multimeter, multimeter (mm)

Abstract

The utility model belongs to the technical field of measuring tool, disclose a kind of multimeter, including multimeter body, shell, input terminal and control part. Base is provided in shell, a plurality of second pole pieces are provided on base, and a plurality of second pole pieces are one-to-one corresponding with a plurality of input terminals of multimeter body. Input terminal is used to be connected with meter pen. Control part is movably arranged on shell, to selectively electrically connect one of a plurality of second pole pieces with input terminal. The utility model is provided with base on shell, input terminal and a plurality of second pole pieces are provided on base, and a plurality of second pole pieces correspond to the different input terminals of multimeter. Control part is movably arranged on shell and selectively connected with one of a plurality of second pole pieces, so that different second pole pieces are connected by the mode of moving or rotating control part, the change of detection electric parameter or range is realized, repeated plugging meter pen is avoided, and test efficiency is improved and use experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of measuring tools, and in particular to a multimeter. Background Technology

[0002] A multimeter, also known as a multi-meter, is an indispensable measuring instrument in the power electronics and other related industries. Its primary purpose is to measure voltage, current, and resistance. Multimeters are classified into analog multimeters and digital multimeters based on their display method, and are multi-functional, multi-range measuring instruments.

[0003] To prevent dust and debris from easily entering the jacks and damaging the wiring when changing electrical parameters (such as resistance and current) or measuring ranges, existing multimeters have implemented measures to avoid this.

[0004] Therefore, a multimeter is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a multimeter to solve the technical problem in the prior art where the control component is located between two electrical parameter connection terminals, causing the multimeter to be unusable.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A multimeter includes:

[0008] Multimeter body and casing;

[0009] A base is disposed inside the outer casing, and a plurality of second pole pieces are disposed on the base, each of the plurality of second pole pieces corresponding one-to-one with a plurality of input terminals of the multimeter body;

[0010] Input terminals are used to connect to the meter probes;

[0011] A control element, movably disposed on the housing, is provided to selectively electrically connect one of a plurality of second pole pieces to the input terminal.

[0012] Optionally, the control element slides against the input terminal, and a guide element is provided on the base, the guide element being disposed between two adjacent second pole pieces; when the control element moves, the guide element causes the control element to tend to connect with the second pole piece.

[0013] Optionally, the control element slides against the input terminal, a limiting portion is provided on the second electrode, and an elastic structure is provided on the control element. When the control element is connected to the second electrode, the elastic structure is located at the limiting portion.

[0014] Optionally, the control element includes a sliding element and a pushing element;

[0015] The outer shell is provided with a sliding groove, and the sliding member is slidably disposed in the sliding groove;

[0016] The input terminal includes a first electrode that is spaced apart from the second electrode;

[0017] The pusher is located outside the housing and connected to the slider; the slider is provided with a first connector, which can selectively connect one of a plurality of second pole pieces to the first pole piece, and the elastic structure is connected to the first connector.

[0018] Optionally, one of the sliding member and the pushing member is provided with a locking block, and the other is provided with a locking groove. When the locking block is located in the locking groove, the pushing member is engaged with the sliding member.

[0019] Optionally, one of the pushing member and the sliding member is provided with a connecting post, and the other is provided with a connecting hole, wherein the connecting post can be inserted into the connecting hole.

[0020] Optionally, the input terminal includes a first plug socket fixedly connected to the push member, the bottom wall and / or side wall of the first plug socket being electrically connected to the input terminal of the multimeter body through the relief electrode, and the first plug socket being used to engage with the plug of the test leads.

[0021] Optionally, the control element includes a knob and a rotating element; the housing has a mounting hole, the knob passes through the mounting hole and is connected to the rotating element, the rotating element is electrically connected to the input terminal, and can optionally be electrically connected to one of a plurality of second pole pieces.

[0022] Optionally, the input terminal includes a second connector connected to the knob, the second connector being electrically connected to the second electrode.

[0023] Optionally, the surface of the control element is provided with anti-slip texture.

[0024] The beneficial effects of this utility model are:

[0025] The multimeter proposed in this invention features a base within its casing, on which input terminals and multiple second electrodes are mounted. These second electrodes correspond to different input terminals of the multimeter. A control element is movably mounted on the casing and can be selectively connected to one of the multiple second electrodes. This allows for the connection of different second electrodes by moving or rotating the control element, enabling changes in the detected electrical parameters or measurement range. This avoids repeatedly plugging and unplugging the test leads, improving testing efficiency and enhancing the user experience. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a front view of the multimeter provided in Embodiment 1 of this utility model;

[0028] Figure 2 yes Figure 1 Sectional view along AA;

[0029] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0030] Figure 4 This is a right view of the multimeter provided in Embodiment 1 of this utility model;

[0031] Figure 5 yes Figure 4 Cross-sectional view along CC;

[0032] Figure 6 yes Figure 5 Enlarged view at point D;

[0033] Figure 7 This is an exploded view of the control component provided in Embodiment 1 of this utility model;

[0034] Figure 8 This is a schematic diagram of the structure of the multimeter provided in Embodiment 2 of this utility model;

[0035] Figure 9 This is a front view of the multimeter provided in Embodiment 3 of this utility model;

[0036] Figure 10 yes Figure 9 Sectional view along EE;

[0037] Figure 11 yes Figure 10 Enlarged view of point F in the middle.

[0038] In the picture:

[0039] 1. Outer shell; 11. Base; 111. First pole piece; 112. Second pole piece; 1121. Limiting part; 113. Guide piece; 12. Third connector; 13. Fourth connector;

[0040] 2. Control components; 21. Elastic structure;

[0041] 22. Pushing component; 221. Locking block; 222. Connecting post; 223. First insertion socket;

[0042] 23. Sliding component; 231. Slot; 232. Connecting boss; 233. Connecting hole;

[0043] 24. Knob; 241. Second connector;

[0044] 25. Rotating component; 251. Second connecting component. Detailed Implementation

[0045] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0046] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Example 1

[0049] like Figures 1 to 7As shown, this embodiment discloses a multimeter, including a multimeter body, a housing 1, input terminals, and a control component 2. The housing 1 contains a base 11, on which multiple second electrodes 112 are disposed. The input terminals include first electrodes 111 spaced apart from the second electrodes 112. The multimeter also includes first and second probes. The first electrodes 111 are electrically connected to the cables of the first probes. The first probe is typically a red probe, and the second probe is typically a black probe. The second probe is directly connected to a common terminal of the multimeter body.

[0050] The control element 2 is movably mounted on the housing 1. One end of the control element 2 can extend into the housing 1 and slide against the first electrode 111 and the second electrode 112. It can also selectively connect one of the multiple second electrodes 112 to the first electrode 111.

[0051] It is understood that in the multimeter provided in this embodiment, multiple second electrodes 112 correspond one-to-one with multiple input terminals of the multimeter body, i.e., different ranges, such as resistance measurement range, mA current measurement range, 10A current measurement range, voltage measurement range, etc. By using the movable control unit 2, different second electrodes 112 are connected to the first electrode 111, thereby connecting the input probes to the required input terminals of the multimeter body, realizing the detection of electrical parameters or changes in measurement range. This setup avoids repeatedly plugging and unplugging the probes.

[0052] Furthermore, in this embodiment, a limiting portion 1121 is provided on the second electrode 112, and an elastic structure 21 is provided on the control member 2. When the control member 2 is connected to the second electrode 112, the elastic structure 21 is located at the limiting portion 1121.

[0053] Specifically, such as Figure 3 and Figure 5 As shown, the limiting part 1121 is an arc-shaped notch provided on the second electrode 112, and the elastic structure 21 is a convex arc-shaped spring piece provided on the control member 2. When the control member 2 moves to a certain second electrode 112, the spring piece can push into the arc-shaped notch of the second electrode 112, thereby preventing the control member 2 from moving relative to the second electrode 112, ensuring a stable connection between the control member 2 and the second electrode 112, and thus ensuring the normal detection of the multimeter.

[0054] Furthermore, a guide member 113 is provided on the base 11, and the guide member 113 is disposed between two adjacent second pole pieces 112. The top surface of the guide member 113 is convex arc-shaped, and its edge is flush with the edge of the adjacent limiting part 1121. When the control member 2 moves or rotates on the housing 1, the guide member 113 makes the control member 2 tend to connect with the second pole piece 112, so that the control member 2 is driven by the guide member 113 towards the second pole piece 112, ensuring that the control member 2 is located at the second pole piece 112 and connected to the second pole piece 112 when stationary. This not only facilitates the adjustment of the position of the control member 2, but also ensures that the multimeter can perform normal testing.

[0055] Furthermore, in this embodiment, the control element 2 includes a pushing member 22 and a sliding member 23. A groove is provided on the outer casing 1, and the sliding member 23 is slidably disposed within the groove. The pushing member 22 is located outside the outer casing 1 and connected to the sliding member 23. A first connector is inserted into the sliding member 23. The first connector is made of a conductive material, and the first connector can selectively connect one of a plurality of second electrode plates 112 to a first electrode plate 111. An elastic structure 21 is disposed on the first connector.

[0056] Specifically, such as Figure 7 As shown, the pushing member 22 is a square block, the sliding member 23 is a cylinder, and the first connecting member is integrally formed with the elastic structure 21, preferably using a conductive metal spring. It can be understood that, in this embodiment, the metal spring provided on the sliding member 23 can selectively connect one of the multiple second pole pieces 112 to the first pole piece 111, and when the sliding member 23 moves to the second pole piece 112, the metal spring on the sliding member 23 can push into the arc-shaped notch of the limiting part 1121.

[0057] Furthermore, in this embodiment, the abutment 22 is provided with anti-slip texture to increase friction with the user's finger surface. For example, as shown... Figure 7 As shown, the upper surface of the control component 2 is provided with multiple protruding semi-cylinders. When the pusher 22 is moved, the multiple protruding semi-cylinders can increase the friction between the hand and the pusher 22, which is beneficial to moving the pusher 22.

[0058] Furthermore, in this embodiment, one of the sliding member 23 and the pushing member 22 is provided with a locking block 221, and the other is provided with a locking groove 231. When the locking block 221 is located in the locking groove 231, the pushing member 22 is engaged with the sliding member 23.

[0059] Specifically, such as Figure 7As shown, the sliding member 23 is provided with a connecting boss 232, and two opposite sides of the connecting boss 232 are provided with slots 231. Two locking blocks 221 are spaced apart below the pushing member 22. When the pushing member 22 is attached to the outer casing 1, the two locking blocks 221 can pass through the sliding grooves of the outer casing 1 and engage with the corresponding slots 231 on the connecting boss 232 to connect the sliding member 23 and the pushing member 22. It is understood that this arrangement facilitates the installation and production of the control component 2, and also facilitates the maintenance and replacement of the control component 2 in case of malfunction.

[0060] Of course, in other embodiments, the number of card blocks 221 and card slots 231 can be determined according to usage requirements, and will not be limited here.

[0061] Furthermore, in some embodiments, one of the pusher 22 and the slider 23 is provided with a connecting post 222, and the other is provided with a connecting hole 233, wherein the connecting post 222 can be inserted into the connecting hole 233.

[0062] Specifically, such as Figure 7 As shown, in this embodiment, a connecting post 222 is also provided below the pushing member 22, and the connecting post 222 is located between the two locking blocks 221. A connecting boss 232 protruding from the sliding member 23 is provided with a connecting hole 233. When the locking block 221 on the pushing member 22 engages with the connecting hole 233 on the connecting boss 232, the connecting post 222 is inserted into the connecting hole 233. It can be understood that the mutually cooperating connecting post 222 and connecting hole 233 not only further improve the stability of the connection between the pushing member 22 and the sliding member 23, but also provide guidance for the engagement of the pushing member 22 and the sliding member 23.

[0063] Example 2

[0064] like Figure 8 As shown, this embodiment provides a multimeter, which differs from the first embodiment in that the input terminal includes a first plug 223 fixed to the push member 22. The bottom wall and / or side wall of the first plug 223 are electrically connected to the first connector through a conductive metal substrate, and are electrically connected to the input terminal of the multimeter body through a contact second electrode 122. The top of the first plug 223 is provided with a slot for plugging and mating with the probe plug.

[0065] Understandably, the plug of the first probe's connecting wire can be inserted into the first connector 223. When it moves to the second electrode 112 via the pusher 22, it contacts the second electrode 112, thereby electrically connecting the second electrode 112 and the first probe.

[0066] More specifically, in this embodiment, a third connector 12 is provided on the side wall of the outer casing 1. The bottom wall and / or side wall of the third connector 12 are electrically connected to the common terminal of the multimeter body, and the connecting wire of the second probe can be plugged into the third connector 12.

[0067] This design allows for the detachability of the first and second probes. On one hand, the probes can be removed for easy storage when the multimeter is not in use. On the other hand, if a probe is damaged, it can be replaced with a new one, avoiding the need to replace the entire multimeter and reducing the cost of using it. Furthermore, since switching the connection between the first probe and the input terminals of each multimeter body can be achieved through the sliding pusher 22, the number of times the cable plug of the first probe needs to be plugged and unplugged during use is reduced, extending its service life and improving the user experience.

[0068] Example 3

[0069] See Figures 9 to 11 This embodiment provides a multimeter, which differs from Embodiment 1 in that the control component 2 includes a knob 24 and a rotating component 25. A mounting hole, circular in shape, is provided on the housing 1, through which the knob 24 passes and is coaxially fixed with the rotating component 25. When the rotating component 25 rotates, it can selectively connect electrically to one of a plurality of second electrodes 112.

[0070] For example, such as Figure 10 and Figure 11 As shown, the knob 24 is a cylindrical block disposed outside the housing 1, and the rotating component 25 is disposed inside the housing 1. An elastic structure 21 is provided at the bottom of the rotating component 25. It can be understood that when the operator rotates the knob 24 outside the housing 1, the rotating component 25 inside the housing 1 rotates with the knob 24 and can selectively contact one of the multiple second electrode plates 112. The elastic structure 21 below the rotating component 25 can be inserted into the arc-shaped notch on the second electrode plate 112. This configuration changes the linear motion of the control component 2 to rotation around its own axis, significantly reducing the range of motion of the control component 2, reducing the space occupied by the control component 2, and contributing to the miniaturization of the multimeter.

[0071] Furthermore, in this embodiment, a second connector 251 is provided at the bottom of the rotating member 25. The second connector 251 is made of conductive material and can selectively contact one of the plurality of second pole pieces 112.

[0072] Specifically, such as Figure 11As shown, a second connecting member 251 is provided below the rotating member 25. Multiple second pole pieces 112 are arranged at intervals along the circumference of the knob 24 on the base 11, and the second connecting member 251 is rotatable about the axis of the rotating member 25. It can be understood that the multiple second pole pieces 112 are located on the same circumference, and when the knob 24 drives the rotating member 25 to rotate, the second connecting member 251 on the rotating member 25 can selectively connect to one of the multiple second pole pieces 112.

[0073] Furthermore, in this embodiment, a second connector 241 is provided on the top of the knob 24, and the bottom wall and / or side wall of the second connector 241 are electrically connected to the second connector 251 through a metal substrate.

[0074] For example, such as Figure 9 and Figure 11 As shown, a second connector 241 is provided on the end of the knob 24 away from the rotating member 25. When the knob 24 is rotated, the second connector 241 contacts the second electrode 112, thereby electrically connecting to a certain input terminal of the multimeter body. The plug of the first test lead's connecting wire can be inserted into the second connector 241. By rotating the knob 24 to rotate the rotating member 25 to connect with a certain second electrode 112, the multimeter's range can be adjusted.

[0075] More specifically, in this embodiment, a fourth connector 13 is provided on the outer casing 1. The fourth connector 13 is arranged side by side with the control component 2. The plug of the second probe connection wire can be inserted into the fourth connector 13 to electrically connect the multimeter to the common terminal.

[0076] This design allows for the detachability of the first and second probes. Firstly, when the multimeter is not in use, the probes can be removed for easy storage. Secondly, if a probe is damaged, only a new probe needs to be replaced, allowing continued use without the need to replace the entire multimeter, thus reducing operating costs. Furthermore, since switching the connection between the first probe and the input terminals of each multimeter unit can be achieved by rotating knob 24, the number of times the first probe's cable connector needs to be plugged and unplugged during use is reduced, extending its lifespan and improving the user experience.

[0077] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multimeter, characterized in that, include: Multimeter body and casing (1); A base (11) is disposed inside the outer casing (1). A plurality of second pole pieces (112) are disposed on the base (11), and the plurality of second pole pieces (112) correspond one-to-one with the plurality of input terminals of the multimeter body. Input terminals are used to connect to the meter probes; A control element (2) is movably disposed on the housing (1) to selectively electrically connect one of the plurality of second pole pieces (112) to the input terminal.

2. The multimeter according to claim 1, characterized in that, The control element (2) slides against the input terminal. A guide element (113) is provided on the base (11). The guide element (113) is located between two adjacent second pole pieces (112). When the control element (2) moves, the guide element (113) makes the control element (2) tend to connect with the second pole piece (112).

3. The multimeter according to claim 1, characterized in that, The control element (2) slides against the input terminal. A limiting part (1121) is provided on the second pole piece (112). An elastic structure (21) is provided on the control element (2). When the control element (2) is connected to the second pole piece (112), the elastic structure (21) is located at the limiting part (1121).

4. The multimeter according to claim 3, characterized in that, The control component (2) includes a sliding component (23) and a pushing component (22); The outer shell (1) is provided with a sliding groove, and the sliding member (23) is slidably disposed in the sliding groove; The input terminal includes a first electrode (111) spaced apart from the second electrode (112); The pusher (22) is located outside the outer shell (1) and connected to the slider (23); the slider (23) is provided with a first connector, which can selectively connect one of the plurality of second pole pieces (112) to the first pole piece (111), and the elastic structure (21) is connected to the first connector.

5. The multimeter according to claim 4, characterized in that, One of the sliding member (23) and the pushing member (22) is provided with a locking block (221), and the other is provided with a locking groove (231). When the locking block (221) is located in the locking groove (231), the pushing member (22) is engaged with the sliding member (23).

6. The multimeter according to claim 4, characterized in that, One of the pusher (22) and the slider (23) is provided with a connecting post (222), and the other is provided with a connecting hole (233). The connecting post (222) can be inserted into the connecting hole (233).

7. The multimeter according to claim 4, characterized in that, The input terminal includes a first plug-in socket (223) fixedly connected to the push member (22). The bottom wall and / or side wall of the first plug-in socket (223) are electrically connected to the input terminal of the multimeter body through a second pole piece (112). The first plug-in socket (223) is used to engage with the plug of the test leads.

8. The multimeter according to claim 1, characterized in that, The control component (2) includes a knob (24) and a rotating component (25); the housing (1) has a mounting hole, the knob (24) passes through the mounting hole and is connected to the rotating component (25), the rotating component (25) is electrically connected to the input terminal, and can be selectively electrically connected to one of a plurality of second pole pieces (112).

9. The multimeter according to claim 8, characterized in that, The input terminal includes a second connector (241) connected to the knob (24), and the second connector (241) is electrically connected to the second electrode (112).

10. The multimeter according to any one of claims 1-9, characterized in that, The surface of the control component (2) is provided with anti-slip texture.

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