CN113090911A

CN113090911A - Instrument fixing device based on split type elastic connection

Info

Publication number: CN113090911A
Application number: CN202110364647.2A
Authority: CN
Inventors: 刘艳华; 韩春祥; 缪连双
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-07-09

Abstract

The invention relates to the technical field of split type fixing mechanisms, in particular to a fixing device for an instrument based on split type elastic connection. The device comprises a fixing mechanism, wherein the fixing mechanism at least comprises a combining device, the combining device is in two groups which are oppositely arranged, the combining device comprises a combining plate, an upper combining plate and a lower combining plate which are symmetrically arranged are arranged at the inner end part of the opening side of the combining plate, the upper combining plate and the lower combining plate are in two groups which are symmetrically arranged, the upper combining plate and the lower combining plate are fixedly connected through a screw rod, the screw rod is in threaded connection with the upper combining plate, and the lower combining plate and the combining plate are arranged in a welding manner; closing device, closing device include the fixed block, and the fixed block is installed on the surface of last doubling plate, and a tip of fixed block is installed and is the dead lever of "N" shape, and the bottom end of dead lever is provided with the briquetting, and the surface of briquetting is equidistant to be provided with the tight piece that pastes of a plurality of toper structure. The split type instrument can be combined and fixed through the combining device, and then the fixing effect is enhanced through the pressing device.

Description

Instrument fixing device based on split type elastic connection

Technical Field

The invention relates to the technical field of split type fixing mechanisms, in particular to a fixing device for an instrument based on split type elastic connection.

Background

Split-type, refers to an instrument device having two or more monolithic structures. In the prior split-type instruments, a split-type instrument is included, wherein the split-type instrument has certain convenient operability for certain specific mechanical engineering.

When fixed to the instrument of split type structure, adopt monomer formula rigidity usually, when two or more instruments need place its combination use, adopt bolt fixed mounting now, and then difficult to dismantle and separate. Secondly, because of the fixed mounting of bolt, can be too big to instrument fixed time pressure, cause the damage, influence the use. In view of this, we propose a fixing device based on a split type elastic connection instrument to solve the existing problems.

Disclosure of Invention

The invention aims to provide a fixing device for an instrument based on split type elastic connection, which aims to solve the problems in the background technology.

In order to achieve the above object, the present invention provides a fixing device for an instrument based on a split type elastic connection, including a fixing mechanism, where the fixing mechanism at least includes:

the combining device comprises combining plates, the combining plates are of an arc structure with an opening facing one side, symmetrical upper combining plates and symmetrical lower combining plates are arranged at the inner end parts of the opening sides of the combining plates, the upper combining plates and the lower combining plates are symmetrically arranged, the upper combining plates are matched with the lower combining plates in structure, the upper combining plates are fixedly connected with the lower combining plates through screw rods, the screw rods are in threaded connection with the upper combining plates, the lower combining plates are in welded arrangement with the combining plates, and handles are arranged at the end parts of the screw rods;

when the combining device is used specifically, the combining plates are arranged oppositely, the instruments of the split type structure are respectively arranged in the upper combining plate and the lower combining plate and are fixedly supported through the fixed welding of the lower combining plate, meanwhile, when the sizes of the instruments are different, the handles are rotated and are connected through the joint of the upper combining plate and the combining plate, when the lead screws are rotated, the upper combining plate is shifted downwards or upwards, so that the instruments which are difficult to be different in size can be fixedly clamped, the instruments of the split type structure are combined and fixed, meanwhile, the fastening springs are arranged between the opposite upper combining plates, and the fixing effect on the two upper combining plates can be enhanced.

The pressing device is installed on the outer side of the surface of the upper combining plate and comprises a fixed block, the fixed block is installed on the surface of the upper combining plate, an N-shaped fixed rod is installed at one end of the fixed block, the middle of the fixed rod protrudes out of the end of the upper combining plate, a pressing block is arranged at the tail of the bottom end of the fixed rod, a plurality of tightly attached blocks with conical structures are arranged on the surface of the pressing block at equal intervals, and the tightly attached blocks are made of rubber;

when the pressing device is used specifically, the fixing block is fixedly arranged on the surface of the upper combining plate, the side end part of the instrument can be attached and fixed for the second time through the N-shaped fixing rod and the pressing block at the tail end part of the N-shaped fixing rod, and the arranged fastening block is made of an optimal rubber material, so that a certain protection effect is achieved on electronic equipment, and further the electronic instrument is protected.

As the further improvement of this technical scheme, the side rail has all been seted up to the opening side medial extremity of combining plate, the tip of going up the combining plate is provided with the side lever, the side lever with the side rail is sliding connection.

As a further improvement of the technical scheme, inner cavities are formed in the surface of the opening side of the combining plate at equal intervals, and a protruding block is arranged at one end of the upper combining plate and is in sliding connection with the inner cavities.

As a further improvement of the technical scheme, an upper guide rail is arranged on the surface of the upper combining plate, the fixing block is of a T-shaped structure, and the fixing block is in clamping fit with the upper guide rail.

As a further improvement of the technical scheme, a transverse plate is arranged on the surface of the middle of the fixing rod, a movable mechanism is arranged at one end of the upper combining plate and comprises a rectangular fixing clamping bin with an outward opening, the fixing clamping bin and the transverse plate are horizontally arranged oppositely, a fixing cam is connected to the fixing clamping bin in a rotating mode, and a fixing motor is arranged at the upper end of the fixing cam.

As a further improvement of the technical scheme, a through hole penetrating through the lower parallel plate is formed in the side end of the lower parallel plate, and the through hole is opposite to a heat dissipation device arranged between the through holes, and the heat dissipation device comprises a rectangular fixing plate with an upward opening.

As a further improvement of the technical solution, a cooling pad installed through a bolt is arranged inside the fixing plate, the cooling pad is made of cotton material, a circulating mechanism is arranged right below the cooling pad, the circulating mechanism comprises a movable rack, a fixed gear is meshed and connected to one end of the movable rack, a circulating motor is rotatably connected to the inside of the fixed gear, and an offset block is arranged at one end of the surface of the movable rack and used for sliding and protruding the cooling pad.

As a further improvement of the technical scheme, a return spring is installed at one end part of the movable rack, a return fixed plate is arranged at one end part of the return spring, and the return fixed plate is fixedly installed on the surface of the fixed plate.

As a further improvement of the technical scheme, a supporting mechanism is arranged right below the combining device and comprises a supporting plate, supporting blocks are symmetrically arranged at the front sensitive end of the supporting plate, two connecting blocks are hinged to the surface of each supporting block, the connecting blocks are arranged in two groups which are oppositely arranged from top to bottom, the end of each connecting block is hinged to the surface of the combining plate, and the hinged positions of the two groups of connecting blocks are rotatably connected through connecting rods.

Compared with the prior art, the invention has the beneficial effects that:

1. this based on split type elastic connection instrument fixing device, through the instrument with split type structure arrange in respectively and go up the doubler and down inside the doubler, through the fixed welding of doubler down, so that the instrument can obtain the outrigger fixed, simultaneously when the size of instrument is different, through rotating the handle, through going up the doubler and being connected with the laminating of doubler, rotate as the lead screw, and then go up the doubler and downwards or upwards squint, so that can carry out fixing clip to the instrument of difficult not unidimensional, and then the instrument of components of a whole that can function independently structure is merged fixedly, be provided with fastening spring simultaneously between the relative last doubler, can strengthen to the fixed action of two last doublers.

2. This based on split type elastic connection instrument fixing device, through fixed motor access power, adjust rotational speed to slow to fixed cam rotates, and the skew takes place for fixed cam's one end extrusion diaphragm promptly, closes the power when reaching the position of needs, even the position that makes the dead lever changes, and then makes terminal briquetting synchronous change, practices thrift the promotion of manpower and adjusts.

3. In this fixing device based on split type elastic connection instrument, through the automatically regulated of fixed cam, synchronous skew takes place for the fixed block, again through the welding setting of fixed end plate, the taut fixed block of fixed spring for the position of dead lever obtains stable fastening, strengthens the fixity.

4. This based on split type elastic connection instrument fixing device, be located the basal surface of fixed plate and be connected with the rotation of fixed gear through circulating motor to insert the power with circulating motor, movable rack skew promptly, and then the skew piece on surface carries out protruding supporting role to the cooling pad of top, so that carry out the enhancement of radiating effect to square instrument, strengthen the life of instrument.

5. This based on split type elastic connection instrument fixing device, through the connecting block with and the articulated of plywood to whole device utensil backup pad that closes produces certain high distance, strengthens once more to the heat dissipation of whole device, and secondly, the interval of relative device that closes obtains controllable regulation, and the connection between the wire of being convenient for prevents the winding.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is an exploded view of the fixing mechanism of embodiment 1;

FIG. 3 is a schematic structural view of a coalescing apparatus according to embodiment 1;

FIG. 4 is a partial structural view of a composite board according to embodiment 1;

FIG. 5 is a schematic structural view of an upper plate and a lower plate of embodiment 1;

FIG. 6 is a schematic view of the construction of a pressing apparatus according to embodiment 1;

FIG. 7 is a schematic view of a compact structure of example 1;

FIG. 8 is a schematic view of the structure of the moving mechanism of embodiment 1;

fig. 9 is a schematic structural view of the heat dissipation device of embodiment 1;

FIG. 10 is a schematic view of the structure of the circulating mechanism of embodiment 1;

fig. 11 is a partial structural schematic view of the support mechanism of embodiment 1.

The various reference numbers in the figures mean:

100. a fixing mechanism;

110. a merging device; 111. combining plates; 1111. side rails; 1112. an inner cavity; 112. upper plate combination; 1121. a side lever; 1122. a bump; 1123. an upper guide rail; 113. a screw rod; 1130. a handle; 114. lower combining plates; 1140. a port; 115. a fastening spring;

120. a pressing device; 121. a fixed block; 122. fixing the rod; 123. a transverse plate; 124. briquetting; 1240. tightly pasting the block; 125. a movable mechanism; 1251. fixing the card bin; 1252. a fixed cam; 1253. fixing a motor; 126. fixing the spring; 127. fixing the end plate;

130. a heat sink; 131. a fixing plate; 132. a cooling pad; 133. a circulating mechanism; 1331. a movable rack; 1332. fixing a gear; 1333. a circulating motor; 1334. an offset block; 1335. a return spring; 1336. returning to the fixed plate;

140. a support mechanism; 141. a support plate; 142. a support block; 143. connecting blocks; 144. a connecting rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1

Referring to fig. 1 to 11, the present embodiment provides a fixing device for a meter based on a split type elastic connection, which includes a fixing mechanism 100, where the fixing mechanism 100 at least includes:

the combining device 110 is provided with two groups of oppositely arranged combining devices 110, each combining device 110 comprises a combining plate 111, each combining plate 111 is of an arc-shaped structure with an opening facing one side, an upper combining plate 112 and a lower combining plate 114 which are symmetrical are arranged at the inner end part of the opening side of each combining plate 111, the upper combining plate 112 and the lower combining plate 114 are symmetrically arranged in two groups, the upper combining plate 112 is matched with the lower combining plate 114 in structure, the upper combining plate 112 is fixedly connected with the lower combining plate 114 through a screw rod 113, the screw rod 113 is in threaded connection with the upper combining plate 112, the lower combining plate 114 is welded with the combining plate 111, and handles 1130 are arranged at the end parts of the screw rods 113;

when the combining device 110 of the invention is used specifically, the combining plates 111 are arranged oppositely, the instruments in the split structure are respectively arranged inside the upper combining plate 112 and the lower combining plate 114, and are fixedly welded through the lower combining plate 114, so that the instruments can be stably supported and fixed, meanwhile, when the sizes of the instruments are different, the handles 1130 are rotated, and are connected with the combining plates 111 through the joint of the upper combining plate 112 and the combining plates 112, when the screw rods 113 rotate, the upper combining plate 112 deflects downwards or upwards, so that the instruments which are difficult to be in different sizes can be fixedly clamped, further the instruments in the split structure are combined and fixed, meanwhile, the fastening springs 115 are arranged between the opposite upper combining plates 112, and the fixing effect on the two upper combining plates 112 can be enhanced.

The pressing device 120 is installed on the outer side of the surface of the upper combining plate 112, the pressing device 120 comprises a fixing block 121, the fixing block 121 is installed on the surface of the upper combining plate 112, an N-shaped fixing rod 122 is installed at one end of the fixing block 121, the middle of the fixing rod 122 protrudes out of the end of the upper combining plate 112, a pressing block 124 is arranged at the tail end of the bottom end of the fixing rod 122, a plurality of clinging blocks 1240 with conical structures are arranged on the surface of the pressing block 124 at equal intervals, and the clinging blocks 1240 are made of rubber;

when the pressing device 120 of the present invention is used specifically, the fixing block 121 is fixedly installed on the surface of the upper combining plate 112, and the side end portion of the instrument can be attached and fixed for the second time through the N-shaped fixing rod 122 and the pressing block 124 at the end portion thereof, wherein the arranged clinging block 1240 uses a preferable rubber material, so as to have a certain protection effect on the electronic equipment, and further protect the electronic instrument.

In order to solve the problem that the upper combining plate 112 may be unstable when moving, side rails 1111 are formed at inner side ends of the opening side of the combining plate 111, side rods 1121 are formed at ends of the upper combining plate 112, the side rods 1121 are slidably connected to the side rails 1111 and connected to pads of the side rails 1111 through the side rods 1121, so that the upper combining plate 112 can stably move downward or upward when the upper combining plate is rotationally displaced by the screw 113.

In order to solve the problem that the movement speed of the upper parallel plate 112 is affected by excessive movement friction force, the inner cavities 1112 are formed in the opening side surface of the parallel plate 111 at equal intervals, a protruding block 1122 is arranged at one end of the upper parallel plate 112, the protruding block 1122 is in sliding connection with the inner cavity 1112, the upper parallel plate 112 can move more conveniently through the sliding connection of the protruding block 1122 and the inner cavity 1112, the friction force is reduced, and the movement is more stable.

In order to solve the problem that the fixed position of the fixing rod 122 cannot be used for instruments with different sizes and widths after being fixed and installed, the upper guide rail 1123 is arranged on the surface of the upper combining plate 112, the fixing block 121 is in a T-shaped structure, the fixing block 121 is in clamping fit with the upper guide rail 1123, and through the clamping fit of the fixing block 121 and the upper guide rail 1123, the fixing block 121 slides inside the upper guide rail 1123, so that the position of the fixing rod 122 is changed back and forth, the position of the pressing block 124 at the tail end portion is changed synchronously, and the fixed effect of various states can be achieved for instruments with different sizes.

In order to solve the problem that the position deviation of the fixing rod 122 needs to be adjusted manually, a horizontal plate 123 is arranged on the surface of the middle part of the fixing rod 122, a movable mechanism 125 is arranged at one end part of the upper combining plate 112, the movable mechanism 125 comprises a rectangular fixing card chamber 1251 with an outward opening, the fixing card chamber 1251 is horizontally arranged opposite to the horizontal plate 123, a fixing cam 1252 is rotatably connected inside the fixing card chamber 1251, a fixing motor 1253 is arranged at the upper end part of the fixing cam 1252 and is rotatably connected with the fixing cam 1252 through the fixing motor 1253, the fixing card chamber 1251 is fixedly installed with the end part of the upper combining plate 112, the fixing motor 1253 can be connected with a power supply, the rotating speed is adjusted to be slow, so that the fixing cam 1252 rotates, namely, one end of the fixing cam 1252 presses the horizontal plate 123 to generate deviation, the power supply is turned off when reaching the required position, namely, the position of the fixing, manpower-saving pushing adjustment.

In order to enhance the position fixing effect of the fixing rod 122, the other end of the fixing block 121 is provided with a fixing spring 126, one end of the fixing spring 126 is provided with a fixing end plate 127, the fixing end plate 127 is welded and fixed with the upper combining plate 112, the fixing block 121 is synchronously deviated through the arrangement of the movable mechanism 125 and the automatic adjustment of the fixing cam 1252, and then the fixing block 121 is tensioned by the fixing spring 126 through the welding arrangement of the fixing end plate 127, so that the position of the fixing rod 122 is stably fastened, and the fixing property is enhanced.

In order to solve and close device 110 after fixed to the instrument, dustproof problem of difficult heat dissipation of bottom on one side, open the opening 1140 that runs through down parallel plate 114 is seted up in the side of parallel plate 114 down, be provided with heat abstractor 130 between the relative opening 1140, heat abstractor 130 is including being the ascending rectangle fixed plate 131 of opening, the ascending fixed plate 131 of opening through setting up can make when the centre gripping of carrying out the instrument is fixed, the instrument has certain heat because of long-time work, and then can carry out certain air exhausting effect through the opening of fixed plate 131, secondly advance fixed plate 131 and be located the bottom, have certain dustproof effect to the instrument.

In order to solve the problem that the heat dissipation effect of the fixing plate 131 may be poor and the life may not be prolonged, the cooling pad 132 installed via bolts is disposed inside the fixing plate 131, the cooling pad 132 is made of cotton, the circulation mechanism 133 is disposed right below the cooling pad 132, the circulation mechanism 133 includes a movable rack 1331, one end of the movable rack 1331 is engaged with a fixed gear 1332, a circulation motor 1333 is rotatably connected inside the fixed gear 1332, one end of the surface of the movable rack 1331 is provided with a deviation block 1334, the deviation block 1334 is used for sliding protrusion of the cooling pad 132, the circulation motor 1333 is disposed on the bottom surface of the fixing plate 131 and rotatably connected with the fixed gear 1332, so that the circulation motor 1333 is powered on, that is, the movable rack 1331 is deviated, and the deviation block 1334 on the surface performs protrusion supporting effect on the cooling pad 132 above, so as to enhance the heat dissipation effect on a square instrument, enhance the service life of the meter.

In order to solve the problem that the movable rack 1331 is not easy to return when moving to one end and the direction of the circulating motor 1333 needs to be adjusted again, a return spring 1335 is installed at one end of the movable rack 1331, a return fixed plate 1336 is arranged at one end of the return spring 1335, the return fixed plate 1336 is fixedly installed on the surface of the fixed plate 131, when the movable rack 1331 slides to one end, the circulating motor 1333 is closed, and the return spring 1335 acts to pull back the movable rack 1331, so that the circulating action is achieved.

In order to solve the problem that the combination device 110 may directly contact the ground to affect the use effect of the instrument, a support mechanism 140 is disposed right below the combination device 110, the support mechanism 140 includes a support plate 141, support blocks 142 are symmetrically disposed on the apparent sensitive end portions of the support plates 141, two connection blocks 143 are hinged to the surface of the support blocks 142, the connection blocks 143 are disposed in two groups which are opposite to each other, the end portion of each connection block 143 is hinged to the surface of the combination plate 111, the hinged portions of the two groups of connection blocks 143 are rotatably connected by a connection rod 144 and hinged to the combination plate 111 by the connection blocks 143, so that the whole combination device 110 has a certain height distance with the support plate 141, the heat dissipation of the whole device is enhanced again, secondly, the distance between the opposite combination devices 110 is controllably adjusted to facilitate the connection between wires and prevent twisting, and finally, a sliding wheel is mounted at the bottom of the device, the mobile use of the operator is convenient.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Based on split type elastic connection instrument fixing device, its characterized in that: comprising a fixing mechanism (100), said fixing mechanism (100) comprising at least:

the combining device (110) is provided with two groups which are oppositely arranged, the combining device (110) comprises a combining plate (111), the combining plate (111) is of an arc structure with an opening towards one side, an upper combining plate (112) and a lower combining plate (114) which are symmetrical are arranged at the inner end part of the opening side of the combining plate (111), the upper combining plate (112) and the lower combining plate (114) are symmetrically arranged, the upper combining plate (112) is matched with the lower combining plate (114) in structure, the upper combining plate (112) is fixedly connected with the lower combining plate (114) through a screw rod (113), the screw rod (113) is in threaded connection with the upper combining plate (112), the lower combining plate (114) is welded with the combining plate (111), and handles (1130) are arranged at the end parts of the screw rod (113);

closing device (120), closing device (120) are installed go up the surperficial outside of doubling plate (112), closing device (120) include fixed block (121), fixed block (121) are installed go up the surface of doubling plate (112), dead lever (122) that are "N" shape are installed to a tip of fixed block (121), the tip of doubling plate (112) is gone up in the middle part protrusion of dead lever (122), the bottom end of dead lever (122) is provided with briquetting (124), the surface of briquetting (124) is equidistant to be provided with the tight piece (1240) of a plurality of toper structure, tight piece (1240) adopt rubber material.

2. The split elastic connection instrument-based fixing device of claim 1, wherein: side rail (1111) have all been seted up to the opening side medial extremity of combining board (111), the tip of going up and combining board (112) is provided with side lever (1121), side lever (1121) with side rail (1111) are sliding connection.

3. The split elastic connection instrument-based fixing device of claim 1, wherein: inner cavities (1112) are formed in the opening side surface of the combining plate (111) at equal intervals, a protruding block (1122) is arranged at one end of the upper combining plate (112), and the protruding block (1122) is connected with the inner cavities (1112) in a sliding mode.

4. The split elastic connection instrument-based fixing device of claim 1, wherein: an upper guide rail (1123) is arranged on the surface of the upper parallel plate (112), the fixing block (121) is of a T-shaped structure, and the fixing block (121) is in clamping fit with the upper guide rail (1123).

5. The split elastic connection instrument-based fixing device of claim 4, wherein: the middle part surface of dead lever (122) is provided with diaphragm (123), a tip of going up and combining board (112) is provided with movable mechanism (125), movable mechanism (125) are including outside rectangle fixing clip storehouse (1251) of opening, fixing clip storehouse (1251) with diaphragm (123) are the level and set up relatively, the internal rotation of fixing clip storehouse (1251) is connected with fixed cam (1252), the upper end of fixed cam (1252) is provided with fixed motor (1253).

6. The split elastic connection instrument-based fixing device of claim 1, wherein: the other end of fixed block (121) is provided with fixed spring (126), a tip of fixed spring (126) is provided with fixed end plate (127), fixed end plate (127) with go up and plate (112) welded fastening.

7. The split elastic connection instrument-based fixing device of claim 1, wherein: the side end of the lower parallel plate (114) is internally provided with a through hole (1140) which penetrates through the lower parallel plate (114), a heat dissipation device (130) is arranged between the through holes (1140), and the heat dissipation device (130) comprises a rectangular fixing plate (131) with an upward opening.

8. The split elastic connection instrument-based fixing device of claim 7, wherein: the bolt-mounted cooling pad (132) is arranged in the fixing plate (131), the cooling pad (132) is made of cotton materials, a circulating mechanism (133) is arranged right below the cooling pad (132), the circulating mechanism (133) comprises a movable rack (1331), one end of the movable rack (1331) is connected with a fixed gear (1332) in a meshed mode, a circulating motor (1333) is connected to the fixed gear (1332) in a rotating mode, one end of the surface of the movable rack (1331) is provided with a deviation block (1334), and the deviation block (1334) is used for protruding sliding of the cooling pad (132).

9. The split elastic connection instrument-based fixing device of claim 8, wherein: a return spring (1335) is installed at one end of the movable rack (1331), a return fixed plate (1336) is arranged at one end of the return spring (1335), and the return fixed plate (1336) is fixedly installed on the surface of the fixed plate (131).

10. The split elastic connection instrument-based fixing device of claim 1, wherein: a supporting mechanism (140) is arranged right below the combining device (110), the supporting mechanism (140) comprises a supporting plate (141), supporting blocks (142) are symmetrically arranged at the apparent sensitive end parts of the supporting plate (141), two connecting blocks (143) are hinged to the surface of the supporting blocks (142), the connecting blocks (143) are arranged in two groups which are vertically and oppositely arranged, the end part of each group of the connecting blocks (143) is hinged to the surface of the combining plate (111), and the hinged parts of the two groups of the connecting blocks (143) are rotatably connected through a connecting rod (144).