CN115252307B

CN115252307B - Auxiliary breathing device based on heart failure patient uses

Info

Publication number: CN115252307B
Application number: CN202210723211.2A
Authority: CN
Inventors: 蔡恒
Original assignee: Second Hospital of Shanxi Medical University
Current assignee: Second Hospital of Shanxi Medical University
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2023-06-30
Anticipated expiration: 2042-06-21
Also published as: CN115252307A

Abstract

The invention discloses a assisted breathing device based on heart failure patients, which comprises a bed body for supporting the patients, wherein the bed body comprises a first supporting plate and a second supporting plate, and the first supporting plate comprises a first supporting plate A and a first supporting plate B; the first support plate B comprises a first hinge member and a second hinge member which are arranged on two adjacent side edges; the first hinge piece is hinged with one side of the second support plate and is used for enabling the first support plate to rotate around a first rotation shaft; the second hinge piece is hinged with the first support plate A and is used for enabling the first support plate A to rotate around a second rotation shaft; wherein, the contained angle alpha between first rotation axis and the second rotation axis satisfies: alpha is more than 0 DEG and less than or equal to 90 DEG, and the posture of a patient can be conveniently and rapidly adjusted through the structural design of the bed board, so that the dyspnea condition of the patient can be rapidly relieved.

Description

Auxiliary breathing device based on heart failure patient uses

Technical Field

The invention belongs to the technical field of medical equipment, and further relates to a assisted breathing device based on heart failure patients.

Background

Heart failure is the most severe manifestation of heart disease, also called "cardiac insufficiency", which means that the heart muscle is severely damaged, so that the heart cannot normally pump enough blood to supply the demands of the activities and metabolism of various organs of the body, and the heart thus becomes progressively hypertrophic and loses heart function.

Along with the progress of illness state, the condition of dyspnea usually appears, and medical personnel need to assist patient to sit or adopt the semi-lying position in nursing work to make under the effect of gravity, be detained partial blood in low limbs and pelvic cavity, the heart blood volume of returning reduces, thereby reduce pulmonary congestion and heart burden, can make diaphragm position decline simultaneously, the thoracic cavity capacity enlarges, lightens the pressure of organs to heart lung in the abdominal cavity, and the pulmonary capacity increases, is favorable to gas exchange, makes the symptom of dyspnea improve.

And the heart failure patient often has cough, cough white sticky sputum or foam sputum, and has the same time with dyspnea, and in the nursing process of medical personnel, the operation of assisting patient to turn over and clap the back can also be carried out generally, so how to improve the effectual supplementary patient and carry out posture adjustment, and guarantee the efficiency of posture adjustment is the technical problem that needs to solve.

In view of this, the present application is hereby presented.

Disclosure of Invention

Aiming at the problem of low efficiency of medical staff in the process of adjusting the posture of a patient in the prior art, the invention provides an auxiliary breathing device used for a patient based on heart failure, and the posture of the patient can be conveniently and rapidly adjusted by the structural design of a bed board, so that the dyspnea condition of the patient can be rapidly relieved.

The invention is realized by the following technical proposal

The invention provides a assisted breathing device used for heart failure patients, which comprises a bed body used for supporting the patients, wherein the bed body comprises a first supporting plate and a second supporting plate, and the first supporting plate comprises a first supporting plate A and a first supporting plate B; the first support plate B comprises a first hinge member and a second hinge member which are arranged on two adjacent side edges; the first hinge piece is hinged with one side of the second support plate and is used for enabling the first support plate to rotate around a first rotation shaft; the second hinge piece is hinged with the first support plate A and is used for enabling the first support plate A to rotate around a second rotation shaft; wherein, the contained angle alpha between first rotation axis and the second rotation axis satisfies: alpha is more than 0 DEG and less than or equal to 90 deg.

In this scheme, the auxiliary breathing device includes the bed body that is used for supporting the patient, and the patient of heart failure can lie on the bed body and realize rehabilitation and treatment, and when the patient of heart failure appears breathing trouble or needs to clap phlegm etc. the condition, the contained angle between accessible adjustment first backup pad and the second backup pad to the convenient half-lying position of adjusting the layer of patient, the upper limbs portion of patient is located at this moment first backup pad mutually support, realizes adjustment and the maintenance of position appearance; and in order to satisfy the demand of clapping the phlegm, through the structural design to first backup pad, two plate bodies that can adjust contained angle each other are designed into to the accessible adjustment contained angle between the two, assist the realization patient's the side to make things convenient for medical personnel to clap the phlegm, through the utilization of this device, can be quick effectual realization patient position appearance's adjustment, compare in prior art directly have the mode of medical patient to move patient's limbs adjustment, can promote adjustment efficiency greatly, reduce medical personnel's working strength.

Further, the first rotating shaft and the second rotating shaft are perpendicular to each other.

Further, the widths of the first support plate and the second support plate are the same; the widths of the first support plate A and the first support plate B are the same, and are 1/2 of the widths of the first support plates.

Further, the bed body further comprises supporting legs, and universal wheels for achieving movement of the bed body are arranged on the supporting legs.

Further, the second support plate may be a telescopic plate, and the second support plate may be adjustable to change the relative distance between the hinge side and the opposite side of the second support plate and the first support plate.

Further, the device also comprises a driving assembly, wherein the driving assembly comprises a first driving unit and a second driving unit, and the first driving unit is used for realizing the change of an included angle between the first supporting plate and the second supporting plate; the second driving unit is used for realizing the change of the included angle between the first supporting plate A and the first supporting plate B.

Further, the first driving unit comprises a rotating shaft, a matched gear is fixedly connected with the rotating shaft, and a driving wheel used for being meshed with the matched gear to realize the rotation of the rotating shaft along the axis of the driving wheel; the rotating shaft is also sleeved with a first shaft sleeve, and the first shaft sleeve is connected with the first supporting plate through a first connecting rod; the first shaft sleeve is provided with an internal thread, the rotating shaft is provided with an external thread, and when the driving wheel drives the rotating shaft to rotate, the external thread is meshed with the internal thread, so that the first shaft sleeve moves along the axis direction of the rotating shaft.

Further, the bed body further comprises a third supporting plate, the third supporting plate is arranged on the other side of the second supporting plate relative to the first supporting plate, and the third supporting plate is hinged with the second supporting plate; a second sleeve is sleeved on the rotating shaft and connected with the third supporting plate through a second connecting rod; the second shaft sleeve is provided with internal threads, when the driving wheel drives the rotating shaft to rotate, the external threads are meshed with the internal threads, so that the second shaft sleeve moves along the axis direction of the rotating shaft, and the first shaft sleeve and the second shaft sleeve are respectively positioned at two sides of the matched gear along the axis direction of the rotating shaft.

Further, the second driving unit comprises a supporting seat, and the supporting seat comprises a connecting section and a limiting section; the connecting section is fixedly connected with the first support plate B, and the limiting section bears the first support plate A and is used for limiting the first support plate A to rotate under the action of self gravity.

Further, the second driving unit further comprises a telescopic cylinder, and when the first driving unit drives the first supporting plate to rotate, the first shaft sleeve is close to the telescopic cylinder along the axial direction of the rotating shaft; the telescopic cylinder is provided with a triggering structure at one side close to the first shaft sleeve, the triggering structure comprises two electric connection points which are arranged at intervals, and the electric connection points are communicated with the telescopic cylinder through a power supply circuit; the utility model discloses a telescopic cylinder, including flexible cylinder, first axle sleeve, the first axle sleeve is close to one side of flexible cylinder is provided with the conducting strip, works as first axle sleeve is followed the axis direction of pivot moves to keeping away from when the furthest of mating gear, the conducting strip with the electricity tie point contacts each other, realizes power supply circuit's UNICOM, thereby drive flexible cylinder stretches out and draws back, drives first backup pad A rotates.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the invention relates to a assisted breathing device based on heart failure patients, which comprises a bed body used for supporting the patients, wherein the heart failure patients can lie on the bed body to realize rehabilitation and treatment, when the heart failure patients have the conditions of difficult breathing or phlegm shooting and the like, the included angle between a first supporting plate and a second supporting plate can be adjusted, so that the patients can be conveniently adjusted to a semi-lying position, and the upper limb parts of the patients are positioned on the first supporting plate to be mutually matched to realize the adjustment and the maintenance of the pose; and in order to satisfy the demand of clapping the phlegm, through the structural design to first backup pad, two plate bodies that can adjust contained angle each other are designed into to the accessible adjustment contained angle between the two, assist the realization patient's the side to make things convenient for medical personnel to clap the phlegm, through the utilization of this device, can be quick effectual realization patient position appearance's adjustment, compare in prior art directly have the mode of medical patient to move patient's limbs adjustment, can promote adjustment efficiency greatly, reduce medical personnel's working strength.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention.

In the drawings:

FIG. 1 is a schematic view of a bed according to the present invention;

fig. 2 is a schematic diagram of the cooperation of the first support plate and the second support plate provided by the invention;

FIG. 3 is a side view of a secondary respiratory apparatus provided by the present invention;

FIG. 4 is an enlarged view of a portion of area A of FIG. 3;

FIG. 5 is an enlarged view of a portion of region B of FIG. 4;

fig. 6 is a schematic diagram illustrating the cooperation of the first support plate a, the first support plate B and the second driving unit according to the present invention.

The reference numerals in the figures are in turn:

100-bed body, 110-first backup pad, 111-first backup pad A, 112-first backup pad B, 120-second backup pad, 130-supporting leg, 140-third backup pad, 210-pivot, 220-mating gear, 230-action wheel, 240-first axle sleeve, 241-conducting strip, 251-first connecting rod, 252-second connecting rod, 260-second axle sleeve, 312-spacing section, 320-telescopic cylinder, 321-electrical connection point.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the invention.

Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.

Examples

As shown in fig. 1-2, the present invention provides a assisted respiration device for heart failure patients, comprising a bed 100 for supporting the patients, wherein the bed 100 comprises a first support plate 110 and a second support plate 120, and the first support plate 110 comprises a first support plate a111 and a first support plate B112; the first support plate B112 includes a first hinge and a second hinge provided on two adjacent side edges; the first hinge is hinged to one side of the second support plate 120, for enabling the first support plate 110 to rotate about the first rotation axis 210; the second hinge member is hinged with the first support plate a111, and is used for enabling the first support plate a111 to rotate around a second rotation shaft 210; wherein, the included angle α between the first rotation axis 210 and the second rotation axis 210 satisfies: alpha is more than 0 DEG and less than or equal to 90 deg.

Specifically, the first support plate B112 includes a first hinge member and a second hinge member disposed on two adjacent side edges; it should be noted that, through the arrangement of the first hinge, the change of the relative angle between the first support plate 110 and the second support plate 120 is achieved, through the arrangement of the second hinge, the change of the relative angle between the first support plate a111 and the first support plate B112 is achieved, as shown in fig. 2, for the specific structure of the first support plate 110 and the second support plate 120, the first support plate B112 is hinged with the second support plate 120, the establishment of the connection relationship between the first support plate 110 and the second support plate 120 is achieved, and for the first support plate a111 near the side of the second support plate 120, the connection relationship is not established between the first support plate a111 and the second support plate 120, so as to avoid the mutual influence caused between the first support plate a111 and the second support plate 120 during rotation.

As a person skilled in the art should know, the first support plate 110 is divided into two plate structures, and the purpose of the first support plate is to assist the patient to turn over by the relative rotation between the two structures, so the specific size and shape of the two plates are not limited, and the turning over requirement can be met.

Specifically, the included angle α between the first rotation axis 210 and the second rotation axis 210 satisfies: alpha is more than 0 and less than or equal to 90 degrees, namely the aim of side turning is fulfilled through specific position limitation.

In this scheme, the auxiliary breathing apparatus includes a bed body 100 for supporting a patient, the patient with heart failure can lie on the bed body 100 to achieve rehabilitation and treatment, when the patient with heart failure has a situation of difficult breathing or needs to clap phlegm, the patient can be conveniently adjusted to a semi-lying position by adjusting the included angle between the first support plate 110 and the second support plate 120, and at this time, the upper limb parts of the patient are located in the first support plate 110 and are mutually matched to achieve adjustment and maintenance of the pose; and in order to satisfy the demand of clapping the phlegm, through the structural design to first backup pad 110, two plate bodies that can adjust contained angle each other are designed into to the contained angle between the accessible adjustment two, assist the realization patient's the side to make things convenient for medical personnel to clap the phlegm, through the utilization of this device, can be quick effectual realization patient position appearance's adjustment, compare in prior art directly have the mode of medical patient to move patient's limbs adjustment, can promote adjustment efficiency greatly, reduce medical personnel's working strength.

In some embodiments, the first rotation axis 210 and the second rotation axis 210 are disposed perpendicular to each other, and the effectiveness of turning over is ensured by the perpendicular arrangement of the two.

In some embodiments, the first support plate 110 is the same width as the second support plate 120; the width of the first support plate a111 is the same as that of the first support plate B112, and is 1/2 of the width of the first support plate 110, and the effectiveness of turning over is further ensured through the arrangement of the width of the first support plate a111 and the width of the first support plate B112, and the first support plate a is of an equal-width structure, so that the situation that active adjustment is required due to uncertainty of the lying position of a patient can be effectively reduced.

In some embodiments, the bed 100 further comprises support legs 130, and the support legs 130 are provided with universal wheels for realizing the movement of the bed 100.

In some embodiments, the second support plate 120 is a telescopic plate, the second support plate 120 can be adjusted to change the relative distance between the hinge side and the opposite side of the second support plate 120 and the first support plate 110, and the telescopic plate can be effectively elongated to meet the requirements of different patients.

The structure of the expansion plate is not described herein, and is a conventional technical means.

As shown in fig. 3-5, in some embodiments, the device further includes a driving assembly, where the driving assembly includes a first driving unit and a second driving unit, and the first driving unit is configured to implement a change in an included angle between the first support plate 110 and the second support plate 120; the second driving unit is used for realizing the change of the included angle between the first supporting plate A111 and the first supporting plate B112.

In some embodiments, the first driving unit includes a rotating shaft 210, a mating gear 220 fixedly connected to the rotating shaft 210, and a driving wheel 230 for engaging with the mating gear 220 to enable the rotating shaft 210 to rotate along its own axis; the rotating shaft 210 is further sleeved with a first shaft sleeve 240, and the first shaft sleeve 240 is connected with the first supporting plate 110 through a first connecting rod 251; the first shaft sleeve 240 has an internal thread, and the rotating shaft 210 has an external thread, and when the driving wheel 230 drives the rotating shaft 210 to rotate, the external thread and the internal thread are engaged with each other, so that the first shaft sleeve 240 moves along the axial direction of the rotating shaft 210.

Wherein, the rotating shaft 210 is fixedly connected with the mating gear 220, when the driving wheel 230 drives the mating gear 220 to rotate, the rotating shaft 210 can be driven to rotate synchronously, and it should be noted that, in order to ensure the stability of the rotating shaft 210, a bearing structure can be arranged at the end of the rotating shaft 210, so that on one hand, the stability of the rotating shaft 210 is ensured, and on the other hand, the influence of the rotation of the rotating shaft 210 on the fixation of the rotating shaft 210 is avoided.

The matching relationship between the matching gear 220 and the driving wheel 230 is not described herein, and may be a conventional roller structure or a worm drive structure, i.e. the rotation of the rotating shaft 210 along the axis thereof may be realized, which is a conventional technical means.

In some embodiments, the bed 100 further includes a third support plate 140, the third support plate 140 is disposed at the other side of the second support plate 120 with respect to the first support plate 110, and the third support plate 140 is hinged with the second support plate 120; a second sleeve 260 is further sleeved on the rotating shaft 210, and the second sleeve 260 is connected with the third supporting plate 140 through a second connecting rod 252; the second sleeve 260 has an internal thread, when the driving wheel 230 drives the rotating shaft 210 to rotate, the external thread and the internal thread are engaged with each other, so as to realize the movement of the second sleeve 260 along the axial direction of the rotating shaft 210, wherein the first sleeve 240 and the second sleeve 260 are respectively located at two sides of the mating gear 220 along the axial direction of the rotating shaft 210.

Through the structural design of the third support plate 140, when the posture is adjusted, the change of the included angle of the third support plate 140 relative to the second support plate 120 can be realized, so that a seat posture is formed, and the dyspnea condition of a patient is further relieved.

It should be noted that, in a specific embodiment, the second support plate 120 is used as a plate body parallel to the ground, the other side of the hinged side of the first support plate 110 and the second support plate 120 should be higher than the plane of the second support plate 120, and the corresponding side of the third support plate 140 should be lower than the plane of the second support plate 120, so that the rotating shaft 210 is heard during the corresponding rotation process, thereby realizing the movement of the first shaft sleeve 240 and the second shaft sleeve 260 on the rotating shaft 210, and adjusting the included angle between the first connecting rod 251 and the second connecting rod 252 relative to the ground, thereby realizing the adjustment of the included angle between the first support plate 110 and the second support plate 120.

As shown in fig. 6, in some embodiments, the second drive unit includes a support base including a connection section and a limit section 312; the connecting section is fixedly connected with the first support plate B112, and the limiting section 312 carries the first support plate a111 and is used for limiting the first support plate a111 to rotate under the action of gravity.

In some embodiments, the second driving unit further includes a telescopic cylinder 320, and when the first driving unit drives the first support plate 110 to rotate, the first shaft sleeve 240 approaches the telescopic cylinder 320 along the axial direction of the rotating shaft 210; a triggering structure is arranged on one side of the telescopic cylinder 320, which is close to the first shaft sleeve 240, and the triggering structure comprises two electrical connection points 321 which are arranged at intervals, wherein the electrical connection points 321 are communicated with the telescopic cylinder 320 through a power supply circuit; the first shaft sleeve 240 is provided with a conductive sheet 241 on a side close to the telescopic cylinder 320, when the first shaft sleeve 240 moves along the axial direction of the rotating shaft 210 to a far end far away from the mating gear 220, the conductive sheet 241 contacts with the electrical connection point 321 to realize the communication of the power supply circuit, so as to drive the telescopic cylinder 320 to stretch and drive the first support plate a111 to rotate.

Specifically, through the cooperation of first drive unit and second drive unit, can be in corresponding semi-lying position or seat gesture adjustment after accomplishing effectual realization patient stands up to improve efficiency.

It should be noted that, for the telescopic cylinder 320, a reset mechanism may be further provided, and reset after the corresponding sputum is completed, so as to avoid the patient from always leaning on.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. A assisted breathing apparatus for heart failure based patient use, comprising a bed (100) for supporting a patient, characterized in that,

the bed body (100) comprises a first supporting plate (110) and a second supporting plate (120), wherein the first supporting plate (110) comprises a first supporting plate A (111) and a first supporting plate B (112);

the first support plate B (112) includes a first hinge and a second hinge provided on two adjacent side edges;

the first hinge member is hinged with one side of the second support plate (120) and is used for enabling the first support plate (110) to rotate around a first rotation shaft;

the second hinge member is hinged with the first support plate A (111) and is used for enabling the first support plate A (111) to rotate around a second rotation shaft;

wherein, the contained angle alpha between first rotation axis and the second rotation axis satisfies: alpha is more than 0 and less than or equal to 90 degrees;

the device further comprises a driving assembly, wherein the driving assembly comprises a first driving unit and a second driving unit, and the first driving unit is used for realizing the change of an included angle between the first supporting plate (110) and the second supporting plate (120); the second driving unit is used for realizing the change of an included angle between the first supporting plate A (111) and the first supporting plate B (112);

the first driving unit comprises a rotating shaft (210), a matched gear (220) fixedly connected with the rotating shaft (210), and a driving wheel (230) which is meshed with the matched gear (220) to realize the rotation of the rotating shaft (210) along the axis of the driving wheel; the rotating shaft (210) is also sleeved with a first shaft sleeve (240), and the first shaft sleeve (240) is connected with the first supporting plate (110) through a first connecting rod (251); the first shaft sleeve (240) is provided with internal threads, the rotating shaft (210) is provided with external threads, and when the driving wheel (230) drives the rotating shaft (210) to rotate, the external threads are meshed with the internal threads, so that the first shaft sleeve (240) moves along the axial direction of the rotating shaft (210);

the bed body (100) further comprises a third supporting plate (140), the third supporting plate (140) is arranged on the other side of the second supporting plate (120) relative to the first supporting plate (110), and the third supporting plate (140) is hinged with the second supporting plate (120); a second sleeve (260) is sleeved on the rotating shaft (210), and the second sleeve (260) is connected with the third supporting plate (140) through a second connecting rod (252); the second shaft sleeve (260) is provided with internal threads, when the driving wheel (230) drives the rotating shaft (210) to rotate, the external threads and the internal threads are meshed with each other, so that the second shaft sleeve (260) moves along the axial direction of the rotating shaft (210), wherein the first shaft sleeve (240) and the second shaft sleeve (260) are respectively positioned at two sides of the matched gear (220) along the axial direction of the rotating shaft (210);

the second driving unit comprises a supporting seat, and the supporting seat comprises a connecting section and a limiting section (312); the connecting section is fixedly connected with the first supporting plate B (112), and the limiting section (312) bears the first supporting plate A (111) and is used for limiting the first supporting plate A (111) to rotate under the action of self gravity;

the second driving unit further comprises a telescopic cylinder (320), and when the first driving unit drives the first supporting plate (110) to rotate, the first shaft sleeve (240) is close to the telescopic cylinder (320) along the axial direction of the rotating shaft (210); the telescopic cylinder (320) is provided with a triggering structure at one side close to the first shaft sleeve (240), the triggering structure comprises two electric connection points (321) which are arranged at intervals, and the electric connection points (321) are communicated with the telescopic cylinder (320) through a power supply circuit; one side of the first shaft sleeve (240) close to the telescopic cylinder (320) is provided with a conducting strip, when the first shaft sleeve (240) moves to the farthest end far away from the matched gear (220) along the axial direction of the rotating shaft (210), the conducting strip is in contact with the electric connection point (321) to realize the communication of the power supply circuit, so that the telescopic cylinder is driven to stretch and retract, and the first supporting plate A (111) is driven to rotate.

2. The assisted breathing apparatus of claim 1 wherein the first axis of rotation and the second axis of rotation are disposed perpendicular to each other.

3. A assisted breathing apparatus for heart failure based patient use according to claim 2, wherein the first support plate (110) is the same width as the second support plate (120); the first support plate A (111) and the first support plate B (112) have the same width, and are 1/2 of the width of the first support plate (110).

4. The assisted breathing apparatus for heart failure based patient use according to claim 1, wherein the bed (100) further comprises support legs (130), the support legs (130) being provided with universal wheels for enabling movement of the bed (100).

5. The assisted breathing apparatus for heart failure based patient use according to claim 1, wherein the second support plate (120) is a telescopic plate, the second support plate (120) being capable of effecting a relative distance change between the hinged side of the second support plate (120) and the first support plate (110) and the opposite side by adjustment.