CN206190191U - Chance hinders protector - Google Patents

Abstract

The utility model discloses a chance hinders protector, chance hinders protector include pressure -sensitive device, shell, setting micromatic setting and the trigger device in the shell, the micromatic setting is including fine setting screw rod and contact plate, trigger device includes the slider and fixes micro -gap switch on the slider, the bottom of slider is connected with pressure -sensitive device. This chance hinders protector utilizes the micromatic setting to adjust the height of contact plate, adaptable different model shutter doors, and can rise to the top according to all door leaf of shutter door the time, go up drive chain's sag, through the height of micromatic setting adjustment contact plate, make not micro -switches of pressure -sensitive device, to the lighter shutter door of door leaf weight, can be based on under door leaf when accessible, the drive chain's of shutter door decline in -process sag, the height of adjustment contact plate, the shutter door at the in -process that normally descends, make not micro -switches of pressure -sensitive device, improve chance hinders protector and meet that it prevents turning over to hinder rolls up a rate of accuracy of shutting down.

Description

Be hampered protector

Technical field

The utility model is related to the technical field of shutter door, and be more particularly to hampered protector.

Background technology

Shutter door is cascaded with the door piece of multi-joint activity, is turned centered on the spool being arranged on above a piece It is dynamic, so as to realize the door of switch.At present, electric rolling door gradually replaces manual shutter door, and is widely used in factory, business The places such as shop, warehouse and garage.

Electric rolling door controls the rotating of rotating shaft using the rotating of motor by driving chain, so as to realize shutter door Switch.But when people or object is touched during shutter door declines and closes, motor does not stop operating, and drive shaft Continuous running, causes shutter door to be extruded with people or object, then directly people or object can be caused damage, while upper driving-chain The pulling force that bar is produced due to door piece gravity to it disappears, and driving chain soft sagging situation is occurred, and lower driving chain In straight condition, a piece can so inverted, a piece is deformed, the door piece and motor to shutter door cause damage, because This, existing electric rolling door is commonly installed the protector that is hampered, if soft sagging phenomenon occurs in upper driving chain, be hampered protection Device will be triggered, and power off motor, and door piece stops declining, so as to play a part of to protect shutter door.

Due to the mount point difference of the protector that is hampered that the electric rolling door of different model is set, the existing protector that is hampered The electric rolling door of different model is not applied for, it is poor for applicability；The upper and lower chain of shutter door is have extensively studied for this applicant Various operating modes, including：（1）Preferable operating mode, referring to accompanying drawing 7, upper chain 25 is in tensioning state with lower chain 24；（2）Just Beginning operating mode, referring to accompanying drawing 8, when all pieces all rise to the top of electric rolling door, upper driving chain 25 is due to door piece weight Pulling force that power is produced to it disappears, and upper driving chain 25 can produce the phenomenon for naturally drooping, or some electric rolling doors due to The lighter in weight of door piece, in door piece underdrive, even if door piece lower section is without barrier, due to the door that upper driving chain 25 is subject to The pulling force that piece gravity is produced to it is smaller, and lower driving chain 24 is tensioned while motor 23 is rotated, and now goes up driving chain 25 Soft sagging phenomenon can be produced, the at this moment existing protector that is hampered will be triggered, and power off motor 23, door piece stops declining, The situation of the protector that is hampered wrong report, influences the use of electric rolling door；Upper driving chain 25 is caused to relax except pulling force is small In addition, due to the tension force of lower driving chain 25 when door piece is descending, driving chain is caused to be shaken about 24, be hampered protection during shake The situation that device can also be reported by mistake, influences the use of electric rolling door；（3）Nominal situation, referring to accompanying drawing 9, the meeting of lower chain 24 exists Naturally drooped under Action of Gravity Field, and upper chain 25 can be tensioned under the Action of Gravity Field of door piece；（4）Be hampered operating mode, referring to accompanying drawing 10, There is barrier door piece lower section, and motor 23 is rotated is tensioned lower driving chain 24, because the pulling force that door piece gravity is produced to it disappears, Upper driving chain 25 can produce serious sagging phenomenon.

A kind of electric shutter door was researched and developed before applicant, the patent No. 201420693121.4 is in the prior art, electric Machine lower driving chain tensioning post-tensioning dynamic pressure induction contact is up, connecting rod pressing compressing tablet, so that touching switch, motor power-off stops Machine, and researched and developed one kind and be hampered protector and shutter door, the patent No. 201520727292.9, after driving chain is lax on motor Pressure sensitive contact is descending, and connecting rod stops pressing compressing tablet, so that trip switch, motor power-off is shut down, therefore existing design is first The easily maloperation because of chain shake during beginning operating mode；And spring pressure P of the prior art, spring tension N, motor chain Tri- relative stress points of power F moment association microswitch, referring to accompanying drawing 1, no matter there is change corrosion or dust in which ring Accumulation can all cause nature to disconnect, therefore there is following trouble point：（1）Door body is shut down naturally when without hindrance,（2）Essence during debugging Exactness is not high or debugging is difficult,（3）Occur shutting down without reason or intermittent shutdown.So prior art is deposited when putting into actually used In the deficiency such as unstable properties and fault of construction, including（1）Because door body have size, width, height, weight point, cause Motor chain relative tension it is changeable, it is therefore necessary to the cancellation protector that is hampered connects open in usual setting with motor lower driving chain Meter, be changed to be hampered protector and the normally closed design of driving chain on motor,（2）Microswitch design it is unreasonable, stress point with open Close interference so that switch disconnects in its natural state, the protector that causes to be hampered fails, it is therefore necessary to the moment need motor chain to The tension force for giving the protector that is hampered certain,（3）Service life is short, because of corrosion and dust, as long as cause three relative stress points its In a failure be entirely hampered protector failure, average life only one of which month.（4）Structure is cumbersome, triple elastic force pair Rush, once machinery itself slightly gets rusty, then cause connecting rod frictional resistance to increase, descending rear reset is not smooth, causes to switch off, and leads Cause be hampered protector failure；Or connecting rod get rusty after cannot be descending, so as to switch cannot be disconnected, exist once be hampered and cannot shut down Major safety risks.

Utility model content

The utility model purpose is to provide one kind to be hampered protector and shutter door, is adapted to solving the existing protector that is hampered Property it is poor, and the anti-warp of being hampered shuts down the low problem of accuracy rate.

According to embodiment first aspect of the present utility model, there is provided one kind is hampered protector, including pressure sensitive device, Shell, the micromatic setting being arranged in shell and triggering device；

The micromatic setting includes fine setting screw rod and the contact plate being connected with fine setting screw flight；

The fine setting screw rod is through the top and bottom of the shell；

The triggering device includes sliding block and the microswitch being fixed on the sliding block；

The bottom of the sliding block is connected with the pressure sensitive device, and the sliding block can connect in housing top end with described Slided up and down between touch panel；

The free end of the triggering shell fragment of the microswitch is located at the top of the contact plate.

Further, the slider bottom is provided with spring limiting board, and the spring limiting board is perpendicular with the sliding block, described The free end for triggering shell fragment is located between the spring limiting board and the contact plate；The triggering device also includes pressure bullet Spring, the compression spring is located between the housing top end and the spring limiting board, and the housing top end is limited to the spring The vertical range of position plate is not more than the natural length of the compression spring.

Further, the fine setting screw rod passes through the spring limiting board.

Further, the triggering device also includes spring slide bar, and the spring slide bar runs through the contact plate, the spring Limiting plate and the compression spring.

Further, the pressure sensitive device includes transmission slide bar and the pressure sensitive contact positioned at the housing exterior, One end of the transmission slide bar is connected with the slider bottom, the other end and the pressure sensitive contact of the transmission slide bar It is connected.

Further, the both sides of the sliding block are provided with guide plate, and the guide plate is perpendicular with the sliding block, the guide plate Lateral wall be in contact with the madial wall of the shell.

Further, the top of the fine setting screw rod is provided with fine setting nut.

Further, the both sides of the shell are provided with installing plate, and the installing plate is perpendicular with the side wall of the shell.

Further, the installing plate is provided with mounting groove.

From above technical scheme, the utility model provides one kind and is hampered protector and shutter door, and advantage is：The chance The position after protector is in contact according to pressure sensitive device with the upper driving chain of shutter door is hindered, is connect using micromatic setting regulation The height of touch panel, to adapt to the mount point of the protector that is hampered of different model shutter door；During nature, switch avoids all receiving The interference and maloperation in force, until motor chain force is loosened and reaches the value of setting and can just disconnect, overcome of the prior art Problem.And when can rise to top according to all pieces of shutter door, the sag of upper driving chain is adjusted by micromatic setting The height of whole contact plate, makes pressure sensitive device not trigger microswitch；The shutter door lighter for door sheet weight, can according to When accessible under door piece, the sag of the driving chain during shutter door decline adjusts the height of contact plate, exists in shutter door During normal decline, pressure sensitive device is not triggered microswitch, improve the adaptability of the protector that is hampered, raising is hampered Protector is hampered the accuracy rate that anti-warp is shut down.Therefore the simple reverse-engineering of the utility model not prior art, but examine The relation of switch and stress point is considered, has optimized design, simplified stress point, so that stress point is not sent out with the control of switch Raw interference and maloperation.To be hampered protector and the normally closed design of driving chain on motor, be overcome door body and be caused motor train in itself Bar relative tension it is changeable.

Brief description of the drawings

In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this A little accompanying drawings obtain other accompanying drawings.

Fig. 1 is prior art protection device schematic diagram.

A kind of structure chart of protector that is hampered that Fig. 2 is provided for the utility model.

Fig. 3 is the location diagram for finely tuning screw rod and spring slide bar.

Fig. 4 is the structure chart of the contact plate of Fig. 1.

Fig. 5 is the structure chart of the sliding block of Fig. 1.

A kind of structure chart of shutter door that Fig. 6 is provided for the utility model.

Fig. 7 is preferable operating mode schematic diagram.

Fig. 8 is initial operating mode schematic diagram.

Fig. 9 is nominal situation schematic diagram.

Figure 10 is the operating mode schematic diagram that is hampered.

Wherein, 1- shells, 2- compression springs, 3- fine setting nuts, 4- sliding blocks, 5- microswitches, 6- mounting grooves, 7- triggering bullets Piece, 8- transmission slide bars, 9- pressure sensitive contacts, 10- contact plates, 11- spring slide bars, 12- fine setting screw rods, 13- screw threads, 14- the One through hole, the through holes of 15- second, 16- third through-holes, 17- guide plates, 18- spring limiting boards, 19- fourth holes, 20- connecting plates, 21- fifth holes, 22- rotating shafts, 23- motors, the upper driving chains of 24-, 25- lower driving chains, 26- is hampered protector.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is entered to pass Dynamic clear, complete description, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, belongs to the scope of the utility model protection.

As shown in Figure 2 and Figure 6, according to embodiment first aspect of the present utility model, there is provided one kind is hampered protector 26, Including pressure sensitive device, shell 1, the micromatic setting being arranged in shell 1 and triggering device；

The micromatic setting includes fine setting screw rod 12 and the contact plate 10 being threadedly coupled with fine setting screw rod 12；

The fine setting screw rod 12 is through the top and bottom of the shell 1；

The triggering device includes sliding block 4 and the microswitch 5 being fixed on the sliding block 4, and the microswitch 5 is normally closed Set；

The bottom of the sliding block 4 is connected with the pressure sensitive device, and the sliding block 4 can be in the top of shell 1 and institute State and slide up and down between contact plate 10；

The free end of the triggering shell fragment 7 of the microswitch 5 is located at the top of the contact plate 10.

Alternatively, contact plate 10 is provided with first through hole 14, and the inner side of first through hole 14 is provided with mutually fits with fine setting screw rod 12 The screw thread 13 matched somebody with somebody, so as to realize finely tuning the threaded connection of screw rod 12 and contact plate 10.

As shown in fig. 6, the operation principle of the present embodiment is：Be hampered the pressure sensitive device and upper driving chain of protector 26 24 keep contact, and the free end of the triggering shell fragment 7 of microswitch 5 is in contact with contact plate 10, and microswitch 5 is in and connects Logical state, when electric rolling door is during decline, during the lower section clear of electric rolling door, motor 23 can be powered work Make；But when having barrier below electric rolling door, after door piece touches barrier, upper driving chain 24 is due to door piece gravity pair The pulling force that it is produced is disappeared, and makes driving chain 24 sagging, and pressure sensitive device is also moved downward due to self gravitation, and then band Microswitch 5 on movable slider 4 is moved downward, while making triggering shell fragment 7 be subject to the obstruction of connecting plate 20 and deform upon, and is touched The button of microswitch 5 is sent out, microswitch 5 is off, so that motor 23 is powered off, electric rolling door stops work Make.

Due to the mount point difference of the protector 26 that is hampered that the electric rolling door of different model is set, can be hampered this is installed After protector 26, as the case may be, the height of contact plate 10 is adjusted by rotary fine adjustment screw rod 12.

If the mount point of the protector 26 that is hampered is closer to the distance with upper driving chain 24, pressure sensitive device and upper driving-chain After bar 24 is contacted, sliding block 4 is in the top of shell 1, and then make the triggering shell fragment 7 of microswitch 5 and the position of contact plate 10 Farther out, even if pressure sensor declines due to the sagging of upper driving chain 24, triggering shell fragment 7 can not be made to produce triggering fine motion The deformation of the button of switch 5, according to the situation, user can go up rotation screw rod, the position of contact plate 10 is increased, until meeting Pressure sensor declines due to the sagging of upper driving chain 24, and contact plate 10 can make triggering shell fragment 7 produce triggering microswitch 5 Button deformation condition untill.

If the mount point of the protector 26 that is hampered is distant with upper driving chain 24, pressure sensitive device and upper driving-chain After bar 24 is contacted, sliding block 4 is in the bottom of shell 1, and then make the triggering shell fragment 7 of microswitch 5 and the position of contact plate 10 It is relatively near, triggering shell fragment 7 is produced the deformation of the button of triggering microswitch 5, it is impossible to make the energization work of motor 23, according to the feelings Condition, user can backspin screw rod, decline the position of contact plate 10, until meet electric rolling door lower section clear When, the deformation for triggering shell fragment 7 can not trigger microswitch 5, and motor 23 can be powered work, and in pressure sensor due to uploading Move the sagging of chain 24 and decline, contact plate 10 can make triggering shell fragment 7 produce the condition of the deformation of the button of triggering microswitch 5 Untill.

For when the door piece of electric rolling door all rises to top, upper driving chain 24 is produced due to door piece gravity to it Pulling force disappear, upper driving chain 24 can produce soft sagging phenomenon, but upper driving chain 24 sag and electric rolling gate Sag when door meets with obstruction is slightly different, and user can be according to the sag of upper driving chain 24, by finely tuning screw rod 12 The position of contact plate 10 is adjusted, so that in this case, although pressure sensitive device can be with the sagging of upper driving chain 24 Decline, but the deformation of triggering shell fragment 7 can not trigger microswitch 5, and the raising protector 26 that is hampered is hampered the standard that anti-warp shuts down True rate.

For the lighter shutter door of door sheet weight, can according to it is accessible under door piece when, shutter door decline during biography The sag of dynamic chain, the height of contact plate 10 is adjusted by adjusting screw rod, in shutter door during normal decline, makes pressure Induction installation does not trigger microswitch 5, and the raising protector 26 that is hampered is hampered the accuracy rate that anti-warp shuts down.

From above technical scheme, the present embodiment provides one kind and is hampered protector 26, and the protector 26 that is hampered is according to pressure Power induction installation be in contact with the upper driving chain 24 of shutter door after position, using micromatic setting adjust contact plate 10 height Degree, to adapt to the mount point of the protector 26 that is hampered of different model shutter door；And can be risen according to all pieces of shutter door During to top, the sag of upper driving chain 24 adjusts the height of contact plate 10 by micromatic setting, makes pressure sensitive device not Triggering microswitch 5；The shutter door lighter for door sheet weight, can according to it is accessible under door piece when, shutter door decline process In driving chain sag, adjust the height of contact plate 10, in shutter door during normal decline, fill pressure sensitive Put and do not trigger microswitch 5, the raising protector 26 that is hampered is hampered the accuracy rate that anti-warp shuts down.

Preferably, the bottom of the sliding block 4 is provided with spring limiting board 18, and the spring limiting board 18 mutually hangs down with the sliding block 4 Directly, the free end of the triggering shell fragment 7 is located between the spring limiting board 18 and the contact plate 10；The triggering device is also Including compression spring 2, the compression spring 2 is located between the top of the shell 1 and the spring limiting board 18, the shell 1 Top is not more than the natural length of the compression spring 2 to the vertical range of the spring limiting board 18.

Compression spring 2, and the low side of shell 1 are set to spring retainer by between the top of shell 1 and spring limiting board 18 The vertical range of plate 18 is not more than the natural length of compression spring 2, compression spring 2 is in compressive state, in pressure activated dress When putting decline, bounce is produced to sliding block 4, sliding block 4 is declined rapidly, and then triggering shell fragment 7 is produced deformation as early as possible, make fine motion Switch 5 disconnects, so that motor 23 is powered off.

As shown in Figure 2 and Figure 4, it is preferable that the fine setting screw rod 12 passes through the spring limiting board 18.

As shown in Figure 2, Figure 3 and Figure 4, alternatively, spring limiting board 18 is provided with the second through hole 15, and the second through hole 15 With diameter greater than the diameter of fine setting screw rod 12, fine setting screw rod 12 is so set not hinder the up and down motion of sliding block 4.

Preferably, the triggering device also includes spring slide bar 11, and the spring slide bar 11 runs through the contact plate 10, institute State spring limiting board 18 and the compression spring 2.

Alternatively, contact plate 10 is provided with third through-hole 16, and spring limiting board 18 is provided with fourth hole 19, to realize spring Slide bar 11 runs through contact plate 10 and spring limiting board 18.

Spring slide bar 11 can limit the position of compression spring 2, prevent compression spring 2 from being produced in compression or stretching, extension and rock, The position of compression spring 2 is set to change.

Preferably, the pressure sensitive device includes transmission slide bar 8 and the pressure sensitive contact outside the shell 1 9, one end of the transmission slide bar 8 is connected with the bottom of the sliding block 4, the other end and the feeling of stress of the transmission slide bar 8 Contact 9 is answered to be connected.

Alternatively, the bottom of sliding block 4 is additionally provided with connecting plate 20, and connecting plate 20 is provided with fifth hole 21, transmission slide bar 8 One end is fixedly connected by screw and fifth hole 21 with connecting plate 20.The other end and pressure sensitive contact 9 for being driven slide bar 8 lead to Cross screw etc. to be detachably connected, after pressure contact abrasion, be convenient for changing.

Preferably, the both sides of the sliding block 4 are provided with guide plate 17, and the guide plate 17 is perpendicular with the sliding block 4, described The lateral wall of guide plate 17 is in contact with the madial wall of the shell 1.

During moving up and down, sliding block 4 produces and rocks and position skew occurs the anti-limited slip block 4 of guide plate 17, makes sliding block 4 Motion is hindered.

Preferably, the top of the fine setting screw rod 12 is provided with fine setting nut 3.

User can be easy to use by rotary fine adjustment nut 3 come rotary fine adjustment screw rod 12.

Preferably, the both sides of the shell 1 are provided with installing plate, and the installing plate is perpendicular with the side wall of the shell 1.

Alternatively, the installing plate is provided with mounting groove 6.

The protector 26 that is hampered can be installed in the mount point of electric rolling door by mounting groove 6.

As shown in figure 5, according to embodiment second aspect of the present utility model, the utility model provides a kind of shutter door, Including motor 23 and rotating shaft 22, the motor 23 is connected by driving chain with the rotating shaft 22, the driving chain according to Operating mode is divided into driving chain 24 and lower driving chain 25, it is characterised in that the shutter door is also included as in claim 1-8 The protector that is hampered described in any one, the protector that is hampered is arranged at the top of driving chain 24, and pressure sensitive contact 9 It is in contact with upper driving chain 24.

The utility model includes following job step：

Step 1, adjusts micromatic setting so that the disengaging of contact plate 10 is contacted with the triggering shell fragment 7 of microswitch 5, described to touch The free end for sending out shell fragment 7 is located at the top of the contact plate 10；

Step 2, initial operating mode, motor 23 starts, and lower driving chain 25 is tensioned, and upper driving chain 24 is lax and shakes, Sliding block 4 is descending or shake is so as to drive triggering shell fragment 7 descending or shake, and the triggering free end of shell fragment 7 is slightly touched with contact plate 10, Because microswitch 5 is normally closed, the upward shake of triggering shell fragment 7 free end will not touch microswitch 5；

Step 3, nominal situation, upper driving chain 24 is tensioned, and lower driving chain 25 relaxes, the freedom of the triggering shell fragment 7 End is positioned at the top of the contact plate 10；

Step 4, be hampered operating mode, and upper driving chain 24 deforms sagging, and lower driving chain 25 is tensioned, sliding block 4 drastically it is descending from And driving triggering shell fragment 7 drastically descending, the triggering free end of shell fragment 7 is touched with contact plate 10, and in the drag effect of contact plate 10 Lower deformation is the level of state, and triggers being contacted with microswitch 5 for the free end of shell fragment 7, and the power-off of motor 23 is shut down.

Because the shutter door includes the above-mentioned protector 26 that is hampered, so all advantages with the above-mentioned protector 26 that is hampered, Repeat no more.

From above technical scheme, the utility model provides one kind and is hampered protector 26 and shutter door, the protection that is hampered Device 26 be in contact with the upper driving chain 24 of shutter door according to pressure sensitive device after position, using micromatic setting adjust contact The height of plate 10, to adapt to the mount point of the protector 26 that is hampered of different model shutter door；And can be according to all of shutter door When door piece rises to top, the sag of upper driving chain 24 adjusts the height of contact plate 10 by micromatic setting, makes feeling of stress Device is answered not trigger microswitch 5；The shutter door lighter for door sheet weight, can according to it is accessible under door piece when, shutter door The sag of the driving chain during decline, adjusts the height of contact plate 10, in shutter door during normal decline, makes pressure Power induction installation does not trigger microswitch 5, and the raising protector 26 that is hampered is hampered the accuracy rate that anti-warp shuts down.

Those skilled in the art will readily occur to this practicality after considering specification and putting into practice utility model disclosed herein Other new embodiments.The application is intended to any modification of the present utility model, purposes or adaptations, these Modification, purposes or adaptations follow general principle of the present utility model and including undocumented skill of the utility model Common knowledge or conventional techniques in art field.Description and embodiments be considered only as it is exemplary, it is of the present utility model True scope and spirit are pointed out by following claim.

It should be appreciated that the utility model is not limited to the accurate knot for being described above and being shown in the drawings Structure, and various modifications and changes can be driven entering without departing from the scope.Scope of the present utility model is only by appended right It is required that to limit.

Claims (8)

1. be hampered protector, including pressure sensitive device, shell（1）, be arranged on shell（1）Interior micromatic setting and triggering dress Put；Characterized in that,

Micromatic setting includes fine setting screw rod（12）And with fine setting screw rod（12）The contact plate of threaded connection（10）；

The fine setting screw rod（12）Through the shell（1）Top and bottom；

The triggering device includes sliding block（4）Be fixed on the sliding block（4）On microswitch（5）, the microswitch（5） Normally closed setting；

The sliding block（4）Bottom be connected with the pressure sensitive device, and the sliding block（4）Existed by pressure sensitive device Shell（1）Top and contact plate（10）Between slide up and down；

The microswitch（5）Triggering shell fragment（7）Free end be located at the contact plate（10）Top and movably with State contact plate（10）Contact；

Sliding block（4）Bottom is provided with connecting plate（20）And spring limiting board（18）, the spring limiting board（18）With the sliding block（4） It is perpendicular, the triggering shell fragment（7）Free end be located at the spring limiting board（18）With the contact plate（10）Between；It is described Triggering device also includes compression spring（2）, the compression spring（2）Positioned at the shell（1）Top and the spring limiting board （18）Between, the shell（1）Top is to the spring limiting board（18）Vertical range be not more than the compression spring（2）'s Natural length.

2. the protector that is hampered according to claim 1, it is characterised in that the fine setting screw rod（12）Through spring limit Position plate（18）.

3. the protector that is hampered according to claim 1, it is characterised in that the triggering device also includes spring slide bar （11）, the spring slide bar（11）Through the contact plate（10）, the spring limiting board（18）And the compression spring（2）.

4. the protector that is hampered according to claim 1, it is characterised in that the pressure sensitive device includes transmission slide bar （8）With positioned at the shell（1）Outside pressure sensitive contact（9）, the transmission slide bar（8）One end and the sliding block（4） Bottom is connected, the transmission slide bar（8）The other end and the pressure sensitive contact（9）It is connected.

5. the protector that is hampered according to claim 1, it is characterised in that the sliding block（4）Both sides be provided with guide plate （17）, the guide plate（17）With the sliding block（4）It is perpendicular, the guide plate（17）Lateral wall and the shell（1）'s Madial wall is in contact.

6. the protector that is hampered according to claim 1, it is characterised in that the fine setting screw rod（12）Top be provided with fine setting Nut（3）.

7. the protector that is hampered according to claim 1, it is characterised in that the shell（1）Both sides be provided with installing plate, institute Installing plate is stated with the shell（1）Side wall it is perpendicular.

8. the protector that is hampered according to claim 7, it is characterised in that the installing plate is provided with mounting groove（6）.