Household single-phase plug gauge

Abstract

The utility model discloses a household single-phase plug gauge which comprises a gauge body, the gauge body is provided with a through hole which can be sleeved on a plug pin of a plug in a matching manner, the lower surface of the gauge body is a plane which is used for flatly leaning against the plug, and the lower surface of the gauge body is provided with a distance reference line corresponding to the through hole. The distance between the distance reference line and the edge of the through hole is the minimum distance from the plug pin to the edge of the plug specified in the standard, and the upper surface of the gauge body is provided with at least one pair of reference planes with height difference. The distance between the lower reference plane in each pair and the lower surface of the gauge body is the minimum value of the effective length of the bolt specified in the standard, and the distance between the higher reference plane in each pair and the lower surface of the gauge body is the maximum value of the effective length of the bolt specified in the standard. The device is convenient to use, and can improve the measurement efficiency and save the measurement cost.

Description

Technical Field

[0001] The utility model relates to a special gauge for a plug, in particular to a household single-phase plug gauge. Background Art

[0002] Single-phase plugs and sockets for household and similar purposes are widely used electrical connectors and are closely related to people's livelihood security and the safety of life and property. Therefore, they are also included in my country's compulsory certification product catalog. They must meet relevant standard requirements and obtain compulsory certification certificates before they can be put on the market.

[0003] Among the factors that affect the safety of plugs and sockets, the most critical factor is the type and size of plugs and sockets. my country's current national standard GB / T 1002-2021 "Types, basic parameters and dimensions of single-phase plugs and sockets for household and similar purposes" clearly stipulates the types, basic parameters and dimensions of single-phase plugs with an AC frequency of 50Hz, a rated voltage of 250V and a rated current not exceeding 16A for use in homes and similar household environments (see Figure 9 、 Figure 10 , Table 1, Table 2, where Figure 9 Table 1 shows the type, basic parameters and dimensions of single-phase two-pole plugs. Figure 10 and Table 2 show the types, basic parameters and dimensions of single-phase two-pole grounding plugs). The standard also provides the structural diagram and basic parameters of the gauge used to check the plug size (see Figure 11 、 Figure 12 , Table 3, Table 4, among which Figure 11 Table 3 shows the structure diagram and parameter basis of the gauge used to measure single-phase two-pole plugs. Figure 12 Table 4 shows the structure diagram and parameter basis of the gauge for measuring single-phase two-pole grounded plugs).

[0004] Table 1

[0005]

[0006]

[0007] Table 2

[0008]

[0009] Table 3

[0010]

[0011] Note: φ7 and D are reference dimensions.

[0012] Table 4

[0013]

[0014] Note: φ7 and D are reference dimensions.

[0015] However, the single-phase plug gauges in existing standards only measure the distance between the plug's opening and the width and thickness of the flat pin; they cannot measure the effective length of the pin. According to the technical explanation of the Electrical Accessories Standardization Committee, the effective length (E, C) of a single-phase plug pin refers to the effective length from the contact surface of the plug with the socket to the top of the pin. Currently, most plugs on the market feature a protruding molded mark, while some also feature a raised outer edge on the mating surface. For these plugs, the raised molded mark or raised outer edge first contacts the socket surface, reducing the effective insertion length of the metal pin. For these plugs, using a vernier caliper requires measuring the length of the pin itself and then subtracting the height of the raised molded mark or raised edge. Due to the small height of the raised molded mark or raised edge, the vernier caliper cannot achieve the required measurement accuracy, and the double measurement magnifies the error, reducing accuracy. Using a coordinate measuring machine or optical projector for measurement offers high accuracy, but the measurement process is cumbersome, requiring a high level of testing environment and operator expertise, resulting in low efficiency and high cost.

[0016] Therefore, it is necessary to propose a gauge that can have the uses of existing standard gauges and can improve the efficiency of measuring the effective length of the pin. Utility Model Content

[0017] The utility model aims to provide a household single-phase plug gauge, which is easy to use, can improve measurement efficiency and save measurement costs.

[0018] The purpose of this utility model is achieved through the following technical solutions:

[0019] A household single-phase plug gauge, characterized in that: it includes a gauge body, the gauge body is provided with a through hole that can be fitted onto the pin of the plug, the lower surface of the gauge body is a plane for resting flat on the plug, the lower surface of the gauge body is provided with a distance reference line corresponding to the through hole, the distance between the distance reference line and the edge of the through hole is the minimum distance from the pin to the edge of the plug specified in the standard, the upper surface of the gauge body is provided with at least one pair of reference planes with a height difference, the distance between the lower reference plane in each pair and the lower surface of the gauge body is the minimum effective length of the pin specified in the standard, and the distance between the higher reference plane in each pair and the lower surface of the gauge body is the maximum effective length of the pin specified in the standard.

[0020] A further technical solution of the present invention is that the gauge body is cylindrical.

[0021] A further technical solution of the present utility model is as follows: a household single-phase plug gauge includes a gauge body for measuring a single-phase two-pole plug, two through holes for sleeved on the plugs connected to the two poles are correspondingly provided on the gauge body, a pair of reference planes with a height difference are provided on the upper surface of the gauge body, and a dividing line between the pair of reference planes corresponds to the position of the through holes.

[0022] A further technical solution of the present utility model is as follows: a household single-phase plug gauge includes a gauge body for measuring a single-phase two-pole grounded plug, two through holes for being sleeved on a plug connected to the two poles and one through hole for being sleeved on a grounded plug are correspondingly provided on the gauge body, and two pairs of reference planes with a height difference are provided on the upper surface of the gauge body; the dividing line of one pair of reference planes corresponds to the position of the through holes for being sleeved on the plug connected to the two poles, and is used for measuring the effective length of the plug connected to the two poles; the dividing line of the other pair of reference planes corresponds to the position of the through holes for being sleeved on the grounded plug, and is used for measuring the effective length of the grounded plug.

[0023] A further technical solution of the present invention is that distance reference lines are provided on the edges of the lower surface of the gauge body corresponding to the two through holes for sleeved on the two stages.

[0024] A further technical solution of the present invention is that the cross-section of the through hole is rectangular.

[0025] A further technical solution of the present invention is: a first reference line and a second reference line are provided for the distance reference line, the first reference line and the second reference line are respectively parallel to the long side and the short side of the rectangular through hole, and the first reference line and the second reference line are connected by an arc line.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. After the utility model is plugged into the plug, the effective length of the plug pin can be directly measured through the gauge body. By observing the positional relationship between the top of the plug pin and the reference plane with a height difference on the upper surface of the gauge body, it can be intuitively known whether the effective length of the plug pin meets the standard requirements.

[0028] 2. The utility model directly contacts the plug through the lower surface of the gauge body, and can cover the outer edges of most plugs on the market. Even if the raised molded mark or raised outer edge on the plug affects the effective length of the plug, the utility model can still directly determine whether the effective length of the plug is qualified without the need for multiple measurements and calculations.

[0029] 3. The present invention provides a distance reference line, through which it is possible to directly observe whether the distance between the plug pin and the plug edge meets the minimum distance specified in the standard.

[0030] It can be seen that the utility model can quickly measure the effective length of the plug pin and the distance between the pin and the edge of the plug to determine whether it meets the requirements of the standard. The measurement is convenient, the measurement efficiency is improved, and the labor cost and tool cost of the measurement are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a bottom view schematic diagram of a gauge body for measuring a single-phase two-pole plug according to the first embodiment of the present invention;

[0032] Figure 2 This is a schematic top view of a gauge body for measuring a single-phase two-pole plug according to the first embodiment of the present invention;

[0033] Figure 3 This is a schematic cross-sectional view of a gauge body for measuring a single-phase two-pole plug according to the first embodiment of the present invention;

[0034] Figure 4 This is a schematic structural diagram of the gauge body of the first embodiment of the present utility model when measuring a single-phase two-pole plug;

[0035] Figure 5 This is a bottom view schematic diagram of a gauge body for measuring a single-phase two-pole grounded plug according to a second embodiment of the present invention;

[0036] Figure 6 This is a schematic top view of a gauge body for measuring a single-phase, two-pole, grounded plug according to a second embodiment of the present invention;

[0037] Figure 7 This is a schematic cross-sectional view of a gauge body for measuring a single-phase, two-pole, grounded plug according to a second embodiment of the present invention;

[0038] Figure 8 This is a schematic structural diagram of the gauge body of the second embodiment of the present utility model when measuring a single-phase two-pole grounded plug;

[0039] Figure 9 This is a schematic diagram of the structure of a single-phase two-pole plug in the standard;

[0040] Figure 10 This is a schematic diagram of the structure of a single-phase, two-pole, grounded plug in the standard;

[0041] Figure 11 This is a schematic diagram of the structure of the gauge used in the standard to measure single-phase two-pole plugs;

[0042] Figure 12 This is a schematic diagram of the structure of the gauge used in the standard to measure single-phase two-pole grounded plugs.

[0043] Meaning of the reference numerals in the figure:

[0044] 1- Gauge body; 1.1- Lower surface of the gauge body; 1.2- Upper reference plane; 1.3- Lower reference plane; 2- Through hole; 3- Distance reference line; 3.1- First reference line; 3.2- Second reference line; 3.3- Arc line; 4- Dividing line; 5- Single-phase two-pole plug; 5.1- Raised molded mark; 5.2- Raised outer edge; 6- Pin connected to the two poles; 7- Single-phase two-pole plug with grounding; 8- Grounding pin. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the embodiments.

[0046] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0047] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0048] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0049] Example 1:

[0050] like Figures 1 to 3 The household single-phase plug gauge of this embodiment is shown, which includes a gauge body 1 for measuring a single-phase two-pole plug 5. The single-phase two-pole plug 5 refers to a plug with two pins connected to two poles respectively, and does not have a grounding pin, where the two poles refer to the L and N poles.

[0051] like Figure 1As shown, the gauge body 1 is cylindrical and has two through holes 2 formed thereon. The through holes 2 extend through the gauge body 1 vertically. The two through holes 2 are parallel and perpendicular to the lower surface 1.1 of the gauge body. The through holes 2 are larger than the cross section of the plug and are used to fit over the plug 6 of the plug that connects the two stages. The cross section of the through hole 2 is rectangular with a long side and a short side. The long side dimension (b pg ) and short side dimension (t pg ) and the relative position of the two through holes (F pg ) are the same as the existing standard gauges, i.e. Figure 11 and the dimensions shown in Table 3.

[0052] The upper surface of the gauge body 1 is provided with a pair of reference planes 1.2 and 1.3, with a height difference: a higher reference plane 1.2 and a lower reference plane 1.3. Both reference planes 1.2 and 1.3 are semicircular in shape, with a dividing line 4 between the pair of reference planes 1.2 and 1.3 corresponding to the center of the through-hole 2. The distance between the lower reference plane 1.3 and the lower surface 1.1 of the gauge body corresponds to the minimum effective length of the latch specified in the standard, while the distance between the higher reference plane 1.2 and the lower surface 1.1 of the gauge body corresponds to the maximum effective length of the latch specified in the standard. In other words, the vertical distance between the pair of reference planes 1.2 and 1.3 represents the allowable range of the effective length of the latch.

[0053] The lower surface 1.1 of the gauge body is a circular plane for lying flat on the plug. As the plug-fitting surface, its area is large enough to cover the outer edge of most plugs. A distance reference line 3 is provided on the lower surface 1.1 of the gauge body corresponding to the through hole. The distance reference line 3 of this embodiment is provided with a first reference line 3.1 and a second reference line 3.2. The first reference line 3.1 and the second reference line 3.2 are respectively parallel to the long side and the short side of the rectangular through hole 2. The first reference line 3.1 and the second reference line 3.2 are connected by a quarter-circle arc line 3.3. The distance between the distance reference line 3 and the edge of the corresponding through hole 2 is the minimum distance from the pin to the edge of the plug specified in the standard. The minimum distance from the pin to the edge of the plug specified in the standard is 6.5 mm.

[0054] The specific dimensions may be: the length of the first reference line 3.1 is The distance between the long side of the corresponding through hole 2 is 6.5±0.02 mm, and the length of the second reference line 3.2 is The distance between the arc line 3.3 and the short side of the corresponding through hole 2 is also 6.5±0.02 mm, the radius of the arc line 3.3 is 6.5±0.02 mm, and the width of the distance reference line 3 is 0.02 mm.

[0055] The specific dimensions of the gauge body 1 for measuring a single-phase two-pole plug in this embodiment are shown in the following table. Figure 1and Figure 3 The size identification letters of the gauge body 1 used to measure single-phase two-pole plugs are marked in the figure, and the size information of the corresponding identification letters is as follows in Table 5:

[0056] Table 5

[0057]

[0058] The household single-phase plug gauge of this embodiment is made of DC53 steel.

[0059] The process of measuring a single-phase two-pole plug using the household single-phase plug gauge of this embodiment is as follows:

[0060] like Figure 4 As shown, the through hole 2 of the gauge body 1 is placed over the pin 6 of a corresponding single-phase, two-pole plug 5, connecting the two poles. The lower surface 1.1 of the gauge body rests flat against the plug. If the plug's mating surface is provided with a raised molded mark 5.1 and / or a raised outer edge 5.2, the lower surface 1.1 of the gauge body will rest against the raised molded mark 5.1 and / or raised outer edge 5.2. The positional relationship between the pin and a pair of reference planes 1.2 and 1.3 of the gauge body is then directly observed. If the top of the pin is above the lower reference plane 1.3 and below the upper reference plane 1.2, the effective length of the pin meets the standard requirements. This indicates that the household single-phase plug gauge of this embodiment can measure the effective length of the plug regardless of whether the plug's mating surface has a raised molded mark 5.1 and / or a raised outer edge 5.2.

[0061] When measuring the distance between the pin and the edge of the plug, the pin is aligned with the outer wall of the through hole or the outer right angle. The distance reference line 3 on the lower surface of the gauge body can be used to determine whether the distance between the pin and the edge of the plug meets the standard requirement of not less than 6.5mm as required by the GB / T 1002-2021 standard. If the distance reference line 3 is blocked by the plug, it means the standard is met. If the distance reference line 3 is visible and not blocked by the plug, it means the standard is not met. This measurement is efficient and intuitive.

[0062] Example 2:

[0063] like Figures 5 to 7 As shown, the household single-phase plug gauge of embodiment 2 includes a gauge body 1 for measuring a single-phase two-pole grounded plug. The single-phase two-pole grounded plug 7 refers to a plug having two pins 6 connected to the two poles respectively and a grounding pin 8. The length of the grounding pin 8 is greater than the length of the two pins connected to the two poles respectively, where the two poles are L and N poles.

[0064] like Figure 5As shown, the gauge body 1 is provided with three through holes 2, which pass through the gauge body 1 vertically and are perpendicular to the lower surface 1.1 of the gauge body. Two of the through holes 2 are used to be sleeved on the pins 6 connected to the two stages, and the third through hole 2 is used to be sleeved on the grounding pin 8. The cross-sectional shape of the through hole 2 is also rectangular, with a long side and a short side. The long side dimension (b pg ) and the short side (t pg ) size and the relative position of the two through holes (A pg 、F pg 、J pg ) are the same as the existing standard gauges, i.e. Figure 12 and the dimensions shown in Table 4.

[0065] The upper surface of the gauge body 1 is provided with two pairs of reference planes 1.2 and 1.3 at different heights, forming four pairs of reference planes. The dividing line 4 of one pair of reference planes corresponds to the position of the through-hole 2 for fitting over the pin 6 connecting the two stages, and is used to measure the effective length of the pin 6 connecting the two stages. The dividing line 4 of the other pair of reference planes corresponds to the center of the through-hole 2 for fitting over the grounding pin 8, and is used to measure the effective length of the grounding pin 8.

[0066] The two pairs of reference planes include a lower reference plane 1.3 and an upper reference plane 1.2 respectively. The measurement principle of the effective length of the pin by the two pairs of reference planes is the same as the measurement principle of the first embodiment.

[0067] The lower surface 1.1 of the gauge body is a circular surface designed to rest flat against the plug. Distance reference lines 3 are provided on the lower surface 1.1, corresponding to the two through-holes 2 that fit over the plug pins 6 connecting the two stages. These two distance reference lines 3 are designated as a first reference line 3.1 and a second reference line 3.2. These first and second reference lines 3.1 and 3.2 are parallel to the long and short sides of the rectangular through-holes 2, respectively. A quarter-circle arc 3.3 connects the first and second reference lines 3.1 and 3.2. The distance between the distance reference lines 3 and the edge of the corresponding through-hole 2 is the minimum distance specified in the standard for a plug pin to the edge of the plug.

[0068] The specific dimensions may be: the length of the first reference line 3.1 is The distance between the long side of the corresponding through hole 2 is 6.5±0.02 mm, and the length of the second reference line 3.2 is The distance between the arc line 3.3 and the short side of the corresponding through hole 2 is also 6.5±0.02 mm, and the radius of the arc line 3.3 is 6.5±0.02 mm.

[0069] Since the single-phase two-pole grounded plug in the standard GB / T 1002-2021 is divided into two different sizes according to the rated current ≤10A and the rated current 16A, the gauge body of this embodiment also has two different sizes. Figure 5 and Figure 7 The size identification letters of the gauge body are marked in the figure, and the size information of the corresponding identification letters is shown in Table 6 below:

[0070] Table 6

[0071]

[0072] The household single-phase plug gauge of this embodiment is made of DC53 steel.

[0073] The process of using the measuring gauge of this embodiment is as follows:

[0074] When measuring single-phase two-pole grounding plugs 7 of different types and sizes, use the corresponding gauge. For example, when measuring single-phase two-pole grounding plugs 7 with a rated current of ≤10A, use the gauge for ≤10A single-phase two-pole grounding plugs. Figure 8 As shown, the gauge body 1 is placed over the pin of a corresponding single-phase, two-pole, grounded plug 7, with the lower surface 1.1 of the gauge body resting flat against the plug. If the plug's mating surface is provided with a raised molded mark 5.1 and / or a raised outer edge 5.2, the lower surface 1.1 of the gauge body will rest against the raised molded mark 5.1 and / or raised outer edge 5.2. The positional relationship between the grounded pin and the corresponding pair of reference planes 1.2 and 1.3 is then directly observed. The measurement principle is the same as that of Example 1.

[0075] The same applies to the measurement of the effective length of the pin 6 connected to the two poles. In addition, the measurement method for measuring whether the distance from the pin to the edge of the plug meets the standard is also the same as the measurement principle of the first embodiment.

[0076] In actual use, the user can purchase the gauge bodies of the first embodiment and the second embodiment at the same time, so as to select the required gauge according to the plug to be measured.

[0077] The utility model can smoothly measure all types of plugs specified in the standard GB / T 1002-2021, namely, single-phase two-pole plugs for household and similar purposes, and single-phase two-pole grounded 10A and 16A plugs for household and similar purposes, and can completely replace the plug gauges in the existing standards.

[0078] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the implementation methods of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structure of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in this field, without departing from the above basic technical ideas of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A household single-phase plug gauge, characterized by: The gauge body comprises a through hole which can be fitted onto the pin of the plug, the lower surface of the gauge body being a plane for resting flatly on the plug, the lower surface of the gauge body being provided with a distance reference line corresponding to the through hole, the distance between the distance reference line and the edge of the through hole being the minimum distance from the pin to the edge of the plug specified in the standard, the upper surface of the gauge body being provided with at least one pair of reference planes with a height difference, the distance between the lower reference plane in each pair and the lower surface of the gauge body being the minimum value of the effective length of the pin specified in the standard, and the distance between the higher reference plane in each pair and the lower surface of the gauge body being the maximum value of the effective length of the pin specified in the standard.

2. The household single-phase plug gauge according to claim 1, characterized in that: The gauge body is cylindrical in shape.

3. The household single-phase plug gauge according to claim 1, characterized in that: The household single-phase plug gauge includes a gauge body for measuring single-phase two-pole plugs. The gauge body is correspondingly provided with two through holes for being sleeved on the plugs connected to the two poles. The upper surface of the gauge body is provided with a pair of reference planes with a height difference, and the dividing line between the pair of reference planes corresponds to the position of the through holes.

4. The household single-phase plug gauge according to claim 1, characterized in that: The household single-phase plug gauge includes a gauge body for measuring single-phase two-pole grounded plugs. The gauge body is correspondingly provided with two through holes for being sleeved on the plugs connected to the two poles and one through hole for being sleeved on the grounded plug. The upper surface of the gauge body is provided with two pairs of reference planes with a height difference; the dividing line of one pair of reference planes corresponds to the position of the through holes for being sleeved on the plugs connected to the two poles, and is used to measure the effective length of the plugs connected to the two poles; the dividing line of the other pair of reference planes corresponds to the position of the through holes for being sleeved on the grounded plug, and is used to measure the effective length of the grounded plug.

5. The household single-phase plug gauge according to claim 3 or 4, characterized in that: The lower surface of the gauge body is provided with distance reference lines corresponding to the two edges of the through holes for being sleeved on the two stages.

6. The household single-phase plug gauge according to claim 1, characterized in that: The cross-section of the through hole is rectangular.

7. The household single-phase plug gauge according to claim 6, characterized in that: The distance reference line is provided with a first reference line and a second reference line, the first reference line and the second reference line are respectively parallel to the long side and the short side of the rectangular through hole, and the first reference line and the second reference line are connected by an arc line.

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