CN208633630U - Stop limiting device - Google Patents

Stop limiting device Download PDF

Info

Publication number
CN208633630U
CN208633630U CN201820512612.2U CN201820512612U CN208633630U CN 208633630 U CN208633630 U CN 208633630U CN 201820512612 U CN201820512612 U CN 201820512612U CN 208633630 U CN208633630 U CN 208633630U
Authority
CN
China
Prior art keywords
bar
parking
vehicle
limiting device
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201820512612.2U
Other languages
Chinese (zh)
Inventor
段玉振
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei College of Industry and Technology
Original Assignee
Hebei College of Industry and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei College of Industry and Technology filed Critical Hebei College of Industry and Technology
Priority to CN201820512612.2U priority Critical patent/CN208633630U/en
Application granted granted Critical
Publication of CN208633630U publication Critical patent/CN208633630U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

The utility model provides parking limiting device, belong to parking equipment technical field, including the second bar for being arranged in parallel in the first bar of the two sides of parking stall and being vertically set between two first bars, it further include adjusting component two first bars of connection for passing through the position for adjusting second bar apart from detection components, second bar being arranged on first bar.Parking limiting device provided by the utility model prevents vehicle tyre from colliding the first bar by the way that rectifying a deviation apart from detection components to the vehicle for entering parking stall on the first bar is arranged in;The position that component adjusts the second bar according to different wheelbases and the vehicle of vehicle commander is adjusted, makes the vehicle parking of different model behind parking stall, headstock keeps horizontal, prevents from occupying Park Lane.

Description

Stop limiting device
Technical field
The utility model belongs to parking equipment technical field, is to be related to the limiting device that stops more specifically.
Background technique
With the development of national economy, the development of automobile is especially rapid, and car owning amount is continuously increased, the quantity in parking lot It is continuously increased, the quantity of parking position is also constantly rising therewith, and vehicle body is being not just in parking position for vehicle parking in order to prevent And adjacent parking stall space is occupied, vehicle parking is influenced after causing adjacent parking stall space occupied, often in the long side of parking position Position is equipped with the anti-bias bar for preventing vehicle parking lateral shift, and such as vehicle shift accidentally occurs for driver when parking cars, Vehicle can directly knock anti-bias bar, when serious, will cause the deformation of bar or the damage of tire, particularly with new hand driver this The probability that kind happens is higher, may cause other more because of emergency case maloperation when new hand driver knocks bar For serious consequence;Outside it, it is often additionally provided with the parking bar for limiting vehicle rear wheel in the rear side of parking position, prevents vehicle from stopping Vertical misalignment when vehicle influences the channel of vehicles while passing parking position, but different vehicles is due to its length of wagon difference, wheelbase Difference will cause the case where headstock position of vehicle is come and gone, no when the vehicle of different model is parked according to parking bar Beauty is only influenced, and Park Lane can also be occupied for wheelbase and the longer vehicle of vehicle body, influences the disengaging of other vehicles.
Utility model content
The purpose of this utility model is to provide parking limiting devices, it is intended to solve vehicle when parking stall is parked, laterally partially It moves past big and hits anti-bias bar, headstock is come and gone the problem of occupying Park Lane.
In order to achieve the above purposes, the technical solution adopted by the utility model is: provides parking limiting device, including sets in parallel The first bar in the two sides of parking stall and the second bar for being vertically set between two first bars are set, feature exists In: it further include that be additionally provided in detection components, first bar for along described on first bar is set The length direction of one bar adjusts the adjusting component of second bar position.
Further, described to include the bracket being fixed on first bar, be fixedly installed apart from detection components On the bracket first close to switch and fixed setting on the bracket and with described first close to switch electrically First alarm device of connection.
Further, the first shield is fixedly installed on first bar, first shield is located at described Bracket, first are close on switch and the first alarm device.
Further, first through hole is provided at the position that first shield and the first close switch match.
Further, the component that adjusts includes the cylinder of the horizontal inside for being fixed at first bar, setting The upper surface of first bar sliding slot and be vertically and fixedly arranged at second bar lower part and with the sliding slot The connecting rod that matches of position, the connecting rod is through the sliding slot and is fixedly connected with the ejector rod part of the cylinder.
Further, the cylinder is electrically connected the flexible inductor of the ejector rod part for controlling the cylinder.
Further, second is additionally provided on second bar electrically to connect close to switch and with described second close to switch The second alarm device connect.
Further, the second shield is fixedly installed on second bar, second shield is located at described Second close on switch and the second alarm device.
Further, the second through-hole is provided at the position that second shield and the second close switch match.
Further, it is additionally provided with above first bar for covering the cover board for adjusting component.
The beneficial effect of parking limiting device provided by the utility model is: compared with prior art, the utility model Stop limiting device, by the way that rectifying a deviation apart from detection components to the vehicle for entering parking stall on the first bar is arranged in, prevents Vehicle tyre collides the first bar;The position that component adjusts the second bar according to different wheelbases and the vehicle of vehicle commander is adjusted, is made not For vehicle parking with model behind parking stall, headstock keeps horizontal, prevents from occupying Park Lane.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the main view of parking limiting device provided by the embodiment of the utility model;
Fig. 2 is the side view of parking limiting device provided by the embodiment of the utility model;
Fig. 3 is the A direction view in Fig. 1;
Fig. 4 is the B direction view in Fig. 2.
In figure: 1, the first bar;11, sliding slot;2, the second bar;21, connecting rod;22, the second close switch;23, second is alert Report device;24, the second shield;25, the second through-hole;3, apart from detection components;31, bracket;32, the first close switch;33, One alarm device;34, the first shield;35, first through hole;4, component is adjusted;41, cylinder;42, inductor;5, cover board.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is that orientation based on the figure or position are closed System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.
Also referring to Fig. 1 and Fig. 2, now parking limiting device provided by the utility model is illustrated.Parking limit Device, including the second gear for being arranged in parallel in the first bar 1 of the two sides of parking stall and being vertically set between two the first bars 1 Bar 2, it is characterised in that: further include be arranged on the first bar 1 apart from detection components 3, the second bar 2 passes through for adjusting the The adjusting component 4 of two bars, 2 position connects the first bar 1.
Parking limiting device provided by the utility model, compared with prior art, the utility model parking limiting device leads to It crosses the vehicle for entering parking stalls apart from 3 pairs of detection components being arranged on the first bar 1 rectifying a deviation, prevents vehicle tyre collision the One bar 1;The position that component 4 adjusts the second bar 2 according to different wheelbases and the vehicle of vehicle commander is adjusted, the vehicle of different model is made After docking at parking stall, headstock keeps horizontal, prevents from occupying Park Lane.
Further, Fig. 1 and Fig. 3 are please referred to, a kind of specific reality as parking limiting device provided by the utility model Apply mode, apart from detection components 3 include the bracket 31 being fixed on the first bar 1, be fixed on bracket 31 the One close switch 32 and the first alarm device 33 that is being fixed on bracket 31 and being electrically connected with first close to switch 32, Bracket 31 is vertically set on two opposite medial surfaces of the first bar 1, and bracket 31 is a plate structure, and the length of bracket 31 is answered Moderate, bracket 31 is too long, can reduce the parking space of parking stall, and bracket 31 is too short, after correction component 3 responds, leaves driver's adjustment for Space it is too small, first is successively vertically installed with to the other end close to switch 32 from one end of the first bar 1 of connection on bracket 31 With the first alarm device 33, the positional relationship of the first close switch 32 and the first alarm device 33 is not required to specifically limit, and position can basis Actual conditions are adjusted, but must ensure the one end for the medial surface that first is arranged far from the first bar 1 close to switch 32 as far as possible, Ensure the first position that can incude wheel in time close to switch 32, when vehicle drives into parking stall, as the driving trace of vehicle occurs Offset, when close to the first bar 1, first senses the position of wheel close to switch 32, to the first controller transmission signal, first Controller controls the sending of the first alarm device 33 and pipes, and the first controller can be set on the first close switch 32 or setting exists On first alarm 33, driver is reminded to adjust vehicle driving trace in time, prevents wheel from hitting the first bar 1, when vehicle sails out of When parking stall, mode when working principle is driven into vehicle is consistent, will not repeat them here, can be according to reality apart from detection components 3 Border situation is arranged to multiple groups, is distributed on the medial surface of the first bar 1, can be improved anti-bias precision.
Further, Fig. 1 and Fig. 3 are please referred to, a kind of specific reality as parking limiting device provided by the utility model Mode is applied, is fixedly installed the first shield 34 on the first bar 1, the first shield 34 is located at bracket 31, first close to opening On pass 32 and the first alarm device 33, the first shield 34 is fixed on the medial surface of the first bar 1, and the first shield 34 is Rectangle frame, circular frame need to only meet and close bracket 31, first inside it i.e. close to switch 22 and the first alarm device 33 Can, when vehicle shifts, if driver fails to adjust track of vehicle according to the prompting of the first alarm device 33 in time, vehicle occurs When hitting the first bar 1, the first shield 34 can prevent vehicle from directly hitting the first close switch 22 and the first alarm device 33, Prevent the first close switch 22 and the first alarm device 33 because Vehicular impact is damaged, while the first shield 34 closing first connects Nearly switch 22 and the first alarm device 33 can prevent dust damage, sleet corrosion first close switch 22 and the first alarm device 33.
Further, referring to Fig. 1, as it is provided by the utility model parking limiting device a kind of specific embodiment party First through hole 35, the setting of first through hole 35 are provided at formula, the first shield 34 and the first position for matching close to switch 32 The first shield 34 upper surface and match with first close to the contact position of switch 32, guarantee that first approaches 32 energy of switch Enough perceive the track of vehicle in time by first through hole 35, meanwhile, embedded with transparent protection cap for sealing in first through hole 35 The first through hole 35 of the first shield 34 is closed, first can perceive vehicle location by transparent protection cap close to switch 32, protect Protecting cover can prevent the first shield 34 of entrance of dust and sleet and damage the first close switch 32 and the first alarm inside it Device 33.
Further, referring to Fig. 2, as it is provided by the utility model parking limiting device a kind of specific embodiment party Formula adjusts the cylinder 41 that component 4 includes the inside that level is fixed at the first bar 1, the upper surface that the first bar 1 is arranged in Sliding slot 11 and the connecting rod 21 that is vertically and fixedly arranged at the lower part of the second bar 2 and matches with the position of sliding slot 11, connecting rod 21 run through sliding slot 11 and are fixedly connected with the ejector rod part of cylinder 41, and the cylinder part of cylinder 41 is fixed by the support frame of its lower end The one end of inside far from parking stall import of first bar 1 is set, and the modes such as 41 available hydraulic cylinder of cylinder, drag chain replace, cylinder The end of 41 ejector rod part is fixedly connected with the lower end of connecting rod 21, and ejector rod part and the connecting rod 21 of cylinder 41 are vertically arranged, connecting rod 21 sliding slot 11 through the upper end for being provided with the first bar 1 connects the second bar 2, the fixed company vertical with the second bar 2 of connecting rod 21 It connects, the width of sliding slot 11 is slightly larger than the diameter of connecting rod 21, and the length of sliding slot 11 is configured according to the actual situation, guarantees to fit The rear-wheel parking stall position of the vehicle of different model is answered, while first one end of bar 1 far from parking stall import is arranged in sliding slot 11, and Match with flexible set in the position of the ejector rod part of cylinder 41, completes the positioning of vehicle rear wheel, front of the car is enable to guarantee concordantly Unanimously.
Further, Fig. 1 and Fig. 2 are please referred to, a kind of specific reality as parking limiting device provided by the utility model Mode is applied, cylinder 41 is electrically connected the flexible inductor 42 of the ejector rod part for controlling cylinder 41, and inductor 42 is fixedly installed First bar 1 is provided with one end of cylinder 41, inductor 42 is by receiving the signal of bluetooth from vehicle, GPS device, really The model for determining vehicle sends signal to third controller according to vehicle model, and third controller controls the mandril elongation of cylinder 41 Length, third controller is arranged on cylinder 41, so that the second bar 2 to the mandril for being connected to cylinder 41 positions, The stop position of vehicle rear wheel is limited, the length of the mandril elongation of the automobile cylinder 41 of different model is different, for wheelbase and vehicle The length of long shorter vehicle, the mandril elongation of cylinder 41 is longer, for wheelbase and the longer vehicle of vehicle commander, the mandril of cylinder 41 The length of elongation is shorter, to guarantee that headstock is substantially at concordant state, when preventing vehicle parking uneven, longer axis away from and vehicle commander Vehicle occupy Park Lane.
Further, Fig. 1 Fig. 2 and Fig. 4 are please referred to, one kind as parking limiting device provided by the utility model is specific Embodiment is additionally provided with second on the second bar 2 close to switch 22 and with second close to the second alert of the electric connection of switch 22 Device 23 is reported, the quantity of the second close switch 22 is two, is vertically set on the two sides of the upper surface of the second bar 2, the second alarm Device 23 is vertically set on the middle part of the upper surface of the second bar 2, the two second signal output end connections second close to switch 22 The signal input part of alarm device 23, when vehicle backing, when the tail part of vehicle covers in the second close switch 22, second is connect Nearly switch 22 sends signal to second controller, and second controller controls the sending of the second alarm device 23 and pipes, and second controller can On the second close switch 22 or it is arranged on the second alarm 23 with setting, reminds driver in time, grasp convenient for driver The position of vehicle prevents vehicle backing not in place or the second bar 2 of collision;The ring that first alarm device 33 and the second alarm device 23 issue The sound different from cried, can be set to the mode of voice reminder, cannot be according to the letter that pipes when preventing from driver from hearing piping signal Number corresponding adjustment is made to vehicle.
Further, Fig. 1 Fig. 2 and Fig. 4 are please referred to, one kind as parking limiting device provided by the utility model is specific Embodiment, the second shield 24 is fixedly installed on the second bar 2, and the second shield 24 is located at second close to switch 22 On the second alarm device 23, the second shield 24 is fixed at the upper surface of the second bar 2, and approaches 22 He of switch for second Second alarm device 23 is closed inside it, when vehicle shifts, as driver fails mentioning according to the second alarm device 23 in time Wake up stop vehicle, occur the second bar 2 of Vehicular impact when, the second shield 24 can prevent vehicle directly hits second approach open Pass 22 and the second alarm device 23 prevent the second close switch 22 and the second alarm device 23 because Vehicular impact is damaged, while the Two shields 24 closing second can prevent dust damage, sleet corrosion second close close to switch 22 and the second alarm device 23 Switch 22 and the second alarm device 23.
Further, referring to Fig. 1, as it is provided by the utility model parking limiting device a kind of specific embodiment party It is provided with the second through-hole 25 at formula, the second shield 24 and the second position for matching close to switch 22, the second through-hole 25 is arranged The second shield 24 upper surface and match with second close to the contact position of switch 22, guarantee that second approaches 22 energy of switch Enough perceive the position of vehicle in time by the second through-hole 25, meanwhile, embedded with transparent protection cap for sealing in the second through-hole 25 The second through-hole 25 of the second shield 24 is closed, second can perceive vehicle location by transparent protection cap close to switch 22, protect Protecting cover can prevent the second shield 24 of entrance of dust and sleet and damage the second close switch 22 and the second alarm inside it Device 23.
Further, Fig. 1 and Fig. 2 are please referred to, a kind of specific reality as parking limiting device provided by the utility model Mode is applied, the top of the first bar 1 is additionally provided with for covering the cover board 5 for adjusting component 4, and cover board 5 includes more and is vertically arranged Support rod and the end cap that is fixedly connected with the upper end of support rod, the lower end of more vertically disposed support rods is fixedly connected on The upper surface of one bar 1, the vertical section of end cap are " people " character form structure, and sleet is prevented to be deposited in the upper surface of end cap, and cover board 5 is used It prevents sleet by adjusting the sliding slot 11 of component 4 into the inside of the first bar 1 in covering adjusting component 4, makes in the first bar 1 Corrosion, which occurs, for the cylinder 41 in portion influences to run well.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (10)

1. stop limiting device, including be arranged in parallel with parking stall length direction and be located at parking stall two sides the first bar (1) and The second bar (2) being vertically set between two first bars (1), it is characterised in that: further include being arranged in two institutes State be additionally provided on detection components (3), first bar (1) for along first bar (1) on the first bar (1) Length direction adjust the adjusting component (4) of the second bar (2) position.
2. parking limiting device as described in claim 1, it is characterised in that: described to be set apart from detection components (3) including fixation Set the bracket (31) on first bar (1), be fixed on the bracket (31) for detecting the first of vehicle Close to switch (32) and be fixed on the bracket (31) and with described first close to switch (32) be electrically connected First alarm device (33).
3. parking limiting device as claimed in claim 2, it is characterised in that: be fixedly installed the on first bar (1) One shield (34), first shield (34) are located at the bracket (31), the first close switch (32) and the first alarm On device (33).
4. parking limiting device as claimed in claim 3, it is characterised in that: first shield (34) approaches with first and opens It closes and is provided with first through hole (35) at the position that (32) match.
5. parking limiting device as described in claim 1, it is characterised in that: the adjusting component (4) includes that horizontal fixation is set Set the inside of first bar (1) cylinder (41), setting the upper surface of first bar (1) sliding slot (11) with And the connecting rod (21) for being vertically and fixedly arranged at the lower part of second bar (2) and matching with the position of the sliding slot (11), The ejector rod part that the connecting rod (21) runs through the sliding slot (11) and is fixedly connected with the cylinder (41).
6. parking limiting device as claimed in claim 5, it is characterised in that: the cylinder (41) is electrically connected for controlling State the flexible inductor (42) of the mandril of cylinder (41).
7. parking limiting device as described in claim 1, it is characterised in that: be additionally provided with second on second bar (2) Close to switch (22) and the second alarm device (23) being electrically connected with described second close to switch (22).
8. parking limiting device as claimed in claim 7, it is characterised in that: be fixedly installed the on second bar (2) Two shields (24), second shield (24) are located at described second close on switch (22) and the second alarm device (23).
9. parking limiting device as claimed in claim 8, it is characterised in that: second shield (24) approaches with second and opens It closes and is provided with the second through-hole (25) at the position that (22) match.
10. parking limiting device as described in claim 1, it is characterised in that: be additionally provided with above first bar (1) For covering the cover board (5) for adjusting component (4).
CN201820512612.2U 2018-04-11 2018-04-11 Stop limiting device Expired - Fee Related CN208633630U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820512612.2U CN208633630U (en) 2018-04-11 2018-04-11 Stop limiting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820512612.2U CN208633630U (en) 2018-04-11 2018-04-11 Stop limiting device

Publications (1)

Publication Number Publication Date
CN208633630U true CN208633630U (en) 2019-03-22

Family

ID=65731821

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820512612.2U Expired - Fee Related CN208633630U (en) 2018-04-11 2018-04-11 Stop limiting device

Country Status (1)

Country Link
CN (1) CN208633630U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110686916A (en) * 2019-10-24 2020-01-14 苏州创驰检测技术有限公司 Air duct heater detection device
CN111042599A (en) * 2019-12-17 2020-04-21 张明睿 Intelligent parking device for parking lot
CN112412135A (en) * 2020-12-15 2021-02-26 田敏 Garage with limiting function
CN113389420A (en) * 2021-08-18 2021-09-14 深圳市智为时代科技有限公司 New energy automobile tire clamping device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110686916A (en) * 2019-10-24 2020-01-14 苏州创驰检测技术有限公司 Air duct heater detection device
CN111042599A (en) * 2019-12-17 2020-04-21 张明睿 Intelligent parking device for parking lot
CN111042599B (en) * 2019-12-17 2021-07-09 张明睿 Intelligent parking device for parking lot
CN112412135A (en) * 2020-12-15 2021-02-26 田敏 Garage with limiting function
CN112412135B (en) * 2020-12-15 2022-01-18 青岛芯之丰智能科技有限公司 Garage with limiting function
CN113389420A (en) * 2021-08-18 2021-09-14 深圳市智为时代科技有限公司 New energy automobile tire clamping device
CN113389420B (en) * 2021-08-18 2021-10-15 深圳市智为时代科技有限公司 New energy automobile tire clamping device

Similar Documents

Publication Publication Date Title
CN208633630U (en) Stop limiting device
CN103568941B (en) Automobile driving control device and automobile driving control method
CN203093873U (en) Automobile anti-tailgating control device
CN105730325A (en) Automobile dead zone detection system
CN204383299U (en) A kind of caution system for tunnel safety driving
CN102815260B (en) A kind of back mirror and vehicle
CN201970915U (en) Vehicular information projection system
CN207829565U (en) A kind of road safety parking stall limiting device
CN202925489U (en) An indicating device preventing mistaken red light running
CN109941276A (en) Side lane collision warning systems
CN206510825U (en) A kind of vehicle travels road conditions automatic detection device
CN204895279U (en) Car door is opened and is reminded safety warning device
CN110171401A (en) A kind of Intelligent brake system and method
CN210970888U (en) Lane departure and anti-collision early warning device
CN104691628B (en) Auto spring out type automobile B-column, control system and automobile
CN209426716U (en) A kind of pedestrian's anticollision assistant equipments on board
CN208149164U (en) A kind of arrangements for automotive doors with light bar prompt
CN206691062U (en) A kind of guard circle of new energy electric motor vehicle
CN208585166U (en) A kind of new automobile safety reminding device
CN204077521U (en) A kind of bend auxiliary lighting corner lamp
CN206870975U (en) The detection external member of blind spot detection system
CN202896394U (en) Vehicle scratch collision avoidance device capable of automatically sensing and alarming
CN203344815U (en) Safety device for crossing turning of automobile
CN203511445U (en) Automobile lamplight warning device
JP3222401U (en) A communication system that senses the reverse running of a car at the exit of a freeway and lights the lamp

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190322

CF01 Termination of patent right due to non-payment of annual fee