CN114504442B - An ophthalmic diagnosis and treatment bed - Google Patents

Abstract

The invention relates to the technical field of medical appliances, in particular to an ophthalmic diagnosis and treatment bed. A movable plate facing one end of the bed body is movably installed on the bottom plate, and a lifting plate is slid up and down on the side of the movable plate close to the bed body, and the lifting plate is close to the bed. There is a headrest bracket on one side of the body; a connecting seat is fixedly installed on the side of the lifting plate away from the bed body, and the connecting seat is threaded on the screw rod; one end of the transmission shaft is fixedly installed with a driving bevel gear, and the lower end of the screw rod is fixedly installed There is a passive bevel gear; the bottom plate is rotated and installed with a threaded pipe that matches the external thread of the drive shaft; the end of the drive shaft away from the drive bevel gear is fixedly installed with a slider, and the bottom plate is also rotated through the support plate. A sleeve with a coaxial shaft; the application can conveniently and flexibly adjust the distance between the headrest bracket and the bed body and the height of the headrest bracket, so as to meet the various needs of the patient and avoid the patient from maintaining a fixed posture for a long time. Tired.

Description

An ophthalmic diagnosis and treatment bed

technical field

The invention relates to the technical field of medical appliances, in particular to an ophthalmic diagnosis and treatment bed.

Background technique

With the popularity of electronic products, eye diseases have also begun to surround our lives. In addition to drug treatment, some eye diseases require surgical treatment. After eye surgery, patients may need to remain on their stomach for a period of time.

The invention patent with the application number of CN202110772385.3 discloses a patient lying down table for ophthalmic surgery, comprising: a lying down table body, the lying down table body includes a lying down table top and a table support mechanism for supporting the lying down table top. The table top includes a rigid table body that provides a support surface and a soft pad arranged on the rigid table body. One end of the rigid table body is fixedly mounted with a head table body, and the head table body is constructed with at least one face for a patient in a prone state. The cut-out part is placed. The patient lying table for ophthalmic surgery provided by the invention can enable the patient to lie down and rest in a relatively comfortable position.

However, the head body of the above-mentioned patient lying table for ophthalmic surgery is fixed on the rigid body, and the position of the head body cannot be adjusted flexibly, and the patient is prone to fatigue when the patient maintains a fixed posture for a long time, which is inconvenient to use.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an ophthalmic diagnosis and treatment bed, which is convenient for flexibly adjusting the position of the headrest bracket, so as to solve the problems in the prior art.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: an ophthalmic diagnosis and treatment bed, comprising a bottom plate, a bed body and a headrest bracket, the two ends of the bottom of the bed body along the length direction are respectively fixed with support plates, the The lower end of the support plate is fixedly installed on the bottom plate, and a movable plate facing one end of the bed body is movably installed on the bottom plate, the movable plate can slide along the length direction of the bed body, and the movable plate The side close to the bed body is slidably installed with a lift plate, and the side of the lift plate close to the bed body is provided with the headrest bracket; the side of the movable plate away from the bed body is relatively fixed up and down Two supports are installed, a vertically extending screw rod is rotatably installed between the two supports, and a connecting seat is fixedly installed on the side of the lifting plate away from the bed body, and the connecting seat is threadedly connected to the On the screw rod; the movable plate is rotatably installed with a transmission shaft extending along the length direction of the bed body, one end of the transmission shaft is fixedly installed with a driving bevel gear, and the lower end of the screw rod is fixedly installed with a The driven bevel gear meshes with the driving bevel gear; the outer side of one end of the transmission shaft away from the driving bevel gear is provided with an external thread, and the bottom plate is rotatably installed with the external thread of the transmission shaft through a support plate. A matching threaded pipe; a slider is fixedly installed at one end of the transmission shaft away from the driving bevel gear, and a sleeve coaxially arranged with the transmission shaft is also installed on the bottom plate through a support plate. There is a sliding cavity extending along its length direction, and the sliding block is slidably installed in the sliding cavity; the bed body is provided with a sliding cavity for driving the threaded pipe to rotate or driving the threaded pipe and the sleeve A linkage mechanism that rotates synchronously.

As a preferred technical solution, a guide rail extending along the length direction of the bed body is fixedly installed on the bottom plate, and the lower end of the movable plate is slidably installed on the guide rail.

As a preferred technical solution, a side of the movable plate close to the bed body is provided with a vertically extending guide groove, and the lift plate is provided with a guide block matching the guide groove.

As a preferred technical solution, the linkage mechanism includes a rotating sleeve rotatably mounted on the support plate adjacent to the movable plate, the rotating sleeve is arranged in parallel with the transmission shaft, and the rotating sleeve is connected to the A first chain is connected between the threaded pipes; a mounting plate between the two support plates is fixedly installed at the bottom of the bed body, and an adjusting shaft is rotatably installed on the side of the mounting plate close to the rotating sleeve , the adjusting shaft and the rotating sleeve are arranged coaxially, and a second chain is connected between the adjusting shaft and the sleeve; the rotating sleeve is provided with a sliding hole extending along its axis, and the sliding hole A prismatic sliding rod is slidably installed inside, one end of the adjusting shaft is provided with a slot for inserting the end of the sliding rod, and one end of the sliding rod away from the adjusting shaft is fixedly installed with a rocking handle.

As a further improvement, a positioning gear is fixedly installed on the adjustment shaft, and a swing plate is hinged on the side of the mounting plate close to the rotating sleeve through a hinge seat, and the swing plate can swing up and down around the hinge seat, so A positioning rack matched with the positioning gear is fixedly installed at the bottom of the swing plate, and a first spring is connected between the bed body and the swing plate to engage the positioning rack with the positioning gear ; A disc is fixedly installed on the sliding rod between the rotating sleeve and the adjusting shaft, the disc and the adjusting shaft are coaxially arranged, and the swing plate is far from one end of the hinge seat. The bottom is provided with a guiding inclined surface, and the guiding inclined surface is facing the outer edge of the disc; a baffle is fixedly installed on the sliding rod located between the rotating sleeve and the crank handle, and the sliding rod is covered with a cover A second spring is provided between the baffle plate and the rotating sleeve.

As a preferred technical solution, the headrest bracket includes a support seat, and an end of the support seat away from the bed body is rotatably mounted with a mounting shaft extending along the length direction of the bed body, and the mounting shaft is far away from the support One end of the seat is fixedly installed on the lifting plate, and one end of the support seat close to the bed body is provided with a U-shaped groove, and a ring-shaped headrest is arranged in the U-shaped groove, and the ring-shaped headrest is arranged along the bed. Small shafts are respectively fixedly installed on both sides in the width direction of the body, the small shafts extend along the width direction of the bed body, and the small shafts are rotatably installed in the U-shaped grooves.

As a further improvement, an installation cavity is provided in the support seat, the end of the small shaft away from the annular headrest extends into the installation cavity and a limit gear is fixedly installed, and the installation cavity is provided with two Each of the limit gears corresponds to one movable column, the movable column extends along the length direction of the bed body, and a guide sleeve is sleeved on the movable column, and the guide sleeve is fixedly installed in the installation cavity. On the inner wall, one end of the movable column away from the lift plate is fixedly installed with a limit rack matched with the limit gear; the end of the installation shaft away from the lift plate extends into the installation cavity and is A circular positioning plate is fixed and installed coaxially, the side of the positioning plate close to the lifting plate is evenly spaced with a plurality of slots around the axis, and one of the ends of the two movable columns away from the limit rack A connecting plate is fixedly installed between the two, the connecting plate is provided with an escape hole for the installation shaft to pass through, the connecting plate is provided with a clamping block that matches the card slot, and the connecting plate is close to the A third spring is connected between one side of the lift plate and the inner wall of the installation cavity.

As a further improvement, a toggle handle is fixedly installed on one side of the two movable columns away from each other, and the support base is provided with a strip hole for the toggle handle to pass through.

Beneficial effects:

Due to the adoption of the above technical solution, an ophthalmic diagnosis and treatment bed is provided. A movable plate facing one end of the bed body is movably installed on the bottom plate, and a lifting plate is slid up and down on the side of the movable plate close to the bed body. A headrest bracket is arranged on the side; a connecting seat is fixedly installed on the side of the lifting plate away from the bed body, and the connecting seat is threadedly connected to the screw; one end of the transmission shaft is fixedly installed with a driving bevel gear, and the lower end of the screw is fixedly installed with a driving A passive bevel gear meshing with bevel gears; a threaded pipe matching the external thread of the transmission shaft is installed on the bottom plate through a supporting plate; the end of the transmission shaft away from the driving bevel gear is fixedly installed with a slider, and the bottom plate is also rotated through the supporting plate A sleeve arranged coaxially with the transmission shaft is installed;

The application can conveniently and flexibly adjust the distance between the headrest bracket and the bed body and the height of the headrest bracket, so as to meet the various needs of the patient and avoid the fatigue caused by the patient maintaining a fixed posture for a long time;

The annular headrest of the present application can be adjusted at multiple angles, so that the head and neck of the patient have a larger range of motion, so as to improve the comfort of the patient.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of an embodiment of the present invention;

2 is a schematic partial cross-sectional view of an embodiment of the present invention;

3 is a schematic structural diagram of a linkage mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a slide bar according to an embodiment of the present invention when inserted into the slot;

5 is a schematic top view of a headrest bracket according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a positioning disc according to an embodiment of the present invention.

In the figure: 1- bottom plate; 2- bed body; 3- headrest bracket; 4- support plate; 5- movable plate; 6- lift plate; 7- screw rod; 8- connecting seat; 9- transmission shaft; 10- Driving bevel gear; 11-passive bevel gear; 12-threaded pipe; 13-slider; 14-sleeve; 15-sliding cavity; 16-guide rail; 17-guide groove; 18-guide block; 19-rotating sleeve; 20 -First chain; 21-Installation plate; 22-Adjustment shaft; 23-Second chain; 24-Slide hole; 25-Slide rod; 26-Slot; ;30-swing plate;31-positioning rack;32-first spring;33-disc;34-guide slope;35-baffle plate;36-second spring;37-support seat;38-installation shaft;39 -U-shaped groove; 40-ring headrest; 41-small shaft; 42-installation cavity; 43-limiting gear; 44-active column; 45-guide sleeve; 46-limiting rack; 47-positioning plate; 48 -Card slot; 49-Connecting plate; 50-Block; 51-Third spring; 52-Dial handle; 53-Strip hole.

Detailed ways

As shown in FIG. 1 to FIG. 6, an ophthalmic diagnosis and treatment bed includes a bottom plate 1, a bed body 2 and a headrest bracket 3. The two ends of the bottom of the bed body 2 along the length direction are respectively fixed with support plates 4. The support plates 4 The lower end of the base plate 1 is fixedly installed on the bottom plate 1, and a movable plate 5 facing one end of the bed body 2 is movably installed on the bottom plate 1. The movable plate 5 can slide along the length direction of the bed body 2, and the movable plate 5 is close to the side of the bed body 2. A lift plate 6 is slidably installed up and down, and a headrest bracket 3 is provided on the side of the lift plate 6 close to the bed body 2 . When the patient lies on the bed body 2 , the headrest bracket 3 supports the patient's head.

The side of the movable plate 5 away from the bed body 2 is fixedly installed with two supports up and down relative to each other, a vertically extending screw rod 7 is rotatably installed between the two supports, and the side of the lifting plate 6 away from the bed body 2 is fixedly installed with The connecting seat 8, the movable plate 5 and the connecting seat 8 are provided with elongated holes for the connecting seat 8 to pass through, and the connecting seat 8 is threaded on the screw rod 7; the movable plate 5 is rotated and installed along the bed 2 The drive shaft 9 extending in the length direction of the drive shaft 9, one end of the drive shaft 9 is fixedly installed with a driving bevel gear 10, the lower end of the screw 7 is fixedly installed with a driven bevel gear 11 that meshes with the driving bevel gear 10, and the transmission shaft 9 is away from the driving bevel gear. One end of the 10 extends toward the side close to the bed 2, and the support plate 4 adjacent to the movable plate 5 is provided with an escape opening for the transmission shaft 9 to pass through; External thread, the bottom plate 1 is rotatably installed with a threaded pipe 12 that matches the external thread of the transmission shaft 9 through the support plate; the end of the transmission shaft 9 away from the driving bevel gear 10 is fixedly installed with a slider 13, and the bottom plate 1 is also installed through the support plate. A sleeve 14 coaxially arranged with the transmission shaft 9 is rotatably installed. The sleeve 14 is provided with a sliding cavity 15 extending along its length direction. The sliding block 13 is slidably installed in the sliding cavity 15. One end is provided with a through hole for the transmission shaft 9 to pass through; the bed body 2 is provided with a linkage mechanism for driving the threaded pipe 12 to rotate or driving the threaded pipe 12 and the sleeve 14 to rotate synchronously.

Specifically, when the threaded pipe 12 rotates and the sleeve 14 does not rotate, the sleeve 14 restricts the transmission shaft 9 to follow the threaded pipe 12 to rotate through the slider 13, so that when the threaded pipe 12 rotates, the transmission shaft 9 is driven along the length direction of the bed 2 Moving, the transmission shaft 9 drives the slider 13 to slide along the sliding cavity 15, and at the same time the transmission shaft 9 drives the movable plate 5 to slide along the length direction of the bed body 2, so as to achieve the purpose of adjusting the distance between the headrest bracket 3 and the bed body 2; When the threaded pipe 12 and the sleeve 14 rotate synchronously, the sleeve 14 drives the transmission shaft 9 to rotate through the slider 13, the transmission shaft 9 drives the driven bevel gear 11 and the screw rod 7 to rotate through the driving bevel gear 10, and the screw rod 7 passes through the connecting seat. 8. Drive the lifting plate 6 to move up and down, so as to achieve the purpose of adjusting the height of the headrest bracket 3 . By flexibly adjusting the distance between the headrest bracket 3 and the bed body 2 and the height of the headrest bracket 3 , various usage needs of the patient can be met, and fatigue caused by the patient maintaining a fixed posture for a long time is avoided.

A guide rail 16 extending along the length direction of the bed 2 is fixedly installed on the base plate 1 , and the lower end of the movable plate 5 is slidably installed on the guide rail 16 to improve the sliding stability of the base plate 1 .

The side of the movable plate 5 close to the bed 2 is provided with a vertically extending guide groove 17 , and the lift plate 6 is provided with a guide block 18 matching the guide groove 17 to improve the sliding stability of the lift plate 6 .

As shown in Figure 2, Figure 3 and Figure 4, the linkage mechanism includes a rotating sleeve 19 that is rotatably mounted on the support plate 4 adjacent to the movable plate 5. The rotating sleeve 19 is arranged in parallel with the transmission shaft 9, and the rotating sleeve 19 is connected to the thread The first chain 20 is connected between the pipes 12; the bottom of the bed 2 is fixedly installed with a mounting plate 21 located between the two support plates 4, and the side of the mounting plate 21 close to the rotating sleeve 19 is rotatably installed with an adjusting shaft 22. The shaft 22 and the rotating sleeve 19 are arranged coaxially, and a second chain 23 is connected between the adjusting shaft 22 and the sleeve 14; the rotating sleeve 19 is provided with a sliding hole 24 extending along its axis, and a multi-prism is slidably installed in the sliding hole 24 One end of the adjusting shaft 22 is provided with a slot 26 into which the end of the sliding rod 25 is inserted, and one end of the sliding rod 25 away from the adjusting shaft 22 is fixedly installed with a rocker 27 .

Specifically, as shown in FIG. 3 , when the sliding rod 25 is not inserted into the slot 26 , the sliding rod 25 is driven to rotate by rotating the crank handle 27 , and then the sliding rod 25 drives the rotating sleeve 19 to rotate, and the rotating sleeve 19 passes through the first chain 20 . Drive the threaded pipe 12 to rotate, so as to achieve the purpose of adjusting the distance between the headrest bracket 3 and the bed body 2; or slide the sliding rod 25 along the sliding hole 24, so that one end of the sliding rod 25 is inserted into the slot 26, as shown in Figure 4 When the crank handle 27 is rotated, the sliding rod 25 drives the rotating sleeve 19 and the adjusting shaft 22 to rotate synchronously, the rotating sleeve 19 drives the threaded pipe 12 to rotate through the first chain 20, and the adjusting shaft 22 drives the sleeve 14 through the second chain 23. Rotate to achieve the purpose of adjusting the height of the headrest bracket 3 .

A positioning gear 28 is fixedly installed on the adjustment shaft 22, and a swinging plate 30 is hinged on the side of the mounting plate 21 close to the rotating sleeve 19 through a hinged seat 29, and the swinging plate 30 can swing up and down around the hinged seat 29. The positioning rack 31 matched with the positioning gear 28, the bed 2 and the swing plate 30 are connected with a first spring 32 that makes the positioning rack 31 mesh with the positioning gear 28; between the rotating sleeve 19 and the adjusting shaft 22 A disc 33 is fixedly installed on the sliding rod 25, the disc 33 is arranged coaxially with the adjusting shaft 22, and the bottom of one end of the swing plate 30 away from the hinge seat 29 is provided with a guiding inclined surface 34, and the guiding inclined surface 34 is facing the outer side of the disc 33. A baffle 35 is fixedly installed on the sliding rod 25 between the rotating sleeve 19 and the crank handle 27 , and a second spring 36 between the baffle 35 and the rotating sleeve 19 is sleeved on the sliding rod 25 .

When no external force acts, as shown in FIG. 3 , the second spring 36 pushes the baffle 35 and the sliding rod 25 to move to the side away from the adjusting shaft 22 , the sliding rod 25 is not inserted into the slot 26 , and the disc 33 does not contact The swinging plate 30, the first spring 32 pushes the swinging plate 30 to rotate downward and makes the positioning rack 31 mesh with the positioning gear 28, and the positioning rack 31 restricts the rotation of the positioning gear 28 and the adjusting shaft 22. At this time, the sliding rod 25 can only Drive the rotating sleeve 19 to rotate; or press the slide bar 25 to the side close to the adjusting shaft 22 to insert one end into the slot 26, while the slide bar 25 drives the disc 33 to move to the side close to the swing plate 30, when the disc 33 After the outer edge of the swing plate 30 is in contact with the guide slope 34 on the swing plate 30, the swing plate 30 is pushed up by the disc 33, so that the positioning rack 31 is separated from the positioning gear 28, as shown in FIG. 4, to release the adjustment shaft. 22, so that the rotating sleeve 19 and the adjusting shaft 22 are driven to rotate synchronously by the sliding rod 25.

As shown in FIG. 5 , the headrest bracket 3 includes a support base 37 , one end of the support base 37 away from the bed body 2 is rotatably mounted with a mounting shaft 38 extending along the length direction of the bed body 2 , and one end of the mounting shaft 38 away from the support base 37 is fixed Installed on the lifting plate 6, the end of the support seat 37 close to the bed body 2 is provided with a U-shaped groove 39, and the U-shaped groove 39 is provided with an annular headrest 40, and the annular headrest 40 is located on both sides along the width direction of the bed body 2 respectively. A small shaft 41 is fixedly installed, the small shaft 41 extends along the width direction of the bed body 2 , and the small shaft 41 is rotatably installed in the U-shaped groove 39 .

When the patient is lying on the bed body 2, the annular headrest 40 of the headrest bracket 3 can support the patient's head; the installation shaft 38 is rotatably connected with the support base 37, so that the annular headrest 40 can adapt to the patient's head Swing left and right; the annular headrest 40 is rotatably connected to the support base 37 through the small shaft 41, so that the annular headrest 40 can adapt to the front and rear swing of the patient's head, and the annular headrest 40 can be adjusted at multiple angles, so that the patient's head and neck have Larger range of motion for improved patient comfort.

The support base 37 is provided with an installation cavity 42 , the end of the small shaft 41 away from the annular headrest 40 extends into the installation cavity 42 and fixedly installs the limit gear 43 , and the installation cavity 42 is provided with two limit gears 43 in one-to-one correspondence The movable column 44 extends along the length direction of the bed body 2, the movable column 44 is sleeved with a guide sleeve 45, the guide sleeve 45 is fixedly installed on the inner wall of the installation cavity 42, and the movable column 44 is away from the end of the lifting plate 6 A limit rack 46 matching the limit gear 43 is fixedly installed; the end of the installation shaft 38 away from the lift plate 6 extends into the installation cavity 42 and a circular positioning plate 47 is fixed coaxially and fixedly installed, as shown in FIG. 6 . , the side of the positioning plate 47 close to the lifting plate 6 is provided with a plurality of clamping slots 48 evenly spaced around the axis, and a connecting plate 49 is fixedly installed between the ends of the two movable columns 44 away from the limit rack 46, and the connecting plate 49 is provided with There is an escape hole for the installation shaft 38 to pass through. The connecting plate 49 is provided with a clamping block 50 that matches the clamping slot 48. A third connecting plate 49 is connected between the side of the connecting plate 49 close to the lifting plate 6 and the inner wall of the installation cavity 42. Spring 51.

A toggle handle 52 is respectively fixed and installed on one side of the two movable columns 44 away from each other, and the support base 37 is provided with a strip hole 53 for the toggle handle 52 to pass through.

When there is no external force, the third spring 51 pushes the connecting plate 49 to move to the side close to the positioning plate 47 , and the connecting plate 49 drives the clamping block 50 to be inserted into the slot 48 aligned at this time, so that the mounting shaft 38 and the support seat 37 At the same time, the connecting plate 49 drives the movable column 44 to move to the side close to the limit gear 43, and the movable column 44 drives the limit rack 46 to mesh with the limit gear 43, so that the annular headrest 40 and the small There is no relative rotation between the shaft 41 and the support base 37 , so that the angle of the annular headrest 40 is kept fixed. Or when the angle of the annular headrest 40 needs to be adjusted, by turning the toggle handle 52 to the side away from the bed body 2 , the toggle handle 52 drives the movable column 44 to move to the side away from the limit gear 43 and causes the limit rack 46 to move. Separated from the limit gear 43, the movable column 44 drives the connecting plate 49 to move to the side away from the positioning plate 47 and makes the block 50 disengage from the groove 48, and then the support seat 37 and the annular headrest 40 can be rotated and adjusted.

The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a bed is diagnose to ophthalmology, includes bottom plate, the bed body and headrest support, there is the backup pad bottom the bed body along length direction's both ends fixed mounting respectively, the lower extreme fixed mounting of backup pad is in on the bottom plate, its characterized in that: a movable plate which is right opposite to one end of the bed body is movably arranged on the bottom plate, the movable plate can slide along the length direction of the bed body, a lifting plate is vertically and slidably arranged on one side of the movable plate, which is close to the bed body, and the headrest support is arranged on one side of the lifting plate, which is close to the bed body;

two supports are oppositely and fixedly arranged on one side of the movable plate away from the bed body from top to bottom, a vertically extending screw rod is rotatably arranged between the two supports, a connecting seat is fixedly arranged on one side of the lifting plate away from the bed body, and the connecting seat is in threaded connection with the screw rod; a transmission shaft extending along the length direction of the bed body is rotatably mounted on the movable plate, a driving bevel gear is fixedly mounted at one end of the transmission shaft, and a driven bevel gear meshed with the driving bevel gear is fixedly mounted at the lower end of the screw rod; the outer side of one end of the transmission shaft, which is far away from the driving bevel gear, is provided with an external thread, and a screwed pipe matched with the external thread of the transmission shaft is rotatably installed on the bottom plate through a supporting plate; a sliding block is fixedly arranged at one end of the transmission shaft, which is far away from the driving bevel gear, a sleeve which is coaxial with the transmission shaft is rotatably arranged on the bottom plate through a supporting plate, a sliding cavity which extends along the length direction of the sleeve is arranged in the sleeve, and the sliding block is slidably arranged in the sliding cavity; and the bed body is provided with a linkage mechanism for driving the threaded pipe to rotate or driving the threaded pipe and the sleeve to synchronously rotate.

2. The ophthalmic medical bed of claim 1, wherein: the bed body is characterized in that a guide rail extending along the length direction of the bed body is fixedly mounted on the bottom plate, and the lower end of the movable plate is slidably mounted on the guide rail.

3. The ophthalmic medical bed of claim 1, wherein: one side of the movable plate, which is close to the bed body, is provided with a vertically extending guide groove, and the lifting plate is provided with a guide block matched with the guide groove.

4. The ophthalmic medical bed of claim 1, wherein: the linkage mechanism comprises a rotating sleeve which is rotatably arranged on the supporting plate adjacent to the movable plate, the rotating sleeve is parallel to the transmission shaft, and a first chain is connected between the rotating sleeve and the threaded pipe; the bottom of the bed body is fixedly provided with a mounting plate positioned between the two support plates, one side of the mounting plate, which is close to the rotating sleeve, is rotatably provided with an adjusting shaft, the adjusting shaft and the rotating sleeve are coaxially arranged, and a second chain is connected between the adjusting shaft and the sleeve; the rotary sleeve is provided with a sliding hole extending along the axis of the rotary sleeve, a polygonal prism-shaped sliding rod is arranged in the sliding hole in a sliding mode, one end of the adjusting shaft is provided with a slot for inserting the end of the sliding rod, and a crank is fixedly arranged at one end, far away from the adjusting shaft, of the sliding rod.

5. The ophthalmic medical bed of claim 4, wherein: a positioning gear is fixedly mounted on the adjusting shaft, a swinging plate is hinged to one side, close to the rotating sleeve, of the mounting plate through a hinge seat, the swinging plate can swing up and down around the hinge seat, a positioning rack matched with the positioning gear is fixedly mounted at the bottom of the swinging plate, and a first spring which enables the positioning rack to be meshed with the positioning gear is connected between the bed body and the swinging plate; a disc is fixedly mounted on the sliding rod between the rotating sleeve and the adjusting shaft, the disc and the adjusting shaft are coaxially arranged, a guide inclined plane is arranged at the bottom of one end, far away from the hinge seat, of the oscillating plate, and the guide inclined plane is opposite to the outer edge of the disc; and a baffle is fixedly arranged on the slide bar between the rotating sleeve and the crank, and a second spring between the baffle and the rotating sleeve is sleeved on the slide bar.

6. The ophthalmic medical bed of claim 1, wherein: the headrest support includes the supporting seat, the supporting seat is kept away from the one end of the bed body is rotated and is installed the edge the installation axle that the length direction of the bed body extends, the installation axle is kept away from the one end fixed mounting of supporting seat is in on the lifter plate, the supporting seat is close to the one end of the bed body is equipped with the U-shaped groove, the U-shaped inslot is equipped with annular headrest, annular headrest is followed the width direction's of the bed body both sides fixed mounting respectively has the staff, the staff is followed the width direction of the bed body extends, the staff rotates to be installed the U-shaped inslot.

7. The ophthalmic medical bed of claim 6, wherein: an installation cavity is formed in the supporting seat, one end, far away from the annular headrest, of the small shaft extends into the installation cavity and is fixedly provided with a limiting gear, movable columns which are in one-to-one correspondence to the two limiting gears are arranged in the installation cavity, the movable columns extend along the length direction of the bed body, guide sleeves are sleeved on the movable columns, the guide sleeves are fixedly installed on the inner wall of the installation cavity, and a limiting rack matched with the limiting gear is fixedly installed at one end, far away from the lifting plate, of each movable column; the installation axle is kept away from the one end of lifter plate extends to coaxial fixed mounting has the circular shape positioning disk in the installation cavity, the positioning disk is close to one side of lifter plate is equipped with a plurality of draw-in grooves, two around the even interval of axis fixed mounting has the connecting plate between the one end of spacing rack, be equipped with the confession on the connecting plate what the installation axle passed dodges the hole, be equipped with on the connecting plate with draw-in groove assorted fixture block, the connecting plate is close to one side of lifter plate with be connected with the third spring between the inner wall of installation cavity.

8. The ophthalmic medical bed of claim 7, wherein: and one sides of the two movable columns, which are far away from each other, are respectively and fixedly provided with a shifting handle, and the supporting seat is provided with a strip-shaped hole for the shifting handle to penetrate out.

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