Anti-prying electric energy meter

Abstract

The utility model discloses an anti-prying electric energy meter, which comprises a base, a cover body and a circuit module, the periphery of the base is connected with the cover body, and the circuit module is arranged in an installation area formed by the base and the cover body. A connecting part for fixedly connecting the base and the cover body is arranged between the joint surfaces of the base and the cover body, and a barrier strip is arranged on the periphery of each joint surface; the periphery of the base is connected with the cover body, the connecting portion is arranged between the joint faces of the connecting positions, the connecting portion is arranged between the base and the cover body, the outer side of the connecting portion is blocked through the blocking strip, a tool cannot make contact with the plane where the connecting portion is located, and therefore the tool cannot directly enable the connecting portion to be pried open due to stress.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-prying of electric energy meters, in particular to an anti-prying electric energy meter. Background Art

[0002] An electric energy meter is an instrument used to measure electrical energy, also known as an watt-hour meter, a fire meter, or a kilowatt-hour meter. It refers to an instrument that measures various electrical quantities. Currently, electric energy meters are becoming increasingly common in industrial production and life due to their small size, high accuracy, good reliability, and easy installation.

[0003] Current electricity meters, such as the Chinese utility model patent "A Single-Phase Electronic Electricity Meter Structure" with authorization announcement number CN207458445U, include a base, a meter cover, an upper terminal cover, and a lower terminal cover. The meter cover is provided with screw holes, through which the meter cover is fixed to the base, and the top entrance of the screw hole is sealed with a press-type sealing nail for primary sealing. The upper terminal cover and the meter cover are fixedly connected by a second clip, and the lower terminal cover and the meter cover are fixedly connected by a third clip. A lead-type seal is used to form a secondary seal between the lower terminal cover and the meter cover. The meter is easy to pry open with a tool because the gap between the meter cover and the base is linear, and can be pried open by inserting a tool into the gap. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-prying electric energy meter, which solves the problem that the electric energy meter in the prior art is easily pried open.

[0005] The present invention is achieved in this way. A pry-proof electric energy meter includes a base, a cover and a circuit module. The outer periphery of the base is connected to the cover. The circuit module is placed in an installation area formed by the base and the cover. It is characterized in that a connecting portion for fixing the base and the cover is provided between the joint surfaces where the base and the cover are connected, and a ring-shaped closed baffle is provided on the outer periphery of the joint surface.

[0006] When assembling the electricity meter, the circuit module is installed on the base, and then the cover is covered on the outside of the circuit module and connected to the outer periphery of the base. The circuit module is in a sealed installation area; in order to prevent the connection between the cover and the base of the electricity meter from being pried open, the cover and the base are ultrasonically welded, and there is a gap on the outer periphery of the welding for tools to pass through, and the cover and the base can still be pried open. Therefore, the risk of existing electricity meters being pried open is relatively high; to address this technical problem, the outer periphery of the base of the present application is connected to the cover, and there is a connecting part between the joint surfaces of the connection. The connecting part is between the base and the cover, and the outer side of the connecting part is blocked by a baffle, and the tool cannot contact the plane where the connecting part is located. Therefore, the tool cannot directly cause the connecting part to be pried open by force.

[0007] A further technical solution of the present invention is that the baffle is integrally formed with the base, and the joint surface between the baffle and the base is perpendicular.

[0008] The retaining bar is integrally formed with the base, which has higher structural strength and further reduces the possibility of the electricity meter being pried open by tools. In addition, the retaining bar is perpendicular to the joint surface of the base, and the connecting part is wrapped on the joint surface. When using tools, the retaining bar cannot directly contact the plane where the connecting part is located and bear force, which greatly reduces the possibility of the electricity meter being pried open.

[0009] A further technical solution of the present invention is that the connection between the base and the cover is an outward protrusion.

[0010] The connection between the base and the cover is an outward protrusion, which facilitates the subsequent ultrasonic welding without interference from the base and the cover.

[0011] The joint surface of the base and the joint surface of the cover are on the raised portion.

[0012] A further technical solution of the present utility model is: it is characterized in that the connecting portion includes an annular groove arranged on the base joint surface, the annular groove extends along the circumference of the base joint surface, and an ultrasonic welding strip that is plugged into the annular groove is provided on the joint surface of the cover body, and the ultrasonic welding strip is ultrasonically welded in the annular groove for fixed connection between the cover body and the base.

[0013] During ultrasonic welding, the ultrasonic welding bar is connected to the annular groove, so that the cover body and the outer periphery of the base are fixed. At this time, the connection is a closed annular structure, and the outside is blocked by the blocking bar, making the connection between the cover body and the base not easy to be pried open.

[0014] A further technical solution of the present invention is that an absorption groove for absorbing ultrasonic welding energy is provided on a surface opposite to the joint surface of the cover.

[0015] The welding is performed on the cover body. In order to avoid damage to the cover body during the welding process, an absorption groove is provided on the cover body. The absorption groove can effectively absorb the energy generated during the ultrasonic welding process.

[0016] A further technical solution of the present invention is that the absorption groove is close to the corner of the cover body.

[0017] The absorption groove is set at the corner of the cover body. If the cover body is pried open, the cover body will break from the absorption groove, so that the cover body cannot be restored and cannot be installed with the base, and it is easy to discover that the electric energy meter has been pried open.

[0018] A further technical solution of the present invention is: a barb is provided on the inner side of the base, and a limiting groove cooperating with the barb is provided on the cover body, and the barb is snapped into the limiting groove to form a self-locking structure between the base and the cover body.

[0019] The barb is inserted into the limit groove when the base and the cover are in place up and down; under the primary anti-pry structure formed by the connecting part and the baffle, the barb and the limit groove of the self-locking structure constitute a secondary anti-pry structure when the primary anti-pry structure is destroyed, thereby further ensuring the anti-pry effect.

[0020] A further technical solution of the present invention is: a slot is provided on the outer periphery of the cover, the joint surface of the cover is located outside the slot, the limiting groove is located inside the slot, and a protrusion is provided on the base to be plugged into the slot.

[0021] Improve the firmness of installation and reduce the impact of ultrasonic welding on the overall cover.

[0022] The beneficial effects of the present invention are as follows: when assembling the electric energy meter, the circuit module is installed on the base, and then the cover is covered on the outside of the circuit module and connected to the outer periphery of the base, and the circuit module is in a sealed installation area; in order to prevent the connection between the cover and the base of the electric energy meter from being pried open, the cover and the base are ultrasonically welded, and there is a gap on the outer periphery of the welding for tools to pass through, and the cover and the base can still be pried open, so the risk of existing electric energy meters being pried open is relatively high; in response to this technical problem, the outer periphery of the base of the present application is connected to the cover, and there is a connecting part between the joint surfaces of the connection, the connecting part is between the base and the cover, and the outer side of the connecting part is blocked by a baffle, and the tool cannot contact the plane where the connecting part is located, so the tool cannot directly cause the connecting part to be pried open by force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a pry-proof electric energy meter provided by the utility model;

[0024] Figure 2 This is an enlarged view of point A provided by the present utility model;

[0025] Figure 3 This is a cross-sectional view of a pry-proof electric energy meter provided by the utility model;

[0026] Figure 4 This is an enlarged view of point B provided by the present utility model;

[0027] Figure 5 This is a cross-sectional view from another perspective of a pry-proof electric energy meter provided by the utility model.

[0028] Reference numerals: 1. Base, 11. Barb, 12. Limiting groove,

[0029] 2. Cover, 21. Slot, 22. Top cover, 23. End cover,

[0030] 3. Connecting part, 31. Annular groove, 32. Ultrasonic welding strip,

[0031] 4. Baffle, 5. Circuit module, 6. Absorption groove, 7. Joint surface, 8. Raised part. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0034] Example 1:

[0035] Figure 1-5 A pry-proof electric energy meter is shown, comprising a base 1, a cover 2 and a circuit module 5. The outer periphery of the base 1 is connected to the cover 2, and the circuit module 5 is placed in the installation area formed by the base 1 and the cover 2. It is characterized in that a connecting portion 3 for fixing the base 1 and the cover 2 is provided between the joint surface 7 connecting the base 1 and the cover 2, and a ring-shaped closed baffle 4 is provided on the outer periphery of the joint surface 7.

[0036] In this embodiment, the baffle 4 is integrally formed with the base 1 , and the baffle 4 is perpendicular to the joint surface 7 of the base 1 .

[0037] The retaining bar is integrally formed with the base, which has higher structural strength and further reduces the possibility of the electricity meter being pried open by tools. Moreover, the retaining bar is perpendicular to the joint surface 7 of the base, and the connecting part is wrapped on the joint surface 7. When using tools, the retaining bar cannot directly contact the plane where the connecting part is located and bear force, which greatly reduces the possibility of the electricity meter being pried open.

[0038] In this embodiment, a groove with an opening toward the cover body is provided on the base, and the outer periphery of the groove is a baffle; a welding groove for ultrasonic welding and an installation groove for installing a sealing strip are provided in the groove.

[0039] In this embodiment, the connection between the base 1 and the cover 2 is an outward protrusion 8 .

[0040] The connection between the base and the cover is an outward protrusion 8, which facilitates subsequent ultrasonic welding without interference from the base and the cover.

[0041] The joint surface 7 of the base and the joint surface 7 of the cover are on the raised portion 8 .

[0042] In this embodiment, an outward protrusion is provided on the outer periphery of the bottom of the cover body, and an outward protrusion is also provided on the top of the base. When the cover body and the base are connected in a vertical manner, the two protrusions form a raised portion 8.

[0043] In this embodiment, the connecting portion 3 includes an annular groove 31 arranged on the mating surface 7 of the base 1, and the annular groove 31 extends circumferentially along the mating surface 7 of the base 1. An ultrasonic welding strip 32 is provided on the mating surface 7 of the cover body 2, which is plugged into the annular groove 31. The ultrasonic welding strip 32 is ultrasonically welded in the annular groove 31 for fixed connection between the cover body 2 and the base 1.

[0044] During ultrasonic welding, the ultrasonic welding bar is connected to the annular groove, so that the cover body and the outer periphery of the base are fixed. At this time, the connection is a closed annular structure, and the outside is blocked by the blocking bar, making the connection between the cover body and the base not easy to be pried open.

[0045] In this embodiment, an absorption groove 6 for absorbing ultrasonic welding energy is provided on the surface of the cover body 2 which is away from the joint surface 7 .

[0046] The welding is performed on the cover body. In order to avoid damage to the cover body during the welding process, an absorption groove is provided on the cover body. The absorption groove can effectively absorb the energy generated during the ultrasonic welding process.

[0047] In this embodiment, the absorption groove 6 is close to the corner of the cover body 2 .

[0048] The absorption groove is set at the corner of the cover body. When the base and the cover body are separated, the absorption groove is weak and the cover body will break from the absorption groove, so that the cover body cannot be restored and cannot be installed with the base. It is easy to find that the cover body and the base have been separated.

[0049] In this embodiment, an outward protrusion is provided at the bottom of the cover body, and an absorption groove is provided at the corner between the protrusion and the bottom of the cover body.

[0050] In this embodiment, a barb 11 is provided on the inner side of the base 1, and a limiting groove 12 is provided on the cover 2 to cooperate with the barb 11. The barb 11 is inserted into the limiting groove 12 to form a self-locking structure between the base 1 and the cover 2.

[0051] The barb is inserted into the limit groove when the base and the cover are in place up and down; under the primary anti-pry structure formed by the connecting part and the baffle, the barb and the limit groove of the self-locking structure constitute a secondary anti-pry structure when the primary anti-pry structure is destroyed, thereby further ensuring the anti-pry effect.

[0052] In this embodiment, the barbs of the barb member are arranged toward the base.

[0053] In this embodiment, a slot 21 is provided on the outer periphery of the cover body 2 , the joint surface 7 of the cover body 2 is located outside the slot 21 , the limiting groove 12 is located inside the slot 21 , and a protrusion is provided on the base 1 to be plugged into the slot 21 .

[0054] Improve the firmness of installation and reduce the impact of ultrasonic welding on the overall cover.

[0055] In this embodiment, the base is a plastic bottom box.

[0056] In this embodiment, the cover body includes an upper cover 22 and end covers 23 disposed at both ends of the upper cover 22 .

[0057] In this embodiment, a groove for installing a sealing strip is provided on the base, and the groove is located inside the joint surface 7 .

[0058] The specific assembly process is as follows: solder the PCBA of all components, assemble the PCBA in the base, then cover it, and then use an ultrasonic machine to solder the base and cover together. Finally, cover the end cover and the assembly is complete.

[0059] The cover is designed with a full circle of ultrasonic lines, a full circle of energy absorption grooves, and a full circle of baffles. The greater the energy during ultrasound, the easier it is to tear at the turning point of the cover. The absorption grooves can effectively improve the ultrasonic effect between the cover and the base. After the ultrasound is completed, a full circle of baffles wraps the ultrasonic coupling circle. At the same time, irreversible barbs and limit grooves are used between the cover and the base to form a self-locking structure after the base and cover are assembled. Combined with the external ultrasonic effect, the meter is difficult to open. If it is opened, the absorption grooves and baffles will be torn, causing damage, and the cover and base cannot be installed. It can be seen at a glance that the electricity meter has been pried open, and it can be dealt with in time.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pry-proof electric energy meter, comprising a base (1), a cover (2) and a circuit module (5), wherein the outer periphery of the base (1) is connected to the cover (2), and the circuit module (5) is placed in an installation area formed by the base (1) and the cover (2), characterized in that: A connecting portion (3) for fixedly connecting the base (1) and the cover (2) is provided between the joint surface (7) connecting the base (1) and the cover (2), and an annular closed retaining strip (4) is provided on the outer periphery of the joint surface (7).

2. The anti-tampering electric energy meter according to claim 1, characterized in that: The baffle (4) and the base (1) are integrally formed, and the joint surface between the baffle (4) and the base (1) is perpendicular.

3. The anti-tampering electric energy meter according to claim 1, characterized in that: The connection between the base (1) and the cover (2) is an outward protrusion (8).

4. The tamper-proof electric energy meter according to any one of claims 1 to 3, characterized in that: The connecting portion (3) comprises an annular groove (31) provided on the joint surface of the base (1), the annular groove (31) extending along the circumference of the joint surface of the base (1), and an ultrasonic welding strip (32) plug-fitting with the annular groove (31) is provided on the joint surface of the cover body (2), the ultrasonic welding strip (32) being ultrasonically welded in the annular groove (31) for fixed connection between the cover body (2) and the base (1).

5. The anti-tampering electric energy meter according to claim 4, characterized in that: An absorption groove (6) for absorbing ultrasonic welding energy is provided on a surface of the cover body (2) that is away from the joint surface (7) of the cover body (2).

6. The tamper-proof electric energy meter according to claim 5, characterized in that: The absorption groove (6) is close to the corner of the cover body (2).

7. The tamper-proof electric energy meter according to any one of claims 1 to 3, characterized in that: A barbed piece (11) is provided on the inner side of the base (1), and a limiting groove (12) cooperating with the barbed piece (11) is provided on the cover (2). The barbed piece (11) is snapped into the limiting groove (12) to form a self-locking structure between the base (1) and the cover (2).

8. The tamper-proof electric energy meter according to claim 7, characterized in that: A slot (21) is provided on the outer periphery of the cover body (2), the joint surface of the cover body (2) is located outside the slot (21), the limiting groove (12) is located inside the slot (21), and a protrusion is provided on the base (1) for plugging into the slot (21).

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