Arm constant force support structure

Abstract

The utility model discloses a kind of arm constant force supporting structures, including connecting seat, swivel head seat, arm main body, support plate and elastic component, arm main body and support plate two ends are respectively connected with swivel head seat and connecting seat upper and lower ends hinged to form parallelogram structure, elastic component includes the elastic element that can elastically extend and retract, first connecting piece and second connecting piece, elastic element one end is connected with arm main body one end hinged, elastic element other end, first connecting piece one end and second connecting piece one end coaxial hinged connection, first connecting piece other end is connected with connecting seat hinged, second connecting piece other end is connected with support plate hinged, the initial elastic force of elastic element can be adjusted, the utility model makes that display height adjustment and the initial elastic force adjustment of elastic piece are more labor-saving, and the elastic force of elastic element can realize the stable support to display, and guarantee that display keeps in stable adjustment position unchanged after adjustment for a long time.

Description

Technical Field

[0001] This utility model relates to a monitor stand, and more particularly to a support structure for constant arm force. Background Technology

[0002] Monitors are used in many places, such as homes, offices, and public places. They are often mounted on monitor stands. Currently, the height and horizontal angle adjustment of monitors are achieved by clamping plastic pads between the arms and relying on friction. These plastic pads are easily worn and damaged during long-term use, resulting in poor stability after the monitor's height and horizontal angle adjustment. It is difficult to maintain stable support and state for a long time. Moreover, the adjustment often requires tightening and loosening screws, which is cumbersome. It is also affected by the friction value, has a small load-bearing range for the monitor, and is complicated to assemble. Summary of the Invention

[0003] To overcome the above-mentioned defects, this utility model provides a constant force support structure for the arm. This constant force support structure can automatically hover after the display height is adjusted, and can adapt to the installation of displays of different weights. After the display height is adjusted, it can maintain a stable state for a long time.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a support structure for constant force of an arm, including a connecting seat, a rotating head seat, an arm body, a support plate, and an elastic component. One end of the arm body and the support plate are respectively hinged to the upper and lower ends of the rotating head seat, and the other end of the arm body and the support plate are respectively hinged to the upper and lower ends of the connecting seat. The connecting seat, the rotating head seat, the arm body, and the support plate together form a parallelogram structure. The elastic component includes an elastic component capable of elastic extension and retraction, a first connecting piece, and a second connecting piece. One end of the elastic component is hinged to one end of the arm body, and the other end of the elastic component, one end of the first connecting piece, and one end of the second connecting piece are coaxially hinged. The other end of the first connecting piece is hinged to the connecting seat, and the other end of the second connecting piece is hinged to the support plate. The initial elastic force of the elastic component can be adjusted.

[0005] As a further improvement of this utility model, the other end of the first connecting piece and the hinge axis of the connecting seat are located between the hinge axis of the arm body and the support plate and the connecting seat, and the connecting seat, the first connecting piece, the second connecting piece and the support plate together form a parallel four-bar structure.

[0006] As a further improvement of this utility model, the elastic component includes a spring, an adjusting rod, and a connecting member. The spring is sleeved on the outside of the adjusting rod. A first radially expanding retaining ring and a second radially expanding retaining ring are respectively provided on the outer circumferential walls of both ends of the adjusting rod along the axial direction. The two ends of the spring are respectively tightly abutted against the first radially expanding retaining ring and the second radially expanding retaining ring. One end of the adjusting rod and the connecting member are connected and can slide relative to each other along the axial direction of the adjusting rod by a set distance. One end of the connecting member forms one end of the elastic component, and the other end of the adjusting rod forms the other end of the elastic component.

[0007] As a further improvement of this utility model, the adjusting rod includes a connecting rod and an adjusting bolt. The connecting rod and the adjusting bolt are movably screwed together to form an integral structure with an adjustable length. A first radially outward-expanding retaining ring is fixedly mounted on the connecting rod, and a second radially outward-expanding retaining ring is fixedly mounted on the neck of the adjusting bolt. The rotating head seat and the connecting piece are respectively provided with a clearance hollow structure facing the head of the adjusting bolt. Hardware tools can be inserted into the flower pattern of the head of the adjusting bolt through the clearance hollow structure to rotate the adjusting bolt.

[0008] As a further improvement of this utility model, a stop plate is also provided, which can be fixedly connected to one end of the spring. The stop plate has a through hole that is directly opposite to the internal channel of the spring. The adjusting bolt passes through the through hole of the stop plate, and the second radially outwardly expanding retaining ring on the stop plate and the adjusting bolt are in close contact.

[0009] As a further improvement of this utility model, the connection structure of one end of the adjusting rod and the connecting member being able to slide relative to each other along the axial direction of the adjusting rod by a set distance is as follows: the other end of the connecting member is provided with an open slide groove extending along its length direction, a sliding block is slidably inserted in the open slide groove, the sliding block is provided with a insertion hole extending along its sliding direction, one end of the adjusting rod is inserted into the insertion hole of the sliding block, and a second radially outwardly expanding retaining ring on the outer circumferential wall of one end of the adjusting rod is tightly attached to the surface of the sliding block.

[0010] As a further improvement of this utility model, the sliding block is a semi-circular shaft structure, the insertion hole is a straight surface perpendicular to the circumferential direction of the semi-circular shaft, and the two ends of the semi-circular shaft are respectively provided with sliding shafts with a reduced diameter. The cross-section of the connector is U-shaped, and the open sliding groove is provided on both sides of the U-shaped structure of the connector. The sliding shafts at both ends of the semi-circular shaft are inserted into the open sliding groove.

[0011] As a further improvement of this utility model, one end of each side wall of the U-shaped structure of the connector is provided with a hinge shaft hole, which is sleeved on the outside of the hinge shaft between one end of the arm body and the rotating head seat.

[0012] As a further improvement of this utility model, a planar bearing is provided between the second radially outwardly expanding retaining ring at one end of the adjusting rod and the sliding block, and the planar bearing is sleeved on the outside of one end of the adjusting rod.

[0013] As a further improvement of this utility model, the other end of the adjusting rod is fixed with a U-shaped hinge plate, one end of the first connecting piece is inserted between the two side walls of the U-shaped hinge plate, one end of each of the two second connecting pieces is flat against the outer surface of the two side walls of the U-shaped hinge plate, and the bottom surface of the U-shaped hinge plate forms a first radially outward expanding stop ring.

[0014] The beneficial effects of this utility model are as follows: This utility model overcomes the monitor's own weight through the elastic force of the elastic component, achieving constant force support for the monitor. After the monitor height is adjusted, it can maintain a stable position for a long time. When adjusting the monitor height, the arm body is moved, the first connecting piece rotates around its hinge axis with the connecting seat, and at the same time, the second connecting piece rotates around its hinge axis with the support plate. The other end of the elastic component moves linearly along a direction that has an angle with its length under the action of the four-bar linkage, thereby reducing the spring compression of the connecting seat from the highest point to the lowest point and increasing the spring force output. After suspending the monitor, a constant force state is achieved. This structure makes adjustment easier, and the elastic force of the elastic component can achieve stable support for the monitor and ensure that the monitor remains in a stable adjusted position for a long time after adjustment. Attached Figure Description

[0015] Figure 1 This is an exploded perspective view of the present invention;

[0016] Figure 2 This is an exploded perspective view of the elastic component of this utility model;

[0017] Figure 3 This is a front view of the arm of this utility model in an upward-tilting position;

[0018] Figure 4 This is a top view of the arm of this utility model in an upward-tilting position;

[0019] Figure 5 for Figure 4 Sectional view along line AA;

[0020] Figure 6 This is a front view of the arm of this utility model in a downward tilting state;

[0021] Figure 7 This is a schematic diagram of the internal structure of the arm of this utility model in a downward tilting state.

[0022] Figure 8 This is a front view of the arm of this utility model in a horizontal position. Detailed Implementation

[0023] Example: A support structure for constant force on an arm includes a connecting seat 1, a rotating head seat 2, an arm body 3, a support plate 4, and an elastic component 5. One end of the arm body 3 and the support plate 4 are respectively hinged to the upper and lower ends of the rotating head seat 2, and the other end of the arm body 3 and the support plate 4 are respectively hinged to the upper and lower ends of the connecting seat 1. The connecting seat 1, the rotating head seat 2, the arm body 3, and the support plate 4 together form a parallelogram structure. The elastic component 5 includes an elastic component capable of elastic extension and retraction, a first connecting piece 6, and a second connecting piece 7. One end of the elastic component is hinged to one end of the arm body 3, and the other end of the elastic component, one end of the first connecting piece 6, and one end of the second connecting piece 7 are coaxially hinged. The other end of the first connecting piece 6 is hinged to the connecting seat 1, and the other end of the second connecting piece 7 is hinged to the support plate 4. The initial elastic force of the elastic component is adjustable. The height of the rotating head seat 2 is adjusted by rotating the arm structure formed by the main body 3 and the support plate 4. Since the monitor is mounted on the rotating head seat 2 through the connecting components, the height of the monitor can also be adjusted. During adjustment, as the arm angle changes, the elastic component 5 changes its length to alter the elastic support force. At the same time, the first connecting piece 6 and the second connecting piece 7 of the elastic component 5 rotate around their hinge axis, causing the other end of the elastic component to move up and down with the arm angle adjustment. The up and down movement of the other end of the elastic component can offset part of its elastic extension and contraction, so that the elastic extension and contraction of the elastic component is small during the arm pitch angle adjustment process, thus maintaining the force balance of the arm. This invention effectively reduces fatigue damage to the elastic component caused by excessive stretching during arm tilting angle adjustment. Because the other end of the elastic component moves up and down synchronously with the arm's swing, the elastic component exhibits minimal elastic variation, preventing sudden increases or decreases in elastic force at extreme positions. Therefore, it effectively improves the problem of the arm drooping or springing upwards when at maximum tilting and downward angles. This allows the head mount 2 and its display to remain stably positioned at any adjustable height. When the display weight changes, simply adjust the initial elastic force of the elastic component 5 to match the display weight.

[0024] The other end of the first connecting piece 6 is hinged to the connecting seat 1 between the arm body 3 and the support plate 4 and the connecting seat 1. The connecting seat 1, the first connecting piece 6, the second connecting piece 7, and the support plate 4 together form a parallel four-bar linkage 11 structure. This structure ensures that the position of the other end of the elastic component always follows the pitch angle change of the support plate 4 and moves in a stable linear motion, thus ensuring stable support for the arm.

[0025] The elastic component includes a spring 8, an adjusting rod, and a connecting member 9. The spring 8 is sleeved on the outside of the adjusting rod. A first radially expanding retaining ring and a second radially expanding retaining ring 10 are respectively provided on the outer circumferential walls of both ends of the adjusting rod along its axial direction. Both ends of the spring 8 are tightly abutted against the first and second radially expanding retaining rings 10. One end of the adjusting rod and the connecting member 9 are connected and can slide relative to each other along the axial direction of the adjusting rod by a set distance. One end of the connecting member 9 forms one end of the elastic component, and the other end of the adjusting rod forms the other end of the elastic component. When adjusting the initial elastic force of this structure, only the length of the adjusting rod needs to be changed to change the compression of the spring 8, thereby changing the initial elastic force of the elastic component.

[0026] The adjusting rod includes a connecting rod 11 and an adjusting bolt 12. The connecting rod 11 and the adjusting bolt 12 are movably screwed together to form an integral structure with an adjustable length. A first radially outward-expanding retaining ring is fixedly mounted on the connecting rod 11, and a second radially outward-expanding retaining ring 10 is fixedly mounted on the neck of the adjusting bolt 12. The rotating head seat 2 and the connecting piece 9 are respectively provided with clearance hollow structures 13 facing the head of the adjusting bolt 12. Hardware tools can be inserted into the head pattern of the adjusting bolt 12 through the clearance hollow structures 13 to rotate the adjusting bolt 12. The length of the adjusting rod can be adjusted by rotating the adjusting bolt 12. During adjustment, the hardware tool is inserted into the head pattern of the adjusting bolt 12 through the clearance hollow structures 13 on the rotating head seat 2 and the connecting piece 9, causing the adjusting bolt 12 to rotate, thereby changing the overall length of the adjusting rod.

[0027] A stop plate 14 is also provided, which can be fixedly connected to one end of the spring 8. The stop plate 14 has a through hole that is directly opposite to the internal channel of the spring 8. The adjusting bolt 12 passes through the through hole of the stop plate 14, and the second radially expanding retaining ring 10 on the stop plate 14 and the adjusting bolt 12 are in close contact. The stop plate 14 can be locked in the coil gap at one end of the spring 8 to achieve a fixed connection with one end of the spring 8, or it can be welded to the coil at one end of the spring 8. When the adjusting bolt 12 rotates, it does not contact the end of the coil of the spring 8, so as to avoid the end of the coil of the spring 8 getting stuck on the second radially expanding retaining ring 10 on the adjusting bolt 12, which would prevent the elastic force of the elastic component from being unable to be adjusted.

[0028] The structure connecting one end of the adjusting rod and the connecting member 9, which allows for relative sliding of a set distance along the axial direction of the adjusting rod, is as follows: The other end of the connecting member 9 has an open groove 15 extending along its length. A sliding block 16 is slidably inserted into the open groove 15. The sliding block 16 has a insertion hole 17 extending along its sliding direction. One end of the adjusting rod is inserted into the insertion hole 17 of the sliding block 16. A second radially expanding retaining ring 10 on the outer circumference of one end of the adjusting rod is tightly attached to the surface of the sliding block 16. In use, the head of the adjusting bolt 12 is inserted into the insertion hole 17 of the sliding block 16, always elastically pressing against the sliding block 16. The sliding block 16 slides within the open groove 15 to adapt to the expansion and contraction of the elastic component. Alternatively, a protrusion can be provided on the adjusting bolt 12, and a long strip groove can be provided on the connecting member 9. The protrusion slides within the long strip groove to adapt to the expansion and contraction of the elastic component.

[0029] The sliding block 16 has a semi-circular shaft structure. The insertion hole 17 is a flat surface perpendicular to the circumferential direction of the semi-circular shaft. Sliding shafts with converging diameters are provided at both ends of the semi-circular shaft. The connector 9 has a U-shaped cross-section, and open grooves 15 are provided on both sides of the U-shaped structure of the connector 9. The sliding shafts at both ends of the semi-circular shaft are inserted into the open grooves 15. The semi-circular shaft structure of the sliding block 16 allows for stable contact between its flat surface and the adjusting bolt 12, while its semi-circular surface can rotate within a certain angle range to accommodate the vertical movement of the other end of the elastic component and the distance difference caused by the expansion and contraction of the elastic component.

[0030] The connector 9 has a hinge shaft hole 18 at one end of each side wall of the U-shaped structure. The hinge shaft hole 18 is sleeved on the outside of the hinge shaft between one end of the arm body 3 and the rotating head seat 2.

[0031] A planar bearing 19 is sandwiched between the second radially expanding retaining ring 10 and the sliding block 16 at one end of the adjusting rod, and the planar bearing 19 is sleeved on the outside of one end of the adjusting rod. The planar bearing 19 can effectively reduce the friction between the second radially expanding retaining ring 10 and the sliding block 16, making it easier to rotate the adjusting bolt 12.

[0032] The other end of the adjusting rod is fixed with a U-shaped hinge plate 20. One end of the first connecting piece 6 is inserted between the two side walls of the U-shaped structure of the hinge plate 20, and one end of each of the two second connecting pieces 7 is flat against the outer surface of the two side walls of the U-shaped structure of the hinge plate 20. The bottom surface of the U-shaped structure of the hinge plate 20 forms a first radially outward expanding stop ring.

Claims

1. A constant-force support structure for an arm, comprising a connecting seat (1), a rotating head seat (2), an arm body (3), a support plate (4), and an elastic component (5), wherein one end of the arm body and the support plate are respectively hinged to the upper and lower ends of the rotating head seat, and the other end of the arm body and the support plate are respectively hinged to the upper and lower ends of the connecting seat, wherein the connecting seat, the rotating head seat, the arm body, and the support plate together form a parallelogram structure, characterized in that: The elastic component includes an elastic component capable of elastic extension and retraction, a first connecting piece (6), and a second connecting piece (7). One end of the elastic component is hinged to one end of the arm body, and the other end of the elastic component, one end of the first connecting piece, and one end of the second connecting piece are coaxially hinged together. The other end of the first connecting piece is hinged to the connecting seat, and the other end of the second connecting piece is hinged to the support plate. The initial elastic force of the elastic component can be adjusted.

2. The arm constant force support structure according to claim 1, characterized in that: The other end of the first connecting piece is located between the hinge axis of the connecting seat and the arm body and the hinge axis of the support plate and the connecting seat. The connecting seat, the first connecting piece, the second connecting piece and the support plate together form a parallel four-bar structure.

3. The arm constant force support structure according to claim 2, characterized in that: The elastic component includes a spring (8), an adjusting rod, and a connector (9). The spring is sleeved on the outside of the adjusting rod. The outer circumferential walls at both ends of the adjusting rod are respectively provided with a first radially expanding retaining ring and a second radially expanding retaining ring (10). The two ends of the spring are respectively tightly abutted against the first radially expanding retaining ring and the second radially expanding retaining ring. One end of the adjusting rod and the connector can slide relative to each other along the axial direction of the adjusting rod by a set distance. One end of the connector forms one end of the elastic component, and the other end of the adjusting rod forms the other end of the elastic component.

4. The arm constant force support structure according to claim 3, characterized in that: The adjusting rod includes a connecting rod (11) and an adjusting bolt (12). The connecting rod and the adjusting bolt are movably screwed together to form an integral structure with an adjustable length. A first radially outward-expanding retaining ring is fixed on the connecting rod, and a second radially outward-expanding retaining ring is fixed on the neck of the adjusting bolt. The rotating head seat and the connecting piece are respectively provided with a clearance hollow structure (13) that faces the head of the adjusting bolt. Hardware tools can be inserted into the head flower pattern of the adjusting bolt through the clearance hollow structure to rotate the adjusting bolt.

5. The arm constant force support structure according to claim 4, characterized in that: It is also provided with a stop plate (14), which can be fixedly connected to one end of the spring. The stop plate has a through hole that is directly opposite to the internal channel of the spring. The adjusting bolt passes through the through hole of the stop plate, and the second radially outwardly expanding retaining ring on the stop plate and the adjusting bolt are in close contact.

6. The arm constant force support structure according to claim 4, characterized in that: The structure connecting one end of the adjusting rod and the connecting member, which can slide relative to each other along the axial direction of the adjusting rod, is as follows: the other end of the connecting member is provided with an open slide groove (15) extending along its length direction, a sliding block (16) is slidably inserted in the open slide groove, and the sliding block is provided with a insertion hole (17) extending along its sliding direction. One end of the adjusting rod is inserted into the insertion hole of the sliding block, and the second radially outwardly expanding retaining ring on the outer circumferential wall of one end of the adjusting rod is tightly attached to the surface of the sliding block.

7. The arm constant force support structure according to claim 6, characterized in that: The sliding block is a semi-circular shaft structure. The insertion hole is a straight surface perpendicular to the circumferential direction of the semi-circular shaft. The two ends of the semi-circular shaft are respectively provided with sliding shafts with a reduced diameter. The cross-section of the connector is U-shaped. Opening grooves are provided on both sides of the U-shaped structure of the connector. The sliding shafts at both ends of the semi-circular shaft are inserted into the open grooves.

8. The arm constant force support structure according to claim 7, characterized in that: The connector U-shaped structure has a hinge shaft hole (18) at one end of each side wall. The hinge shaft hole is sleeved on the outside of the hinge shaft between one end of the arm body and the rotating head seat.

9. The arm constant force support structure according to claim 6, characterized in that: A planar bearing (19) is sandwiched between the second radially outwardly expanding retaining ring at one end of the adjusting rod and the sliding block, and the planar bearing is sleeved on the outside of one end of the adjusting rod.

10. The arm constant force support structure according to claim 3, characterized in that: The other end of the adjusting rod is fixed with a U-shaped hinge plate (20). One end of the first connecting piece is inserted between the two side walls of the U-shaped hinge plate, and one end of each of the two second connecting pieces is flat against the outer surface of the two side walls of the U-shaped hinge plate. The bottom surface of the U-shaped hinge plate forms a first radially outward expanding stop ring.

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