CN2566418Y - Link type lifting device - Google Patents

Abstract

A link type lifting device, comprising: a base, a connecting seat, a first pivot unit, a first link unit, an elastic unit, a second link unit, and a second pivot unit. The first and second pivoting parts are respectively pivotally connected to the two ends of the first and second link units to form a set of four-bar linkages. Among them, the first pivot unit is fixedly connected to the connecting seat and the base in sequence, and is placed on a supporting surface; while the second pivot unit is pivotally connected to an object such as a liquid crystal display; at the same time, it is connected to the middle section of the first and second link units An elastic unit for labor-saving adjustment of the position of the LCD screen.

Description

Link type lifting device

(1) Technical field

The utility model relates to a connecting rod type lifting device, in particular to a connecting rod type lifting device which arranges an elastic unit in the middle section of the connecting rod and is used for a liquid crystal display.

(2) Background technology

As shown in FIG. 1 , in the conventional link-type supporting device 9 of a liquid crystal display, a bracket 91 is provided on a bottom frame 90 , and a first pivot plate 92 is fixed on the bracket 91 . Then, two torsion springs 94 are threaded through the two pivot shafts 93 , and one ends 96 of the two connecting rod groups 95 are respectively pivotally connected to the first pivot plate 92 . The other ends 97 of the two connecting rod groups 95 are respectively pivotally connected to a second pivot plate 98, and the second pivot plate 98 is pivotally connected to a fixed frame 99, and the fixed frame 99 is used to fix a liquid crystal display (not shown). .

By turning the fixing frame 99, the pitch angle of the liquid crystal display can be adjusted, and by pressing down or lifting the connecting rod group 95, the front, rear, up and down positions of the liquid crystal display can be adjusted.

Referring to Fig. 1, 2, because the weight W of liquid crystal display is on the point of action 97 of connecting rod group 95, the distance D between the fulcrum 96 (the other end 96 of connecting rod group 95) is quite large, that is, the moment arm D is quite large, Therefore, the torque generated by W×D is also quite large. Therefore, the elastic recovery torque M provided by the torsion spring 94 used to support the weight of the liquid crystal display also needs to be quite large, so the torsion spring 94 must have a larger wire diameter or more turns to be able to bear it. However, the torsion spring with large wire diameter and multiple turns not only increases the material cost, but also the space at the end of the connecting rod group is narrow, which makes it difficult to assemble the torsion spring with large wire diameter and multiple turns.

In addition, in the structure where the spring is installed in the connecting rod group, only torsion springs can be used, and it is difficult to install compression or tension coil springs, and the degree of freedom in design is low.

Moreover, the torsion spring 94 needs to pass through the pivot 93 as a support, so as to prevent the torsion spring from being distorted and deformed so as to lose its spring function. However, the pivot 93 is pierced with the torsion spring 94 and causes friction between the two components during use. The light one produces harsh noises, and the severe one makes the force only limited to a part of the torsion spring, which cannot be evenly distributed over the entire length, resulting in The deformation of this section exceeds the elastic deformation range and destroys it.

In addition, the supporting pivots not only cause inconvenience in assembly, but also increase material cost.

(3) Contents of utility model

Therefore, an object of the present invention is to provide a link type lifting device, the elastic unit of which is easy to assemble.

Another object of the present utility model is to provide a link type lifting device, the type of elastic unit used in it has a high degree of freedom of choice.

Another object of the present invention is to provide a link-type lifting device, the elastic unit of which will not generate friction noise.

Another object of the present invention is to provide a link-type lifting device, the external force on which can be evenly distributed on the whole elastic unit without causing local damage.

Another object of the present utility model is to provide a link type lifting device with low assembly and material costs.

The link type lifting device for connecting a display relative to a support surface of the present utility model includes: a first link unit, a second link unit, a first pivot unit, a second pivot unit unit, and an elastic unit; the first link unit has two parallel first rods; the second link unit is adjacent to the first link unit up and down, and the second link unit has two parallel first rods Two rods; the first pivot unit has a connecting plate and a pair of first pivoting plates extending from opposite ends of the connecting plate and facing each other, the connecting plate is connected to the support surface, the first rod and the second One end of the rod body is respectively pivotally connected to the corresponding first pivot plate; the second pivot unit has two opposite second pivot plates, which are respectively pivotally connected to the other end of the first rod body and the second rod body The other end of the display screen; the elastic unit is connected between the first link unit and the middle section of the second link unit; when the display screen is moved to a lower position relative to the support surface, the elastic unit stores elasticity Potential energy is used to assist the energy required for the display screen to rise relative to the supporting surface.

In order to further illustrate the purpose, structural features and effects of the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings.

(4) Description of drawings

Fig. 1 is the three-dimensional assembly diagram of conventional link type support device;

Fig. 2 is a schematic diagram of the force analysis of the connecting rod when the conventional device and the utility model device are in the first and second positions;

Fig. 3 is a three-dimensional exploded view of the first preferred embodiment of the connecting rod type lifting device of the present invention;

Fig. 4 is a combined side view of the coil spring elastic unit of the present invention, wherein the base and connecting parts are not shown, the solid line represents the first raised position, and the dotted line represents the lowered second position;

Fig. 5 is the front view of Fig. 4;

Figure 6 is a combined side view of the utility model with a torsion spring elastic unit, wherein the base is not shown;

Fig. 7 is the front view of Fig. 6;

Fig. 8 is the second preferred embodiment of the torsion spring elastic unit of the present utility model;

Fig. 9 is a combined side view of the third preferred embodiment of the elastic unit with the torsion spring of the present invention, wherein the base is not shown;

Figure 10 is a front view of Figure 9;

Fig. 11 is a combined side view of the fourth preferred embodiment of the elastic unit with the torsion spring of the present invention, wherein the base is not shown;

Figure 12 is a front view of Figure 11;

Fig. 13 is a fifth preferred embodiment of the utility model with a torsion spring elastic unit;

Fig. 14 is the sixth preferred embodiment of the utility model with a torsion spring elastic unit;

Fig. 15 is a partial three-dimensional combined view of the seventh preferred embodiment of the utility model with a torsion spring elastic unit;

Fig. 16 is a side view combined view of the eighth preferred embodiment of the elastic unit with tension coil spring of the present utility model;

Figure 17 is a partial front view of Figure 16; and

Fig. 18 is a schematic view of Fig. 16 in the first and second positions.

(5) specific implementation

Referring to Fig. 3, a preferred embodiment of the utility model link type lifting device 100 includes: a base 1, a connecting seat 2, a first pivot unit 3, a first link unit 4, a second link The rod unit 5 , a second pivot unit 6 and a connecting member 65 .

The base 1 is a flat U-shape with four perforations 11 on the bottom side of the U-shape. The base 1 can be in other shapes and not limited to the U-shape.

The connecting seat 2 has a bottom wall 21, a front side wall 22 extending vertically and continuously from one end of the bottom wall 21, and a top wall 23, extending obliquely upwards from the other end of the top wall 23 to a vertically aligned bottom wall 21 free end. An inclined wall 24 and two side walls 25 perpendicular to the front side wall 22 and closing two opposite sides of the connecting seat 2 . The bottom wall 21 , the top wall 23 , and the inclined wall 24 each have four screw holes 26 .

The first pivot unit 3 has a connecting plate 31 , two first pivoting plates 32 vertically extending from the connecting plate 31 to both ends in the same direction, and a fixing plate 33 extending obliquely from the lower end of the connecting plate 31 . Each of the connecting plate 31 , the first pivoting plate 32 , and the fixing plate 33 has four through holes 34 .

The first link unit 4 is roughly H-shaped and has two parallel first rods 41, a first rib 42 connecting the middle sections of the two first rods 41, a first sheet 43 vertically extending from the upper end of the first rib 42, And a first column 44 vertically extending downward from the first rib 42 . The upper and lower ends of the two first rods 41 respectively have a through hole 40 , 45 .

The second link unit 5 is similar to the first link unit 4, and also has two second rods 51, a second rib 52, a second sheet 53 and a second column 54, and the second rod 51 is up and down. Each end has a through hole 55,56. The only difference is that the second sheet 53 extends from the lower end of the second rib 52 toward the first sheet 43 , and the second column 54 extends upward from the second sheet 53 .

The second pivot unit 6 includes two triangular second pivot plates 62 and a joint member 65 pivotally connected to the two second pivot plates 62 . Each second pivot plate 62 has three pivot holes 61 at three corners respectively; and the connecting member 65 has a rectangular fixed plate 651 and two lugs extending vertically in the same direction from opposite ends of the fixed plate 651 652. Each lug 652 has a joint hole 653 , and the rectangular fastening plate 651 has a fastening hole 654 at four corners respectively.

The assembly process of the connecting rod type lifting device of the present utility model is described in detail below:

Referring to FIGS. 3 , 4 , and 5 , four bolts 13 pass through the four through holes 11 of the base 1 , and the base 1 is screwed to the bottom wall 21 of the connecting seat 2 . Then eight bolts 38 pass through the eight through holes 34 of the connecting plate 31 and the fixing plate 33 of the first pivoting unit 3 to fix the first pivoting unit 3 to the inclined wall 24 and the top wall 23 of the connecting base 2 . Then pass four through holes 34 of the two first pivot plates 32 of the first pivot unit 3 with four bolts 39, and the first and second rod bodies 41,51 of the first and second connecting rod units 4,5. The lower end through holes 40, 55 are screwed to the four nuts 37 respectively.

Then, the two ends of an elastic unit 49 such as a coil spring are respectively sleeved on the first cylinder 44 of the first sheet 43 of the first link unit 4 and the first column 44 of the second sheet 53 of the second link unit 5 . Two cylinders 54.

Then pass three pivot holes 61 of a second pivot plate of the second pivot unit 6 with three bolts 63, and the upper end through holes 45, 56 and the connecting piece 65 on the first and second rod bodies 41, 51 sides. The combination hole 653 of the lug 652 on one side is screwed to the three nuts 64 respectively; similarly, the other three bolts 63 are used to match the other three nuts 64, and the other second pivot plate 62 is connected to the first, The upper ends on the other side of the two rod bodies 41, 51 and the lug 652 on the other side of the connecting piece 65 are screwed together, so that the first and second link units 4, 5 and the first and second pivot units 3, 6 are combined into a group of four A linkage mechanism, wherein the second linkage unit 5 is located below the first linkage unit 4 to be adjacent to each other. Finally, the fixing plate 651 of the connecting member 65 can be fixed to an object (such as a liquid crystal display, not shown), so that the object can be easily adjusted relative to the support surface of another object placed on the base 1 (not shown). Up, down, front, back position and pitch angle.

Then illustrate the operating state of the connecting rod type lifting device of the present utility model:

The solid lines in Fig. 2 and 4 represent a first position in which the device is raised. At this moment, the distance L between the first and second plates 43, 53 is longer, so the elastic unit 49 is not deformed or the amount of deformation is small. The dotted line represents a lowered second position. At this time, the distance l between the first and second pieces 43, 53 is relatively short, so the deformation of the elastic unit 49 is relatively large. When wanting to press down the liquid crystal display object from the first position to the second position, because the deformation of the elastic unit 49 is small, the elastic restoring force is small, and there is the help of the gravity W of the object itself, so it can be easily pressed down.

Conversely, when the liquid crystal display object is lifted from the second position to the first position, because of the large amount of deformation of the elastic unit 49 and the large elastic restoring force, a large amount of elastic potential energy accumulated in the elastic unit 49 can be released. Come out to help the lifting of the object, so as to achieve the purpose of saving labor.

As shown in Figures 6 and 7, the elastic unit 49 can also be changed from a coil spring to a torsion spring elastic unit 49a, which omits the first and second cylinders 44, 54, and has two wire holes 57 in the second sheet 53. The two free ends 48 of the torsion spring elastic unit 49a are fixedly connected, and the first piece 43 abuts against the circular arc end 47 of the torsion spring elastic unit 49a. In addition, Figs. 6 and 7 have the structure of two wire holes 57, which can also be fixedly connected to the torsion spring elastic unit 49b as shown in Fig. 8 .

As shown in Figures 9, 10, 11, and 12, the first and second sheets 43, 53 all have two wire holes 57 for affixing two torsion spring elastic units 49c, 49d. And this structure with four wire holes 57 can also be fixed to the torsion spring elastic unit 49e as shown in FIG. 13 .

In addition, as shown in Figures 14 and 15, the first and second cylinders 44 and 54 and the first and second sheets 43 and 53 in Figure 3 can also be omitted at the same time, and the upper and lower middle sections of the two first rods 41 can also be omitted. A hooking hole 58 is respectively formed at the lower part of the middle section of the two second rod bodies 51 . Hook the free end 48 of an elastic unit 49k to the hook holes 58 on the same side of the first and second rods respectively; The hook hole 58 on the side.

In addition, as shown in Figures 16, 17, and 18, in addition to omitting the first and second cylinders 44, 54 and the first and second sheets 43, 53 in Figure 3, the utility model can also use torsion springs or compression coils The spring is replaced with a tension coil spring elastic unit 49n, and one end of the tension coil spring elastic unit 49n is hooked to the lower edge of the first rib 42, and the other end is hooked to the upper edge of the second rib 52. Or further, the width of the first rib 42 is reduced to a horizontal bar (not shown) at the lower part of the first rod body middle section, and the width of the second rib 52 is reduced to a horizontal bar at the upper part of the second rod body middle section. A rod (not shown) is used for hooking the two ends of the tension coil spring elastic unit 49n.

In the embodiment of Fig. 16, 17, 18, when positioned at the higher first position, the moment distance H between the two ends of the first and second connecting rod units 4, 5 fixed stretching coil spring elastic unit 49n is higher than that at the higher position. In the low second position, the moment distance h between the two ends of the first and second link units 4 and 5 fixed stretching coil spring elastic unit 49n is small. Therefore, when applying force to press down the link type lifting device 100, it is necessary to overcome the elastic restoring force of the stretching deformation of the elastic unit 49n. Fortunately, at this time, with the help of the weight W of the liquid crystal display object, it can still be easily pressed down. Conversely, when the link type lifting device 100 is to be lifted from the second position to the first position, the elastic restoring force of the elastic unit 49n can help to overcome the downward weight W of the liquid crystal display object, so it can be lifted up effortlessly.

In addition, the first pivotal unit 3 can be directly fixed to the supporting surface of another object without using the connecting seat 2 and the base 1 . Or, after the first pivot unit 3 is fixed on the connecting base 2, it is directly fixed on the supporting surface of another object without the base 1.

In addition, the base 1 and the connecting seat 2 can be welded instead of bolted.

Moreover, the two second pivot plates 62 can be directly pivoted to the liquid crystal display object without the help of the connecting member 65 .

In each of the above embodiments, a plurality of elastic units 49, 49a, . . . can be provided in a link type lifting device 100 .

The advantages and technical effects of the link type lifting device of the present invention will be described in detail below.

As shown in Figure 2, the utility model is because the elastic unit 49 is arranged on the middle section of the first and second connecting rod units 4,5 instead of being located at one end 40,55 thereof, so the effect of the elastic restoring force f of the elastic unit 49 There is still a large moment arm d between the point and the root point (one end of the first and second rod bodies) 40 and 55, and the moment (f × d) generated by the product of the two is the same as that previously set at one end 96 of the connecting rod 95. The torque M provided by the torsion spring 94 of the utility model, if the weight W of the same liquid crystal display object is to be supported, the elastic restoring force f that the utility model elastic unit 49 needs to provide can be smaller, that is, the utility model elastic unit 49 The wire diameter or the number of turns can be small, so that assembly is easy and the material cost is reduced.

And because the elastic unit 49 of the present utility model is small and does not need the pivot 93 in the past, and the elastic unit 49 is arranged in the middle section of the connecting rod unit 4, 5 with a large space instead of the end, so the assembly is easy, thereby reducing the assembly and material costs. Low cost, and no friction noise.

In addition, because there is no frictional barrier of the conventional pivot 93, the internal stress that deforms the elastic unit 49 can be evenly distributed throughout the elastic unit 49 without local damage.

In addition, the middle sections of the connecting rod units 4 and 5 have a large space, so the structure of the fixed elastic unit 49 is allowed to be slightly changed, and various elastic units such as torsion, compression helix, or tension helix can be used for selection, and the design freedom is large.

Of course, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above The changes and modifications of the embodiments will all fall within the scope of the claims of the present utility model.

Claims (8)

1. A link type lifting device, one end of the lifting device is connected to a display screen, and the other end is connected to a supporting surface. When an external force is applied, the display screen can be raised and lowered relative to the supporting surface. The lifting device includes a first The link unit, a second link unit, a first pivot unit, a second pivot unit, and an elastic unit are characterized in that: The first link unit has two parallel first rod bodies; The second link unit is adjacently arranged below the first link unit, and the second link unit has two parallel second rod bodies; The first pivot unit has a connecting plate and a pair of opposite first pivoting plates extending from opposite ends of the connecting plate, the connecting plate is connected to the support surface, the first rod body and the second rod body The lower ends are respectively pivotally connected to the corresponding first pivotal plates; The second pivot unit has two opposite second pivot plates, respectively pivotally connected to the upper end of the first rod body and the upper end of the second rod body and fixedly connected to the display screen; The elastic unit is connected between the first link unit and the middle section of the second link unit. 2. The link type lifting device according to claim 1, wherein the first link unit also has a first rib connecting the two first rod bodies, and the second link unit also has a rib connecting the two first rods. A second rib of the two second rods, and the elastic unit is connected to the first rib and the second rib. 3. The link type lifting device according to claim 1, wherein the first link unit further has a first rib connecting the two first rod bodies, and a first rib extending from the first rib. sheet; the second link unit also has a second rib connecting the two second rods, and a second sheet extending from the upper edge of the second rib; and the elastic unit is connected to the first sheet and the second sheet. 4. The link type lifting device as claimed in claim 3, wherein the first link unit further has a first column protruding from the first sheet, and the second link unit also has a There is a second column protruding from the second sheet for fixing the elastic unit. 5. The link-type lifting device according to claim 1, 2 or 3, wherein the lifting device also has a connecting seat connected to the first pivot unit, so as to fix the lifting device on the support face. 6 . The link-type lifting device as claimed in claim 5 , wherein the lifting device further has a base connected to the connecting base for placing the lifting device on the supporting surface. 6 . 7. The link type lifting device as claimed in claim 1, 2 or 3, characterized in that: the second pivot unit also has two second pivot plates connecting the first and second link units, and connecting A connecting piece between the second pivot plate and the display screen. 8. The connecting rod type lifting device according to claim 1, characterized in that: the upper part of the middle sections of the two first rod bodies and the lower part of the middle parts of the two second rod bodies each have a hook hole, and the two parts of an elastic unit The free ends are respectively hooked and fixed to the hook holes on the same side of the first and second rod bodies; the two ends of the other elastic unit are respectively hooked and fixed to the hook holes on the other side of the first and second rod bodies.

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