CN209250812U - A kind of embedded intelligence distributing frame - Google Patents

A kind of embedded intelligence distributing frame Download PDF

Info

Publication number
CN209250812U
CN209250812U CN201920275217.1U CN201920275217U CN209250812U CN 209250812 U CN209250812 U CN 209250812U CN 201920275217 U CN201920275217 U CN 201920275217U CN 209250812 U CN209250812 U CN 209250812U
Authority
CN
China
Prior art keywords
screw rod
outer housing
pedestal
distributing frame
column
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
CN201920275217.1U
Other languages
Chinese (zh)
Inventor
陈金鱼
姚树香
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.)
Xiamen Software Vocationl Technical College
Original Assignee
Xiamen Software Vocationl Technical College
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 Xiamen Software Vocationl Technical College filed Critical Xiamen Software Vocationl Technical College
Priority to CN201920275217.1U priority Critical patent/CN209250812U/en
Application granted granted Critical
Publication of CN209250812U publication Critical patent/CN209250812U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Patch Boards (AREA)

Abstract

The utility model discloses a kind of embedded intelligence distributing frames, belong to distributing frame technical field, solve the problems, such as that existing apparatus can not protect electric wire;Its technical characteristic is: including outer housing, inner housing, pedestal and column, it is slidably connected between the outer housing and inner housing, pedestal is provided with below outer housing, column is provided with above pedestal, pedestal and column weld, the upper end of column has been bolted insulation transverse slat, inner thread sleeve is fixedly installed on insulation transverse slat, the internal whorl of inner thread sleeve is connected with the second screw rod, the upper end of second screw rod is welded with external screw thread turntable, the lower end of second screw rod and outer housing are rotatablely connected, uniformly distributed multiple connection jaws on the inner housing, sealing flange has been snapped connection on connection jaws, the utility model is easy to operate, it is easy to use, can the height to outer housing and inner housing flexibly adjusted, it is provided with cooling mechanism simultaneously, more existing distributing frame heat dissipation performance is more preferable, conducive to popularization and use.

Description

A kind of embedded intelligence distributing frame
Technical field
The utility model relates to distributing frame technical field more particularly to a kind of embedded intelligence distributing frames.
Background technique
Distributing frame can be used in final exchange line or junction line, and can they be carried out with allotment connection, and distributing frame is management Most important component in subsystem is the hinge for realizing vertical main line and horizontal wiring two subsystems interconnection, distributing frame It is typically mounted on cabinet or wall, by installing attachment, distributing frame can completely meet UTP, STP, coaxial cable, optical fiber, sound The needs of video, common distributing frame has twisted-pair wire-distributing frame and fibre distribution frame in network engineering, according to place to use, uses The difference on way is divided into main frame and intermediate distrubuting frame two major classes.
Chinese patent CN206401722U discloses a kind of distributing frame being easily installed, including distributing frame front side board, wiring The front surface insertion of frame front side board is provided with line interface, and the front surface left and right ends of distributing frame front side board are provided with front side The junction of plate fixed card buckle, the front side board fixed card buckle and distributing frame front side board is provided with front side board buckle fixed frame, and Front side board buckle fixed lobe is provided in front side board fixed card buckle, the rear of the distributing frame front side board is provided with distributing frame and matches Wire box is provided with side fixed card buckle, the side fixed card buckle and distributing frame wiring at left and right sides of distributing frame distributing box The junction of box is provided with side buckle fixed frame;The device front side board fixed card buckle replaces traditional bolt fixing method, only It needs for distributing frame to be placed on the corresponding position of main frame to be installed, due to being provided with reset bullet on the inside of buckle Spring detains it firmly and on main frame, avoids the problem of being moved forward and backward after distributing frame installs;But the device is not Electric wire can be protected, cause electric wire is naked to be exposed on the external, shorten the service life of distributing frame, therefore, it is proposed that one Kind embedded intelligence distributing frame.
Utility model content
The purpose of this utility model is to provide a kind of embedded intelligence distributing frame, including outer housing, inner housing, pedestal and Column is slidably connected between the outer housing and inner housing, and pedestal is provided with below outer housing, is provided with above pedestal vertical Column, pedestal and column weld, and the upper end of column has been bolted insulation transverse slat, are fixedly installed with inner screw sheath on the transverse slat that insulate Cylinder, the internal whorl of inner thread sleeve are connected with the second screw rod, and the upper end of the second screw rod is welded with external screw thread turntable, the second screw rod Lower end and outer housing be rotatablely connected, uniformly distributed multiple connection jaws on the inner housing have snapped connection sealing flange on connection jaws, To solve the problems, such as that existing apparatus can not protect electric wire.
To achieve the above object, the utility model provides the following technical solutions:
A kind of embedded intelligence distributing frame, including outer housing, inner housing, pedestal and column, the outer housing and inner housing Between be slidably connected, pedestal is provided with below outer housing, is provided with column above pedestal, pedestal and column weld, column Upper end be bolted insulation transverse slat, be fixedly installed with inner thread sleeve, the internal whorl of inner thread sleeve on the transverse slat that insulate It is connected with the second screw rod, the upper end of the second screw rod is welded with external screw thread turntable, and the lower end of the second screw rod and outer housing are rotatablely connected, It is evenly distributed with multiple connection jaws on the inner housing, has snapped connection sealing flange on connection jaws.
As a further solution of the present invention: being equipped with sliding slot in the connection jaws, and sliding slot is fixed with inner housing Connection, is provided with inner cavity in outer housing, it is interior it is intracavitary it is vertically-mounted have connecting rod, the both ends of connecting rod slidably connect horizontal slide rail, It is bolted to connection between horizontal slide rail and outer housing, is fixedly connected between the connection jaws and connecting rod by socket, even It is arranged in parallel with slide plate on the right side of bar, is bolted to connection between connecting rod and slide plate, the internal diameter of sliding slot is less than connection jaws Internal diameter.
Work drive motor is fixedly installed at the top of inner cavity as a further solution of the present invention, work drive motor Output end is welded with the first screw rod, is connected between the first screw rod and outer housing by limit plate, and the first screw rod and limit plate turn Dynamic connection is symmetrically installed there are two threaded rod on the first screw rod, and the first screw rod is threadedly coupled with threaded rod, threaded rod and slide plate it Between pass through hinge bar connect.
As a further solution of the present invention, it is described it is interior it is intracavitary be provided with cooling mechanism, cooling mechanism includes turning Axis, first gear, second gear, limit runner and exhaust fan, the first gear are fixedly mounted on the middle part of the first screw rod, the Shaft is provided on the right side of one gear, the middle part of shaft is arranged in limit runner, and limits in runner and open up annular groove, annular Second gear is installed, first gear is engaged with second gear, and the upper end of shaft is equipped with exhaust fan in groove.
In conclusion the beneficial effects of the utility model are: the setting of sealing flange can play electric wire in inner housing The effect of insulation protection avoids the generation of electric power accident, and limit plate has the function of limiting the first screw rod, and described first Bar, which rotates, can also drive shaft and exhaust fan to rotate, to realize the purpose for accelerating interior intracavitary air stream dynamic, be conducive to interior The heat dissipation of intracavitary electric wire avoids the generation of electric power accident;The utility model is easy to operate, easy to use, can be to outer housing It is flexibly adjusted with the height of inner housing, while being provided with cooling mechanism, more existing distributing frame heat dissipation performance is more preferable, benefit In popularization and use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of outer housing in utility model.
Fig. 2 is the main view of embodiment 1 in utility model.
Fig. 3 is the main view of inner housing in utility model.
Fig. 4 is the structural schematic diagram of embodiment 2 in utility model.
Fig. 5 is the structural schematic diagram of cooling mechanism in utility model.
In figure: 1- outer housing, 2- horizontal slide rail, 3- inner housing, 4- connection jaws, 5- sliding slot, the inner cavity 6-, 7- connecting rod, 8- are inserted Seat, 9- slide plate, 10- hinge bar, 11- work drive motor, 12- limit plate, the first screw rod of 13-, 14- threaded rod, 15- pedestal, 16- are vertical Column, 17- insulation transverse slat, 18- inner thread sleeve, 19- external screw thread turntable, the second screw rod of 20-, 21- sealing flange, 22- shaft, 23- first gear, 24- second gear, 25- limit runner, 26- exhaust fan.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
As shown in Figures 1 to 3, in the utility model embodiment, including outer housing 1, inner housing 3, pedestal 15 and column 16, institute It states and is slidably connected between outer housing 1 and inner housing 3, the lower section of outer housing 1 is provided with pedestal 15, and the top of pedestal 15 is provided with vertical Column 16, pedestal 15 and column 16 weld, and the upper end of column 16 has been bolted insulation transverse slat 17, are fixedly mounted on the transverse slat 17 that insulate There is inner thread sleeve 18, the internal whorl of inner thread sleeve 18 is connected with the second screw rod 20, and the upper end of the second screw rod 20 is welded with External screw thread turntable 19, the lower end of the second screw rod 20 and outer housing 1 are rotatablely connected, when needing to adjust the outer housing 1 and inner housing 3 Height when, rotate clockwise external screw thread turntable 19, external screw thread turntable 19 is able to drive the rotation of the second screw rod 20, so that the Two screw rods 20 drive outer housing 1 and horizontal slide rail 2 to move up, and realize the adjusting to 3 height of outer housing 1 and inner housing;
It is evenly distributed with multiple connection jaws 4 on the inner housing 3, has snapped connection sealing flange 21, sealing flange 21 on connection jaws 4 Setting can play the role of insulation protection to electric wire in inner housing 3, avoid the generation of electric power accident;
Sliding slot 5 is installed, the internal diameter of sliding slot 5 is less than the internal diameter of connection jaws 4, and sliding slot 5 and inner housing in the connection jaws 4 3 are fixedly connected, and are provided with inner cavity 6 in outer housing 1, and vertically-mounted in inner cavity 6 to have connecting rod 7, the both ends of connecting rod 7 slidably connect Horizontal slide rail 2 is bolted to connection between horizontal slide rail 2 and outer housing 1, by inserting between the connection jaws 4 and connecting rod 7 Seat 8 is fixedly connected, and the right side of connecting rod 7 is arranged in parallel with slide plate 9, is bolted to connection between connecting rod 7 and slide plate 9;
The top of inner cavity 6 is fixedly installed with work drive motor 11, and the output end of work drive motor 11 is welded with the first screw rod 13, the It is connected between one screw rod 13 and outer housing 1 by limit plate 12, and the first screw rod 13 is rotatablely connected with limit plate 12, limit plate 12 Have the function of limiting the first screw rod 13, is symmetrically installed that there are two threaded rod 14, the first screw rod 13 and spiral shells on the first screw rod 13 Rasp bar 14 is threadedly coupled, and is connected between threaded rod 14 and slide plate 9 by hinge bar 10, is needed to adjust 3 phase of outer housing 1 and inner housing When to position, start work drive motor 11, work drive motor 11 drives first screw rod 13 to rotate, and the first screw rod 13 drives threaded rod 14 incorgruous movements, threaded rod 14 pulls inner housing 3, connecting rod 7 and slide plate 9 to move right, to realize to outer housing 1 and inner casing The adjusting of 3 position of body, realizes the protection to electric wire.
Embodiment 2
As shown in Figures 4 and 5, in the utility model embodiment, including outer housing 1, inner housing 3, pedestal 15 and column 16, institute It states and is slidably connected between outer housing 1 and inner housing 3, the lower section of outer housing 1 is provided with pedestal 15, and the top of pedestal 15 is provided with vertical Column 16, pedestal 15 and column 16 weld, and the upper end of column 16 has been bolted insulation transverse slat 17, are fixedly mounted on the transverse slat 17 that insulate There is inner thread sleeve 18, the internal whorl of inner thread sleeve 18 is connected with the second screw rod 20, and the upper end of the second screw rod 20 is welded with External screw thread turntable 19, the lower end of the second screw rod 20 and outer housing 1 are rotatablely connected, when needing to adjust the outer housing 1 and inner housing 3 Height when, rotate clockwise external screw thread turntable 19, external screw thread turntable 19 is able to drive the rotation of the second screw rod 20, so that the Two screw rods 20 drive outer housing 1 and horizontal slide rail 2 to move up, and realize the adjusting to 3 height of outer housing 1 and inner housing;
It is evenly distributed with multiple connection jaws 4 on the inner housing 3, has snapped connection sealing flange 21, sealing flange 21 on connection jaws 4 Setting can play the role of insulation protection to electric wire in inner housing 3, avoid the generation of electric power accident;
Sliding slot 5 is installed, the internal diameter of sliding slot 5 is less than the internal diameter of connection jaws 4, and sliding slot 5 and inner housing in the connection jaws 4 3 are fixedly connected, and are provided with inner cavity 6 in outer housing 1, and vertically-mounted in inner cavity 6 to have connecting rod 7, the both ends of connecting rod 7 slidably connect Horizontal slide rail 2 is bolted to connection between horizontal slide rail 2 and outer housing 1, by inserting between the connection jaws 4 and connecting rod 7 Seat 8 is fixedly connected, and the right side of connecting rod 7 is arranged in parallel with slide plate 9, is bolted to connection between connecting rod 7 and slide plate 9;
The top of inner cavity 6 is fixedly installed with work drive motor 11, and the output end of work drive motor 11 is welded with the first screw rod 13, the It is connected between one screw rod 13 and outer housing 1 by limit plate 12, and the first screw rod 13 is rotatablely connected with limit plate 12, limit plate 12 Have the function of limiting the first screw rod 13, is symmetrically installed that there are two threaded rod 14, the first screw rod 13 and spiral shells on the first screw rod 13 Rasp bar 14 is threadedly coupled, and is connected between threaded rod 14 and slide plate 9 by hinge bar 10, is needed to adjust 3 phase of outer housing 1 and inner housing When to position, start work drive motor 11, work drive motor 11 drives first screw rod 13 to rotate, and the first screw rod 13 drives threaded rod 14 incorgruous movements, threaded rod 14 pulls inner housing 3, connecting rod 7 and slide plate 9 to move right, to realize to outer housing 1 and inner casing The adjusting of 3 position of body, realizes the protection to electric wire.
Cooling mechanism is provided in the inner cavity 6, cooling mechanism includes shaft 22, first gear 23, second gear 24, limit Position runner 25 and exhaust fan 26, the first gear 23 are fixedly mounted on the middle part of the first screw rod 13, the right side of first gear 23 It is provided with shaft 22, the middle part of shaft 22 is arranged in limit runner 25, and limits in runner 25 and open up annular groove, annular groove Second gear 24 is inside installed, first gear 23 is engaged with second gear 24, and the upper end of shaft 22 is equipped with exhaust fan 26, air draft Fan 26 is the prior art, is not described in detail here, and the rotation of the first screw rod 13 can also drive shaft 22 and exhaust fan 26 to rotate, To realize the purpose for accelerating air flowing in inner cavity 6, is conducive to the heat dissipation of electric wire in inner cavity 6, avoids electric power accident Occur.
In conclusion the working principle of the utility model is: being opened when needing to adjust 3 relative position of outer housing 1 and inner housing Dynamic work drive motor 11, work drive motor 11 drive first screw rod 13 to rotate, and the first screw rod 13 drives the incorgruous movement of threaded rod 14, Threaded rod 14 pulls inner housing 3, connecting rod 7 and slide plate 9 to move right, to realize the tune to 3 position of outer housing 1 and inner housing Section realizes the protection to electric wire, and the rotation of the first screw rod 13 can also drive shaft 22 and exhaust fan 26 to rotate, thus real Show the purpose for accelerating air flowing in inner cavity 6, has been conducive to the heat dissipation of electric wire in inner cavity 6, avoids the generation of electric power accident, this Utility model is easy to operate, easy to use, can the height to outer housing 1 and inner housing 3 flexibly adjusted, be arranged simultaneously Cooling mechanism, more existing distributing frame heat dissipation performance is more preferable, is conducive to promote the use of.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the utility model and creates and simplify description, rather than The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot It is construed as a limitation of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as Indication or suggestion relative importance or the quantity for implicitly indicating indicated technical characteristic." first ", " are defined as a result, Two " etc. feature can explicitly or implicitly include one or more of the features.It removes in the description of the present invention, Non- to be otherwise noted, the meaning of " plurality " is two or more.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (6)

1. a kind of embedded intelligence distributing frame, including outer housing (1), inner housing (3), pedestal (15) and column (16), described outer It is slidably connected, is provided with below outer housing (1) pedestal (15) between shell (1) and inner housing (3), pedestal is set above (15) It is equipped with column (16), pedestal (15) and column (16) are welded, which is characterized in that it is horizontal that the upper end of column (16) has been bolted insulation Plate (17), insulation transverse slat (17) on be fixedly installed with inner thread sleeve (18), the internal whorl of inner thread sleeve (18) is connected with Second screw rod (20), the upper end of the second screw rod (20) are welded with external screw thread turntable (19), the lower end of the second screw rod (20) and shell Body (1) rotation connection.
2. embedded intelligence distributing frame according to claim 1, which is characterized in that uniformly distributed multiple on the inner housing (3) Connection jaws (4) have snapped connection sealing flange (21) on connection jaws (4).
3. embedded intelligence distributing frame according to claim 2, which is characterized in that be equipped with cunning in the connection jaws (4) Slot (5), and sliding slot (5) is fixedly connected with inner housing (3), is provided with inner cavity (6) in outer housing (1), it is vertically-mounted in inner cavity (6) Have connecting rod (7), the both ends of connecting rod (7) slidably connect horizontal slide rail (2), pass through between horizontal slide rail (2) and outer housing (1) Bolt is fixedly connected, and is fixedly connected between the connection jaws (4) and connecting rod (7) by socket (8), the right side of connecting rod (7) is parallel It is provided with slide plate (9), is bolted to connection between connecting rod (7) and slide plate (9).
4. embedded intelligence distributing frame according to claim 3, which is characterized in that the internal diameter of sliding slot (5) is less than connection jaws (4) internal diameter.
5. embedded intelligence distributing frame according to claim 3 or 4, which is characterized in that the top of inner cavity (6) is fixedly mounted Have work drive motor (11), the output end of work drive motor (11) is welded with the first screw rod (13), the first screw rod (13) and outer housing (1) Between connected by limit plate (12), and the first screw rod (13) and limit plate (12) are rotatablely connected, symmetrical on the first screw rod (13) There are two threaded rod (14) for installation, and the first screw rod (13) is threadedly coupled with threaded rod (14), between threaded rod (14) and slide plate (9) It is connected by hinge bar (10).
6. embedded intelligence distributing frame according to claim 5, which is characterized in that be provided with heat dissipation in the inner cavity (6) Mechanism, cooling mechanism include shaft (22), first gear (23), second gear (24), limit runner (25) and exhaust fan (26), The first gear (23) is fixedly mounted on the middle part of the first screw rod (13), and first gear is provided with shaft on the right side of (23) (22), limit runner (25) setting is at the middle part of shaft (22), and limits and open up annular groove in runner (25), in annular groove It is equipped with second gear (24), first gear (23) is engaged with second gear (24), and the upper end of shaft (22) is equipped with exhaust fan (26).
CN201920275217.1U 2019-03-05 2019-03-05 A kind of embedded intelligence distributing frame Expired - Fee Related CN209250812U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920275217.1U CN209250812U (en) 2019-03-05 2019-03-05 A kind of embedded intelligence distributing frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920275217.1U CN209250812U (en) 2019-03-05 2019-03-05 A kind of embedded intelligence distributing frame

Publications (1)

Publication Number Publication Date
CN209250812U true CN209250812U (en) 2019-08-13

Family

ID=67537382

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920275217.1U Expired - Fee Related CN209250812U (en) 2019-03-05 2019-03-05 A kind of embedded intelligence distributing frame

Country Status (1)

Country Link
CN (1) CN209250812U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113131270A (en) * 2021-04-14 2021-07-16 广州宝狮新能源有限公司 Adjusting tool for telephone communication wiring equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113131270A (en) * 2021-04-14 2021-07-16 广州宝狮新能源有限公司 Adjusting tool for telephone communication wiring equipment

Similar Documents

Publication Publication Date Title
CN209250812U (en) A kind of embedded intelligence distributing frame
CN207184001U (en) A kind of bus duct system of new jack box and the application jack box
CN108749564A (en) A kind of radiator of good heat dissipation effect for new-energy automobile
CN211928253U (en) Optical cable distributing box with heat dissipation and cooling functions
CN112670107A (en) Automatic power-off device for software graphic interface test and server
CN208637983U (en) A kind of bus duct with grafting conversion function
CN116979462A (en) Intensive bus duct
CN208547754U (en) A kind of communication engineering optical fiber installs case being easily installed
CN116365381A (en) Outdoor waterproof communication equipment electric power cabinet
CN216554228U (en) Heat dissipation device of wind generating set
CN207283299U (en) A kind of motor casing with split type easily assembling cooling mechanism
CN215681697U (en) Insulating waterproof epoxy resin pouring bus duct of high heat dissipation
CN212875067U (en) Reactive power equipment monitoring control device based on thing networking
CN108895515A (en) Intelligent efficient energy-saving electric heater
CN113972615A (en) Energy-saving bus duct with high-protection-level copper-aluminum composite conductor and use method thereof
CN207488540U (en) A kind of cool fine disk of optical fiber splicer
CN215646036U (en) Online hot plug structure of jack box double-circuit based on bus duct
CN218941243U (en) Intelligent gateway quick access equipment
CN214256998U (en) Novel heat dissipation of electron electrical equipment device
CN216929604U (en) Distributed energy grid-connected power supply connector protection mechanism
CN212064684U (en) Electromechanical device heat dissipation protection architecture
CN219625928U (en) Serial port server convenient to disassemble and assemble
CN216248475U (en) Optical divider with water-proof effect
CN220857256U (en) Block terminal with separate winding displacement subassembly
CN214312844U (en) Inductor with good heat dissipation performance

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: 20190813

Termination date: 20200305

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