CN214467449U

CN214467449U - Display support arm

Info

Publication number: CN214467449U
Application number: CN202023225767.4U
Authority: CN
Inventors: 罗成一
Original assignee: Fujian Jiuzhao Intelligent Technology Co ltd; SHANGHAI THINKWISE INDUSTRIAL CO LTD
Current assignee: Fujian Jiuzhao Intelligent Technology Co ltd; Shanghai Xinhuixiang Technology Co.,Ltd.
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-10-22
Anticipated expiration: 2030-12-28
Also published as: WO2022142197A1

Abstract

The utility model relates to a display support 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, and the first end of the spring assembly is movably connected with the upper arm; wherein: the spring component is characterized by also comprising a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged on the first seat body, and the other end of the first connecting rod is hinged with the second end of the spring component; the second connecting rod is hinged to the lower arm, the other end of the second connecting rod is hinged to a hinged point of the first connecting rod and the spring assembly, and an included angle between the first connecting rod and a connecting line of the spring assembly is changed through the second connecting rod. The utility model discloses ingeniously the design of the sharp pretension of spring unit changes into the scheme that can follow the support arm height from top to bottom and adjust and change, offsets spring unit's stroke difference, also reduces the length change of spring promptly, maintains the relatively invariable of spring force, improves the support arm and adjusts to the highest and when minimum limit point, flagging or the defect of bounce-back.

Description

Display support arm

The technical field is as follows:

the utility model relates to a display 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 spring unit in support arm adjustment process, the scheme that has the spring effort of relatively invariable becomes the utility model discloses the object of 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 the display support arm of adjusting the stroke difference from top to bottom.

The utility model discloses technical scheme realizes like this: a display support 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; the method is characterized in that: the spring component is characterized by also comprising a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged on the first seat body, and the other end of the first connecting rod is hinged with the second end of the spring component; the second connecting rod is hinged to the lower arm, the other end of the second connecting rod is hinged to a hinged point of the first connecting rod and the spring assembly, and an included angle between the first connecting rod and a connecting line of the spring assembly is changed through the second connecting rod.

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 with the end parts of the first connecting rod and the second connecting rod at the same time; the head of the screw is abutted against the baffle plate arranged on the inner side of the upper arm through a end face bearing to form movable connection, and the upper arm corresponding to the extension line of the screw is provided with an insertion hole of a screw tool.

One end of the first connecting rod and one end of the second connecting rod are both of V-shaped structures and can be clamped on two sides of a shaft lug of the spring rear seat.

The first seat body is also provided with an arc-shaped groove which takes the upper arm hinged hinge shaft as the center of a circle, a bolt is penetrated in the arc-shaped groove, damping cushion blocks are respectively arranged at the two ends of the bolt in a cushioning manner, and damping is formed by means of the contact surface of the damping cushion blocks and the arc-shaped groove; the upper arm is provided with an embedding groove corresponding to the position of the damping cushion block, the convex damping cushion block is accommodated by the embedding groove, and the damping cushion block is driven to synchronously swing.

Flaring sinking grooves are further formed in two end faces of the arc-shaped groove in the first seat body, the flaring sinking grooves can be used for containing the local part of the damping cushion block, and the convex local part of the damping cushion block enters the caulking groove of the upper arm.

An arc gasket is further arranged in the flaring sinking groove of the arc groove, and the end face of the damping cushion block directly abuts against the arc gasket.

One side of the damping cushion block is processed with a bolt counter bore, and the other side is provided with an arc tenon which is embedded into an arc groove of the first seat body.

The utility model changes the linear pre-tightening design of the spring assembly into a scheme which can change along with the up-down height adjustment of the support arm, offsets the stroke difference of the spring assembly, namely reduces the length change of the spring, maintains the relative constancy of the spring force, and improves the defect of droop or rebound when the support arm is adjusted to the highest and lowest limit points; and a damping structure is additionally arranged between the upper arm and the first seat body, so that the spring force of a harmful part and the spring force which is not enough to compensate can be offset, and the use experience is improved.

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 a display arm

FIG. 2 is a cross-sectional view of a support arm of the high-position display

FIG. 3 is a cross-sectional view of a support arm of a display in a horizontal state

FIG. 4 is a cross-sectional view of a support arm of a low position display

FIG. 5 is a schematic view of the display arm assembly

FIG. 6 is an exploded view of the display arm

Wherein

1-upper arm 11-decorative cover 12-baffle 13-intervention hole

14-caulking groove 2-lower arm 3-first seat body 31-arc groove

311-flaring sinking groove 312-arc gasket 4-second seat body 5-spring assembly

51-first end 52-second end 53-spring 54-spring backseat

55-nut seat 56-screw 561-screw head 57-end face bearing

6-first connecting rod 7-second connecting rod 8-hinge shaft 9-bolt

91-damping cushion block 911-bolt counter bore 912-arc tenon

The specific implementation mode is as follows:

referring to fig. 1 to 6, the display 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. Upper arm 1, underarm 2, second pedestal 3 and second pedestal 4 articulate into four-bar linkage through hinge 8, and form a spring chamber that can holding spring assembly 5 by upper arm 1 and the inclusion of underarm 2, enclose spring assembly 5 including, form complete product form. The illustrated upper arm 1 has a downward full-wrap structure, and also houses the lower arm 2 together, while leaving the fitting hole of the hinge shaft 8, etc., covered by a cosmetic cover 11, keeping the appearance neat.

The spring assembly 5 has a first end 51 and a second end 52, the first end 51 forms a movable connection with the upper arm 1, the second end 52 is hinged with one end of the first connecting rod 6, and the other end of the first connecting rod 6 is hinged on the first seat 3; that is, the spring assembly 5 is hinged to the first seat 3 via the first link 6.

The second connecting rod 7 is hinged on the lower arm 2, the other end of the second connecting rod is hinged with the hinged point of the first connecting rod 6 and the spring assembly 5, the included angle of the connecting line of the first connecting rod 6 and the spring assembly 5 is changed through the second connecting rod 7, so that the stroke difference formed in the up-and-down adjusting process of the support arm is offset, and the relative constancy of the spring force of the spring assembly 5 in the adjusting process is kept.

The spring assembly 5 comprises 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, a threaded section of the screw 56 is screwed on the nut seat 55, and a screw head 561 and the spring rear seat 54 form a first end and a second end of the spring assembly.

The spring rear seat 54 is processed with a shaft lug, and is hinged with the end parts of the first connecting rod 6 and the second connecting rod 7 by virtue of the shaft lug; more specifically, one end of the first connecting rod 6 and one end of the second connecting rod 7 are both in a V-shaped structure and can be clamped on two sides of a shaft lug of the spring rear seat, and symmetrical balanced stress can be formed.

The head 561 of the screw abuts against the baffle 12 arranged on the inner side of the upper arm 1 through a end face bearing 57 to form a movable connection, and the upper arm 1 corresponding to the extension line of the screw is provided with an intervention hole 13 of a screw tool, so that the pre-tightening spring force of the spring assembly 5 can be conveniently adjusted at any time.

Further, the first seat body 3 is further provided with an arc-shaped groove 31 taking the upper arm hinge shaft 8 as a circle center, a bolt 9 penetrates through the arc-shaped groove 31, two ends of the bolt 9 are respectively provided with a damping cushion block 91 in a cushioning manner, and damping is formed by means of the contact surface between the damping cushion block 91 and the arc-shaped groove 31; the upper arm 1 is provided with a caulking groove 14 corresponding to the position of the damping cushion block 91, and the caulking groove 14 is used for accommodating the convex damping cushion block 91 and driving the damping cushion block 91 to swing synchronously. The damping force generated by the damping cushion block 91 and the arc-shaped groove 31 during the swinging process of the upper arm 1 can further counteract or compensate the excessive spring force or the insufficient spring force generated by the spring assembly 5 at the extreme position of the arm, as shown in fig. 2, 3 and 4.

As shown in fig. 6, further, the two end faces of the arc-shaped slot 31 on the first seat body are further provided with flared sinking slots 311, by means of the flared sinking slots 311, the part of the damping cushion 91 can be accommodated, and the protruded part of the damping cushion 91 enters the caulking slot 14 of the upper arm and can be driven by the upper arm 1 to move within the range of the arc-shaped slot 31.

An arc gasket 312 is also arranged in the flaring sinking groove 311 of the arc groove, and the end surface of the damping cushion block 91 directly props against the arc gasket 312, so that the damping is increased, and the abrasion of other parts is reduced.

One side of damping cushion block 91 is processed and is had bolt counter bore 911, the another side is provided with arc tenon 912, imbeds in the arc groove 31 of first pedestal with the help of arc tenon 912, can avoid damping cushion block 91 rotatory, also can increase the friction area.

Claims

1. A display support 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; the method is characterized in that: the spring component is characterized by also comprising a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is hinged on the first seat body, and the other end of the first connecting rod is hinged with the second end of the spring component; the second connecting rod is hinged to the lower arm, the other end of the second connecting rod is hinged to a hinged point of the first connecting rod and the spring assembly, and an included angle between the first connecting rod and a connecting line of the spring assembly is changed through the second connecting rod.

2. A monitor 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. A monitor support arm according to claim 1 or 2, wherein: the spring rear seat is provided with a shaft lug which is hinged with the end parts of the first connecting rod and the second connecting rod at the same time; the head of the screw is abutted against the baffle plate arranged on the inner side of the upper arm through a end face bearing to form movable connection, and the upper arm corresponding to the extension line of the screw is provided with an insertion hole of a screw tool.

4. A monitor arm according to claim 3, wherein: one end of the first connecting rod and one end of the second connecting rod are both of V-shaped structures and can be clamped on two sides of a shaft lug of the spring rear seat.

5. A monitor arm according to claim 1, wherein: the first seat body is also provided with an arc-shaped groove which takes the upper arm hinged hinge shaft as the center of a circle, a bolt is penetrated in the arc-shaped groove, damping cushion blocks are respectively arranged at the two ends of the bolt in a cushioning manner, and damping is formed by the aid of the contact surfaces of the damping cushion blocks and the arc-shaped groove; the upper arm is provided with an embedding groove corresponding to the position of the damping cushion block, the convex damping cushion block is accommodated by the embedding groove, and the damping cushion block is driven to synchronously swing.

6. A monitor arm according to claim 5, wherein: flaring sinking grooves are further formed in two end faces of the arc-shaped groove in the first seat body, the flaring sinking grooves can be used for containing the local part of the damping cushion block, and the convex local part of the damping cushion block enters the caulking groove of the upper arm.

7. A monitor arm according to claim 6, wherein: an arc gasket is also arranged in the flaring sinking groove of the arc groove, and the end surface of the damping cushion block directly abuts against the arc gasket.

8. A monitor support arm according to claim 5, 6 or 7, wherein: one side of the damping cushion block is processed with a bolt counter bore, and the other side is provided with an arc tenon which is embedded into an arc groove of the first seat body.