CN210531497U

CN210531497U - Inductance type ballast capable of reducing vibration intensity

Info

Publication number: CN210531497U
Application number: CN201920390535.2U
Authority: CN
Inventors: 王新明; 张锡平
Original assignee: WUXI AINUOTAI ENERGY TECHNOLOGY CO LTD
Current assignee: WUXI AINUOTAI ENERGY TECHNOLOGY CO LTD
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-05-15
Anticipated expiration: 2029-03-26

Abstract

The utility model discloses a can reduce induction type ballast of intensity of vibration belongs to the ballast field, an induction type ballast that can reduce intensity of vibration, including induction type ballast main part, the equal fixedly connected with bottom plate in the left and right sides of induction type ballast main part, two the equal fixedly connected with connection terminal in top of bottom plate, two four inductance coils of the equal fixedly connected with in top of connection terminal, the bottom of induction type ballast main part is provided with the mounting panel. Through the setting of damper can effectually play absorbing effect to inductance type ballast main part and connection terminal inductance coils, avoid because the situation that the part damaged or dropped takes place for vibrations, influence the holistic result of use of inductance type ballast, through mutually supporting of mounting groove, first locating piece, second locating piece and buffer, can effectually offset the vibrations power that inductance type ballast main part received, further play absorbing effect.

Description

Inductance type ballast capable of reducing vibration intensity

Technical Field

The utility model relates to a ballast field, more specifically say, relate to an inductance type ballast that can reduce intensity of vibrations.

Background

An inductive ballast (inductive ballast) is a ferrite core inductive coil, and the nature of inductance is such that when the current in the coil changes, a change in magnetic flux will be induced in the coil, thereby generating an induced electromotive force in a direction opposite to the direction of the change in current, thereby blocking the change in current.

Along with the gradual improvement of road lighting construction, more financial burden is brought to governments at all levels, a series of energy-saving and electricity-saving measures adopted in recent years also achieve obvious effects, wherein the effect of the inductive ballast is unavailable, however, due to the fact that the existing inductive ballast lacks of a mechanism capable of reducing the vibration strength, when the inductive ballast is actually used, the situation that internal parts are damaged or fall off frequently occurs due to stress and vibration, and the whole using effect of the inductive ballast is influenced.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a can reduce the inductance type ballast of intensity of vibration possesses the advantage that can reduce intensity of vibration, has solved current inductance type ballast because lack the mechanism that can reduce intensity of vibration, when the in-service use, if the atress vibrations often can take place the situation that internals damaged or dropped, influences the problem of the holistic result of use of inductance type ballast.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a can reduce shock strength's inductance type ballast, includes inductance type ballast main part, the equal fixedly connected with bottom plate in the left and right sides of inductance type ballast main part, two the equal fixedly connected with wire holder in top of bottom plate, two four inductance coils of the equal fixedly connected with in top of wire holder, the bottom of inductance type ballast main part is provided with the mounting panel, two the bottom of bottom plate and the top that is located the mounting panel all are provided with evenly distributed's damper.

The mounting groove that the equidistance was arranged is seted up at the top of mounting panel, the first locating piece of the equal fixedly connected with in the left and right sides of diapire in the mounting groove, the bottom of inductance type ballast main part corresponds every first locating piece equal fixedly connected with second locating piece, two be provided with buffer between first locating piece and two second locating pieces, the first damping spring that the top fixedly connected with equidistance of mounting panel was arranged, first damping spring's top and inductance type ballast main part's bottom fixed connection, adjacent two first damping spring is located buffer's the left and right sides respectively.

Preferably, damper includes two rubber slabs, two one side that the rubber slab deviates from respectively with the bottom of bottom plate and the top fixed connection of mounting panel, two be provided with the rubber shock absorber post between the rubber slab, the top and the bottom of rubber shock absorber post respectively with the opposite side fixed connection of two rubber slabs, two set up and be located the second damping spring of the outside fixedly connected with evenly distributed of rubber shock absorber post between the rubber slab, the top and the bottom of second damping spring respectively with the opposite side fixed connection of two rubber slabs, the quantity of second damping spring is four at least.

Preferably, the buffering device comprises a first sliding rod, the left end and the right end of the first sliding rod are respectively fixedly connected with the opposite sides of the two first positioning blocks, a second sliding rod is arranged above the first sliding rod, the left end and the right end of the second sliding rod are respectively fixedly connected with the opposite sides of the two second positioning blocks, the first sliding rod is sleeved with two first movable blocks which are symmetrically distributed, the second sliding rod is sleeved with two second movable blocks which are symmetrically distributed, the two second movable blocks are respectively positioned right above the two first movable blocks, an X cross rod is arranged between the two first movable blocks and the two second movable blocks, the two ends of the bottom of the X cross rod are respectively hinged with the tops of the two first movable blocks, the two ends of the top of the X cross rod are respectively hinged with the bottoms of the two second movable blocks, and the first sliding rod and the second sliding rod are both sleeved with two buffering springs, the two opposite ends of the buffer springs on the first slide bar are fixedly connected with the opposite sides of the two first movable blocks respectively, the two opposite ends of the buffer springs on the first slide bar are fixedly connected with the opposite sides of the two first positioning blocks respectively, the two opposite ends of the buffer springs on the second slide bar are fixedly connected with the opposite sides of the two second movable blocks respectively, and the two opposite ends of the buffer springs on the second slide bar are fixedly connected with the opposite sides of the two second positioning blocks respectively.

Preferably, the top of the first positioning block is provided with a groove, and the groove is matched with the second positioning block.

Preferably, two the equal first slider of fixedly connected with in bottom of first movable block, first spout has been seted up to the inner diapire of mounting groove, two first slider respectively with the inside sliding connection of first spout.

Preferably, the top of the second movable block is fixedly connected with a second sliding block, the bottom of the inductive ballast main body is provided with a second sliding groove, and the second sliding blocks are respectively connected with the inside of the second sliding groove in a sliding manner.

Preferably, extension springs are sleeved on the first sliding rod and the second sliding rod, the left end and the right end of each extension spring on the first sliding rod are fixedly connected with the opposite sides of the two first movable blocks respectively, and the left end and the right end of each extension spring on the second sliding rod are fixedly connected with the opposite sides of the two second movable blocks respectively.

Preferably, the cross sections of the first sliding rod and the second sliding rod are both rectangular, and the first movable block and the second movable block are respectively matched with the first sliding rod and the second sliding rod.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) this scheme can effectually play absorbing effect to inductance type ballast main part and connection terminal inductance coils through damper's setting, avoid because the situation that part damage or drop takes place for vibrations, influence the holistic result of use of inductance type ballast, through the mounting groove, first locating piece, the mutually supporting of second locating piece and buffer, can effectually offset the vibrations power that inductance type ballast main part received, and then play absorbing effect, can further slow down the holistic shock intensity of inductance type ballast through first damping spring at last, further avoid because the situation that part damage or drop takes place for vibrations, influence the holistic result of use of inductance type ballast.

(2) When inductance type ballast main part and bottom plate atress vibrations, use through rubber slab, rubber shock absorber post and second damping spring's cooperation, can drive rubber shock absorber post and second damping spring and take place deformation, and then offset the power of vibrations, the effectual absorbing effect that plays sets up the quantity of second damping spring for four at least and evenly distributed simultaneously, can effectively strengthen the effect that reduces the intensity of vibrations.

(3) When the compression buffering device is compressed in a vibration mode, the X cross rod can be driven to compress, two ends of the bottom of the X cross rod respectively push the two first movable blocks to slide back on the first sliding rod, and meanwhile two ends of the top of the X cross rod respectively push the two second movable blocks to slide back on the second sliding rod, so that the buffering spring is extruded, the buffering spring deforms, the elastic force of the buffering spring can effectively block the transmission of vibration, and the vibration strength of the inductive ballast main body is reduced.

(4) When the inductance type ballast main part shakes to the mounting groove direction on the mounting panel, through setting up recess and second locating piece on the first locating piece into looks adaptation, can make first locating piece and second locating piece pass through the recess block to when avoiding inductance type ballast main part atress, take place the vibrations of other directions.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of the present invention shown in FIG. 1;

FIG. 3 is an enlarged view of the point A in FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the point B in FIG. 2 according to the present invention;

fig. 5 is a perspective view of the middle damping mechanism of the present invention;

fig. 6 is a perspective view of the first positioning block and the second positioning block of the present invention;

fig. 7 is a perspective view of the connection between the second sliding rod and the second movable block of the present invention.

The reference numbers in the figures illustrate:

1. an inductive ballast body; 2. a base plate; 3. a wire holder; 4. an inductor coil; 5. mounting a plate; 6. a damping mechanism; 61. a rubber plate; 62. a rubber shock absorbing column; 63. a second damping spring; 7. mounting grooves; 8. a first positioning block; 9. a second positioning block; 10. a buffer device; 101. a first slide bar; 102. a second slide bar; 103. a first movable block; 104. a second movable block; 105. an X-cross bar; 106. a buffer spring; 11. a damping spring; 12. a groove; 13. a first slider; 14. a first chute; 15. a second slider; 16. a second chute; 17. a tension spring.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-7, an inductive ballast capable of reducing vibration intensity includes an inductive ballast main body 1, bottom plates 2 are fixedly connected to left and right sides of the inductive ballast main body 1, wire holders 3 are fixedly connected to tops of the two bottom plates 2, four inductive coils 4 are fixedly connected to tops of the two wire holders 3, a mounting plate 5 is disposed at a bottom of the inductive ballast main body 1, mounting holes are disposed at four corners of a top of the mounting plate 5, so as to facilitate mounting of the inductive ballast main body 1, damping mechanisms 6 are uniformly distributed at bottoms of the two bottom plates 2 and at tops of the mounting plate 5, the arrangement of the damping mechanism 6 can effectively play a damping role in the inductance coil 4 of the inductance type ballast main body 1 and the wire holder 3, and the influence on the overall use effect of the inductance type ballast caused by the condition that parts are damaged or fall due to vibration is avoided.

The top of the mounting plate 5 is provided with mounting grooves 7 which are arranged equidistantly, the left side and the right side of the bottom wall in the mounting groove 7 are fixedly connected with first positioning blocks 8, the bottom of the inductive ballast main body 1 is fixedly connected with second positioning blocks 9 corresponding to each first positioning block 8, a buffer device 10 is arranged between each first positioning block 8 and each second positioning block 9, the top of the mounting plate 5 is fixedly connected with first damping springs 11 which are arranged equidistantly, the top of each first damping spring 11 is fixedly connected with the bottom of the inductive ballast main body 1, two adjacent first damping springs 11 are respectively positioned at the left side and the right side of the buffer device 10, through the mutual matching of the mounting groove 7, the first positioning block, the second positioning block 9 and the buffer device 10, the vibration force applied to the inductive ballast main body 1 can be effectively counteracted, and then play the effect of absorbing shock, can further slow down the holistic intensity of shaking of inductance type ballast through first damper spring 11 at last.

Further, the damping mechanism 6 comprises two rubber plates 61, one side of each of the two rubber plates 61, which is away from the other side, is fixedly connected to the bottom of the bottom plate 2 and the top of the mounting plate 5, a rubber damping column 62 is arranged between the two rubber plates 61, the top and the bottom of the rubber damping column 62 are fixedly connected to the opposite sides of the two rubber plates 61, second damping springs 63 are uniformly distributed and fixedly connected to the outer sides of the two rubber plates 61 and located on the rubber damping column 62, the top and the bottom of the second damping springs 63 are fixedly connected to the opposite sides of the two rubber plates 61, the number of the second damping springs 63 is at least four, when the inductive ballast body 1 and the bottom plate 2 are subjected to a force vibration, the rubber damping columns 62 and the second damping springs 63 are driven to deform by the cooperation of the rubber plates 61, the rubber damping columns and the second damping springs 63, so as to offset the force of the vibration, effectual absorbing effect that plays sets up second damping spring 63's quantity simultaneously for four and evenly distributed at least, can effectively strengthen the effect that reduces shock strength.

Further, the buffering device 10 includes a first sliding rod 101, the left and right ends of the first sliding rod 101 are respectively and fixedly connected with the opposite sides of the two first positioning blocks 8, a second sliding rod 102 is disposed above the first sliding rod 101, the left and right ends of the second sliding rod 102 are respectively and fixedly connected with the opposite sides of the two second positioning blocks 9, two first movable blocks 103 which are symmetrically distributed are sleeved on the first sliding rod 101, two second movable blocks 104 which are symmetrically distributed are sleeved on the second sliding rod 102, the two second movable blocks 104 are respectively located right above the two first movable blocks 103, an X-shaped cross rod 105 is disposed between the two first movable blocks 103 and the two second movable blocks 104, the two ends of the bottom of the X-shaped cross rod 105 are respectively hinged with the tops of the two first movable blocks 103, the two ends of the top of the X-shaped cross rod 105 are respectively hinged with the bottoms of the two second movable blocks 104, two buffering springs 106 are sleeved on the first sliding rod 101 and the second sliding rod 102, the opposite ends of the two buffer springs 106 on the first sliding rod 101 are respectively fixedly connected with the opposite sides of the two first movable blocks 103, the opposite ends of the two buffer springs 106 on the first sliding rod 101 are respectively fixedly connected with the opposite sides of the two first positioning blocks 8, the opposite ends of the two buffer springs 106 on the second sliding rod 102 are respectively fixedly connected with the opposite sides of the two second movable blocks 104, the opposite ends of the two buffer springs 106 on the second sliding rod 102 are respectively fixedly connected with the opposite sides of the two second positioning blocks 9, when the buffer device 10 is compressed and compressed by vibration, the X-shaped cross rod 105 can be driven to compress, so that the two ends of the bottom of the X-shaped cross rod 105 respectively push the two first movable blocks 103 to slide back on the first sliding rod 101, and simultaneously the two ends of the top of the X-shaped cross rod 105 respectively push the two second movable blocks 104 to slide back on the second sliding rod 102, thereby extruding the buffer springs 106, the buffer spring 106 is deformed, and the elastic force of the buffer spring 106 can effectively block the transmission of vibration, thereby reducing the vibration strength of the inductive ballast main body 1.

Further, the top of first locating piece 8 is seted up flutedly 12, and recess 12 and second locating piece 9 looks adaptation, when inductance type ballast main part 1 vibrations when mounting groove 7 orientation on the mounting panel 5, through setting up recess 12 on the first locating piece 8 and second locating piece 9 into the looks adaptation, can make first locating piece 8 and second locating piece 9 pass through recess 12 block to when avoiding inductance type ballast main part 1 atress, take place the vibrations of other directions.

Further, the first sliding blocks 13 are fixedly connected to the bottoms of the two first movable blocks 103, the first sliding grooves 14 are formed in the inner bottom wall of the mounting groove 7, the two first sliding blocks 13 are respectively connected with the inner sliding portions of the first sliding grooves 14 in a sliding mode, the first movable blocks 103 can be driven to slide on the first sliding rods 101 flexibly through the first sliding blocks 13, meanwhile, the first movable blocks 103 can be limited and guided, and the change of the direction of the first movable blocks 103 is avoided.

Further, the top of the two second movable blocks 104 is fixedly connected with a second sliding block 15, a second sliding groove 16 is formed in the bottom of the inductive ballast main body 1, the two second sliding blocks 15 are respectively connected with the second sliding groove 16 in a sliding manner, and the second movable blocks 104 can move on the second sliding rods 102 conveniently due to the arrangement of the second sliding blocks 15 and the second sliding grooves 16, so that the second movable blocks 104 are more flexible in movement.

Further, all the cover is equipped with extension spring 17 on first slide bar 101 and the second slide bar 102, both ends respectively with the opposite side fixed connection of two first movable blocks 103 about extension spring 17 on the first slide bar 101, both ends respectively with the opposite side fixed connection of two second movable blocks 104 about extension spring 17 on the second slide bar 102, can be when first movable block 103 and second movable block 104 atress motion through setting up extension spring 17, take place deformation, and then can offset partly power, effectual reduction motion dynamics, and then reduce vibrations.

Further, the cross sections of the first sliding rod 101 and the second sliding rod 102 are both rectangular, the first movable block 103 and the second movable block 104 are respectively matched with the first sliding rod 101 and the second sliding rod 102, and by setting the cross sections of the first sliding rod 101 and the second sliding rod 102 to be rectangular, the situation that the normal operation of the buffering operation of the whole buffering device 10 is affected due to changes in other directions when the first movable block 103 and the second movable block 104 are stressed can be avoided.

The working principle is as follows: when the inductive ballast body 1 works, the bottom plate 2 is vibrated to move towards the mounting plate 5, and then the damping mechanism 6 is compressed, so that the rubber damping columns 62 and the second damping springs 63 are deformed, and then the force of vibration is counteracted, and the damping effect is effectively achieved, meanwhile, the number of the second damping springs 63 is set to be at least four and is uniformly distributed, so that the effect of reducing the vibration intensity can be effectively enhanced, meanwhile, the bottom of the inductive ballast body 1 moves towards the bottom of the mounting groove 7, the buffering device 10 is compressed, so that the X-shaped cross rod 105 in the buffering device 10 is compressed, so that two ends of the bottom of the X-shaped cross rod 105 respectively push the two first movable blocks 103 to slide back along with the first sliding block 13 in the first sliding groove 14, and two ends of the top of the X-shaped cross rod 105 respectively push the two second movable blocks 104 to slide back along with the second sliding block 15 in the second sliding groove 16, and then stretching extension spring 17, and then can offset some power, effectual reduction dynamics of motion, and then reduce vibrations, meanwhile extrude buffer spring 106, buffer spring 106 elastic power, can effectually block the transmission of vibrations, reduce the vibration range of inductance type ballast main part 1, can further slow down the holistic intensity of vibrations of inductance type ballast through first damping spring 11 at last, solved current inductance type ballast because lack the mechanism that can reduce the intensity of vibrations, when the in-service use, the situation that often can take place the internals to damage or drop if atress vibrations, influence the holistic result of use of inductance type ballast.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. An inductive ballast capable of reducing vibration intensity, which comprises an inductive ballast main body (1), and is characterized in that: the left side and the right side of the inductive ballast main body (1) are fixedly connected with bottom plates (2), the tops of the two bottom plates (2) are fixedly connected with wire holders (3), the tops of the two wire holders (3) are fixedly connected with four inductive coils (4), the bottom of the inductive ballast main body (1) is provided with a mounting plate (5), and the bottoms of the two bottom plates (2) and the tops of the mounting plate (5) are respectively provided with a damping mechanism (6) which is uniformly distributed;

mounting groove (7) that the equidistance was arranged are seted up at the top of mounting panel (5), the equal fixedly connected with first locating piece (8) of the left and right sides of diapire in mounting groove (7), the bottom of inductance type ballast main part (1) corresponds every first locating piece (8) equal fixedly connected with second locating piece (9), two be provided with buffer (10) between first locating piece (8) and two second locating pieces (9), the first damping spring (11) that the top fixedly connected with equidistance of mounting panel (5) was arranged, the top of first damping spring (11) and the bottom fixed connection of inductance type ballast main part (1), adjacent two first damping spring (11) are located the left and right sides of buffer (10) respectively.

2. The inductive ballast of claim 1, wherein said inductive ballast is capable of reducing vibration intensity: damper (6) include two rubber slab (61), two one side that rubber slab (61) deviates from mutually respectively with the bottom of bottom plate (2) and the top fixed connection of mounting panel (5), two be provided with rubber shock absorber post (62) between rubber slab (61), the top and the bottom of rubber shock absorber post (62) respectively with the opposite side fixed connection of two rubber slab (61), two set up between rubber slab (61) and lie in rubber shock absorber post (62) outside fixedly connected with evenly distributed's second damping spring (63), the top and the bottom of second damping spring (63) respectively with the opposite side fixed connection of two rubber slab (61), the quantity of second damping spring (63) is four at least.

3. The inductive ballast of claim 1, wherein said inductive ballast is capable of reducing vibration intensity: the buffer device (10) comprises a first sliding rod (101), the left end and the right end of the first sliding rod (101) are fixedly connected with the opposite sides of two first positioning blocks (8) respectively, a second sliding rod (102) is arranged above the first sliding rod (101), the left end and the right end of the second sliding rod (102) are fixedly connected with the opposite sides of two second positioning blocks (9) respectively, two first movable blocks (103) which are symmetrically distributed are sleeved on the first sliding rod (101), two second movable blocks (104) which are symmetrically distributed are sleeved on the second sliding rod (102), the two second movable blocks (104) are respectively positioned right above the two first movable blocks (103), an X cross rod (105) is arranged between the two first movable blocks (103) and the two second movable blocks (104), and the two ends of the bottom of the X cross rod (105) are hinged with the tops of the two first movable blocks (103) respectively, the two ends of the top of the X-shaped cross rod (105) are respectively hinged with the bottoms of the two second movable blocks (104), two buffer springs (106) are sleeved on the first sliding rod (101) and the second sliding rod (102), one ends of the first sliding rod (101) opposite to the two buffer springs (106) are respectively and fixedly connected with the opposite sides of the two first movable blocks (103), one end of the first sliding rod (101) which is deviated from the two buffer springs (106) is respectively and fixedly connected with the opposite sides of the two first positioning blocks (8), one ends of the two buffer springs (106) on the second sliding rod (102) opposite to each other are respectively and fixedly connected with the opposite sides of the two second movable blocks (104), one ends of the two buffer springs (106) on the second sliding rod (102) which are deviated from each other are respectively and fixedly connected with the opposite sides of the two second positioning blocks (9).

4. The inductive ballast of claim 1, wherein said inductive ballast is capable of reducing vibration intensity: a groove (12) is formed in the top of the first positioning block (8), and the groove (12) is matched with the second positioning block (9).

5. An inductive ballast according to claim 3 wherein the vibration level is reduced by: two the equal first slider (13) of fixedly connected with in bottom of first movable block (103), first spout (14) have been seted up to the inner diapire of mounting groove (7), two first slider (13) respectively with the inside sliding connection of first spout (14).

6. An inductive ballast according to claim 3 wherein the vibration level is reduced by: the top of the second movable block (104) is fixedly connected with a second sliding block (15), a second sliding groove (16) is formed in the bottom of the inductive ballast main body (1), and the second sliding blocks (15) are respectively connected with the second sliding groove (16) in a sliding mode.

7. An inductive ballast according to claim 3 wherein the vibration level is reduced by: the stretching spring (17) is sleeved on each of the first sliding rod (101) and the second sliding rod (102), the left end and the right end of the stretching spring (17) on the first sliding rod (101) are fixedly connected with the opposite sides of the two first movable blocks (103), and the left end and the right end of the stretching spring (17) on the second sliding rod (102) are fixedly connected with the opposite sides of the two second movable blocks (104).

8. An inductive ballast according to claim 3 wherein the vibration level is reduced by: the cross sections of the first sliding rod (101) and the second sliding rod (102) are both rectangular, and the first movable block (103) and the second movable block (104) are respectively matched with the first sliding rod (101) and the second sliding rod (102).