CN216022505U

CN216022505U - Nursing of old disease branch of academic or vocational study is with hand protection device

Info

Publication number: CN216022505U
Application number: CN202121942715.0U
Authority: CN
Inventors: 何红丽
Original assignee: Nanyang Medical College
Current assignee: Nanyang Medical College
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-03-15
Anticipated expiration: 2031-08-18

Abstract

A hand protection device for nursing of an old patient department comprises a base, wherein an L-shaped clamping seat capable of adjusting the left and right positions is arranged at the bottom of the base, and a front clamping plate and a rear clamping plate capable of adjusting the vertical positions are arranged at one end, close to the base, of the lower side of the clamping seat; a rotary seat capable of horizontally rotating is arranged at the top of the base, an adjustable seat capable of moving up and down and swinging back and forth is arranged at the top of the rotary seat, and the maximum distance of the up and down movement of the adjustable seat is adjustable; the adjustable seat top is provided with a plurality of arc plates capable of swinging left and right and arc from front to back, the top of each arc plate is provided with a plurality of adjusting plates capable of moving circumferentially, and the bottom of each adjusting plate is provided with a limiting plate capable of moving radially. The utility model effectively solves the problems of low patient matching degree, strong conflict psychology and poor comfort caused by poor adjustability and poor activity when the hand fixing protection is carried out on the old patient at present.

Description

Nursing of old disease branch of academic or vocational study is with hand protection device

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a hand protection device for nursing of an elderly department.

Background

The senile diseases are diseases which are related to aging and have characteristics, the senile diseases are more than those of young people, and the senile diseases are mainly characterized in that after the elderly enter the senile period, the tissue structure of a human body is further aged, the functions of each organ are gradually obstructed, the body resistance is gradually weakened, the mobility is reduced, and the synergistic function is lost.

In the department of elder diseases, because the patient is all old people, and old people often suffer from some functional disorders (such as Parkinson etc.) because of high age, therefore when carrying out infusion treatment for old people, often because these self functional disorders of patient lead to the hand to appear trembling, this makes the condition that the syringe needle pricked old people's hand appear easily when carrying out the hand infusion to old people.

Therefore, the hands of the elderly need to be protected during infusion, and meanwhile, according to needs (such as when the elderly suffer from certain mental disorders), the patients can resist and even destroy the treatment of medical care personnel, and at the moment, the hands of the patients need to be fixed, so that the medical supplies are prevented from being pulled when the patients lie on the bed.

However, at present, the hand fixing and protecting device for the elderly patients basically ties the hands of the patients on the bed, causes discomfort for the patients, has poor mobility and adjustability, and is easy for the patients to generate conflicted emotion, so that the effect is suitable for the elderly patients.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a hand protection device for nursing of an elderly disease department, which effectively solves the problems of low patient adaptability, strong conflict psychology and poor comfort caused by poor adjustability and poor activity when the hand of an elderly patient is fixedly protected at present.

In order to solve the problems, the utility model adopts the technical scheme that:

a hand protection device for nursing of an old patient department comprises a base, wherein an L-shaped clamping seat capable of adjusting the left and right positions is arranged at the bottom of the base, and a front clamping plate and a rear clamping plate capable of adjusting the vertical positions are arranged at one end, close to the base, of the lower side of the clamping seat; a rotary seat capable of horizontally rotating is arranged at the top of the base, an adjustable seat capable of moving up and down and swinging back and forth is arranged at the top of the rotary seat, and the maximum distance of the up and down movement of the adjustable seat is adjustable;

the adjustable seat top is provided with a plurality of arc plates capable of swinging left and right and arc from front to back, the top of each arc plate is provided with a plurality of adjusting plates capable of moving circumferentially, and the bottom of each adjusting plate is provided with a limiting plate capable of moving radially.

Preferably, the left side of the top of the clamping seat is fixedly connected with a front inserting plate and a rear inserting plate, the right end of the base is provided with a front inserting hole and a rear inserting hole leftwards, and the inserting plates are connected in the corresponding inserting holes in a sliding manner; the plug board is provided with a plurality of locking holes which are uniformly distributed from left to right, the front end and the rear end of the right part of the base are respectively in threaded connection with a locking screw, and the locking screws are screwed into any locking hole to form a structure with fixed positions of the base and the clamping seat;

the lower part of the clamping seat is in threaded connection with a front clamping screw and a rear clamping screw, the top ends of the clamping screws are rotationally connected with corresponding clamping plates, and the bottom ends of the clamping screws are coaxially and fixedly connected with clamping wheels; the top end of the clamping plate is provided with a rubber pad.

Preferably, the rotary seat is rotatably connected with the base, and a vertical screw is connected with the top end of the rotary seat in a downward threaded manner; the top end of the base is downwards provided with a plurality of vertical holes which are uniformly distributed on the circumference, and the vertical screw is screwed into any vertical hole to form a structure with the fixed position of the rotary seat and the fixed position of the base.

Preferably, a sleeve plate capable of swinging back and forth is hinged to the rear side of the top of the swivel base; the front side of the rotary seat is fixedly connected with two lower sliding rods, the lower sliding rods are connected with a lower sliding block in a sliding manner, the lower sliding blocks are hinged with a lower swing rod capable of swinging back and forth, the middle part of the lower swing rod is hinged with the middle part of the sleeve plate, and the tail end of the lower swing rod is hinged to the rear side of the bottom of the adjustable seat;

the front side of the bottom of the adjustable seat is fixedly connected with a control screw and a control guide rod; the inner side of the tail end of the sleeve plate is connected with an inner plate which can move along the length direction of the sleeve plate in a sliding mode, and the tail end of the inner plate is hinged with an upper sliding block; the control screw and the control guide rod are both connected with the upper sliding block in a sliding manner; the upper side of the sleeve plate is in threaded connection with a positioning screw for fixing the sleeve plate and the inner plate;

the control screw is in threaded connection with a control nut.

Preferably, the left sides of the arc plates are hinged with the adjustable seats, the right sides of the arc plates are respectively hinged with a short plate, the bottoms of the short plates are hinged with a long plate, and the long plate is provided with a plurality of uniformly distributed stop holes along the length direction; the right side of the top of the adjustable seat is provided with a plurality of positioning holes matched with the long plate, the right end of the adjustable seat is connected with a stop screw in a leftward threaded manner, and the stop screw is screwed into any stop hole of the corresponding long plate to form a structure for fixing the position of the arc plate and the adjustable seat.

Preferably, the front side and the rear side of the top of the limiting plate are respectively and fixedly connected with a second stud and a limiting slide rod, the second stud and the limiting slide rod are both connected with the adjusting plate in a sliding manner, the periphery of the upper side of the second stud is in threaded connection with a second nut, and the second nut is located on the upper side of the adjusting plate;

the middle of the adjusting plate is connected with a first stud in a sliding mode, the bottom end of the first stud is fixedly connected with an intermediate plate, the second stud and the limiting slide rod are both connected with the intermediate plate in a sliding mode, and the intermediate plate is located on the lower side of the arc plate; the periphery of the top of the first stud is in threaded connection with a first nut, and the first nut is positioned on the upper side of the adjusting plate;

buffer springs are sleeved on the peripheries of the second stud and the limiting slide rod between the middle plate and the limiting plate;

the top of the arc plate is downwards provided with three arc grooves, and the first stud, the second stud and the limiting slide rod are respectively positioned in the corresponding arc grooves.

The utility model has novel structure, ingenious conception and simple and convenient operation, and compared with the prior art, the utility model has the following advantages:

1. this device has better regulation nature: through setting up but horizontal pivoted swivel mount, adjustable maximum displacement distance and adjustable seat that can the fore-and-aft swing, the arc board that can the horizontal hunting and the limiting plate of adjustable circumference and radial position on it to can guarantee that this device can carry out the adaptability according to patient's needs and adjust, guarantee the comfort level that this device used, and help using widely of this device.

2. The device has better activity: the patient can have suitable activity space when being fixed, can preset the maximum distance that patient's arm reciprocated, also can let the patient can swing the arm and reciprocate the distance of removal when the arm is fixed, reduces the patient and is felt by fixed dysphoria, guarantees patient's degree of coordination to make the completion infusion that the patient can be safe.

3. This device has better stability: carry out comfortable fixed to patient's arm through setting up the arc board to stably be located the bedside with this device through holder and splint, guarantee the safety in utilization and the stability of this device.

Drawings

Fig. 1 is a first isometric view of a hand protector for geriatric care in accordance with the present invention.

Fig. 2 is a second isometric view of a hand protector for geriatric care in accordance with the present invention.

Fig. 3 is a third perspective view of a hand protector for geriatric care in accordance with the present invention.

Fig. 4 is an isometric view of a holder of a hand protector for geriatric care in accordance with the present invention.

Fig. 5 is an isometric view of a base of a hand protector for geriatric care in accordance with the present invention.

Fig. 6 is an isometric view of a swivel mount and its attachment components of a hand protector for geriatric care in accordance with the present invention.

Fig. 7 is an isometric view of an adjustable seat of a hand protector for geriatric care in accordance with the present invention.

Fig. 8 is an isometric view of an arc plate of a hand protector for geriatric care in accordance with the present invention.

Fig. 9 is an isometric view of a limiting plate and its connecting parts of a hand protecting device for geriatrics care according to the present invention.

In the drawings: 1-base, 2-clamping base, 3-clamping plate, 4-rotary base, 5-adjustable base, 6-arc plate, 7-adjusting plate, 8-limiting plate, 9-inserting plate, 10-locking hole, 11-clamping screw, 12-clamping wheel, 13-locking screw, 14-vertical hole, 15-jack, 16-sleeve plate, 17-inner plate, 18-positioning screw, 19-upper slide block, 20-lower slide block, 21-lower slide block, 22-lower swing rod, 23-vertical screw, 24-control screw, 25-control nut, 26-control guide rod, 27-stop screw, 28-short plate, 29-long plate, 30-stop hole, 31-intermediate plate, 32-first screw, 33-first nut, 34-a second stud, 35-a limiting slide rod, 36-a buffer spring and 37-a second nut.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-9, the utility model provides a hand protection device for nursing in the geriatrics department, which comprises a base 1, wherein an L-shaped holder 2 capable of adjusting left and right positions is arranged at the bottom of the base 1, and a front clamp plate 3 and a rear clamp plate 3 capable of adjusting vertical positions respectively are arranged at one end, close to the base 1, of the lower side of the holder 2; a rotary seat 4 capable of horizontally rotating is arranged at the top of the base 1, an adjustable seat 5 capable of vertically moving and swinging back and forth is arranged at the top of the rotary seat 4, and the maximum vertical movement distance of the adjustable seat 5 is adjustable;

a plurality of arc plates 6 capable of swinging left and right and arc-shaped are arranged at the top of the adjustable seat 5 from front to back, a plurality of adjusting plates 7 capable of moving circumferentially are arranged at the tops of the arc plates 6 respectively, and a limiting plate 8 capable of moving radially is arranged at the bottom of each adjusting plate 7.

This device has better regulation nature: through setting up but horizontal pivoted swivel mount 4, adjustable maximum displacement distance and adjustable seat 5 of fore-and-aft swing, the arc board 6 that can horizontal hunting and adjustable circumference and the limiting plate 8 of radial position on it to can guarantee that this device can carry out the adaptability according to patient's needs and adjust, guarantee the comfort level that this device used, and help the using widely of this device.

The device has better activity: the patient can have suitable activity space when being fixed, can preset the maximum distance that patient's arm reciprocated, also can let the patient can swing the arm and reciprocate the distance of removal when the arm is fixed, reduces the patient and is felt by fixed dysphoria, guarantees patient's degree of coordination to make the completion infusion that the patient can be safe.

This device has better stability: carry out comfortable fixed to patient's arm through setting up arc 6 to stably be located the bedside with this device through holder 2 and splint 3, guarantee the safety in utilization and the stability of this device.

As shown in fig. 1, 4 and 5, the left side of the top of the holder 2 is fixedly connected with a front inserting plate and a rear inserting plate 9, the right end of the base 1 is provided with a front inserting hole and a rear inserting hole 15 leftwards, and the inserting plates 9 are slidably connected in the corresponding inserting holes 15; the inserting plate 9 is provided with a plurality of locking holes 10 which are uniformly distributed from left to right, the front end and the rear end of the right part of the base 1 are respectively in threaded connection with a locking screw 13, and the locking screw 13 is screwed into any locking hole 10 to form a structure with fixed positions of the base 1 and the clamping seat 2;

the lower part of the clamping seat 2 is in threaded connection with a front clamping screw 11 and a rear clamping screw 11, the top ends of the clamping screws 11 are rotationally connected with the corresponding clamping plates 3, and the bottom ends of the clamping screws 11 are coaxially and fixedly connected with clamping wheels 12; the top end of the clamping plate 3 is provided with a rubber pad.

The left and right positions of the base of the device and the upper part of the base are adjusted according to requirements, so that the arms of the patient can be conveniently positioned.

Two splint 3 around the bottom sets up for this device can be stabilized the location according to the situation of bed bottom, guarantees the stability of location.

As shown in fig. 2 and 5, the rotary seat 4 is rotatably connected with the base 1, and a vertical screw 23 is screwed downwards at the top end of the rotary seat 4; the top end of the base 1 is provided with a plurality of vertical holes 14 which are uniformly distributed on the circumference downwards, and the vertical screw 23 is screwed into any vertical hole 14 to form a structure which fixes the positions of the rotary seat 4 and the base 1.

The horizontal included angle of swivel mount 4 and base 1 has been adjusted as required, guarantees the travelling comfort and the stability of this device location.

As shown in fig. 2, 3, 6 and 7, a sleeve plate 16 capable of swinging back and forth is hinged to the rear side of the top of the rotary seat 4; two lower sliding rods 20 are fixedly connected to the front side of the rotary seat 4, the lower sliding rods 20 are connected with a lower sliding block 21 in a sliding mode, the lower sliding block 21 is hinged to a lower swing rod 22 capable of swinging back and forth, the middle of the lower swing rod 22 is hinged to the middle of the sleeve plate 16, and the tail end of the lower swing rod 22 is hinged to the rear side of the bottom of the adjustable seat;

a control screw 24 and a control guide rod 26 are fixedly connected to the front side of the bottom of the adjustable seat 5; the inner side of the tail end of the sleeve plate 16 is connected with an inner plate 17 which can move along the length direction of the sleeve plate 16 in a sliding mode, and the tail end of the inner plate 17 is hinged with an upper sliding block 19; the control screw 24 and the control guide rod 26 are both connected with the upper sliding block 19 in a sliding manner; a positioning screw 18 for fixing the sleeve plate 16 and the inner plate 17 is connected to the upper side of the sleeve plate 16 in a threaded manner;

the control screw 24 is threadedly connected with a control nut 25.

The set screw 18 is unscrewed, so that the inner plate 17 can move relative to the sleeve plate 16, the sum of the lengths of the inner plate 17 and the sleeve plate 16 is changed relative to the lower swing rod 22, and the adjustable seat 5 is swung, so that the patient can slightly swing the arm, and the mobility of the device is realized.

The position of the control nut 25 on the control screw 24 is adjusted, so that the maximum distance of the back and forth movement of the upper slide block 19 can be limited, and the arm of a patient can be moved in a limited range, and the safety and the comfort are ensured.

As shown in fig. 2, 7 and 8, the left sides of the arc plates 6 are hinged to the adjustable seat 5, the right sides of the arc plates 6 are respectively hinged to a short plate 28, the bottoms of the short plates 28 are hinged to a long plate 29, and the long plate 29 is provided with a plurality of uniformly distributed stop holes 30 along the length direction; the right side of the top of the adjustable seat 5 is provided with a plurality of positioning holes matched with the long plate 29, the right end of the adjustable seat 5 is connected with a stop screw 27 in a leftward threaded manner, and the stop screw 27 is screwed into any stop hole 30 of the corresponding long plate 29 to form a structure for fixing the positions of the arc plate 6 and the adjustable seat 5.

The swing angle of the arc plate 6 is roughly adjusted according to factors such as the thickness of the arm of a patient, the arm of the patient is preliminarily positioned, and the radial positions of the limiting plates 8 are adjusted to achieve better positioning.

As shown in fig. 8-9, a second stud 34 and a limiting slide bar 35 are fixedly connected to the front side and the rear side of the top of the limiting plate 8, the second stud 34 and the limiting slide bar 35 are both connected to the adjusting plate 7 in a sliding manner, a second nut 37 is connected to the outer periphery of the upper side of the second stud 34 in a threaded manner, and the second nut 37 is located on the upper side of the adjusting plate 7;

a first stud 32 is slidably connected to the middle of the adjusting plate 7, an intermediate plate 31 is fixedly connected to the bottom end of the first stud 32, the second stud 34 and the limiting slide rod 35 are both slidably connected to the intermediate plate 31, and the intermediate plate 31 is located on the lower side of the arc plate 6; a first nut 33 is connected to the outer periphery of the top of the first stud 32 in a threaded manner, and the first nut 33 is positioned on the upper side of the adjusting plate 7;

buffer springs 36 are sleeved on the peripheries of the second stud 34 and the limiting slide rod 35 between the middle plate 31 and the limiting plate 8;

three arc grooves are formed downwards at the top of the arc plate 6, and the first stud 32, the second stud 34 and the limiting slide rod 35 are respectively positioned in the corresponding arc grooves. And silica gel pads are respectively arranged at the lower sides of the limit plates 8.

The pine soon first nut 33 for regulating plate 7 can remove along arc 6 peripheries, after the week position of regulating plate 7 has been adjusted, rotates the radial position of each limiting plate 8 is further adjusted to second nut 37, realizes further location, and because buffer spring 36's existence, makes limiting plate 8 except stable to patient's restriction, has certain comfort level in addition, has guaranteed patient's comfort.

This device is when using, at first adjusts the position about holder 2 to the vertical position of adjusting splint 3 is fixed a position this device in the suitable position of bedside, arranges the arm of patient in the arc 6 downside, adjusts the arc 6 to suitable inclination, realizes the preliminary positioning to the arm, adjusts the circumference and the radial position of each limiting plate 8 immediately, realizes the location to the arm, and adjustable control nut 25's fore-and-aft position is in order to adjust the biggest upward moving distance of adjustable seat 5, and can loosen soon set screw 18 makes the micro-swing arm of patient, screws as required it is spacing with swivel mount 4 to erect screw 23, thereby can both guarantee fixed security and stability and compromise patient's travelling comfort, increase patient's degree of coordination.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although the terms of base 1, holder 2, clamping plate 3, swivel base 4, adjustable base 5, arc plate 6, adjusting plate 7, limiting plate 8, inserting plate 9, locking hole 10, clamping screw 11, clamping wheel 12, locking screw 13, vertical hole 14, insertion hole 15, sleeve plate 16, inner plate 17, positioning screw 18, upper slide 19, lower slide 20, lower slide 21, lower swing rod 22, vertical screw 23, control screw 24, control nut 25, control guide rod 26, stop screw 27, short plate 28, long plate 29, stop hole 30, middle plate 31, first stud 32, first nut 33, second stud 34, limiting slide 35, buffer spring 36, second nut 37, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a nursing of old disease branch of academic or vocational study is with hand protection device, includes a base (1), its characterized in that: the bottom of the base (1) is provided with an L-shaped clamping seat (2) capable of adjusting the left and right positions, and one end of the lower side of the clamping seat (2) close to the base (1) is provided with a front clamping plate and a rear clamping plate (3) capable of adjusting the vertical positions respectively; a rotary seat (4) capable of horizontally rotating is arranged at the top of the base (1), an adjustable seat (5) capable of moving up and down and swinging back and forth is arranged at the top of the rotary seat (4), and the maximum distance of the up and down movement of the adjustable seat (5) is adjustable;

adjustable seat (5) top is provided with a plurality of horizontal hunting, curved arc board (6) from preceding backward, arc board (6) top is provided with a plurality of adjusting plates (7) that can circumferential movement respectively, adjusting plate (7) bottom is provided with a limiting plate (8) that can radial movement respectively.

2. The hand protector for nursing in geriatrics department as claimed in claim 1, wherein: the left side of the top of the clamping seat (2) is fixedly connected with a front inserting plate and a rear inserting plate (9), the right end of the base (1) is provided with a front inserting hole and a rear inserting hole (15) leftwards, and the inserting plates (9) are connected in the corresponding inserting holes (15) in a sliding manner; the inserting plate (9) is provided with a plurality of locking holes (10) which are uniformly distributed from left to right, the front end and the rear end of the right part of the base (1) are respectively in threaded connection with a locking screw (13), and the locking screw (13) is screwed into any locking hole (10) to form a structure with fixed positions of the base (1) and the clamping seat (2);

the lower part of the clamping seat (2) is in threaded connection with a front clamping screw rod and a rear clamping screw rod (11), the top ends of the clamping screw rods (11) are rotatably connected with corresponding clamping plates (3), and the bottom ends of the clamping screw rods (11) are coaxially and fixedly connected with clamping wheels (12); the top end of the clamping plate (3) is provided with a rubber pad.

3. The hand protector for nursing in geriatrics department as claimed in claim 1, wherein: the rotary seat (4) is rotatably connected with the base (1), and a vertical screw (23) is connected with the top end of the rotary seat (4) in a downward threaded manner; the top end of the base (1) is downwards provided with a plurality of vertical holes (14) which are uniformly distributed on the circumference, and the vertical screw (23) is screwed into any vertical hole (14) to form a structure for fixing the positions of the rotary seat (4) and the base (1).

4. The hand protector for nursing in geriatrics department as claimed in claim 1, wherein: a sleeve plate (16) capable of swinging back and forth is hinged to the rear side of the top of the swivel base (4); two lower sliding rods (20) are fixedly connected to the front side of the rotary seat (4), the lower sliding rods (20) are connected with a lower sliding block (21) in a sliding mode, the lower sliding block (21) is hinged with a lower swing rod (22) capable of swinging back and forth, the middle of the lower swing rod (22) is hinged with the middle of the sleeve plate (16), and the tail end of the lower swing rod (22) is hinged to the rear side of the bottom of the adjustable seat;

the front side of the bottom of the adjustable seat (5) is fixedly connected with a control screw rod (24) and a control guide rod (26); the inner side of the tail end of the sleeve plate (16) is connected with an inner plate (17) which can move along the length direction of the sleeve plate (16) in a sliding mode, and the tail end of the inner plate (17) is hinged with an upper sliding block (19); the control screw rod (24) and the control guide rod (26) are both connected with the upper sliding block (19) in a sliding manner; the upper side of the sleeve plate (16) is in threaded connection with a positioning screw (18) used for fixing the sleeve plate (16) and the inner plate (17);

the control screw rod (24) is in threaded connection with a control nut (25).

5. The hand protector for nursing in geriatrics department as claimed in claim 1, wherein: the left side of the arc plate (6) is hinged with the adjustable seat (5), the right side of the arc plate (6) is hinged with a short plate (28), the bottom of the short plate (28) is hinged with a long plate (29), and the long plate (29) is provided with a plurality of stop holes (30) which are uniformly distributed along the length direction; the right side of the top of the adjustable seat (5) is provided with a plurality of positioning holes matched with the long plate (29), the right end of the adjustable seat (5) is connected with a stop screw (27) in a left threaded mode, and the stop screw (27) is screwed into any stop hole (30) of the corresponding long plate (29) to form a structure for fixing the positions of the arc plate (6) and the adjustable seat (5).

6. The hand protector for nursing in geriatrics department as claimed in claim 1, wherein: a second stud (34) and a limiting slide rod (35) are fixedly connected to the front side and the rear side of the top of the limiting plate (8) respectively, the second stud (34) and the limiting slide rod (35) are both connected with the adjusting plate (7) in a sliding mode, a second nut (37) is connected to the periphery of the upper side of the second stud (34) in a threaded mode, and the second nut (37) is located on the upper side of the adjusting plate (7);

the middle of the adjusting plate (7) is connected with a first stud (32) in a sliding mode, the bottom end of the first stud (32) is fixedly connected with an intermediate plate (31), the second stud (34) and the limiting sliding rod (35) are connected with the intermediate plate (31) in a sliding mode, and the intermediate plate (31) is located on the lower side of the arc plate (6); the periphery of the top of the first stud (32) is in threaded connection with a first nut (33), and the first nut (33) is located on the upper side of the adjusting plate (7);

buffer springs (36) are sleeved on the peripheries of a second stud (34) and a limiting slide rod (35) between the middle plate (31) and the limiting plate (8);

three arc grooves are formed downwards in the top of the arc plate (6), and the first stud (32), the second stud (34) and the limiting sliding rod (35) are respectively located in the corresponding arc grooves.