Electric energy meter LCD protection structure and use method thereof

Abstract

The invention relates to the field of electric power metering equipment, in particular to an electric energy meter LCD protection structure and a using method thereof.The electric energy meter LCD protection structure comprises a meter shell and a front cover, the front cover is detachably arranged on the front face of the meter shell, a cylinder frame forwards extending out of the front cover is rotationally arranged in the front cover, and an LCD screen is arranged on the front face of the cylinder frame; an adjusting mechanism for supporting the cylinder frame to drive the LCD screen to rotate is arranged at the bottom in the front cover; the front face of the front cover is provided with an installation hole allowing the cylinder frame to extend out, the inner side of the installation hole is provided with a sealing strip tightly attached to the outer wall of the cylinder frame, and the cylinder frame is of a cylindrical structure extending transversely. The electric energy meter has the beneficial effects that the rotatable barrel frame is arranged to serve as a screen support of the LCD screen, the pitching angle of the LCD screen can be changed according to the installation heights of different electric energy meters so as to adapt to the viewing position of personnel, and the visibility of the LCD screen is improved; and the protective plate with the sponge on the outer layer is arranged on the back surface of the cylinder frame, so that the LCD screen is rotated into the front cover in the transportation and installation processes, and the screen is prevented from being damaged by collision.

Description

Technical Field

[0001] The invention relates to the field of electric power metering equipment, and in particular to an electric energy meter LCD protection structure and a use method thereof. Background Art

[0002] The LCD screen is used to display various data of the energy meter, such as power consumption, voltage, current, power and other data. The energy meter usually uses a segmented LCD display (LCD segment screen), which is suitable for displaying numbers and simple symbols. However, the screen brightness of this type of energy meter LCD screen is usually low, and the visual range is narrow. When the energy meter is installed, it is affected by its installation position. The viewing angle of the LCD screen will cause unclear display when viewing. This is because the polarization plane of the light wave of the LCD screen is different at different viewing angles, resulting in poor brightness consistency and color distortion. In particular, to ensure the normal operation of the electricity meter, for example, for waterproof and anti-collision considerations, the electricity meter usually needs to be installed at a height of not less than 1.8 meters from the ground in the center. The installation position of the electricity meter in industrial sites is affected by obstacles, other equipment, circuit wiring, etc. The installation position is usually not flush with the personnel's perspective, resulting in poor visibility of the LCD screen. At the same time, the internal data cable of the electricity meter is not equipped with a storage structure, the lines are messy, and it is not convenient to install. In addition, the current electricity meter LCD screen has no protective structure on the outside, and the screen is easily damaged by bumps during transportation and installation, which has high requirements for packaging and transportation. Summary of the invention

[0003] The purpose of the present invention is to provide an LCD protection structure for an electric energy meter and a method of using the same in order to solve the above-mentioned problems. A rotatable tube frame is provided as a screen bracket for the LCD screen, and the pitch angle of the LCD screen can be changed according to the installation height of different electric energy meters to adapt to the viewing position of personnel and improve the visibility of the LCD screen; and an outer sponge protective plate is provided on the back of the tube frame, and the LCD screen is rotated to the inside of the front cover during transportation and installation to prevent the screen from being damaged by bumps, and after the LCD screen is reset, the heat insulation cover of the arc plate is used to isolate the internal heat of the electric energy meter, thereby achieving continuous protection of the LCD screen, as described below for details.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides an LCD protection structure for an electric energy meter, comprising a case and a front cover, wherein the front cover is detachably arranged on the front of the case, a cartridge frame extending forward from the front cover is rotatably arranged inside the front cover, an LCD screen is arranged on the front of the cartridge frame, and an adjustment mechanism supporting the cartridge frame to drive the LCD screen to rotate is arranged at the bottom of the front cover;

[0006] The front cover is provided with a mounting hole for accommodating the extension of the cartridge rack, and a sealing strip is provided on the inner side of the mounting hole and is close to the outer wall of the cartridge rack. The cartridge rack is a laterally extending cylindrical structure, and a front hole for accommodating the LCD screen is longitudinally penetrated on the front side of the cartridge rack, and side shafts are coaxially fixed at both ends of the cartridge rack to rotatably cooperate with the outer wall of the front cover.

[0007] Preferably, the front part of the watch case is provided with a positioning groove for accommodating the front cover, a fixing ear is provided at the front top corner of the positioning groove, and a screw threadedly matched with the fixing ear is passed through the front cover.

[0008] Preferably, a rotating ear supporting the rotation of the side shaft is provided on the inner side of the front cover, and large gears are fixed to the outside of the two groups of side shafts, a protective cover for accommodating the large gears is provided on the front side of the front cover, and pit-shaped operating parts for accommodating the passage of the adjustment mechanism are provided on both sides of the front cover below the side shaft.

[0009] Preferably, the adjustment mechanism includes a transmission rod that passes through the front cover and whose ends extend into the two groups of operating parts. A small gear that meshes with the large gear is fixed to the end of the transmission rod inside the front cover. Regular polygonal crimping grooves are provided at both ends of the transmission rod, and a knob is passed through the outside of one group of crimping grooves.

[0010] Preferably, a synchronization hole adapted to the crimping groove is penetrated in the middle of the knob, a screw hole is penetrated on the end face of the transmission rod, and the internal thread of the screw hole is matched with a locking bolt for tightening the knob and the transmission rod.

[0011] Preferably, a retaining frame is fixed to the bottom inner side of the front cover, and the retaining frame is a C-shaped frame with its opening facing upward. The transmission rod passes through the retaining frame transversely and rotates with the retaining frame. A guide cylinder is fixed inside the retaining frame and is coaxially sleeved on the outside of the transmission rod. The outside of the transmission rod inside the retaining frame is provided with an external thread.

[0012] Preferably, a slide groove extending along the length direction is vertically penetrated through the middle of the guide cylinder, and a slide sleeve threadedly engaged with the transmission rod is provided inside the guide cylinder. Slide blocks which slide transversely engaged with the slide groove are fixed to the upper and lower sides of the slide sleeve, and an adjustment ring is fixed to the bottom side of the slide block under the slide sleeve. A fixing card is provided on the front side of the bottom inner side of the retaining frame, and the fixing card is an elastic stainless steel buckle with an opening on the top, and a restraining ring is fixed to the bottom inner side of the retaining frame behind the fixing card.

[0013] Preferably, a data cable connected to the tube frame extends upward from the inner bottom of the front cover, and the data cable passes through the fixing card, the adjustment ring and the restraint ring in sequence, and the middle section of the data cable is clamped on the inner side of the retaining frame by the fixing card, an upper connector that plugs into and fits the tube frame is fixed to the top of the data cable, and the bottom end of the data cable extends downward into the interior of the watch case and is provided with a lower connector.

[0014] Preferably, an arc-shaped toothless section is provided on the top of the large gear, and a rear hole is longitudinally penetrated at the rear of the drum frame, baffles are fixed on the upper and lower sides of the drum frame inside the rear hole, and a protective plate is provided inside the rear hole to press against the baffle, the protective plate includes an inner heat insulation cover and an outer protective layer, the protective layer is sponge, and an adhesive tape that can be torn off and bonded to the protective plate is fixed on the baffle.

[0015] The method for using the electric energy meter LCD protection structure comprises the following steps:

[0016] a. When the electric energy meter is transported after production, keep the connector on the data line and the drum frame in a separated state, and rotate the knob to drive the transmission rod to rotate. The small gear on the transmission rod rotates to drive the large gear on the side shaft to rotate, and then drive the drum frame to drive the LCD screen to rotate, and rotate the LCD screen to the position inside the front cover. At the same time, the guard plate rotates with the drum frame to the installation hole on the front of the front cover, so that the guard plate faces outward and the LCD screen faces inward, so as to protect the LCD screen during transportation;

[0017] b. While rotating to the transport state, the toothless section of the large gear rotates downward to the position of the small gear. At this time, the large gear is separated from the small gear, thereby ensuring that the drum rack is in a free rotation state within the range of the toothless section, and adjusting the drum rack and guard plate in the locked state to the active state, so as to further enhance the protection capability of the outer guard plate of the drum rack when it is hit;

[0018] c. When the electric energy meter is installed and used, manually press the drum frame in the free-rotating state to offset the missing tooth segment from the small gear. At this time, the large gear and the small gear are meshed, and then turn the knob to rotate the drum frame to the state where the LCD screen faces forward and the guard plate faces backward. Adjust the pitch state of the LCD screen according to the installation position of the electric energy meter to meet the visibility of the electric energy meter when it is installed at different heights;

[0019] d. The excess part of the data cable is folded and stored through the fixing card, the adjustment ring and the constraint ring in sequence. When the LCD screen is rotated and raised upward by adjusting the barrel frame with the knob, the transmission rod is supported to rotate, and the external thread of the transmission rod is used to drive the sliding sleeve to translate toward the constraint ring under the guidance of the guide cylinder. The sliding sleeve drives the adjustment ring to approach the constraint ring to release the retracted part of the data cable by the adjustment ring, thereby meeting the need to pull the data cable when the LCD screen is raised upward by the barrel frame;

[0020] e. When the knob is rotated to adjust the barrel frame to support the LCD screen to rotate downward, the transmission rod drives the sliding sleeve to translate in the direction away from the constraint ring under the guidance of the guide cylinder. At this time, the sliding sleeve drives the adjustment ring to increase the distance between it and the constraint ring, and then the adjustment ring is used to straighten and retract the data cable that is loose when the barrel frame is rotated downward to be retracted, so that the storage length of the data cable and the pitch state of the LCD screen can be adjusted synchronously.

[0021] The beneficial effects are as follows: 1. The present invention can change the orientation of the LCD screen according to the height position of the electric energy meter installation by setting a pitch-rotatable cylinder frame as the support structure of the LCD screen, so as to facilitate the subsequent observation of the electric energy meter reading, and can use the LCD screen to be installed downward to avoid rainwater adhering to the screen when installed outdoors, without the need to set up additional rain shielding components;

[0022] 2. A retaining frame and a sliding sleeve are provided to cooperate with a fixing card, an adjusting ring and a restraining ring to fold and store the excess part of the data line, so as to avoid the data line being too long and affecting the installation, debugging and operation convenience of the internal structure of the electric energy meter;

[0023] 3. The storage length of the data cable is adjusted synchronously with the pitch state of the LCD screen. When the LCD screen is lifted upward, the distance between the adjustment ring and the constraint ring is shortened, and the storage section of the data cable is released synchronously to avoid the data cable free section being insufficient when the barrel frame supports the LCD screen to lift upward, which may cause the data connector to loosen;

[0024] 4. When the LCD screen rotates downward, the distance between the adjustment ring and the constraint ring is increased synchronously, so that the data cable is automatically straightened and retracted when the free section of the data cable changes from straightening to looseness, so as to avoid the excess part of the data cable affecting the rotation and adjustment of the drum frame;

[0025] 5. In addition, the LCD screen of the electric energy meter can be rotated and retracted into the front cover to realize the transportation mode, so as to realize the built-in protection of the LCD screen during transportation, improve the problem that the LCD screen is easily damaged by squeezing during transportation, and reduce the transportation packaging cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a main structural diagram of the present invention;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 3 It is a schematic diagram of the structural decomposition of the present invention;

[0030] Figure 4 It is a three-dimensional structural schematic diagram of the front cover of the present invention;

[0031] Figure 5 It is a three-dimensional structural schematic diagram of the cartridge holder of the present invention;

[0032] Figure 6 It is a three-dimensional structural schematic diagram of the adjustment mechanism of the present invention;

[0033] Figure 7 is a schematic diagram of the three-dimensional structure of the cage of the present invention in another direction;

[0034] Figure 8 It is a schematic diagram of the structure disassembly of the cage of the present invention in another direction;

[0035] Fig. 9 It is a schematic diagram of the structural disassembly of the front cover and the cartridge holder in another direction of the present invention;

[0036] Fig.10 It is a schematic diagram of the three-dimensional structure of the LCD screen of the present invention in an upward state;

[0037] Fig.11 It is a schematic diagram of the three-dimensional structure of the LCD screen of the present invention in a folded state.

[0038] The following are the descriptions of the reference numerals:

[0039] 1. Watch case; 101. Positioning slot; 102. Fixing ear; 2. Front cover; 201. Mounting hole; 202. Rotating ear; 203. Protective cover; 204. Operating part; 205. Wiring hole; 206. Sealing strip; 3. Cylinder rack; 301. Front hole; 301a. Locking hole; 302. Side shaft; 303. Big gear; 303a. Toothless section; 304. Back hole; 305. Baffle; 306. Adhesive tape; 4. LCD screen; 401. Locking rack; 5. Adjustment mechanism; 501 , transmission rod; 502, pinion; 503, crimping groove; 503a, screw hole; 504, knob; 504a, synchronization hole; 505, locking bolt; 6, wiring cover; 601, cover hole; 7, retaining frame; 8, guide cylinder; 801, slide groove; 9, data line; 901, upper connector; 902, lower connector; 10, sliding sleeve; 10a, slider; 11, fixing card; 12, adjusting ring; 13, restraining ring; 14, guard plate; 14a, heat insulation cover; 14b, protective layer. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0041] See also Figure 1-Figure 11 As shown, the present invention provides an LCD protection structure for an electric energy meter, comprising a case 1 and a front cover 2, wherein the front cover 2 is detachably arranged on the front face of the case 1, a cartridge frame 3 extending forward from the front cover 2 is rotatably arranged inside the front cover 2, an LCD screen 4 is arranged on the front face of the cartridge frame 3, and an adjustment mechanism 5 for supporting the cartridge frame 3 to drive the LCD screen 4 to rotate is arranged at the bottom of the front cover 2, the cartridge frame 3 is used to support the LCD screen 4 to extend out of the front cover 2, and at the same time, the pitch rotation adjustment of the LCD screen 4 is realized, so that the viewing angle can be adjusted accordingly when the case 1 is installed at different heights;

[0042] A mounting hole 201 for accommodating the extension of the cartridge holder 3 is provided on the front side of the front cover 2, and a sealing strip 206 close to the outer wall of the cartridge holder 3 is provided on the inner side of the mounting hole 201, thereby improving the sealing effect of the cartridge holder 3 extending out of the front cover 2. The cartridge holder 3 is a laterally extending cylindrical structure, and a front hole 301 for accommodating the LCD screen 4 is longitudinally penetrated on the front side of the cartridge holder 3, and locking holes 301a are provided at the four corners of the front hole 301, a locking holder 401 is fixed on the outer side of the LCD screen 4, and a screw threadedly matched with the locking hole 301a is passed through the middle of the locking holder 401 to realize the locking connection between the LCD screen 4 and the cartridge holder 3, and side shafts 302 rotatably matched with the outer wall of the front cover 2 are coaxially fixed to both ends of the cartridge holder 3.

[0043] As an optional embodiment, the front part of the watch case 1 is provided with a positioning groove 101 for accommodating the front cover 2, and a fixing ear 102 is provided at the front top corner of the positioning groove 101. The front cover 2 is provided with a screw threaded with the fixing ear 102 to achieve a fixed connection between the watch case 1 and the front cover 2. A wiring hole 205 is longitudinally penetrated on the front cover 2 below the cartridge holder 3, and a wiring cover 6 is buckled on the outside of the wiring hole 205. Both ends of the wiring cover 6 are provided with covering holes 601 for penetrating screws to connect the front cover 2;

[0044] The inner side of the front cover 2 is provided with a rotating ear 202 for supporting the rotation of the side shaft 302, and large gears 303 are fixed on the outside of the two groups of side shafts 302. A shield 203 for accommodating the large gear 303 is provided on the front side of the front cover 2. Both sides of the front cover 2 below the side shaft 302 are provided with a pit-shaped operating part 204 for accommodating the adjustment mechanism 5 to pass through. The adjustment mechanism 5 includes a transmission rod 501 that penetrates the front cover 2 and the ends of which extend into the two groups of operating parts 204. A small gear 502 that meshes with the large gear 303 is fixed on the end of the transmission rod 501 inside the front cover 2 to ensure that when the transmission rod 501 is rotated, the engagement of the small gear 502 and the large gear 303 can be utilized to drive the drum frame 3 to rotate. The small gear 502 drives the large gear 303 to rotate, so as to provide a more accurate rotation angle adjustment capability of the drum frame 3. Regular polygonal pressing grooves 503 are provided on both ends of the transmission rod 501, and a knob 504 is penetrated on the outside of one group of pressing grooves 503.

[0045] Specifically, a synchronous hole 504a adapted to the crimping groove 503 is passed through the middle of the knob 504, a screw hole 503a is passed through the end surface of the transmission rod 501, and a locking bolt 505 for pressing the knob 504 and the transmission rod 501 is matched with the internal thread of the screw hole 503a. The locking bolt 505 is used to press the knob 504 to one end of the transmission rod 501, and the synchronous hole 504a is matched with the crimping groove 503 to realize the synchronous rotation of the knob 504 and the transmission rod 501, so that the knob 504 can be operated conveniently to realize the rotation of the transmission rod 501, so as to change the supporting angle of the barrel frame 3 to the LCD screen 4. At the same time, according to the installation position of the watch case 1 and actual needs, the knob 504 is adjusted to be adapted and installed at both ends of the transmission rod 501 to meet different usage requirements.

[0046] A holder 7 is fixed to the bottom of the front cover 2. The holder 7 is a C-shaped frame with an opening facing upward. The transmission rod 501 passes through the holder 7 horizontally and rotates with the holder 7. A guide cylinder 8 is fixed inside the holder 7 and is coaxially sleeved on the outside of the transmission rod 501 to ensure that the guide cylinder 8 does not rotate. The transmission rod 501 inside the holder 7 is provided with an external thread on the outside. A slide groove 801 extending along its length direction is vertically penetrated in the middle of the guide cylinder 8. A sliding sleeve 10 threadedly matched with the transmission rod 501 is sleeved inside the guide cylinder 8. Slide blocks 10a that slide horizontally and match the slide groove 801 are fixed on the upper and lower sides of the sliding sleeve 10. , ensuring that the external thread can be used to drive the sliding sleeve 10 to move horizontally under the guidance of the guide cylinder 8 during the rotation of the transmission rod 501, a data line 9 connected to the cylinder frame 3 is extended upward from the bottom of the front cover 2, an adjusting ring 12 is fixed to the bottom side of the slider 10a below the sliding sleeve 10, and a fixing card 11 is arranged on the front of the bottom of the retaining frame 7. The fixing card 11 is an elastic stainless steel buckle with an opening on the top, ensuring that the fixing card 11 can clamp the middle section of the data line 9 and place it in the position of the fixing card 11, and a restraining ring 13 is fixed to the bottom of the retaining frame 7 behind the fixing card 11, and the inner diameters of the restraining ring 13 and the adjusting ring 12 are both larger than the diameter of the data line 9;

[0047] The data line 9 passes through the fixing card 11, the adjusting ring 12 and the restraining ring 13 in sequence, and the middle section of the data line 9 is clamped on the inner side of the retaining frame 7 by the fixing card 11. A socket (not shown in the figure) is provided at the rear position of the bottom of the cartridge frame 3. An upper connector 901 which is plugged into and matched with the socket on the cartridge frame 3 is fixed on the top of the data line 9 to realize the detachable connection between the data line 9 and the cartridge frame 3. The bottom end of the data line 9 extends downward into the interior of the meter case 1 and is provided with a lower connector 902, which is connected to the internal circuit board of the electric energy meter.

[0048] An arc-shaped toothless section 303a is provided on the top of the large gear 303. When the toothless section 303a of the large gear 303 rotates to the downward position, the meshing state between the small gear 502 and the large gear 303 is released. At this time, the cartridge rack 3 can rotate freely within the range of the toothless section 303a. With this arrangement, the LCD screen 4 can be rotated and stored in the front cover 2 as a transportation mode to provide protection. A rear hole 304 is longitudinally penetrated at the rear of the cartridge rack 3. Baffles 305 are fixed on the upper and lower sides of the cartridge rack 3 inside the rear hole 304. A guard plate 14 that is tightly pressed against the baffle 305 is provided inside the rear hole 304. The guard plate 14 includes an inner heat insulation cover 14a and an outer protective layer 14b. The protective layer 14b is a sponge. An adhesive tape 306 that can be torn off the adhesive guard plate 14 is fixed on the baffle 305, so as to facilitate the installation and removal of the guard plate 14 on the cartridge rack 3.

[0049] The method for using the LCD protection structure of the electric energy meter includes the following steps:

[0050] a. When the electric energy meter is transported after production, keep the connector 901 on the data line 9 and the drum frame 3 in a separated state, and rotate the knob 504 to drive the transmission rod 501 to rotate, and use the small gear 502 on the transmission rod 501 to rotate to drive the large gear 303 of the side shaft 302 to rotate, thereby driving the drum frame 3 to drive the LCD screen 4 to rotate, and rotate the LCD screen 4 to the position inside the front cover 2. At the same time, the guard plate 14 follows the drum frame 3 to rotate into the mounting hole 201 on the front of the front cover 2, so that the guard plate 14 faces outward and the LCD screen 4 faces inward, so as to protect the LCD screen 4 during transportation (such as Fig.11 shown);

[0051] b. While rotating to the transport state, the toothless section 303a of the large gear 303 rotates downward to the position of the small gear 502. At this time, the large gear 303 is separated from the small gear 502, thereby ensuring that the drum rack 3 is in a free rotation state within the range of the toothless section 303a, and the drum rack 3 and the guard plate 14 in the locked state are adjusted to the active state, so as to further enhance the protection capability of the outer guard plate 14 of the drum rack 3 when it is hit;

[0052] c. When the electric energy meter is installed and used, the drum frame 3 in the free rotation state is manually pressed to stagger the toothless segment 303a with the small gear 502. At this time, the large gear 303 is meshed with the small gear 502, and then the knob 504 is turned to rotate the drum frame 3 to a state where the LCD screen 4 faces forward and the guard plate 14 faces backward, and the pitch state of the LCD screen 4 is adjusted according to the installation position of the electric energy meter, thereby meeting the visibility of the electric energy meter when it is installed at different heights;

[0053] d. The excess part of the data cable 9 is folded and stored through the fixing card 11, the adjusting ring 12 and the restraining ring 13 in sequence. When the barrel frame 3 is adjusted by the knob 504 to support the LCD screen 4 to rotate upward and lift up, the knob 504 supports the transmission rod 501 to rotate, and the external thread of the transmission rod 501 drives the sliding sleeve 10 to translate toward the restraining ring 13 under the guidance of the guide cylinder 8. The sliding sleeve 10 drives the adjusting ring 12 to approach the restraining ring 13, so as to release the retracted part of the data cable 9 by the adjusting ring 12, thereby meeting the pulling need of the data cable 9 in the process of supporting the LCD screen 4 to lift upward by the barrel frame 3 (such as Fig.10 shown);

[0054] e. When the rotary knob 504 is turned to adjust the barrel frame 3 to support the LCD screen 4 to rotate downward, the transmission rod 501 drives the sleeve 10 to translate in a direction away from the constraint ring 13 under the guidance of the guide cylinder 8. At this time, the sleeve 10 drives the adjustment ring 12 to increase the distance between it and the constraint ring 13, and then the adjustment ring 12 is used to straighten and retract the data cable 9 that is in a loose state when the barrel frame 3 is rotated downward and retracted, thereby achieving synchronous adjustment of the storage length of the data cable 9 and the pitch state of the LCD screen 4.

[0055] The present invention provides a cylinder frame 3 that can be pitched and rotated as a supporting structure for the LCD screen 4, and can change the direction of the LCD screen 4 according to the height position of the electric energy meter installation, so as to facilitate the subsequent observation of the electric energy meter reading, and can use the LCD screen 4 to be installed downward to avoid rainwater adhering to the screen when installed outdoors, without the need to provide an additional rain shielding component;

[0056] A retaining frame 7 and a sliding sleeve 10 are provided to cooperate with a fixing card 11, an adjusting ring 12 and a restraining ring 13 to fold and store the excess part of the data line 9, so as to prevent the data line 9 from being too long and affecting the installation, debugging and operation convenience of the internal structure of the electric energy meter;

[0057] The storage length of the data cable 9 is adjusted synchronously with the pitch state of the LCD screen 4. When the LCD screen 4 is lifted upward, the distance between the adjustment ring 12 and the restraint ring 13 is shortened, and the storage section of the data cable 9 is released synchronously to avoid the data connector being loosened due to the insufficient length of the free section of the data cable 9 when the barrel frame 3 supports the LCD screen 4 to lift upward.

[0058] At the same time, when the LCD screen 4 rotates downward, the distance between the adjustment ring 12 and the constraint ring 13 is synchronously increased, so that the data cable 9 is automatically straightened and retracted when the free section of the data cable 9 changes from being straightened to being loose, so as to prevent the excess part of the data cable 9 from affecting the rotation adjustment action of the drum frame 3;

[0059] In addition, the LCD screen 4 of the electric energy meter can be rotated and retracted into the front cover 2 to realize the transportation mode, so as to realize the built-in protection of the LCD screen 4 during transportation, improve the problem that the LCD screen 4 is easily damaged by squeezing during transportation, and reduce the transportation packaging cost.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electric energy meter LCD protection structure, comprising a meter case (1) and a front cover (2), wherein the front cover (2) is detachably arranged on the front of the meter case (1), characterized in that: A cartridge holder (3) is rotatably arranged inside the front cover (2) and extends forward from the front cover (2); an LCD screen (4) is arranged on the front of the cartridge holder (3); and an adjustment mechanism (5) is arranged at the bottom of the front cover (2) to support the cartridge holder (3) and drive the LCD screen (4) to rotate. The front cover (2) is provided with a mounting hole (201) on the front side for accommodating the extension of the cartridge holder (3), and a sealing strip (206) is provided on the inner side of the mounting hole (201) for tightly contacting the outer wall of the cartridge holder (3). The cartridge holder (3) is a cylindrical structure extending transversely, and a front hole (301) for accommodating the LCD screen (4) is longitudinally penetrated on the front side of the cartridge holder (3), and side shafts (302) are coaxially fixed at both ends of the cartridge holder (3) for rotationally matching the outer wall of the front cover (2).

2. The LCD protection structure of an electric energy meter according to claim 1, characterized in that: The front part of the watch case (1) is provided with a positioning groove (101) for accommodating the front cover (2), a fixing ear (102) is provided at the front top corner of the positioning groove (101), and a screw threadedly matched with the fixing ear (102) is passed through the front cover (2).

3. The LCD protection structure of an electric energy meter according to claim 1, characterized in that: The inner side of the front cover (2) is provided with a rotating ear (202) for supporting the rotation of the side shaft (302), and large gears (303) are fixed to the outside of the two sets of side shafts (302). The front side of the front cover (2) is provided with a protective cover (203) for accommodating the large gear (303), and both sides of the front cover (2) below the side shaft (302) are provided with a pit-shaped operating portion (204) for accommodating the adjustment mechanism (5) to pass through.

4. The LCD protection structure of an electric energy meter according to claim 3, characterized in that: The adjustment mechanism (5) comprises a transmission rod (501) that passes through the front cover (2) and whose ends extend into the two groups of operating parts (204); a small gear (502) that meshes with the large gear (303) is fixed to the end of the transmission rod (501) inside the front cover (2); regular polygonal crimping grooves (503) are provided at both ends of the transmission rod (501); a knob (504) is provided on the outside of one group of crimping grooves (503).

5. The LCD protection structure of an electric energy meter according to claim 4, characterized in that: The knob (504) has a synchronization hole (504a) in the middle thereof adapted to the crimping groove (503), the end surface of the transmission rod (501) has a screw hole (503a) in the end surface thereof, and the screw hole (503a) has a locking bolt (505) threadedly fitted inside the screw hole (503a) for pressing the knob (504) and the transmission rod (501) together.

6. The LCD protection structure of an electric energy meter according to claim 5, characterized in that: A retaining frame (7) is fixed to the bottom of the front cover (2), the retaining frame (7) is a C-shaped frame with an opening facing upwards, the transmission rod (501) passes through the retaining frame (7) transversely and is rotatably matched with the retaining frame (7), and a guide cylinder (8) is fixed inside the retaining frame (7) and is coaxially sleeved on the outside of the transmission rod (501), and an external thread is arranged on the outside of the transmission rod (501) inside the retaining frame (7).

7. The LCD protection structure of an electric energy meter according to claim 6, characterized in that: A slide groove (801) extending along the length direction is vertically penetrated through the middle of the guide cylinder (8); a slide sleeve (10) threadedly matched with the transmission rod (501) is sleeved inside the guide cylinder (8); sliders (10a) that slide and match the slide groove (801) are fixed on the upper and lower sides of the slide sleeve (10); an adjustment ring (12) is fixed on the bottom side of the slider (10a) below the slide sleeve (10); a fixing card (11) is provided on the front side of the bottom of the retaining frame (7); the fixing card (11) is an elastic stainless steel buckle with an opening on the top, and a restraining ring (13) is fixed to the bottom of the retaining frame (7) behind the fixing card (11).

8. The LCD protection structure of an electric energy meter according to claim 7, characterized in that: A data line (9) connected to the cartridge frame (3) extends upward from the inner bottom of the front cover (2); the data line (9) passes through the fixing card (11), the adjusting ring (12) and the restraining ring (13) in sequence, and the middle section of the data line (9) is clamped to the inner side of the retaining frame (7) through the fixing card (11); an upper connector (901) that is plugged into the cartridge frame (3) is fixed to the top of the data line (9); and the bottom end of the data line (9) extends downward into the interior of the watch case (1) and is provided with a lower connector (902).

9. The LCD protection structure of an electric energy meter according to claim 8, characterized in that: An arc-shaped toothless section (303a) is provided at the top of the large gear (303), and a rear hole (304) is longitudinally penetrated at the rear of the cartridge rack (3), baffles (305) are fixed on the upper and lower sides of the cartridge rack (3) inside the rear hole (304), and a protective plate (14) is provided inside the rear hole (304) and is pressed against the baffle (305), and the protective plate (14) includes an inner heat insulation cover (14a) and an outer protective layer (14b), and the protective layer (14b) is sponge, and an adhesive tape (306) that can be torn off and bonded to the protective plate (14) is fixed on the baffle (305).

10. The method for using the LCD protection structure of an electric energy meter according to any one of claims 1 to 9, characterized in that: The following steps are involved: a. When the electric energy meter is transported after production is completed, the connector (901) on the data line (9) is kept separated from the cartridge frame (3), and the knob (504) is rotated to drive the transmission rod (501) to rotate, and the small gear (502) on the transmission rod (501) is rotated to drive the large gear (303) on the side shaft (302) to rotate, thereby driving the cartridge frame (3) to drive the LCD screen (4) to rotate, and the LCD screen (4) is rotated to a position inside the front cover (2), and at the same time, the guard plate (14) follows the cartridge frame (3) to rotate into the mounting hole (201) on the front of the front cover (2), so that the guard plate (14) faces outward and the LCD screen (4) faces inward, so that the LCD screen (4) is protected during transportation; b. While rotating to the transport state, the toothless section (303a) of the large gear (303) rotates downward to the position of the small gear (502), and the large gear (303) is separated from the small gear (502), thereby ensuring that the cartridge rack (3) is in a free rotation state within the range of the toothless section (303a), and adjusting the cartridge rack (3) and the guard plate (14) in the locked state to an active state, so as to further enhance the protection capability of the outer guard plate (14) of the cartridge rack (3) when it is hit; c. When the electric energy meter is installed and used, the drum frame (3) in a freely rotating state is manually pressed to offset the missing tooth segment (303a) from the small gear (502). At this time, the large gear (303) is meshed with the small gear (502). Then, the knob (504) is turned to rotate the drum frame (3) to a state where the LCD screen (4) faces forward and the guard plate (14) faces backward. The pitch state of the LCD screen (4) is adjusted according to the installation position of the electric energy meter, thereby satisfying the visibility of the electric energy meter when it is installed at different heights. d. The excess part of the data cable (9) is folded and stored in sequence through the fixing card (11), the adjusting ring (12) and the restraining ring (13). When the barrel frame (3) is adjusted by the knob (504) to support the LCD screen (4) to rotate upward and lift up, the knob (504) supports the transmission rod (501) to rotate, and the external thread of the transmission rod (501) is used to drive the sliding sleeve (10) to move in a direction close to the restraining ring (13) under the guidance of the guide cylinder (8). The sliding sleeve (10) drives the adjusting ring (12) to approach the restraining ring (13) to release the retracted part of the data cable (9) by the adjusting ring (12), thereby meeting the pulling requirement of the data cable (9) in the process of the barrel frame (3) supporting the LCD screen (4) to lift up; e. When the knob (504) is rotated to adjust the cartridge frame (3) to support the LCD screen (4) to rotate downward, the transmission rod (501) drives the sliding sleeve (10) to translate in a direction away from the restraining ring (13) under the guidance of the guide cylinder (8). At this time, the sliding sleeve (10) drives the adjusting ring (12) to increase the distance between the sliding sleeve (10) and the restraining ring (13). Then, the adjusting ring (12) is used to straighten and retract the data cable (9) that is in a loose state when the cartridge frame (3) is rotated downward and retracted, thereby achieving synchronous adjustment of the storage length of the data cable (9) and the pitch state of the LCD screen (4).

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