Tray assembly and calibrating device

Abstract

The utility model discloses a tray assembly and a calibrating device. The tray assembly comprises a base body, a limiting assembly and a locking assembly. The base body is provided with a bearing face and a limiting groove. A first limiting part and a second limiting part of the limiting assembly are detachably connected to the base body, the first limiting part is provided with a first position contained in the limiting groove and a second position at least partially stretching out of the limiting groove, and the second limiting part is provided with a third position contained in the limiting groove and a fourth position at least partially stretching out of the limiting groove. The locking assembly comprises a first locking part and a second locking part, and in the process that the first limiting part is switched from the second position to the first position, the first limiting part abuts against the first locking part; in the process that the second limiting part is switched from the fourth position to the third position, the second limiting part abuts against the second locking part. The tray assembly can improve the operation convenience when the tray assembly meets different bearing requirements.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter tray technology, and in particular to a tray assembly and a calibration device. Background Technology

[0002] The tray assembly is used to support electricity meters and perform automated testing. Existing tray assemblies include a base and a limiting part. The limiting part is located on the base to limit and fix the electricity meter mounted on it, thereby ensuring the stability of the meter's fixation. Electricity meters include various types such as single-phase meters, three-phase meters, and terminal meters, but the limiting part can only accommodate and fix one type of meter. When other types of meters need to be supported on the base, the limiting part will interfere with them, meaning that existing tray assemblies have poor compatibility. Related technologies use multiple limiting parts on the tray assembly to accommodate different types of meters; however, this approach lacks flexibility in different scenarios. When the tray assembly does not need to support a particular type of meter, the design redundancy can easily cause inconvenience in use. Utility Model Content

[0003] The main purpose of this utility model is to provide a pallet assembly and a testing device that can improve the ease of operation of the pallet assembly when dealing with different load-bearing requirements.

[0004] To achieve the above objectives, a first aspect of this utility model provides a tray assembly for carrying an electricity meter, the tray assembly comprising:

[0005] The base has a bearing surface on one side for supporting the energy meter, and the base is provided with a limiting groove that penetrates the bearing surface;

[0006] A limiting component includes a first limiting part and a second limiting part, both of which are detachably connected to the base. The first limiting part has a first position accommodated within the limiting groove and a second position at least partially extending out of the limiting groove. The second limiting part has a third position accommodated within the limiting groove and a fourth position at least partially extending out of the limiting groove. When the first limiting part is in the second position, it is used to position the first energy meter supported on the supporting surface. When the second limiting part is in the fourth position, it is used to position the second energy meter supported on the supporting surface.

[0007] A locking component includes a first locking part and a second locking part, both of which are disposed within the limiting groove and connected to the base.

[0008] During the process of the first limiting part switching from the second position to the first position, the first limiting part abuts against the first locking part so that the first locking part is fixedly connected to the first limiting part, thereby keeping the first limiting part in the first position; during the process of the second limiting part switching from the fourth position to the third position, the second limiting part abuts against the second locking part so that the second locking part is fixedly connected to the second limiting part, thereby keeping the second limiting part in the third position.

[0009] In some embodiments, when the first limiting part is in the first position and presses against the first locking part a second time, the first limiting part can move to the second position; when the second limiting part is in the third position and presses against the second locking part a second time, the second limiting part can move to the fourth position.

[0010] In some embodiments, the tray assembly includes a first elastic member and a second elastic member. The two ends of the first elastic member are respectively connected to the base and the first limiting part. When the first limiting part presses against the first locking part once, the first elastic member is compressed. After the first limiting part presses against the first locking part a second time, the first elastic member releases its elastic force and drives the first limiting part to switch from the first position to the second position. The two ends of the second elastic member are respectively connected to the base and the second limiting part. When the first limiting part presses against the first locking part once, the first elastic member is compressed. After the second limiting part presses against the second locking part a second time, the second elastic member releases its elastic force and drives the second limiting part to switch from the third position to the fourth position.

[0011] The first elastic element is detachably connected to the first limiting portion and / or the base, and the second elastic element is detachably connected to the second limiting portion and / or the base.

[0012] In some embodiments, the first limiting portion is used to separate the bearing surface into a first bearing area, the first energy meter is one of a single-phase energy meter, a three-phase energy meter, and a terminal energy meter, the first bearing area is adapted to accommodate the first energy meter, the second limiting portion is used to separate the bearing surface into a second bearing area, the second energy meter is one of the other two of a single-phase energy meter, a three-phase energy meter, and a terminal energy meter, the second bearing area is adapted to accommodate the second energy meter.

[0013] In some embodiments, the limiting groove includes a first limiting groove capable of accommodating the first limiting portion and a second limiting groove capable of accommodating the second limiting portion;

[0014] Specifically, when viewed along the opening direction of the first limiting groove, the outline shape of the first limiting groove is the same as the shape of the first limiting part, and / or, when viewed along the opening direction of the second limiting groove, the outline shape of the second limiting groove is the same as the shape of the second limiting part.

[0015] In some embodiments, the first limiting portion includes a locking portion, the first locking portion includes a first locking arm and a second locking arm, and the first locking portion is configured such that when subjected to a first pressing, the first locking arm and the second locking arm move closer to each other to clamp the locking portion, and when subjected to a second pressing, the first locking arm and the second locking arm move further away from each other to release the locking portion;

[0016] The first locking part further includes a lock body, and the first locking arm and the second locking arm are both connected to and protrude from the lock body. The first locking arm and the second locking arm are both configured to be elastically deformable relative to the lock body so that the first locking arm and the second locking arm can move away from each other.

[0017] In some embodiments, the first locking portion includes a stop portion, during which the stop portion presses against the first locking portion once, the stop portion presses against the first locking arm and the second locking arm to bring the first locking arm and the second locking arm closer to each other;

[0018] The first locking part further includes a lock seat having the stop portion. The first locking part includes a third elastic member. The two ends of the third elastic member are respectively connected to the lock seat and the lock body. When the first locking arm and the second locking arm approach each other, the third elastic member is compressed so as to drive the first locking arm and the second locking arm away from the stop portion when subjected to secondary pressure.

[0019] In some embodiments, the first locking part includes a movable member connected to the lock body, the lock seat is provided with a locking groove, the movable member is configured to have an unlocked position disengaged from the locking groove and a locked position at least partially located in the locking groove, in the locked position, the first locking arm and the second locking arm clamp the locking part, in the unlocked position, the first locking arm and the second locking arm release the locking part; when the first locking part is pressed once, the movable member is in the locked position, and when the first locking part is pressed a second time, the movable member switches from the locked position to the unlocked position.

[0020] In some embodiments, the tray assembly includes a clamping assembly connected to the base. The clamping assembly includes a first clamping portion and a second clamping portion arranged laterally at a distance. The base includes a first groove and a second groove arranged at a distance. The first clamping portion is elastically connected to the first groove, and the second clamping portion is elastically connected to the second groove, so that the first clamping portion and the second clamping portion can approach each other laterally to jointly clamp the electricity meter.

[0021] A second aspect of this utility model provides a testing device, comprising:

[0022] The tray assembly as described in the above embodiments, and,

[0023] A detection component for detecting the energy meter carried on the tray assembly.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] In this invention, the tray assembly includes a base, a limiting component, and a locking component. One side of the base has a bearing surface for supporting an electricity meter, and the base has a limiting groove penetrating the bearing surface. The limiting component is connected to the base. In related technologies, multiple limiting structures are simultaneously set on the tray assembly to accommodate different types of electricity meters, and lifting structures are set for each limiting structure, resulting in complex structures and cumbersome operation. In this solution, the first limiting part and the second limiting part are used to limit the first and second electricity meters respectively, and both are detachably connected to the base. Therefore, when the tray assembly needs to support one type of electricity meter but not another, the first or second limiting part can be removed as needed to avoid unnecessary limiting structures affecting the operation of the tray assembly. Thus, this solution improves the operational convenience of the tray assembly when dealing with different bearing requirements. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the tray assembly in the first embodiment of the present invention; wherein, the limiting components are all located in the second position;

[0028] Figure 2This is a top view of the tray assembly in the first embodiment of the present invention; wherein, the first limiting part, the second limiting part, and the third limiting part are shown;

[0029] Figure 3 This is an exploded view of the limiting component in the first embodiment of the present invention.

[0030] Figure 4 This is an exploded view of the tray assembly in the first embodiment of the present invention; wherein, the base, the limiting component, and the locking component are shown.

[0031] Figure 5 This is a schematic diagram of the tray assembly in the second embodiment of the present invention; wherein, the limiting components are all located in the second position;

[0032] Figure 6 This is a schematic diagram of the tray assembly in the third embodiment of the present invention; wherein, the limiting components are all located in the second position;

[0033] Figure 7 This is a schematic diagram of the tray assembly in the fourth embodiment of the present invention; wherein, the limiting components are all located in the second position;

[0034] Figure 8 This is a partial schematic diagram of the tray assembly in the first embodiment of the present invention; wherein, the first elastic member, the clamping assembly, and the locking assembly are shown;

[0035] Figure 9 for Figure 4 A partially enlarged schematic diagram at point A; showing the first locking arm, the second locking arm, and the limiting groove;

[0036] Figure 10 This is a cross-sectional schematic diagram of the tray assembly in the first embodiment of the present invention; wherein the limiting component is in the second position;

[0037] Figure 11 for Figure 6 A partially enlarged schematic diagram of the engagement position of the limiting components at point B; wherein, the first locking arm and the second locking arm release locking parts;

[0038] Figure 12 This is a partially enlarged schematic diagram of the engagement position of the limiting components; in which the first locking arm and the second locking arm release locking parts are shown.

[0039] Figure 13 This is a schematic diagram of the locking assembly in one embodiment of the present invention; wherein, the lock body, lock seat, and second elastic element are shown.

[0040] Figure 14 This is an exploded view of a locking component in one embodiment of the present invention; wherein, the movable part, the locking groove, and the stop are shown.

[0041] Figure 15 This is a partial exploded cross-sectional view of the locking component in one embodiment of the present invention; wherein, the guide protrusion and the locking groove are shown.

[0042] Explanation of icon numbers:

[0043] Tray assembly 10;

[0044] 100; 110; 111; 112; 120; 121; 122; 130; 140; 150; 160; 170; 180; 190; 100; 100; 110; 120; 130; 140; 150; 160; 170; 180; 19 ...11; 112; 120; 121; 122; 130; 140; 150; 160; 170; 180; 190; 190; 100;

[0045] Limiting component 200;

[0046] Locking part 210; Slot 211;

[0047] First limiting part 220; limiting grid 221;

[0048] Second limiting part 230; First limiting block 231; Second limiting block 232;

[0049] Locking component 300;

[0050] First locking part 310; first locking arm 311; first latching protrusion 3111; second locking arm 312; second latching protrusion 3121;

[0051] Second locking part 320;

[0052] Lock body 330; moving part 331; guide protrusion 332;

[0053] Lock base 340; stop part 341; locking groove 342; guide groove 343;

[0054] Third elastic element 350;

[0055] First elastic element 400;

[0056] Second elastic element 500;

[0057] Clamping assembly 600; first clamping part 610; second clamping part 620; fourth elastic member 630; fifth elastic member 640;

[0058] Horizontal (X)

[0059] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0061] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0062] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0063] The tray assembly is used to support electricity meters and perform automated testing. Existing tray assemblies include a base and a limiting part. The limiting part is located on the base to limit and fix the electricity meter mounted on it, thereby ensuring the stability of the meter's fixation. Electricity meters include various types such as single-phase meters, three-phase meters, and terminal meters, but the limiting part can only accommodate and fix one type of meter. When other types of meters need to be supported on the base, the limiting part will interfere with them, meaning that existing tray assemblies have poor compatibility. Related technologies use multiple limiting parts on the tray assembly to accommodate different types of meters; however, this approach lacks flexibility in different scenarios. When the tray assembly does not need to support a particular type of meter, the design redundancy can easily cause inconvenience in use. Specifically, on the one hand, when all limiting parts are equipped with a press-and-lift structure, each limiting part can be raised or retracted by pressing. Unused limiting parts must remain retracted, thus requiring high accuracy from the pressing device or operator. Incorrect pressing will cause unused limiting parts to rise incorrectly, failing to achieve the desired limiting effect. On the other hand, when there are many limiting parts or their arrangement is complex, using a pressing device to control the raising and lowering of the limiting parts leads to design difficulties and structural complexity. Manual operation requires extremely high accuracy from the operator. When the structures of various limiting parts are similar, confusion during operation is more likely. Furthermore, in some configurations, the limiting parts cannot fully retract into the tray assembly, meaning that even when some limiting parts are not in use, they may still affect the operation of the tray assembly.

[0064] In view of this, see Figures 1-15 This utility model provides a tray assembly 10 for carrying an electricity meter. The electricity meter includes a first electricity meter and a second electricity meter, both of which can be of any suitable type. In addition to the first and second electricity meters, the tray assembly 10 can also be adapted to carry other electricity meters. Specifically, the tray assembly 10 includes a base 100, a limiting component 200, and a locking component 300.

[0065] Reference Figures 1 to 7 The substrate 100 is used to support the electricity meter. Specifically, one side of the substrate 100 has a bearing surface 110 for supporting the electricity meter. (Refer to...) Figure 1 The bearing surface 110 can be located on the upper side of the base 100. The base 100 is also provided with a limiting groove 120 for installing the limiting component 200 and the locking component 300. It should be noted that the limiting groove 120 can penetrate through the bearing surface 110. In other words, the limiting groove 120 can be recessed into the bearing surface 110.

[0066] Reference Figures 1 to 7 The limiting component 200 is used to limit the electricity meter. The limiting component 200 includes a first limiting part 220 and a second limiting part 230. The first limiting part 220 and the second limiting part 230 are used to limit the first electricity meter and the second electricity meter, respectively. Therefore, the shapes of the first limiting part 220 and the second limiting part 230 can be set according to the shape of the first electricity meter and the second electricity meter, and the shapes or sizes of the first limiting part 220 and the second limiting part 230 can be the same or different. To improve the flexibility of the limiting component 200 in different limiting scenarios, both the first limiting part 220 and the second limiting part 230 can be detachably connected to the base 100. For application scenarios where the first limiting part 220 and the second limiting part 230 are detachably connected, please refer to the following text. For example, the detachable connection between the first limiting part 220 and the second limiting part 230 and the base 100 can be any one of snap connection, nested connection, magnetic connection, or threaded connection.

[0067] Reference Figures 8 to 12 The relative arrangement of the limiting component 200 and the base 100 is described below. The first limiting part 220 has a first position accommodated within the limiting groove 120 and a second position at least partially extending out of the limiting groove 120. When the first limiting part 220 is in the second position, it is used to position the first energy meter supported on the bearing surface 110. Specifically, when in the first position, the first limiting part 220 can be accommodated within the limiting groove 120, meaning that the limiting component 200 will not interfere with other energy meters. When in the second position, the first limiting part 220 can be arranged to at least partially extend out of the limiting groove 120, thus the limiting component 200 can limit the first energy meter, ensuring the stability of the energy meter supported by the tray assembly 10. Similarly, the second limiting part 230 has a third position accommodated within the limiting groove 120 and a fourth position at least partially extending out of the limiting groove 120. When the second limiting part 230 is in the fourth position, it is used to position the second energy meter supported on the bearing surface 110. The setting of the second limiting part 230 can be referred to the relevant setting of the first limiting part 220 in the above embodiment, and will not be repeated here.

[0068] Reference Figures 1 to 12 The locking component 300 is used to lock the limiting component 200 in a specific position. The locking component 300 includes a first locking part 310 and a second locking part 320. Both the first locking part 310 and the second locking part 320 are disposed in the limiting groove 120 and connected to the base 100. The limiting component 200 may have a structure that corresponds to and cooperates with the locking component 300. Taking the first limiting part 220 as an example, the first limiting part 220 may include a locking part 210. The locking part 210 is used to cooperate with the first locking part 310 and is locked by the first locking part 310. The locking part 210 described above will be used as the basis for the following description.

[0069] For the position switching process of limit component 200, refer to the following steps: Figures 11 to 12 Taking the first limiting part 220 as an example, when the first limiting part 220 is not needed for limiting, it can switch from the second position to the first position. During the position switching process, the first limiting part 220 presses against the first locking part 310 once, so that the first locking part 310 is fixedly connected to the first limiting part 220, thereby keeping the first limiting part 220 in the first position. This effectively suppresses the first limiting part 220 from extending out of the limiting groove 120 and interfering with other energy meters. Similarly, during the switching process of the second limiting part 230 from the fourth position to the third position, it presses against the second locking part 320 once, so that the second locking part 320 is fixedly connected to the second limiting part 230, thereby keeping the second limiting part 230 in the third position. This effectively suppresses the second limiting part 230 from extending out of the limiting groove 120 and interfering with other energy meters.

[0070] The position switching requirements of the limit component 200 vary depending on the different detection requirements. The detachable connection of the first limit part 220 and the second limit part 230 can improve the flexibility of the limit component 200 under different requirements. Specifically, when the tray assembly 10 needs to simultaneously carry the first energy meter and the second energy meter (or when the tray assembly 10 needs to switch between carrying the first energy meter and carrying the second energy meter for a period of time), the user can simultaneously install the first limiting part 220 and the second limiting part 230 on the base 100. Conversely, when the tray assembly 10 needs to carry the first energy meter but not the second energy meter, the user can disassemble the second limiting part 230 from the base 100 in advance. At this time, various operations of the tray assembly 10 are no longer affected by the second limiting part 230 and related structures. For example, the pressing device used to press and control the lifting of the first limiting part 220 or the second limiting part 230 no longer needs to accurately correspond to the shape and position of the first limiting part 220. The design requirements for the shape and size of the pressing device are lower, and there is no need to consider the possibility of accidentally touching the second limiting part 230. In addition, it can also avoid the situation of operator misoperation. When the tray assembly 10 needs to support the second energy meter but not the first energy meter, the design of this utility model can achieve a similar effect to the previous case, which will not be elaborated here.

[0071] In the technical solution of this utility model, the tray assembly 10 includes a base 100, a limiting component 200, and a locking component 300. One side of the base 100 has a bearing surface 110 for supporting an electricity meter, and the base 100 is provided with a limiting groove 120 penetrating the bearing surface 110. The limiting component 200 is connected to the base 100. In related technologies, multiple limiting structures are simultaneously set on the tray assembly 10 to adapt to different types of electricity meters, but lifting structures are set separately for each of these limiting structures, resulting in a complex structure and cumbersome operation. In the limiting component 200 of this solution, the first limiting part 220 and the second limiting part 230 are used to limit the first energy meter and the second energy meter, respectively, and both are detachably connected to the base 100. Therefore, when the tray assembly 10 needs to support one type of energy meter but not another, the first limiting part 220 or the second limiting part 230 can be removed as needed, thus avoiding unnecessary limiting structures from affecting the operation of the tray assembly 10. Therefore, this solution improves the operational convenience of the tray assembly 10 when dealing with different load-bearing requirements.

[0072] For ease of description, the following description uses embodiments where the first limiting part 220 and the second limiting part 230 have the same shape, structure, and driving method, differing only in their position and the object being limited. Therefore, the various settings for the first limiting part 220 (and its cooperating structure) in the following embodiments can be similarly applied to the second limiting part 230 (and its cooperating structure), and will not be repeated hereafter. Furthermore, the limiting parts described in this utility model refer to the first limiting part 220 and / or the second limiting part 230, and the locking parts described in this utility model refer to the first locking part 310 and / or the second locking part 320.

[0073] Conversely, when the limiting part in the limited position switches to the retracted position, if the limiting part in the retracted state needs to perform a limiting effect, the limiting part can at least partially pop out of the limiting groove 120 after being pressed. Specifically, refer to... Figures 12 to 11 When the first limiting part 220 is in the first position and presses against the first locking part 310 for the second time, the first limiting part 220 can move to the second position to achieve the limiting and fixing of the first energy meter. When the second limiting part 230 is in the third position and presses against the second locking part 320 for the second time, the second limiting part 230 can move to the fourth position.

[0074] Reference Figures 8 to 12The specific driving configuration of the limiting component 200 is described below. In some embodiments, the tray assembly 10 includes a first elastic member 400, the two ends of which are respectively connected to the base 100 and the first limiting portion 220. That is, the first limiting portion 220 can switch positions relative to the base 100 using the elastic force provided by the first elastic member 400. Specifically, when the locking portion 210 of the first limiting portion 220 presses against the first locking portion 310, the first elastic member 400 is compressed, so that after the first locking portion 310 releases the locking portion 210, the first limiting portion 220 is driven to switch from a first position to a second position. In other embodiments, the tray assembly 10 includes a driving rod, the two ends of which are respectively connected to the base 100 and the first limiting portion 220. The drive rod can be equipped with a sensor. When the locking part 210 presses against the first locking part 310, the sensor can detect this. After the first locking part 310 releases the locking part 210, the drive rod can directly drive the limiting component 200 to extend out of the limiting groove 120 and switch to the second position. This embodiment of the invention uses a tray assembly 10 equipped with a first elastic element 400 as an example. It should be noted that the tray assembly 10 can be equipped with multiple first elastic elements 400, and adjacent first elastic elements 400 can be arranged at intervals. Each first elastic element 400 can provide elastic force for the movement of the limiting component 200, thereby ensuring the reliability of the movement of the limiting component 200. The tray assembly 10 of this solution can use the elastic force of the first elastic elements 400 to drive the limiting component 200 to move and reset. The overall structure is simple, and the position switching operation is convenient and quick, ensuring the stability of the position switching. Similarly, in some embodiments, the tray assembly 10 includes a second elastic element 500, with its two ends connected to the base 100 and the first limiting portion 220, respectively. That is, the second limiting portion 230 can switch positions relative to the base 100 using the elastic force provided by the second elastic element 500. The relevant settings of the second elastic element 500 can refer to the relevant settings of the first elastic element 400 in the above embodiments, and will not be repeated here.

[0075] Furthermore, the first elastic member 400 is detachably connected to the first limiting portion 220 and / or the base 100, and the second elastic member 500 is detachably connected to the second limiting portion 230 and / or the base 100. Taking the first elastic member 400 as an example, it can be understood that the first elastic member 400 can be detachably connected to one or both of the first limiting portion 220 and the base 100. When the first elastic member 400 is detachably connected to one of them, the connection with the other can be a non-detachable connection (integral connection).

[0076] Reference Figures 5 to 7The following describes the specific limiting settings of the limiting component 200 for various types of energy meters. The first limiting part 220 is used to divide the bearing surface 110 into a first bearing area 111, which is suitable for accommodating the first energy meter. Similarly, the second limiting part 230 is used to divide the bearing surface 110 into a second bearing area 112, which is suitable for accommodating the second energy meter. It can be understood that the first limiting part 220 and the second limiting part 230 can respectively limit the first energy meter and the second energy meter, ensuring the stability of supporting the first energy meter and the second energy meter. Taking the first limiting part 220 as an example, it should be noted that the first limiting part 220 can divide the bearing surface 110 into multiple first bearing areas 111, thereby increasing the load-bearing capacity of the tray assembly 10.

[0077] Furthermore, the first limiting part 220 can be a limiting frame 221, which can be adapted to the structure of a single-phase meter to achieve stable limiting of the first energy meter. Specifically, the limiting frame 221 can simultaneously fix multiple first energy meters, as shown in the figure. Figure 1 This embodiment of the utility model is illustrated using the fixing of six first energy meters as an example. The second limiting part 230 has a first limiting block 231 and a second limiting block 232 arranged at intervals. The first limiting block 231 and the second limiting block 232 can be adapted to the structure of the second energy meters to achieve stable limiting of the three-phase energy meters. Specifically, the first limiting block 231 and the second limiting block 232 can fix multiple second energy meters simultaneously, as shown in the figure. Figure 1 This utility model embodiment is illustrated using two fixed second energy meters as an example.

[0078] Furthermore, in some embodiments, the first energy meter is one of a single-phase meter, a three-phase meter, and a terminal meter, and the second energy meter is one of the other two of a single-phase meter, a three-phase meter, and a terminal meter. For the above limitations, exemplarily, when the first energy meter is a single-phase meter, the second energy meter is any one of a three-phase meter and a terminal meter. Further, refer to... Figures 5 to 7In some embodiments, the limiting component 200 for limiting the energy meter only includes the first limiting part 220 and the second limiting part 230, that is, the tray component 10 can only be used to place two types of energy meters (it can place two types of energy meters at the same time, or it can only place one type of energy meter at the same time); in other embodiments, the limiting component 200 also includes a third limiting part, which is used to position the third energy meter supported on the bearing surface 110. That is, the function of the third limiting part is similar to that of the first limiting part 220 and the second limiting part 230, the only difference being that the type of energy meter being positioned is different. Therefore, the setting of the third limiting part can refer to the relevant settings of the first limiting part 220 and the second limiting part 230 in various embodiments of this utility model. When the third limiting part is provided, the first limiting part 220, the second limiting part 230, and the third limiting part can each be responsible for positioning one of the single-phase energy meter, the three-phase energy meter, and the terminal energy meter.

[0079] Based on the detachable connection of the limit component 200, to facilitate the assembly and disassembly of the limit component 200, refer to... Figure 3 In some embodiments, the limiting groove 120 includes a first limiting groove 121 capable of accommodating the first limiting portion 220 and a second limiting groove 122 capable of accommodating the second limiting portion 230. Regarding the first limiting groove 121, in some embodiments, when viewed along the opening direction of the first limiting groove 121, the outline shape of the first limiting groove 121 is the same as the shape of the first limiting portion 220. Similarly, regarding the second limiting groove 122, in some embodiments, when viewed along the opening direction of the second limiting groove 122, the outline shape of the second limiting groove 122 is the same as the shape of the second limiting portion 230. The first limiting groove 121 and the second limiting groove 122 described above serve two purposes: firstly, they allow the limiting groove 120 to correspond to the limiting part, reducing the opening area of ​​the tray assembly 10; secondly, by matching the shape of the limiting groove 120 to the shape of the limiting part, it is convenient for operators to quickly install the first limiting part 220 or the second limiting part 230 into the corresponding limiting groove 120 when reassembly is required, based on their shape. Depending on the requirements, in some embodiments, the first limiting part 220 and the second limiting part 230 can both be accommodated in the same limiting groove 120.

[0080] For the locking engagement structure between the first limiting part 220 and the first locking part 310, refer to Figures 11 to 12The first limiting part 220 includes a locking part 210, and the first locking part 310 includes a first locking arm 311 and a second locking arm 312. The first locking part 310 is configured such that when subjected to a first pressing, the first locking arm 311 and the second locking arm 312 move closer to each other to clamp the locking part 210, and when subjected to a second pressing, the first locking arm 311 and the second locking arm 312 move further apart to release the locking part 210. That is, this solution, by having the first locking arm 311 and the second locking arm 312 cooperate to clamp or release the locking part 210, can reliably maintain the limiting component 200 at the target position, improving the stability of the position switching of the limiting component 200; and by having the locking part 210 press against the locking component 300 once or twice, the limiting component 200 can switch between the first position and the second position, making the overall operation convenient and quick, and improving the position switching efficiency of the limiting component 200.

[0081] Reference Figures 11 to 12 The following describes the drive configuration that moves the first locking arm 311 and the second locking arm 312 away from each other. In some embodiments, the locking assembly 300 includes a lock body 330, the first locking arm 311 is connected to the lock body 330 and protrudes from the lock body 330, and the second locking arm 312 is connected to the lock body 330 and protrudes from the lock body 330. Both the first locking arm 311 and the second locking arm 312 are elastically deformable relative to the lock body 330, so that the first locking arm 311 and the second locking arm 312 can move away from each other. In other embodiments, the locking assembly 300 may be provided with a drive unit, in which the first locking arm 311 and the second locking arm 312 are slidably connected to the lock body 330, and the drive unit can drive the first locking arm 311 and the second locking arm 312 away from each other.

[0082] It should be noted that in some embodiments, the position of the first locking arm 311 can be fixed, and the second locking arm 312 can be moved away from the first locking arm 311 to achieve unlocking. In other embodiments, the position of the second locking arm 312 can be fixed, and the first locking arm 311 can be moved away from the second locking arm 312 to achieve unlocking.

[0083] This utility model embodiment is illustrated by taking the first locking arm 311 and the second locking arm 312 as an example of moving away from each other by elastic deformation. In this solution, the movement of the first locking arm 311 and the second locking arm 312 away is convenient and quick, that is, the locking part 210 can be released accurately and quickly, ensuring the stability of the position switching of the limiting component 200.

[0084] Reference Figures 11 to 12The following describes the driving arrangement for the first locking arm 311 and the second locking arm 312 to move closer to each other. In some embodiments, the locking assembly 300 includes a stop 341. During the process of the locking part 210 pressing against the locking assembly 300 once, the stop 341 can press against the first locking arm 311 and the second locking arm 312 to bring the first locking arm 311 and the second locking arm 312 closer to each other. In other embodiments, the stop 341 can press against the first locking arm 311 to bring the first locking arm 311 closer to the second locking arm 312. In other embodiments, the stop 341 can press against the second locking arm 312 to bring the second locking arm 312 closer to the first locking arm 311. This embodiment of the present invention is described using the example of the stop 341 pressing against the first locking arm 311 and the second locking arm 312 to bring the first locking arm 311 and the second locking arm 312 closer to each other.

[0085] Reference Figures 11 to 15 It should be noted that the locking portion 210 of the limiting component 200 can be provided with a slot 211. The first locking arm 311 can be provided with a first latching protrusion 3111, and the second locking arm 312 can be provided with a second latching protrusion 3121. The structures of the first latching protrusion 3111 and the second latching protrusion 3121 can be the same, and both the first latching protrusion 3111 and the second latching protrusion 3121 can be adapted to the slot 211. When the first locking arm 311 and the second locking arm 312 approach each other to clamp the locking portion 210, the first latching protrusion 3111 can pass through the slot 211 of the locking portion 210, and the second latching protrusion 3121 can pass through the slot 211 of the locking portion 210, which can improve the stability of the connection between the locking component 300 and the limiting component 200, so that the limiting component 200 is stably maintained in the first position. In this design, the stop part 341 can press the first locking arm 311 and the second locking arm 312 against the locking component 300 during the process of the locking part 210 pressing against the locking component 300, so that the first locking arm 311 and the second locking arm 312 are relatively close to each other to achieve locking. The first locking arm 311 and the second locking arm 312 can be driven to move relatively close by the pressing force of the locking part 210, without the need to add an additional power source. The overall drive structure is simple and the drive process is convenient and quick.

[0086] Reference Figures 13 to 15The following describes the separate arrangement of the first locking arm 311 and the second locking arm 312 with the stop portion 341. In some embodiments, the locking assembly 300 includes a lock seat 340, which has a stop portion 341. The locking assembly 300 includes a third elastic member 350, the two ends of which are respectively connected to the lock seat 340 and the lock body 330. That is, the lock body 330 can move relative to the lock seat 340 using the elastic force provided by the third elastic member 350, thereby allowing the first locking arm 311 and the second locking arm 312 connected to the lock body 330 to move relative to the stop portion 341. Specifically, during the process of the first locking arm 311 and the second locking arm 312 approaching each other, the third elastic member 350 can be compressed to drive the first locking arm 311 and the second locking arm 312 away from the stop portion 341 when subjected to secondary pressure. Therefore, the stop portion 341 will no longer apply pressure to the first locking arm 311 and the second locking arm 312, that is, the first locking arm 311 and the second locking arm 312 can release the locking portion 210 through elastic deformation to achieve unlocking. In other embodiments, the locking assembly 300 includes a driving part, with its two ends connected to the lock seat 340 and the lock body 330, respectively. The driving part can be equipped with a sensor, which can be sensed when the locking portion 210 is subjected to secondary pressure on the locking assembly 300. That is, the driving part can directly drive the first locking arm 311 and the second locking arm 312 to disengage from the stop portion 341. This embodiment of the present invention is described using the example of the locking assembly 300 disengaging from the stop portion 341 by the elastic force of the third elastic member 350.

[0087] It should be noted that the pallet assembly 10 can be equipped with multiple third elastic elements 350, which can be arranged at intervals between adjacent third elastic elements 350. Each third elastic element 350 can provide elastic force for the first locking arm 311 and the second locking arm 312 to disengage from the stop part 341, ensuring the reliability of the movement. In this solution, the first locking arm 311 and the second locking arm 312 can disengage from the stop part 341 using the elastic force of the third elastic element 350. The overall structure is simple and the position switching operation is convenient and quick, ensuring the stability of position switching.

[0088] Reference Figures 13 to 15The locking and unlocking process of the locking component 300 on the limiting component 200 is described below. In some embodiments, the locking component 300 includes a movable member 331, which can be connected to the lock body 330 and is located between the lock body 330 and the third elastic member 350. The lock seat 340 can be provided with a locking groove 342. The movable member 331 has an unlocked position and a locked position relative to the lock seat 340. Specifically, when the movable member 331 is in the unlocked position, the movable member 331 can disengage from the locking groove 342, that is, the movable member 331 is not fixedly connected to the lock seat 340. Therefore, the third elastic member 350 can push the first locking arm 311 and the second locking arm 312 away from the stop part 341, so that the first locking arm 311 and the second locking arm 312 can release the locking part 210 and thus achieve unlocking. When the movable member 331 is in the locked position, the movable member 331 can at least partially penetrate the locking groove 342, that is, the movable member 331 connects the lock seat 340 and the lock body 330. Therefore, the stop part 341 can stably press against the first locking arm 311 and the second locking arm 312 and clamp the locking part 210 to achieve locking.

[0089] It should be noted that when the locking component 300 is pressed once, the movable part 331 can be in the locked position. When the locking component 300 is pressed a second time, the movable part 331 can switch from the locked position to the unlocked position. The switching operation between the locked and unlocked positions of the locking component 300 in this solution is convenient and quick, and it can adapt to the position switching process of the limiting component 200, realizing the press locking and unlocking of the limiting component 200, and improving the compatibility of the tray component 10.

[0090] Reference Figures 13 to 15 The following describes the cooperative arrangement of the lock body 330 and the lock seat 340. In some embodiments, the lock body 330 may be provided with a guide protrusion 332, and the lock seat 340 may be provided with a guide groove 343. When the movable member 331 switches from the locked position to the unlocked position, the guide protrusion 332 can slide within the guide groove 343. In other embodiments, the lock body 330 may be provided with a guide groove 343, and the lock seat 340 may be provided with a guide protrusion 332. When the movable member 331 switches from the locked position to the unlocked position, the guide protrusion 332 can slide within the guide groove 343. This solution, by providing the guide protrusion 332 and the guide groove 343, enables the lock body 330 to move accurately relative to the lock seat 340, ensuring the reliability of the locking and unlocking process.

[0091] Reference Figures 1 to 9The specific fixing arrangement of the tray assembly 10 is described below. In some embodiments, the tray assembly 10 includes a clamping assembly 600, which can clamp and fix the electricity meter. Specifically, the clamping assembly 600 is connected to the base 100. The clamping assembly 600 includes a first clamping part 610 and a second clamping part 620, which can be arranged at a distance of X along the lateral direction. It can be understood that the structure of the first clamping part 610 can be the same as or different from that of the second clamping part 620. This embodiment of the present invention is described using the example of the first clamping part 610 and the second clamping part 620 having the same structure.

[0092] Reference Figures 1 to 9 Both the first clamping part 610 and the second clamping part 620 are used to clamp the energy meter. In some embodiments, the first clamping part 610 and the second clamping part 620 can jointly clamp the energy meter. In other embodiments, the first clamping part 610 can move toward the limiting component 200 to jointly clamp the energy meter. In other embodiments, the second clamping part 620 can move toward the limiting component 200 to jointly clamp the energy meter. This utility model embodiment is described using the example of the first clamping part 610 and the second clamping part 620 respectively cooperating with the limiting component 200 to clamp the energy meter. The clamping component 600 of this solution can realize the edge positioning of the energy meter, effectively improve the stability of the tray assembly 10 carrying the energy meter, and prevent the energy meter from falling off the tray assembly 10.

[0093] Reference Figure 8 and Figure 9 The movement configuration of the first clamping part 610 and the second clamping part 620 is described below. In some embodiments, both the first clamping part 610 and the second clamping part 620 can be elastically connected to the base 100. It is understood that the clamping assembly 600 may be provided with a fourth elastic member 630 and a fifth elastic member 640. One end of the fourth elastic member 630 can be connected to the first clamping part 610, and the other end can be connected to the base 100. One end of the fifth elastic member 640 can be connected to the second clamping part 620, and the other end can be connected to the base 100. When the clamping assembly 600 needs to clamp and fix the energy meter, the first clamping part 610 and the second clamping part 620 are first driven to move away from the limiting assembly 200. At this time, the fourth elastic member 630 and the fifth elastic member 640 are both stretched. Then the energy meter is placed on the bearing surface 110. The fourth elastic member 630 can drive the first clamping part 610 and the limiting assembly 200 to clamp the energy meter by its own tension. The fifth elastic member 640 can drive the second clamping part 620 and the limiting assembly 200 to clamp the energy meter by its own tension.

[0094] It should be noted that, to improve the stability of the assembly connection between the fourth elastic element 630 and the fifth elastic element 640 and the base 100, the base 100 may have a first groove 130 and a second groove 140. The first clamping part 610 may be elastically connected to the first groove 130, and the second clamping part 620 may be elastically connected to the second groove 140. It is understood that the base 100 may have multiple first grooves 130 and multiple second grooves 140. Adaptively, the clamping assembly 600 may arrange multiple first clamping parts 610 and multiple second clamping parts 620, with each first clamping part 610 elastically connected to each first groove 130 and each second clamping part 620 elastically connected to each second groove 140. This solution, by setting multiple first clamping parts 610 and multiple second clamping parts 620, can further improve the stability of the electricity meter's fixation.

[0095] Reference Figures 1 to 4 In some embodiments, the base 100 also includes a frame 150. For example, the lateral X-dimensional dimension of the frame 150 can be 410mm*410mm, thus adapting to a conveyor line with a width of 400mm. A clamping and resetting mechanism can be provided on the conveyor line. When an energy meter needs to be placed, the clamping and resetting mechanism can drive the first clamping part 610 and the second clamping part 620 to open. After the energy meter is placed, the first clamping part 610 and the second clamping part 620 can clamp and position the energy meter. In other embodiments, the clamping parts on both sides of the frame 150 can be fixed to the base 100, and the clamping part in the middle of the base 100 can be fixed to the limiting component 200, meaning that this clamping part can float vertically with the limiting component 200. It can be understood that the frame 150 can cooperate with the conveyor line to transport the pallet assembly 10, realizing a streamlined transportation of the pallet assembly 10. The conveyor line can be a belt conveyor.

[0096] Reference Figure 4 In some embodiments, the base 100 is further provided with a fixing plate 170, which can fix the base 100 to the frame 150. In other embodiments, the base 100 is further provided with a positioning pin 180 for positioning the tray assembly 10. It is understood that the tray assembly 10 also includes a code carrier 190, which can use RIFD (Radio Frequency Identification) technology to identify information of the tray assembly 10. In other embodiments, the tray assembly 10 also includes a conductive plate 160, which can be connected to an electricity meter for withstand voltage testing.

[0097] It should be noted that existing industry standards have uniform regulations regarding the dimensions of electricity meters. The dimensions of a single-phase meter are 112mm*160mm, a three-phase meter are 160mm*250mm, and a terminal meter are 180mm*260mm. Considering the need for the meter placement to accommodate compatible meter mounts and ensure that the probes align with the terminal holes after the tray is positioned, the limiting position of the tray assembly 10 must be arranged based on the connection position of the compatible meter mount.

[0098] In a specific embodiment of this utility model, the first limiting part 220, the second limiting part 230, and the third limiting part of the limiting component 200 are all arranged as floating structures, which can switch the state of the limiting parts according to the fixing requirements of different types of electricity meters. When the limiting component 200 is in the initial state, the first limiting part 220 and the second limiting part 230 are both arranged protruding from the limiting groove 120. Taking the fixing of a single-phase electricity meter, with the first limiting part 220 used to limit the single-phase electricity meter and the second limiting part 230 used to limit the three-phase electricity meter as an example, when it is necessary to place the single-phase electricity meter, the second limiting part 230 can be pressed once, so that the locking part 210 of the second limiting part 230 is engaged with the locking component 300, that is, the second limiting part 230 is accommodated in the limiting groove 120 (without interfering with the normal placement of the single-phase electricity meter), and then the single-phase electricity meter can be placed and fixed. If a three-phase meter needs to be fixed later, the first limiting part 220 can be pressed down once (without interfering with the normal placement of the three-phase meter) to make the locking part 210 of the first limiting part 220 engage with the locking component 300, that is, the first limiting part 220 is accommodated in the limiting groove 120. The second limiting part 230 is pressed down a second time (the second limiting part 230 has already been pressed down once when fixing the single-phase meter), that is, the first locking arm 311 and the second locking arm 312 can move away from each other until the locking part 210 of the second limiting part 230 is released, and the elastic force of the first elastic member 400 makes the second limiting part 230 protrude out of the limiting groove 120 to limit and fix the three-phase meter.

[0099] A second aspect of this utility model provides a testing device, which includes a tray assembly 10 and a testing component as described in the above embodiments. The testing component is used to test the electricity meter carried on the tray assembly 10. This testing device can test various types of electricity meters and can meet diverse testing needs. Thanks to the improvements made to the tray assembly 10 in the above embodiments, the testing device of this second aspect of the utility model has the same technical effects as the tray assembly 10 in the above embodiments. Further details will not be provided here.

[0100] It should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. When a directional reference is introduced in a specific embodiment, unless the direction is specifically limited to unidirectional, the direction can be unidirectional or bidirectional (two parallel and opposite directions). Whether it is unidirectional or bidirectional depends on what those skilled in the art can achieve. When the directional reference is bidirectional, it should be considered that two parallel and different embodiments have been introduced simultaneously.

[0101] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0102] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A tray assembly for carrying an electricity meter, the electricity meter comprising a first electricity meter and a second electricity meter, characterized in that, The tray assembly includes: The base has a bearing surface on one side for supporting the energy meter, and the base is provided with a limiting groove that penetrates the bearing surface; A limiting component includes a first limiting part and a second limiting part, both of which are detachably connected to the base. The first limiting part has a first position accommodated within the limiting groove and a second position at least partially extending out of the limiting groove. The second limiting part has a third position accommodated within the limiting groove and a fourth position at least partially extending out of the limiting groove. When the first limiting part is in the second position, it is used to position the first energy meter supported on the supporting surface. When the second limiting part is in the fourth position, it is used to position the second energy meter supported on the supporting surface. A locking component includes a first locking part and a second locking part, both of which are disposed within the limiting groove and connected to the base. During the process of the first limiting part switching from the second position to the first position, the first limiting part abuts against the first locking part so that the first locking part is fixedly connected to the first limiting part, thereby keeping the first limiting part in the first position; during the process of the second limiting part switching from the fourth position to the third position, the second limiting part abuts against the second locking part so that the second locking part is fixedly connected to the second limiting part, thereby keeping the second limiting part in the third position.

2. The tray assembly according to claim 1, characterized in that, When the first limiting part is in the first position and presses against the first locking part for the second time, the first limiting part can move to the second position; when the second limiting part is in the third position and presses against the second locking part for the second time, the second limiting part can move to the fourth position.

3. The tray assembly according to claim 2, characterized in that, The tray assembly includes a first elastic element and a second elastic element. The two ends of the first elastic element are respectively connected to the base and the first limiting part. When the first limiting part presses against the first locking part once, the first elastic element is compressed. After the first limiting part presses against the first locking part a second time, the first elastic element releases its elastic force and drives the first limiting part to switch from the first position to the second position. The two ends of the second elastic element are respectively connected to the base and the second limiting part. When the first limiting part presses against the first locking part once, the first elastic element is compressed. After the second limiting part presses against the second locking part a second time, the second elastic element releases its elastic force and drives the second limiting part to switch from the third position to the fourth position. The first elastic element is detachably connected to the first limiting portion and / or the base, and the second elastic element is detachably connected to the second limiting portion and / or the base.

4. The tray assembly according to claim 1, characterized in that, The first limiting part is used to separate the bearing surface into a first bearing area. The first energy meter is one of a single-phase energy meter, a three-phase energy meter, and a terminal energy meter. The first bearing area is adapted to accommodate the first energy meter. The second limiting part is used to separate the bearing surface into a second bearing area. The second energy meter is one of the other two of a single-phase energy meter, a three-phase energy meter, and a terminal energy meter. The second bearing area is adapted to accommodate the second energy meter.

5. The tray assembly according to claim 1, characterized in that, The limiting groove includes a first limiting groove capable of accommodating the first limiting part and a second limiting groove capable of accommodating the second limiting part; Specifically, when viewed along the opening direction of the first limiting groove, the outline shape of the first limiting groove is the same as the shape of the first limiting part, and / or, when viewed along the opening direction of the second limiting groove, the outline shape of the second limiting groove is the same as the shape of the second limiting part.

6. The tray assembly according to claim 1, characterized in that, The first limiting part includes a locking part, and the first locking part includes a first locking arm and a second locking arm. The first locking part is configured such that when it is pressed once, the first locking arm and the second locking arm move closer to each other to clamp the locking part, and when it is pressed a second time, the first locking arm and the second locking arm move further away from each other to release the locking part. The first locking part further includes a lock body, and the first locking arm and the second locking arm are both connected to and protrude from the lock body. The first locking arm and the second locking arm are both configured to be elastically deformable relative to the lock body so that the first locking arm and the second locking arm can move away from each other.

7. The tray assembly according to claim 6, characterized in that, The first locking part includes a stop part. During the process of the locking part pressing against the first locking part once, the stop part presses against the first locking arm and the second locking arm so that the first locking arm and the second locking arm move closer to each other. The first locking part further includes a lock seat having the stop portion. The first locking part includes a third elastic member. The two ends of the third elastic member are respectively connected to the lock seat and the lock body. When the first locking arm and the second locking arm approach each other, the third elastic member is compressed so as to drive the first locking arm and the second locking arm away from the stop portion when subjected to secondary pressure.

8. The tray assembly according to claim 7, characterized in that, The first locking part includes a movable member connected to the lock body. The lock seat is provided with a locking groove. The movable member is configured to have an unlocked position that is disengaged from the locking groove and a locked position that is at least partially located in the locking groove. In the locked position, the first locking arm and the second locking arm clamp the locking part. In the unlocked position, the first locking arm and the second locking arm release the locking part. When the first locking part is pressed once, the movable member is in the locked position. When the first locking part is pressed a second time, the movable member switches from the locked position to the unlocked position.

9. The tray assembly according to claim 1, characterized in that, The tray assembly includes a clamping assembly connected to the base. The clamping assembly includes a first clamping portion and a second clamping portion arranged laterally at a distance. The base includes a first groove and a second groove arranged at a distance. The first clamping portion is elastically connected to the first groove, and the second clamping portion is elastically connected to the second groove, so that the first clamping portion and the second clamping portion can approach each other laterally to jointly clamp the electricity meter.

10. A calibration device, characterized in that, include: The tray assembly according to any one of claims 1-9; as well as, A detection component for detecting the energy meter carried on the tray assembly.

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