Sectional type thyroid surgery pillow

Abstract

The utility model relates to the technical field of operation pillows, in particular to a sectional type thyroid operation pillow which comprises four U-shaped frames, a head fixing device, a neck supporting device, a shoulder and back supporting device and a knee supporting device, every two U-shaped frames are oppositely arranged in a left-right mode, fixing blocks are fixedly connected to the top faces of the U-shaped frames, and the top faces of the U-shaped frames are fixedly connected with the head fixing device and the neck supporting device. Sliding rods are fixedly connected to the middles of the front end faces of the two fixing blocks on the rear side, a head fixing device is fixedly connected between the two U-shaped frames on the rear side, a neck supporting device and a shoulder and back supporting device are sequentially installed between the two sliding rods in a sliding mode, and a knee supporting device is fixedly connected between the two U-shaped frames on the front side. The multi-functional pillow is reasonable in structural design, integrates a plurality of functional pillows into a whole, is arranged in sections, can be adjusted in sections according to the height and the body shape of a patient, can be conveniently adjusted to enable the head to lean backwards and be fixedly supported, and is simple and convenient to use, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical pillows, in particular to a segmented thyroid surgical pillow. Background Art

[0002] Thyroid diseases are mainly divided into two categories: thyroid diseases treated by internal medicine and thyroid diseases treated by surgery. Thyroid diseases treated by internal medicine mainly include hyperthyroidism (commonly known as hyperthyroidism) and thyroid inflammation (including acute, subacute and chronic thyroid inflammation). Thyroid diseases treated by surgery include goiter and thyroid tumors. The main difference between the two is that thyroid function tests of thyroid diseases treated by internal medicine are abnormal, while thyroid function tests of thyroid diseases treated by surgery are normal. However, the two are not absolutely isolated, and they can also transform into each other, especially medical thyroid diseases may also require surgical treatment.

[0003] Thyroid surgery is a type of cervical surgery. The commonly used surgical positions are to raise the shoulders and back, lift the neck, and tilt the head back at a certain angle to fully expose the surgical field of view. At the same time, a soft pillow is placed under the knees and the knee joints are fixed with a strap. Multiple surgical pillows are needed to support and fix the patient, and they are very inconvenient to use and adjust.

[0004] In summary, in order to solve the above-mentioned technical problems, the present technical scheme provides a segmented thyroid surgery pillow. The utility model has a reasonable structural design, combines multiple functional pillows into one, and arranges them in segments. It can be adjusted in segments according to the patient's height and body shape. The head can be conveniently adjusted to tilt back and provide fixed support. It is simple and convenient to use, saving time and effort. Utility Model Content

[0005] The purpose of the utility model is to provide a segmented thyroid surgery pillow to overcome the above technical shortcomings. Multiple functional pillows are combined into one and arranged in segments, which can be adjusted in segments according to the height and body shape of the patient. The head can be easily adjusted to tilt back and provide fixed support. It is simple and convenient to use, saving time and effort.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a segmented thyroid surgery pillow, including a U-shaped frame, a head fixing device, a neck supporting device, a shoulder and back supporting device, and a knee supporting device, wherein the U-shaped frames are provided with four and are arranged opposite to each other in pairs, the bottom of the U-shaped frames are all screwed and fixed with annular bolts, the top surface of the U-shaped frames are fixedly connected with fixing blocks, the middle parts of the front end surfaces of the two fixing blocks on the rear side are fixedly connected with sliding rods, the front ends of the sliding rods are slid through the fixing blocks on the front side, and the head fixing device is fixedly connected between the two U-shaped frames on the rear side, and the head fixing device includes a connecting plate A, a head support plate, a head support pad, an extension plate, a telescopic rod, a transverse A sliding cylinder, an L-shaped rod, a lower pressure plate, and a lower pressure pad, a neck support device and a shoulder and back support device are slidably installed between the two sliding rods in sequence, the neck support device includes an L-shaped plate A, a neck adjustment sliding cylinder, a neck base plate, a neck support plate, a neck support pad, a U-shaped rod, a fixed sleeve, a limiting sliding cylinder, a lifting threaded cylinder, a connecting rod, a limiting sliding rod, a lifting screw, and a lifting connecting rod, the shoulder and back support device includes an L-shaped plate B, a shoulder and back adjustment sliding cylinder, a shoulder and back base plate, and a shoulder and back base pad, a knee support device is fixedly connected between the two U-shaped frames on the front side, the knee support device includes a knee base plate, a connecting plate B, a spacer plate, an outer guard plate, a belt frame, a fixing belt, a knee support plate, a knee support pad, an adjustment screw, and a limiting plug rod.

[0007] Furthermore, two connecting plates A are symmetrically fixedly connected at both ends of the head support plate, and the other ends of the connecting plates A are connected to the upper outer wall of the U-shaped frame. The top surface of the head support plate is concave under the arc line and a layer of head support pad is fixed thereon. An extension plate is fixedly connected to the rear outer wall of the head support plate, and a telescopic rod is fixedly connected to the top surface of the extension plate. The telescopic part of the telescopic rod is screwed and fixed by locking bolts. The top of the telescopic rod is fixedly connected to a transverse sliding cylinder, and an L-shaped rod is slidably inserted in the transverse sliding cylinder and screwed and fixed by locking bolts. The lower end of the L-shaped rod is fixedly connected to a lower pressure plate, and a layer of lower pressure pad is fixed on the bottom surface of the lower pressure plate.

[0008] The two ends of the neck base plate are symmetrically fixedly connected with two L-shaped plates A, and the other ends of the L-shaped plates A are fixedly connected with a neck adjusting slide cylinder, and the neck adjusting slide cylinder is slidably sleeved on the slide rod and screwed and fixed by locking bolts. The top surface of the neck base plate is fixedly connected with a U-shaped rod, and two fixing sleeves are symmetrically fixedly connected to the U-shaped rod. The upper side of the neck base plate is provided with a semi-cylindrical neck support plate, and a neck support pad is fixed on the top surface of the neck support plate. A limiting sliding rod is fixedly connected to the upper side between the two ends of the neck support plate, and two limiting sliding cylinders are symmetrically slidably sleeved on the limiting sliding rod, and a lifting screw is screwed on the lower side between the two ends of the neck support plate, and two lifting threaded cylinders are symmetrically screwed on the lifting screw, and the internal threads of the two lifting threaded cylinders are opposite. A connecting rod is fixedly connected between the limiting sliding cylinder and the lifting threaded cylinder that are close to each other up and down, and a lifting connecting rod is hinged between the lifting threaded cylinder and the fixing sleeve that are close to each other up and down through a hinge shaft.

[0009] Furthermore, the cross-section of the shoulder and back base plate is triangular and a shoulder and back base pad is fixed on the top surface thereof, and two L-shaped plates B are symmetrically fixedly connected to the two ends of the shoulder and back base plate, and the other ends of the L-shaped plates B are fixedly connected to shoulder and back adjustment slides, and the shoulder and back adjustment slides are slidably sleeved on the slide rod and screwed and fixed by locking bolts.

[0010] Furthermore, two connecting plates B are symmetrically fixedly connected at both ends of the knee base plate, and the other ends of the connecting plates B are fixedly connected to the U-shaped frame. A partition plate is arranged just above the middle of the knee base plate, and outer guard plates are symmetrically arranged on both sides of the partition plate. Semi-cylindrical knee support plates are fixedly connected between the partition plate and the outer guard plate, and a semi-circular knee support pad is fixedly connected to the knee support plate. Fixing belts are fixedly connected at the edge of the two end plates on the top surface of the partition plate, and the ends of the fixing belts are fixedly connected with an adhesive hook surface and an adhesive rough surface, and the edges of the top panel of the outer guard plate are fixedly connected with a belt frame, and two limit rods are symmetrically fixedly connected on the front and rear sides of the middle part of the top surface of the knee base plate, and the limit rods are slidably inserted on the partition plate, and an adjusting screw is rotatably connected to the center of the top surface of the knee base plate through a bearing, and the adjusting screw is threadedly inserted on the partition plate.

[0011] The beneficial effects of the utility model are: the utility model has a reasonable structural design, combines multiple functional pillows into one, and is arranged in sections, which can be adjusted in sections according to the height and body shape of the patient, and can be conveniently adjusted to tilt the head back and provide fixed support, which is simple and convenient to use, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural schematic diagram of the utility model.

[0013] Attached Figure 2 It is a schematic structural diagram of the head fixing device of the utility model.

[0014] Attached Figure 3 This is a schematic structural diagram of the neck support device of the present utility model.

[0015] Attached Figure 4 It is a schematic diagram of the exploded structure of the neck support device of the present utility model.

[0016] Attached Figure 5 It is a schematic structural diagram of the shoulder and back support device of the utility model.

[0017] Attached Figure 6 This is a schematic structural diagram of the knee support device of the present utility model.

[0018] Attached Figure 7 It is a schematic diagram of the exploded structure of the knee support device of the present utility model. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following is combined with Figure 1 to Figure 7 The utility model is described in detail below.

[0023] like Figures 1 to 7As shown, the utility model comprises a U-shaped frame 1, a head fixing device 5, a neck supporting device 6, a shoulder and back supporting device 7, and a knee supporting device 8. The U-shaped frame 1 is provided with four and two of them are arranged opposite to each other on the left and right sides. The bottom of the U-shaped frame 1 is screwed and fixed with an annular bolt 3. The U-shaped frame 1 can be fixed to the two side edges of the operating bed and screwed and fixed by the annular bolt 3. The top surface of the U-shaped frame 1 is fixedly connected with a fixing block 2. The middle part of the front end surface of the two fixing blocks 2 on the rear side is fixedly connected with a sliding rod 4. The fixing block 2 can support the sliding rod 4. The sliding rod 4 The positions of the neck support device 6, the shoulder support device 7, and the knee support device 8 can be adjusted to suit the height and body shape of the patient. The front ends of the slide bars 4 slide through the front fixing blocks 2. A head fixing device 5 is fixedly connected between the two U-shaped frames 1 at the rear. The head fixing device 5 includes a connecting plate A5-1, a head support plate 5-2, a head support pad 5-3, an outward extension plate 5-4, a telescopic rod 5-5, a transverse sliding cylinder 5-6, an L-shaped rod 5-7, a lower pressure plate 5-8, and a lower pressure pad 5-9. The head fixing device 5 can be easily adjusted to the head The neck support device 6 and the shoulder support device 7 are slidably installed between the two slide bars 4 in sequence. The neck support device 6 includes an L-shaped plate A6-2, a neck adjustment slide cylinder 6-2, a neck base plate 6-1, a neck support plate 6-6, a neck support pad 6-4, a U-shaped rod 6-12, a fixing sleeve 6-13, a limit slide cylinder 6-8, a lifting thread cylinder 6-10, a connecting rod 6-9, a limit slide rod 6-7, a lifting screw 6-5, and a lifting connecting rod 6-11. The neck support device 6 can be raised and lowered to facilitate adjustment to make the patient's head tilt back. To the required surgical angle, the shoulder and back support device 7 includes an L-shaped plate B7-2, a shoulder and back adjustment slide 7-1, a shoulder and back bottom plate 7-3, and a shoulder and back bottom pad 7-4. The shoulder and back support device 7 can support the patient's shoulders and back. A knee support device 8 is fixedly connected between the two U-shaped frames 1 on the front side. The knee support device 8 includes a knee bottom plate 8-1, a connecting plate B8-2, a spacer plate 8-3, an outer guard plate 8-4, a belt frame 8-5, a fixing belt 8-6, a knee support plate 8-10, a knee support pad 8-9, an adjustment screw 8-11, and a limit rod 8-12. The knee support device 8 can support and fix the patient's knees, and can be raised and lowered as needed.

[0024] Two connecting plates A5-1 are symmetrically fixedly connected to the two ends of the head support plate 5-2, and the other ends of the connecting plates A5-1 are connected to the upper outer wall of the U-shaped frame 1. The top surface arc line of the head support plate 5-2 is concave and a layer of head support pad 5-3 is fixed thereon. An extension plate 5-4 is fixedly connected to the rear outer wall of the head support plate 5-2, and a telescopic rod 5-5 is fixedly connected to the top surface of the extension plate 5-4. The telescopic part of the telescopic rod 5-5 is screwed and fixed by locking bolts. The top of the telescopic rod 5-5 is fixedly connected to a transverse sliding cylinder 5-6, and an L-shaped rod 5-7 is slidably inserted in the transverse sliding cylinder 5-6 and screwed and fixed by locking bolts. The lower end of the L-shaped rod 5-7 is fixedly connected to a lower pressure plate 5-8, and a layer of lower pressure pad 5-9 is fixed on the bottom surface of the lower pressure plate 5-8. After the patient's head is supported on the head support pad 5-3, the L-shaped rod 5-7 can be adjusted to be directly above the patient's forehead by moving it forward and backward, and the pressing pad 5-9 can be pressed down on the patient's forehead by adjusting the telescopic rod 5-5 to facilitate fixing the patient's head.

[0025] Two L-shaped plates A6-2 are symmetrically fixedly connected at both ends of the neck base plate 6-1, and the other ends of the L-shaped plates A6-2 are fixedly connected with neck adjustment slides 6-2, and the neck adjustment slides 6-2 are slidably sleeved on the slide rod 4 and screwed and fixed by locking bolts. The neck adjustment slides 6-2 can facilitate the adjustment of the position of the neck support device 6, and a U-shaped rod 6-12 is fixedly connected to the top surface of the neck base plate 6-1, and two fixing sleeves 6-13 are symmetrically fixedly connected to the U-shaped rod 6-12. A semi-cylindrical neck support plate 6-6 is provided on the upper side of the neck base plate 6-1, and a layer of neck support pad 6-4 is fixed on the top surface of the neck support plate 6-6. A limit slide bar 6-7 is fixedly connected to the upper side between the two ends of the neck support plate 6-6, and two limit slide barrels 6-8 are symmetrically slidably sleeved on the limit slide bar 6-7. A lifting screw 6-5 is screwed to the lower side between the two ends of the neck support plate 6-6, and two lifting threaded barrels 6-10 are symmetrically screwed on the lifting screw 6-5. The internal threads of the two lifting threaded barrels 6-10 are opposite to each other. A connecting rod 6-9 is fixedly connected between the limit slide barrel 6-8 and the lifting threaded barrel 6-10 that are close to each other up and down. The limit slide barrel 6-8 can limit the lifting threaded barrel 6-10 so that it cannot rotate. A lifting connecting rod 6-11 is hinged between the lifting threaded barrel 6-10 and the fixed sleeve 6-13 that are close to each other up and down. When the lifting screw 6-5 is rotated and adjusted, the lifting threaded barrel 6-10 can be moved closer or farther away, so that the lifting connecting rod 6-11 is propped up or lowered, thereby lifting and adjusting the height of the neck support plate 6-6 to adjust the lifting support height of the neck.

[0026] The cross section of the shoulder and back base plate 7-3 is triangular and a shoulder and back bottom pad 7-4 is fixed on its top surface. Two L-shaped plates B7-2 are symmetrically fixedly connected at both ends of the shoulder and back base plate 7-3. The other ends of the L-shaped plates B7-2 are fixedly connected with shoulder and back adjustment slides 7-1. The shoulder and back adjustment slides 7-1 are slidably sleeved on the slide rod 4 and are screwed and fixed by locking bolts. The shoulder and back adjustment slides 7-1 can facilitate the adjustment of the support position of the shoulder and back support device 7. The triangular shoulder and back base plate 7-3 and the shoulder and back bottom pad 7-4 can better meet the patient's shoulder and back support needs, so that the chin, trachea, and sternum are as close to the same horizontal line as possible, so as to fully reveal the surgical field of view.

[0027] Two connecting plates B8-2 are symmetrically fixedly connected at both ends of the knee base plate 8-1, and the other ends of the connecting plates B8-2 are fixedly connected to the U-shaped frame 1. A partition plate 8-3 is arranged just above the middle of the knee base plate 8-1, and outer guard plates 8-4 are symmetrically arranged on both sides of the partition plate 8-3. A semi-cylindrical knee support plate 8-10 is fixedly connected between the partition plate 8-3 and the outer guard plate 8-4, and a semi-circular knee support pad 8-9 is fixedly connected to the knee support plate 8-10. The top surface of the partition plate 8-3 is fixed at both ends of the plate edge A fixing belt 8-6 is connected, and the ends of the fixing belt 8-6 are fixedly connected with an adhesive hook surface 8-8 and an adhesive rough surface 8-7. The edges of the top panel of the outer guard plate 8-4 are fixedly connected with a belt frame 8-5. Two limit rods 8-12 are symmetrically fixedly connected to the front and rear sides of the middle of the top surface of the knee base plate 8-1. The limit rods 8-12 are slidably plugged into the partition plate 8-3. The center of the top surface of the knee base plate 8-1 is rotatably connected with an adjusting screw 8-11 through a bearing. The adjusting screw 8-11 is screwed and plugged into the partition plate 8-3. The patient's knee can be placed on the knee support pad 8-9, and the patient's knee can be supported and fixed by the fixing belt 8-6 and the belt frame 8-5. The forward and reverse rotation of the adjusting screw 8-11 can make the partition plate 8-3 drive the knee support plate 8-10 to be raised and lowered, and the patient's knee support height can be adjusted as needed.

[0028] When in use, the device is fixed on both sides of the operating table through the U-shaped frame 1, and the supporting positions of the neck support device 6 and the shoulder support device 7 can be adjusted according to the patient's height and body shape, and then the knee support device 8 is adjusted and the two U-shaped frames 1 on the front side are fixed. The supporting height of the neck support device 6 is adjusted according to the needs of the operation, so that the patient's head is tilted back and supported on the head support pad 5-3, and then the position of the lower pressure plate 5-8 is adjusted to make the lower pressure pad 5-9 press down on the patient's forehead to fix the patient's head, and the patient's knee support height is adjusted by adjusting the screw 8-11 and fixed by the fixing belt 8-6. The device is simple and convenient to use, saving time and effort.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A segmented thyroid surgery pillow, comprising a U-shaped frame, a head fixing device, a neck supporting device, a shoulder and back supporting device, and a knee supporting device, characterized in that: The U-shaped frames are provided with four and they are arranged opposite to each other in pairs. The bottom of the U-shaped frames are all screwed and fixed with annular bolts, the top surface of the U-shaped frames are fixedly connected with fixing blocks, the middle parts of the front end surfaces of the two fixing blocks on the rear side are fixedly connected with sliding rods, the front ends of the sliding rods slide through the fixing blocks on the front side, and a head fixing device is fixedly connected between the two U-shaped frames on the rear side. The head fixing device includes a connecting plate A, a head support plate, a head support pad, an outward extension plate, a telescopic rod, a transverse sliding cylinder, an L-shaped rod, a lower pressure plate, and a lower pressure pad. A neck support is slidably installed between the two sliding rods in sequence. Device and shoulder and back supporting device, the neck supporting device includes L-shaped plate A, neck adjustment slide, neck base plate, neck support plate, neck support pad, U-shaped rod, fixed sleeve, limit slide, lifting threaded tube, connecting rod, limit slide, lifting screw, lifting connecting rod, the shoulder and back supporting device includes L-shaped plate B, shoulder and back adjustment slide, shoulder and back base plate, shoulder and back base pad, a knee supporting device is fixedly connected between the two U-shaped frames on the front side, the knee supporting device includes knee base plate, connecting plate B, spacer plate, outer guard plate, belt frame, fixing belt, knee support plate, knee support pad, adjusting screw, and limit plug rod.

2. The segmented thyroid surgery pillow according to claim 1, characterized in that: Two connecting plates A are symmetrically fixedly connected at both ends of the head support plate, and the other ends of the connecting plates A are connected to the upper outer wall of the U-shaped frame. The top surface of the head support plate is concave under the arc line and a layer of head support pad is fixed on it. An extending plate is fixedly connected to the rear outer wall of the head support plate, and a telescopic rod is fixedly connected to the top surface of the extending plate. The telescopic part of the telescopic rod is screwed and fixed by locking bolts. The top of the telescopic rod is fixedly connected to a transverse sliding cylinder, and an L-shaped rod is slidably inserted in the transverse sliding cylinder and screwed and fixed by locking bolts. The lower end of the L-shaped rod is fixedly connected to a lower pressure plate, and a layer of lower pressure pad is fixed on the bottom surface of the lower pressure plate.

3. The segmented thyroid surgery pillow according to claim 1, characterized in that: The two ends of the neck base plate are symmetrically fixedly connected with two L-shaped plates A, and the other ends of the L-shaped plate A are fixedly connected to a neck adjusting slide cylinder, and the neck adjusting slide cylinder is slidably sleeved on the slide rod and screwed and fixed by locking bolts. The top surface of the neck base plate is fixedly connected with a U-shaped rod, and two fixing sleeves are symmetrically fixedly connected to the upper surface of the U-shaped rod. The upper side of the neck base plate is provided with a semi-cylindrical neck support plate, and a neck support pad is fixed on the top surface of the neck support plate. A limiting sliding rod is fixedly connected to the upper side between the two ends of the neck support plate, and two limiting sliding cylinders are symmetrically slidably sleeved on the limiting sliding rod, and a lifting screw is screwed on the lower side between the two ends of the neck support plate. Two lifting threaded cylinders are symmetrically screwed on the lifting screw, and the internal threads of the two lifting threaded cylinders are opposite. A connecting rod is fixedly connected between the limiting sliding cylinder and the lifting threaded cylinder that are close to each other up and down, and a lifting connecting rod is hinged between the lifting threaded cylinder and the fixing sleeve that are close to each other up and down through a hinge shaft.

4. The segmented thyroid surgery pillow according to claim 1, characterized in that: The cross-section of the shoulder and back base plate is triangular and a shoulder and back base pad is fixed on the top surface thereof. Two L-shaped plates B are symmetrically fixedly connected to the two ends of the shoulder and back base plate. The other ends of the L-shaped plates B are fixedly connected to shoulder and back adjustment slides, and the shoulder and back adjustment slides are slidably sleeved on the slide rod and screwed and fixed by locking bolts.

5. The segmented thyroid surgery pillow according to claim 1, characterized in that: Two connecting plates B are symmetrically fixedly connected at both ends of the knee base plate, and the other ends of the connecting plates B are fixedly connected to the U-shaped frame. A partition plate is arranged just above the middle of the knee base plate, and outer guard plates are symmetrically arranged on both sides of the partition plate. Semi-cylindrical knee support plates are fixedly connected between the partition plate and the outer guard plate, and a semi-circular knee support pad is fixedly connected to the knee support plate. Fixing belts are fixedly connected at the plate edges at both ends of the top surface of the partition plate, and the ends of the fixing belts are fixedly connected with an adhesive hook surface and an adhesive rough surface, and the edges of the top panel of the outer guard plate are fixedly connected with a belt frame, and two limit rods are symmetrically fixedly connected on the front and rear sides of the middle part of the top surface of the knee base plate, and the limit rods are slidably inserted on the partition plate, and an adjusting screw is rotatably connected to the center of the top surface of the knee base plate through a bearing, and the adjusting screw is threadedly inserted on the partition plate.

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