CN214761895U - Visual sick bed back angle adjusting device - Google Patents

Abstract

The utility model belongs to the technical field of medical care sickbed, a visual sick bed back angle adjusting device is disclosed, include: the conveying belt assembly is arranged in the fixed base, the first indicating assembly is arranged at the front end of the fixed base, and the telescopic connecting rod and the second indicating assembly are arranged at the rear end of the fixed base; the conveying belt assembly comprises a front conveying roller, a rear conveying roller and a conveying belt with angle scales on the surface; the first indicating assembly is matched with the conveyor belt so as to indicate the current lifting angle of the movable bed board at the tail of the sickbed; the telescopic connecting rod, the rear conveying roller and the second indicating component are coaxially assembled, and one end of the telescopic connecting rod, which is far away from the fixed seat, is rotatably connected to the bottom of the movable bed plate; the second indicating component is used for indicating the current lifting angle of the movable bed board on the side surface of the sickbed; therefore, the utility model can effectively complete the indication of the lifting angle of the backrest without changing the existing sickbed structure.

Description

Visual sick bed back angle adjusting device

Technical Field

The utility model belongs to the technical field of medical care sickbed, concretely relates to visual sick bed back angle adjusting device.

Background

At present, sickbeds used in most of domestic hospitals are multifunctional adjustable nursing beds, and the most frequently used sickbed has the function of manually or automatically adjusting the bed head to lift (referred to as 'backrest lifting'). During nursing, the back rest is lifted, so that various treatment and nursing purposes of reducing right heart preload, reducing respiratory muscle movement resistance, reducing abdominal wall tension and the like can be achieved.

However, for the existing nursing sickbed, the accurate backrest lifting angle cannot be reflected in time during specific adjustment, so that the accurate and effective nursing effect is difficult to achieve for different patients.

Disclosure of Invention

In view of this, in order to solve the problems in the background art, the present invention provides a visual sickbed backrest angle adjusting device.

In order to achieve the above object, the utility model provides a following technical scheme: a visual sick bed back angle adjustment device, wherein:

the sickbed comprises a fixed bed board and a movable bed board which are rotatably connected, and the ends of the fixed bed board and the movable bed board far away from each other are a bed tail and a bed head respectively;

the adjusting device comprises:

the fixed seat is arranged at the bottom of the fixed bed board, the front end of the fixed seat extends out of the bed tail, and the rear end of the fixed seat is close to the bed head;

the conveying belt assembly is arranged in the fixed seat; the conveying belt assembly comprises a front conveying roller, a rear conveying roller and a conveying belt, wherein the surface of the conveying belt is provided with angle scales;

the first indicating assembly is arranged at the front end of the fixed seat and matched with the conveyor belt so as to indicate the current lifting angle of the movable bed board at the tail of the sickbed;

the telescopic connecting rod and the second indicating component are arranged at the rear end of the fixed seat, and the telescopic connecting rod, the rear conveying roller and the second indicating component are coaxially assembled; one end of the telescopic connecting rod, which is far away from the fixed seat, is rotatably connected with a U-shaped connecting seat, and the U-shaped connecting seat is welded at the bottom of the movable bed board and is close to the bed head; the second indicating component is used for indicating the current lifting angle of the movable bed board on the side surface of the sickbed.

Preferably, the first indicating means comprises: the perspective window is arranged at the top of the fixed seat; the indicating rod group is arranged in the fixed seat; the indicating rod group is located right below the perspective window and comprises an upper indicating rod and a lower indicating rod, the conveying belt penetrates through an indicating gap between the upper indicating rod and the lower indicating rod, and the upper indicating rod corresponds to the angle scales on the conveying belt.

Preferably, the first indicating assembly is positioned above the front conveying roller, and the lower indicating rod is rotatably installed in the fixed seat.

Preferably, the second indicating component comprises: the indicating plate is coaxially assembled with the rear conveying roller, and an indicating needle is fixed on the indicating plate; the indicating ring is sleeved on the outer side of the indicating disc and provided with angle scales, the indicating ring is connected with the fixed seat, and the indicating needle corresponds to the angle scales on the indicating ring.

Preferably, a rotating handle is arranged on one side of the fixed seat, and the rotating handle is coaxially assembled with the front conveying roller and is positioned on the same side with the indicating disc.

Preferably, still be equipped with in the fixing base with conveyer belt subassembly complex spacing subassembly, just spacing subassembly includes: the limiting rod is movable in the front-back direction and is positioned below the conveyor belt component; and the two limiting plates are fixed at the tops of the limiting rods and can be respectively meshed with the rotating shafts of the front conveying roller and the rear conveying roller.

Preferably, the fixing base is run through to the front end of gag lever post, be connected with spacing spring between the rear end of gag lever post and the fixing base inner wall, and when spacing spring was compressed, the limiting plate separated with corresponding the pivot.

Preferably, a matching chute is formed in one side of the limiting rod, a matching insertion rod penetrates through one side of the fixing seat, when the matching insertion rod is inserted into the matching chute, the limiting rod moves backwards, and the limiting spring is compressed.

Preferably, the end of the matching inserted bar far away from the matching chute is fixed on the indicating ring, and a return spring is connected between the indicating ring and the fixed seat.

Preferably, the front end of the limiting rod is welded with a connecting plate; one side of the fixed seat is welded with a threaded sleeve; be connected with positioning screw between even board and the swivel nut, wherein: the positioning screw penetrates through the connecting plate and is in sliding fit with the connecting plate; the positioning screw rod penetrates through the threaded sleeve and is in spiral fit with the threaded sleeve; a limiting ring is fixed on the positioning screw rod and limited on the front side of the connecting plate.

Compared with the prior art, the utility model, following beneficial effect has:

(1) the adjusting device of the utility model mainly comprises a fixed seat and a telescopic connecting rod which are matched in a rotating way, the fixed seat is arranged at the bottom of the fixed bed board, and the telescopic connecting rod is matched at the bottom of the movable bed board, thereby facilitating the realization of the fixed matching between the utility model and the existing sickbed, and realizing the synchronous lifting of the utility model and the existing sickbed on the premise of not changing the structure of the existing sickbed; and still form the instruction subassembly of tailstock, bedside on the fixing base based on the conveyer belt subassembly to this reaches the effect of accurate instruction telescopic link and the angle of lifting up of current sick bed back.

(2) Aiming at the first indicating component positioned at the bed tail, the bed tail comprises a conveyor belt with angle scales in the conveyor belt component, a perspective window, an indicating rod group and the like, and has the advantages of accurate indication and simple structure.

(3) The conveyor belt component is correspondingly provided with a limiting component, so that the conveyor belt component can be switched between passive conveying and active conveying; specifically, when the conveyor belt assembly is in a passive conveying state, the conveyor belt assembly can be matched with an existing lifting structure in the existing sickbed to be driven to lift; and when the conveyer belt subassembly was in under the initiative transport state, then can manually order about the utility model discloses an adjusting device carries out the drive of sick bed back and lifts to this user demand under effectively satisfying different situation, and under above-mentioned two kinds of states, the homoenergetic realizes lifting up the accurate instruction of angle.

(4) The limiting component mainly comprises a movable limiting rod and a limiting plate, wherein the limiting plate is meshed with a front conveying roller and a rotating shaft in a rear conveying roller, so that the positioning of the whole conveying belt component is realized, the positioning of the whole adjusting device is further realized in an active conveying state, and the stability of the positioning after the sickbed is lifted up in the state is effectively guaranteed.

(5) Aiming at the limiting rod, a positioning assembly formed by matching a threaded sleeve and a positioning screw rod is correspondingly arranged, so that the initial state of the limiting rod can be effectively positioned, the effective adjustment of the matching state between the conveying belt assembly and the limiting assembly is conveniently realized, and the switching requirement of the conveying belt assembly between passive conveying and active conveying is further met.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic view of the structure of the conveyor belt assembly of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 2;

FIG. 5 is an enlarged view of FIG. 2 at B;

FIG. 6 is an enlarged view at C in FIG. 2;

fig. 7 is a schematic view of the indicator panel and the indicator ring according to the present invention;

FIG. 8 is a schematic diagram of the belt assembly and the telescopic link according to the present invention;

in the figure: a fixed seat-1; a perspective window-11; an indicator stem set-12; an upper indicator stem-13; a lower indicator stem-14; rotating the handle-15; a screw sleeve-16; positioning screw rod-17; a stop collar-18; a conveyor belt assembly-2; a front transfer roller-21; a rear conveying roller-22; a conveyor belt-23; a telescopic connecting rod-3; u-shaped connecting seat-31; an indicator panel-4; an indicator ring-41; a limiting rod-5; a limiting plate-51; a limiting spring-52; a mating chute-53; a mating bayonet-54; a return spring-55; a connecting plate-56.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a visual sickbed backrest angle adjusting device, which specifically comprises:

the sickbed comprises a fixed bed board and a movable bed board which are rotatably connected, and the ends of the fixed bed board and the movable bed board far away from each other are a bed tail and a bed head respectively;

the adjusting device comprises:

install in the fixing base 1 of fixed bed board bottom, and the front end of fixing base 1 stretches out the tailstock, and the rear end is close to the head of a bed.

The conveyor belt component 2 is arranged in the fixed seat 1; the conveyor belt assembly 2 comprises a front conveyor roller 21, a rear conveyor roller 22 and a conveyor belt 23 with angle scales on the surface, the front conveyor roller 21 is located on the front side of the tail of the sickbed, the rear conveyor roller 22 is close to the head of the sickbed, and the front conveyor roller 21 and the rear conveyor roller 22 are sleeved with the conveyor belt 23.

The first indicating component is arranged at the front end of the fixed seat 1 and matched with the conveyor belt 23 so as to indicate the current lifting angle of the movable bed board at the tail of the sickbed; specifically, the first indicating component comprises:

the perspective window 11 is arranged at the top of the fixed seat 1;

an indicating rod group 12 arranged inside the fixed seat 1;

the indicating rod group 12 is positioned right below the perspective window 11, the indicating rod group 12 comprises an upper indicating rod 13 and a lower indicating rod 14, the conveyor belt 23 passes through an indicating gap between the upper indicating rod 13 and the lower indicating rod 14, and the upper indicating rod 13 corresponds to an angle scale on the conveyor belt 23; wherein, the first indicating component is positioned above the front conveying roller 21, and the lower indicating rod 14 is rotatably installed in the fixed seat 1.

The telescopic connecting rod 3 and the second indicating component are arranged at the rear end of the fixed seat 1, and the telescopic connecting rod 3, the rear conveying roller 22 and the second indicating component are coaxially assembled; one end of the telescopic connecting rod 3, which is far away from the fixed seat 1, is rotatably connected with a U-shaped connecting seat 31, and the U-shaped connecting seat 31 is welded at the bottom of the movable bed board and is close to the bed head; the second indicating component is used for indicating the current lifting angle of the movable bed board on the side surface of the sickbed; specifically, the second indicating component includes:

the indicating plate 4 is coaxially assembled with the rear conveying roller 22, and an indicating needle is fixed on the indicating plate 4;

the indicating ring 41 is sleeved outside the indicating disc 4 and has angle scales, the indicating ring 41 is connected with the fixed seat 1, and the indicating needle corresponds to the angle scales on the indicating ring 41.

Based on the above-mentioned disclosure structure, the utility model discloses in can provide following two kinds of embodiments

Example one

In this embodiment, the conveyor belt assembly 2 is set to a passive conveying state, i.e. a backrest adjusting structure is already provided in the existing hospital bed, on the basis of which the adjusting device of the present invention only plays a role in indicating the lifting angle.

In this embodiment, the rotation of the movable bed board of the hospital bed is lifted based on the structure of the hospital bed, and by combining the above structure, the movable bed board can be lifted synchronously by driving one end of the telescopic connecting rod 3 through the U-shaped connecting seat 31 after being rotated, and the telescopic connecting rod 3 is driven to rotate at the same angle in the process, and meanwhile, the telescopic connecting rod 3 is stretched. And telescopic link 3 can drive back transfer roller 22 and dial 4 and carry out synchronous rotation when rotating, realizes the conveying of conveyer belt 23 from this, and then changes the corresponding position of pointer and pointer 41 scale on dial 4 and the corresponding position of pointer group 12 and conveyer belt 23 scale on conveyer belt subassembly 2, on this basis in the in-process of lifting up the regulation, realizes the real-time instruction to lifting up the angle.

Example two

In this embodiment, set up conveyor belt subassembly 2 for the initiative transmission state, do not be equipped with the back in the current sick bed promptly and adjust the structure, or existing back is adjusted the structure and is damaged unable use, based on this, the utility model discloses an adjusting device both plays the effect that the drive activity bed board lifted, plays the effect that the angle was lifted in the instruction again.

In the present embodiment, in order to achieve the active conveyance state of the conveyor belt assembly 2, the following structure should be provided:

a rotating handle 15 is arranged on one side of the fixed seat 1, and the rotating handle 15 is coaxially assembled with the front conveying roller 21 and is positioned on the same side with the indicating disc 4. Based on this, active transport of the conveyor belt assembly 2 can be achieved at the foot position by actuating the turning handle 15 to turn.

Still be equipped with in fixing base 1 with 2 complex spacing subassemblies of conveyer belt subassembly, and spacing subassembly includes:

the limiting rod 5 is movable in the front-back direction, and the limiting rod 5 is positioned below the conveyor belt component 2;

and two limiting plates 51 fixed on the top of the limiting rod 5, wherein the two limiting plates 51 can be respectively engaged with the rotating shafts of the front conveying roller 21 and the rear conveying roller 22.

Further, regarding the limiting rod 5, the front end thereof penetrates through the fixing base 1, a limiting spring 52 is connected between the rear end and the inner wall of the fixing base 1, and when the limiting spring 52 is compressed, the limiting plate 51 is separated from the corresponding rotating shaft.

In addition, a matching inclined groove 53 is formed in one side of the limiting rod 5, a matching insertion rod 54 penetrates through one side of the fixing seat 1, when the matching insertion rod 54 is inserted into the matching inclined groove 53, the limiting rod 5 moves backwards, and the limiting spring 52 is compressed. And one end of the matching inserted rod 54 far away from the matching inclined groove 53 is fixed on the indicating ring 41, and a return spring 55 is connected between the indicating ring 41 and the fixed seat 1. On this basis, the movement of the indicating ring 41 can be realized, and when the indicating ring 41 is pushed to approach the fixed seat 1, the active transmission of the conveyor belt assembly 2 can be realized at the side of the sickbed by rotating the indicating disc 4.

In summary, in the embodiment

When the conveyor belt assembly 2 is driven to actively convey at the tail of the bed: the limiting rod 5 is pushed towards the direction close to the fixed seat 1, so that the backward conveying roller 22 is driven to move in the direction, the two limiting plates 51 are driven to move synchronously, and the limiting spring 52 is compressed; under this state, then realize two limiting plates 51 and correspond the separation between the pivot to make whole conveyer belt assembly 2 be in rotatable state, then manually order rotating handle 15 to rotate, convey roller 21 synchronous rotation before driving with this, and reach the effect of ordering about conveyer belt 23 conveying, then conveying roller 22 then produces under the conveying drive of conveyer belt 23 and rotate, and then drive indicator panel 4 and telescopic link 3 and carry out synchronous rotation. Wherein: the conveying of the conveying belt 23 realizes the indication at the bed tail and the indication of the side surface of the sickbed by the rotation of the indicating disc 4, and the rotation of the telescopic connecting rod 3 can effectively drive the movable bed board to rotate and lift.

When the sickbed side drives the conveyor belt component 2 to actively convey: to the direction promotion indicating ring 41 that is close to fixing base 1, from this compression reset spring 55, and with cooperation inserted bar 54 push fit the chute 53 in, specifically in fig. 6, based on the inclined plane cooperation of cooperation inserted bar 54 with fit the chute 53, can order about this moment and promote the direction removal that gag lever post 5 was sent roller 22 backward, thereby compress spacing spring 52, and drive two limiting plates 51 and correspond the pivot separation, make conveyer belt assembly 2 be in rotatable state from this, then manual rotation indicating dial 4, carry out synchronous revolution with this drive back transfer roller 22 and telescopic link 3. Wherein: the rotation of the rear conveying roller 22 drives the conveying belt 23 to convey, so that the indication at the tail of the bed is realized, the rotation of the telescopic connecting rod 3 can effectively drive the movable bed board to rotate and lift, and the rotation of the indicating disc 4 realizes the indication of the side surface of the sickbed.

To above-mentioned tailstock drive and side drive, after the drive is accomplished, unclamp gag lever post 5 or indicating ring 41, realize the reseing of limiting plate 51 from this under the resilience of limiting spring 52 to guarantee that two limiting plates 51 can mesh with the pivot of preceding transfer roller 21 and back transfer roller 22 respectively, and then reach the effect that the whole conveyer belt subassembly 2 of injecing can not convey.

More specifically, based on the driving of the present embodiment, the specific principle thereof can be known in conjunction with fig. 8: in the figure, a is the rotating connection part of the rear conveying roller 22 and the telescopic connecting rod 3, b is the connection part of the fixed bed board and the movable bed board in the sickbed, c is the rotating connection part of the telescopic connecting rod 3 and the movable bed board, d is the length of the telescopic connecting rod 3, e is the tailstock part, f is the indication observation part of the tailstock, g is the head of the bed, and the dotted line matched with g is the stroke path of lifting the head of the bed. Wherein:

when the bed is driven, the position a can be in a rotatable state, so that the telescopic connecting rod 3 can be effectively driven to rotate, and the connection between the telescopic connecting rod 3 and the movable bed board can be always kept based on the extension and retraction of the telescopic connecting rod 3 in the rotating process.

When the movable bed plate is positioned, the position a is in a non-rotatable state due to the limitation of the limiting plate 51, so that the inclination angle (namely the connection direction of ac) of the telescopic connecting rod 3 is limited, and in addition, the length between bc is kept unchanged, so that a stable triangular connection structure can be formed between a/b/c, and the lifting stability of the movable bed plate is effectively ensured.

To two above-mentioned embodiments, for making the utility model discloses an adjusting device can effectively satisfy two kinds of states, then provides following locating component and carries out the structure and prescribe a limit to and the state switches. Specifically, the method comprises the following steps:

a connecting plate 56 is welded at the front end of the limiting rod 5;

one side of the fixed seat 1 is welded with a threaded sleeve 16;

a positioning screw 17 is connected between the connecting plate 56 and the screw sleeve 16, wherein: the positioning screw 17 penetrates through the connecting plate 56 and is in sliding fit with the connecting plate 56; the positioning screw 17 penetrates through the threaded sleeve 16 and is in spiral fit with the threaded sleeve 16;

the retainer ring 18 is fixed to the positioning screw 17, and the retainer ring 18 is defined on the front side of the link plate 56.

Based on this, the distance between the stop collar 18 and the threaded sleeve 16 can be effectively adjusted by rotating the positioning screw 17, so as to limit the initial positions of the connecting plate 56 and the stop rod 5.

When the limiting rod 5 is positioned at the initial position, the limiting plate 51 can just be meshed with the corresponding rotating shaft, so that the active adjustment disclosed in the second embodiment can be effectively realized;

when the limiting rod 5 is positioned at the initial position two, the positioning screw 17 is rotated to enable the limiting ring 18 to be close to the threaded sleeve 16, so that the connecting plate 56 and the limiting rod 5 are pushed to be close to the fixing seat 1, the two limiting plates 51 are driven to be separated from the corresponding rotating shafts, and the limiting spring 52 is compressed, and at the moment, the passive indication disclosed in the embodiment can be effectively realized;

as described above, due to the spiral limitation of the positioning screw 17 and the threaded sleeve 16, the whole limiting assembly does not automatically move, thereby effectively ensuring that the driving states in the two embodiments do not interfere with each other.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a visual sick bed back angle adjusting device which characterized in that:

the sickbed comprises a fixed bed board and a movable bed board which are rotatably connected, and the ends of the fixed bed board and the movable bed board far away from each other are a bed tail and a bed head respectively;

the adjusting device comprises:

the bed comprises a fixed seat (1) arranged at the bottom of a fixed bed board, wherein the front end of the fixed seat (1) extends out of a bed tail, and the rear end of the fixed seat (1) is close to a bed head;

the conveyor belt component (2) is arranged in the fixed seat (1); the conveying belt assembly (2) comprises a front conveying roller (21), a rear conveying roller (22) and a conveying belt (23) with angle scales on the surface, the front conveying roller (21) is located on the front side of the tail of a sickbed, the rear conveying roller (22) is close to the head of the sickbed, and the conveying belt (23) is sleeved on the front conveying roller (21) and the rear conveying roller (22);

the first indicating assembly is arranged at the front end of the fixed seat (1) and matched with the conveyor belt (23) so as to indicate the current lifting angle of the movable bed board at the tail of a sickbed;

the telescopic connecting rod (3) and the second indicating assembly are arranged at the rear end of the fixed seat (1), and the telescopic connecting rod (3), the rear conveying roller (22) and the second indicating assembly are coaxially assembled; one end of the telescopic connecting rod (3) far away from the fixed seat (1) is rotatably connected with a U-shaped connecting seat (31), and the U-shaped connecting seat (31) is welded at the bottom of the movable bed board and is close to the bed head; the second indicating component is used for indicating the current lifting angle of the movable bed board on the side surface of the sickbed.

2. The visual bed backrest angle adjustment device of claim 1, wherein the first indicating assembly comprises:

the perspective window (11) is arranged at the top of the fixed seat (1);

the indicating rod group (12) is arranged in the fixed seat (1);

the indicating rod group (12) is located right below the perspective window (11), the indicating rod group (12) comprises an upper indicating rod (13) and a lower indicating rod (14), the conveying belt (23) penetrates through an indicating gap between the upper indicating rod (13) and the lower indicating rod (14), and the upper indicating rod (13) corresponds to an angle scale on the conveying belt (23).

3. The visual sickbed backrest angle adjusting device according to claim 2, characterized in that the first indicating assembly is located above the front conveying roller (21), and the lower indicating rod (14) is rotatably installed in the fixed seat (1).

4. The visual bed backrest angle adjustment device of claim 1, wherein the second indicator assembly comprises:

the indicating plate (4) is coaxially assembled with the rear conveying roller (22), and an indicating needle is fixed on the indicating plate (4);

the indicating ring (41) is sleeved on the outer side of the indicating disc (4) and provided with angle scales, the indicating ring (41) is connected with the fixed seat (1), and the indicating needle corresponds to the angle scales on the indicating ring (41).

5. The visual sickbed backrest angle adjusting device according to claim 4, characterized in that a rotating handle (15) is arranged on one side of the fixed seat (1), and the rotating handle (15) is coaxially assembled with the front conveying roller (21) and is positioned on the same side with the indicating disk (4).

6. The visual sickbed backrest angle adjusting device according to claim 4, characterized in that a limiting component matched with the conveyor belt component (2) is further arranged in the fixing seat (1), and the limiting component comprises:

the limiting rod (5) can move in the front-back direction, and the limiting rod (5) is positioned below the conveyor belt component (2);

and the two limiting plates (51) are fixed at the top of the limiting rod (5), and the two limiting plates (51) can be respectively meshed with the rotating shafts of the front conveying roller (21) and the rear conveying roller (22).

7. The visual sickbed backrest angle adjusting device according to claim 6, characterized in that: the front end of gag lever post (5) runs through fixing base (1), be connected with between the rear end of gag lever post (5) and fixing base (1) inner wall spacing spring (52), and when spacing spring (52) were compressed, limiting plate (51) with correspond the pivot separation.

8. The visual sickbed backrest angle adjusting device according to claim 7, characterized in that: a matching inclined groove (53) is formed in one side of the limiting rod (5), a matching insertion rod (54) penetrates through one side of the fixing seat (1), when the matching insertion rod (54) is inserted into the matching inclined groove (53), the limiting rod (5) moves backwards, and the limiting spring (52) is compressed.

9. The visual sickbed backrest angle adjusting device according to claim 8, wherein: one end, far away from the matching inclined groove (53), of the matching inserted rod (54) is fixed on the indicating ring (41), and a return spring (55) is connected between the indicating ring (41) and the fixed seat (1).

10. The visual bed backrest angle adjusting device of any one of claims 7-9, wherein:

a connecting plate (56) is welded at the front end of the limiting rod (5);

one side of the fixed seat (1) is welded with a threaded sleeve (16);

be connected with positioning screw (17) between even board (56) and swivel nut (16), wherein: the positioning screw rod (17) penetrates through the connecting plate (56) and is in sliding fit with the connecting plate (56); the positioning screw rod (17) penetrates through the threaded sleeve (16) and is in spiral fit with the threaded sleeve (16);

a limiting ring (18) is fixed on the positioning screw (17), and the limiting ring (18) is limited on the front side of the connecting plate (56).

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