CN116794365A - Terminal protection mechanism for ammeter and ammeter - Google Patents
Terminal protection mechanism for ammeter and ammeter Download PDFInfo
- Publication number
- CN116794365A CN116794365A CN202210264785.8A CN202210264785A CN116794365A CN 116794365 A CN116794365 A CN 116794365A CN 202210264785 A CN202210264785 A CN 202210264785A CN 116794365 A CN116794365 A CN 116794365A
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- Prior art keywords
- terminal
- hole
- holes
- protective cover
- electric meter
- Prior art date
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- 230000004224 protection Effects 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 230000001681 protective effect Effects 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 13
- 229920003023 plastic Polymers 0.000 claims description 13
- 239000004033 plastic Substances 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 9
- 206010014357 Electric shock Diseases 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010923 batch production Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009979 protective mechanism Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
Abstract
The invention relates to the technical field of electronic meters, and particularly discloses a terminal protection mechanism for an ammeter, which comprises an annular terminal and an insulating protective cover, wherein the insulating protective cover is connected to the bottom of the annular terminal and can play an insulating protection role on the bottom of the annular terminal.
Description
Technical Field
The invention relates to the technical field of electronic meters, in particular to a terminal protection mechanism for an ammeter and the ammeter.
Background
In some areas, there is a certain requirement on the safety area of the electric meter, usually an electric meter safety house or an electric meter safety box is arranged outside the electric meter to avoid the dangerous accident caused by electric shock due to external interference, but when the electric meter safety house or the electric meter safety box is damaged to enable the electric meter to be in a dangerous state when the electric meter is exposed outdoors, as shown in fig. 1-3, the electric meter 1' comprises a meter case base 4', a relay and a terminal box 6', an annular terminal 2' is arranged in the terminal box 6', a lead-out sheet 5' of the relay is arranged in the annular terminal 2', and when a cable is installed, a screw is loosened, the cable is installed, the screw is locked again, and when the cable is disassembled, the screw is loosened to take out the cable, and then the screw is locked again. Therefore, the electricity meter is not electrified under the condition of normal no cable, but if the equipment fails, the main switch is powered off, and the electricity meter is still electrified, at this time, if the electricity meter is exposed outdoors, the electricity meter is in a dangerous state, for example, the metal rod 3' is an analog external conductor object in fig. 2, and the metal rod 3' can easily pass through the cable mounting hole 7' of the electricity meter 1' to be in contact with the bottom of the annular terminal 2', so that an electric shock accident occurs, and a great potential safety hazard exists.
Disclosure of Invention
The present invention is directed to a terminal protection mechanism for an electric meter and an electric meter, which solve the above-mentioned problems.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a terminal protection machanism for ammeter includes annular terminal and insulating protection casing, and insulating protection casing connects in annular terminal bottom to form insulating protection to annular terminal bottom.
Preferably, the ring terminal has a cable insertion side, and the insulating boot extends toward the cable insertion side such that an end of the insulating boot protrudes from a bottom side surface of the ring terminal.
Preferably, the insulating shield extends over at least the cable insertion side up to cover the annular terminal bottom side.
Preferably, the ring terminal is injection molded integrally with the insulating shield.
Preferably, the ring terminal is injection molded integrally with the insulating boot after assembly.
Preferably, the bottom of the annular terminal is provided with a long slot hole and a first through hole which are mutually communicated, and when injection molding is performed, plastic can be solidified to form a fixed column through the long slot hole, the first through hole and finally the first through hole, so that the insulation protection cover and the annular terminal are integrally injection molded.
Preferably, the bottom of the annular terminal is provided with a long slot hole and a first through hole which are mutually communicated, the bottom of the insulating protective cover is also provided with a bottom slot hole and a second through hole which are mutually communicated, the second through hole corresponds to the first through hole one by one, and when injection molding is carried out, plastics can be solidified to form a fixed column through the long slot hole, the first through hole, the second through hole and the bottom slot hole and finally in the first through hole and the second through hole, so that the insulating protective cover and the annular terminal are integrally injection molded.
Preferably, the second through holes and the bottom slot holes are circular holes, the diameter of the bottom slot hole is larger than that of the second through holes, the plurality of second through holes are correspondingly arranged above the bottom slot holes, and in a projection state, all the second through holes are located in a space range surrounded by the bottom slot holes.
Preferably, the long slot hole is a runway-shaped long hole, the first through hole is a circular hole, and the plurality of circular holes are correspondingly arranged below the runway-shaped long hole.
Preferably, the length of the long slot hole is greater than the length of a single first through hole, and in the projection state, all the first through holes are located in the space range surrounded by the long slot hole.
Preferably, the ring terminal is a metal piece and the insulating shield is a plastic piece.
The invention also provides an ammeter which comprises an ammeter shell base, a relay, a terminal box and any one of the terminal protection mechanisms for the ammeter, wherein the terminal protection mechanism is arranged in the terminal box and comprises an annular terminal and an insulating protective cover, the leading-out sheet of the relay is positioned in the annular terminal, and the inserting side of the leading-out sheet is opposite to the inserting side of a cable.
The invention has the following beneficial effects:
(1) The electric meter comprises the annular terminal and the insulating protective cover, wherein the insulating protective cover is connected to the bottom of the annular terminal, can play an insulating protection role on the bottom of the annular terminal, and can prevent an external conductor object from penetrating into a cable mounting hole to contact with the bottom of the annular terminal when the electric meter is exposed outdoors, so that electric shock accidents are avoided, potential safety hazards are eliminated, and the electric meter is in a safe state.
(2) The invention can realize automatic batch production, has high production efficiency, low production cost and better productivity.
(3) The invention can solve the quality problems of falling off caused by unstable connection of the insulating protective cover when the insulating protective cover is assembled with the annular terminal or falling off caused by breakage of a fixed column in the insulating protective cover due to overlarge screw torque force when the terminal is installed.
Drawings
FIG. 1 is a schematic diagram of a prior art electricity meter assembly test;
FIG. 2 is a schematic plan view of a prior art ammeter assembly test failure condition;
FIG. 3 is a schematic view showing the position of a ring terminal of a prior art electricity meter in a state of installing a cable;
fig. 4 is an assembly schematic diagram with the ammeter base housing and terminal box removed in embodiment 1 of the present invention;
FIG. 5 is a schematic plan view showing a successful assembly test state in embodiment 1 of the present invention;
FIG. 6 is an isometric schematic of embodiment 1 of the invention;
FIG. 7 is a schematic cross-sectional view of example 1 of the present invention;
fig. 8 is a schematic structural view of a ring terminal in embodiment 1 of the present invention;
fig. 9 is a schematic cross-sectional view of a ring terminal in embodiment 1 of the present invention;
FIG. 10 is a schematic view of embodiment 1 of the present invention at another angle;
FIG. 11 is a schematic exploded view of embodiment 2 of the present invention;
fig. 12 is a schematic structural view of embodiment 2 of the present invention;
FIG. 13 is a schematic cross-sectional view of embodiment 2 of the present invention;
fig. 14 is a bottom view of the shield of embodiment 2 of the present invention.
The drawings are marked:
the prior art part: the electric meter comprises a 1' electric meter, a 2' annular terminal, a 3' metal rod, a 4' electric meter shell base, a 5' lead-out sheet, a 6' terminal box and a 7' cable mounting hole.
The invention comprises the following steps: the cable comprises a ring-shaped terminal 1, an insulating protective cover 2, a metal rod 3, a long slot hole 4, a first through hole 5, a first circular arc 6, a second circular arc 7, a second through hole 8, a bottom slot hole 9, an electricity meter shell base 10, a lead-out sheet 11, a terminal box 12 and a cable mounting hole 13.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
Example 1:
referring to fig. 4 to 10, as an embodiment of the present invention, there is provided a terminal protection mechanism for an electricity meter, wherein the electricity meter includes a case base 10, and a terminal case 12, the terminal protection mechanism is provided in the terminal case 12 and is connected with a lead-out piece 11 of a relay, the terminal protection mechanism includes a ring terminal 1 and an insulation shield 2, the insulation shield 2 is connected to the bottom of the ring terminal 1 to form insulation protection for the bottom (including the bottom surface and the bottom side) of the ring terminal 1, in particular, the ring terminal 1 has a cable insertion side (arrow direction in fig. 5), the insulation shield 2 extends toward the cable insertion side so that the end of the insulation shield 2 protrudes from the bottom side of the ring terminal 1, a cable mounting hole 13 of the outer conductive object is prevented from being inserted into contact with the ring terminal 1, further, the insulation shield 2 extends at least on the cable insertion side to cover the bottom side of the ring terminal 1, and the other sides can be selectively protruded or extend upward according to actual needs so that the insulation shield 2 can play insulation protection for the bottom of the ring terminal 1, as shown in fig. 5, when the electricity meter is exposed outdoors, a metal rod 3 is a simulated cable 3 protrudes into the cable mounting hole 13, and the risk of electric shock is prevented from occurring if the inner contact with the ring terminal 1 is not normally due to the contact with the metal rod 3, the contact with the ring terminal is prevented from contacting the inner contact with the ring terminal 1, the inner conductive object is prevented from contacting the inner side of the ring terminal 1, the contact with the inner conductive object is prevented from contacting the inner side, and the contact risk is prevented from the inner contact with the metal rod is normally, eliminating potential safety hazard.
In the embodiment, the annular terminal 1 and the insulating protective cover 2 are integrally injection molded, so that the automatic batch production of the invention is realized, the production efficiency is higher, the production cost is low, and the product performance is better.
In this embodiment, the bottom of the ring terminal 1 is provided with a long slot hole 4 and a first through hole 5 which are mutually communicated, and when injection molding is performed, plastic can pass through the long slot hole 4, the first through hole 5 and finally solidify in the first through hole 5 to form a fixed column, so that the insulation protection cover 2 and the ring terminal 1 are integrally injection molded. As shown in fig. 6 to 7, the plastic completes the closed loop connection through the long slot holes 4 and the first through holes 5, and the fixed columns are formed in the first through holes 5, so that the insulation protection cover 2 is ensured not to fall off in the directions of the X axis and the Y axis, the adjacent first through holes 5 are communicated and fixed through the long slot holes 4, so that the insulation protection cover 2 is ensured not to fall off in the direction of the Z axis, and meanwhile, the insulation protection cover 2 and the annular terminal 1 are mutually positioned and do not autorotate through the arrangement of the plurality of first through holes 5.
In this embodiment, the long slot 4 is a racetrack slot, the first through holes 5 are circular holes, the plurality of circular holes are correspondingly arranged below the racetrack slot, the length of a single long slot 4 is greater than that of a single first through hole 5, and in a projection state (such as the projection in the Z-axis direction in fig. 10), all the first through holes 5 are located in a space range surrounded by the long slot 4, so that the stability is faster in the injection molding process, and the stability is higher. Of course, in other embodiments, a portion of the boundary of the first through hole 5 may overlap the space surrounded by the elongated slot 4. In addition, the first through hole 5 may be a through hole of another shape, such as a square hole.
In this embodiment, the ring terminal 1 is a metal piece, specifically, the ring terminal 1 is a stamped metal piece, and the insulating protective cover 2 is a plastic piece, so as to ensure an insulating effect.
Because the fixing process is an integral injection molding mode, and a triaxial fixing mode is mainly completed by utilizing the plurality of first through holes 5 of the plastic part and the long slot holes 4 of the metal part, multiple protection can be added to the fixing columns in the plurality of first through holes 5 while positioning is solved, deformation caused by extremely large locking force of the annular terminal 1 when an ammeter is subjected to irregular violent installation in an unknown field is avoided, and even if the fixing column in one of the first through holes 5 breaks, the whole insulation protection cover 2 still maintains a perfect protection function as long as one fixing column is perfect, and quality problems such as breaking, falling off and the like caused by overlarge screw torsion when the insulation protection cover 2 falls off and a terminal is installed are avoided during assembly.
Embodiment 2 for the sake of brevity, this embodiment describes only the portions different from embodiment 1:
because the ring terminal 1 in embodiment 1 is a stamped metal part, in the process of directly and integrally injection molding the ring terminal 1 and the insulating protective cover 2, as shown in fig. 10, natural molding process arcs such as a first arc 6, a second arc 7 and the like are formed at the bending part of the ring terminal 1, and the process arcs cannot control radians because of natural molding, so that a mold cannot be perfectly attached during integral injection molding, when the terminal protective mechanism is molded, plastic burrs or plastic burrs are formed at the first arc 6 and the second arc 7, and the terminal protective mechanism in such a situation cannot meet the high-requirement use environment. As shown in fig. 12 to 13, the plastic completes the closed loop connection through the long slot hole 4, the first through hole 5, the second through hole 8 and the bottom slot hole 9, and the fixed columns are formed by solidification in the first through hole 5 and the second through hole 8, so as to ensure that the insulation protection cover 2 does not fall off in the X-axis and Y-axis directions, the adjacent first through holes 5 are communicated and fixed through the long slot hole 4, the adjacent second through holes 8 are communicated and fixed through the bottom slot hole 9, so that the insulation protection cover 2 is ensured not to fall off in the Z-axis direction, and meanwhile, the insulation protection cover 2 and the ring terminal 1 are mutually positioned and do not rotate by arranging the plurality of first through holes 5 and the plurality of second through holes 8.
In this embodiment, the second through holes 8 and the bottom slot holes 9 are circular holes, the diameter of the bottom slot holes is larger than that of the second through holes, that is, the length of a single bottom slot hole 9 is larger than that of a single second through hole 8, and as shown in fig. 14, a plurality of second through holes 8 are correspondingly arranged above the bottom slot holes 9, and in a projection state, all the second through holes 8 are located in a space range surrounded by the bottom slot holes 9. Of course, in other embodiments, part of the boundary of the second through hole 8 may overlap the space surrounded by the bottom slot hole 9. In addition, the second through hole 8 and the bottom slot hole 9 may be other through holes, such as square holes.
Example 3:
referring to fig. 4 to 5, there is provided an electricity meter including an electricity meter case base 10, a relay, a terminal box 12, and a terminal protection mechanism for the electricity meter according to any of the above embodiments, the terminal protection mechanism being provided in the terminal box 12, the terminal protection mechanism including a ring terminal 1 and an insulation shield 2, an outgoing piece 11 of the relay being located in the ring terminal 1 with an insertion side of the outgoing piece 11 opposite to a cable insertion side. The ammeter has better protective performance, avoids electric shock accidents, and eliminates potential safety hazards.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A terminal protection machanism for ammeter, its characterized in that: the ring terminal comprises a ring terminal and an insulating protective cover, wherein the insulating protective cover is connected to the bottom of the ring terminal to form insulating protection on the bottom of the ring terminal.
2. The terminal guard mechanism for an electric meter of claim 1, wherein: the ring terminal has a cable insertion side, and the insulating boot extends toward the cable insertion side such that an end of the insulating boot protrudes from a bottom side surface of the ring terminal.
3. The terminal guard mechanism for an electric meter of claim 2, wherein: the insulating shield extends upwardly at least on the cable insertion side to cover the bottom side of the ring terminal.
4. The terminal guard mechanism for an electric meter of claim 1, wherein: the annular terminal and the insulating protective cover are integrally injection molded.
5. The terminal guard mechanism for an electric meter of claim 1, wherein: the annular terminal and the insulating protective cover are assembled and then integrally injection molded.
6. The terminal guard mechanism for an electric meter as set forth in claim 4, wherein: the bottom of the annular terminal is provided with a long slot hole and a first through hole which are mutually communicated, and when injection molding is carried out, plastics can be solidified into a fixed column through the long slot hole, the first through hole and finally in the first through hole, so that the insulation protective cover and the annular terminal are integrally injection molded.
7. The terminal guard mechanism for an electric meter of claim 5, wherein: the bottom of the annular terminal is provided with a long slot hole and a first through hole which are mutually communicated, the bottom of the insulating protective cover is also provided with a second through hole and a bottom slot hole which are mutually communicated, the second through holes and the first through holes are in one-to-one correspondence, and when injection molding is carried out, plastics can be solidified to form a fixed column through the long slot hole, the first through hole, the second through hole and the bottom slot hole and finally in the first through hole and the second through hole, so that the insulating protective cover and the annular terminal are integrally injection molded.
8. The terminal guard mechanism for an electric meter of claim 7, wherein: the second through holes and the bottom slot holes are circular holes, the diameter of the bottom slot holes is larger than that of the second through holes, the plurality of second through holes are correspondingly arranged above the bottom slot holes, and in a projection state, all the second through holes are located in the space range enclosed by the bottom slot holes.
9. The terminal guard mechanism for an electricity meter as claimed in claim 6 or 7 or 8, wherein: the long slot hole is a runway-shaped long hole, the first through hole is a circular hole, and the plurality of circular holes are correspondingly arranged below the runway-shaped long hole.
10. The terminal guard mechanism for an electric meter of claim 9, wherein: the length of the long slot hole is larger than that of a single first through hole, and in a projection state, all the first through holes are located in the space range enclosed by the long slot hole.
11. The terminal guard mechanism for an electric meter of claim 1, wherein: the annular terminal is a metal piece, and the insulating protective cover is a plastic piece.
12. An ammeter, characterized in that: the terminal protection mechanism for the ammeter comprises a base of the ammeter shell, a relay, a terminal box and the terminal protection mechanism for the ammeter, wherein the terminal protection mechanism is arranged in the terminal box and comprises an annular terminal and an insulating protective cover, a leading-out sheet of the relay is positioned in the annular terminal, and the inserting side of the leading-out sheet is opposite to the inserting side of a cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264785.8A CN116794365A (en) | 2022-03-17 | 2022-03-17 | Terminal protection mechanism for ammeter and ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264785.8A CN116794365A (en) | 2022-03-17 | 2022-03-17 | Terminal protection mechanism for ammeter and ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116794365A true CN116794365A (en) | 2023-09-22 |
Family
ID=88044867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210264785.8A Pending CN116794365A (en) | 2022-03-17 | 2022-03-17 | Terminal protection mechanism for ammeter and ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116794365A (en) |
-
2022
- 2022-03-17 CN CN202210264785.8A patent/CN116794365A/en active Pending
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