CN109009694A - A kind of scoop stretcher for the adjustable length that medical field uses - Google Patents

Abstract

The invention belongs to the technical field of stretchers, and in particular relates to a length-adjustable shovel stretcher used in the medical field. When using the stretcher designed by the present invention, first put the patient in the middle of the mounting bracket, then adjust the adjusting rod to rotate counterclockwise, the adjusting rod will drive the rotation of the telescopic shaft, and the rotation of the driving telescopic shaft will make the eight shovels merge, and at this time The stretcher can be lifted; after the use is completed, the medical staff adjust the adjustment lever so that the blade moves to the outside of the installation frame along the corresponding first arc-shaped guide groove and the second arc-shaped guide groove opened on the installation frame; finally restore to the original position; it can be used next time; the fixed frame of the shovel stretcher designed by the present invention is integrated, which increases the stability of the shovel stretcher; avoiding the traditional folding shovel stretcher, because it is easy to be damaged , which may cause secondary harm to the patient.

Description

A scoop-type stretcher with adjustable length used in the medical field

technical field

The invention belongs to the technical field of stretchers, in particular to a length-adjustable scoop stretcher used in the medical field.

Background technique

With the development of science and technology, people's lives are becoming more and more prosperous. At the same time, medical equipment is also constantly improving. Medical equipment finds its shortcomings and shortcomings in the process of use, and then improves and innovates it to better meet people's needs. Demand, more convenient and faster to use.

Stretcher is one of the common equipment in medical equipment. When the patient cannot walk on his own, suffers from serious internal injuries, fractures, etc. and cannot violently vibrate or move, it is often necessary to use a stretcher to move the patient. The shovel stretcher consists of two shovels on the left and right. slice composition. Different from ordinary stretchers, it can respectively insert two spatulas under the patient's body and lift them up after buckling. Minimize the secondary injury caused to the patient during the handling process. However, since the general shovel stretcher is composed of two shovels on the left and right, during use, the pressure that the two shovels can withstand is relatively small, and the frame of the shovel stretcher is generally foldable, which is easy to be damaged. Just may cause secondary injury to patient; So design a kind of comparatively strong scoop stretcher is very necessary.

The present invention designs a length-adjustable scoop stretcher used in the medical field to solve the above problems.

Contents of the invention

In order to solve the above-mentioned defects in the prior art, the present invention discloses a length-adjustable scoop stretcher used in the medical field, which is realized by adopting the following technical solutions.

A shovel stretcher with adjustable length used in the medical field is characterized in that it includes a stretcher handle, a shovel, a mounting frame, an adjustment rod, a drive telescopic shaft, a one-way support mechanism, a drive gear, a first support, and a connecting shaft , fixed support, transmission gear, first arc-shaped guide groove, installation groove, square block, square groove, third support, telescopic hole, second arc-shaped guide groove, driving groove, wherein the mounting frame is composed of telescopic inner mounting frame and telescopic The telescopic outer mounting frame is composed of a first mounting block and a telescopic outer rod. The two telescopic outer rods are symmetrically installed at both ends of one side of the first mounting block; Arc-shaped guide groove, telescopic holes are opened on the two telescopic outer rods, and the two telescopic holes are respectively matched with the corresponding first arc-shaped guide groove; there is a through installation groove on the side of the second installation block; the telescopic inner installation The frame is composed of a second installation block and a telescopic inner rod, and the two telescopic inner rods are symmetrically installed at both ends of one side of the second installation block; there are second arc-shaped guide grooves on the two telescopic inner rods, and the telescopic inner rods are installed The frame is installed on the telescopic outer mounting frame through the cooperation of the two telescopic inner rods and the telescopic holes opened on the two telescopic outer rods on the telescopic outer mounting frame; Cooperate with the first arc-shaped guide groove opened on the telescopic outer rod; the four stretcher handles are symmetrically installed on the two ends of the first installation block and the second installation block in pairs, and the two stretcher handles in the same group Symmetrical to each other on the mount.

The structures installed on both sides of the mounting frame are identical and symmetrical to each other. For any one of the structures installed on both sides of the mounting frame, a square block is installed at one end of the drive telescopic shaft; the drive telescopic shaft is supported by two third supports. Installed on the side of the installation frame, the one-way support mechanism is installed on the side of the end with the installation groove on the installation frame; the square block installed on the drive telescopic shaft cooperates with the one-way support mechanism; the four drive gears pass through the key and keyway. Fit evenly on the drive telescopic shaft, the four drive gears are slidingly fitted with the drive telescopic shaft; the shovel is in the shape of an arc, and the outer arc surface of the shovel is provided with a drive slot, and the arc surface of the drive slot has teeth teeth; the four shovels are evenly installed on the mounting frame by cooperating with the corresponding first arc-shaped guide groove and the second arc-shaped guide groove on the mounting frame respectively; the four shovel blades are respectively connected to the four The four driving gears are engaged with the driving slots on the corresponding shovel blades; one end of the transmission gear is a bevel end, and the other end is a smooth end. The installation groove; the smooth end of the transmission gear is installed on the installation frame through a fixed support; the adjustment rod is installed on one end of the drive telescopic shaft, and is close to the transmission gear.

Both ends of the connecting shaft have bevel teeth; the connecting shaft is installed in the installation groove opened on the mounting bracket through the first support; engage.

The above-mentioned one-way support mechanism includes a square groove, one-way inner ring, one-way outer ring, and second support, wherein the one-way outer ring and one-way inner ring form a one-way ring, and the one-way ring is installed on the On the mounting frame; the one-way inner ring is provided with a square groove; the square groove on the one-way inner ring is matched with the square block installed on the drive shaft; the square groove on the one-way inner ring is matched with the drive shaft.

As a further improvement of the present technology, the above-mentioned one-way outer ring is fixedly installed on the second support by means of welding.

As a further improvement of the present technology, the above-mentioned square block is in a square shape, and the width of the square block is equal to the width of the square groove opened on the unidirectional inner ring.

As a further improvement of the technology, the diameter of the inscribed circle of the square groove opened on the one-way inner ring is equal to the diameter of the drive telescopic shaft.

As a further improvement of the technology, the transmission gear is mounted on a fixed support through a bearing.

In the present invention, four stretcher handles are symmetrically installed on two ends of the mounting frame in pairs; the function of the stretcher handles is to drive the stretcher through the stretcher handles for medical staff.

Both ends of the connecting shaft in the present invention have bevel teeth; the connecting shaft is installed in the installation groove opened on the mounting frame through the first support; The bevel gear ends mesh; when one of the two transmission gears rotates, the transmission gear will drive the connecting shaft to rotate; the rotation of the connecting shaft will drive the other transmission gear to rotate; the rotation of the other transmission gear will drive the corresponding driving telescopic shaft to rotate.

In the present invention, a square block is installed at one end of the drive telescopic shaft; the drive telescopic shaft is installed on the side of the mounting frame through two third supports, and the one-way support mechanism is mounted on the side of one end of the mounting frame with a mounting groove; the drive telescopic The square block installed on the shaft cooperates with the one-way support mechanism; the four driving gears are evenly installed on the driving telescopic shaft through the cooperation of the key and the keyway, and the four driving gears are slidingly matched with the driving telescopic shaft; the shovel is Arc shape, there is a drive groove on the outer arc surface of the blade, and there are teeth on the arc surface of the drive groove; the four blades respectively pass through the first arc guide groove and the second arc guide groove corresponding to the mounting bracket The fit is evenly installed on the mounting frame; the four shovels mesh with the four driving gears through the teeth on them respectively; the four driving gears cooperate with the driving grooves on the corresponding shovels; one end of the transmission gear is a bevel tooth end, The other end is a smooth end, and the transmission gear is installed on the drive telescopic shaft, and is close to the installation groove opened on the installation frame; the smooth end of the transmission gear is installed on the installation frame through a fixed support; the adjustment rod is installed on one end of the drive telescopic shaft, And close to the transmission gear; the one-way outer ring and the one-way inner ring form a one-way ring, and the one-way ring is installed on the mounting frame through the second support; the one-way inner ring has a square groove; the one-way inner ring is installed On the inner side of the one-way outer ring; the square groove on the one-way inner ring cooperates with the square block installed on the drive telescopic shaft; the square groove on the one-way inner ring cooperates with the drive telescopic shaft; when the one-way inner ring When the square groove and the square block installed on the driving telescopic shaft are in a mating state, the medical staff adjusts the adjusting rod to rotate counterclockwise, and the adjusting rod will drive the driving telescopic shaft to rotate, and the driving telescopic shaft will drive the corresponding four driving gears to rotate; The rotation of the driving gear will make the corresponding four blades move to the inside of the mounting frame along the corresponding first arc-shaped guide groove and the second arc-shaped guide groove opened on the mounting frame; when the eight blades just merge ;In this state, the one-way outer ring acts as a limit to the corresponding one-way inner ring to prevent the one-way inner ring from rotating in reverse; the one-way inner ring will not rotate in reverse, that is, the drive telescopic shaft will not The drive telescopic shaft will not rotate in the opposite direction, that is, the drive gear will not rotate in the opposite direction, that is, the blade will not move in the reverse direction when the blade is squeezed; prevent the patient from falling due to the reverse movement of the blade, Aggravate the patient's condition; after the use is completed, the medical staff pull the adjustment rod so that the adjustment rod drives the drive telescopic shaft to move; the drive telescopic shaft moves to drive the square block mounted on it to move, and finally makes the square block installed on the drive telescopic shaft and Correspondingly, the square groove opened on the inner ring of the drive is disengaged. At this time, the reverse rotation of the adjustment rod causes the adjustment rod to drive the drive telescopic shaft to reverse rotation; the reverse rotation of the drive telescopic shaft drives the corresponding four drive gears to reverse rotation; the four drive gears The reverse rotation of the gear will make the corresponding four blades move to the outside of the mounting frame along the corresponding first arc-shaped guide groove and the second arc-shaped guide groove opened on the mounting frame; finally return to the original position In the present invention, the four driving gears are evenly installed on the driving telescopic shaft through the cooperation of the key and the keyway, and the four driving gears and the driving telescopic shaft are slidingly fitted; the connecting driving gear and the driving extension The key and keyway of the shrink shaft can ensure that the drive gear will not interfere with the drive telescopic shaft during movement.

In the present invention, the mounting frame can be stretched, and the height of the patient can be adapted by adjusting the expansion and contraction of the mounting frame; during the adjustment process of the mounting frame, the four shovels on the same side will move closer in turn; The function of the shovel; the function of the drive slot on the shovel in the present invention is that when the mounting frame is stretched, the shovel can drive the corresponding 8 to move through the drive slot; Detachment; the mounting frame can be manually restored to its original state after use, and the eight blades can also be manually restored to their original positions.

Compared with the traditional stretcher technology, the shovel stretcher designed by the present invention is lifted by inserting eight shovel blades under the patient's body. Minimize the secondary injury caused to the patient during the transportation process; at the same time, the fixed frame of the scoop stretcher designed by the present invention is integrated, which increases the stability of the scoop stretcher; avoids the traditional folding scoop stretcher , because it is easy to be destroyed, which may cause secondary harm to the patient.

Description of drawings

Figure 1 is a schematic diagram of the appearance of the overall components.

Figure 2 is a schematic diagram of the distribution of the overall components.

Fig. 3 is a schematic plan view of the distribution of the overall components.

Fig. 4 is a schematic diagram of the distribution of driving gears.

Figure 5 is a schematic diagram of the installation of the connecting shaft.

Fig. 6 is a schematic diagram of the structure of the mounting frame.

Fig. 7 is a schematic diagram of the structure of the telescopic outer mounting frame.

Fig. 8 is a structural schematic diagram of the telescopic inner mounting frame.

Fig. 9 is a schematic diagram of cooperation between the transmission gear and the connecting shaft.

Fig. 10 is a schematic diagram of cooperation between the transmission gear and the fixed support.

Fig. 11 is a schematic diagram of cooperation between the shovel and the driving gear.

Figure 12 is a schematic diagram of the drive gear installation.

Fig. 13 is a schematic diagram of the structure of the one-way support mechanism.

Label names in the figure: 1. Stretcher handle; 2. Shovel blade; 3. Mounting frame; 4. Adjusting rod; 5. Driving telescopic shaft; 6. One-way support mechanism; 7. Driving gear; 8. First support; 10. Fixed support; 11. Transmission gear; 12. First arc-shaped guide groove; 13. Installation groove; 15. Square block; 16. Square groove; 17. One-way inner ring; 18. One-way outer Ring; 19, second support; 20, third support; 21, telescopic inner mounting frame; 22, telescopic outer mounting frame; 23, telescopic hole; 24, first mounting block; 26, telescopic outer rod; 27, telescopic inner Rod; 28, the second mounting block; 29, the second arc guide groove; 30, the driving groove.

Detailed ways

As shown in Figures 1 and 2, it includes a stretcher handle 1, a shovel 2, a mounting frame 3, an adjustment rod 4, a drive telescopic shaft 5, a one-way support mechanism 6, a drive gear 7, a first support 8, a connecting shaft 9, Fixed support 10, transmission gear 11, first arc-shaped guide groove 12, mounting groove 13, square block 15, square groove 16, third support 20, telescopic hole 23, second arc-shaped guide groove 29, driving groove 30, wherein As shown in Figure 6, the mounting frame 3 is made up of a telescopic internal mounting frame 21 and a telescopic external mounting frame 22. The outer rods 26 are symmetrically installed at both ends of one side of the first mounting block 24; the two telescopic outer rods 26 are provided with first arc-shaped guide grooves 12, and the two telescopic outer rods 26 are provided with telescopic holes 23, Two telescopic holes 23 cooperate with corresponding first arc-shaped guide grooves 12 respectively; On the side of the second mounting block 28, there are through mounting grooves 13; 28 and telescopic inner rod 27 are formed, and two telescopic inner rods 27 are symmetrically installed on the two ends of the second mounting block 28 side; Both telescopic inner rods 27 are provided with a second arc-shaped guide groove 29, which is installed in the telescopic The frame 21 is installed on the telescopic outer mounting frame 22 through the cooperation of the two telescopic inner rods 27 and the telescopic holes 23 opened on the two telescopic outer rods 26 on the telescopic outer mounting frame 22; The arc-shaped guide grooves 29 cooperate with the first arc-shaped guide grooves 12 opened on the corresponding telescopic outer rods 26; as shown in Figure 6, the four stretcher handles 1 are symmetrically installed on the first mounting block 24 and the two ends of the second mounting block 28 , the two stretcher handles 1 in the same group are symmetrical to each other on the mounting frame 3 .

As shown in Figures 3 and 4, the structures installed on both sides of the mounting frame 3 are identical and symmetrical to each other. For any one of the structures installed on both sides of the mounting frame 3, as shown in Figure 12, the drive telescopic shaft 5 A square block 15 is installed at one end of the top; as shown in Figure 4, the drive telescopic shaft 5 is installed on the side of the mounting frame 3 through two third supports 20, as shown in Figures 4 and 5, the one-way support mechanism 6 is installed on the installation The side of one end of the mounting groove 13 is opened on the frame 3; the square block 15 installed on the driving telescopic shaft 5 cooperates with the one-way support mechanism 6; as shown in Figure 12, the four driving gears 7 are evenly matched by the key and the keyway It is installed on the driving telescopic shaft 5, and the four driving gears 7 are slidingly fitted with the driving telescopic shaft 5; the shovel blade 2 is arc-shaped, as shown in Figure 11, and the outer arc surface of the shovel blade 2 has a driving groove 30. There are teeth on the arc surface of the driving groove 30; Evenly installed on the mounting frame 3; as shown in Figure 11, the four shovel blades 2 mesh with the four drive gears 7 through the teeth on them respectively; Cooperate; as shown in Figure 9, one end of the transmission gear 11 is a bevel tooth end, and the other end is a smooth end, as shown in Figure 5, the transmission gear 11 is installed on the drive telescopic shaft 5, and is close to the opening on the mounting bracket 3 Mounting groove 13; As shown in Figure 3,10, the smooth end of transmission gear 11 is installed on the mounting bracket 3 by fixed support 10;

As shown in Figure 9, both ends of the connecting shaft 9 have bevel teeth; as shown in Figure 2, the connecting shaft 9 is installed in the mounting groove 13 opened on the mounting bracket 3 through the first support 8; as shown in Figure 9 , the two ends of the connecting shaft 9 mesh with the corresponding bevel gear ends on the transmission gear 11 through the bevel teeth thereon.

As shown in Figure 13, the above-mentioned unidirectional support mechanism 6 includes a square groove 16, a unidirectional inner ring 17, a unidirectional outer ring 18, and a second support 19, wherein as shown in Figure 13, the unidirectional outer ring 18 and the unidirectional inner The ring 17 forms a one-way ring, which is installed on the mounting frame 3 through the second support 19; the one-way inner ring 17 has a square groove 16; the one-way inner ring 17 is installed on the inner side of the one-way outer ring 18 ; As shown in Figure 5, the square groove 16 on the one-way inner ring 17 cooperates with the square block 15 installed on the drive shaft 5;

The one-way outer ring 18 is fixedly installed on the second support 19 by welding.

Above-mentioned square piece 15 is square shape, and the width of square piece 15 is equal to the width of the square groove 16 that opens on the one-way inner ring 17.

The diameter value of the inscribed circle of the square groove 16 opened on the above-mentioned one-way inner ring 17 is equal to the diameter value of the drive telescopic shaft 5 .

The above-mentioned transmission gear 11 is installed on the fixed support 10 through bearings.

In summary:

The shovel stretcher designed by the present invention lifts then by inserting eight shovel blades 2 under the patient's body. Minimize the secondary injury caused to the patient during the transportation process; at the same time, the fixed frame of the scoop stretcher designed by the present invention is integrated, which increases the stability of the scoop stretcher; avoids the traditional folding scoop stretcher , because it is easy to be destroyed, which may cause secondary harm to the patient.

In the present invention, four stretcher handles 1 are symmetrically installed on the two ends of the mounting frame 3 in groups of two;

In the present invention, both ends of the connecting shaft 9 have bevel teeth; the connecting shaft 9 is installed in the mounting groove 13 opened on the mounting frame 3 through the first support 8; The bevel gear ends on the corresponding transmission gear 11 mesh; when one of the transmission gears 11 in the two transmission gears 11 rotates, the transmission gear 11 will drive the connecting shaft 9 to rotate; the rotation of the connecting shaft 9 drives the other transmission gear 11 to rotate; The rotation of the other transmission gear 11 drives the corresponding driving telescopic shaft 5 to rotate.

In the present invention, a square block 15 is installed on one end of the drive telescopic shaft 5; the drive telescopic shaft 5 is installed on the side of the mounting frame 3 through two third supports 20, and the one-way support mechanism 6 is installed on the mounting frame 3 with a mounting groove The side of one end of 13; the installed square block 15 on the drive telescopic shaft 5 cooperates with the one-way support mechanism 6; 7 is a sliding fit with the drive telescopic shaft 5; the shovel blade 2 is arc-shaped, and the outer arc surface of the shovel blade 2 is provided with a drive groove 30, and the arc surface of the drive groove 30 has teeth; the four shovel blades 2 are respectively By cooperating with the corresponding first arc-shaped guide groove 12 and the second arc-shaped guide groove 29 on the mounting frame 3, it is evenly installed on the mounting frame 3; The gears 7 mesh; the four driving gears 7 cooperate with the driving slots 30 on the corresponding shovel blades 2; one end of the transmission gear 11 is a bevel tooth end, and the other end is a smooth end, and the transmission gear 11 is installed on the drive telescopic shaft 5, and close to The mounting groove 13 opened on the mounting frame 3; the smooth end of the transmission gear 11 is installed on the mounting frame 3 through the fixed support 10; the adjustment rod 4 is installed on one end of the driving telescopic shaft 5, and is close to the transmission gear 11; the one-way outer ring 18 and one-way inner ring 17 form a one-way ring, and this one-way ring is installed on the mounting frame 3 through the second support 19; There is a square groove 16 on the one-way inner ring 17; The square groove 16 on the one-way inner ring 17 Groove 16 cooperates with the square block 15 that is installed on the drive telescopic shaft 5; The square groove 16 on the one-way inner ring 17 cooperates with the drive telescopic shaft 5; When the square block 15 on the telescopic shaft 5 is in a mating state, the medical staff adjusts the adjusting rod 4 to rotate counterclockwise, the adjusting rod 4 will drive the telescopic shaft 5 to rotate, and the driven telescopic shaft 5 will rotate to drive the corresponding four driving gears 7 to rotate; The rotation of the two driving gears 7 will make the corresponding four shovel blades 2 move to the inside of the mounting frame 3 along the corresponding first arc-shaped guide groove 12 and the second arc-shaped guide groove 29 opened on the mounting frame 3; When the eight shovel blades 2 just merge; in this state, the one-way outer ring 18 plays a limiting role on the corresponding one-way inner ring 17 to prevent the one-way inner ring 17 from rotating in reverse; the one-way inner ring 17 does not It will rotate in reverse, that is, the drive telescopic shaft 5 will not rotate in reverse; the drive telescopic shaft 5 will not rotate in reverse, that is, the drive gear 7 will not rotate in reverse, that is, when the shovel 2 is squeezed, the shovel 2 will not rotate It will move in the opposite direction; prevent the patient from falling due to the reverse movement of the shovel 2, and aggravate the patient's condition; after the use is completed, the medical staff pulls the adjustment rod 4 so that the adjustment rod 4 drives the drive telescopic shaft 5 to move; drives the telescopic shaft 5 to move Drive the square block 15 installed on it to move, and finally make the square block 15 installed on the drive telescopic shaft 5 disengage from the square groove 16 opened on the corresponding drive inner ring. Drive the drive telescopic shaft 5 to rotate in reverse; drive the telescopic shaft 5 to rotate in reverse to drive the corresponding four drive gears 7 to rotate in reverse; the four drive gears 7 to rotate in reverse will make The corresponding four blades 2 move to the outside of the mounting frame 3 along the corresponding first arc-shaped guide groove 12 and the second arc-shaped guide groove 29 opened on the mounting frame 3; finally return to the original position; In the invention, the four driving gears 7 are evenly installed on the driving telescopic shaft 5 through the cooperation of the key and the keyway, and the four driving gears 7 and the driving telescopic shaft 5 are slidingly fitted; the key connecting the driving gear 7 and the driving telescopic shaft 5 The keyway and the keyway can ensure that the drive gear 7 will not interfere with the internal and external telescopic structures of the drive telescopic shaft 5 during the movement process.

In the present invention, the mounting frame 3 can be telescopically adapted to the height of the patient by adjusting the expansion and contraction of the mounting frame 3; during the adjustment process of the mounting frame 3, the four shovel blades 2 on the same side will move closer in turn; that is, the mounting frame 3 The effect of the blade 2 will not be affected when stretching; the function of the driving groove 30 opened on the blade 2 in the present invention is that when the mounting frame 3 is stretched, the blade 2 can drive the corresponding driving gear 7 to move through the driving groove 30 The shovel 2 will not be disengaged from the drive gear 7 due to the movement of the shovel 2; the mounting frame 3 can be manually restored to its original state after use, and the eight shovels 2 can also be manually restored to their original positions.

Specific implementation method: when using the stretcher designed by the present invention, first put the patient in the middle of the mounting frame 3, then adjust the adjustment rod 4 to rotate counterclockwise, the adjustment rod 4 will drive the rotation of the telescopic shaft 5, and the rotation of the telescopic shaft 5 will drive the corresponding The four drive gears 7 rotate; the rotation of the four drive gears 7 will make the corresponding four shovel blades 2 follow the corresponding first arc-shaped guide groove 12 and the second arc-shaped guide groove 29 opened on the mounting bracket 3 Move to the inside of the mounting frame 3; when the four shovels 2 are just merged, the stretcher can be lifted; after the use is completed, the medical staff pulls the adjustment rod 4 so that the adjustment rod 4 drives the drive telescopic shaft 5 to move; the drive telescopic shaft 5 The movement drives the square block 15 installed on it to move, and finally the square block 15 installed on the drive telescopic shaft 5 is separated from the square groove 16 opened on the corresponding drive inner ring. At this time, the reverse rotation of the adjustment rod 4 makes the adjustment rod 4 Drive the drive telescopic shaft 5 to rotate in reverse; drive the telescopic shaft 5 to rotate in reverse to drive the corresponding four drive gears 7 to rotate in reverse; The corresponding first arc-shaped guide groove 12 and the second arc-shaped guide groove 29 opened on the frame 3 move to the outside of the mounting frame 3; finally return to the original position; it can continue to be used next time.

Claims (5)

1. A shovel stretcher with adjustable length used in the medical field, characterized in that it includes a stretcher handle, a shovel, a mounting frame, an adjustment rod, a drive telescopic shaft, a one-way support mechanism, a drive gear, a first support, Connecting shaft, fixed support, transmission gear, first arc-shaped guide groove, installation groove, square block, square groove, third support, telescopic hole, second arc-shaped guide groove, drive groove, wherein the installation frame is composed of telescopic inner installation frame It is composed of a telescopic outer mounting frame. The telescopic outer mounting frame is composed of a first mounting block and a telescopic outer rod. The two telescopic outer rods are symmetrically installed at both ends of one side of the first mounting block; The first arc-shaped guide groove, telescopic holes are opened on the two telescopic outer rods, and the two telescopic holes are respectively matched with the corresponding first arc-shaped guide groove; the side of the second installation block is provided with a through installation groove; The inner mounting frame is composed of a second mounting block and a telescopic inner rod, and the two telescopic inner rods are symmetrically installed at both ends of one side of the second mounting block; both telescopic inner rods are provided with a second arc-shaped guide groove, and the telescopic inner rods The inner mounting frame is installed on the telescopic outer mounting frame through the cooperation of the two telescopic inner rods and the telescopic holes opened on the two telescopic outer rods on the telescopic outer mounting frame; the second arc-shaped guide grooves on the two telescopic inner rods are respectively Cooperate with the first arc-shaped guide groove opened on the corresponding telescopic outer rod; the four stretcher handles are symmetrically installed on the two ends of the first installation block and the second installation block in pairs, and are located on the two ends of the same group. Stretcher handles are symmetrical to each other on the mounting frame; The structures installed on both sides of the mounting frame are identical and symmetrical to each other. For any one of the structures installed on both sides of the mounting frame, a square block is installed at one end of the drive telescopic shaft; the drive telescopic shaft is supported by two third supports. Installed on the side of the installation frame, the one-way support mechanism is installed on the side of the end with the installation groove on the installation frame; the square block installed on the drive telescopic shaft cooperates with the one-way support mechanism; the four drive gears pass through the key and keyway. Fit evenly on the drive telescopic shaft, the four drive gears are slidingly fitted with the drive telescopic shaft; the shovel is in the shape of an arc, and the outer arc surface of the shovel is provided with a drive slot, and the arc surface of the drive slot has teeth teeth; the four shovels are evenly installed on the mounting frame by cooperating with the corresponding first arc-shaped guide groove and the second arc-shaped guide groove on the mounting frame respectively; the four shovel blades are respectively connected to the four The four driving gears are engaged with the driving slots on the corresponding shovel blades; one end of the transmission gear is a bevel end, and the other end is a smooth end. The installation groove; the smooth end of the transmission gear is installed on the installation frame through a fixed support; the adjustment rod is installed on one end of the driving telescopic shaft, and is close to the transmission gear; Both ends of the connecting shaft have bevel teeth; the connecting shaft is installed in the installation groove opened on the mounting bracket through the first support; Engage; The above-mentioned one-way support mechanism includes a square groove, one-way inner ring, one-way outer ring, and second support, wherein the one-way outer ring and one-way inner ring form a one-way ring, and the one-way ring is installed on the On the mounting frame; the one-way inner ring is provided with a square groove; the square groove on the one-way inner ring is matched with the square block installed on the drive shaft; the square groove on the one-way inner ring is matched with the drive shaft. 2. The length-adjustable scoop stretcher used in the medical field according to claim 1, wherein the one-way outer ring is fixedly installed on the second support by welding. 3. The adjustable-length shovel stretcher used in the medical field according to claim 1, characterized in that: the above-mentioned square block is a square shape, and the width of the square block is equal to that of the square groove opened on the one-way inner ring. equal in width. 4. A scoop-type stretcher with adjustable length used in the medical field according to claim 1, characterized in that: the diameter of the inscribed circle of the square groove opened on the one-way inner ring is the same as the diameter of the drive telescopic shaft The diameter values are equal. 5 . The adjustable-length scoop stretcher used in the medical field according to claim 1 , wherein the transmission gear is mounted on a fixed support through a bearing. 6 .