CN202520748U - Anti-drop screw and electric energy meter comprising same - Google Patents
Anti-drop screw and electric energy meter comprising same Download PDFInfo
- Publication number
- CN202520748U CN202520748U CN2012201019745U CN201220101974U CN202520748U CN 202520748 U CN202520748 U CN 202520748U CN 2012201019745 U CN2012201019745 U CN 2012201019745U CN 201220101974 U CN201220101974 U CN 201220101974U CN 202520748 U CN202520748 U CN 202520748U
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- screw
- drop
- electric energy
- energy meter
- boss
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Abstract
The utility model discloses an anti-drop screw of an electric energy meter. An upper thread part and a lower thread part are arranged on a threaded rod. A polished rod part is arranged between the upper thread part and the lower thread part, and the diameter of the polished rod part is between the external diameter of the upper thread part and the external diameter of the lower thread part. The diameter of the upper thread part is same with the diameter of the lower thread part. The utility model also provides the electric energy meter comprising the anti-drop screw. The electric energy meter has the advantages of convenience in disassembly and assembly and convenience in process manufacture and can prevent the screw from dropping.
Description
Technical field
The utility model relates to instrument field, more particular it, the utility model relates to a kind of Drop-proof screw and is provided with the electric energy meter of this Drop-proof screw.
Background technique
The screw commonly used of instrument encapsulation at present is generally the form of Full Thread FT or part screw thread.For the part threaded screw, as shown in Figure 1, in the process that electric energy meter upper shell that it is fixed 2 and lower shell body 4 unclamp; If ceaselessly unscrew screw 1; Then screw 1 is easy to from housing, break away from, and must place it in the keeping of suitable place then, otherwise loses easily or damage; And such problem also obviously can appear in the Full Thread FT screw, and therefore present table meter encapsulation does not have the Drop-proof function with nail.
The model utility content
The utility model technical problem to be solved just provides a kind of Drop-proof screw with Drop-proof function, has easy disassembly, the easily manufactured advantage of technology.
In order to solve the problems of the technologies described above; The utility model adopts following technological scheme: a kind of Drop-proof screw; It is characterized in that: be provided with screw section and following screw section on the screw rod, be provided with between screw section and the following screw section on said diameter between on polished rod portion between screw section external diameter and the following screw section external diameter.
Preferably, the said screw section of going up is identical with the diameter of following screw section.
The utility model also provides a kind of electric energy meter that is provided with aforementioned Drop-proof screw; Said electric energy meter is enclosed by upper shell and lower shell body envelope and combines to form; In said upper shell, be provided with screw; In said lower shell body, be provided with nut accordingly with rigging screw, it is characterized in that: the screw of said upper shell is provided with the boss that cooperates with the polished rod portion of said Drop-proof screw, and the diameter of said boss is between down between screw section external diameter and the polished rod portion diameter.
Preferably, said boss is rubber boss or plastics boss.
Said screw section and the boss screw-thread fit of going up.
The advantage of the utility model is conspicuous, unscrew the nut of throwing off lower shell body at the Drop-proof screw after, polished rod portion gets into lug boss position, in any case rotation this moment, screw is also only in upper shell idle running and can from the screw of upper shell, not deviate from.And when upper and lower casing temporarily combined, because of the boss diameter of screw section diameter on the screw rod greater than upper shell, so the utility model Drop-proof screw can not be stuck in the nut upper end of lower shell body to lower slider, thereby easy disassembly and technology are easily manufactured.
Description of drawings
Fig. 1 is the utilization structure schematic diagram of existing technology electric energy meter screw;
Fig. 2 is the vertical section structure schematic diagram of the utility model Drop-proof screw preferred embodiment;
Fig. 3 is the preferred embodiment structure principle chart of the electric energy meter of installing the utility model Drop-proof screw.
Embodiment
As shown in Figure 2; The utility model Drop-proof screw embodiment; Be provided with screw section 7 and following screw section 8 on the screw rod; Be provided with between last screw section 7 and the following screw section 8 between on polished rod portion 9 between screw section external diameter and the following screw section external diameter, it is identical with the diameter of following screw section 8 to go up screw section 7 in the present embodiment.
As shown in Figure 3; The electric energy meter that the utility model is provided with the Drop-proof screw is enclosed by upper shell 2 and lower shell body 4 envelopes and combines to form; In order to simplify description; Only show the cut-away section structural drawing of the utility model electric energy meter among the figure, in upper shell 2, be provided with screw 5, in lower shell body 4, be provided with nut 3 accordingly with assembling Drop-proof screw 1.The screw 5 of upper shell 2 is provided with a boss 6, and boss is rubber boss or plastics boss, said go up the screw section can with the boss screw-thread fit.Unscrew the nut 3 of disengagement lower shell body 4 at Drop-proof screw 1 after, polished rod portion 9 gets into the position of boss 6, in any case rotation this moment, screw 1 also only transfers can from the screw 5 of upper shell 2, not deviate from upper shell 2 hollows.And at upper shell 2 and lower shell body during 4 temporary transient combinations, because of 7 diameters of screw section on the screw rod are not less than boss 6 diameters of upper shell 2, so Drop-proof screw 1 can not be stuck in nut 3 upper ends of lower shell body 4 to lower slider.
The utility model Drop-proof screw can be made of plastics, and reduces cost, has saved screw thread processing and has assembled defectives such as loaded down with trivial details.
The easy disassembly of Drop-proof screw and the technology of the utility model are easily manufactured, and the know-why that the utility model is advocated also can be implemented on other instrument and apparatus, is not limited only to electric energy meter, therefore are worthy to be popularized.
Claims (5)
1. Drop-proof screw is characterized in that: be provided with screw section (7) and following screw section (8) on the screw rod, be provided with between screw section (7) and the following screw section (8) on said diameter between last screw section external diameter and following screw section external diameter polished rod portion (9).
2. Drop-proof screw as claimed in claim 1 is characterized in that: the said screw section (7) of going up is identical with the diameter of following screw section (8).
3. electric energy meter that is provided with claim 1 or 2 said Drop-proof screws; It is enclosed by upper shell (2) and lower shell body (4) envelope and combines to form; In said upper shell (2), be provided with screw (5); In said lower shell body (4), be provided with nut (3) accordingly with rigging screw, it is characterized in that: the screw (5) of said upper shell (2) is provided with the boss (6) that cooperates with the polished rod portion of said Drop-proof screw, and the diameter of said boss is between down between screw section external diameter and the polished rod portion diameter.
4. electric energy meter according to claim 3 is characterized in that: said boss (6) is rubber boss or plastics boss.
5. electric energy meter according to claim 3 is characterized in that: said screw section and the boss screw-thread fit of going up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201019745U CN202520748U (en) | 2012-03-16 | 2012-03-16 | Anti-drop screw and electric energy meter comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201019745U CN202520748U (en) | 2012-03-16 | 2012-03-16 | Anti-drop screw and electric energy meter comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520748U true CN202520748U (en) | 2012-11-07 |
Family
ID=47103700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201019745U Expired - Fee Related CN202520748U (en) | 2012-03-16 | 2012-03-16 | Anti-drop screw and electric energy meter comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560710A (en) * | 2013-10-31 | 2014-02-05 | 苏州艾克威尔科技有限公司 | Soft starter with falling-preventing function |
-
2012
- 2012-03-16 CN CN2012201019745U patent/CN202520748U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560710A (en) * | 2013-10-31 | 2014-02-05 | 苏州艾克威尔科技有限公司 | Soft starter with falling-preventing function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20210316 |