Power factor measuring device

Abstract

The utility model provides a power factor measuring device, and relates to the technical field of measuring instruments. The power factor measuring device comprises a shell assembly, a measuring assembly and a display assembly which are matched with each other. The shell assembly comprises a first shell, a second shell and a third shell. The first shell comprises a mounting part and a shielding part which are integrally arranged, the mounting part comprises a first connecting structure, and the shielding part can shield part of the display assembly. The second shell comprises a second connecting structure and a third connecting structure which are arranged in a spaced mode, and the second connecting structure is detachably connected with the first connecting structure. The third shell comprises a fourth connecting structure, and the fourth connecting structure is detachably connected with the third connecting structure. According to the power factor measuring device provided by the embodiment of the invention, the assembling steps of the power factor measuring device can be simplified, and the assembling efficiency of the power factor measuring device can be improved.

Description

Technical Field

[0001] This application relates to the field of measuring instrument technology, and in particular to a power factor measuring device. Background Technology

[0002] A power factor measuring device is an instrument used to measure the power factor of a circuit. The power factor measuring device includes a housing assembly, a measuring component, and a display component, with the measuring component and display component housed within the housing assembly.

[0003] The power factor measuring device can convert the alternating current in the circuit under test into a direct current through the measuring component, and then indicate the power factor of the circuit under test through the display component based on the converted direct current.

[0004] Based on the existing structure of the shell assembly, there are many structural components, which makes the assembly process of the shell assembly quite complicated. Utility Model Content

[0005] This application provides a power factor measuring device to simplify the structure of the power factor measuring device, simplify the assembly steps of the power factor measuring device, and improve the assembly efficiency of the power factor measuring device.

[0006] In a first aspect, this application provides a power factor measuring device, which includes a housing assembly, a measuring assembly, and a display assembly. The measuring assembly is used to measure the power factor of the circuit under test, and the display assembly is used to display the measurement results of the measuring assembly. The housing assembly includes a first housing, a second housing, and a third housing.

[0007] The display component is installed in the first housing. The first housing includes an integrally formed mounting part and a shielding part. The mounting part includes a first connecting structure. The shielding part is used to shield part of the display component. The mounting part and the shielding part cooperate to form a display window. The display window is used to observe the display component.

[0008] The second housing includes a second connecting structure and a third connecting structure spaced apart. The second connecting structure is located closer to the first housing than the third connecting structure, and the second connecting structure is detachably connected to the first connecting structure. The third housing is located on the side of the second housing opposite to the first housing. The third housing includes a fourth connecting structure, which is detachably connected to the third connecting structure. The third housing and the second housing cooperate to form a mounting cavity, into which the measuring component is installed.

[0009] Compared to the prior art where the mounting part and the shielding part are separate, in this application example, the mounting part and the shielding part are integrated, which can simplify the structure of the housing assembly and improve the assembly efficiency of the housing assembly.

[0010] In this application example, the first housing includes an integrally formed mounting portion and a shielding portion. The mounting portion includes a first connecting structure, which cooperates with a second connecting structure disposed on the second housing to achieve connection between the first housing and the second housing. The shielding portion can shield part of the display components to improve the aesthetic performance of the power factor measurement device.

[0011] The first housing, the second housing, and the third housing work together to provide mounting space for the measuring and display components.

[0012] A first connecting structure is located in the first housing, and a second connecting structure is located in the second housing. The first housing and the second housing can be connected by the cooperation of the first connecting structure and the second connecting structure. The second housing is also provided with a third connecting structure, and the third housing is provided with a fourth connecting structure. The second housing and the third housing can be connected by the cooperation of the third connecting structure and the fourth connecting structure.

[0013] In some possible implementations, the first connecting structure is a snap-fit ​​structure, and the second connecting structure is a slot structure, with the snap-fit ​​structure snapping into the slot structure. Alternatively, the first connecting structure is a slot structure, and the second connecting structure is a snap-fit ​​structure, with the snap-fit ​​structure snapping into the slot structure.

[0014] In this application example, regardless of whether the first connecting structure is a snap-fit ​​structure and the second connecting structure is a slot structure, or whether the first connecting structure is a slot structure and the second connecting structure is a snap-fit ​​structure, the snap-fit ​​structure can engage with the slot structure to achieve the cooperation between the first shell and the second shell.

[0015] Furthermore, in this application example, the connection between the first housing and the second housing is achieved by the snap-fit ​​of the slot structure and the snap-fit ​​structure. Compared with the connection between the first housing and the second housing by the bolt structure, the use of bolts or other threaded fasteners can be saved, thereby reducing the manufacturing cost of the power factor measuring device.

[0016] In some possible implementations, the first connection structure is spaced multiple times, and the second connection structure corresponds to the first connection structure.

[0017] In this application example, multiple first connecting structures are spaced apart, and the second connecting structures correspond to the first connecting structures. The first connecting structures and the second connecting structures cooperate to connect the first housing and the second housing from different positions to ensure the reliability of the connection between the first housing and the second housing.

[0018] In some possible implementations, the display component includes a drive mechanism and a dial structure, with a shielding portion used to shield the drive mechanism along the direction from the first housing to the second housing. The third housing includes an integrally formed base, a support member, and a receiving cavity.

[0019] The base is provided with a fourth connection structure, which connects to the side of the second housing opposite to the first housing, and the base is fixedly connected to the measuring component.

[0020] The support is located on the side of the base facing the second housing, extends into the second housing, and the end of the support away from the base is connected to the dial structure.

[0021] The receiving cavity is located on the side of the base facing the second housing, and is spaced apart from the support member. The receiving cavity is used to accommodate the drive mechanism.

[0022] Compared to the prior art where the base, support, and housing are separate components, in this application example, the base, support, and housing are integrated, which reduces the number of structural components in the power factor measuring device, reduces assembly steps, and improves the assembly efficiency of the power factor measuring device.

[0023] In some possible implementations, three support members are spaced apart, with the three support members positioned near different side walls of the base.

[0024] Three spaced-out support members can support the dial structure from different positions, ensuring the reliability of the connection between the dial structure and the base, and reducing the amplitude of the dial structure's sway relative to the housing assembly.

[0025] In some possible implementations, the measuring components include electrically connected circuit boards and electronic components, circuit boards and multiple supports, and spaced-apart cavities.

[0026] In this application example, the circuit board is spaced apart from multiple supports and the receiving cavity, which can reduce the possibility of the circuit board abutting against the supports and the receiving cavity, thereby reducing the possibility of unreliable connection between the circuit board and electronic components due to the abutting against the supports and the receiving cavity.

[0027] In some possible implementations, the electronic components include electrically connected potentiometers and electrolytic capacitors, with the potentiometers having a resistance range of 0~200kΩ.

[0028] Compared to existing technologies that use a potentiometer with a resistance range of 0~20kΩ connected in series with a metal film resistor to limit the circuit current, this application example directly uses a potentiometer with a resistance range of 0~200kΩ to limit the circuit current, which can save one metal film resistor. This results in fewer electronic components connected to the circuit board, eliminating redundant structures on the circuit board and saving manufacturing costs for the power factor measurement device.

[0029] In some possible implementations, the potentiometer includes a first resistor and a second resistor connected in series.

[0030] In some possible implementations, the third connecting structure is a snap-fit ​​structure, and the fourth connecting structure is a slot structure, with the snap-fit ​​structure snapping into the slot structure. Alternatively, the third connecting structure is a slot structure, and the fourth connecting structure is a snap-fit ​​structure, with the snap-fit ​​structure snapping into the slot structure.

[0031] Regardless of whether the third connecting structure is a snap-fit ​​structure and the fourth connecting structure is a slot structure, or whether the third connecting structure is a slot structure and the fourth connecting structure is a snap-fit ​​structure, the snap-fit ​​structure can engage with the slot structure to achieve the cooperation between the second and third housings.

[0032] Furthermore, in this application example, the connection between the second housing and the third housing is achieved by the snap-fit ​​of the slot structure and the snap-fit ​​structure. Compared with the connection between the second housing and the third housing by the bolt structure, the use of bolts or other threaded fasteners can be saved, further reducing the manufacturing cost of the power factor measuring device.

[0033] In some possible implementations, the power factor measuring device also includes a protective element that is detachably mounted on the mounting section.

[0034] By installing protective components, the display window can be blocked, reducing the possibility of dust, water, and other impurities entering the power factor measuring device from the display window, thereby ensuring the reliability of the power factor measuring device and extending its service life. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a power factor measuring device provided as an example of this application.

[0036] Figure 2 This is an exploded structural diagram of a power factor measuring device provided as an example of this application.

[0037] Figure 3 This is a schematic diagram of the internal structure of a power factor measuring device provided as an example of this application.

[0038] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0039] Figure 5 for Figure 3 A magnified view of a portion of point B in the middle.

[0040] Figure 6 This is a schematic diagram of the structure of a first shell provided as an example of this application.

[0041] Figure 7 This is a schematic diagram of the structure of a second shell provided as an example of this application.

[0042] Figure 8 This is a schematic diagram of a third shell provided as an example of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Housing assembly; 110. First housing; 111. Mounting part; 112. First connecting structure; 113. Shielding part; 114. Display window; 120. Second housing; 121. Second connecting structure; 122. Third connecting structure; 130. Third housing; 131. Base; 132. Support member; 133. Receiving cavity; 134. Fourth connecting structure; 200. Display assembly; 210. Dial structure; 220. Drive mechanism; 300. Measuring assembly; 310. Circuit board; 320. Electronic component. Detailed Implementation

[0045] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0047] In this document, the term "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.

[0048] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0049] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the power factor measuring device of this application.

[0050] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0051] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0052] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] Based on the above, this application provides a power factor measuring device.

[0054] To enable those skilled in the art to better understand the present application, the power factor measuring device provided in the example of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0055] For example, this application provides a power factor measurement device. Figure 1 A schematic diagram of a power factor measuring device is provided as an example of this application. Figure 2 An exploded structural diagram of a power factor measuring device provided as an example in this application. Figure 3 This application provides a schematic diagram of the internal structure of a power factor measuring device. Figure 4 for Figure 3 A magnified view of a portion of point A in the diagram. Figure 5 for Figure 3 A magnified view of a portion of point B in the diagram. Figure 6 This is a schematic diagram of the structure of a first shell provided as an example of this application.

[0056] Please refer to Figures 1-6The power factor measuring device includes a housing assembly 100, a measuring component 300, and a display component 200. The measuring component 300 is used to measure the power factor of the circuit under test, and the display component 200 is used to display the measurement results of the measuring component 300. The housing assembly 100 includes a first housing 110, a second housing 120, and a third housing 130.

[0057] The display component 200 is installed inside the first housing 110. The first housing 110 includes an integrally formed mounting part 111 and a blocking part 113. The mounting part 111 includes a first connecting structure 112. The blocking part 113 is used to block part of the display component 200. The mounting part 111 and the blocking part 113 cooperate to form a display window 114. The display window 114 is used to observe the display component 200.

[0058] The second housing 120 includes a second connecting structure 121 and a third connecting structure 122 spaced apart. Compared with the third connecting structure 122, the second connecting structure 121 is located closer to the first housing 110, and the second connecting structure 121 and the first connecting structure 112 are detachably connected.

[0059] The third housing 130 is located on the side of the second housing 120 away from the first housing 110. The third housing 130 includes a fourth connecting structure 134, which is detachably connected to the third connecting structure 122. The third housing 130 and the second housing 120 cooperate to form a mounting cavity, and the measuring component 300 is installed in the mounting cavity.

[0060] Please refer to Figure 2 The measuring component 300 may include an electrically connected circuit board 310 and electronic components 320. The circuit board 310 is electrically connected to the circuit under test. The circuit board 310 may be in the form of a regular shape such as a rectangle, circle, or triangle, or it may be in an irregular shape; this application example does not impose specific limitations in this regard.

[0061] Electronic component 320 may be the same as or different from electronic components in the prior art. This application example does not impose specific restrictions on this, as long as it can ensure that alternating current can be converted into direct current and can cooperate with display component 200 to display the power factor measurement results of the circuit.

[0062] The display component 200 may be the same as or different from the display components in the prior art. The specific structure of the display component 200 is not limited in the examples of this application.

[0063] The connection method between the display component 200 and the measurement component 300 is the same as the connection relationship between the display component and the measurement component in the prior art, and will not be described in detail here.

[0064] Regarding the first housing 110 in the housing assembly 100, the first housing 110 includes an integrally formed mounting portion 111 and a shielding portion 113. The mounting portion 111 includes a first connecting structure 112. The first connecting structure 112 can be a structure such as a snap-fit ​​or a slot, or it can be a structure such as a mounting hole. Multiple first connecting structures 112 can be provided at intervals.

[0065] The mounting part 111 can be a rectangular frame, a triangular frame, a circular frame, or other structures. This application example only describes the mounting part 111 as a rectangular frame.

[0066] The shielding part 113 may be a protrusion extending from one inner side wall of the mounting part 111, or the shielding part 113 may be a protrusion extending from two adjacent inner side walls of the mounting part 111. This application example does not specifically limit this.

[0067] The shielding part 113 can be in the form of a regular shape such as a triangle, rectangle, or fan, or it can be irregular.

[0068] The gap between the mounting part 111 and the shielding part 113 is the display window 114. The operator can observe the detection results of the display component 200 from the display window 114 to know the measurement results of the power factor measuring device on the circuit power factor.

[0069] The second housing 120 includes a second connecting structure 121 and a third connecting structure 122 spaced apart. Compared to the third connecting structure 122, the second connecting structure 121 is located closer to the first housing 110, which facilitates the detachable connection between the second connecting structure 121 and the first connecting structure 112.

[0070] The second connecting structure 121 corresponds to the first connecting structure 112. For example, if the first connecting structure 112 is a slot, the second connecting structure 121 can be a hook or a snap-fit. If the first connecting structure 112 is a mounting hole, the second connecting structure 121 can also be a mounting hole. The first connecting structure 112 and the second connecting structure 121 can be connected by bolts or other threaded fasteners. This application example does not limit the specific structure of the first connecting structure 112 and the second connecting structure 121, as long as the connection between the first housing 110 and the second housing 120 can be achieved through the first connecting structure 112 and the second connecting structure 121.

[0071] The third connecting structure 122 can be a snap-fit, a slot, or a mounting hole. Multiple third connecting structures 122 can be provided at intervals.

[0072] The fourth connection structure 134 is disposed on the third housing 130, and the fourth connection structure 134 is similar to the second connection structure 121.

[0073] The second housing 120 can be a hollowed-out columnar body, and the shape of the third housing 130 corresponds to the shape of the mounting part 111.

[0074] The third housing 130 is located on the side of the second housing 120 opposite to the first housing 110. The third housing 130 and the second housing 120 cooperate to form a mounting cavity, providing mounting space for the measuring component 300. Partially, the display component 200 may also be located within the mounting cavity formed by the second housing 120 and the third housing 130.

[0075] Compared to the prior art where the mounting part and the shielding part are separately arranged, in this application example, the mounting part 111 and the shielding part 113 are integrated, which can simplify the structure of the housing assembly 100 and improve the assembly efficiency of the housing assembly 100.

[0076] In this application example, the first housing 110 includes an integrally formed mounting portion 111 and a shielding portion 113. The mounting portion 111 includes a first connecting structure 112, which cooperates with a second connecting structure 121 disposed on the second housing 120 to achieve connection between the first housing 110 and the second housing 120. Along the direction from the first housing 110 to the second housing 120, the shielding portion 113 can shield part of the display component 200 to improve the aesthetic performance of the power factor measurement device.

[0077] The first housing 110, the second housing 120, and the third housing 130 work together to provide installation space for the measuring component 300 and the display component 200.

[0078] A first connecting structure 112 is disposed on the first housing 110, and a second connecting structure 121 is disposed on the second housing 120. The first housing 110 and the second housing 120 can be connected by the cooperation of the first connecting structure 112 and the second connecting structure 121. The second housing 120 is also provided with a third connecting structure 122, and the third housing 130 is provided with a fourth connecting structure 134. The second housing 120 and the third housing 130 can be connected by the cooperation of the third connecting structure 122 and the fourth connecting structure 134.

[0079] Based on the power factor measurement device provided in the above example, Figure 7 For a schematic diagram of a second shell provided as an example of this application, please refer to... Figure 4 , Figure 6 and Figure 7The first connecting structure 112 is a snap-fit ​​structure, and the second connecting structure 121 is a slot structure, with the snap-fit ​​structure snapping into the slot structure. Alternatively, the first connecting structure is a slot structure, and the second connecting structure is a snap-fit ​​structure, with the snap-fit ​​structure snapping into the slot structure.

[0080] When the first connecting structure 112 is a snap-fit ​​structure, one or more snap-fit ​​structures may be provided. Multiple snap-fit ​​structures may be provided on different side walls of the mounting portion 111, and the number of snap-fit ​​structures provided on each side wall may be equal or unequal.

[0081] In this application example, regardless of whether the first connecting structure 112 is a snap-fit ​​structure and the second connecting structure 121 is a slot structure, or whether the first connecting structure 112 is a slot structure and the second connecting structure 121 is a snap-fit ​​structure, the snap-fit ​​structure can engage with the slot structure to achieve the cooperation between the first housing 110 and the second housing 120.

[0082] Furthermore, in this application example, the connection between the first housing 110 and the second housing 120 is achieved by the snap-fit ​​of the slot structure and the snap-fit ​​structure. Compared with the connection between the first housing 110 and the second housing 120 by the bolt structure, the use of bolts or other threaded fasteners can be saved, thereby reducing the manufacturing cost of the power factor measuring device.

[0083] Based on the power factor measurement device provided in the example above, please refer to... Figure 6 and Figure 7 The first connecting structure 112 is provided at intervals, and the second connecting structure 121 corresponds to the first connecting structure 112.

[0084] When multiple first connecting structures 112 are provided, the multiple first connecting structures 112 are distributed at least on two opposite sidewalls of the mounting portion 111. The number of second connecting structures 121 is equal to the number of first connecting structures 112, and the positions of the second connecting structures 121 and the first connecting structures 112 correspond to those of the first connecting structures 112.

[0085] Based on this, the first connecting structure 112 can be connected to the second housing 120 from the two side walls opposite to the mounting part 111, so that the force applied to the first housing 110 by the multiple first connecting structures 112 is more uniform, thereby making the connection between the first housing 110 and the second housing 120 more reliable.

[0086] In this application example, multiple first connection structures 112 are spaced apart, and the second connection structure 121 corresponds to the first connection structure 112. The first connection structure 112 and the second connection structure 121 cooperate to connect the first housing 110 and the second housing 120 from different positions to ensure the reliability of the connection between the first housing 110 and the second housing 120.

[0087] Based on the power factor measurement device provided in the above example, Figure 8 Please refer to the structural schematic diagram of a third shell provided as an example in this application. Figure 5 , Figure 7 and Figure 8 The third connecting structure 122 is a snap-fit ​​structure, and the fourth connecting structure 134 is a slot structure, with the snap-fit ​​structure snapping into the slot structure. Alternatively, the third connecting structure 122 is a slot structure, and the fourth connecting structure 134 is a snap-fit ​​structure, with the snap-fit ​​structure snapping into the slot structure.

[0088] When the third connection structure 122 is a snap-fit ​​structure, one or more snap-fit ​​structures may be provided. Multiple snap-fit ​​structures may be provided on different side walls of the mounting part 111, and the number of snap-fit ​​structures provided on each side wall may be equal or unequal.

[0089] The third connecting structure 122 can be the same as the first connecting structure 112, or it can be different from the first connecting structure 112. The fourth connecting structure 134 changes with the third connecting structure 122. As long as the fourth connecting structure 134 cooperates with the third connecting structure 122, the connection between the third housing 130 and the second housing 120 can be achieved.

[0090] In this application example, regardless of whether the third connecting structure 122 is a snap-fit ​​structure and the fourth connecting structure 134 is a slot structure, or whether the third connecting structure 122 is a slot structure and the fourth connecting structure 134 is a snap-fit ​​structure, the snap-fit ​​structure can engage with the slot structure to achieve the cooperation between the second housing 120 and the third housing 130.

[0091] Furthermore, in this application example, the connection between the second housing 120 and the third housing 130 is achieved by the snap-fit ​​of the slot structure and the snap-fit ​​structure. Compared with the connection between the second housing 120 and the third housing 130 by the bolt structure, the use of threaded parts can be saved, further reducing the manufacturing cost of the power factor measuring device.

[0092] Based on the power factor measuring device provided in the above example, the power factor measuring device also includes a protective component (not shown in the figure), which is detachably mounted on the mounting part 111.

[0093] The protective component is a transparent and visible structural component. It can be made of glass, polymethyl methacrylate, polypropylene, transparent resin, or other materials, as long as the operator can observe the results of the display component 200 through the protective component.

[0094] The protective component can be connected to the first housing 110 by a snap or other means, so that the protective component can block the display window 114.

[0095] In this application example, by setting a protective component, the display window 114 can be blocked, reducing the possibility of dust, water and other impurities entering the power factor measuring device from the display window 114, thereby ensuring the reliability of the power factor measuring device and extending its service life.

[0096] Based on the power factor measurement device provided in the example above, please refer to... Figure 2 The display component 200 includes a drive mechanism 220 and a dial structure 210. The blocking part 113 is used to block the drive mechanism 220 along the direction from the first housing 110 to the second housing 120.

[0097] Please refer to Figure 4 and Figure 8 The third housing 130 includes an integrally formed base 131, a support member 132, and a receiving cavity 133. The base 131 has a fourth connecting structure 134 and is connected to the side of the second housing 120 opposite to the first housing 110. The base 131 is fixedly connected to the measuring assembly 300. The support member 132 is located on the side of the base 131 facing the second housing 120, extends into the second housing 120, and its end opposite to the base 131 is connected to the dial structure 210. The receiving cavity 133 is located on the side of the base 131 facing the second housing 120, and is spaced apart from the support member 132. The receiving cavity 133 is used to accommodate the drive mechanism 220.

[0098] The base 131 may have a protruding cylindrical structure on the side facing the first housing 110, with the opening of the cylindrical structure facing the first housing 110 and the inner cavity of the cylindrical structure being a receiving cavity 133.

[0099] Multiple fourth connecting structures 134 may be provided at intervals, and these multiple fourth connecting structures 134 may be provided on different side walls of the base 131. The number of fourth connecting structures 134 is equal to the number of third connecting structures 122, and the positions of the fourth connecting structures 134 correspond to the positions of the third connecting structures 122.

[0100] The base 131 and the measuring component 300 can be connected by threads or by snap-fit. This application example does not specifically limit the connection method between the base 131 and the measuring component 300, as long as the measuring component 300 can be fixedly connected to the base 131.

[0101] The support member 132 can be a raised columnar structure. The end of the support member 132 away from the base 131 can abut against the dial structure 210. The end of the support member 132 away from the base 131 can also be threaded to the dial structure 210. Alternatively, the end of the support member 132 away from the base 131 can also be connected to the instrument through the cooperation of the groove and the protrusion.

[0102] Multiple support members 132 can be provided at intervals, such as 2, 3, 4, etc. This application example does not make specific restrictions on this.

[0103] The opening of the receiving cavity 133 is located away from the base 131, and the drive mechanism 220 can be fixedly connected to the receiving cavity 133 by means of a threaded connection.

[0104] The shielding part 113 shields the drive mechanism 220 along the direction from the first housing 110 to the second housing 120, which can improve the aesthetic performance of the power factor measuring device.

[0105] Compared to the prior art where the base, support, and receiving cavity are separate components, in this application example, the base 131, support 132, and receiving cavity 133 are integrated, which can reduce the number of structural components of the power factor measuring device, reduce assembly steps, and improve the assembly efficiency of the power factor measuring device.

[0106] The threaded connection between different structural components mentioned in this application example is achieved by using combination screws with washers on existing production equipment to realize the automated threaded connection between different structural components. Compared with the prior art, which uses manual threading to realize the threaded connection between different structural components, it can save manpower and improve the assembly efficiency of the power factor measuring device.

[0107] Furthermore, in this application example, after the drive mechanism 220 is installed into the receiving cavity 133, the magnetization operation of the drive mechanism 220 can also be achieved by using existing automated equipment to automate the magnetization of the drive mechanism 220, thereby further improving the assembly efficiency of the power factor measurement device.

[0108] Based on the power factor measurement device provided in the example above, please refer to... Figure 8 The support member 132 is provided at intervals of three, and the three support members 132 are arranged near different side walls of the base 131.

[0109] The receiving cavity 133 may be located near one side wall of the base 131, and the three support members 132 may be located near the other three side walls of the base 131.

[0110] The three spaced-apart support members 132 can support the dial structure 210 from different positions, ensuring the reliability of the connection between the dial structure 210 and the base 131 and reducing the amplitude of the sway of the dial structure 210 relative to the housing assembly 100.

[0111] Based on the power factor measuring device provided in the above example, the measuring component 300 includes an electrically connected circuit board 310 and electronic components 320, with the circuit board 310 spaced apart from a plurality of supports 132 and a receiving cavity 133.

[0112] In this application example, electronic component 320 may be the same as or different from electronic components in the prior art. Please refer to the following description of electronic component 320.

[0113] The shape of the circuit board 310 can be the same as the shape of the base 131, or the shape of the circuit board 310 can be different from the shape of the base 131.

[0114] The circuit board 310 can be in contact with the base 131, or the circuit board 310 can be spaced apart from the base 131.

[0115] In this application example, the circuit board 310 is spaced apart from the multiple supports 132 and the receiving cavity 133, which can reduce the possibility of the circuit board 310 abutting against the supports 132 and the receiving cavity 133, thereby reducing the possibility that the connection between the circuit board 310 and the electronic component 320 will be unreliable due to the abutment between the circuit board 310 and the supports 132 and the receiving cavity 133.

[0116] Next, electronic component 320 will be described by way of example. Please refer to... Figure 2 Electronic component 320 includes a potentiometer and an electrolytic capacitor electrically connected, with the potentiometer having a resistance range of 0~200kΩ. The remaining electronic components 320 are the same as those in the prior art, and their connections are identical.

[0117] Compared to the prior art, which uses a potentiometer with a resistance range of 0~20kΩ connected in series with a metal film resistor to limit the circuit current, this application example directly uses a potentiometer with a resistance range of 0~200kΩ to limit the circuit current, which can save one metal film resistor. This reduces the number of electronic components 320 connected to the circuit board 310, eliminates the redundant structure of the circuit board 310, and saves the manufacturing cost of the power factor measurement device.

[0118] Based on the power factor measuring device provided in the above example, the potentiometer includes a first resistor and a second resistor connected in series.

[0119] The resistance values ​​of the first resistor and the second resistor can be the same, or they can be different.

[0120] For example, the resistance of the first resistor can be 100kΩ, and the resistance of the second resistor can also be 100kΩ. Alternatively, the resistance of the first resistor can be 110kΩ, and the resistance of the second resistor can be 90kΩ. This application does not specifically limit the resistance values ​​of the first and second resistors, as long as the series connection of the first and second resistors reaches 200kΩ to achieve the current limiting effect on the circuit.

[0121] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power factor measuring device, characterized in that, The device includes a housing assembly, a measuring assembly, and a display assembly. The measuring assembly is used to measure the power factor of the circuit under test, and the display assembly is used to display the measurement results of the measuring assembly. The housing assembly includes: A first housing, in which at least a portion of the display components are mounted, the first housing includes an integrally formed mounting portion and a shielding portion, the mounting portion includes a first connecting structure, the shielding portion is used to shield a portion of the display components, the mounting portion and the shielding portion cooperate to form a display window, the display window is used to observe the display components; The second housing includes a second connecting structure and a third connecting structure spaced apart. The second connecting structure is located closer to the first housing than the third connecting structure, and the second connecting structure is detachably connected to the first connecting structure. A third housing is disposed on the side of the second housing opposite to the first housing. The third housing includes a fourth connecting structure, which is detachably connected to the third connecting structure. The third housing and the second housing cooperate to form a mounting cavity, and the measuring component is installed into the mounting cavity.

2. The power factor measuring device according to claim 1, characterized in that, The first connecting structure is a snap-fit ​​structure, and the second connecting structure is a slot structure, wherein the snap-fit ​​structure snaps into the slot structure; or... The first connecting structure is a slot structure, and the second connecting structure is a snap-fit ​​structure, wherein the snap-fit ​​structure is snapped into the slot structure.

3. The power factor measuring device according to claim 1 or 2, characterized in that, The first connection structure is provided at multiple intervals, and the second connection structure corresponds to the first connection structure.

4. The power factor measuring device according to claim 1, characterized in that, The display component includes a driving mechanism and a dial structure, and the blocking part blocks the driving mechanism along the direction from the first housing to the second housing; The third housing includes an integrally formed base, a support member, and a receiving cavity; The base is provided with the fourth connection structure, the base is connected to the side of the second housing opposite to the first housing, and the base is fixedly connected to the measuring component; The support member is located on the side of the base facing the second housing, the support member extends into the second housing, and the end of the support member away from the base is connected to the dial structure; The receiving cavity is located on the side of the base facing the second housing, and the receiving cavity is spaced apart from the support member. The receiving cavity is used to accommodate the drive mechanism.

5. The power factor measuring device according to claim 4, characterized in that, The support members are arranged at intervals of three, and the three support members are arranged near different side walls of the base.

6. The power factor measuring device according to claim 4, characterized in that, The measuring assembly includes an electrically connected circuit board and electronic components, with the circuit board spaced apart from the plurality of supports and the receiving cavity.

7. The power factor measuring device according to claim 6, characterized in that, The electronic component includes a potentiometer and an electrolytic capacitor that are electrically connected, and the resistance of the potentiometer is in the range of 0 to 200 kΩ.

8. The power factor measuring device according to claim 7, characterized in that, The potentiometer includes a first resistor and a second resistor connected in series.

9. The power factor measuring device according to any one of claims 4-6, characterized in that, The third connecting structure is a snap-fit ​​structure, and the fourth connecting structure is a slot structure, with the snap-fit ​​structure snapping into the slot structure; or... The third connecting structure is a slot structure, and the fourth connecting structure is a snap-fit ​​structure, which snaps into the slot structure.

10. The power factor measuring device according to claim 1, characterized in that, It also includes a protective component, which is detachably installed on the mounting portion.

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