CN212056489U - Adjustable support arm - Google Patents
Adjustable support arm Download PDFInfo
- Publication number
- CN212056489U CN212056489U CN202020382043.1U CN202020382043U CN212056489U CN 212056489 U CN212056489 U CN 212056489U CN 202020382043 U CN202020382043 U CN 202020382043U CN 212056489 U CN212056489 U CN 212056489U
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- connecting rod
- hinged
- seat body
- spring assembly
- arm
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Abstract
The utility model relates to an adjustable supporting arm, which comprises an upper arm, a lower arm, a first seat body, a second seat body and a spring assembly; the upper arm, the lower arm, the second seat body and the second seat body are hinged to form a four-bar linkage structure, a spring assembly arranged between the upper arm and the lower arm is provided with a first end and a second end, and the first end is movably connected with the upper arm or the lower arm; wherein: the folding chair is characterized by also comprising a first connecting rod and a second connecting rod, wherein one end part of the first connecting rod is hinged on the upper arm or the lower arm, one end of the second connecting rod is hinged on the first seat body or the second seat body, and the other end of the second connecting rod is hinged on the first connecting rod, so that a small four-bar structure is formed; the second end of the spring assembly is hinged on the first connecting rod, the hinge point is adjusted along with the height of the supporting arm, the stroke difference value of the spring assembly is reduced, the spring force is kept relatively constant, the supporting arm does not droop when adjusted to the highest point, and does not rebound when adjusted to the lowest point, and the requirement of daily work is met.
Description
The technical field is as follows:
the utility model relates to an adjustable support arm, especially when the support arm is adjusted to high low extreme position, built-in spring mechanism has and is close invariable effort.
Background art:
the adjustable support of the display is widely used in the industrial and civil fields for a long time, and provides more humanized operation and observation angles for people. The structure of the suspension arm is mostly a parallel four-bar mechanism, the suspension angle is maintained by means of spring force, the spring force is adjusted by the spring force of the moment required by the suspension horizontal position in design, when the suspension arm is adjusted to the pitching extreme position, the spring force is increased steeply due to the stretching of the spring, the suspension arm is often adjusted to the highest point and sags downwards, and the suspension arm rebounds upwards when adjusted to the lowest point. The following improvements are made for this industry:
for example, patent application No. CN2014108381463 discloses a spring support arm named as a display support, which comprises a support arm body and a spring assembly; the support arm body comprises an upper cover, a lower cover, an upper shaft seat, a lower shaft seat and a spring assembly, and the upper cover, the lower cover, the upper shaft seat and the lower shaft seat are hinged to form a four-bar linkage; the spring assembly is arranged between the upper cover and the lower cover, one end of the spring assembly is abutted against the cam surface of the lower shaft seat by virtue of the pulley, and the other end of the spring assembly is adjusted by virtue of the bevel gear pair to realize the adjustment of the abutting force. The spring assembly is abutted against the cam surface by one end to shorten the stroke difference of the spring assembly when the support arm is adjusted from the horizontal position to the pitching extreme position, namely the length change value of a spring in the spring assembly is reduced as much as possible, but the cam radius difference is still limited, only the improvement effect is achieved, and the defects in the structure in the prior art are difficult to completely overcome.
How to provide the spring unit in the support arm adjustment process, the scheme that has the spring effort of relatively invariable becomes the object of the utility model discloses the research.
The invention content is as follows:
the utility model aims at designing a spring unit one end passes through the connecting rod transition, reduces stroke difference's adjustable support arm.
The utility model discloses technical scheme realizes like this: an adjustable supporting arm comprises an upper arm, a lower arm, a first seat body, a second seat body and a spring assembly; the upper arm, the lower arm, the second seat body and the second seat body are hinged into a four-bar linkage structure, and the upper arm and the lower arm are included to form a spring cavity capable of containing a spring assembly; the spring assembly is provided with a first end and a second end, and the first end is movably connected with the upper arm or the lower arm; the method is characterized in that: the folding seat is characterized by further comprising a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged to the upper arm or the lower arm, one end of the second connecting rod is hinged to the first seat body or the second seat body, the other end of the second connecting rod is hinged to the first connecting rod, and a small four-connecting-rod structure is formed by the second connecting rod, the upper arm or the lower arm and the first seat body or the second seat body; the second end of the spring assembly is hinged to the first link.
The spring assembly comprises a spring, a spring rear seat, a nut seat and a screw rod; the nut seat and the spring rear seat are correspondingly fixed at two end parts of the spring, the thread section of the screw rod is screwed on the nut seat, and the head part of the screw rod and the spring rear seat form a first end and a second end of the spring assembly.
The spring rear seat is provided with a shaft lug which is hinged on the first connecting rod; the head of the screw rod penetrates through the upper arm or the lower arm through a hinge shaft to form movable connection.
The middle part of the hinge shaft is provided with a through hole which is vertical to the axial direction, the screw rod penetrates through the through hole, and an end face bearing is arranged between the head part of the screw rod and the hinge shaft.
The first connecting rod is of an adhered double-piece structure and can be clamped on the shaft lug of the spring rear seat and two sides of the sheet second connecting rod.
The first end of the spring assembly is movably connected to the upper arm close to the first seat body end and has one of the following four structures: one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod.
The first end of the spring assembly is movably connected to the upper arm close to the second seat body end and has one of the following four structures: one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod.
The utility model discloses utilize a little four-bar linkage structure ingeniously, come the second end of articulated spring unit for the support arm is raised or is flagging, keeps being equivalent with the stroke of horizontality, also reduces the length change of spring, maintains the relatively invariable of spring force, realizes that the support arm is not flagging when adjusting to the peak, and does not rebound when adjusting to the minimum yet, satisfies the needs of daily work.
Description of the drawings:
the present invention will be further explained with reference to the following specific drawings:
FIG. 1 is a schematic view of an adjustable support arm
FIG. 2 is a schematic cross-sectional view of the horizontal adjustable support arm
FIG. 3 is a schematic sectional view of the adjustable support arm in the high position
FIG. 4 is a schematic cross-sectional view of the low position adjustable support arm
FIG. 5 is a schematic bottom view of the first base in a horizontal state
FIG. 6 is a schematic bottom view of the first seat body in the high position
FIG. 7 is a schematic bottom view of the first seat in a low position
FIG. 8 is an exploded view of the adjustable support arm
FIG. 9 is an exploded view of the spring assembly
FIG. 10A is a schematic diagram of the relationship between the first base and the spring assembly
FIG. 10B is a schematic diagram of the relationship between the first base and the spring assembly
FIG. 10C is a schematic diagram of the relationship between the first base and the spring assembly
FIG. 10D is a diagram illustrating the relationship between the first base and the spring assembly
FIG. 11A is a schematic view of the relationship between the second seat and the spring assembly
FIG. 11B is a schematic diagram of the relationship between the second base and the spring assembly
FIG. 11C is a schematic diagram of the relationship between the second base and the spring assembly
FIG. 11D is a diagram illustrating the relationship between the second seat and the spring assembly
Wherein
1-upper arm 2-lower arm 3-first seat 4-second seat
5-spring Assembly 51-first end 52-second end 53-spring
54-spring rear seat 55-nut seat 56-screw 561-screw head
57-hinge 58-end face bearing 6-first connecting rod 7-second connecting rod
The specific implementation mode is as follows:
referring to fig. 1 to 9, the adjustable support arm includes an upper arm 1, a lower arm 2, a first seat 3, a second seat 4, a spring assembly 5, a first link 6 and a second link 7; the upper arm 1, the lower arm 2, the second seat 3 and the second seat 4 are hinged into a four-bar structure, preferably a parallel four-bar structure. As the supporting arm used for the display support, the upper arm 1 and the lower arm 2 generally adopt workpieces with U-shaped sections, the workpieces are nested with each other and are included to form a spring cavity capable of accommodating the spring assembly 5, and the spring assembly 5 is wrapped in the spring cavity; the spring assembly 5 has a first end 51 and a second end 52, the first end 51 is preferably movably connected with the upper arm 1 to facilitate the adjustment operation of the spring preload.
Referring to fig. 2, 3, 4 and 8, in this example, one end of the first link 6 is hinged to the lower arm 2, one end of the second link 7 is hinged to the first seat 3, and the other end is hinged to the first link 6, specifically to the end of the first link 6, forming a small four-bar linkage structure with a part of the lower arm 2 and a part of the first seat 3, and the second end 52 of the spring assembly is hinged to the middle of the first link 6, so as to adjust the stroke of the spring assembly 5 to follow the change of the supporting arm.
As shown in fig. 8 and 9, the spring assembly 5 includes a spring 53, a spring rear seat 54, a nut seat 55 and a screw 56; the nut seat 55 and the spring rear seat 54 are correspondingly fixed at two ends of the spring 53, the threaded section of the screw 56 is screwed on the nut seat 55, and the screw head 561 and the spring rear seat 54 form the first end 51 and the second end 52 of the spring assembly. More specifically, the spring rear seat 54 is provided with a lug by means of which it is hinged on the first connecting rod 6; the screw head 561 is movably connected to the lower arm 2 by a hinge 57, and the spring assembly 5 is positioned by the hinge 57 to allow it to swing up and down. That is, the hinge shaft 57 has a through hole perpendicular to the axial direction in the middle, the screw 56 passes through the through hole, and the end face bearing 58 is provided between the screw head 561 and the hinge shaft 57, so that the adjustment operation is easier.
The first connecting rod 6 is of an adhered double-piece structure and can be clamped on the shaft lug of the spring rear seat 54 and two sides of the second connecting rod 7, so that the space is saved and the assembly is convenient.
In the four-bar linkage structure that has the function of hovering in optional position, the pretightning force that its spring unit produced only need act on adjacent two edges can, for this reason on the basis of above-mentioned example, still can have following combination:
referring to fig. 10A to 10D, the first end 51 of the spring assembly is movably connected to the end of the upper arm 1 close to the second seat 4, and has one of the following four structures:
one end of a first connecting rod 6 is hinged on the lower arm 2, one end of a second connecting rod 7 is hinged on the first seat body 3, the other end of the second connecting rod is hinged with the end part of the first connecting rod 6, and a second end 52 of a spring assembly is hinged in the middle of the first connecting rod 6;
one end of a first connecting rod 6 is hinged on the lower arm 2, one end of a second connecting rod 7 is hinged on the first seat body 3, the other end of the second connecting rod is hinged in the middle of the first connecting rod 6, and a second end 52 of the spring assembly is hinged at the end part of the first connecting rod 6;
one end of the first connecting rod 6 is hinged on the upper arm 1, one end of the second connecting rod 7 is hinged on the first seat body 3, the other end of the second connecting rod is hinged with the end part of the first connecting rod 6, and the second end 52 of the spring component is hinged in the middle of the first connecting rod 6;
one end of the first connecting rod 6 is hinged on the upper arm 1, one end of the second connecting rod 7 is hinged on the first seat body 3, the other end is hinged in the middle of the first connecting rod 6, and the second end 52 of the spring component is hinged on the end part of the first connecting rod 6.
Referring to fig. 11A to 11D, the first end 51 of the spring assembly is movably connected to the end of the upper arm 1 close to the first seat 3, and has one of the following four structures:
one end of a first connecting rod 6 is hinged on the lower arm 2, one end of a second connecting rod 7 is hinged on the second seat body 4, the other end of the second connecting rod is hinged with the end part of the first connecting rod 6, and a second end 52 of a spring assembly is hinged in the middle of the first connecting rod 6;
one end of a first connecting rod 6 is hinged on the lower arm 2, one end of a second connecting rod 7 is hinged on the second seat body 4, the other end of the second connecting rod is hinged in the middle of the first connecting rod 6, and a second end 52 of the spring assembly is hinged on the end part of the first connecting rod 6;
one end of the first connecting rod 6 is hinged on the upper arm 1, one end of the second connecting rod 7 is hinged on the second seat body 4, the other end of the second connecting rod is hinged with the end part of the first connecting rod 6, and the second end 52 of the spring component is hinged in the middle of the first connecting rod 6;
one end of the first connecting rod 6 is hinged on the upper arm 1, one end of the second connecting rod 7 is hinged on the second seat body 4, the other end is hinged in the middle of the first connecting rod 6, and the second end 52 of the spring component is hinged on the end part of the first connecting rod 6.
When the first end 51 of the spring assembly is movably connected to the upper arm 1 and used as a display bracket, the optimal scheme is that the screw head 561 of the spring assembly faces the upper half part, so that the adjustment operation is convenient; however, it is also difficult to avoid the use of the high-level cantilever, and the adjustment of the screw 56 is possible from bottom to top, that is, the first end 51 of the spring assembly is disposed on the lower arm 2, and the same eight structural relationships as above are not necessarily listed.
Claims (7)
1. An adjustable supporting arm comprises an upper arm, a lower arm, a first seat body, a second seat body and a spring assembly; the upper arm, the lower arm, the second seat body and the second seat body are hinged into a four-bar linkage structure, and the upper arm and the lower arm are included to form a spring cavity capable of containing a spring assembly; the spring assembly is provided with a first end and a second end, and the first end is movably connected with the upper arm or the lower arm; the method is characterized in that: the folding seat is characterized by further comprising a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged to the upper arm or the lower arm, one end of the second connecting rod is hinged to the first seat body or the second seat body, the other end of the second connecting rod is hinged to the first connecting rod, and a small four-connecting-rod structure is formed by the second connecting rod, the upper arm or the lower arm and the first seat body or the second seat body; the second end of the spring assembly is hinged to the first link.
2. An adjustable support arm according to claim 1, wherein: the spring assembly comprises a spring, a spring rear seat, a nut seat and a screw rod; the nut seat and the spring rear seat are correspondingly fixed at two end parts of the spring, the thread section of the screw rod is screwed on the nut seat, and the head part of the screw rod and the spring rear seat form a first end and a second end of the spring assembly.
3. An adjustable support arm according to claim 1 or 2, wherein: the spring rear seat is provided with a shaft lug which is hinged on the first connecting rod; the head of the screw rod penetrates through the upper arm or the lower arm through a hinge shaft to form movable connection.
4. An adjustable support arm according to claim 3, wherein: the middle part of the hinge shaft is provided with a through hole which is vertical to the axial direction, the screw rod passes through the through hole, and an end surface bearing is arranged between the head part of the screw rod and the hinge shaft.
5. An adjustable support arm according to claim 3, wherein: the first connecting rod is of an adhered double-piece structure and can be clamped on the shaft lug of the spring rear seat and two sides of the second connecting rod.
6. An adjustable support arm according to claim 1, wherein: the first end of the spring assembly is movably connected with the upper arm close to the first seat body end and has one of the following four structures: one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the second seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod.
7. An adjustable support arm according to claim 1, wherein: the first end of the spring component is movably connected with the upper arm close to the second seat body end and has one of the following four structures: one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of a first connecting rod is hinged to the lower arm, one end of a second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the end portion of the first connecting rod, and the second end of the spring assembly is hinged to the middle of the first connecting rod; one end of the first connecting rod is hinged to the upper arm, one end of the second connecting rod is hinged to the first seat body, the other end of the second connecting rod is hinged to the middle of the first connecting rod, and the second end of the spring assembly is hinged to the end of the first connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020382043.1U CN212056489U (en) | 2020-03-24 | 2020-03-24 | Adjustable support arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020382043.1U CN212056489U (en) | 2020-03-24 | 2020-03-24 | Adjustable support arm |
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| Publication Number | Publication Date |
|---|---|
| CN212056489U true CN212056489U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020382043.1U Active CN212056489U (en) | 2020-03-24 | 2020-03-24 | Adjustable support arm |
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| CN (1) | CN212056489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142197A1 (en) * | 2020-12-28 | 2022-07-07 | 上海慧想办公用品有限公司 | Display support arm |
-
2020
- 2020-03-24 CN CN202020382043.1U patent/CN212056489U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142197A1 (en) * | 2020-12-28 | 2022-07-07 | 上海慧想办公用品有限公司 | Display support arm |
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