both ends of the seat through hole, the pin shaft is inserted into the two rolling bearings, and a gasket is arranged between the rolling bearing and the first cross arm or the second cross arm, and the gasket is arranged to help increase the service life of the product.

[0015] Since the present invention has the above characteristics and advantages, it can be applied to positioning hinges. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the axial structure of the positioning hinge using the technical solution of the present invention;

[0017] Figure 2 is a schematic diagram of the exploded structure of the positioning hinge;

[0018] Figure 3 is a schematic diagram of the cross-sectional structure of the positioning hinge in the front view direction, showing the first implementation mode;

[0019] Figure 4 yes Figure 3 A schematic cross-sectional structure diagram along the AA direction, showing the state in which the positioning wheel is combined with the groove;

[0020] Figure 5 is a schematic diagram of the structure of the positioning disk in the axial direction;

[0021] Figure 6 It is a schematic diagram of the shaft side structure of the pin shaft and the positioning wheel in the combined state. DETAILED DESCRIPTION

[0022] The structure of the positioning hinge using the technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0023] Except for those explicitly stated to be equivalent or alternative implementation schemes, the various implementation details disclosed below can be selectively applied or combined in one embodiment even if they are not directly related or synergistic in terms of functions.

[0024] like Figures 1 to 4 As shown, the positioning hinge includes an articulated seat 1, an articulated arm 2 and a pin 3, the articulated seat 1 is provided with a seat through hole 10, the U-shaped articulated arm 2 has a first cross arm 21, a second cross arm 22 and a vertical arm 23 connected to the first cross arm 21 and the second cross arm 22, the middle section of the pin 3 is inserted into the seat through hole 10, and the two ends of the pin 3 extend out of the seat through hole 10 and are respectively connected to the first cross arm 21 and the second cross arm 22; it also includes a positioning plate 4, a positioning wheel 5 and a driving spring 6 arranged in the seat through hole 10, the positioning plate 4 is sleeved on the middle section of the pin 3 but does not follow the The pin shaft 3 rotates, and a positioning groove 40 is also provided on the inner side wall 41 of the positioning plate 4. The positioning wheel 5 is rotatably connected to the pin shaft 3 through a wheel shaft, and the center line of the positioning wheel 5 is arranged perpendicular to the center line of the pin shaft 3. Under the action of the driving spring 6, the positioning wheel 5 can be pressed against the surface of the inner side wall 41 of the positioning plate 4; when the articulated arm 2 drives the pin shaft 3 to rotate, the pin shaft 3 rotates synchronously with the positioning wheel 5, and the positioning wheel 5 rolls on the surface of the inner side wall 41 of the positioning plate 4 and can roll into the positioning groove 40 to temporarily position the articulated arm 2.

[0025] The articulated seat 1 and the articulated arm 2 are two components connected together by the pin shaft 3, and the two components can rotate relative to each other around the center line of the pin shaft 3. The articulated seat 1 is generally used to be fixedly connected to the inner side wall 41 of the cabinet, and the articulated arm 2 is connected to both ends of the pin shaft 3 through the first cross arm 21 and the second cross arm 22, and also extends to both ends of the articulated seat 1. The vertical arm 23 is used to connect the movable load-bearing bracket or cabinet door assembly. The advantage of such a setting is that the forces at both ends of the pin shaft 3 and the articulated seat 1 are better balanced, so that the articulated arm 2 and the bracket or cabinet door connected to the articulated arm 2 can rotate more smoothly.

[0026] like Figure 2~Figure 5As shown, the positioning plate 4 is a positioning member sleeved on the pin shaft 3, but the positioning plate 4 does not rotate circumferentially with the pin shaft 3 when in use; according to different embodiments, the positioning plate 4 can be fixedly connected to the hole wall of the seat through hole 10, or can move back and forth in the seat through hole 10 along the axial direction of the pin shaft 3. The positioning plate 4 includes upper and lower side walls and circumferential side walls 43, wherein the wall surface of the upper and lower side walls facing the side of the positioning wheel 5 is defined as the inner side wall 41, and the wall surface on the opposite side is the outer side wall 42. The positioning groove 40 on the positioning plate 4 is a groove-shaped structure with a middle bottom and high sides for cooperating with the positioning wheel 5 to limit the rotation of the positioning wheel 5. In this embodiment, two positioning grooves 40 are arranged at intervals on the inner side wall 41 of the positioning plate 4, and a flat connecting surface is connected between the two positioning grooves 40. The groove wall surface and the flat connecting surface are both smooth surfaces, so that the positioning wheel 5 can roll smoothly on the wall surface.

[0027] In this embodiment, two positioning wheels 5 are connected to the pin shaft 3 and are arranged opposite to each other and rotate simultaneously. The two positioning wheels 5 are set as a group, and the two matching positioning grooves 40 are also set as a group. The central angle formed by the positions of the two positioning grooves 40 and the center of the positioning plate 4 is 180°. This arrangement can limit the rotation of the articulated arm 2 when it rotates 180° and stop rotating. If the rotation angle of the articulated arm 2 is not 180°, at least two groups of positioning grooves 40 arranged at a certain angle are required. The angle range of the two groups of positioning grooves 40 is generally set to 45°~160°.

[0028] Furthermore, the positioning wheel 5 includes a roller body 51 and a wheel axle 52. The roller body 51 can rotate around the center line of the wheel axle 52. When the pin 3 rotates, the roller body 51 can be rotated in the circumferential direction through the wheel axle 52. For the convenience of connection, a mounting hole 31 is generally provided on the pin 3. The wheel axle 52 is connected to the mounting hole 31. The roller body 51 is arranged on the side of the pin 3 and can rotate freely. In this embodiment, a pair of positioning wheels 5 are included. The wheel axle 52 is plugged into the pin 3. A pair of positioning wheels 5 are connected to both ends of the wheel axle 52.

[0029] The positioning wheel 5 can roll back and forth on the inner surface of the positioning plate 4. When the positioning wheel 5 rolls down or out of the positioning groove 40, the positioning plate 4 will move upward or downward relative to the positioning wheel 5, so that the positioning plate 4 can stably move back and forth along the center line direction of the pin shaft 3. Figure 3 and Figure 4As shown, the positioning plate 4 is arranged between the positioning wheel 5 and the driving spring 6, and a guide pin 44 is arranged on the circumferential side wall 43 of the positioning plate 4. A long strip pin hole 11 is arranged on the hole side wall of the seat through hole 10, and the guide pin 44 is movably inserted in the pin hole 11. One end of the driving spring 6 is connected to the outer side wall of the positioning plate 4. Under the action of the driving spring 6 and the positioning wheel 5, the positioning plate 4 can move back and forth along the center line direction of the pin shaft 3 under the guidance of the pin hole 11.

[0030] Furthermore, in order to facilitate the fixing of the guide pin 44 and the adjustment of the positioning angle, a plurality of disk connecting holes 45 arranged at intervals are provided on the circumferential side wall 43 of the positioning disk 4, and the elongated pin hole 11 is a through hole. The guide pin 44 can pass through the pin hole 11 from the outside to the inside, and then be connected to the disk connecting hole 45 of the positioning disk 4 in an alternative manner.

[0031] A further technical solution may be that a flange 32 is further provided at one end of the pin shaft 3, the diameter of the flange 32 is larger than the aperture of the seat through hole 10, a fixing screw hole 33 is provided on the flange 32, and a fixing through hole 24 is provided on the first cross arm 21, and a fixing screw can pass through the fixing through hole 24 and be connected to the fixing screw hole 33 of the flange 32, so that the first cross arm 21 or the second cross arm 22 is fixedly connected to the flange 32. The flange 32 may also be provided with a plurality of fixing screw holes 33 arranged at intervals, and the position of the first cross arm 21 may be conveniently adjusted by connecting different fixing screw holes 33.

[0032] A further technical solution may be that rolling bearings 71 are respectively provided at both ends of the seat through hole 10, and the pin shaft 3 is inserted into the two rolling bearings 71. A gasket 72 is also provided between the rolling bearing 71 and the first cross arm 21 or the second cross arm 22, and the provision of the gasket is conducive to improving the service life of the product.

[0033] A further technical solution may be that a buffer mechanism 8 is provided on the articulated seat 1 and / or the articulated arm 2, and the buffer mechanism 8 is a soft rubber pad or a buffer gas rod.

[0034] According to the above technical scheme, compared with the prior art, the beneficial technical effects of the present invention are: first, under the action of the driving spring 6, the positioning wheel 5 can be pressed against the surface of the inner wall 41 of the positioning plate 4 and can roll back and forth on the inner surface of the positioning plate 4, which not only provides a certain positioning force for the rotation of the articulated arm 2, but also reduces the friction between the positioning wheel 5 and the positioning plate 4, so that the rotation of the pin shaft 3 and the articulated arm 2 is smooth, and the service life of the positioning wheel 5 and the positioning plate 4 is also improved; second, By arranging a fixed positioning groove 40 on the positioning plate 4, a sufficiently large limiting force can be provided for the positioning wheel 5, so that the articulated arm 2 can stop in a stable posture when it is rotated to a set angle; thirdly, the U-shaped articulated arm 2 is connected to the articulated seat 1 in an up and down (or left and right) clamping manner, which not only increases the connection strength between the pin shaft 3 and the articulated seat 1 and the articulated arm 2, but also makes the up and down (or left and right) forces at the hinge more balanced. When the outer end of the articulated arm 2 is subjected to a large force, the articulated arm 2 can still maintain a good rotation posture.

Claims

1. A positioning hinge, comprising an articulated seat, an articulated arm and a pin shaft, wherein the articulated seat is provided with a seat through hole, the U-shaped articulated arm comprises a first horizontal arm, a second horizontal arm and a vertical arm connected to the first horizontal arm and the second horizontal arm, the middle section of the pin shaft is inserted into the seat through hole, and the two ends of the pin shaft extend out of the seat through hole and are respectively connected to the first horizontal arm and the second horizontal arm; characterized in that: It also includes a positioning plate, a positioning wheel and a driving spring arranged in the seat through hole, the positioning plate is sleeved on the middle section of the pin shaft but does not rotate with the pin shaft, and a positioning groove is also arranged on the inner wall of the positioning plate, the positioning wheel is rotatably connected to the pin shaft through a wheel axle, and the center line of the positioning wheel is arranged perpendicular to the center line of the pin shaft, and under the action of the driving spring, the positioning wheel can be pressed against the inner wall surface of the positioning plate; when the articulated arm drives the pin shaft to rotate, the pin shaft rotates synchronously with the positioning wheel, and the positioning wheel rolls on the inner wall surface of the positioning plate and can roll into the positioning groove to temporarily position the articulated arm.

2. The positioning hinge according to claim 1, characterized in that: The positioning plate is arranged between the positioning wheel and the driving spring, a guide pin is arranged on the circumferential side wall of the positioning plate, a long strip pin hole is arranged on the hole side wall of the seat through hole, the guide pin is movably inserted in the pin hole, one end of the driving spring is connected to the outer side wall of the positioning plate, under the action of the driving spring and the positioning wheel, the positioning plate can move back and forth along the center line direction of the pin shaft under the guidance of the pin hole.

3. The positioning hinge according to claim 2, characterized in that: The circumferential side wall of the positioning disk is provided with a plurality of disk connection holes arranged at intervals, the pin hole on the hole side wall of the seat through hole is a through hole, and the guide pin can pass through the pin hole from outside to inside and be connected to the pin hole of the positioning disk in an alternative manner.

4. The positioning hinge according to any one of claims 1 to 3, characterized in that: At least two positioning grooves arranged at intervals are arranged on the inner side wall of the positioning plate, and the central angle formed by the positions of the two positioning grooves and the center of the positioning plate is 45°~270°.

5. The positioning hinge according to any one of claims 1 to 3, characterized in that: It comprises at least a pair of the positioning wheels arranged in an axisymmetric manner, the wheel axle is plugged into the pin shaft, and the pair of the positioning wheels are connected to both ends of the wheel axle.

6. The positioning hinge according to any one of claims 1 to 3, characterized in that: A flange is also provided at one end of the pin shaft, the diameter of the flange is larger than the aperture of the seat through hole, at least one fixing screw hole is provided on the flange, and a fixing through hole is provided on the first cross arm or the second cross arm, and a fixing screw can pass through the fixing through hole and be connected to the fixing screw hole of the flange, so that the first cross arm or the second cross arm is fixedly connected to the flange.

7. The positioning hinge according to any one of claims 1 to 3, characterized in that: A buffer mechanism is arranged on the articulated seat and / or the articulated arm.

8. The positioning hinge according to any one of claims 1 to 3, characterized in that: Rolling bearings are respectively arranged at both ends of the seat through hole, and the pin shaft is inserted into the two rolling bearings.

9. The positioning hinge according to claim 8, characterized in that: A gasket is also arranged between the rolling bearing and the first cross arm or the second cross arm.

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